mirror of
https://github.com/freebsd/freebsd-src
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Import zlib 1.2.1 (trimmed)
This commit is contained in:
Tim J. Robbins
parent
cdbc2952f3
commit
aea8f65dfe
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/vendor/libz/dist/; revision=131377
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@ -1,5 +1,246 @@
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ChangeLog file for zlib
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ChangeLog file for zlib
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Changes in 1.2.1 (17 November 2003)
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- Remove a tab in contrib/gzappend/gzappend.c
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- Update some interfaces in contrib for new zlib functions
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- Update zlib version number in some contrib entries
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- Add Windows CE definition for ptrdiff_t in zutil.h [Mai, Truta]
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- Support shared libraries on Hurd and KFreeBSD [Brown]
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- Fix error in NO_DIVIDE option of adler32.c
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Changes in 1.2.0.8 (4 November 2003)
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- Update version in contrib/delphi/ZLib.pas and contrib/pascal/zlibpas.pas
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- Add experimental NO_DIVIDE #define in adler32.c
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- Possibly faster on some processors (let me know if it is)
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- Correct Z_BLOCK to not return on first inflate call if no wrap
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- Fix strm->data_type on inflate() return to correctly indicate EOB
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- Add deflatePrime() function for appending in the middle of a byte
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- Add contrib/gzappend for an example of appending to a stream
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- Update win32/DLL_FAQ.txt [Truta]
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- Delete Turbo C comment in README [Truta]
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- Improve some indentation in zconf.h [Truta]
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- Fix infinite loop on bad input in configure script [Church]
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- Fix gzeof() for concatenated gzip files [Johnson]
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- Add example to contrib/visual-basic.txt [Michael B.]
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- Add -p to mkdir's in Makefile.in [vda]
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- Fix configure to properly detect presence or lack of printf functions
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- Add AS400 support [Monnerat]
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- Add a little Cygwin support [Wilson]
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Changes in 1.2.0.7 (21 September 2003)
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- Correct some debug formats in contrib/infback9
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- Cast a type in a debug statement in trees.c
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- Change search and replace delimiter in configure from % to # [Beebe]
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- Update contrib/untgz to 0.2 with various fixes [Truta]
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- Add build support for Amiga [Nikl]
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- Remove some directories in old that have been updated to 1.2
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- Add dylib building for Mac OS X in configure and Makefile.in
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- Remove old distribution stuff from Makefile
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- Update README to point to DLL_FAQ.txt, and add comment on Mac OS X
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- Update links in README
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Changes in 1.2.0.6 (13 September 2003)
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- Minor FAQ updates
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- Update contrib/minizip to 1.00 [Vollant]
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- Remove test of gz functions in example.c when GZ_COMPRESS defined [Truta]
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- Update POSTINC comment for 68060 [Nikl]
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- Add contrib/infback9 with deflate64 decoding (unsupported)
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- For MVS define NO_vsnprintf and undefine FAR [van Burik]
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- Add pragma for fdopen on MVS [van Burik]
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Changes in 1.2.0.5 (8 September 2003)
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- Add OF to inflateBackEnd() declaration in zlib.h
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- Remember start when using gzdopen in the middle of a file
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- Use internal off_t counters in gz* functions to properly handle seeks
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- Perform more rigorous check for distance-too-far in inffast.c
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- Add Z_BLOCK flush option to return from inflate at block boundary
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- Set strm->data_type on return from inflate
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- Indicate bits unused, if at block boundary, and if in last block
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- Replace size_t with ptrdiff_t in crc32.c, and check for correct size
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- Add condition so old NO_DEFLATE define still works for compatibility
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- FAQ update regarding the Windows DLL [Truta]
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- INDEX update: add qnx entry, remove aix entry [Truta]
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- Install zlib.3 into mandir [Wilson]
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- Move contrib/zlib_dll_FAQ.txt to win32/DLL_FAQ.txt; update [Truta]
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- Adapt the zlib interface to the new DLL convention guidelines [Truta]
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- Introduce ZLIB_WINAPI macro to allow the export of functions using
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the WINAPI calling convention, for Visual Basic [Vollant, Truta]
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- Update msdos and win32 scripts and makefiles [Truta]
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- Export symbols by name, not by ordinal, in win32/zlib.def [Truta]
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- Add contrib/ada [Anisimkov]
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- Move asm files from contrib/vstudio/vc70_32 to contrib/asm386 [Truta]
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- Rename contrib/asm386 to contrib/masmx86 [Truta, Vollant]
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- Add contrib/masm686 [Truta]
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- Fix offsets in contrib/inflate86 and contrib/masmx86/inffas32.asm
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[Truta, Vollant]
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- Update contrib/delphi; rename to contrib/pascal; add example [Truta]
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- Remove contrib/delphi2; add a new contrib/delphi [Truta]
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- Avoid inclusion of the nonstandard <memory.h> in contrib/iostream,
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and fix some method prototypes [Truta]
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- Fix the ZCR_SEED2 constant to avoid warnings in contrib/minizip
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[Truta]
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- Avoid the use of backslash (\) in contrib/minizip [Vollant]
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- Fix file time handling in contrib/untgz; update makefiles [Truta]
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- Update contrib/vstudio/vc70_32 to comply with the new DLL guidelines
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[Vollant]
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- Remove contrib/vstudio/vc15_16 [Vollant]
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- Rename contrib/vstudio/vc70_32 to contrib/vstudio/vc7 [Truta]
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- Update README.contrib [Truta]
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- Invert the assignment order of match_head and s->prev[...] in
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INSERT_STRING [Truta]
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- Compare TOO_FAR with 32767 instead of 32768, to avoid 16-bit warnings
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[Truta]
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- Compare function pointers with 0, not with NULL or Z_NULL [Truta]
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- Fix prototype of syncsearch in inflate.c [Truta]
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- Introduce ASMINF macro to be enabled when using an ASM implementation
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of inflate_fast [Truta]
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- Change NO_DEFLATE to NO_GZCOMPRESS [Truta]
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- Modify test_gzio in example.c to take a single file name as a
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parameter [Truta]
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- Exit the example.c program if gzopen fails [Truta]
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- Add type casts around strlen in example.c [Truta]
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- Remove casting to sizeof in minigzip.c; give a proper type
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to the variable compared with SUFFIX_LEN [Truta]
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- Update definitions of STDC and STDC99 in zconf.h [Truta]
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- Synchronize zconf.h with the new Windows DLL interface [Truta]
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- Use SYS16BIT instead of __32BIT__ to distinguish between
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16- and 32-bit platforms [Truta]
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- Use far memory allocators in small 16-bit memory models for
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Turbo C [Truta]
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- Add info about the use of ASMV, ASMINF and ZLIB_WINAPI in
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zlibCompileFlags [Truta]
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- Cygwin has vsnprintf [Wilson]
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- In Windows16, OS_CODE is 0, as in MSDOS [Truta]
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- In Cygwin, OS_CODE is 3 (Unix), not 11 (Windows32) [Wilson]
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Changes in 1.2.0.4 (10 August 2003)
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- Minor FAQ updates
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- Be more strict when checking inflateInit2's windowBits parameter
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- Change NO_GUNZIP compile option to NO_GZIP to cover deflate as well
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- Add gzip wrapper option to deflateInit2 using windowBits
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- Add updated QNX rule in configure and qnx directory [Bonnefoy]
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- Make inflate distance-too-far checks more rigorous
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- Clean up FAR usage in inflate
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- Add casting to sizeof() in gzio.c and minigzip.c
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Changes in 1.2.0.3 (19 July 2003)
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- Fix silly error in gzungetc() implementation [Vollant]
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- Update contrib/minizip and contrib/vstudio [Vollant]
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- Fix printf format in example.c
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- Correct cdecl support in zconf.in.h [Anisimkov]
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- Minor FAQ updates
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Changes in 1.2.0.2 (13 July 2003)
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- Add ZLIB_VERNUM in zlib.h for numerical preprocessor comparisons
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- Attempt to avoid warnings in crc32.c for pointer-int conversion
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- Add AIX to configure, remove aix directory [Bakker]
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- Add some casts to minigzip.c
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- Improve checking after insecure sprintf() or vsprintf() calls
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- Remove #elif's from crc32.c
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- Change leave label to inf_leave in inflate.c and infback.c to avoid
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library conflicts
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- Remove inflate gzip decoding by default--only enable gzip decoding by
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special request for stricter backward compatibility
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- Add zlibCompileFlags() function to return compilation information
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- More typecasting in deflate.c to avoid warnings
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- Remove leading underscore from _Capital #defines [Truta]
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- Fix configure to link shared library when testing
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- Add some Windows CE target adjustments [Mai]
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- Remove #define ZLIB_DLL in zconf.h [Vollant]
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- Add zlib.3 [Rodgers]
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- Update RFC URL in deflate.c and algorithm.txt [Mai]
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- Add zlib_dll_FAQ.txt to contrib [Truta]
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- Add UL to some constants [Truta]
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- Update minizip and vstudio [Vollant]
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- Remove vestigial NEED_DUMMY_RETURN from zconf.in.h
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- Expand use of NO_DUMMY_DECL to avoid all dummy structures
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- Added iostream3 to contrib [Schwardt]
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- Replace rewind() with fseek() for WinCE [Truta]
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- Improve setting of zlib format compression level flags
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- Report 0 for huffman and rle strategies and for level == 0 or 1
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- Report 2 only for level == 6
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- Only deal with 64K limit when necessary at compile time [Truta]
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- Allow TOO_FAR check to be turned off at compile time [Truta]
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- Add gzclearerr() function [Souza]
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- Add gzungetc() function
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Changes in 1.2.0.1 (17 March 2003)
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- Add Z_RLE strategy for run-length encoding [Truta]
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- When Z_RLE requested, restrict matches to distance one
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- Update zlib.h, minigzip.c, gzopen(), gzdopen() for Z_RLE
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- Correct FASTEST compilation to allow level == 0
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- Clean up what gets compiled for FASTEST
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- Incorporate changes to zconf.in.h [Vollant]
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- Refine detection of Turbo C need for dummy returns
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- Refine ZLIB_DLL compilation
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- Include additional header file on VMS for off_t typedef
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- Try to use _vsnprintf where it supplants vsprintf [Vollant]
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- Add some casts in inffast.c
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- Enchance comments in zlib.h on what happens if gzprintf() tries to
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write more than 4095 bytes before compression
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- Remove unused state from inflateBackEnd()
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- Remove exit(0) from minigzip.c, example.c
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- Get rid of all those darn tabs
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- Add "check" target to Makefile.in that does the same thing as "test"
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- Add "mostlyclean" and "maintainer-clean" targets to Makefile.in
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- Update contrib/inflate86 [Anderson]
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- Update contrib/testzlib, contrib/vstudio, contrib/minizip [Vollant]
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- Add msdos and win32 directories with makefiles [Truta]
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- More additions and improvements to the FAQ
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Changes in 1.2.0 (9 March 2003)
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- New and improved inflate code
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- About 20% faster
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- Does not allocate 32K window unless and until needed
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- Automatically detects and decompresses gzip streams
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- Raw inflate no longer needs an extra dummy byte at end
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- Added inflateBack functions using a callback interface--even faster
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than inflate, useful for file utilities (gzip, zip)
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- Added inflateCopy() function to record state for random access on
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externally generated deflate streams (e.g. in gzip files)
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- More readable code (I hope)
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- New and improved crc32()
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- About 50% faster, thanks to suggestions from Rodney Brown
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- Add deflateBound() and compressBound() functions
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- Fix memory leak in deflateInit2()
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- Permit setting dictionary for raw deflate (for parallel deflate)
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- Fix const declaration for gzwrite()
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- Check for some malloc() failures in gzio.c
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- Fix bug in gzopen() on single-byte file 0x1f
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- Fix bug in gzread() on concatenated file with 0x1f at end of buffer
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and next buffer doesn't start with 0x8b
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- Fix uncompress() to return Z_DATA_ERROR on truncated input
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- Free memory at end of example.c
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- Remove MAX #define in trees.c (conflicted with some libraries)
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- Fix static const's in deflate.c, gzio.c, and zutil.[ch]
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- Declare malloc() and free() in gzio.c if STDC not defined
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- Use malloc() instead of calloc() in zutil.c if int big enough
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- Define STDC for AIX
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- Add aix/ with approach for compiling shared library on AIX
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- Add HP-UX support for shared libraries in configure
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- Add OpenUNIX support for shared libraries in configure
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- Use $cc instead of gcc to build shared library
|
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- Make prefix directory if needed when installing
|
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- Correct Macintosh avoidance of typedef Byte in zconf.h
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- Correct Turbo C memory allocation when under Linux
|
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- Use libz.a instead of -lz in Makefile (assure use of compiled library)
|
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- Update configure to check for snprintf or vsnprintf functions and their
|
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return value, warn during make if using an insecure function
|
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- Fix configure problem with compile-time knowledge of HAVE_UNISTD_H that
|
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is lost when library is used--resolution is to build new zconf.h
|
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- Documentation improvements (in zlib.h):
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- Document raw deflate and inflate
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- Update RFCs URL
|
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- Point out that zlib and gzip formats are different
|
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- Note that Z_BUF_ERROR is not fatal
|
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- Document string limit for gzprintf() and possible buffer overflow
|
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- Note requirement on avail_out when flushing
|
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- Note permitted values of flush parameter of inflate()
|
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- Add some FAQs (and even answers) to the FAQ
|
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- Add contrib/inflate86/ for x86 faster inflate
|
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- Add contrib/blast/ for PKWare Data Compression Library decompression
|
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- Add contrib/puff/ simple inflate for deflate format description
|
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|
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Changes in 1.1.4 (11 March 2002)
|
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- ZFREE was repeated on same allocation on some error conditions.
|
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@ -10,7 +251,7 @@ Changes in 1.1.4 (11 March 2002)
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less than 32K.
|
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- force windowBits > 8 to avoid a bug in the encoder for a window size
|
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of 256 bytes. (A complete fix will be available in 1.1.5).
|
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|
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|
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Changes in 1.1.3 (9 July 1998)
|
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- fix "an inflate input buffer bug that shows up on rare but persistent
|
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occasions" (Mark)
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@ -184,13 +425,13 @@ Changes in 1.0.6 (19 Jan 1998)
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- added Makefile.nt (thanks to Stephen Williams)
|
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- added the unsupported "contrib" directory:
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contrib/asm386/ by Gilles Vollant <info@winimage.com>
|
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386 asm code replacing longest_match().
|
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386 asm code replacing longest_match().
|
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contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
|
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A C++ I/O streams interface to the zlib gz* functions
|
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contrib/iostream2/ by Tyge Løvset <Tyge.Lovset@cmr.no>
|
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Another C++ I/O streams interface
|
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Another C++ I/O streams interface
|
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contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
|
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A very simple tar.gz file extractor using zlib
|
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A very simple tar.gz file extractor using zlib
|
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contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
|
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How to use compress(), uncompress() and the gz* functions from VB.
|
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- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
|
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|
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@ -217,7 +458,7 @@ Changes in 1.0.6 (19 Jan 1998)
|
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- add NEED_DUMMY_RETURN for Borland
|
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- use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
|
||||
- allow compilation with CC
|
||||
- defined STDC for OS/2 (David Charlap)
|
||||
- defined STDC for OS/2 (David Charlap)
|
||||
- limit external names to 8 chars for MVS (Thomas Lund)
|
||||
- in minigzip.c, use static buffers only for 16-bit systems
|
||||
- fix suffix check for "minigzip -d foo.gz"
|
||||
|
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@ -242,7 +483,7 @@ Changes in 1.0.5 (3 Jan 98)
|
|||
- Eliminate memory leaks on error conditions in inflate
|
||||
- Removed some vestigial code in inflate
|
||||
- Update web address in README
|
||||
|
||||
|
||||
Changes in 1.0.4 (24 Jul 96)
|
||||
- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
|
||||
bit, so the decompressor could decompress all the correct data but went
|
||||
|
|
|
|||
247
lib/libz/FAQ
247
lib/libz/FAQ
|
|
@ -1,8 +1,8 @@
|
|||
|
||||
Frequently Asked Questions about zlib
|
||||
Frequently Asked Questions about zlib
|
||||
|
||||
|
||||
If your question is not there, please check the zlib home page
|
||||
If your question is not there, please check the zlib home page
|
||||
http://www.zlib.org which may have more recent information.
|
||||
The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
|
||||
|
||||
|
|
@ -13,14 +13,15 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
|
|||
|
||||
2. Where can I get a Windows DLL version?
|
||||
|
||||
The zlib sources can be compiled without change to produce a DLL. If you
|
||||
want a precompiled DLL, see http://www.winimage.com/zLibDll/ . Questions
|
||||
about the zlib DLL should be sent to Gilles Vollant (info@winimage.com).
|
||||
The zlib sources can be compiled without change to produce a DLL.
|
||||
See the file win32/DLL_FAQ.txt in the zlib distribution.
|
||||
Pointers to the precompiled DLL are found in the zlib web site at
|
||||
http://www.zlib.org.
|
||||
|
||||
3. Where can I get a Visual Basic interface to zlib?
|
||||
|
||||
See
|
||||
* http://www.winimage.com/zLibDll/cmp-z-it.zip
|
||||
* http://www.winimage.com/zLibDll/
|
||||
* http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
|
||||
* contrib/visual-basic.txt in the zlib distribution
|
||||
|
||||
|
|
@ -36,6 +37,11 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
|
|||
Before making the call, make sure that avail_in and avail_out are not
|
||||
zero. When setting the parameter flush equal to Z_FINISH, also make sure
|
||||
that avail_out is big enough to allow processing all pending input.
|
||||
Note that a Z_BUF_ERROR is not fatal--another call to deflate() or
|
||||
inflate() can be made with more input or output space. A Z_BUF_ERROR
|
||||
may in fact be unavoidable depending on how the functions are used, since
|
||||
it is not possible to tell whether or not there is more output pending
|
||||
when strm.avail_out returns with zero.
|
||||
|
||||
6. Where's the zlib documentation (man pages, etc.)?
|
||||
|
||||
|
|
@ -61,14 +67,13 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
|
|||
If "make test" produces something like
|
||||
|
||||
example.o(.text+0x154): undefined reference to `gzputc'
|
||||
|
||||
|
||||
check that you don't have old files libz.* in /usr/lib, /usr/local/lib or
|
||||
/usr/X11R6/lib. Remove any old versions, then do "make install".
|
||||
|
||||
10. I need a Delphi interface to zlib.
|
||||
|
||||
See the directories contrib/delphi and contrib/delphi2 in the zlib
|
||||
distribution.
|
||||
See the contrib/delphi directory in the zlib distribution.
|
||||
|
||||
11. Can zlib handle .zip archives?
|
||||
|
||||
|
|
@ -85,16 +90,226 @@ The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
|
|||
./configure -s
|
||||
make
|
||||
|
||||
14. Why does "make test" fail on Mac OS X?
|
||||
14. How do I install a shared zlib library on Unix?
|
||||
|
||||
Mac OS X already includes zlib as a shared library, and so -lz links the
|
||||
shared library instead of the one that the "make" compiled. For zlib
|
||||
1.1.3, the two are incompatible due to different compile-time
|
||||
options. Simply change the -lz in the Makefile to libz.a, and it will use
|
||||
the compiled library instead of the shared one and the "make test" will
|
||||
succeed.
|
||||
make install
|
||||
|
||||
However, many flavors of Unix come with a shared zlib already installed.
|
||||
Before going to the trouble of compiling a shared version of zlib and
|
||||
trying to install it, you may want to check if it's already there! If you
|
||||
can #include <zlib.h>, it's there. The -lz option will probably link to it.
|
||||
|
||||
15. I have a question about OttoPDF
|
||||
|
||||
We are not the authors of OttoPDF. The real author is on the OttoPDF web
|
||||
site Joel Hainley jhainley@myndkryme.com.
|
||||
|
||||
16. Why does gzip give an error on a file I make with compress/deflate?
|
||||
|
||||
The compress and deflate functions produce data in the zlib format, which
|
||||
is different and incompatible with the gzip format. The gz* functions in
|
||||
zlib on the other hand use the gzip format. Both the zlib and gzip
|
||||
formats use the same compressed data format internally, but have different
|
||||
headers and trailers around the compressed data.
|
||||
|
||||
17. Ok, so why are there two different formats?
|
||||
|
||||
The gzip format was designed to retain the directory information about
|
||||
a single file, such as the name and last modification date. The zlib
|
||||
format on the other hand was designed for in-memory and communication
|
||||
channel applications, and has a much more compact header and trailer and
|
||||
uses a faster integrity check than gzip.
|
||||
|
||||
18. Well that's nice, but how do I make a gzip file in memory?
|
||||
|
||||
You can request that deflate write the gzip format instead of the zlib
|
||||
format using deflateInit2(). You can also request that inflate decode
|
||||
the gzip format using inflateInit2(). Read zlib.h for more details.
|
||||
|
||||
Note that you cannot specify special gzip header contents (e.g. a file
|
||||
name or modification date), nor will inflate tell you what was in the
|
||||
gzip header. If you need to customize the header or see what's in it,
|
||||
you can use the raw deflate and inflate operations and the crc32()
|
||||
function and roll your own gzip encoding and decoding. Read the gzip
|
||||
RFC 1952 for details of the header and trailer format.
|
||||
|
||||
19. Is zlib thread-safe?
|
||||
|
||||
Yes. However any library routines that zlib uses and any application-
|
||||
provided memory allocation routines must also be thread-safe. zlib's gz*
|
||||
functions use stdio library routines, and most of zlib's functions use the
|
||||
library memory allocation routines by default. zlib's Init functions allow
|
||||
for the application to provide custom memory allocation routines.
|
||||
|
||||
Of course, you should only operate on any given zlib or gzip stream from a
|
||||
single thread at a time.
|
||||
|
||||
20. Can I use zlib in my commercial application?
|
||||
|
||||
Yes. Please read the license in zlib.h.
|
||||
|
||||
21. Is zlib under the GNU license?
|
||||
|
||||
No. Please read the license in zlib.h.
|
||||
|
||||
22. The license says that altered source versions must be "plainly marked". So
|
||||
what exactly do I need to do to meet that requirement?
|
||||
|
||||
You need to change the ZLIB_VERSION and ZLIB_VERNUM #defines in zlib.h. In
|
||||
particular, the final version number needs to be changed to "f", and an
|
||||
identification string should be appended to ZLIB_VERSION. Version numbers
|
||||
x.x.x.f are reserved for modifications to zlib by others than the zlib
|
||||
maintainers. For example, if the version of the base zlib you are altering
|
||||
is "1.2.3.4", then in zlib.h you should change ZLIB_VERNUM to 0x123f, and
|
||||
ZLIB_VERSION to something like "1.2.3.f-zachary-mods-v3". You can also
|
||||
update the version strings in deflate.c and inftrees.c.
|
||||
|
||||
For altered source distributions, you should also note the origin and
|
||||
nature of the changes in zlib.h, as well as in ChangeLog and README, along
|
||||
with the dates of the alterations. The origin should include at least your
|
||||
name (or your company's name), and an email address to contact for help or
|
||||
issues with the library.
|
||||
|
||||
Note that distributing a compiled zlib library along with zlib.h and
|
||||
zconf.h is also a source distribution, and so you should change
|
||||
ZLIB_VERSION and ZLIB_VERNUM and note the origin and nature of the changes
|
||||
in zlib.h as you would for a full source distribution.
|
||||
|
||||
23. Will zlib work on a big-endian or little-endian architecture, and can I
|
||||
exchange compressed data between them?
|
||||
|
||||
Yes and yes.
|
||||
|
||||
24. Will zlib work on a 64-bit machine?
|
||||
|
||||
It should. It has been tested on 64-bit machines, and has no dependence
|
||||
on any data types being limited to 32-bits in length. If you have any
|
||||
difficulties, please provide a complete problem report to zlib@gzip.org
|
||||
|
||||
25. Will zlib decompress data from the PKWare Data Compression Library?
|
||||
|
||||
No. The PKWare DCL uses a completely different compressed data format
|
||||
than does PKZIP and zlib. However, you can look in zlib's contrib/blast
|
||||
directory for a possible solution to your problem.
|
||||
|
||||
26. Can I access data randomly in a compressed stream?
|
||||
|
||||
No, not without some preparation. If when compressing you periodically
|
||||
use Z_FULL_FLUSH, carefully write all the pending data at those points,
|
||||
and keep an index of those locations, then you can start decompression
|
||||
at those points. You have to be careful to not use Z_FULL_FLUSH too
|
||||
often, since it can significantly degrade compression.
|
||||
|
||||
27. Does zlib work on MVS, OS/390, CICS, etc.?
|
||||
|
||||
We don't know for sure. We have heard occasional reports of success on
|
||||
these systems. If you do use it on one of these, please provide us with
|
||||
a report, instructions, and patches that we can reference when we get
|
||||
these questions. Thanks.
|
||||
|
||||
28. Is there some simpler, easier to read version of inflate I can look at
|
||||
to understand the deflate format?
|
||||
|
||||
First off, you should read RFC 1951. Second, yes. Look in zlib's
|
||||
contrib/puff directory.
|
||||
|
||||
29. Does zlib infringe on any patents?
|
||||
|
||||
As far as we know, no. In fact, that was originally the whole point behind
|
||||
zlib. Look here for some more information:
|
||||
|
||||
http://www.gzip.org/#faq11
|
||||
|
||||
30. Can zlib work with greater than 4 GB of data?
|
||||
|
||||
Yes. inflate() and deflate() will process any amount of data correctly.
|
||||
Each call of inflate() or deflate() is limited to input and output chunks
|
||||
of the maximum value that can be stored in the compiler's "unsigned int"
|
||||
type, but there is no limit to the number of chunks. Note however that the
|
||||
strm.total_in and strm_total_out counters may be limited to 4 GB. These
|
||||
counters are provided as a convenience and are not used internally by
|
||||
inflate() or deflate(). The application can easily set up its own counters
|
||||
updated after each call of inflate() or deflate() to count beyond 4 GB.
|
||||
compress() and uncompress() may be limited to 4 GB, since they operate in a
|
||||
single call. gzseek() and gztell() may be limited to 4 GB depending on how
|
||||
zlib is compiled. See the zlibCompileFlags() function in zlib.h.
|
||||
|
||||
The word "may" appears several times above since there is a 4 GB limit
|
||||
only if the compiler's "long" type is 32 bits. If the compiler's "long"
|
||||
type is 64 bits, then the limit is 16 exabytes.
|
||||
|
||||
31. Does zlib have any security vulnerabilities?
|
||||
|
||||
The only one that we are aware of is potentially in gzprintf(). If zlib
|
||||
is compiled to use sprintf() or vsprintf(), then there is no protection
|
||||
against a buffer overflow of a 4K string space, other than the caller of
|
||||
gzprintf() assuring that the output will not exceed 4K. On the other
|
||||
hand, if zlib is compiled to use snprintf() or vsnprintf(), which should
|
||||
normally be the case, then there is no vulnerability. The ./configure
|
||||
script will display warnings if an insecure variation of sprintf() will
|
||||
be used by gzprintf(). Also the zlibCompileFlags() function will return
|
||||
information on what variant of sprintf() is used by gzprintf().
|
||||
|
||||
If you don't have snprintf() or vsnprintf() and would like one, you can
|
||||
find a portable implementation here:
|
||||
|
||||
http://www.ijs.si/software/snprintf/
|
||||
|
||||
Note that you should be using the most recent version of zlib. Versions
|
||||
1.1.3 and before were subject to a double-free vulnerability.
|
||||
|
||||
32. Is there a Java version of zlib?
|
||||
|
||||
Probably what you want is to use zlib in Java. zlib is already included
|
||||
as part of the Java SDK in the java.util.zip package. If you really want
|
||||
a version of zlib written in the Java language, look on the zlib home
|
||||
page for links: http://www.zlib.org/
|
||||
|
||||
33. I get this or that compiler or source-code scanner warning when I crank it
|
||||
up to maximally-pendantic. Can't you guys write proper code?
|
||||
|
||||
Many years ago, we gave up attempting to avoid warnings on every compiler
|
||||
in the universe. It just got to be a waste of time, and some compilers
|
||||
were downright silly. So now, we simply make sure that the code always
|
||||
works.
|
||||
|
||||
34. Will zlib read the (insert any ancient or arcane format here) compressed
|
||||
data format?
|
||||
|
||||
Probably not. Look in the comp.compression FAQ for pointers to various
|
||||
formats and associated software.
|
||||
|
||||
35. How can I encrypt/decrypt zip files with zlib?
|
||||
|
||||
zlib doesn't support encryption. The original PKZIP encryption is very weak
|
||||
and can be broken with freely available programs. To get strong encryption,
|
||||
use gpg ( http://www.gnupg.org/ ) which already includes zlib compression.
|
||||
For PKZIP compatible "encryption", look at http://www.info-zip.org/
|
||||
|
||||
36. What's the difference between the "gzip" and "deflate" HTTP 1.1 encodings?
|
||||
|
||||
"gzip" is the gzip format, and "deflate" is the zlib format. They should
|
||||
probably have called the second one "zlib" instead to avoid confusion
|
||||
with the raw deflate compressed data format. While the HTTP 1.1 RFC 2616
|
||||
correctly points to the zlib specification in RFC 1950 for the "deflate"
|
||||
transfer encoding, there have been reports of servers and browsers that
|
||||
incorrectly produce or expect raw deflate data per the deflate
|
||||
specficiation in RFC 1951, most notably Microsoft. So even though the
|
||||
"deflate" transfer encoding using the zlib format would be the more
|
||||
efficient approach (and in fact exactly what the zlib format was designed
|
||||
for), using the "gzip" transfer encoding is probably more reliable due to
|
||||
an unfortunate choice of name on the part of the HTTP 1.1 authors.
|
||||
|
||||
Bottom line: use the gzip format for HTTP 1.1 encoding.
|
||||
|
||||
37. Does zlib support the new "Deflate64" format introduced by PKWare?
|
||||
|
||||
No. PKWare has apparently decided to keep that format proprietary, since
|
||||
they have not documented it as they have previous compression formats.
|
||||
In any case, the compression improvements are so modest compared to other
|
||||
more modern approaches, that it's not worth the effort to implement.
|
||||
|
||||
38. Can you please sign these lengthy legal documents and fax them back to us
|
||||
so that we can use your software in our product?
|
||||
|
||||
No. Go away. Shoo.
|
||||
|
|
|
|||
|
|
@ -1,86 +1,48 @@
|
|||
ChangeLog history of changes
|
||||
INDEX this file
|
||||
FAQ Frequently Asked Questions about zlib
|
||||
Make_vms.com script for Vax/VMS
|
||||
Makefile makefile for Unix (generated by configure)
|
||||
Makefile.in makefile for Unix (template for configure)
|
||||
Makefile.riscos makefile for RISCOS
|
||||
README guess what
|
||||
algorithm.txt description of the (de)compression algorithm
|
||||
configure configure script for Unix
|
||||
descrip.mms makefile for Vax/VMS
|
||||
zlib.3 mini man page for zlib (volunteers to write full
|
||||
man pages from zlib.h welcome. write to jloup@gzip.org)
|
||||
ChangeLog history of changes
|
||||
FAQ Frequently Asked Questions about zlib
|
||||
INDEX this file
|
||||
Makefile makefile for Unix (generated by configure)
|
||||
Makefile.in makefile for Unix (template for configure)
|
||||
README guess what
|
||||
algorithm.txt description of the (de)compression algorithm
|
||||
configure configure script for Unix
|
||||
zconf.in.h template for zconf.h (used by configure)
|
||||
|
||||
amiga/Makefile.sas makefile for Amiga SAS/C
|
||||
amiga/Makefile.pup makefile for Amiga powerUP SAS/C PPC
|
||||
msdos/ makefiles for MSDOS
|
||||
old/ makefiles for various architectures and zlib documentation
|
||||
files that have not yet been updated for zlib 1.2.x
|
||||
qnx/ makefiles for QNX
|
||||
win32/ makefiles for Windows
|
||||
|
||||
msdos/Makefile.w32 makefile for Microsoft Visual C++ 32-bit
|
||||
msdos/Makefile.b32 makefile for Borland C++ 32-bit
|
||||
msdos/Makefile.bor makefile for Borland C/C++ 16-bit
|
||||
msdos/Makefile.dj2 makefile for DJGPP 2.x
|
||||
msdos/Makefile.emx makefile for EMX 0.9c (32-bit DOS/OS2)
|
||||
msdos/Makefile.msc makefile for Microsoft C 16-bit
|
||||
msdos/Makefile.tc makefile for Turbo C
|
||||
msdos/Makefile.wat makefile for Watcom C
|
||||
msdos/zlib.def definition file for Windows DLL
|
||||
msdos/zlib.rc definition file for Windows DLL
|
||||
|
||||
nt/Makefile.nt makefile for Windows NT
|
||||
nt/zlib.dnt definition file for Windows NT DLL
|
||||
nt/Makefile.emx makefile for EMX 0.9c/RSXNT 1.41 (Win32 Intel)
|
||||
nt/Makefile.gcc makefile for Windows NT using GCC (mingw32)
|
||||
|
||||
|
||||
zlib public header files (must be kept):
|
||||
zlib public header files (must be kept):
|
||||
zconf.h
|
||||
zlib.h
|
||||
|
||||
private source files used to build the zlib library:
|
||||
private source files used to build the zlib library:
|
||||
adler32.c
|
||||
compress.c
|
||||
crc32.c
|
||||
crc32.h
|
||||
deflate.c
|
||||
deflate.h
|
||||
gzio.c
|
||||
infblock.c
|
||||
infblock.h
|
||||
infcodes.c
|
||||
infcodes.h
|
||||
infback.c
|
||||
inffast.c
|
||||
inffast.h
|
||||
inffixed.h
|
||||
inflate.c
|
||||
inflate.h
|
||||
inftrees.c
|
||||
inftrees.h
|
||||
infutil.c
|
||||
infutil.h
|
||||
maketree.c
|
||||
trees.c
|
||||
trees.h
|
||||
uncompr.c
|
||||
zutil.c
|
||||
zutil.h
|
||||
|
||||
source files for sample programs:
|
||||
source files for sample programs:
|
||||
example.c
|
||||
minigzip.c
|
||||
|
||||
unsupported contribution by third parties
|
||||
|
||||
contrib/asm386/ by Gilles Vollant <info@winimage.com>
|
||||
386 asm code replacing longest_match().
|
||||
|
||||
contrib/minizip/ by Gilles Vollant <info@winimage.com>
|
||||
Mini zip and unzip based on zlib
|
||||
See http://www.winimage.com/zLibDll/unzip.html
|
||||
|
||||
contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
|
||||
A C++ I/O streams interface to the zlib gz* functions
|
||||
|
||||
contrib/iostream2/ by Tyge Løvset <Tyge.Lovset@cmr.no>
|
||||
Another C++ I/O streams interface
|
||||
|
||||
contrib/untgz/ by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
|
||||
A very simple tar.gz extractor using zlib
|
||||
|
||||
contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
|
||||
How to use compress(), uncompress() and the gz* functions from VB.
|
||||
unsupported contribution by third parties
|
||||
See contrib/README.contrib
|
||||
|
|
|
|||
131
lib/libz/README
131
lib/libz/README
|
|
@ -1,110 +1,87 @@
|
|||
zlib 1.1.4 is a general purpose data compression library. All the code
|
||||
is thread safe. The data format used by the zlib library
|
||||
is described by RFCs (Request for Comments) 1950 to 1952 in the files
|
||||
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
|
||||
format) and rfc1952.txt (gzip format). These documents are also available in
|
||||
other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
|
||||
ZLIB DATA COMPRESSION LIBRARY
|
||||
|
||||
zlib 1.2.1 is a general purpose data compression library. All the code is
|
||||
thread safe. The data format used by the zlib library is described by RFCs
|
||||
(Request for Comments) 1950 to 1952 in the files
|
||||
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
|
||||
and rfc1952.txt (gzip format). These documents are also available in other
|
||||
formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
|
||||
|
||||
All functions of the compression library are documented in the file zlib.h
|
||||
(volunteer to write man pages welcome, contact jloup@gzip.org). A usage
|
||||
example of the library is given in the file example.c which also tests that
|
||||
the library is working correctly. Another example is given in the file
|
||||
minigzip.c. The compression library itself is composed of all source files
|
||||
except example.c and minigzip.c.
|
||||
(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
|
||||
of the library is given in the file example.c which also tests that the library
|
||||
is working correctly. Another example is given in the file minigzip.c. The
|
||||
compression library itself is composed of all source files except example.c and
|
||||
minigzip.c.
|
||||
|
||||
To compile all files and run the test program, follow the instructions
|
||||
given at the top of Makefile. In short "make test; make install"
|
||||
should work for most machines. For Unix: "./configure; make test; make install"
|
||||
For MSDOS, use one of the special makefiles such as Makefile.msc.
|
||||
For VMS, use Make_vms.com or descrip.mms.
|
||||
To compile all files and run the test program, follow the instructions given at
|
||||
the top of Makefile. In short "make test; make install" should work for most
|
||||
machines. For Unix: "./configure; make test; make install" For MSDOS, use one
|
||||
of the special makefiles such as Makefile.msc. For VMS, use Make_vms.com or
|
||||
descrip.mms.
|
||||
|
||||
Questions about zlib should be sent to <zlib@gzip.org>, or to
|
||||
Gilles Vollant <info@winimage.com> for the Windows DLL version.
|
||||
The zlib home page is http://www.zlib.org or http://www.gzip.org/zlib/
|
||||
Before reporting a problem, please check this site to verify that
|
||||
you have the latest version of zlib; otherwise get the latest version and
|
||||
check whether the problem still exists or not.
|
||||
Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
|
||||
<info@winimage.com> for the Windows DLL version. The zlib home page is
|
||||
http://www.zlib.org or http://www.gzip.org/zlib/ Before reporting a problem,
|
||||
please check this site to verify that you have the latest version of zlib;
|
||||
otherwise get the latest version and check whether the problem still exists or
|
||||
not.
|
||||
|
||||
PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html
|
||||
before asking for help.
|
||||
PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html before asking
|
||||
for help.
|
||||
|
||||
Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
|
||||
issue of Dr. Dobb's Journal; a copy of the article is available in
|
||||
http://dogma.net/markn/articles/zlibtool/zlibtool.htm
|
||||
|
||||
The changes made in version 1.1.4 are documented in the file ChangeLog.
|
||||
The only changes made since 1.1.3 are bug corrections:
|
||||
|
||||
- ZFREE was repeated on same allocation on some error conditions.
|
||||
This creates a security problem described in
|
||||
http://www.zlib.org/advisory-2002-03-11.txt
|
||||
- Returned incorrect error (Z_MEM_ERROR) on some invalid data
|
||||
- Avoid accesses before window for invalid distances with inflate window
|
||||
less than 32K.
|
||||
- force windowBits > 8 to avoid a bug in the encoder for a window size
|
||||
of 256 bytes. (A complete fix will be available in 1.1.5).
|
||||
|
||||
The beta version 1.1.5beta includes many more changes. A new official
|
||||
version 1.1.5 will be released as soon as extensive testing has been
|
||||
completed on it.
|
||||
|
||||
The changes made in version 1.2.1 are documented in the file ChangeLog.
|
||||
|
||||
Unsupported third party contributions are provided in directory "contrib".
|
||||
|
||||
A Java implementation of zlib is available in the Java Development Kit
|
||||
http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
|
||||
http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/package-summary.html
|
||||
See the zlib home page http://www.zlib.org for details.
|
||||
|
||||
A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
|
||||
is in the CPAN (Comprehensive Perl Archive Network) sites
|
||||
A Perl interface to zlib written by Paul Marquess <pmqs@cpan.org> is in the
|
||||
CPAN (Comprehensive Perl Archive Network) sites
|
||||
http://www.cpan.org/modules/by-module/Compress/
|
||||
|
||||
A Python interface to zlib written by A.M. Kuchling <amk@magnet.com>
|
||||
is available in Python 1.5 and later versions, see
|
||||
A Python interface to zlib written by A.M. Kuchling <amk@magnet.com> is
|
||||
available in Python 1.5 and later versions, see
|
||||
http://www.python.org/doc/lib/module-zlib.html
|
||||
|
||||
A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com>
|
||||
is availlable at http://www.westend.com/~kupries/doc/trf/man/man.html
|
||||
A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com> is
|
||||
availlable at http://www.oche.de/~akupries/soft/trf/trf_zip.html
|
||||
|
||||
An experimental package to read and write files in .zip format,
|
||||
written on top of zlib by Gilles Vollant <info@winimage.com>, is
|
||||
available at http://www.winimage.com/zLibDll/unzip.html
|
||||
and also in the contrib/minizip directory of zlib.
|
||||
An experimental package to read and write files in .zip format, written on top
|
||||
of zlib by Gilles Vollant <info@winimage.com>, is available in the
|
||||
contrib/minizip directory of zlib.
|
||||
|
||||
|
||||
Notes for some targets:
|
||||
|
||||
- To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc
|
||||
and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL
|
||||
The zlib DLL support was initially done by Alessandro Iacopetti and is
|
||||
now maintained by Gilles Vollant <info@winimage.com>. Check the zlib DLL
|
||||
home page at http://www.winimage.com/zLibDll
|
||||
- For Windows DLL versions, please see win32/DLL_FAQ.txt
|
||||
|
||||
From Visual Basic, you can call the DLL functions which do not take
|
||||
a structure as argument: compress, uncompress and all gz* functions.
|
||||
See contrib/visual-basic.txt for more information, or get
|
||||
http://www.tcfb.com/dowseware/cmp-z-it.zip
|
||||
- For 64-bit Irix, deflate.c must be compiled without any optimization. With
|
||||
-O, one libpng test fails. The test works in 32 bit mode (with the -n32
|
||||
compiler flag). The compiler bug has been reported to SGI.
|
||||
|
||||
- For 64-bit Irix, deflate.c must be compiled without any optimization.
|
||||
With -O, one libpng test fails. The test works in 32 bit mode (with
|
||||
the -n32 compiler flag). The compiler bug has been reported to SGI.
|
||||
- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1 it works
|
||||
when compiled with cc.
|
||||
|
||||
- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1
|
||||
it works when compiled with cc.
|
||||
- On Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1 is
|
||||
necessary to get gzprintf working correctly. This is done by configure.
|
||||
|
||||
- on Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1
|
||||
is necessary to get gzprintf working correctly. This is done by configure.
|
||||
|
||||
- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works
|
||||
with other compilers. Use "make test" to check your compiler.
|
||||
- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works with
|
||||
other compilers. Use "make test" to check your compiler.
|
||||
|
||||
- gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
|
||||
|
||||
- For Turbo C the small model is supported only with reduced performance to
|
||||
avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
|
||||
- For PalmOs, see http://palmzlib.sourceforge.net/
|
||||
|
||||
- For PalmOs, see http://www.cs.uit.no/~perm/PASTA/pilot/software.html
|
||||
Per Harald Myrvang <perm@stud.cs.uit.no>
|
||||
- When building a shared, i.e. dynamic library on Mac OS X, the library must be
|
||||
installed before testing (do "make install" before "make test"), since the
|
||||
library location is specified in the library.
|
||||
|
||||
|
||||
Acknowledgments:
|
||||
|
|
@ -116,7 +93,7 @@ Acknowledgments:
|
|||
|
||||
Copyright notice:
|
||||
|
||||
(C) 1995-2002 Jean-loup Gailly and Mark Adler
|
||||
(C) 1995-2003 Jean-loup Gailly and Mark Adler
|
||||
|
||||
This software is provided 'as-is', without any express or implied
|
||||
warranty. In no event will the authors be held liable for any damages
|
||||
|
|
@ -144,4 +121,6 @@ entirely written by Jean-loup Gailly and Mark Adler; it does not
|
|||
include third-party code.
|
||||
|
||||
If you redistribute modified sources, we would appreciate that you include
|
||||
in the file ChangeLog history information documenting your changes.
|
||||
in the file ChangeLog history information documenting your changes. Please
|
||||
read the FAQ for more information on the distribution of modified source
|
||||
versions.
|
||||
|
|
|
|||
|
|
@ -1,13 +1,14 @@
|
|||
/* adler32.c -- compute the Adler-32 checksum of a data stream
|
||||
* Copyright (C) 1995-2002 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#define ZLIB_INTERNAL
|
||||
#include "zlib.h"
|
||||
|
||||
#define BASE 65521L /* largest prime smaller than 65536 */
|
||||
#define BASE 65521UL /* largest prime smaller than 65536 */
|
||||
#define NMAX 5552
|
||||
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
|
||||
|
||||
|
|
@ -17,6 +18,31 @@
|
|||
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
|
||||
#define DO16(buf) DO8(buf,0); DO8(buf,8);
|
||||
|
||||
#ifdef NO_DIVIDE
|
||||
# define MOD(a) \
|
||||
do { \
|
||||
if (a >= (BASE << 16)) a -= (BASE << 16); \
|
||||
if (a >= (BASE << 15)) a -= (BASE << 15); \
|
||||
if (a >= (BASE << 14)) a -= (BASE << 14); \
|
||||
if (a >= (BASE << 13)) a -= (BASE << 13); \
|
||||
if (a >= (BASE << 12)) a -= (BASE << 12); \
|
||||
if (a >= (BASE << 11)) a -= (BASE << 11); \
|
||||
if (a >= (BASE << 10)) a -= (BASE << 10); \
|
||||
if (a >= (BASE << 9)) a -= (BASE << 9); \
|
||||
if (a >= (BASE << 8)) a -= (BASE << 8); \
|
||||
if (a >= (BASE << 7)) a -= (BASE << 7); \
|
||||
if (a >= (BASE << 6)) a -= (BASE << 6); \
|
||||
if (a >= (BASE << 5)) a -= (BASE << 5); \
|
||||
if (a >= (BASE << 4)) a -= (BASE << 4); \
|
||||
if (a >= (BASE << 3)) a -= (BASE << 3); \
|
||||
if (a >= (BASE << 2)) a -= (BASE << 2); \
|
||||
if (a >= (BASE << 1)) a -= (BASE << 1); \
|
||||
if (a >= BASE) a -= BASE; \
|
||||
} while (0)
|
||||
#else
|
||||
# define MOD(a) a %= BASE
|
||||
#endif
|
||||
|
||||
/* ========================================================================= */
|
||||
uLong ZEXPORT adler32(adler, buf, len)
|
||||
uLong adler;
|
||||
|
|
@ -30,19 +56,19 @@ uLong ZEXPORT adler32(adler, buf, len)
|
|||
if (buf == Z_NULL) return 1L;
|
||||
|
||||
while (len > 0) {
|
||||
k = len < NMAX ? len : NMAX;
|
||||
k = len < NMAX ? (int)len : NMAX;
|
||||
len -= k;
|
||||
while (k >= 16) {
|
||||
DO16(buf);
|
||||
buf += 16;
|
||||
buf += 16;
|
||||
k -= 16;
|
||||
}
|
||||
if (k != 0) do {
|
||||
s1 += *buf++;
|
||||
s2 += s1;
|
||||
s2 += s1;
|
||||
} while (--k);
|
||||
s1 %= BASE;
|
||||
s2 %= BASE;
|
||||
MOD(s1);
|
||||
MOD(s2);
|
||||
}
|
||||
return (s2 << 16) | s1;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -59,10 +59,10 @@ but saves time since there are both fewer insertions and fewer searches.
|
|||
|
||||
2.1 Introduction
|
||||
|
||||
The real question is, given a Huffman tree, how to decode fast. The most
|
||||
important realization is that shorter codes are much more common than
|
||||
longer codes, so pay attention to decoding the short codes fast, and let
|
||||
the long codes take longer to decode.
|
||||
The key question is how to represent a Huffman code (or any prefix code) so
|
||||
that you can decode fast. The most important characteristic is that shorter
|
||||
codes are much more common than longer codes, so pay attention to decoding the
|
||||
short codes fast, and let the long codes take longer to decode.
|
||||
|
||||
inflate() sets up a first level table that covers some number of bits of
|
||||
input less than the length of longest code. It gets that many bits from the
|
||||
|
|
@ -77,58 +77,54 @@ table took no time (and if you had infinite memory), then there would only
|
|||
be a first level table to cover all the way to the longest code. However,
|
||||
building the table ends up taking a lot longer for more bits since short
|
||||
codes are replicated many times in such a table. What inflate() does is
|
||||
simply to make the number of bits in the first table a variable, and set it
|
||||
for the maximum speed.
|
||||
simply to make the number of bits in the first table a variable, and then
|
||||
to set that variable for the maximum speed.
|
||||
|
||||
inflate() sends new trees relatively often, so it is possibly set for a
|
||||
smaller first level table than an application that has only one tree for
|
||||
all the data. For inflate, which has 286 possible codes for the
|
||||
literal/length tree, the size of the first table is nine bits. Also the
|
||||
distance trees have 30 possible values, and the size of the first table is
|
||||
six bits. Note that for each of those cases, the table ended up one bit
|
||||
longer than the ``average'' code length, i.e. the code length of an
|
||||
approximately flat code which would be a little more than eight bits for
|
||||
286 symbols and a little less than five bits for 30 symbols. It would be
|
||||
interesting to see if optimizing the first level table for other
|
||||
applications gave values within a bit or two of the flat code size.
|
||||
For inflate, which has 286 possible codes for the literal/length tree, the size
|
||||
of the first table is nine bits. Also the distance trees have 30 possible
|
||||
values, and the size of the first table is six bits. Note that for each of
|
||||
those cases, the table ended up one bit longer than the ``average'' code
|
||||
length, i.e. the code length of an approximately flat code which would be a
|
||||
little more than eight bits for 286 symbols and a little less than five bits
|
||||
for 30 symbols.
|
||||
|
||||
|
||||
2.2 More details on the inflate table lookup
|
||||
|
||||
Ok, you want to know what this cleverly obfuscated inflate tree actually
|
||||
looks like. You are correct that it's not a Huffman tree. It is simply a
|
||||
lookup table for the first, let's say, nine bits of a Huffman symbol. The
|
||||
symbol could be as short as one bit or as long as 15 bits. If a particular
|
||||
Ok, you want to know what this cleverly obfuscated inflate tree actually
|
||||
looks like. You are correct that it's not a Huffman tree. It is simply a
|
||||
lookup table for the first, let's say, nine bits of a Huffman symbol. The
|
||||
symbol could be as short as one bit or as long as 15 bits. If a particular
|
||||
symbol is shorter than nine bits, then that symbol's translation is duplicated
|
||||
in all those entries that start with that symbol's bits. For example, if the
|
||||
symbol is four bits, then it's duplicated 32 times in a nine-bit table. If a
|
||||
in all those entries that start with that symbol's bits. For example, if the
|
||||
symbol is four bits, then it's duplicated 32 times in a nine-bit table. If a
|
||||
symbol is nine bits long, it appears in the table once.
|
||||
|
||||
If the symbol is longer than nine bits, then that entry in the table points
|
||||
to another similar table for the remaining bits. Again, there are duplicated
|
||||
If the symbol is longer than nine bits, then that entry in the table points
|
||||
to another similar table for the remaining bits. Again, there are duplicated
|
||||
entries as needed. The idea is that most of the time the symbol will be short
|
||||
and there will only be one table look up. (That's whole idea behind data
|
||||
compression in the first place.) For the less frequent long symbols, there
|
||||
will be two lookups. If you had a compression method with really long
|
||||
symbols, you could have as many levels of lookups as is efficient. For
|
||||
and there will only be one table look up. (That's whole idea behind data
|
||||
compression in the first place.) For the less frequent long symbols, there
|
||||
will be two lookups. If you had a compression method with really long
|
||||
symbols, you could have as many levels of lookups as is efficient. For
|
||||
inflate, two is enough.
|
||||
|
||||
So a table entry either points to another table (in which case nine bits in
|
||||
the above example are gobbled), or it contains the translation for the symbol
|
||||
and the number of bits to gobble. Then you start again with the next
|
||||
So a table entry either points to another table (in which case nine bits in
|
||||
the above example are gobbled), or it contains the translation for the symbol
|
||||
and the number of bits to gobble. Then you start again with the next
|
||||
ungobbled bit.
|
||||
|
||||
You may wonder: why not just have one lookup table for how ever many bits the
|
||||
longest symbol is? The reason is that if you do that, you end up spending
|
||||
more time filling in duplicate symbol entries than you do actually decoding.
|
||||
At least for deflate's output that generates new trees every several 10's of
|
||||
kbytes. You can imagine that filling in a 2^15 entry table for a 15-bit code
|
||||
would take too long if you're only decoding several thousand symbols. At the
|
||||
You may wonder: why not just have one lookup table for how ever many bits the
|
||||
longest symbol is? The reason is that if you do that, you end up spending
|
||||
more time filling in duplicate symbol entries than you do actually decoding.
|
||||
At least for deflate's output that generates new trees every several 10's of
|
||||
kbytes. You can imagine that filling in a 2^15 entry table for a 15-bit code
|
||||
would take too long if you're only decoding several thousand symbols. At the
|
||||
other extreme, you could make a new table for every bit in the code. In fact,
|
||||
that's essentially a Huffman tree. But then you spend two much time
|
||||
that's essentially a Huffman tree. But then you spend two much time
|
||||
traversing the tree while decoding, even for short symbols.
|
||||
|
||||
So the number of bits for the first lookup table is a trade of the time to
|
||||
So the number of bits for the first lookup table is a trade of the time to
|
||||
fill out the table vs. the time spent looking at the second level and above of
|
||||
the table.
|
||||
|
||||
|
|
@ -158,7 +154,7 @@ Let's make the first table three bits long (eight entries):
|
|||
110: -> table X (gobble 3 bits)
|
||||
111: -> table Y (gobble 3 bits)
|
||||
|
||||
Each entry is what the bits decode to and how many bits that is, i.e. how
|
||||
Each entry is what the bits decode as and how many bits that is, i.e. how
|
||||
many bits to gobble. Or the entry points to another table, with the number of
|
||||
bits to gobble implicit in the size of the table.
|
||||
|
||||
|
|
@ -170,7 +166,7 @@ long:
|
|||
10: D,2
|
||||
11: E,2
|
||||
|
||||
Table Y is three bits long since the longest code starting with 111 is six
|
||||
Table Y is three bits long since the longest code starting with 111 is six
|
||||
bits long:
|
||||
|
||||
000: F,2
|
||||
|
|
@ -182,20 +178,20 @@ bits long:
|
|||
110: I,3
|
||||
111: J,3
|
||||
|
||||
So what we have here are three tables with a total of 20 entries that had to
|
||||
be constructed. That's compared to 64 entries for a single table. Or
|
||||
compared to 16 entries for a Huffman tree (six two entry tables and one four
|
||||
entry table). Assuming that the code ideally represents the probability of
|
||||
So what we have here are three tables with a total of 20 entries that had to
|
||||
be constructed. That's compared to 64 entries for a single table. Or
|
||||
compared to 16 entries for a Huffman tree (six two entry tables and one four
|
||||
entry table). Assuming that the code ideally represents the probability of
|
||||
the symbols, it takes on the average 1.25 lookups per symbol. That's compared
|
||||
to one lookup for the single table, or 1.66 lookups per symbol for the
|
||||
to one lookup for the single table, or 1.66 lookups per symbol for the
|
||||
Huffman tree.
|
||||
|
||||
There, I think that gives you a picture of what's going on. For inflate, the
|
||||
meaning of a particular symbol is often more than just a letter. It can be a
|
||||
byte (a "literal"), or it can be either a length or a distance which
|
||||
indicates a base value and a number of bits to fetch after the code that is
|
||||
added to the base value. Or it might be the special end-of-block code. The
|
||||
data structures created in inftrees.c try to encode all that information
|
||||
There, I think that gives you a picture of what's going on. For inflate, the
|
||||
meaning of a particular symbol is often more than just a letter. It can be a
|
||||
byte (a "literal"), or it can be either a length or a distance which
|
||||
indicates a base value and a number of bits to fetch after the code that is
|
||||
added to the base value. Or it might be the special end-of-block code. The
|
||||
data structures created in inftrees.c try to encode all that information
|
||||
compactly in the tables.
|
||||
|
||||
|
||||
|
|
@ -210,4 +206,4 @@ Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3,
|
|||
pp. 337-343.
|
||||
|
||||
``DEFLATE Compressed Data Format Specification'' available in
|
||||
ftp://ds.internic.net/rfc/rfc1951.txt
|
||||
http://www.ietf.org/rfc/rfc1951.txt
|
||||
|
|
|
|||
|
|
@ -1,10 +1,11 @@
|
|||
/* compress.c -- compress a memory buffer
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#define ZLIB_INTERNAL
|
||||
#include "zlib.h"
|
||||
|
||||
/* ===========================================================================
|
||||
|
|
@ -66,3 +67,13 @@ int ZEXPORT compress (dest, destLen, source, sourceLen)
|
|||
{
|
||||
return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
If the default memLevel or windowBits for deflateInit() is changed, then
|
||||
this function needs to be updated.
|
||||
*/
|
||||
uLong ZEXPORT compressBound (sourceLen)
|
||||
uLong sourceLen;
|
||||
{
|
||||
return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
|
||||
}
|
||||
|
|
|
|||
355
lib/libz/crc32.c
355
lib/libz/crc32.c
|
|
@ -1,22 +1,72 @@
|
|||
/* crc32.c -- compute the CRC-32 of a data stream
|
||||
* Copyright (C) 1995-2002 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*
|
||||
* Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
|
||||
* CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
|
||||
* tables for updating the shift register in one step with three exclusive-ors
|
||||
* instead of four steps with four exclusive-ors. This results about a factor
|
||||
* of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#include "zlib.h"
|
||||
#ifdef MAKECRCH
|
||||
# include <stdio.h>
|
||||
# ifndef DYNAMIC_CRC_TABLE
|
||||
# define DYNAMIC_CRC_TABLE
|
||||
# endif /* !DYNAMIC_CRC_TABLE */
|
||||
#endif /* MAKECRCH */
|
||||
|
||||
#include "zutil.h" /* for STDC and FAR definitions */
|
||||
|
||||
#define local static
|
||||
|
||||
/* Find a four-byte integer type for crc32_little() and crc32_big(). */
|
||||
#ifndef NOBYFOUR
|
||||
# ifdef STDC /* need ANSI C limits.h to determine sizes */
|
||||
# include <limits.h>
|
||||
# define BYFOUR
|
||||
# if (UINT_MAX == 0xffffffffUL)
|
||||
typedef unsigned int u4;
|
||||
# else
|
||||
# if (ULONG_MAX == 0xffffffffUL)
|
||||
typedef unsigned long u4;
|
||||
# else
|
||||
# if (USHRT_MAX == 0xffffffffUL)
|
||||
typedef unsigned short u4;
|
||||
# else
|
||||
# undef BYFOUR /* can't find a four-byte integer type! */
|
||||
# endif
|
||||
# endif
|
||||
# endif
|
||||
# endif /* STDC */
|
||||
#endif /* !NOBYFOUR */
|
||||
|
||||
/* Definitions for doing the crc four data bytes at a time. */
|
||||
#ifdef BYFOUR
|
||||
# define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
|
||||
(((w)&0xff00)<<8)+(((w)&0xff)<<24))
|
||||
local unsigned long crc32_little OF((unsigned long,
|
||||
const unsigned char FAR *, unsigned));
|
||||
local unsigned long crc32_big OF((unsigned long,
|
||||
const unsigned char FAR *, unsigned));
|
||||
# define TBLS 8
|
||||
#else
|
||||
# define TBLS 1
|
||||
#endif /* BYFOUR */
|
||||
|
||||
#ifdef DYNAMIC_CRC_TABLE
|
||||
|
||||
local int crc_table_empty = 1;
|
||||
local uLongf crc_table[256];
|
||||
local unsigned long FAR crc_table[TBLS][256];
|
||||
local void make_crc_table OF((void));
|
||||
#ifdef MAKECRCH
|
||||
local void write_table OF((FILE *, const unsigned long FAR *));
|
||||
#endif /* MAKECRCH */
|
||||
|
||||
/*
|
||||
Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
|
||||
Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
|
||||
x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
|
||||
|
||||
Polynomials over GF(2) are represented in binary, one bit per coefficient,
|
||||
|
|
@ -35,128 +85,227 @@ local void make_crc_table OF((void));
|
|||
out is a one). We start with the highest power (least significant bit) of
|
||||
q and repeat for all eight bits of q.
|
||||
|
||||
The table is simply the CRC of all possible eight bit values. This is all
|
||||
the information needed to generate CRC's on data a byte at a time for all
|
||||
combinations of CRC register values and incoming bytes.
|
||||
The first table is simply the CRC of all possible eight bit values. This is
|
||||
all the information needed to generate CRCs on data a byte at a time for all
|
||||
combinations of CRC register values and incoming bytes. The remaining tables
|
||||
allow for word-at-a-time CRC calculation for both big-endian and little-
|
||||
endian machines, where a word is four bytes.
|
||||
*/
|
||||
local void make_crc_table()
|
||||
{
|
||||
uLong c;
|
||||
int n, k;
|
||||
uLong poly; /* polynomial exclusive-or pattern */
|
||||
/* terms of polynomial defining this crc (except x^32): */
|
||||
static const Byte p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
|
||||
unsigned long c;
|
||||
int n, k;
|
||||
unsigned long poly; /* polynomial exclusive-or pattern */
|
||||
/* terms of polynomial defining this crc (except x^32): */
|
||||
static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
|
||||
|
||||
/* make exclusive-or pattern from polynomial (0xedb88320UL) */
|
||||
poly = 0UL;
|
||||
for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
|
||||
poly |= 1UL << (31 - p[n]);
|
||||
|
||||
/* generate a crc for every 8-bit value */
|
||||
for (n = 0; n < 256; n++) {
|
||||
c = (unsigned long)n;
|
||||
for (k = 0; k < 8; k++)
|
||||
c = c & 1 ? poly ^ (c >> 1) : c >> 1;
|
||||
crc_table[0][n] = c;
|
||||
}
|
||||
|
||||
#ifdef BYFOUR
|
||||
/* generate crc for each value followed by one, two, and three zeros, and
|
||||
then the byte reversal of those as well as the first table */
|
||||
for (n = 0; n < 256; n++) {
|
||||
c = crc_table[0][n];
|
||||
crc_table[4][n] = REV(c);
|
||||
for (k = 1; k < 4; k++) {
|
||||
c = crc_table[0][c & 0xff] ^ (c >> 8);
|
||||
crc_table[k][n] = c;
|
||||
crc_table[k + 4][n] = REV(c);
|
||||
}
|
||||
}
|
||||
#endif /* BYFOUR */
|
||||
|
||||
/* make exclusive-or pattern from polynomial (0xedb88320L) */
|
||||
poly = 0L;
|
||||
for (n = 0; n < sizeof(p)/sizeof(Byte); n++)
|
||||
poly |= 1L << (31 - p[n]);
|
||||
|
||||
for (n = 0; n < 256; n++)
|
||||
{
|
||||
c = (uLong)n;
|
||||
for (k = 0; k < 8; k++)
|
||||
c = c & 1 ? poly ^ (c >> 1) : c >> 1;
|
||||
crc_table[n] = c;
|
||||
}
|
||||
crc_table_empty = 0;
|
||||
|
||||
#ifdef MAKECRCH
|
||||
/* write out CRC tables to crc32.h */
|
||||
{
|
||||
FILE *out;
|
||||
|
||||
out = fopen("crc32.h", "w");
|
||||
if (out == NULL) return;
|
||||
fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
|
||||
fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
|
||||
fprintf(out, "local const unsigned long FAR ");
|
||||
fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
|
||||
write_table(out, crc_table[0]);
|
||||
# ifdef BYFOUR
|
||||
fprintf(out, "#ifdef BYFOUR\n");
|
||||
for (k = 1; k < 8; k++) {
|
||||
fprintf(out, " },\n {\n");
|
||||
write_table(out, crc_table[k]);
|
||||
}
|
||||
fprintf(out, "#endif\n");
|
||||
# endif /* BYFOUR */
|
||||
fprintf(out, " }\n};\n");
|
||||
fclose(out);
|
||||
}
|
||||
#endif /* MAKECRCH */
|
||||
}
|
||||
#else
|
||||
|
||||
#ifdef MAKECRCH
|
||||
local void write_table(out, table)
|
||||
FILE *out;
|
||||
const unsigned long FAR *table;
|
||||
{
|
||||
int n;
|
||||
|
||||
for (n = 0; n < 256; n++)
|
||||
fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n],
|
||||
n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
|
||||
}
|
||||
#endif /* MAKECRCH */
|
||||
|
||||
#else /* !DYNAMIC_CRC_TABLE */
|
||||
/* ========================================================================
|
||||
* Table of CRC-32's of all single-byte values (made by make_crc_table)
|
||||
* Tables of CRC-32s of all single-byte values, made by make_crc_table().
|
||||
*/
|
||||
local const uLongf crc_table[256] = {
|
||||
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
|
||||
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
|
||||
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
|
||||
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
|
||||
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
|
||||
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
|
||||
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
|
||||
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
|
||||
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
|
||||
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
|
||||
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
|
||||
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
|
||||
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
|
||||
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
|
||||
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
|
||||
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
|
||||
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
|
||||
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
|
||||
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
|
||||
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
|
||||
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
|
||||
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
|
||||
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
|
||||
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
|
||||
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
|
||||
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
|
||||
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
|
||||
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
|
||||
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
|
||||
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
|
||||
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
|
||||
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
|
||||
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
|
||||
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
|
||||
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
|
||||
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
|
||||
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
|
||||
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
|
||||
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
|
||||
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
|
||||
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
|
||||
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
|
||||
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
|
||||
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
|
||||
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
|
||||
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
|
||||
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
|
||||
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
|
||||
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
|
||||
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
|
||||
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
|
||||
0x2d02ef8dL
|
||||
};
|
||||
#endif
|
||||
#include "crc32.h"
|
||||
#endif /* DYNAMIC_CRC_TABLE */
|
||||
|
||||
/* =========================================================================
|
||||
* This function can be used by asm versions of crc32()
|
||||
*/
|
||||
const uLongf * ZEXPORT get_crc_table()
|
||||
const unsigned long FAR * ZEXPORT get_crc_table()
|
||||
{
|
||||
#ifdef DYNAMIC_CRC_TABLE
|
||||
if (crc_table_empty) make_crc_table();
|
||||
#endif
|
||||
return (const uLongf *)crc_table;
|
||||
#endif /* DYNAMIC_CRC_TABLE */
|
||||
return (const unsigned long FAR *)crc_table;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
|
||||
#define DO2(buf) DO1(buf); DO1(buf);
|
||||
#define DO4(buf) DO2(buf); DO2(buf);
|
||||
#define DO8(buf) DO4(buf); DO4(buf);
|
||||
#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
|
||||
#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
|
||||
|
||||
/* ========================================================================= */
|
||||
uLong ZEXPORT crc32(crc, buf, len)
|
||||
uLong crc;
|
||||
const Bytef *buf;
|
||||
uInt len;
|
||||
unsigned long ZEXPORT crc32(crc, buf, len)
|
||||
unsigned long crc;
|
||||
const unsigned char FAR *buf;
|
||||
unsigned len;
|
||||
{
|
||||
if (buf == Z_NULL) return 0L;
|
||||
if (buf == Z_NULL) return 0UL;
|
||||
|
||||
#ifdef DYNAMIC_CRC_TABLE
|
||||
if (crc_table_empty)
|
||||
make_crc_table();
|
||||
#endif
|
||||
crc = crc ^ 0xffffffffL;
|
||||
while (len >= 8)
|
||||
{
|
||||
DO8(buf);
|
||||
len -= 8;
|
||||
make_crc_table();
|
||||
#endif /* DYNAMIC_CRC_TABLE */
|
||||
|
||||
#ifdef BYFOUR
|
||||
if (sizeof(void *) == sizeof(ptrdiff_t)) {
|
||||
u4 endian;
|
||||
|
||||
endian = 1;
|
||||
if (*((unsigned char *)(&endian)))
|
||||
return crc32_little(crc, buf, len);
|
||||
else
|
||||
return crc32_big(crc, buf, len);
|
||||
}
|
||||
#endif /* BYFOUR */
|
||||
crc = crc ^ 0xffffffffUL;
|
||||
while (len >= 8) {
|
||||
DO8;
|
||||
len -= 8;
|
||||
}
|
||||
if (len) do {
|
||||
DO1(buf);
|
||||
DO1;
|
||||
} while (--len);
|
||||
return crc ^ 0xffffffffL;
|
||||
return crc ^ 0xffffffffUL;
|
||||
}
|
||||
|
||||
#ifdef BYFOUR
|
||||
|
||||
/* ========================================================================= */
|
||||
#define DOLIT4 c ^= *buf4++; \
|
||||
c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
|
||||
crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
|
||||
#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
|
||||
|
||||
/* ========================================================================= */
|
||||
local unsigned long crc32_little(crc, buf, len)
|
||||
unsigned long crc;
|
||||
const unsigned char FAR *buf;
|
||||
unsigned len;
|
||||
{
|
||||
register u4 c;
|
||||
register const u4 FAR *buf4;
|
||||
|
||||
c = (u4)crc;
|
||||
c = ~c;
|
||||
while (len && ((ptrdiff_t)buf & 3)) {
|
||||
c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
|
||||
len--;
|
||||
}
|
||||
|
||||
buf4 = (const u4 FAR *)buf;
|
||||
while (len >= 32) {
|
||||
DOLIT32;
|
||||
len -= 32;
|
||||
}
|
||||
while (len >= 4) {
|
||||
DOLIT4;
|
||||
len -= 4;
|
||||
}
|
||||
buf = (const unsigned char FAR *)buf4;
|
||||
|
||||
if (len) do {
|
||||
c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
|
||||
} while (--len);
|
||||
c = ~c;
|
||||
return (unsigned long)c;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
#define DOBIG4 c ^= *++buf4; \
|
||||
c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
|
||||
crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
|
||||
#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
|
||||
|
||||
/* ========================================================================= */
|
||||
local unsigned long crc32_big(crc, buf, len)
|
||||
unsigned long crc;
|
||||
const unsigned char FAR *buf;
|
||||
unsigned len;
|
||||
{
|
||||
register u4 c;
|
||||
register const u4 FAR *buf4;
|
||||
|
||||
c = REV((u4)crc);
|
||||
c = ~c;
|
||||
while (len && ((ptrdiff_t)buf & 3)) {
|
||||
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
|
||||
len--;
|
||||
}
|
||||
|
||||
buf4 = (const u4 FAR *)buf;
|
||||
buf4--;
|
||||
while (len >= 32) {
|
||||
DOBIG32;
|
||||
len -= 32;
|
||||
}
|
||||
while (len >= 4) {
|
||||
DOBIG4;
|
||||
len -= 4;
|
||||
}
|
||||
buf4++;
|
||||
buf = (const unsigned char FAR *)buf4;
|
||||
|
||||
if (len) do {
|
||||
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
|
||||
} while (--len);
|
||||
c = ~c;
|
||||
return (unsigned long)(REV(c));
|
||||
}
|
||||
|
||||
#endif /* BYFOUR */
|
||||
|
|
|
|||
441
lib/libz/crc32.h
Normal file
441
lib/libz/crc32.h
Normal file
|
|
@ -0,0 +1,441 @@
|
|||
/* crc32.h -- tables for rapid CRC calculation
|
||||
* Generated automatically by crc32.c
|
||||
*/
|
||||
|
||||
local const unsigned long FAR crc_table[TBLS][256] =
|
||||
{
|
||||
{
|
||||
0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
|
||||
0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
|
||||
0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
|
||||
0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
|
||||
0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
|
||||
0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
|
||||
0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
|
||||
0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
|
||||
0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
|
||||
0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
|
||||
0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
|
||||
0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
|
||||
0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
|
||||
0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
|
||||
0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
|
||||
0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
|
||||
0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
|
||||
0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
|
||||
0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
|
||||
0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
|
||||
0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
|
||||
0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
|
||||
0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
|
||||
0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
|
||||
0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
|
||||
0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
|
||||
0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
|
||||
0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
|
||||
0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
|
||||
0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
|
||||
0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
|
||||
0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
|
||||
0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
|
||||
0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
|
||||
0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
|
||||
0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
|
||||
0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
|
||||
0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
|
||||
0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
|
||||
0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
|
||||
0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
|
||||
0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
|
||||
0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
|
||||
0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
|
||||
0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
|
||||
0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
|
||||
0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
|
||||
0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
|
||||
0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
|
||||
0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
|
||||
0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
|
||||
0x2d02ef8dUL
|
||||
#ifdef BYFOUR
|
||||
},
|
||||
{
|
||||
0x00000000UL, 0x191b3141UL, 0x32366282UL, 0x2b2d53c3UL, 0x646cc504UL,
|
||||
0x7d77f445UL, 0x565aa786UL, 0x4f4196c7UL, 0xc8d98a08UL, 0xd1c2bb49UL,
|
||||
0xfaefe88aUL, 0xe3f4d9cbUL, 0xacb54f0cUL, 0xb5ae7e4dUL, 0x9e832d8eUL,
|
||||
0x87981ccfUL, 0x4ac21251UL, 0x53d92310UL, 0x78f470d3UL, 0x61ef4192UL,
|
||||
0x2eaed755UL, 0x37b5e614UL, 0x1c98b5d7UL, 0x05838496UL, 0x821b9859UL,
|
||||
0x9b00a918UL, 0xb02dfadbUL, 0xa936cb9aUL, 0xe6775d5dUL, 0xff6c6c1cUL,
|
||||
0xd4413fdfUL, 0xcd5a0e9eUL, 0x958424a2UL, 0x8c9f15e3UL, 0xa7b24620UL,
|
||||
0xbea97761UL, 0xf1e8e1a6UL, 0xe8f3d0e7UL, 0xc3de8324UL, 0xdac5b265UL,
|
||||
0x5d5daeaaUL, 0x44469febUL, 0x6f6bcc28UL, 0x7670fd69UL, 0x39316baeUL,
|
||||
0x202a5aefUL, 0x0b07092cUL, 0x121c386dUL, 0xdf4636f3UL, 0xc65d07b2UL,
|
||||
0xed705471UL, 0xf46b6530UL, 0xbb2af3f7UL, 0xa231c2b6UL, 0x891c9175UL,
|
||||
0x9007a034UL, 0x179fbcfbUL, 0x0e848dbaUL, 0x25a9de79UL, 0x3cb2ef38UL,
|
||||
0x73f379ffUL, 0x6ae848beUL, 0x41c51b7dUL, 0x58de2a3cUL, 0xf0794f05UL,
|
||||
0xe9627e44UL, 0xc24f2d87UL, 0xdb541cc6UL, 0x94158a01UL, 0x8d0ebb40UL,
|
||||
0xa623e883UL, 0xbf38d9c2UL, 0x38a0c50dUL, 0x21bbf44cUL, 0x0a96a78fUL,
|
||||
0x138d96ceUL, 0x5ccc0009UL, 0x45d73148UL, 0x6efa628bUL, 0x77e153caUL,
|
||||
0xbabb5d54UL, 0xa3a06c15UL, 0x888d3fd6UL, 0x91960e97UL, 0xded79850UL,
|
||||
0xc7cca911UL, 0xece1fad2UL, 0xf5facb93UL, 0x7262d75cUL, 0x6b79e61dUL,
|
||||
0x4054b5deUL, 0x594f849fUL, 0x160e1258UL, 0x0f152319UL, 0x243870daUL,
|
||||
0x3d23419bUL, 0x65fd6ba7UL, 0x7ce65ae6UL, 0x57cb0925UL, 0x4ed03864UL,
|
||||
0x0191aea3UL, 0x188a9fe2UL, 0x33a7cc21UL, 0x2abcfd60UL, 0xad24e1afUL,
|
||||
0xb43fd0eeUL, 0x9f12832dUL, 0x8609b26cUL, 0xc94824abUL, 0xd05315eaUL,
|
||||
0xfb7e4629UL, 0xe2657768UL, 0x2f3f79f6UL, 0x362448b7UL, 0x1d091b74UL,
|
||||
0x04122a35UL, 0x4b53bcf2UL, 0x52488db3UL, 0x7965de70UL, 0x607eef31UL,
|
||||
0xe7e6f3feUL, 0xfefdc2bfUL, 0xd5d0917cUL, 0xcccba03dUL, 0x838a36faUL,
|
||||
0x9a9107bbUL, 0xb1bc5478UL, 0xa8a76539UL, 0x3b83984bUL, 0x2298a90aUL,
|
||||
0x09b5fac9UL, 0x10aecb88UL, 0x5fef5d4fUL, 0x46f46c0eUL, 0x6dd93fcdUL,
|
||||
0x74c20e8cUL, 0xf35a1243UL, 0xea412302UL, 0xc16c70c1UL, 0xd8774180UL,
|
||||
0x9736d747UL, 0x8e2de606UL, 0xa500b5c5UL, 0xbc1b8484UL, 0x71418a1aUL,
|
||||
0x685abb5bUL, 0x4377e898UL, 0x5a6cd9d9UL, 0x152d4f1eUL, 0x0c367e5fUL,
|
||||
0x271b2d9cUL, 0x3e001cddUL, 0xb9980012UL, 0xa0833153UL, 0x8bae6290UL,
|
||||
0x92b553d1UL, 0xddf4c516UL, 0xc4eff457UL, 0xefc2a794UL, 0xf6d996d5UL,
|
||||
0xae07bce9UL, 0xb71c8da8UL, 0x9c31de6bUL, 0x852aef2aUL, 0xca6b79edUL,
|
||||
0xd37048acUL, 0xf85d1b6fUL, 0xe1462a2eUL, 0x66de36e1UL, 0x7fc507a0UL,
|
||||
0x54e85463UL, 0x4df36522UL, 0x02b2f3e5UL, 0x1ba9c2a4UL, 0x30849167UL,
|
||||
0x299fa026UL, 0xe4c5aeb8UL, 0xfdde9ff9UL, 0xd6f3cc3aUL, 0xcfe8fd7bUL,
|
||||
0x80a96bbcUL, 0x99b25afdUL, 0xb29f093eUL, 0xab84387fUL, 0x2c1c24b0UL,
|
||||
0x350715f1UL, 0x1e2a4632UL, 0x07317773UL, 0x4870e1b4UL, 0x516bd0f5UL,
|
||||
0x7a468336UL, 0x635db277UL, 0xcbfad74eUL, 0xd2e1e60fUL, 0xf9ccb5ccUL,
|
||||
0xe0d7848dUL, 0xaf96124aUL, 0xb68d230bUL, 0x9da070c8UL, 0x84bb4189UL,
|
||||
0x03235d46UL, 0x1a386c07UL, 0x31153fc4UL, 0x280e0e85UL, 0x674f9842UL,
|
||||
0x7e54a903UL, 0x5579fac0UL, 0x4c62cb81UL, 0x8138c51fUL, 0x9823f45eUL,
|
||||
0xb30ea79dUL, 0xaa1596dcUL, 0xe554001bUL, 0xfc4f315aUL, 0xd7626299UL,
|
||||
0xce7953d8UL, 0x49e14f17UL, 0x50fa7e56UL, 0x7bd72d95UL, 0x62cc1cd4UL,
|
||||
0x2d8d8a13UL, 0x3496bb52UL, 0x1fbbe891UL, 0x06a0d9d0UL, 0x5e7ef3ecUL,
|
||||
0x4765c2adUL, 0x6c48916eUL, 0x7553a02fUL, 0x3a1236e8UL, 0x230907a9UL,
|
||||
0x0824546aUL, 0x113f652bUL, 0x96a779e4UL, 0x8fbc48a5UL, 0xa4911b66UL,
|
||||
0xbd8a2a27UL, 0xf2cbbce0UL, 0xebd08da1UL, 0xc0fdde62UL, 0xd9e6ef23UL,
|
||||
0x14bce1bdUL, 0x0da7d0fcUL, 0x268a833fUL, 0x3f91b27eUL, 0x70d024b9UL,
|
||||
0x69cb15f8UL, 0x42e6463bUL, 0x5bfd777aUL, 0xdc656bb5UL, 0xc57e5af4UL,
|
||||
0xee530937UL, 0xf7483876UL, 0xb809aeb1UL, 0xa1129ff0UL, 0x8a3fcc33UL,
|
||||
0x9324fd72UL
|
||||
},
|
||||
{
|
||||
0x00000000UL, 0x01c26a37UL, 0x0384d46eUL, 0x0246be59UL, 0x0709a8dcUL,
|
||||
0x06cbc2ebUL, 0x048d7cb2UL, 0x054f1685UL, 0x0e1351b8UL, 0x0fd13b8fUL,
|
||||
0x0d9785d6UL, 0x0c55efe1UL, 0x091af964UL, 0x08d89353UL, 0x0a9e2d0aUL,
|
||||
0x0b5c473dUL, 0x1c26a370UL, 0x1de4c947UL, 0x1fa2771eUL, 0x1e601d29UL,
|
||||
0x1b2f0bacUL, 0x1aed619bUL, 0x18abdfc2UL, 0x1969b5f5UL, 0x1235f2c8UL,
|
||||
0x13f798ffUL, 0x11b126a6UL, 0x10734c91UL, 0x153c5a14UL, 0x14fe3023UL,
|
||||
0x16b88e7aUL, 0x177ae44dUL, 0x384d46e0UL, 0x398f2cd7UL, 0x3bc9928eUL,
|
||||
0x3a0bf8b9UL, 0x3f44ee3cUL, 0x3e86840bUL, 0x3cc03a52UL, 0x3d025065UL,
|
||||
0x365e1758UL, 0x379c7d6fUL, 0x35dac336UL, 0x3418a901UL, 0x3157bf84UL,
|
||||
0x3095d5b3UL, 0x32d36beaUL, 0x331101ddUL, 0x246be590UL, 0x25a98fa7UL,
|
||||
0x27ef31feUL, 0x262d5bc9UL, 0x23624d4cUL, 0x22a0277bUL, 0x20e69922UL,
|
||||
0x2124f315UL, 0x2a78b428UL, 0x2bbade1fUL, 0x29fc6046UL, 0x283e0a71UL,
|
||||
0x2d711cf4UL, 0x2cb376c3UL, 0x2ef5c89aUL, 0x2f37a2adUL, 0x709a8dc0UL,
|
||||
0x7158e7f7UL, 0x731e59aeUL, 0x72dc3399UL, 0x7793251cUL, 0x76514f2bUL,
|
||||
0x7417f172UL, 0x75d59b45UL, 0x7e89dc78UL, 0x7f4bb64fUL, 0x7d0d0816UL,
|
||||
0x7ccf6221UL, 0x798074a4UL, 0x78421e93UL, 0x7a04a0caUL, 0x7bc6cafdUL,
|
||||
0x6cbc2eb0UL, 0x6d7e4487UL, 0x6f38fadeUL, 0x6efa90e9UL, 0x6bb5866cUL,
|
||||
0x6a77ec5bUL, 0x68315202UL, 0x69f33835UL, 0x62af7f08UL, 0x636d153fUL,
|
||||
0x612bab66UL, 0x60e9c151UL, 0x65a6d7d4UL, 0x6464bde3UL, 0x662203baUL,
|
||||
0x67e0698dUL, 0x48d7cb20UL, 0x4915a117UL, 0x4b531f4eUL, 0x4a917579UL,
|
||||
0x4fde63fcUL, 0x4e1c09cbUL, 0x4c5ab792UL, 0x4d98dda5UL, 0x46c49a98UL,
|
||||
0x4706f0afUL, 0x45404ef6UL, 0x448224c1UL, 0x41cd3244UL, 0x400f5873UL,
|
||||
0x4249e62aUL, 0x438b8c1dUL, 0x54f16850UL, 0x55330267UL, 0x5775bc3eUL,
|
||||
0x56b7d609UL, 0x53f8c08cUL, 0x523aaabbUL, 0x507c14e2UL, 0x51be7ed5UL,
|
||||
0x5ae239e8UL, 0x5b2053dfUL, 0x5966ed86UL, 0x58a487b1UL, 0x5deb9134UL,
|
||||
0x5c29fb03UL, 0x5e6f455aUL, 0x5fad2f6dUL, 0xe1351b80UL, 0xe0f771b7UL,
|
||||
0xe2b1cfeeUL, 0xe373a5d9UL, 0xe63cb35cUL, 0xe7fed96bUL, 0xe5b86732UL,
|
||||
0xe47a0d05UL, 0xef264a38UL, 0xeee4200fUL, 0xeca29e56UL, 0xed60f461UL,
|
||||
0xe82fe2e4UL, 0xe9ed88d3UL, 0xebab368aUL, 0xea695cbdUL, 0xfd13b8f0UL,
|
||||
0xfcd1d2c7UL, 0xfe976c9eUL, 0xff5506a9UL, 0xfa1a102cUL, 0xfbd87a1bUL,
|
||||
0xf99ec442UL, 0xf85cae75UL, 0xf300e948UL, 0xf2c2837fUL, 0xf0843d26UL,
|
||||
0xf1465711UL, 0xf4094194UL, 0xf5cb2ba3UL, 0xf78d95faUL, 0xf64fffcdUL,
|
||||
0xd9785d60UL, 0xd8ba3757UL, 0xdafc890eUL, 0xdb3ee339UL, 0xde71f5bcUL,
|
||||
0xdfb39f8bUL, 0xddf521d2UL, 0xdc374be5UL, 0xd76b0cd8UL, 0xd6a966efUL,
|
||||
0xd4efd8b6UL, 0xd52db281UL, 0xd062a404UL, 0xd1a0ce33UL, 0xd3e6706aUL,
|
||||
0xd2241a5dUL, 0xc55efe10UL, 0xc49c9427UL, 0xc6da2a7eUL, 0xc7184049UL,
|
||||
0xc25756ccUL, 0xc3953cfbUL, 0xc1d382a2UL, 0xc011e895UL, 0xcb4dafa8UL,
|
||||
0xca8fc59fUL, 0xc8c97bc6UL, 0xc90b11f1UL, 0xcc440774UL, 0xcd866d43UL,
|
||||
0xcfc0d31aUL, 0xce02b92dUL, 0x91af9640UL, 0x906dfc77UL, 0x922b422eUL,
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0x93e92819UL, 0x96a63e9cUL, 0x976454abUL, 0x9522eaf2UL, 0x94e080c5UL,
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0x9fbcc7f8UL, 0x9e7eadcfUL, 0x9c381396UL, 0x9dfa79a1UL, 0x98b56f24UL,
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0x99770513UL, 0x9b31bb4aUL, 0x9af3d17dUL, 0x8d893530UL, 0x8c4b5f07UL,
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0x8e0de15eUL, 0x8fcf8b69UL, 0x8a809decUL, 0x8b42f7dbUL, 0x89044982UL,
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0x88c623b5UL, 0x839a6488UL, 0x82580ebfUL, 0x801eb0e6UL, 0x81dcdad1UL,
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0x8493cc54UL, 0x8551a663UL, 0x8717183aUL, 0x86d5720dUL, 0xa9e2d0a0UL,
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0xa820ba97UL, 0xaa6604ceUL, 0xaba46ef9UL, 0xaeeb787cUL, 0xaf29124bUL,
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0xad6fac12UL, 0xacadc625UL, 0xa7f18118UL, 0xa633eb2fUL, 0xa4755576UL,
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0xa5b73f41UL, 0xa0f829c4UL, 0xa13a43f3UL, 0xa37cfdaaUL, 0xa2be979dUL,
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0xb5c473d0UL, 0xb40619e7UL, 0xb640a7beUL, 0xb782cd89UL, 0xb2cddb0cUL,
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0xb30fb13bUL, 0xb1490f62UL, 0xb08b6555UL, 0xbbd72268UL, 0xba15485fUL,
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0xb853f606UL, 0xb9919c31UL, 0xbcde8ab4UL, 0xbd1ce083UL, 0xbf5a5edaUL,
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0xbe9834edUL
|
||||
},
|
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{
|
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0x00000000UL, 0xb8bc6765UL, 0xaa09c88bUL, 0x12b5afeeUL, 0x8f629757UL,
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0x37def032UL, 0x256b5fdcUL, 0x9dd738b9UL, 0xc5b428efUL, 0x7d084f8aUL,
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0x6fbde064UL, 0xd7018701UL, 0x4ad6bfb8UL, 0xf26ad8ddUL, 0xe0df7733UL,
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0x58631056UL, 0x5019579fUL, 0xe8a530faUL, 0xfa109f14UL, 0x42acf871UL,
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0xdf7bc0c8UL, 0x67c7a7adUL, 0x75720843UL, 0xcdce6f26UL, 0x95ad7f70UL,
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0x2d111815UL, 0x3fa4b7fbUL, 0x8718d09eUL, 0x1acfe827UL, 0xa2738f42UL,
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0xb0c620acUL, 0x087a47c9UL, 0xa032af3eUL, 0x188ec85bUL, 0x0a3b67b5UL,
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0xb28700d0UL, 0x2f503869UL, 0x97ec5f0cUL, 0x8559f0e2UL, 0x3de59787UL,
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0x658687d1UL, 0xdd3ae0b4UL, 0xcf8f4f5aUL, 0x7733283fUL, 0xeae41086UL,
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0x525877e3UL, 0x40edd80dUL, 0xf851bf68UL, 0xf02bf8a1UL, 0x48979fc4UL,
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0x5a22302aUL, 0xe29e574fUL, 0x7f496ff6UL, 0xc7f50893UL, 0xd540a77dUL,
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0x6dfcc018UL, 0x359fd04eUL, 0x8d23b72bUL, 0x9f9618c5UL, 0x272a7fa0UL,
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0xbafd4719UL, 0x0241207cUL, 0x10f48f92UL, 0xa848e8f7UL, 0x9b14583dUL,
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0x23a83f58UL, 0x311d90b6UL, 0x89a1f7d3UL, 0x1476cf6aUL, 0xaccaa80fUL,
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0xbe7f07e1UL, 0x06c36084UL, 0x5ea070d2UL, 0xe61c17b7UL, 0xf4a9b859UL,
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0x4c15df3cUL, 0xd1c2e785UL, 0x697e80e0UL, 0x7bcb2f0eUL, 0xc377486bUL,
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0xcb0d0fa2UL, 0x73b168c7UL, 0x6104c729UL, 0xd9b8a04cUL, 0x446f98f5UL,
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0xfcd3ff90UL, 0xee66507eUL, 0x56da371bUL, 0x0eb9274dUL, 0xb6054028UL,
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0xa4b0efc6UL, 0x1c0c88a3UL, 0x81dbb01aUL, 0x3967d77fUL, 0x2bd27891UL,
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0x936e1ff4UL, 0x3b26f703UL, 0x839a9066UL, 0x912f3f88UL, 0x299358edUL,
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0xb4446054UL, 0x0cf80731UL, 0x1e4da8dfUL, 0xa6f1cfbaUL, 0xfe92dfecUL,
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0x462eb889UL, 0x549b1767UL, 0xec277002UL, 0x71f048bbUL, 0xc94c2fdeUL,
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0xdbf98030UL, 0x6345e755UL, 0x6b3fa09cUL, 0xd383c7f9UL, 0xc1366817UL,
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0x798a0f72UL, 0xe45d37cbUL, 0x5ce150aeUL, 0x4e54ff40UL, 0xf6e89825UL,
|
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0xae8b8873UL, 0x1637ef16UL, 0x048240f8UL, 0xbc3e279dUL, 0x21e91f24UL,
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0x99557841UL, 0x8be0d7afUL, 0x335cb0caUL, 0xed59b63bUL, 0x55e5d15eUL,
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0x47507eb0UL, 0xffec19d5UL, 0x623b216cUL, 0xda874609UL, 0xc832e9e7UL,
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0x708e8e82UL, 0x28ed9ed4UL, 0x9051f9b1UL, 0x82e4565fUL, 0x3a58313aUL,
|
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0xa78f0983UL, 0x1f336ee6UL, 0x0d86c108UL, 0xb53aa66dUL, 0xbd40e1a4UL,
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0x05fc86c1UL, 0x1749292fUL, 0xaff54e4aUL, 0x322276f3UL, 0x8a9e1196UL,
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0x982bbe78UL, 0x2097d91dUL, 0x78f4c94bUL, 0xc048ae2eUL, 0xd2fd01c0UL,
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0x6a4166a5UL, 0xf7965e1cUL, 0x4f2a3979UL, 0x5d9f9697UL, 0xe523f1f2UL,
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0x4d6b1905UL, 0xf5d77e60UL, 0xe762d18eUL, 0x5fdeb6ebUL, 0xc2098e52UL,
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0x7ab5e937UL, 0x680046d9UL, 0xd0bc21bcUL, 0x88df31eaUL, 0x3063568fUL,
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0x22d6f961UL, 0x9a6a9e04UL, 0x07bda6bdUL, 0xbf01c1d8UL, 0xadb46e36UL,
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0x15080953UL, 0x1d724e9aUL, 0xa5ce29ffUL, 0xb77b8611UL, 0x0fc7e174UL,
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0x9210d9cdUL, 0x2aacbea8UL, 0x38191146UL, 0x80a57623UL, 0xd8c66675UL,
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0x607a0110UL, 0x72cfaefeUL, 0xca73c99bUL, 0x57a4f122UL, 0xef189647UL,
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0xfdad39a9UL, 0x45115eccUL, 0x764dee06UL, 0xcef18963UL, 0xdc44268dUL,
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0x64f841e8UL, 0xf92f7951UL, 0x41931e34UL, 0x5326b1daUL, 0xeb9ad6bfUL,
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0xb3f9c6e9UL, 0x0b45a18cUL, 0x19f00e62UL, 0xa14c6907UL, 0x3c9b51beUL,
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0x842736dbUL, 0x96929935UL, 0x2e2efe50UL, 0x2654b999UL, 0x9ee8defcUL,
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0x8c5d7112UL, 0x34e11677UL, 0xa9362eceUL, 0x118a49abUL, 0x033fe645UL,
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0xbb838120UL, 0xe3e09176UL, 0x5b5cf613UL, 0x49e959fdUL, 0xf1553e98UL,
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0x6c820621UL, 0xd43e6144UL, 0xc68bceaaUL, 0x7e37a9cfUL, 0xd67f4138UL,
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0x6ec3265dUL, 0x7c7689b3UL, 0xc4caeed6UL, 0x591dd66fUL, 0xe1a1b10aUL,
|
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0xf3141ee4UL, 0x4ba87981UL, 0x13cb69d7UL, 0xab770eb2UL, 0xb9c2a15cUL,
|
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0x017ec639UL, 0x9ca9fe80UL, 0x241599e5UL, 0x36a0360bUL, 0x8e1c516eUL,
|
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0x866616a7UL, 0x3eda71c2UL, 0x2c6fde2cUL, 0x94d3b949UL, 0x090481f0UL,
|
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0xb1b8e695UL, 0xa30d497bUL, 0x1bb12e1eUL, 0x43d23e48UL, 0xfb6e592dUL,
|
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0xe9dbf6c3UL, 0x516791a6UL, 0xccb0a91fUL, 0x740cce7aUL, 0x66b96194UL,
|
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0xde0506f1UL
|
||||
},
|
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{
|
||||
0x00000000UL, 0x96300777UL, 0x2c610eeeUL, 0xba510999UL, 0x19c46d07UL,
|
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0x8ff46a70UL, 0x35a563e9UL, 0xa395649eUL, 0x3288db0eUL, 0xa4b8dc79UL,
|
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0x1ee9d5e0UL, 0x88d9d297UL, 0x2b4cb609UL, 0xbd7cb17eUL, 0x072db8e7UL,
|
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0x911dbf90UL, 0x6410b71dUL, 0xf220b06aUL, 0x4871b9f3UL, 0xde41be84UL,
|
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0x7dd4da1aUL, 0xebe4dd6dUL, 0x51b5d4f4UL, 0xc785d383UL, 0x56986c13UL,
|
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0xc0a86b64UL, 0x7af962fdUL, 0xecc9658aUL, 0x4f5c0114UL, 0xd96c0663UL,
|
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0x633d0ffaUL, 0xf50d088dUL, 0xc8206e3bUL, 0x5e10694cUL, 0xe44160d5UL,
|
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0x727167a2UL, 0xd1e4033cUL, 0x47d4044bUL, 0xfd850dd2UL, 0x6bb50aa5UL,
|
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0xfaa8b535UL, 0x6c98b242UL, 0xd6c9bbdbUL, 0x40f9bcacUL, 0xe36cd832UL,
|
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0x755cdf45UL, 0xcf0dd6dcUL, 0x593dd1abUL, 0xac30d926UL, 0x3a00de51UL,
|
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0x8051d7c8UL, 0x1661d0bfUL, 0xb5f4b421UL, 0x23c4b356UL, 0x9995bacfUL,
|
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0x0fa5bdb8UL, 0x9eb80228UL, 0x0888055fUL, 0xb2d90cc6UL, 0x24e90bb1UL,
|
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0x877c6f2fUL, 0x114c6858UL, 0xab1d61c1UL, 0x3d2d66b6UL, 0x9041dc76UL,
|
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0x0671db01UL, 0xbc20d298UL, 0x2a10d5efUL, 0x8985b171UL, 0x1fb5b606UL,
|
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0xa5e4bf9fUL, 0x33d4b8e8UL, 0xa2c90778UL, 0x34f9000fUL, 0x8ea80996UL,
|
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0x18980ee1UL, 0xbb0d6a7fUL, 0x2d3d6d08UL, 0x976c6491UL, 0x015c63e6UL,
|
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0xf4516b6bUL, 0x62616c1cUL, 0xd8306585UL, 0x4e0062f2UL, 0xed95066cUL,
|
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0x7ba5011bUL, 0xc1f40882UL, 0x57c40ff5UL, 0xc6d9b065UL, 0x50e9b712UL,
|
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0xeab8be8bUL, 0x7c88b9fcUL, 0xdf1ddd62UL, 0x492dda15UL, 0xf37cd38cUL,
|
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0x654cd4fbUL, 0x5861b24dUL, 0xce51b53aUL, 0x7400bca3UL, 0xe230bbd4UL,
|
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0x41a5df4aUL, 0xd795d83dUL, 0x6dc4d1a4UL, 0xfbf4d6d3UL, 0x6ae96943UL,
|
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0xfcd96e34UL, 0x468867adUL, 0xd0b860daUL, 0x732d0444UL, 0xe51d0333UL,
|
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0x5f4c0aaaUL, 0xc97c0dddUL, 0x3c710550UL, 0xaa410227UL, 0x10100bbeUL,
|
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0x86200cc9UL, 0x25b56857UL, 0xb3856f20UL, 0x09d466b9UL, 0x9fe461ceUL,
|
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0x0ef9de5eUL, 0x98c9d929UL, 0x2298d0b0UL, 0xb4a8d7c7UL, 0x173db359UL,
|
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0x810db42eUL, 0x3b5cbdb7UL, 0xad6cbac0UL, 0x2083b8edUL, 0xb6b3bf9aUL,
|
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0x0ce2b603UL, 0x9ad2b174UL, 0x3947d5eaUL, 0xaf77d29dUL, 0x1526db04UL,
|
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0x8316dc73UL, 0x120b63e3UL, 0x843b6494UL, 0x3e6a6d0dUL, 0xa85a6a7aUL,
|
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0x0bcf0ee4UL, 0x9dff0993UL, 0x27ae000aUL, 0xb19e077dUL, 0x44930ff0UL,
|
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0xd2a30887UL, 0x68f2011eUL, 0xfec20669UL, 0x5d5762f7UL, 0xcb676580UL,
|
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0x71366c19UL, 0xe7066b6eUL, 0x761bd4feUL, 0xe02bd389UL, 0x5a7ada10UL,
|
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0xcc4add67UL, 0x6fdfb9f9UL, 0xf9efbe8eUL, 0x43beb717UL, 0xd58eb060UL,
|
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0xe8a3d6d6UL, 0x7e93d1a1UL, 0xc4c2d838UL, 0x52f2df4fUL, 0xf167bbd1UL,
|
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0x6757bca6UL, 0xdd06b53fUL, 0x4b36b248UL, 0xda2b0dd8UL, 0x4c1b0aafUL,
|
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0xf64a0336UL, 0x607a0441UL, 0xc3ef60dfUL, 0x55df67a8UL, 0xef8e6e31UL,
|
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0x79be6946UL, 0x8cb361cbUL, 0x1a8366bcUL, 0xa0d26f25UL, 0x36e26852UL,
|
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0x95770cccUL, 0x03470bbbUL, 0xb9160222UL, 0x2f260555UL, 0xbe3bbac5UL,
|
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0x280bbdb2UL, 0x925ab42bUL, 0x046ab35cUL, 0xa7ffd7c2UL, 0x31cfd0b5UL,
|
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0x8b9ed92cUL, 0x1daede5bUL, 0xb0c2649bUL, 0x26f263ecUL, 0x9ca36a75UL,
|
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0x0a936d02UL, 0xa906099cUL, 0x3f360eebUL, 0x85670772UL, 0x13570005UL,
|
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0x824abf95UL, 0x147ab8e2UL, 0xae2bb17bUL, 0x381bb60cUL, 0x9b8ed292UL,
|
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0x0dbed5e5UL, 0xb7efdc7cUL, 0x21dfdb0bUL, 0xd4d2d386UL, 0x42e2d4f1UL,
|
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0xf8b3dd68UL, 0x6e83da1fUL, 0xcd16be81UL, 0x5b26b9f6UL, 0xe177b06fUL,
|
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0x7747b718UL, 0xe65a0888UL, 0x706a0fffUL, 0xca3b0666UL, 0x5c0b0111UL,
|
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0xff9e658fUL, 0x69ae62f8UL, 0xd3ff6b61UL, 0x45cf6c16UL, 0x78e20aa0UL,
|
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0xeed20dd7UL, 0x5483044eUL, 0xc2b30339UL, 0x612667a7UL, 0xf71660d0UL,
|
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0x4d476949UL, 0xdb776e3eUL, 0x4a6ad1aeUL, 0xdc5ad6d9UL, 0x660bdf40UL,
|
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0xf03bd837UL, 0x53aebca9UL, 0xc59ebbdeUL, 0x7fcfb247UL, 0xe9ffb530UL,
|
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0x1cf2bdbdUL, 0x8ac2bacaUL, 0x3093b353UL, 0xa6a3b424UL, 0x0536d0baUL,
|
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0x9306d7cdUL, 0x2957de54UL, 0xbf67d923UL, 0x2e7a66b3UL, 0xb84a61c4UL,
|
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0x021b685dUL, 0x942b6f2aUL, 0x37be0bb4UL, 0xa18e0cc3UL, 0x1bdf055aUL,
|
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0x8def022dUL
|
||||
},
|
||||
{
|
||||
0x00000000UL, 0x41311b19UL, 0x82623632UL, 0xc3532d2bUL, 0x04c56c64UL,
|
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0x45f4777dUL, 0x86a75a56UL, 0xc796414fUL, 0x088ad9c8UL, 0x49bbc2d1UL,
|
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0x8ae8effaUL, 0xcbd9f4e3UL, 0x0c4fb5acUL, 0x4d7eaeb5UL, 0x8e2d839eUL,
|
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0xcf1c9887UL, 0x5112c24aUL, 0x1023d953UL, 0xd370f478UL, 0x9241ef61UL,
|
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0x55d7ae2eUL, 0x14e6b537UL, 0xd7b5981cUL, 0x96848305UL, 0x59981b82UL,
|
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0x18a9009bUL, 0xdbfa2db0UL, 0x9acb36a9UL, 0x5d5d77e6UL, 0x1c6c6cffUL,
|
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0xdf3f41d4UL, 0x9e0e5acdUL, 0xa2248495UL, 0xe3159f8cUL, 0x2046b2a7UL,
|
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0x6177a9beUL, 0xa6e1e8f1UL, 0xe7d0f3e8UL, 0x2483dec3UL, 0x65b2c5daUL,
|
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0xaaae5d5dUL, 0xeb9f4644UL, 0x28cc6b6fUL, 0x69fd7076UL, 0xae6b3139UL,
|
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0xef5a2a20UL, 0x2c09070bUL, 0x6d381c12UL, 0xf33646dfUL, 0xb2075dc6UL,
|
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0x715470edUL, 0x30656bf4UL, 0xf7f32abbUL, 0xb6c231a2UL, 0x75911c89UL,
|
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0x34a00790UL, 0xfbbc9f17UL, 0xba8d840eUL, 0x79dea925UL, 0x38efb23cUL,
|
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0xff79f373UL, 0xbe48e86aUL, 0x7d1bc541UL, 0x3c2ade58UL, 0x054f79f0UL,
|
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0x447e62e9UL, 0x872d4fc2UL, 0xc61c54dbUL, 0x018a1594UL, 0x40bb0e8dUL,
|
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|
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0xce968d13UL, 0x0900cc5cUL, 0x4831d745UL, 0x8b62fa6eUL, 0xca53e177UL,
|
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|
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|
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0xdeb55440UL, 0x9f844f59UL, 0x58120e16UL, 0x1923150fUL, 0xda703824UL,
|
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0x9b41233dUL, 0xa76bfd65UL, 0xe65ae67cUL, 0x2509cb57UL, 0x6438d04eUL,
|
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0xa3ae9101UL, 0xe29f8a18UL, 0x21cca733UL, 0x60fdbc2aUL, 0xafe124adUL,
|
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0xeed03fb4UL, 0x2d83129fUL, 0x6cb20986UL, 0xab2448c9UL, 0xea1553d0UL,
|
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0x29467efbUL, 0x687765e2UL, 0xf6793f2fUL, 0xb7482436UL, 0x741b091dUL,
|
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0x352a1204UL, 0xf2bc534bUL, 0xb38d4852UL, 0x70de6579UL, 0x31ef7e60UL,
|
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|
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0xbb07919aUL, 0x7854bcb1UL, 0x3965a7a8UL, 0x4b98833bUL, 0x0aa99822UL,
|
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0xc9fab509UL, 0x88cbae10UL, 0x4f5def5fUL, 0x0e6cf446UL, 0xcd3fd96dUL,
|
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0x8c0ec274UL, 0x43125af3UL, 0x022341eaUL, 0xc1706cc1UL, 0x804177d8UL,
|
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0x47d73697UL, 0x06e62d8eUL, 0xc5b500a5UL, 0x84841bbcUL, 0x1a8a4171UL,
|
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0x5bbb5a68UL, 0x98e87743UL, 0xd9d96c5aUL, 0x1e4f2d15UL, 0x5f7e360cUL,
|
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0x9c2d1b27UL, 0xdd1c003eUL, 0x120098b9UL, 0x533183a0UL, 0x9062ae8bUL,
|
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0xd153b592UL, 0x16c5f4ddUL, 0x57f4efc4UL, 0x94a7c2efUL, 0xd596d9f6UL,
|
||||
0xe9bc07aeUL, 0xa88d1cb7UL, 0x6bde319cUL, 0x2aef2a85UL, 0xed796bcaUL,
|
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0xac4870d3UL, 0x6f1b5df8UL, 0x2e2a46e1UL, 0xe136de66UL, 0xa007c57fUL,
|
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0x6354e854UL, 0x2265f34dUL, 0xe5f3b202UL, 0xa4c2a91bUL, 0x67918430UL,
|
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0x26a09f29UL, 0xb8aec5e4UL, 0xf99fdefdUL, 0x3accf3d6UL, 0x7bfde8cfUL,
|
||||
0xbc6ba980UL, 0xfd5ab299UL, 0x3e099fb2UL, 0x7f3884abUL, 0xb0241c2cUL,
|
||||
0xf1150735UL, 0x32462a1eUL, 0x73773107UL, 0xb4e17048UL, 0xf5d06b51UL,
|
||||
0x3683467aUL, 0x77b25d63UL, 0x4ed7facbUL, 0x0fe6e1d2UL, 0xccb5ccf9UL,
|
||||
0x8d84d7e0UL, 0x4a1296afUL, 0x0b238db6UL, 0xc870a09dUL, 0x8941bb84UL,
|
||||
0x465d2303UL, 0x076c381aUL, 0xc43f1531UL, 0x850e0e28UL, 0x42984f67UL,
|
||||
0x03a9547eUL, 0xc0fa7955UL, 0x81cb624cUL, 0x1fc53881UL, 0x5ef42398UL,
|
||||
0x9da70eb3UL, 0xdc9615aaUL, 0x1b0054e5UL, 0x5a314ffcUL, 0x996262d7UL,
|
||||
0xd85379ceUL, 0x174fe149UL, 0x567efa50UL, 0x952dd77bUL, 0xd41ccc62UL,
|
||||
0x138a8d2dUL, 0x52bb9634UL, 0x91e8bb1fUL, 0xd0d9a006UL, 0xecf37e5eUL,
|
||||
0xadc26547UL, 0x6e91486cUL, 0x2fa05375UL, 0xe836123aUL, 0xa9070923UL,
|
||||
0x6a542408UL, 0x2b653f11UL, 0xe479a796UL, 0xa548bc8fUL, 0x661b91a4UL,
|
||||
0x272a8abdUL, 0xe0bccbf2UL, 0xa18dd0ebUL, 0x62defdc0UL, 0x23efe6d9UL,
|
||||
0xbde1bc14UL, 0xfcd0a70dUL, 0x3f838a26UL, 0x7eb2913fUL, 0xb924d070UL,
|
||||
0xf815cb69UL, 0x3b46e642UL, 0x7a77fd5bUL, 0xb56b65dcUL, 0xf45a7ec5UL,
|
||||
0x370953eeUL, 0x763848f7UL, 0xb1ae09b8UL, 0xf09f12a1UL, 0x33cc3f8aUL,
|
||||
0x72fd2493UL
|
||||
},
|
||||
{
|
||||
0x00000000UL, 0x376ac201UL, 0x6ed48403UL, 0x59be4602UL, 0xdca80907UL,
|
||||
0xebc2cb06UL, 0xb27c8d04UL, 0x85164f05UL, 0xb851130eUL, 0x8f3bd10fUL,
|
||||
0xd685970dUL, 0xe1ef550cUL, 0x64f91a09UL, 0x5393d808UL, 0x0a2d9e0aUL,
|
||||
0x3d475c0bUL, 0x70a3261cUL, 0x47c9e41dUL, 0x1e77a21fUL, 0x291d601eUL,
|
||||
0xac0b2f1bUL, 0x9b61ed1aUL, 0xc2dfab18UL, 0xf5b56919UL, 0xc8f23512UL,
|
||||
0xff98f713UL, 0xa626b111UL, 0x914c7310UL, 0x145a3c15UL, 0x2330fe14UL,
|
||||
0x7a8eb816UL, 0x4de47a17UL, 0xe0464d38UL, 0xd72c8f39UL, 0x8e92c93bUL,
|
||||
0xb9f80b3aUL, 0x3cee443fUL, 0x0b84863eUL, 0x523ac03cUL, 0x6550023dUL,
|
||||
0x58175e36UL, 0x6f7d9c37UL, 0x36c3da35UL, 0x01a91834UL, 0x84bf5731UL,
|
||||
0xb3d59530UL, 0xea6bd332UL, 0xdd011133UL, 0x90e56b24UL, 0xa78fa925UL,
|
||||
0xfe31ef27UL, 0xc95b2d26UL, 0x4c4d6223UL, 0x7b27a022UL, 0x2299e620UL,
|
||||
0x15f32421UL, 0x28b4782aUL, 0x1fdeba2bUL, 0x4660fc29UL, 0x710a3e28UL,
|
||||
0xf41c712dUL, 0xc376b32cUL, 0x9ac8f52eUL, 0xada2372fUL, 0xc08d9a70UL,
|
||||
0xf7e75871UL, 0xae591e73UL, 0x9933dc72UL, 0x1c259377UL, 0x2b4f5176UL,
|
||||
0x72f11774UL, 0x459bd575UL, 0x78dc897eUL, 0x4fb64b7fUL, 0x16080d7dUL,
|
||||
0x2162cf7cUL, 0xa4748079UL, 0x931e4278UL, 0xcaa0047aUL, 0xfdcac67bUL,
|
||||
0xb02ebc6cUL, 0x87447e6dUL, 0xdefa386fUL, 0xe990fa6eUL, 0x6c86b56bUL,
|
||||
0x5bec776aUL, 0x02523168UL, 0x3538f369UL, 0x087faf62UL, 0x3f156d63UL,
|
||||
0x66ab2b61UL, 0x51c1e960UL, 0xd4d7a665UL, 0xe3bd6464UL, 0xba032266UL,
|
||||
0x8d69e067UL, 0x20cbd748UL, 0x17a11549UL, 0x4e1f534bUL, 0x7975914aUL,
|
||||
0xfc63de4fUL, 0xcb091c4eUL, 0x92b75a4cUL, 0xa5dd984dUL, 0x989ac446UL,
|
||||
0xaff00647UL, 0xf64e4045UL, 0xc1248244UL, 0x4432cd41UL, 0x73580f40UL,
|
||||
0x2ae64942UL, 0x1d8c8b43UL, 0x5068f154UL, 0x67023355UL, 0x3ebc7557UL,
|
||||
0x09d6b756UL, 0x8cc0f853UL, 0xbbaa3a52UL, 0xe2147c50UL, 0xd57ebe51UL,
|
||||
0xe839e25aUL, 0xdf53205bUL, 0x86ed6659UL, 0xb187a458UL, 0x3491eb5dUL,
|
||||
0x03fb295cUL, 0x5a456f5eUL, 0x6d2fad5fUL, 0x801b35e1UL, 0xb771f7e0UL,
|
||||
0xeecfb1e2UL, 0xd9a573e3UL, 0x5cb33ce6UL, 0x6bd9fee7UL, 0x3267b8e5UL,
|
||||
0x050d7ae4UL, 0x384a26efUL, 0x0f20e4eeUL, 0x569ea2ecUL, 0x61f460edUL,
|
||||
0xe4e22fe8UL, 0xd388ede9UL, 0x8a36abebUL, 0xbd5c69eaUL, 0xf0b813fdUL,
|
||||
0xc7d2d1fcUL, 0x9e6c97feUL, 0xa90655ffUL, 0x2c101afaUL, 0x1b7ad8fbUL,
|
||||
0x42c49ef9UL, 0x75ae5cf8UL, 0x48e900f3UL, 0x7f83c2f2UL, 0x263d84f0UL,
|
||||
0x115746f1UL, 0x944109f4UL, 0xa32bcbf5UL, 0xfa958df7UL, 0xcdff4ff6UL,
|
||||
0x605d78d9UL, 0x5737bad8UL, 0x0e89fcdaUL, 0x39e33edbUL, 0xbcf571deUL,
|
||||
0x8b9fb3dfUL, 0xd221f5ddUL, 0xe54b37dcUL, 0xd80c6bd7UL, 0xef66a9d6UL,
|
||||
0xb6d8efd4UL, 0x81b22dd5UL, 0x04a462d0UL, 0x33cea0d1UL, 0x6a70e6d3UL,
|
||||
0x5d1a24d2UL, 0x10fe5ec5UL, 0x27949cc4UL, 0x7e2adac6UL, 0x494018c7UL,
|
||||
0xcc5657c2UL, 0xfb3c95c3UL, 0xa282d3c1UL, 0x95e811c0UL, 0xa8af4dcbUL,
|
||||
0x9fc58fcaUL, 0xc67bc9c8UL, 0xf1110bc9UL, 0x740744ccUL, 0x436d86cdUL,
|
||||
0x1ad3c0cfUL, 0x2db902ceUL, 0x4096af91UL, 0x77fc6d90UL, 0x2e422b92UL,
|
||||
0x1928e993UL, 0x9c3ea696UL, 0xab546497UL, 0xf2ea2295UL, 0xc580e094UL,
|
||||
0xf8c7bc9fUL, 0xcfad7e9eUL, 0x9613389cUL, 0xa179fa9dUL, 0x246fb598UL,
|
||||
0x13057799UL, 0x4abb319bUL, 0x7dd1f39aUL, 0x3035898dUL, 0x075f4b8cUL,
|
||||
0x5ee10d8eUL, 0x698bcf8fUL, 0xec9d808aUL, 0xdbf7428bUL, 0x82490489UL,
|
||||
0xb523c688UL, 0x88649a83UL, 0xbf0e5882UL, 0xe6b01e80UL, 0xd1dadc81UL,
|
||||
0x54cc9384UL, 0x63a65185UL, 0x3a181787UL, 0x0d72d586UL, 0xa0d0e2a9UL,
|
||||
0x97ba20a8UL, 0xce0466aaUL, 0xf96ea4abUL, 0x7c78ebaeUL, 0x4b1229afUL,
|
||||
0x12ac6fadUL, 0x25c6adacUL, 0x1881f1a7UL, 0x2feb33a6UL, 0x765575a4UL,
|
||||
0x413fb7a5UL, 0xc429f8a0UL, 0xf3433aa1UL, 0xaafd7ca3UL, 0x9d97bea2UL,
|
||||
0xd073c4b5UL, 0xe71906b4UL, 0xbea740b6UL, 0x89cd82b7UL, 0x0cdbcdb2UL,
|
||||
0x3bb10fb3UL, 0x620f49b1UL, 0x55658bb0UL, 0x6822d7bbUL, 0x5f4815baUL,
|
||||
0x06f653b8UL, 0x319c91b9UL, 0xb48adebcUL, 0x83e01cbdUL, 0xda5e5abfUL,
|
||||
0xed3498beUL
|
||||
},
|
||||
{
|
||||
0x00000000UL, 0x6567bcb8UL, 0x8bc809aaUL, 0xeeafb512UL, 0x5797628fUL,
|
||||
0x32f0de37UL, 0xdc5f6b25UL, 0xb938d79dUL, 0xef28b4c5UL, 0x8a4f087dUL,
|
||||
0x64e0bd6fUL, 0x018701d7UL, 0xb8bfd64aUL, 0xddd86af2UL, 0x3377dfe0UL,
|
||||
0x56106358UL, 0x9f571950UL, 0xfa30a5e8UL, 0x149f10faUL, 0x71f8ac42UL,
|
||||
0xc8c07bdfUL, 0xada7c767UL, 0x43087275UL, 0x266fcecdUL, 0x707fad95UL,
|
||||
0x1518112dUL, 0xfbb7a43fUL, 0x9ed01887UL, 0x27e8cf1aUL, 0x428f73a2UL,
|
||||
0xac20c6b0UL, 0xc9477a08UL, 0x3eaf32a0UL, 0x5bc88e18UL, 0xb5673b0aUL,
|
||||
0xd00087b2UL, 0x6938502fUL, 0x0c5fec97UL, 0xe2f05985UL, 0x8797e53dUL,
|
||||
0xd1878665UL, 0xb4e03addUL, 0x5a4f8fcfUL, 0x3f283377UL, 0x8610e4eaUL,
|
||||
0xe3775852UL, 0x0dd8ed40UL, 0x68bf51f8UL, 0xa1f82bf0UL, 0xc49f9748UL,
|
||||
0x2a30225aUL, 0x4f579ee2UL, 0xf66f497fUL, 0x9308f5c7UL, 0x7da740d5UL,
|
||||
0x18c0fc6dUL, 0x4ed09f35UL, 0x2bb7238dUL, 0xc518969fUL, 0xa07f2a27UL,
|
||||
0x1947fdbaUL, 0x7c204102UL, 0x928ff410UL, 0xf7e848a8UL, 0x3d58149bUL,
|
||||
0x583fa823UL, 0xb6901d31UL, 0xd3f7a189UL, 0x6acf7614UL, 0x0fa8caacUL,
|
||||
0xe1077fbeUL, 0x8460c306UL, 0xd270a05eUL, 0xb7171ce6UL, 0x59b8a9f4UL,
|
||||
0x3cdf154cUL, 0x85e7c2d1UL, 0xe0807e69UL, 0x0e2fcb7bUL, 0x6b4877c3UL,
|
||||
0xa20f0dcbUL, 0xc768b173UL, 0x29c70461UL, 0x4ca0b8d9UL, 0xf5986f44UL,
|
||||
0x90ffd3fcUL, 0x7e5066eeUL, 0x1b37da56UL, 0x4d27b90eUL, 0x284005b6UL,
|
||||
0xc6efb0a4UL, 0xa3880c1cUL, 0x1ab0db81UL, 0x7fd76739UL, 0x9178d22bUL,
|
||||
0xf41f6e93UL, 0x03f7263bUL, 0x66909a83UL, 0x883f2f91UL, 0xed589329UL,
|
||||
0x546044b4UL, 0x3107f80cUL, 0xdfa84d1eUL, 0xbacff1a6UL, 0xecdf92feUL,
|
||||
0x89b82e46UL, 0x67179b54UL, 0x027027ecUL, 0xbb48f071UL, 0xde2f4cc9UL,
|
||||
0x3080f9dbUL, 0x55e74563UL, 0x9ca03f6bUL, 0xf9c783d3UL, 0x176836c1UL,
|
||||
0x720f8a79UL, 0xcb375de4UL, 0xae50e15cUL, 0x40ff544eUL, 0x2598e8f6UL,
|
||||
0x73888baeUL, 0x16ef3716UL, 0xf8408204UL, 0x9d273ebcUL, 0x241fe921UL,
|
||||
0x41785599UL, 0xafd7e08bUL, 0xcab05c33UL, 0x3bb659edUL, 0x5ed1e555UL,
|
||||
0xb07e5047UL, 0xd519ecffUL, 0x6c213b62UL, 0x094687daUL, 0xe7e932c8UL,
|
||||
0x828e8e70UL, 0xd49eed28UL, 0xb1f95190UL, 0x5f56e482UL, 0x3a31583aUL,
|
||||
0x83098fa7UL, 0xe66e331fUL, 0x08c1860dUL, 0x6da63ab5UL, 0xa4e140bdUL,
|
||||
0xc186fc05UL, 0x2f294917UL, 0x4a4ef5afUL, 0xf3762232UL, 0x96119e8aUL,
|
||||
0x78be2b98UL, 0x1dd99720UL, 0x4bc9f478UL, 0x2eae48c0UL, 0xc001fdd2UL,
|
||||
0xa566416aUL, 0x1c5e96f7UL, 0x79392a4fUL, 0x97969f5dUL, 0xf2f123e5UL,
|
||||
0x05196b4dUL, 0x607ed7f5UL, 0x8ed162e7UL, 0xebb6de5fUL, 0x528e09c2UL,
|
||||
0x37e9b57aUL, 0xd9460068UL, 0xbc21bcd0UL, 0xea31df88UL, 0x8f566330UL,
|
||||
0x61f9d622UL, 0x049e6a9aUL, 0xbda6bd07UL, 0xd8c101bfUL, 0x366eb4adUL,
|
||||
0x53090815UL, 0x9a4e721dUL, 0xff29cea5UL, 0x11867bb7UL, 0x74e1c70fUL,
|
||||
0xcdd91092UL, 0xa8beac2aUL, 0x46111938UL, 0x2376a580UL, 0x7566c6d8UL,
|
||||
0x10017a60UL, 0xfeaecf72UL, 0x9bc973caUL, 0x22f1a457UL, 0x479618efUL,
|
||||
0xa939adfdUL, 0xcc5e1145UL, 0x06ee4d76UL, 0x6389f1ceUL, 0x8d2644dcUL,
|
||||
0xe841f864UL, 0x51792ff9UL, 0x341e9341UL, 0xdab12653UL, 0xbfd69aebUL,
|
||||
0xe9c6f9b3UL, 0x8ca1450bUL, 0x620ef019UL, 0x07694ca1UL, 0xbe519b3cUL,
|
||||
0xdb362784UL, 0x35999296UL, 0x50fe2e2eUL, 0x99b95426UL, 0xfcdee89eUL,
|
||||
0x12715d8cUL, 0x7716e134UL, 0xce2e36a9UL, 0xab498a11UL, 0x45e63f03UL,
|
||||
0x208183bbUL, 0x7691e0e3UL, 0x13f65c5bUL, 0xfd59e949UL, 0x983e55f1UL,
|
||||
0x2106826cUL, 0x44613ed4UL, 0xaace8bc6UL, 0xcfa9377eUL, 0x38417fd6UL,
|
||||
0x5d26c36eUL, 0xb389767cUL, 0xd6eecac4UL, 0x6fd61d59UL, 0x0ab1a1e1UL,
|
||||
0xe41e14f3UL, 0x8179a84bUL, 0xd769cb13UL, 0xb20e77abUL, 0x5ca1c2b9UL,
|
||||
0x39c67e01UL, 0x80fea99cUL, 0xe5991524UL, 0x0b36a036UL, 0x6e511c8eUL,
|
||||
0xa7166686UL, 0xc271da3eUL, 0x2cde6f2cUL, 0x49b9d394UL, 0xf0810409UL,
|
||||
0x95e6b8b1UL, 0x7b490da3UL, 0x1e2eb11bUL, 0x483ed243UL, 0x2d596efbUL,
|
||||
0xc3f6dbe9UL, 0xa6916751UL, 0x1fa9b0ccUL, 0x7ace0c74UL, 0x9461b966UL,
|
||||
0xf10605deUL
|
||||
#endif
|
||||
}
|
||||
};
|
||||
|
|
@ -1,6 +1,6 @@
|
|||
/* deflate.c -- compress data using the deflation algorithm
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/*
|
||||
|
|
@ -37,7 +37,7 @@
|
|||
* REFERENCES
|
||||
*
|
||||
* Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
|
||||
* Available in ftp://ds.internic.net/rfc/rfc1951.txt
|
||||
* Available in http://www.ietf.org/rfc/rfc1951.txt
|
||||
*
|
||||
* A description of the Rabin and Karp algorithm is given in the book
|
||||
* "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
|
||||
|
|
@ -52,7 +52,7 @@
|
|||
#include "deflate.h"
|
||||
|
||||
const char deflate_copyright[] =
|
||||
" deflate 1.1.4 Copyright 1995-2002 Jean-loup Gailly ";
|
||||
" deflate 1.2.1 Copyright 1995-2003 Jean-loup Gailly ";
|
||||
/*
|
||||
If you use the zlib library in a product, an acknowledgment is welcome
|
||||
in the documentation of your product. If for some reason you cannot
|
||||
|
|
@ -76,17 +76,22 @@ typedef block_state (*compress_func) OF((deflate_state *s, int flush));
|
|||
local void fill_window OF((deflate_state *s));
|
||||
local block_state deflate_stored OF((deflate_state *s, int flush));
|
||||
local block_state deflate_fast OF((deflate_state *s, int flush));
|
||||
#ifndef FASTEST
|
||||
local block_state deflate_slow OF((deflate_state *s, int flush));
|
||||
#endif
|
||||
local void lm_init OF((deflate_state *s));
|
||||
local void putShortMSB OF((deflate_state *s, uInt b));
|
||||
local void flush_pending OF((z_streamp strm));
|
||||
local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
|
||||
#ifndef FASTEST
|
||||
#ifdef ASMV
|
||||
void match_init OF((void)); /* asm code initialization */
|
||||
uInt longest_match OF((deflate_state *s, IPos cur_match));
|
||||
#else
|
||||
local uInt longest_match OF((deflate_state *s, IPos cur_match));
|
||||
#endif
|
||||
#endif
|
||||
local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));
|
||||
|
||||
#ifdef DEBUG
|
||||
local void check_match OF((deflate_state *s, IPos start, IPos match,
|
||||
|
|
@ -123,10 +128,16 @@ typedef struct config_s {
|
|||
compress_func func;
|
||||
} config;
|
||||
|
||||
#ifdef FASTEST
|
||||
local const config configuration_table[2] = {
|
||||
/* good lazy nice chain */
|
||||
/* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */
|
||||
/* 1 */ {4, 4, 8, 4, deflate_fast}}; /* max speed, no lazy matches */
|
||||
#else
|
||||
local const config configuration_table[10] = {
|
||||
/* good lazy nice chain */
|
||||
/* 0 */ {0, 0, 0, 0, deflate_stored}, /* store only */
|
||||
/* 1 */ {4, 4, 8, 4, deflate_fast}, /* maximum speed, no lazy matches */
|
||||
/* 1 */ {4, 4, 8, 4, deflate_fast}, /* max speed, no lazy matches */
|
||||
/* 2 */ {4, 5, 16, 8, deflate_fast},
|
||||
/* 3 */ {4, 6, 32, 32, deflate_fast},
|
||||
|
||||
|
|
@ -135,7 +146,8 @@ local const config configuration_table[10] = {
|
|||
/* 6 */ {8, 16, 128, 128, deflate_slow},
|
||||
/* 7 */ {8, 32, 128, 256, deflate_slow},
|
||||
/* 8 */ {32, 128, 258, 1024, deflate_slow},
|
||||
/* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* maximum compression */
|
||||
/* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* max compression */
|
||||
#endif
|
||||
|
||||
/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
|
||||
* For deflate_fast() (levels <= 3) good is ignored and lazy has a different
|
||||
|
|
@ -145,7 +157,9 @@ local const config configuration_table[10] = {
|
|||
#define EQUAL 0
|
||||
/* result of memcmp for equal strings */
|
||||
|
||||
#ifndef NO_DUMMY_DECL
|
||||
struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
|
||||
#endif
|
||||
|
||||
/* ===========================================================================
|
||||
* Update a hash value with the given input byte
|
||||
|
|
@ -174,7 +188,7 @@ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
|
|||
#else
|
||||
#define INSERT_STRING(s, str, match_head) \
|
||||
(UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
|
||||
s->prev[(str) & s->w_mask] = match_head = s->head[s->ins_h], \
|
||||
match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \
|
||||
s->head[s->ins_h] = (Pos)(str))
|
||||
#endif
|
||||
|
||||
|
|
@ -194,13 +208,13 @@ int ZEXPORT deflateInit_(strm, level, version, stream_size)
|
|||
int stream_size;
|
||||
{
|
||||
return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
|
||||
Z_DEFAULT_STRATEGY, version, stream_size);
|
||||
Z_DEFAULT_STRATEGY, version, stream_size);
|
||||
/* To do: ignore strm->next_in if we use it as window */
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
|
||||
version, stream_size)
|
||||
version, stream_size)
|
||||
z_streamp strm;
|
||||
int level;
|
||||
int method;
|
||||
|
|
@ -211,8 +225,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
|
|||
int stream_size;
|
||||
{
|
||||
deflate_state *s;
|
||||
int noheader = 0;
|
||||
static const char* my_version = ZLIB_VERSION;
|
||||
int wrap = 1;
|
||||
static const char my_version[] = ZLIB_VERSION;
|
||||
|
||||
ushf *overlay;
|
||||
/* We overlay pending_buf and d_buf+l_buf. This works since the average
|
||||
|
|
@ -221,37 +235,45 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
|
|||
|
||||
if (version == Z_NULL || version[0] != my_version[0] ||
|
||||
stream_size != sizeof(z_stream)) {
|
||||
return Z_VERSION_ERROR;
|
||||
return Z_VERSION_ERROR;
|
||||
}
|
||||
if (strm == Z_NULL) return Z_STREAM_ERROR;
|
||||
|
||||
strm->msg = Z_NULL;
|
||||
if (strm->zalloc == Z_NULL) {
|
||||
strm->zalloc = zcalloc;
|
||||
strm->opaque = (voidpf)0;
|
||||
if (strm->zalloc == (alloc_func)0) {
|
||||
strm->zalloc = zcalloc;
|
||||
strm->opaque = (voidpf)0;
|
||||
}
|
||||
if (strm->zfree == Z_NULL) strm->zfree = zcfree;
|
||||
if (strm->zfree == (free_func)0) strm->zfree = zcfree;
|
||||
|
||||
if (level == Z_DEFAULT_COMPRESSION) level = 6;
|
||||
#ifdef FASTEST
|
||||
level = 1;
|
||||
if (level != 0) level = 1;
|
||||
#else
|
||||
if (level == Z_DEFAULT_COMPRESSION) level = 6;
|
||||
#endif
|
||||
|
||||
if (windowBits < 0) { /* undocumented feature: suppress zlib header */
|
||||
noheader = 1;
|
||||
if (windowBits < 0) { /* suppress zlib wrapper */
|
||||
wrap = 0;
|
||||
windowBits = -windowBits;
|
||||
}
|
||||
#ifdef GZIP
|
||||
else if (windowBits > 15) {
|
||||
wrap = 2; /* write gzip wrapper instead */
|
||||
windowBits -= 16;
|
||||
}
|
||||
#endif
|
||||
if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
|
||||
windowBits < 9 || windowBits > 15 || level < 0 || level > 9 ||
|
||||
strategy < 0 || strategy > Z_HUFFMAN_ONLY) {
|
||||
windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
|
||||
strategy < 0 || strategy > Z_RLE) {
|
||||
return Z_STREAM_ERROR;
|
||||
}
|
||||
if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */
|
||||
s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
|
||||
if (s == Z_NULL) return Z_MEM_ERROR;
|
||||
strm->state = (struct internal_state FAR *)s;
|
||||
s->strm = strm;
|
||||
|
||||
s->noheader = noheader;
|
||||
s->wrap = wrap;
|
||||
s->w_bits = windowBits;
|
||||
s->w_size = 1 << s->w_bits;
|
||||
s->w_mask = s->w_size - 1;
|
||||
|
|
@ -273,6 +295,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
|
|||
|
||||
if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
|
||||
s->pending_buf == Z_NULL) {
|
||||
s->status = FINISH_STATE;
|
||||
strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
|
||||
deflateEnd (strm);
|
||||
return Z_MEM_ERROR;
|
||||
|
|
@ -299,16 +322,19 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
|
|||
IPos hash_head = 0;
|
||||
|
||||
if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
|
||||
strm->state->status != INIT_STATE) return Z_STREAM_ERROR;
|
||||
strm->state->wrap == 2 ||
|
||||
(strm->state->wrap == 1 && strm->state->status != INIT_STATE))
|
||||
return Z_STREAM_ERROR;
|
||||
|
||||
s = strm->state;
|
||||
strm->adler = adler32(strm->adler, dictionary, dictLength);
|
||||
if (s->wrap)
|
||||
strm->adler = adler32(strm->adler, dictionary, dictLength);
|
||||
|
||||
if (length < MIN_MATCH) return Z_OK;
|
||||
if (length > MAX_DIST(s)) {
|
||||
length = MAX_DIST(s);
|
||||
length = MAX_DIST(s);
|
||||
#ifndef USE_DICT_HEAD
|
||||
dictionary += dictLength - length; /* use the tail of the dictionary */
|
||||
dictionary += dictLength - length; /* use the tail of the dictionary */
|
||||
#endif
|
||||
}
|
||||
zmemcpy(s->window, dictionary, length);
|
||||
|
|
@ -322,7 +348,7 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
|
|||
s->ins_h = s->window[0];
|
||||
UPDATE_HASH(s, s->ins_h, s->window[1]);
|
||||
for (n = 0; n <= length - MIN_MATCH; n++) {
|
||||
INSERT_STRING(s, n, hash_head);
|
||||
INSERT_STRING(s, n, hash_head);
|
||||
}
|
||||
if (hash_head) hash_head = 0; /* to make compiler happy */
|
||||
return Z_OK;
|
||||
|
|
@ -333,9 +359,11 @@ int ZEXPORT deflateReset (strm)
|
|||
z_streamp strm;
|
||||
{
|
||||
deflate_state *s;
|
||||
|
||||
|
||||
if (strm == Z_NULL || strm->state == Z_NULL ||
|
||||
strm->zalloc == Z_NULL || strm->zfree == Z_NULL) return Z_STREAM_ERROR;
|
||||
strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0) {
|
||||
return Z_STREAM_ERROR;
|
||||
}
|
||||
|
||||
strm->total_in = strm->total_out = 0;
|
||||
strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */
|
||||
|
|
@ -345,11 +373,15 @@ int ZEXPORT deflateReset (strm)
|
|||
s->pending = 0;
|
||||
s->pending_out = s->pending_buf;
|
||||
|
||||
if (s->noheader < 0) {
|
||||
s->noheader = 0; /* was set to -1 by deflate(..., Z_FINISH); */
|
||||
if (s->wrap < 0) {
|
||||
s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */
|
||||
}
|
||||
s->status = s->noheader ? BUSY_STATE : INIT_STATE;
|
||||
strm->adler = 1;
|
||||
s->status = s->wrap ? INIT_STATE : BUSY_STATE;
|
||||
strm->adler =
|
||||
#ifdef GZIP
|
||||
s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
|
||||
#endif
|
||||
adler32(0L, Z_NULL, 0);
|
||||
s->last_flush = Z_NO_FLUSH;
|
||||
|
||||
_tr_init(s);
|
||||
|
|
@ -358,6 +390,18 @@ int ZEXPORT deflateReset (strm)
|
|||
return Z_OK;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
int ZEXPORT deflatePrime (strm, bits, value)
|
||||
z_streamp strm;
|
||||
int bits;
|
||||
int value;
|
||||
{
|
||||
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
|
||||
strm->state->bi_valid = bits;
|
||||
strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
|
||||
return Z_OK;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
int ZEXPORT deflateParams(strm, level, strategy)
|
||||
z_streamp strm;
|
||||
|
|
@ -371,29 +415,72 @@ int ZEXPORT deflateParams(strm, level, strategy)
|
|||
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
|
||||
s = strm->state;
|
||||
|
||||
if (level == Z_DEFAULT_COMPRESSION) {
|
||||
level = 6;
|
||||
}
|
||||
if (level < 0 || level > 9 || strategy < 0 || strategy > Z_HUFFMAN_ONLY) {
|
||||
return Z_STREAM_ERROR;
|
||||
#ifdef FASTEST
|
||||
if (level != 0) level = 1;
|
||||
#else
|
||||
if (level == Z_DEFAULT_COMPRESSION) level = 6;
|
||||
#endif
|
||||
if (level < 0 || level > 9 || strategy < 0 || strategy > Z_RLE) {
|
||||
return Z_STREAM_ERROR;
|
||||
}
|
||||
func = configuration_table[s->level].func;
|
||||
|
||||
if (func != configuration_table[level].func && strm->total_in != 0) {
|
||||
/* Flush the last buffer: */
|
||||
err = deflate(strm, Z_PARTIAL_FLUSH);
|
||||
/* Flush the last buffer: */
|
||||
err = deflate(strm, Z_PARTIAL_FLUSH);
|
||||
}
|
||||
if (s->level != level) {
|
||||
s->level = level;
|
||||
s->max_lazy_match = configuration_table[level].max_lazy;
|
||||
s->good_match = configuration_table[level].good_length;
|
||||
s->nice_match = configuration_table[level].nice_length;
|
||||
s->max_chain_length = configuration_table[level].max_chain;
|
||||
s->level = level;
|
||||
s->max_lazy_match = configuration_table[level].max_lazy;
|
||||
s->good_match = configuration_table[level].good_length;
|
||||
s->nice_match = configuration_table[level].nice_length;
|
||||
s->max_chain_length = configuration_table[level].max_chain;
|
||||
}
|
||||
s->strategy = strategy;
|
||||
return err;
|
||||
}
|
||||
|
||||
/* =========================================================================
|
||||
* For the default windowBits of 15 and memLevel of 8, this function returns
|
||||
* a close to exact, as well as small, upper bound on the compressed size.
|
||||
* They are coded as constants here for a reason--if the #define's are
|
||||
* changed, then this function needs to be changed as well. The return
|
||||
* value for 15 and 8 only works for those exact settings.
|
||||
*
|
||||
* For any setting other than those defaults for windowBits and memLevel,
|
||||
* the value returned is a conservative worst case for the maximum expansion
|
||||
* resulting from using fixed blocks instead of stored blocks, which deflate
|
||||
* can emit on compressed data for some combinations of the parameters.
|
||||
*
|
||||
* This function could be more sophisticated to provide closer upper bounds
|
||||
* for every combination of windowBits and memLevel, as well as wrap.
|
||||
* But even the conservative upper bound of about 14% expansion does not
|
||||
* seem onerous for output buffer allocation.
|
||||
*/
|
||||
uLong ZEXPORT deflateBound(strm, sourceLen)
|
||||
z_streamp strm;
|
||||
uLong sourceLen;
|
||||
{
|
||||
deflate_state *s;
|
||||
uLong destLen;
|
||||
|
||||
/* conservative upper bound */
|
||||
destLen = sourceLen +
|
||||
((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11;
|
||||
|
||||
/* if can't get parameters, return conservative bound */
|
||||
if (strm == Z_NULL || strm->state == Z_NULL)
|
||||
return destLen;
|
||||
|
||||
/* if not default parameters, return conservative bound */
|
||||
s = strm->state;
|
||||
if (s->w_bits != 15 || s->hash_bits != 8 + 7)
|
||||
return destLen;
|
||||
|
||||
/* default settings: return tight bound for that case */
|
||||
return compressBound(sourceLen);
|
||||
}
|
||||
|
||||
/* =========================================================================
|
||||
* Put a short in the pending buffer. The 16-bit value is put in MSB order.
|
||||
* IN assertion: the stream state is correct and there is enough room in
|
||||
|
|
@ -405,7 +492,7 @@ local void putShortMSB (s, b)
|
|||
{
|
||||
put_byte(s, (Byte)(b >> 8));
|
||||
put_byte(s, (Byte)(b & 0xff));
|
||||
}
|
||||
}
|
||||
|
||||
/* =========================================================================
|
||||
* Flush as much pending output as possible. All deflate() output goes
|
||||
|
|
@ -441,14 +528,14 @@ int ZEXPORT deflate (strm, flush)
|
|||
deflate_state *s;
|
||||
|
||||
if (strm == Z_NULL || strm->state == Z_NULL ||
|
||||
flush > Z_FINISH || flush < 0) {
|
||||
flush > Z_FINISH || flush < 0) {
|
||||
return Z_STREAM_ERROR;
|
||||
}
|
||||
s = strm->state;
|
||||
|
||||
if (strm->next_out == Z_NULL ||
|
||||
(strm->next_in == Z_NULL && strm->avail_in != 0) ||
|
||||
(s->status == FINISH_STATE && flush != Z_FINISH)) {
|
||||
(s->status == FINISH_STATE && flush != Z_FINISH)) {
|
||||
ERR_RETURN(strm, Z_STREAM_ERROR);
|
||||
}
|
||||
if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
|
||||
|
|
@ -457,48 +544,75 @@ int ZEXPORT deflate (strm, flush)
|
|||
old_flush = s->last_flush;
|
||||
s->last_flush = flush;
|
||||
|
||||
/* Write the zlib header */
|
||||
/* Write the header */
|
||||
if (s->status == INIT_STATE) {
|
||||
#ifdef GZIP
|
||||
if (s->wrap == 2) {
|
||||
put_byte(s, 31);
|
||||
put_byte(s, 139);
|
||||
put_byte(s, 8);
|
||||
put_byte(s, 0);
|
||||
put_byte(s, 0);
|
||||
put_byte(s, 0);
|
||||
put_byte(s, 0);
|
||||
put_byte(s, 0);
|
||||
put_byte(s, s->level == 9 ? 2 :
|
||||
(s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
|
||||
4 : 0));
|
||||
put_byte(s, 255);
|
||||
s->status = BUSY_STATE;
|
||||
strm->adler = crc32(0L, Z_NULL, 0);
|
||||
}
|
||||
else
|
||||
#endif
|
||||
{
|
||||
uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
|
||||
uInt level_flags;
|
||||
|
||||
uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
|
||||
uInt level_flags = (s->level-1) >> 1;
|
||||
if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)
|
||||
level_flags = 0;
|
||||
else if (s->level < 6)
|
||||
level_flags = 1;
|
||||
else if (s->level == 6)
|
||||
level_flags = 2;
|
||||
else
|
||||
level_flags = 3;
|
||||
header |= (level_flags << 6);
|
||||
if (s->strstart != 0) header |= PRESET_DICT;
|
||||
header += 31 - (header % 31);
|
||||
|
||||
if (level_flags > 3) level_flags = 3;
|
||||
header |= (level_flags << 6);
|
||||
if (s->strstart != 0) header |= PRESET_DICT;
|
||||
header += 31 - (header % 31);
|
||||
s->status = BUSY_STATE;
|
||||
putShortMSB(s, header);
|
||||
|
||||
s->status = BUSY_STATE;
|
||||
putShortMSB(s, header);
|
||||
|
||||
/* Save the adler32 of the preset dictionary: */
|
||||
if (s->strstart != 0) {
|
||||
putShortMSB(s, (uInt)(strm->adler >> 16));
|
||||
putShortMSB(s, (uInt)(strm->adler & 0xffff));
|
||||
}
|
||||
strm->adler = 1L;
|
||||
/* Save the adler32 of the preset dictionary: */
|
||||
if (s->strstart != 0) {
|
||||
putShortMSB(s, (uInt)(strm->adler >> 16));
|
||||
putShortMSB(s, (uInt)(strm->adler & 0xffff));
|
||||
}
|
||||
strm->adler = adler32(0L, Z_NULL, 0);
|
||||
}
|
||||
}
|
||||
|
||||
/* Flush as much pending output as possible */
|
||||
if (s->pending != 0) {
|
||||
flush_pending(strm);
|
||||
if (strm->avail_out == 0) {
|
||||
/* Since avail_out is 0, deflate will be called again with
|
||||
* more output space, but possibly with both pending and
|
||||
* avail_in equal to zero. There won't be anything to do,
|
||||
* but this is not an error situation so make sure we
|
||||
* return OK instead of BUF_ERROR at next call of deflate:
|
||||
/* Since avail_out is 0, deflate will be called again with
|
||||
* more output space, but possibly with both pending and
|
||||
* avail_in equal to zero. There won't be anything to do,
|
||||
* but this is not an error situation so make sure we
|
||||
* return OK instead of BUF_ERROR at next call of deflate:
|
||||
*/
|
||||
s->last_flush = -1;
|
||||
return Z_OK;
|
||||
}
|
||||
s->last_flush = -1;
|
||||
return Z_OK;
|
||||
}
|
||||
|
||||
/* Make sure there is something to do and avoid duplicate consecutive
|
||||
* flushes. For repeated and useless calls with Z_FINISH, we keep
|
||||
* returning Z_STREAM_END instead of Z_BUFF_ERROR.
|
||||
* returning Z_STREAM_END instead of Z_BUF_ERROR.
|
||||
*/
|
||||
} else if (strm->avail_in == 0 && flush <= old_flush &&
|
||||
flush != Z_FINISH) {
|
||||
flush != Z_FINISH) {
|
||||
ERR_RETURN(strm, Z_BUF_ERROR);
|
||||
}
|
||||
|
||||
|
|
@ -513,24 +627,24 @@ int ZEXPORT deflate (strm, flush)
|
|||
(flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
|
||||
block_state bstate;
|
||||
|
||||
bstate = (*(configuration_table[s->level].func))(s, flush);
|
||||
bstate = (*(configuration_table[s->level].func))(s, flush);
|
||||
|
||||
if (bstate == finish_started || bstate == finish_done) {
|
||||
s->status = FINISH_STATE;
|
||||
}
|
||||
if (bstate == need_more || bstate == finish_started) {
|
||||
if (strm->avail_out == 0) {
|
||||
s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
|
||||
}
|
||||
return Z_OK;
|
||||
/* If flush != Z_NO_FLUSH && avail_out == 0, the next call
|
||||
* of deflate should use the same flush parameter to make sure
|
||||
* that the flush is complete. So we don't have to output an
|
||||
* empty block here, this will be done at next call. This also
|
||||
* ensures that for a very small output buffer, we emit at most
|
||||
* one empty block.
|
||||
*/
|
||||
}
|
||||
if (strm->avail_out == 0) {
|
||||
s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
|
||||
}
|
||||
return Z_OK;
|
||||
/* If flush != Z_NO_FLUSH && avail_out == 0, the next call
|
||||
* of deflate should use the same flush parameter to make sure
|
||||
* that the flush is complete. So we don't have to output an
|
||||
* empty block here, this will be done at next call. This also
|
||||
* ensures that for a very small output buffer, we emit at most
|
||||
* one empty block.
|
||||
*/
|
||||
}
|
||||
if (bstate == block_done) {
|
||||
if (flush == Z_PARTIAL_FLUSH) {
|
||||
_tr_align(s);
|
||||
|
|
@ -544,25 +658,40 @@ int ZEXPORT deflate (strm, flush)
|
|||
}
|
||||
}
|
||||
flush_pending(strm);
|
||||
if (strm->avail_out == 0) {
|
||||
s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
|
||||
return Z_OK;
|
||||
}
|
||||
if (strm->avail_out == 0) {
|
||||
s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
|
||||
return Z_OK;
|
||||
}
|
||||
}
|
||||
}
|
||||
Assert(strm->avail_out > 0, "bug2");
|
||||
|
||||
if (flush != Z_FINISH) return Z_OK;
|
||||
if (s->noheader) return Z_STREAM_END;
|
||||
if (s->wrap <= 0) return Z_STREAM_END;
|
||||
|
||||
/* Write the zlib trailer (adler32) */
|
||||
putShortMSB(s, (uInt)(strm->adler >> 16));
|
||||
putShortMSB(s, (uInt)(strm->adler & 0xffff));
|
||||
/* Write the trailer */
|
||||
#ifdef GZIP
|
||||
if (s->wrap == 2) {
|
||||
put_byte(s, (Byte)(strm->adler & 0xff));
|
||||
put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
|
||||
put_byte(s, (Byte)((strm->adler >> 16) & 0xff));
|
||||
put_byte(s, (Byte)((strm->adler >> 24) & 0xff));
|
||||
put_byte(s, (Byte)(strm->total_in & 0xff));
|
||||
put_byte(s, (Byte)((strm->total_in >> 8) & 0xff));
|
||||
put_byte(s, (Byte)((strm->total_in >> 16) & 0xff));
|
||||
put_byte(s, (Byte)((strm->total_in >> 24) & 0xff));
|
||||
}
|
||||
else
|
||||
#endif
|
||||
{
|
||||
putShortMSB(s, (uInt)(strm->adler >> 16));
|
||||
putShortMSB(s, (uInt)(strm->adler & 0xffff));
|
||||
}
|
||||
flush_pending(strm);
|
||||
/* If avail_out is zero, the application will call deflate again
|
||||
* to flush the rest.
|
||||
*/
|
||||
s->noheader = -1; /* write the trailer only once! */
|
||||
if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */
|
||||
return s->pending != 0 ? Z_OK : Z_STREAM_END;
|
||||
}
|
||||
|
||||
|
|
@ -576,7 +705,7 @@ int ZEXPORT deflateEnd (strm)
|
|||
|
||||
status = strm->state->status;
|
||||
if (status != INIT_STATE && status != BUSY_STATE &&
|
||||
status != FINISH_STATE) {
|
||||
status != FINISH_STATE) {
|
||||
return Z_STREAM_ERROR;
|
||||
}
|
||||
|
||||
|
|
@ -649,7 +778,7 @@ int ZEXPORT deflateCopy (dest, source)
|
|||
ds->bl_desc.dyn_tree = ds->bl_tree;
|
||||
|
||||
return Z_OK;
|
||||
#endif
|
||||
#endif /* MAXSEG_64K */
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
|
|
@ -671,9 +800,14 @@ local int read_buf(strm, buf, size)
|
|||
|
||||
strm->avail_in -= len;
|
||||
|
||||
if (!strm->state->noheader) {
|
||||
if (strm->state->wrap == 1) {
|
||||
strm->adler = adler32(strm->adler, strm->next_in, len);
|
||||
}
|
||||
#ifdef GZIP
|
||||
else if (strm->state->wrap == 2) {
|
||||
strm->adler = crc32(strm->adler, strm->next_in, len);
|
||||
}
|
||||
#endif
|
||||
zmemcpy(buf, strm->next_in, len);
|
||||
strm->next_in += len;
|
||||
strm->total_in += len;
|
||||
|
|
@ -709,6 +843,7 @@ local void lm_init (s)
|
|||
#endif
|
||||
}
|
||||
|
||||
#ifndef FASTEST
|
||||
/* ===========================================================================
|
||||
* Set match_start to the longest match starting at the given string and
|
||||
* return its length. Matches shorter or equal to prev_length are discarded,
|
||||
|
|
@ -722,7 +857,6 @@ local void lm_init (s)
|
|||
/* For 80x86 and 680x0, an optimized version will be provided in match.asm or
|
||||
* match.S. The code will be functionally equivalent.
|
||||
*/
|
||||
#ifndef FASTEST
|
||||
local uInt longest_match(s, cur_match)
|
||||
deflate_state *s;
|
||||
IPos cur_match; /* current match */
|
||||
|
|
@ -860,12 +994,13 @@ local uInt longest_match(s, cur_match)
|
|||
if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
|
||||
return s->lookahead;
|
||||
}
|
||||
#endif /* ASMV */
|
||||
#endif /* FASTEST */
|
||||
|
||||
#else /* FASTEST */
|
||||
/* ---------------------------------------------------------------------------
|
||||
* Optimized version for level == 1 only
|
||||
* Optimized version for level == 1 or strategy == Z_RLE only
|
||||
*/
|
||||
local uInt longest_match(s, cur_match)
|
||||
local uInt longest_match_fast(s, cur_match)
|
||||
deflate_state *s;
|
||||
IPos cur_match; /* current match */
|
||||
{
|
||||
|
|
@ -903,10 +1038,10 @@ local uInt longest_match(s, cur_match)
|
|||
*/
|
||||
do {
|
||||
} while (*++scan == *++match && *++scan == *++match &&
|
||||
*++scan == *++match && *++scan == *++match &&
|
||||
*++scan == *++match && *++scan == *++match &&
|
||||
*++scan == *++match && *++scan == *++match &&
|
||||
scan < strend);
|
||||
*++scan == *++match && *++scan == *++match &&
|
||||
*++scan == *++match && *++scan == *++match &&
|
||||
*++scan == *++match && *++scan == *++match &&
|
||||
scan < strend);
|
||||
|
||||
Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
|
||||
|
||||
|
|
@ -915,10 +1050,8 @@ local uInt longest_match(s, cur_match)
|
|||
if (len < MIN_MATCH) return MIN_MATCH - 1;
|
||||
|
||||
s->match_start = cur_match;
|
||||
return len <= s->lookahead ? len : s->lookahead;
|
||||
return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead;
|
||||
}
|
||||
#endif /* FASTEST */
|
||||
#endif /* ASMV */
|
||||
|
||||
#ifdef DEBUG
|
||||
/* ===========================================================================
|
||||
|
|
@ -933,10 +1066,10 @@ local void check_match(s, start, match, length)
|
|||
if (zmemcmp(s->window + match,
|
||||
s->window + start, length) != EQUAL) {
|
||||
fprintf(stderr, " start %u, match %u, length %d\n",
|
||||
start, match, length);
|
||||
start, match, length);
|
||||
do {
|
||||
fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
|
||||
} while (--length != 0);
|
||||
fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
|
||||
} while (--length != 0);
|
||||
z_error("invalid match");
|
||||
}
|
||||
if (z_verbose > 1) {
|
||||
|
|
@ -946,7 +1079,7 @@ local void check_match(s, start, match, length)
|
|||
}
|
||||
#else
|
||||
# define check_match(s, start, match, length)
|
||||
#endif
|
||||
#endif /* DEBUG */
|
||||
|
||||
/* ===========================================================================
|
||||
* Fill the window when the lookahead becomes insufficient.
|
||||
|
|
@ -970,19 +1103,22 @@ local void fill_window(s)
|
|||
more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
|
||||
|
||||
/* Deal with !@#$% 64K limit: */
|
||||
if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
|
||||
more = wsize;
|
||||
if (sizeof(int) <= 2) {
|
||||
if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
|
||||
more = wsize;
|
||||
|
||||
} else if (more == (unsigned)(-1)) {
|
||||
/* Very unlikely, but possible on 16 bit machine if strstart == 0
|
||||
* and lookahead == 1 (input done one byte at time)
|
||||
*/
|
||||
more--;
|
||||
} else if (more == (unsigned)(-1)) {
|
||||
/* Very unlikely, but possible on 16 bit machine if
|
||||
* strstart == 0 && lookahead == 1 (input done a byte at time)
|
||||
*/
|
||||
more--;
|
||||
}
|
||||
}
|
||||
|
||||
/* If the window is almost full and there is insufficient lookahead,
|
||||
* move the upper half to the lower one to make room in the upper half.
|
||||
*/
|
||||
} else if (s->strstart >= wsize+MAX_DIST(s)) {
|
||||
if (s->strstart >= wsize+MAX_DIST(s)) {
|
||||
|
||||
zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
|
||||
s->match_start -= wsize;
|
||||
|
|
@ -995,23 +1131,23 @@ local void fill_window(s)
|
|||
later. (Using level 0 permanently is not an optimal usage of
|
||||
zlib, so we don't care about this pathological case.)
|
||||
*/
|
||||
n = s->hash_size;
|
||||
p = &s->head[n];
|
||||
do {
|
||||
m = *--p;
|
||||
*p = (Pos)(m >= wsize ? m-wsize : NIL);
|
||||
} while (--n);
|
||||
n = s->hash_size;
|
||||
p = &s->head[n];
|
||||
do {
|
||||
m = *--p;
|
||||
*p = (Pos)(m >= wsize ? m-wsize : NIL);
|
||||
} while (--n);
|
||||
|
||||
n = wsize;
|
||||
n = wsize;
|
||||
#ifndef FASTEST
|
||||
p = &s->prev[n];
|
||||
do {
|
||||
m = *--p;
|
||||
*p = (Pos)(m >= wsize ? m-wsize : NIL);
|
||||
/* If n is not on any hash chain, prev[n] is garbage but
|
||||
* its value will never be used.
|
||||
*/
|
||||
} while (--n);
|
||||
p = &s->prev[n];
|
||||
do {
|
||||
m = *--p;
|
||||
*p = (Pos)(m >= wsize ? m-wsize : NIL);
|
||||
/* If n is not on any hash chain, prev[n] is garbage but
|
||||
* its value will never be used.
|
||||
*/
|
||||
} while (--n);
|
||||
#endif
|
||||
more += wsize;
|
||||
}
|
||||
|
|
@ -1056,8 +1192,8 @@ local void fill_window(s)
|
|||
_tr_flush_block(s, (s->block_start >= 0L ? \
|
||||
(charf *)&s->window[(unsigned)s->block_start] : \
|
||||
(charf *)Z_NULL), \
|
||||
(ulg)((long)s->strstart - s->block_start), \
|
||||
(eof)); \
|
||||
(ulg)((long)s->strstart - s->block_start), \
|
||||
(eof)); \
|
||||
s->block_start = s->strstart; \
|
||||
flush_pending(s->strm); \
|
||||
Tracev((stderr,"[FLUSH]")); \
|
||||
|
|
@ -1098,32 +1234,32 @@ local block_state deflate_stored(s, flush)
|
|||
if (s->lookahead <= 1) {
|
||||
|
||||
Assert(s->strstart < s->w_size+MAX_DIST(s) ||
|
||||
s->block_start >= (long)s->w_size, "slide too late");
|
||||
s->block_start >= (long)s->w_size, "slide too late");
|
||||
|
||||
fill_window(s);
|
||||
if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
|
||||
|
||||
if (s->lookahead == 0) break; /* flush the current block */
|
||||
}
|
||||
Assert(s->block_start >= 0L, "block gone");
|
||||
Assert(s->block_start >= 0L, "block gone");
|
||||
|
||||
s->strstart += s->lookahead;
|
||||
s->lookahead = 0;
|
||||
s->strstart += s->lookahead;
|
||||
s->lookahead = 0;
|
||||
|
||||
/* Emit a stored block if pending_buf will be full: */
|
||||
max_start = s->block_start + max_block_size;
|
||||
/* Emit a stored block if pending_buf will be full: */
|
||||
max_start = s->block_start + max_block_size;
|
||||
if (s->strstart == 0 || (ulg)s->strstart >= max_start) {
|
||||
/* strstart == 0 is possible when wraparound on 16-bit machine */
|
||||
s->lookahead = (uInt)(s->strstart - max_start);
|
||||
s->strstart = (uInt)max_start;
|
||||
/* strstart == 0 is possible when wraparound on 16-bit machine */
|
||||
s->lookahead = (uInt)(s->strstart - max_start);
|
||||
s->strstart = (uInt)max_start;
|
||||
FLUSH_BLOCK(s, 0);
|
||||
}
|
||||
/* Flush if we may have to slide, otherwise block_start may become
|
||||
}
|
||||
/* Flush if we may have to slide, otherwise block_start may become
|
||||
* negative and the data will be gone:
|
||||
*/
|
||||
if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {
|
||||
FLUSH_BLOCK(s, 0);
|
||||
}
|
||||
}
|
||||
}
|
||||
FLUSH_BLOCK(s, flush == Z_FINISH);
|
||||
return flush == Z_FINISH ? finish_done : block_done;
|
||||
|
|
@ -1152,8 +1288,8 @@ local block_state deflate_fast(s, flush)
|
|||
if (s->lookahead < MIN_LOOKAHEAD) {
|
||||
fill_window(s);
|
||||
if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
|
||||
return need_more;
|
||||
}
|
||||
return need_more;
|
||||
}
|
||||
if (s->lookahead == 0) break; /* flush the current block */
|
||||
}
|
||||
|
||||
|
|
@ -1172,10 +1308,19 @@ local block_state deflate_fast(s, flush)
|
|||
* of window index 0 (in particular we have to avoid a match
|
||||
* of the string with itself at the start of the input file).
|
||||
*/
|
||||
if (s->strategy != Z_HUFFMAN_ONLY) {
|
||||
s->match_length = longest_match (s, hash_head);
|
||||
#ifdef FASTEST
|
||||
if ((s->strategy < Z_HUFFMAN_ONLY) ||
|
||||
(s->strategy == Z_RLE && s->strstart - hash_head == 1)) {
|
||||
s->match_length = longest_match_fast (s, hash_head);
|
||||
}
|
||||
/* longest_match() sets match_start */
|
||||
#else
|
||||
if (s->strategy < Z_HUFFMAN_ONLY) {
|
||||
s->match_length = longest_match (s, hash_head);
|
||||
} else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
|
||||
s->match_length = longest_match_fast (s, hash_head);
|
||||
}
|
||||
#endif
|
||||
/* longest_match() or longest_match_fast() sets match_start */
|
||||
}
|
||||
if (s->match_length >= MIN_MATCH) {
|
||||
check_match(s, s->strstart, s->match_start, s->match_length);
|
||||
|
|
@ -1191,7 +1336,7 @@ local block_state deflate_fast(s, flush)
|
|||
#ifndef FASTEST
|
||||
if (s->match_length <= s->max_insert_length &&
|
||||
s->lookahead >= MIN_MATCH) {
|
||||
s->match_length--; /* string at strstart already in hash table */
|
||||
s->match_length--; /* string at strstart already in table */
|
||||
do {
|
||||
s->strstart++;
|
||||
INSERT_STRING(s, s->strstart, hash_head);
|
||||
|
|
@ -1199,10 +1344,10 @@ local block_state deflate_fast(s, flush)
|
|||
* always MIN_MATCH bytes ahead.
|
||||
*/
|
||||
} while (--s->match_length != 0);
|
||||
s->strstart++;
|
||||
s->strstart++;
|
||||
} else
|
||||
#endif
|
||||
{
|
||||
{
|
||||
s->strstart += s->match_length;
|
||||
s->match_length = 0;
|
||||
s->ins_h = s->window[s->strstart];
|
||||
|
|
@ -1219,7 +1364,7 @@ local block_state deflate_fast(s, flush)
|
|||
Tracevv((stderr,"%c", s->window[s->strstart]));
|
||||
_tr_tally_lit (s, s->window[s->strstart], bflush);
|
||||
s->lookahead--;
|
||||
s->strstart++;
|
||||
s->strstart++;
|
||||
}
|
||||
if (bflush) FLUSH_BLOCK(s, 0);
|
||||
}
|
||||
|
|
@ -1227,6 +1372,7 @@ local block_state deflate_fast(s, flush)
|
|||
return flush == Z_FINISH ? finish_done : block_done;
|
||||
}
|
||||
|
||||
#ifndef FASTEST
|
||||
/* ===========================================================================
|
||||
* Same as above, but achieves better compression. We use a lazy
|
||||
* evaluation for matches: a match is finally adopted only if there is
|
||||
|
|
@ -1249,8 +1395,8 @@ local block_state deflate_slow(s, flush)
|
|||
if (s->lookahead < MIN_LOOKAHEAD) {
|
||||
fill_window(s);
|
||||
if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
|
||||
return need_more;
|
||||
}
|
||||
return need_more;
|
||||
}
|
||||
if (s->lookahead == 0) break; /* flush the current block */
|
||||
}
|
||||
|
||||
|
|
@ -1272,14 +1418,19 @@ local block_state deflate_slow(s, flush)
|
|||
* of window index 0 (in particular we have to avoid a match
|
||||
* of the string with itself at the start of the input file).
|
||||
*/
|
||||
if (s->strategy != Z_HUFFMAN_ONLY) {
|
||||
if (s->strategy < Z_HUFFMAN_ONLY) {
|
||||
s->match_length = longest_match (s, hash_head);
|
||||
} else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
|
||||
s->match_length = longest_match_fast (s, hash_head);
|
||||
}
|
||||
/* longest_match() sets match_start */
|
||||
/* longest_match() or longest_match_fast() sets match_start */
|
||||
|
||||
if (s->match_length <= 5 && (s->strategy == Z_FILTERED ||
|
||||
(s->match_length == MIN_MATCH &&
|
||||
s->strstart - s->match_start > TOO_FAR))) {
|
||||
if (s->match_length <= 5 && (s->strategy == Z_FILTERED
|
||||
#if TOO_FAR <= 32767
|
||||
|| (s->match_length == MIN_MATCH &&
|
||||
s->strstart - s->match_start > TOO_FAR)
|
||||
#endif
|
||||
)) {
|
||||
|
||||
/* If prev_match is also MIN_MATCH, match_start is garbage
|
||||
* but we will ignore the current match anyway.
|
||||
|
|
@ -1297,7 +1448,7 @@ local block_state deflate_slow(s, flush)
|
|||
check_match(s, s->strstart-1, s->prev_match, s->prev_length);
|
||||
|
||||
_tr_tally_dist(s, s->strstart -1 - s->prev_match,
|
||||
s->prev_length - MIN_MATCH, bflush);
|
||||
s->prev_length - MIN_MATCH, bflush);
|
||||
|
||||
/* Insert in hash table all strings up to the end of the match.
|
||||
* strstart-1 and strstart are already inserted. If there is not
|
||||
|
|
@ -1323,8 +1474,8 @@ local block_state deflate_slow(s, flush)
|
|||
* is longer, truncate the previous match to a single literal.
|
||||
*/
|
||||
Tracevv((stderr,"%c", s->window[s->strstart-1]));
|
||||
_tr_tally_lit(s, s->window[s->strstart-1], bflush);
|
||||
if (bflush) {
|
||||
_tr_tally_lit(s, s->window[s->strstart-1], bflush);
|
||||
if (bflush) {
|
||||
FLUSH_BLOCK_ONLY(s, 0);
|
||||
}
|
||||
s->strstart++;
|
||||
|
|
@ -1348,3 +1499,4 @@ local block_state deflate_slow(s, flush)
|
|||
FLUSH_BLOCK(s, flush == Z_FINISH);
|
||||
return flush == Z_FINISH ? finish_done : block_done;
|
||||
}
|
||||
#endif /* FASTEST */
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/* deflate.h -- internal compression state
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* WARNING: this file should *not* be used by applications. It is
|
||||
|
|
@ -10,11 +10,19 @@
|
|||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#ifndef _DEFLATE_H
|
||||
#define _DEFLATE_H
|
||||
#ifndef DEFLATE_H
|
||||
#define DEFLATE_H
|
||||
|
||||
#include "zutil.h"
|
||||
|
||||
/* define NO_GZIP when compiling if you want to disable gzip header and
|
||||
trailer creation by deflate(). NO_GZIP would be used to avoid linking in
|
||||
the crc code when it is not needed. For shared libraries, gzip encoding
|
||||
should be left enabled. */
|
||||
#ifndef NO_GZIP
|
||||
# define GZIP
|
||||
#endif
|
||||
|
||||
/* ===========================================================================
|
||||
* Internal compression state.
|
||||
*/
|
||||
|
|
@ -86,7 +94,7 @@ typedef struct internal_state {
|
|||
ulg pending_buf_size; /* size of pending_buf */
|
||||
Bytef *pending_out; /* next pending byte to output to the stream */
|
||||
int pending; /* nb of bytes in the pending buffer */
|
||||
int noheader; /* suppress zlib header and adler32 */
|
||||
int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
|
||||
Byte data_type; /* UNKNOWN, BINARY or ASCII */
|
||||
Byte method; /* STORED (for zip only) or DEFLATED */
|
||||
int last_flush; /* value of flush param for previous deflate call */
|
||||
|
|
@ -269,7 +277,7 @@ typedef struct internal_state {
|
|||
void _tr_init OF((deflate_state *s));
|
||||
int _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
|
||||
void _tr_flush_block OF((deflate_state *s, charf *buf, ulg stored_len,
|
||||
int eof));
|
||||
int eof));
|
||||
void _tr_align OF((deflate_state *s));
|
||||
void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
|
||||
int eof));
|
||||
|
|
@ -312,7 +320,7 @@ void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
|
|||
#else
|
||||
# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
|
||||
# define _tr_tally_dist(s, distance, length, flush) \
|
||||
flush = _tr_tally(s, distance, length)
|
||||
flush = _tr_tally(s, distance, length)
|
||||
#endif
|
||||
|
||||
#endif
|
||||
#endif /* DEFLATE_H */
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/* example.c -- usage example of the zlib compression library
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
|
@ -37,22 +37,22 @@ const char dictionary[] = "hello";
|
|||
uLong dictId; /* Adler32 value of the dictionary */
|
||||
|
||||
void test_compress OF((Byte *compr, uLong comprLen,
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
void test_gzio OF((const char *out, const char *in,
|
||||
Byte *uncompr, int uncomprLen));
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
void test_gzio OF((const char *fname,
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
void test_deflate OF((Byte *compr, uLong comprLen));
|
||||
void test_inflate OF((Byte *compr, uLong comprLen,
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
void test_large_deflate OF((Byte *compr, uLong comprLen,
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
void test_large_inflate OF((Byte *compr, uLong comprLen,
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
void test_flush OF((Byte *compr, uLong *comprLen));
|
||||
void test_sync OF((Byte *compr, uLong comprLen,
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
void test_dict_deflate OF((Byte *compr, uLong comprLen));
|
||||
void test_dict_inflate OF((Byte *compr, uLong comprLen,
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
Byte *uncompr, uLong uncomprLen));
|
||||
int main OF((int argc, char *argv[]));
|
||||
|
||||
/* ===========================================================================
|
||||
|
|
@ -63,7 +63,7 @@ void test_compress(compr, comprLen, uncompr, uncomprLen)
|
|||
uLong comprLen, uncomprLen;
|
||||
{
|
||||
int err;
|
||||
uLong len = strlen(hello)+1;
|
||||
uLong len = (uLong)strlen(hello)+1;
|
||||
|
||||
err = compress(compr, &comprLen, (const Bytef*)hello, len);
|
||||
CHECK_ERR(err, "compress");
|
||||
|
|
@ -75,7 +75,7 @@ void test_compress(compr, comprLen, uncompr, uncomprLen)
|
|||
|
||||
if (strcmp((char*)uncompr, hello)) {
|
||||
fprintf(stderr, "bad uncompress\n");
|
||||
exit(1);
|
||||
exit(1);
|
||||
} else {
|
||||
printf("uncompress(): %s\n", (char *)uncompr);
|
||||
}
|
||||
|
|
@ -84,18 +84,20 @@ void test_compress(compr, comprLen, uncompr, uncomprLen)
|
|||
/* ===========================================================================
|
||||
* Test read/write of .gz files
|
||||
*/
|
||||
void test_gzio(out, in, uncompr, uncomprLen)
|
||||
const char *out; /* compressed output file */
|
||||
const char *in; /* compressed input file */
|
||||
void test_gzio(fname, uncompr, uncomprLen)
|
||||
const char *fname; /* compressed file name */
|
||||
Byte *uncompr;
|
||||
int uncomprLen;
|
||||
uLong uncomprLen;
|
||||
{
|
||||
#ifdef NO_GZCOMPRESS
|
||||
fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
|
||||
#else
|
||||
int err;
|
||||
int len = strlen(hello)+1;
|
||||
int len = (int)strlen(hello)+1;
|
||||
gzFile file;
|
||||
z_off_t pos;
|
||||
|
||||
file = gzopen(out, "wb");
|
||||
file = gzopen(fname, "wb");
|
||||
if (file == NULL) {
|
||||
fprintf(stderr, "gzopen error\n");
|
||||
exit(1);
|
||||
|
|
@ -103,59 +105,64 @@ void test_gzio(out, in, uncompr, uncomprLen)
|
|||
gzputc(file, 'h');
|
||||
if (gzputs(file, "ello") != 4) {
|
||||
fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
|
||||
exit(1);
|
||||
exit(1);
|
||||
}
|
||||
if (gzprintf(file, ", %s!", "hello") != 8) {
|
||||
fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
|
||||
exit(1);
|
||||
exit(1);
|
||||
}
|
||||
gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
|
||||
gzclose(file);
|
||||
|
||||
file = gzopen(in, "rb");
|
||||
file = gzopen(fname, "rb");
|
||||
if (file == NULL) {
|
||||
fprintf(stderr, "gzopen error\n");
|
||||
exit(1);
|
||||
}
|
||||
strcpy((char*)uncompr, "garbage");
|
||||
|
||||
uncomprLen = gzread(file, uncompr, (unsigned)uncomprLen);
|
||||
if (uncomprLen != len) {
|
||||
if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {
|
||||
fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
|
||||
exit(1);
|
||||
exit(1);
|
||||
}
|
||||
if (strcmp((char*)uncompr, hello)) {
|
||||
fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
|
||||
exit(1);
|
||||
exit(1);
|
||||
} else {
|
||||
printf("gzread(): %s\n", (char *)uncompr);
|
||||
printf("gzread(): %s\n", (char*)uncompr);
|
||||
}
|
||||
|
||||
pos = gzseek(file, -8L, SEEK_CUR);
|
||||
if (pos != 6 || gztell(file) != pos) {
|
||||
fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
|
||||
(long)pos, (long)gztell(file));
|
||||
exit(1);
|
||||
fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
|
||||
(long)pos, (long)gztell(file));
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (gzgetc(file) != ' ') {
|
||||
fprintf(stderr, "gzgetc error\n");
|
||||
exit(1);
|
||||
fprintf(stderr, "gzgetc error\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
gzgets(file, (char*)uncompr, uncomprLen);
|
||||
uncomprLen = strlen((char*)uncompr);
|
||||
if (uncomprLen != 6) { /* "hello!" */
|
||||
fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
|
||||
exit(1);
|
||||
if (gzungetc(' ', file) != ' ') {
|
||||
fprintf(stderr, "gzungetc error\n");
|
||||
exit(1);
|
||||
}
|
||||
if (strcmp((char*)uncompr, hello+7)) {
|
||||
|
||||
gzgets(file, (char*)uncompr, (int)uncomprLen);
|
||||
if (strlen((char*)uncompr) != 7) { /* " hello!" */
|
||||
fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
|
||||
exit(1);
|
||||
}
|
||||
if (strcmp((char*)uncompr, hello + 6)) {
|
||||
fprintf(stderr, "bad gzgets after gzseek\n");
|
||||
exit(1);
|
||||
exit(1);
|
||||
} else {
|
||||
printf("gzgets() after gzseek: %s\n", (char *)uncompr);
|
||||
printf("gzgets() after gzseek: %s\n", (char*)uncompr);
|
||||
}
|
||||
|
||||
gzclose(file);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
|
|
@ -167,7 +174,7 @@ void test_deflate(compr, comprLen)
|
|||
{
|
||||
z_stream c_stream; /* compression stream */
|
||||
int err;
|
||||
int len = strlen(hello)+1;
|
||||
uLong len = (uLong)strlen(hello)+1;
|
||||
|
||||
c_stream.zalloc = (alloc_func)0;
|
||||
c_stream.zfree = (free_func)0;
|
||||
|
|
@ -179,7 +186,7 @@ void test_deflate(compr, comprLen)
|
|||
c_stream.next_in = (Bytef*)hello;
|
||||
c_stream.next_out = compr;
|
||||
|
||||
while (c_stream.total_in != (uLong)len && c_stream.total_out < comprLen) {
|
||||
while (c_stream.total_in != len && c_stream.total_out < comprLen) {
|
||||
c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
|
||||
err = deflate(&c_stream, Z_NO_FLUSH);
|
||||
CHECK_ERR(err, "deflate");
|
||||
|
|
@ -231,7 +238,7 @@ void test_inflate(compr, comprLen, uncompr, uncomprLen)
|
|||
|
||||
if (strcmp((char*)uncompr, hello)) {
|
||||
fprintf(stderr, "bad inflate\n");
|
||||
exit(1);
|
||||
exit(1);
|
||||
} else {
|
||||
printf("inflate(): %s\n", (char *)uncompr);
|
||||
}
|
||||
|
|
@ -266,7 +273,7 @@ void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
|
|||
CHECK_ERR(err, "deflate");
|
||||
if (c_stream.avail_in != 0) {
|
||||
fprintf(stderr, "deflate not greedy\n");
|
||||
exit(1);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/* Feed in already compressed data and switch to no compression: */
|
||||
|
|
@ -286,7 +293,7 @@ void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
|
|||
err = deflate(&c_stream, Z_FINISH);
|
||||
if (err != Z_STREAM_END) {
|
||||
fprintf(stderr, "deflate should report Z_STREAM_END\n");
|
||||
exit(1);
|
||||
exit(1);
|
||||
}
|
||||
err = deflateEnd(&c_stream);
|
||||
CHECK_ERR(err, "deflateEnd");
|
||||
|
|
@ -316,7 +323,7 @@ void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
|
|||
|
||||
for (;;) {
|
||||
d_stream.next_out = uncompr; /* discard the output */
|
||||
d_stream.avail_out = (uInt)uncomprLen;
|
||||
d_stream.avail_out = (uInt)uncomprLen;
|
||||
err = inflate(&d_stream, Z_NO_FLUSH);
|
||||
if (err == Z_STREAM_END) break;
|
||||
CHECK_ERR(err, "large inflate");
|
||||
|
|
@ -327,7 +334,7 @@ void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
|
|||
|
||||
if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
|
||||
fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
|
||||
exit(1);
|
||||
exit(1);
|
||||
} else {
|
||||
printf("large_inflate(): OK\n");
|
||||
}
|
||||
|
|
@ -342,7 +349,7 @@ void test_flush(compr, comprLen)
|
|||
{
|
||||
z_stream c_stream; /* compression stream */
|
||||
int err;
|
||||
int len = strlen(hello)+1;
|
||||
uInt len = (uInt)strlen(hello)+1;
|
||||
|
||||
c_stream.zalloc = (alloc_func)0;
|
||||
c_stream.zfree = (free_func)0;
|
||||
|
|
@ -407,7 +414,7 @@ void test_sync(compr, comprLen, uncompr, uncomprLen)
|
|||
if (err != Z_DATA_ERROR) {
|
||||
fprintf(stderr, "inflate should report DATA_ERROR\n");
|
||||
/* Because of incorrect adler32 */
|
||||
exit(1);
|
||||
exit(1);
|
||||
}
|
||||
err = inflateEnd(&d_stream);
|
||||
CHECK_ERR(err, "inflateEnd");
|
||||
|
|
@ -433,7 +440,7 @@ void test_dict_deflate(compr, comprLen)
|
|||
CHECK_ERR(err, "deflateInit");
|
||||
|
||||
err = deflateSetDictionary(&c_stream,
|
||||
(const Bytef*)dictionary, sizeof(dictionary));
|
||||
(const Bytef*)dictionary, sizeof(dictionary));
|
||||
CHECK_ERR(err, "deflateSetDictionary");
|
||||
|
||||
dictId = c_stream.adler;
|
||||
|
|
@ -446,7 +453,7 @@ void test_dict_deflate(compr, comprLen)
|
|||
err = deflate(&c_stream, Z_FINISH);
|
||||
if (err != Z_STREAM_END) {
|
||||
fprintf(stderr, "deflate should report Z_STREAM_END\n");
|
||||
exit(1);
|
||||
exit(1);
|
||||
}
|
||||
err = deflateEnd(&c_stream);
|
||||
CHECK_ERR(err, "deflateEnd");
|
||||
|
|
@ -480,14 +487,14 @@ void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
|
|||
for (;;) {
|
||||
err = inflate(&d_stream, Z_NO_FLUSH);
|
||||
if (err == Z_STREAM_END) break;
|
||||
if (err == Z_NEED_DICT) {
|
||||
if (d_stream.adler != dictId) {
|
||||
fprintf(stderr, "unexpected dictionary");
|
||||
exit(1);
|
||||
}
|
||||
err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
|
||||
sizeof(dictionary));
|
||||
}
|
||||
if (err == Z_NEED_DICT) {
|
||||
if (d_stream.adler != dictId) {
|
||||
fprintf(stderr, "unexpected dictionary");
|
||||
exit(1);
|
||||
}
|
||||
err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
|
||||
sizeof(dictionary));
|
||||
}
|
||||
CHECK_ERR(err, "inflate with dict");
|
||||
}
|
||||
|
||||
|
|
@ -496,7 +503,7 @@ void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
|
|||
|
||||
if (strcmp((char*)uncompr, hello)) {
|
||||
fprintf(stderr, "bad inflate with dict\n");
|
||||
exit(1);
|
||||
exit(1);
|
||||
} else {
|
||||
printf("inflate with dictionary: %s\n", (char *)uncompr);
|
||||
}
|
||||
|
|
@ -523,6 +530,9 @@ int main(argc, argv)
|
|||
fprintf(stderr, "warning: different zlib version\n");
|
||||
}
|
||||
|
||||
printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",
|
||||
ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());
|
||||
|
||||
compr = (Byte*)calloc((uInt)comprLen, 1);
|
||||
uncompr = (Byte*)calloc((uInt)uncomprLen, 1);
|
||||
/* compr and uncompr are cleared to avoid reading uninitialized
|
||||
|
|
@ -530,13 +540,12 @@ int main(argc, argv)
|
|||
*/
|
||||
if (compr == Z_NULL || uncompr == Z_NULL) {
|
||||
printf("out of memory\n");
|
||||
exit(1);
|
||||
exit(1);
|
||||
}
|
||||
test_compress(compr, comprLen, uncompr, uncomprLen);
|
||||
|
||||
test_gzio((argc > 1 ? argv[1] : TESTFILE),
|
||||
(argc > 2 ? argv[2] : TESTFILE),
|
||||
uncompr, (int)uncomprLen);
|
||||
uncompr, uncomprLen);
|
||||
|
||||
test_deflate(compr, comprLen);
|
||||
test_inflate(compr, comprLen, uncompr, uncomprLen);
|
||||
|
|
@ -551,6 +560,8 @@ int main(argc, argv)
|
|||
test_dict_deflate(compr, comprLen);
|
||||
test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
|
||||
|
||||
exit(0);
|
||||
return 0; /* to avoid warning */
|
||||
free(compr);
|
||||
free(uncompr);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
516
lib/libz/gzio.c
516
lib/libz/gzio.c
|
|
@ -1,8 +1,8 @@
|
|||
/* gzio.c -- IO on .gz files
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*
|
||||
* Compile this file with -DNO_DEFLATE to avoid the compression code.
|
||||
* Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
|
@ -11,7 +11,13 @@
|
|||
|
||||
#include "zutil.h"
|
||||
|
||||
#ifdef NO_DEFLATE /* for compatiblity with old definition */
|
||||
# define NO_GZCOMPRESS
|
||||
#endif
|
||||
|
||||
#ifndef NO_DUMMY_DECL
|
||||
struct internal_state {int dummy;}; /* for buggy compilers */
|
||||
#endif
|
||||
|
||||
#ifndef Z_BUFSIZE
|
||||
# ifdef MAXSEG_64K
|
||||
|
|
@ -24,10 +30,20 @@ struct internal_state {int dummy;}; /* for buggy compilers */
|
|||
# define Z_PRINTF_BUFSIZE 4096
|
||||
#endif
|
||||
|
||||
#ifdef __MVS__
|
||||
# pragma map (fdopen , "\174\174FDOPEN")
|
||||
FILE *fdopen(int, const char *);
|
||||
#endif
|
||||
|
||||
#ifndef STDC
|
||||
extern voidp malloc OF((uInt size));
|
||||
extern void free OF((voidpf ptr));
|
||||
#endif
|
||||
|
||||
#define ALLOC(size) malloc(size)
|
||||
#define TRYFREE(p) {if (p) free(p);}
|
||||
|
||||
static int gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
|
||||
static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
|
||||
|
||||
/* gzip flag byte */
|
||||
#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
|
||||
|
|
@ -49,7 +65,11 @@ typedef struct gz_stream {
|
|||
char *path; /* path name for debugging only */
|
||||
int transparent; /* 1 if input file is not a .gz file */
|
||||
char mode; /* 'w' or 'r' */
|
||||
long startpos; /* start of compressed data in file (header skipped) */
|
||||
z_off_t start; /* start of compressed data in file (header skipped) */
|
||||
z_off_t in; /* bytes into deflate or inflate */
|
||||
z_off_t out; /* bytes out of deflate or inflate */
|
||||
int back; /* one character push-back */
|
||||
int last; /* true if push-back is last character */
|
||||
} gz_stream;
|
||||
|
||||
|
||||
|
|
@ -65,7 +85,7 @@ local uLong getLong OF((gz_stream *s));
|
|||
Opens a gzip (.gz) file for reading or writing. The mode parameter
|
||||
is as in fopen ("rb" or "wb"). The file is given either by file descriptor
|
||||
or path name (if fd == -1).
|
||||
gz_open return NULL if the file could not be opened or if there was
|
||||
gz_open returns NULL if the file could not be opened or if there was
|
||||
insufficient memory to allocate the (de)compression state; errno
|
||||
can be checked to distinguish the two cases (if errno is zero, the
|
||||
zlib error is Z_MEM_ERROR).
|
||||
|
|
@ -97,6 +117,9 @@ local gzFile gz_open (path, mode, fd)
|
|||
s->file = NULL;
|
||||
s->z_err = Z_OK;
|
||||
s->z_eof = 0;
|
||||
s->in = 0;
|
||||
s->out = 0;
|
||||
s->back = EOF;
|
||||
s->crc = crc32(0L, Z_NULL, 0);
|
||||
s->msg = NULL;
|
||||
s->transparent = 0;
|
||||
|
|
@ -112,19 +135,21 @@ local gzFile gz_open (path, mode, fd)
|
|||
if (*p == 'r') s->mode = 'r';
|
||||
if (*p == 'w' || *p == 'a') s->mode = 'w';
|
||||
if (*p >= '0' && *p <= '9') {
|
||||
level = *p - '0';
|
||||
} else if (*p == 'f') {
|
||||
strategy = Z_FILTERED;
|
||||
} else if (*p == 'h') {
|
||||
strategy = Z_HUFFMAN_ONLY;
|
||||
} else {
|
||||
*m++ = *p; /* copy the mode */
|
||||
}
|
||||
level = *p - '0';
|
||||
} else if (*p == 'f') {
|
||||
strategy = Z_FILTERED;
|
||||
} else if (*p == 'h') {
|
||||
strategy = Z_HUFFMAN_ONLY;
|
||||
} else if (*p == 'R') {
|
||||
strategy = Z_RLE;
|
||||
} else {
|
||||
*m++ = *p; /* copy the mode */
|
||||
}
|
||||
} while (*p++ && m != fmode + sizeof(fmode));
|
||||
if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL;
|
||||
|
||||
|
||||
if (s->mode == 'w') {
|
||||
#ifdef NO_DEFLATE
|
||||
#ifdef NO_GZCOMPRESS
|
||||
err = Z_STREAM_ERROR;
|
||||
#else
|
||||
err = deflateInit2(&(s->stream), level,
|
||||
|
|
@ -163,17 +188,17 @@ local gzFile gz_open (path, mode, fd)
|
|||
*/
|
||||
fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
|
||||
Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
|
||||
s->startpos = 10L;
|
||||
/* We use 10L instead of ftell(s->file) to because ftell causes an
|
||||
s->start = 10L;
|
||||
/* We use 10L instead of ftell(s->file) to because ftell causes an
|
||||
* fflush on some systems. This version of the library doesn't use
|
||||
* startpos anyway in write mode, so this initialization is not
|
||||
* start anyway in write mode, so this initialization is not
|
||||
* necessary.
|
||||
*/
|
||||
} else {
|
||||
check_header(s); /* skip the .gz header */
|
||||
s->startpos = (ftell(s->file) - s->stream.avail_in);
|
||||
check_header(s); /* skip the .gz header */
|
||||
s->start = ftell(s->file) - s->stream.avail_in;
|
||||
}
|
||||
|
||||
|
||||
return (gzFile)s;
|
||||
}
|
||||
|
||||
|
|
@ -218,11 +243,11 @@ int ZEXPORT gzsetparams (file, level, strategy)
|
|||
/* Make room to allow flushing */
|
||||
if (s->stream.avail_out == 0) {
|
||||
|
||||
s->stream.next_out = s->outbuf;
|
||||
if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
|
||||
s->z_err = Z_ERRNO;
|
||||
}
|
||||
s->stream.avail_out = Z_BUFSIZE;
|
||||
s->stream.next_out = s->outbuf;
|
||||
if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
|
||||
s->z_err = Z_ERRNO;
|
||||
}
|
||||
s->stream.avail_out = Z_BUFSIZE;
|
||||
}
|
||||
|
||||
return deflateParams (&(s->stream), level, strategy);
|
||||
|
|
@ -238,14 +263,14 @@ local int get_byte(s)
|
|||
{
|
||||
if (s->z_eof) return EOF;
|
||||
if (s->stream.avail_in == 0) {
|
||||
errno = 0;
|
||||
s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
|
||||
if (s->stream.avail_in == 0) {
|
||||
s->z_eof = 1;
|
||||
if (ferror(s->file)) s->z_err = Z_ERRNO;
|
||||
return EOF;
|
||||
}
|
||||
s->stream.next_in = s->inbuf;
|
||||
errno = 0;
|
||||
s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
|
||||
if (s->stream.avail_in == 0) {
|
||||
s->z_eof = 1;
|
||||
if (ferror(s->file)) s->z_err = Z_ERRNO;
|
||||
return EOF;
|
||||
}
|
||||
s->stream.next_in = s->inbuf;
|
||||
}
|
||||
s->stream.avail_in--;
|
||||
return *(s->stream.next_in)++;
|
||||
|
|
@ -268,43 +293,57 @@ local void check_header(s)
|
|||
uInt len;
|
||||
int c;
|
||||
|
||||
/* Check the gzip magic header */
|
||||
for (len = 0; len < 2; len++) {
|
||||
c = get_byte(s);
|
||||
if (c != gz_magic[len]) {
|
||||
if (len != 0) s->stream.avail_in++, s->stream.next_in--;
|
||||
if (c != EOF) {
|
||||
s->stream.avail_in++, s->stream.next_in--;
|
||||
s->transparent = 1;
|
||||
}
|
||||
s->z_err = s->stream.avail_in != 0 ? Z_OK : Z_STREAM_END;
|
||||
return;
|
||||
}
|
||||
/* Assure two bytes in the buffer so we can peek ahead -- handle case
|
||||
where first byte of header is at the end of the buffer after the last
|
||||
gzip segment */
|
||||
len = s->stream.avail_in;
|
||||
if (len < 2) {
|
||||
if (len) s->inbuf[0] = s->stream.next_in[0];
|
||||
errno = 0;
|
||||
len = fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
|
||||
if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
|
||||
s->stream.avail_in += len;
|
||||
s->stream.next_in = s->inbuf;
|
||||
if (s->stream.avail_in < 2) {
|
||||
s->transparent = s->stream.avail_in;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/* Peek ahead to check the gzip magic header */
|
||||
if (s->stream.next_in[0] != gz_magic[0] ||
|
||||
s->stream.next_in[1] != gz_magic[1]) {
|
||||
s->transparent = 1;
|
||||
return;
|
||||
}
|
||||
s->stream.avail_in -= 2;
|
||||
s->stream.next_in += 2;
|
||||
|
||||
/* Check the rest of the gzip header */
|
||||
method = get_byte(s);
|
||||
flags = get_byte(s);
|
||||
if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
|
||||
s->z_err = Z_DATA_ERROR;
|
||||
return;
|
||||
s->z_err = Z_DATA_ERROR;
|
||||
return;
|
||||
}
|
||||
|
||||
/* Discard time, xflags and OS code: */
|
||||
for (len = 0; len < 6; len++) (void)get_byte(s);
|
||||
|
||||
if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */
|
||||
len = (uInt)get_byte(s);
|
||||
len += ((uInt)get_byte(s))<<8;
|
||||
/* len is garbage if EOF but the loop below will quit anyway */
|
||||
while (len-- != 0 && get_byte(s) != EOF) ;
|
||||
len = (uInt)get_byte(s);
|
||||
len += ((uInt)get_byte(s))<<8;
|
||||
/* len is garbage if EOF but the loop below will quit anyway */
|
||||
while (len-- != 0 && get_byte(s) != EOF) ;
|
||||
}
|
||||
if ((flags & ORIG_NAME) != 0) { /* skip the original file name */
|
||||
while ((c = get_byte(s)) != 0 && c != EOF) ;
|
||||
while ((c = get_byte(s)) != 0 && c != EOF) ;
|
||||
}
|
||||
if ((flags & COMMENT) != 0) { /* skip the .gz file comment */
|
||||
while ((c = get_byte(s)) != 0 && c != EOF) ;
|
||||
while ((c = get_byte(s)) != 0 && c != EOF) ;
|
||||
}
|
||||
if ((flags & HEAD_CRC) != 0) { /* skip the header crc */
|
||||
for (len = 0; len < 2; len++) (void)get_byte(s);
|
||||
for (len = 0; len < 2; len++) (void)get_byte(s);
|
||||
}
|
||||
s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK;
|
||||
}
|
||||
|
|
@ -323,21 +362,21 @@ local int destroy (s)
|
|||
TRYFREE(s->msg);
|
||||
|
||||
if (s->stream.state != NULL) {
|
||||
if (s->mode == 'w') {
|
||||
#ifdef NO_DEFLATE
|
||||
err = Z_STREAM_ERROR;
|
||||
if (s->mode == 'w') {
|
||||
#ifdef NO_GZCOMPRESS
|
||||
err = Z_STREAM_ERROR;
|
||||
#else
|
||||
err = deflateEnd(&(s->stream));
|
||||
err = deflateEnd(&(s->stream));
|
||||
#endif
|
||||
} else if (s->mode == 'r') {
|
||||
err = inflateEnd(&(s->stream));
|
||||
}
|
||||
} else if (s->mode == 'r') {
|
||||
err = inflateEnd(&(s->stream));
|
||||
}
|
||||
}
|
||||
if (s->file != NULL && fclose(s->file)) {
|
||||
#ifdef ESPIPE
|
||||
if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */
|
||||
if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */
|
||||
#endif
|
||||
err = Z_ERRNO;
|
||||
err = Z_ERRNO;
|
||||
}
|
||||
if (s->z_err < 0) err = s->z_err;
|
||||
|
||||
|
|
@ -370,71 +409,82 @@ int ZEXPORT gzread (file, buf, len)
|
|||
s->stream.next_out = (Bytef*)buf;
|
||||
s->stream.avail_out = len;
|
||||
|
||||
if (s->stream.avail_out && s->back != EOF) {
|
||||
*next_out++ = s->back;
|
||||
s->stream.next_out++;
|
||||
s->stream.avail_out--;
|
||||
s->back = EOF;
|
||||
s->out++;
|
||||
if (s->last) {
|
||||
s->z_err = Z_STREAM_END;
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
while (s->stream.avail_out != 0) {
|
||||
|
||||
if (s->transparent) {
|
||||
/* Copy first the lookahead bytes: */
|
||||
uInt n = s->stream.avail_in;
|
||||
if (n > s->stream.avail_out) n = s->stream.avail_out;
|
||||
if (n > 0) {
|
||||
zmemcpy(s->stream.next_out, s->stream.next_in, n);
|
||||
next_out += n;
|
||||
s->stream.next_out = next_out;
|
||||
s->stream.next_in += n;
|
||||
s->stream.avail_out -= n;
|
||||
s->stream.avail_in -= n;
|
||||
}
|
||||
if (s->stream.avail_out > 0) {
|
||||
s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
|
||||
s->file);
|
||||
}
|
||||
len -= s->stream.avail_out;
|
||||
s->stream.total_in += (uLong)len;
|
||||
s->stream.total_out += (uLong)len;
|
||||
if (s->transparent) {
|
||||
/* Copy first the lookahead bytes: */
|
||||
uInt n = s->stream.avail_in;
|
||||
if (n > s->stream.avail_out) n = s->stream.avail_out;
|
||||
if (n > 0) {
|
||||
zmemcpy(s->stream.next_out, s->stream.next_in, n);
|
||||
next_out += n;
|
||||
s->stream.next_out = next_out;
|
||||
s->stream.next_in += n;
|
||||
s->stream.avail_out -= n;
|
||||
s->stream.avail_in -= n;
|
||||
}
|
||||
if (s->stream.avail_out > 0) {
|
||||
s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
|
||||
s->file);
|
||||
}
|
||||
len -= s->stream.avail_out;
|
||||
s->in += len;
|
||||
s->out += len;
|
||||
if (len == 0) s->z_eof = 1;
|
||||
return (int)len;
|
||||
}
|
||||
return (int)len;
|
||||
}
|
||||
if (s->stream.avail_in == 0 && !s->z_eof) {
|
||||
|
||||
errno = 0;
|
||||
s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
|
||||
if (s->stream.avail_in == 0) {
|
||||
s->z_eof = 1;
|
||||
if (ferror(s->file)) {
|
||||
s->z_err = Z_ERRNO;
|
||||
break;
|
||||
}
|
||||
if (ferror(s->file)) {
|
||||
s->z_err = Z_ERRNO;
|
||||
break;
|
||||
}
|
||||
}
|
||||
s->stream.next_in = s->inbuf;
|
||||
}
|
||||
s->in += s->stream.avail_in;
|
||||
s->out += s->stream.avail_out;
|
||||
s->z_err = inflate(&(s->stream), Z_NO_FLUSH);
|
||||
s->in -= s->stream.avail_in;
|
||||
s->out -= s->stream.avail_out;
|
||||
|
||||
if (s->z_err == Z_STREAM_END) {
|
||||
/* Check CRC and original size */
|
||||
s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
|
||||
start = s->stream.next_out;
|
||||
if (s->z_err == Z_STREAM_END) {
|
||||
/* Check CRC and original size */
|
||||
s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
|
||||
start = s->stream.next_out;
|
||||
|
||||
if (getLong(s) != s->crc) {
|
||||
s->z_err = Z_DATA_ERROR;
|
||||
} else {
|
||||
(void)getLong(s);
|
||||
/* The uncompressed length returned by above getlong() may
|
||||
* be different from s->stream.total_out) in case of
|
||||
* concatenated .gz files. Check for such files:
|
||||
*/
|
||||
check_header(s);
|
||||
if (s->z_err == Z_OK) {
|
||||
uLong total_in = s->stream.total_in;
|
||||
uLong total_out = s->stream.total_out;
|
||||
|
||||
inflateReset(&(s->stream));
|
||||
s->stream.total_in = total_in;
|
||||
s->stream.total_out = total_out;
|
||||
s->crc = crc32(0L, Z_NULL, 0);
|
||||
}
|
||||
}
|
||||
}
|
||||
if (s->z_err != Z_OK || s->z_eof) break;
|
||||
if (getLong(s) != s->crc) {
|
||||
s->z_err = Z_DATA_ERROR;
|
||||
} else {
|
||||
(void)getLong(s);
|
||||
/* The uncompressed length returned by above getlong() may be
|
||||
* different from s->out in case of concatenated .gz files.
|
||||
* Check for such files:
|
||||
*/
|
||||
check_header(s);
|
||||
if (s->z_err == Z_OK) {
|
||||
inflateReset(&(s->stream));
|
||||
s->crc = crc32(0L, Z_NULL, 0);
|
||||
}
|
||||
}
|
||||
}
|
||||
if (s->z_err != Z_OK || s->z_eof) break;
|
||||
}
|
||||
s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
|
||||
|
||||
|
|
@ -455,6 +505,25 @@ int ZEXPORT gzgetc(file)
|
|||
}
|
||||
|
||||
|
||||
/* ===========================================================================
|
||||
Push one byte back onto the stream.
|
||||
*/
|
||||
int ZEXPORT gzungetc(c, file)
|
||||
int c;
|
||||
gzFile file;
|
||||
{
|
||||
gz_stream *s = (gz_stream*)file;
|
||||
|
||||
if (s == NULL || s->mode != 'r' || c == EOF || s->back != EOF) return EOF;
|
||||
s->back = c;
|
||||
s->out--;
|
||||
s->last = (s->z_err == Z_STREAM_END);
|
||||
if (s->last) s->z_err = Z_OK;
|
||||
s->z_eof = 0;
|
||||
return c;
|
||||
}
|
||||
|
||||
|
||||
/* ===========================================================================
|
||||
Reads bytes from the compressed file until len-1 characters are
|
||||
read, or a newline character is read and transferred to buf, or an
|
||||
|
|
@ -478,14 +547,14 @@ char * ZEXPORT gzgets(file, buf, len)
|
|||
}
|
||||
|
||||
|
||||
#ifndef NO_DEFLATE
|
||||
#ifndef NO_GZCOMPRESS
|
||||
/* ===========================================================================
|
||||
Writes the given number of uncompressed bytes into the compressed file.
|
||||
gzwrite returns the number of bytes actually written (0 in case of error).
|
||||
*/
|
||||
int ZEXPORT gzwrite (file, buf, len)
|
||||
gzFile file;
|
||||
const voidp buf;
|
||||
voidpc buf;
|
||||
unsigned len;
|
||||
{
|
||||
gz_stream *s = (gz_stream*)file;
|
||||
|
|
@ -506,7 +575,11 @@ int ZEXPORT gzwrite (file, buf, len)
|
|||
}
|
||||
s->stream.avail_out = Z_BUFSIZE;
|
||||
}
|
||||
s->in += s->stream.avail_in;
|
||||
s->out += s->stream.avail_out;
|
||||
s->z_err = deflate(&(s->stream), Z_NO_FLUSH);
|
||||
s->in -= s->stream.avail_in;
|
||||
s->out -= s->stream.avail_out;
|
||||
if (s->z_err != Z_OK) break;
|
||||
}
|
||||
s->crc = crc32(s->crc, (const Bytef *)buf, len);
|
||||
|
|
@ -514,6 +587,7 @@ int ZEXPORT gzwrite (file, buf, len)
|
|||
return (int)(len - s->stream.avail_in);
|
||||
}
|
||||
|
||||
|
||||
/* ===========================================================================
|
||||
Converts, formats, and writes the args to the compressed file under
|
||||
control of the format string, as in fprintf. gzprintf returns the number of
|
||||
|
|
@ -528,40 +602,67 @@ int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
|
|||
va_list va;
|
||||
int len;
|
||||
|
||||
buf[sizeof(buf) - 1] = 0;
|
||||
va_start(va, format);
|
||||
#ifdef HAS_vsnprintf
|
||||
(void)vsnprintf(buf, sizeof(buf), format, va);
|
||||
#else
|
||||
#ifdef NO_vsnprintf
|
||||
# ifdef HAS_vsprintf_void
|
||||
(void)vsprintf(buf, format, va);
|
||||
#endif
|
||||
va_end(va);
|
||||
len = strlen(buf); /* some *sprintf don't return the nb of bytes written */
|
||||
if (len <= 0) return 0;
|
||||
|
||||
for (len = 0; len < sizeof(buf); len++)
|
||||
if (buf[len] == 0) break;
|
||||
# else
|
||||
len = vsprintf(buf, format, va);
|
||||
va_end(va);
|
||||
# endif
|
||||
#else
|
||||
# ifdef HAS_vsnprintf_void
|
||||
(void)vsnprintf(buf, sizeof(buf), format, va);
|
||||
va_end(va);
|
||||
len = strlen(buf);
|
||||
# else
|
||||
len = vsnprintf(buf, sizeof(buf), format, va);
|
||||
va_end(va);
|
||||
# endif
|
||||
#endif
|
||||
if (len <= 0 || len >= (int)sizeof(buf) || buf[sizeof(buf) - 1] != 0)
|
||||
return 0;
|
||||
return gzwrite(file, buf, (unsigned)len);
|
||||
}
|
||||
#else /* not ANSI C */
|
||||
|
||||
int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
|
||||
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
|
||||
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
|
||||
gzFile file;
|
||||
const char *format;
|
||||
int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
|
||||
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
|
||||
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
|
||||
{
|
||||
char buf[Z_PRINTF_BUFSIZE];
|
||||
int len;
|
||||
|
||||
#ifdef HAS_snprintf
|
||||
snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
#else
|
||||
buf[sizeof(buf) - 1] = 0;
|
||||
#ifdef NO_snprintf
|
||||
# ifdef HAS_sprintf_void
|
||||
sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
for (len = 0; len < sizeof(buf); len++)
|
||||
if (buf[len] == 0) break;
|
||||
# else
|
||||
len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
# endif
|
||||
#else
|
||||
# ifdef HAS_snprintf_void
|
||||
snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
len = strlen(buf);
|
||||
# else
|
||||
len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
# endif
|
||||
#endif
|
||||
len = strlen(buf); /* old sprintf doesn't return the nb of bytes written */
|
||||
if (len <= 0) return 0;
|
||||
|
||||
if (len <= 0 || len >= sizeof(buf) || buf[sizeof(buf) - 1] != 0)
|
||||
return 0;
|
||||
return gzwrite(file, buf, len);
|
||||
}
|
||||
#endif
|
||||
|
|
@ -621,16 +722,18 @@ local int do_flush (file, flush)
|
|||
s->stream.avail_out = Z_BUFSIZE;
|
||||
}
|
||||
if (done) break;
|
||||
s->out += s->stream.avail_out;
|
||||
s->z_err = deflate(&(s->stream), flush);
|
||||
s->out -= s->stream.avail_out;
|
||||
|
||||
/* Ignore the second of two consecutive flushes: */
|
||||
if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK;
|
||||
/* Ignore the second of two consecutive flushes: */
|
||||
if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK;
|
||||
|
||||
/* deflate has finished flushing only when it hasn't used up
|
||||
* all the available space in the output buffer:
|
||||
* all the available space in the output buffer:
|
||||
*/
|
||||
done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END);
|
||||
|
||||
|
||||
if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
|
||||
}
|
||||
return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
|
||||
|
|
@ -647,7 +750,7 @@ int ZEXPORT gzflush (file, flush)
|
|||
fflush(s->file);
|
||||
return s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
|
||||
}
|
||||
#endif /* NO_DEFLATE */
|
||||
#endif /* NO_GZCOMPRESS */
|
||||
|
||||
/* ===========================================================================
|
||||
Sets the starting position for the next gzread or gzwrite on the given
|
||||
|
|
@ -665,99 +768,105 @@ z_off_t ZEXPORT gzseek (file, offset, whence)
|
|||
gz_stream *s = (gz_stream*)file;
|
||||
|
||||
if (s == NULL || whence == SEEK_END ||
|
||||
s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {
|
||||
return -1L;
|
||||
s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {
|
||||
return -1L;
|
||||
}
|
||||
|
||||
|
||||
if (s->mode == 'w') {
|
||||
#ifdef NO_DEFLATE
|
||||
return -1L;
|
||||
#ifdef NO_GZCOMPRESS
|
||||
return -1L;
|
||||
#else
|
||||
if (whence == SEEK_SET) {
|
||||
offset -= s->stream.total_in;
|
||||
}
|
||||
if (offset < 0) return -1L;
|
||||
if (whence == SEEK_SET) {
|
||||
offset -= s->in;
|
||||
}
|
||||
if (offset < 0) return -1L;
|
||||
|
||||
/* At this point, offset is the number of zero bytes to write. */
|
||||
if (s->inbuf == Z_NULL) {
|
||||
s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
|
||||
zmemzero(s->inbuf, Z_BUFSIZE);
|
||||
}
|
||||
while (offset > 0) {
|
||||
uInt size = Z_BUFSIZE;
|
||||
if (offset < Z_BUFSIZE) size = (uInt)offset;
|
||||
/* At this point, offset is the number of zero bytes to write. */
|
||||
if (s->inbuf == Z_NULL) {
|
||||
s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
|
||||
if (s->inbuf == Z_NULL) return -1L;
|
||||
zmemzero(s->inbuf, Z_BUFSIZE);
|
||||
}
|
||||
while (offset > 0) {
|
||||
uInt size = Z_BUFSIZE;
|
||||
if (offset < Z_BUFSIZE) size = (uInt)offset;
|
||||
|
||||
size = gzwrite(file, s->inbuf, size);
|
||||
if (size == 0) return -1L;
|
||||
size = gzwrite(file, s->inbuf, size);
|
||||
if (size == 0) return -1L;
|
||||
|
||||
offset -= size;
|
||||
}
|
||||
return (z_off_t)s->stream.total_in;
|
||||
offset -= size;
|
||||
}
|
||||
return s->in;
|
||||
#endif
|
||||
}
|
||||
/* Rest of function is for reading only */
|
||||
|
||||
/* compute absolute position */
|
||||
if (whence == SEEK_CUR) {
|
||||
offset += s->stream.total_out;
|
||||
offset += s->out;
|
||||
}
|
||||
if (offset < 0) return -1L;
|
||||
|
||||
if (s->transparent) {
|
||||
/* map to fseek */
|
||||
s->stream.avail_in = 0;
|
||||
s->stream.next_in = s->inbuf;
|
||||
/* map to fseek */
|
||||
s->back = EOF;
|
||||
s->stream.avail_in = 0;
|
||||
s->stream.next_in = s->inbuf;
|
||||
if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
|
||||
|
||||
s->stream.total_in = s->stream.total_out = (uLong)offset;
|
||||
return offset;
|
||||
s->in = s->out = offset;
|
||||
return offset;
|
||||
}
|
||||
|
||||
/* For a negative seek, rewind and use positive seek */
|
||||
if ((uLong)offset >= s->stream.total_out) {
|
||||
offset -= s->stream.total_out;
|
||||
if (offset >= s->out) {
|
||||
offset -= s->out;
|
||||
} else if (gzrewind(file) < 0) {
|
||||
return -1L;
|
||||
return -1L;
|
||||
}
|
||||
/* offset is now the number of bytes to skip. */
|
||||
|
||||
if (offset != 0 && s->outbuf == Z_NULL) {
|
||||
s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
|
||||
s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
|
||||
if (s->outbuf == Z_NULL) return -1L;
|
||||
}
|
||||
if (offset && s->back != EOF) {
|
||||
s->back = EOF;
|
||||
s->out++;
|
||||
offset--;
|
||||
if (s->last) s->z_err = Z_STREAM_END;
|
||||
}
|
||||
while (offset > 0) {
|
||||
int size = Z_BUFSIZE;
|
||||
if (offset < Z_BUFSIZE) size = (int)offset;
|
||||
int size = Z_BUFSIZE;
|
||||
if (offset < Z_BUFSIZE) size = (int)offset;
|
||||
|
||||
size = gzread(file, s->outbuf, (uInt)size);
|
||||
if (size <= 0) return -1L;
|
||||
offset -= size;
|
||||
size = gzread(file, s->outbuf, (uInt)size);
|
||||
if (size <= 0) return -1L;
|
||||
offset -= size;
|
||||
}
|
||||
return (z_off_t)s->stream.total_out;
|
||||
return s->out;
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
Rewinds input file.
|
||||
Rewinds input file.
|
||||
*/
|
||||
int ZEXPORT gzrewind (file)
|
||||
gzFile file;
|
||||
{
|
||||
gz_stream *s = (gz_stream*)file;
|
||||
|
||||
|
||||
if (s == NULL || s->mode != 'r') return -1;
|
||||
|
||||
s->z_err = Z_OK;
|
||||
s->z_eof = 0;
|
||||
s->back = EOF;
|
||||
s->stream.avail_in = 0;
|
||||
s->stream.next_in = s->inbuf;
|
||||
s->crc = crc32(0L, Z_NULL, 0);
|
||||
|
||||
if (s->startpos == 0) { /* not a compressed file */
|
||||
rewind(s->file);
|
||||
return 0;
|
||||
}
|
||||
|
||||
(void) inflateReset(&s->stream);
|
||||
return fseek(s->file, s->startpos, SEEK_SET);
|
||||
if (!s->transparent) (void)inflateReset(&s->stream);
|
||||
s->in = 0;
|
||||
s->out = 0;
|
||||
return fseek(s->file, s->start, SEEK_SET);
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
|
|
@ -779,8 +888,14 @@ int ZEXPORT gzeof (file)
|
|||
gzFile file;
|
||||
{
|
||||
gz_stream *s = (gz_stream*)file;
|
||||
|
||||
return (s == NULL || s->mode != 'r') ? 0 : s->z_eof;
|
||||
|
||||
/* With concatenated compressed files that can have embedded
|
||||
* crc trailers, z_eof is no longer the only/best indicator of EOF
|
||||
* on a gz_stream. Handle end-of-stream error explicitly here.
|
||||
*/
|
||||
if (s == NULL || s->mode != 'r') return 0;
|
||||
if (s->z_eof) return 1;
|
||||
return s->z_err == Z_STREAM_END;
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
|
|
@ -828,14 +943,14 @@ int ZEXPORT gzclose (file)
|
|||
if (s == NULL) return Z_STREAM_ERROR;
|
||||
|
||||
if (s->mode == 'w') {
|
||||
#ifdef NO_DEFLATE
|
||||
return Z_STREAM_ERROR;
|
||||
#ifdef NO_GZCOMPRESS
|
||||
return Z_STREAM_ERROR;
|
||||
#else
|
||||
err = do_flush (file, Z_FINISH);
|
||||
if (err != Z_OK) return destroy((gz_stream*)file);
|
||||
|
||||
putLong (s->file, s->crc);
|
||||
putLong (s->file, s->stream.total_in);
|
||||
putLong (s->file, (uLong)(s->in & 0xffffffff));
|
||||
#endif
|
||||
}
|
||||
return destroy((gz_stream*)file);
|
||||
|
|
@ -848,7 +963,7 @@ int ZEXPORT gzclose (file)
|
|||
errnum is set to Z_ERRNO and the application may consult errno
|
||||
to get the exact error code.
|
||||
*/
|
||||
const char* ZEXPORT gzerror (file, errnum)
|
||||
const char * ZEXPORT gzerror (file, errnum)
|
||||
gzFile file;
|
||||
int *errnum;
|
||||
{
|
||||
|
|
@ -862,14 +977,29 @@ const char* ZEXPORT gzerror (file, errnum)
|
|||
*errnum = s->z_err;
|
||||
if (*errnum == Z_OK) return (const char*)"";
|
||||
|
||||
m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
|
||||
m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
|
||||
|
||||
if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
|
||||
|
||||
TRYFREE(s->msg);
|
||||
s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
|
||||
if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR);
|
||||
strcpy(s->msg, s->path);
|
||||
strcat(s->msg, ": ");
|
||||
strcat(s->msg, m);
|
||||
return (const char*)s->msg;
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
Clear the error and end-of-file flags, and do the same for the real file.
|
||||
*/
|
||||
void ZEXPORT gzclearerr (file)
|
||||
gzFile file;
|
||||
{
|
||||
gz_stream *s = (gz_stream*)file;
|
||||
|
||||
if (s == NULL) return;
|
||||
if (s->z_err != Z_STREAM_END) s->z_err = Z_OK;
|
||||
s->z_eof = 0;
|
||||
clearerr(s->file);
|
||||
}
|
||||
|
|
|
|||
619
lib/libz/infback.c
Normal file
619
lib/libz/infback.c
Normal file
|
|
@ -0,0 +1,619 @@
|
|||
/* infback.c -- inflate using a call-back interface
|
||||
* Copyright (C) 1995-2003 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/*
|
||||
This code is largely copied from inflate.c. Normally either infback.o or
|
||||
inflate.o would be linked into an application--not both. The interface
|
||||
with inffast.c is retained so that optimized assembler-coded versions of
|
||||
inflate_fast() can be used with either inflate.c or infback.c.
|
||||
*/
|
||||
|
||||
#include "zutil.h"
|
||||
#include "inftrees.h"
|
||||
#include "inflate.h"
|
||||
#include "inffast.h"
|
||||
|
||||
/* function prototypes */
|
||||
local void fixedtables OF((struct inflate_state FAR *state));
|
||||
|
||||
/*
|
||||
strm provides memory allocation functions in zalloc and zfree, or
|
||||
Z_NULL to use the library memory allocation functions.
|
||||
|
||||
windowBits is in the range 8..15, and window is a user-supplied
|
||||
window and output buffer that is 2**windowBits bytes.
|
||||
*/
|
||||
int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
|
||||
z_stream FAR *strm;
|
||||
int windowBits;
|
||||
unsigned char FAR *window;
|
||||
const char *version;
|
||||
int stream_size;
|
||||
{
|
||||
struct inflate_state FAR *state;
|
||||
|
||||
if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
|
||||
stream_size != (int)(sizeof(z_stream)))
|
||||
return Z_VERSION_ERROR;
|
||||
if (strm == Z_NULL || window == Z_NULL ||
|
||||
windowBits < 8 || windowBits > 15)
|
||||
return Z_STREAM_ERROR;
|
||||
strm->msg = Z_NULL; /* in case we return an error */
|
||||
if (strm->zalloc == (alloc_func)0) {
|
||||
strm->zalloc = zcalloc;
|
||||
strm->opaque = (voidpf)0;
|
||||
}
|
||||
if (strm->zfree == (free_func)0) strm->zfree = zcfree;
|
||||
state = (struct inflate_state FAR *)ZALLOC(strm, 1,
|
||||
sizeof(struct inflate_state));
|
||||
if (state == Z_NULL) return Z_MEM_ERROR;
|
||||
Tracev((stderr, "inflate: allocated\n"));
|
||||
strm->state = (voidpf)state;
|
||||
state->wbits = windowBits;
|
||||
state->wsize = 1U << windowBits;
|
||||
state->window = window;
|
||||
state->write = 0;
|
||||
state->whave = 0;
|
||||
return Z_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
Return state with length and distance decoding tables and index sizes set to
|
||||
fixed code decoding. Normally this returns fixed tables from inffixed.h.
|
||||
If BUILDFIXED is defined, then instead this routine builds the tables the
|
||||
first time it's called, and returns those tables the first time and
|
||||
thereafter. This reduces the size of the code by about 2K bytes, in
|
||||
exchange for a little execution time. However, BUILDFIXED should not be
|
||||
used for threaded applications, since the rewriting of the tables and virgin
|
||||
may not be thread-safe.
|
||||
*/
|
||||
local void fixedtables(state)
|
||||
struct inflate_state FAR *state;
|
||||
{
|
||||
#ifdef BUILDFIXED
|
||||
static int virgin = 1;
|
||||
static code *lenfix, *distfix;
|
||||
static code fixed[544];
|
||||
|
||||
/* build fixed huffman tables if first call (may not be thread safe) */
|
||||
if (virgin) {
|
||||
unsigned sym, bits;
|
||||
static code *next;
|
||||
|
||||
/* literal/length table */
|
||||
sym = 0;
|
||||
while (sym < 144) state->lens[sym++] = 8;
|
||||
while (sym < 256) state->lens[sym++] = 9;
|
||||
while (sym < 280) state->lens[sym++] = 7;
|
||||
while (sym < 288) state->lens[sym++] = 8;
|
||||
next = fixed;
|
||||
lenfix = next;
|
||||
bits = 9;
|
||||
inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
|
||||
|
||||
/* distance table */
|
||||
sym = 0;
|
||||
while (sym < 32) state->lens[sym++] = 5;
|
||||
distfix = next;
|
||||
bits = 5;
|
||||
inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
|
||||
|
||||
/* do this just once */
|
||||
virgin = 0;
|
||||
}
|
||||
#else /* !BUILDFIXED */
|
||||
# include "inffixed.h"
|
||||
#endif /* BUILDFIXED */
|
||||
state->lencode = lenfix;
|
||||
state->lenbits = 9;
|
||||
state->distcode = distfix;
|
||||
state->distbits = 5;
|
||||
}
|
||||
|
||||
/* Macros for inflateBack(): */
|
||||
|
||||
/* Load returned state from inflate_fast() */
|
||||
#define LOAD() \
|
||||
do { \
|
||||
put = strm->next_out; \
|
||||
left = strm->avail_out; \
|
||||
next = strm->next_in; \
|
||||
have = strm->avail_in; \
|
||||
hold = state->hold; \
|
||||
bits = state->bits; \
|
||||
} while (0)
|
||||
|
||||
/* Set state from registers for inflate_fast() */
|
||||
#define RESTORE() \
|
||||
do { \
|
||||
strm->next_out = put; \
|
||||
strm->avail_out = left; \
|
||||
strm->next_in = next; \
|
||||
strm->avail_in = have; \
|
||||
state->hold = hold; \
|
||||
state->bits = bits; \
|
||||
} while (0)
|
||||
|
||||
/* Clear the input bit accumulator */
|
||||
#define INITBITS() \
|
||||
do { \
|
||||
hold = 0; \
|
||||
bits = 0; \
|
||||
} while (0)
|
||||
|
||||
/* Assure that some input is available. If input is requested, but denied,
|
||||
then return a Z_BUF_ERROR from inflateBack(). */
|
||||
#define PULL() \
|
||||
do { \
|
||||
if (have == 0) { \
|
||||
have = in(in_desc, &next); \
|
||||
if (have == 0) { \
|
||||
next = Z_NULL; \
|
||||
ret = Z_BUF_ERROR; \
|
||||
goto inf_leave; \
|
||||
} \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
/* Get a byte of input into the bit accumulator, or return from inflateBack()
|
||||
with an error if there is no input available. */
|
||||
#define PULLBYTE() \
|
||||
do { \
|
||||
PULL(); \
|
||||
have--; \
|
||||
hold += (unsigned long)(*next++) << bits; \
|
||||
bits += 8; \
|
||||
} while (0)
|
||||
|
||||
/* Assure that there are at least n bits in the bit accumulator. If there is
|
||||
not enough available input to do that, then return from inflateBack() with
|
||||
an error. */
|
||||
#define NEEDBITS(n) \
|
||||
do { \
|
||||
while (bits < (unsigned)(n)) \
|
||||
PULLBYTE(); \
|
||||
} while (0)
|
||||
|
||||
/* Return the low n bits of the bit accumulator (n < 16) */
|
||||
#define BITS(n) \
|
||||
((unsigned)hold & ((1U << (n)) - 1))
|
||||
|
||||
/* Remove n bits from the bit accumulator */
|
||||
#define DROPBITS(n) \
|
||||
do { \
|
||||
hold >>= (n); \
|
||||
bits -= (unsigned)(n); \
|
||||
} while (0)
|
||||
|
||||
/* Remove zero to seven bits as needed to go to a byte boundary */
|
||||
#define BYTEBITS() \
|
||||
do { \
|
||||
hold >>= bits & 7; \
|
||||
bits -= bits & 7; \
|
||||
} while (0)
|
||||
|
||||
/* Assure that some output space is available, by writing out the window
|
||||
if it's full. If the write fails, return from inflateBack() with a
|
||||
Z_BUF_ERROR. */
|
||||
#define ROOM() \
|
||||
do { \
|
||||
if (left == 0) { \
|
||||
put = state->window; \
|
||||
left = state->wsize; \
|
||||
state->whave = left; \
|
||||
if (out(out_desc, put, left)) { \
|
||||
ret = Z_BUF_ERROR; \
|
||||
goto inf_leave; \
|
||||
} \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
strm provides the memory allocation functions and window buffer on input,
|
||||
and provides information on the unused input on return. For Z_DATA_ERROR
|
||||
returns, strm will also provide an error message.
|
||||
|
||||
in() and out() are the call-back input and output functions. When
|
||||
inflateBack() needs more input, it calls in(). When inflateBack() has
|
||||
filled the window with output, or when it completes with data in the
|
||||
window, it calls out() to write out the data. The application must not
|
||||
change the provided input until in() is called again or inflateBack()
|
||||
returns. The application must not change the window/output buffer until
|
||||
inflateBack() returns.
|
||||
|
||||
in() and out() are called with a descriptor parameter provided in the
|
||||
inflateBack() call. This parameter can be a structure that provides the
|
||||
information required to do the read or write, as well as accumulated
|
||||
information on the input and output such as totals and check values.
|
||||
|
||||
in() should return zero on failure. out() should return non-zero on
|
||||
failure. If either in() or out() fails, than inflateBack() returns a
|
||||
Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it
|
||||
was in() or out() that caused in the error. Otherwise, inflateBack()
|
||||
returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
|
||||
error, or Z_MEM_ERROR if it could not allocate memory for the state.
|
||||
inflateBack() can also return Z_STREAM_ERROR if the input parameters
|
||||
are not correct, i.e. strm is Z_NULL or the state was not initialized.
|
||||
*/
|
||||
int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
|
||||
z_stream FAR *strm;
|
||||
in_func in;
|
||||
void FAR *in_desc;
|
||||
out_func out;
|
||||
void FAR *out_desc;
|
||||
{
|
||||
struct inflate_state FAR *state;
|
||||
unsigned char FAR *next; /* next input */
|
||||
unsigned char FAR *put; /* next output */
|
||||
unsigned have, left; /* available input and output */
|
||||
unsigned long hold; /* bit buffer */
|
||||
unsigned bits; /* bits in bit buffer */
|
||||
unsigned copy; /* number of stored or match bytes to copy */
|
||||
unsigned char FAR *from; /* where to copy match bytes from */
|
||||
code this; /* current decoding table entry */
|
||||
code last; /* parent table entry */
|
||||
unsigned len; /* length to copy for repeats, bits to drop */
|
||||
int ret; /* return code */
|
||||
static const unsigned short order[19] = /* permutation of code lengths */
|
||||
{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
|
||||
|
||||
/* Check that the strm exists and that the state was initialized */
|
||||
if (strm == Z_NULL || strm->state == Z_NULL)
|
||||
return Z_STREAM_ERROR;
|
||||
state = (struct inflate_state FAR *)strm->state;
|
||||
|
||||
/* Reset the state */
|
||||
strm->msg = Z_NULL;
|
||||
state->mode = TYPE;
|
||||
state->last = 0;
|
||||
state->whave = 0;
|
||||
next = strm->next_in;
|
||||
have = next != Z_NULL ? strm->avail_in : 0;
|
||||
hold = 0;
|
||||
bits = 0;
|
||||
put = state->window;
|
||||
left = state->wsize;
|
||||
|
||||
/* Inflate until end of block marked as last */
|
||||
for (;;)
|
||||
switch (state->mode) {
|
||||
case TYPE:
|
||||
/* determine and dispatch block type */
|
||||
if (state->last) {
|
||||
BYTEBITS();
|
||||
state->mode = DONE;
|
||||
break;
|
||||
}
|
||||
NEEDBITS(3);
|
||||
state->last = BITS(1);
|
||||
DROPBITS(1);
|
||||
switch (BITS(2)) {
|
||||
case 0: /* stored block */
|
||||
Tracev((stderr, "inflate: stored block%s\n",
|
||||
state->last ? " (last)" : ""));
|
||||
state->mode = STORED;
|
||||
break;
|
||||
case 1: /* fixed block */
|
||||
fixedtables(state);
|
||||
Tracev((stderr, "inflate: fixed codes block%s\n",
|
||||
state->last ? " (last)" : ""));
|
||||
state->mode = LEN; /* decode codes */
|
||||
break;
|
||||
case 2: /* dynamic block */
|
||||
Tracev((stderr, "inflate: dynamic codes block%s\n",
|
||||
state->last ? " (last)" : ""));
|
||||
state->mode = TABLE;
|
||||
break;
|
||||
case 3:
|
||||
strm->msg = (char *)"invalid block type";
|
||||
state->mode = BAD;
|
||||
}
|
||||
DROPBITS(2);
|
||||
break;
|
||||
|
||||
case STORED:
|
||||
/* get and verify stored block length */
|
||||
BYTEBITS(); /* go to byte boundary */
|
||||
NEEDBITS(32);
|
||||
if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
|
||||
strm->msg = (char *)"invalid stored block lengths";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
state->length = (unsigned)hold & 0xffff;
|
||||
Tracev((stderr, "inflate: stored length %u\n",
|
||||
state->length));
|
||||
INITBITS();
|
||||
|
||||
/* copy stored block from input to output */
|
||||
while (state->length != 0) {
|
||||
copy = state->length;
|
||||
PULL();
|
||||
ROOM();
|
||||
if (copy > have) copy = have;
|
||||
if (copy > left) copy = left;
|
||||
zmemcpy(put, next, copy);
|
||||
have -= copy;
|
||||
next += copy;
|
||||
left -= copy;
|
||||
put += copy;
|
||||
state->length -= copy;
|
||||
}
|
||||
Tracev((stderr, "inflate: stored end\n"));
|
||||
state->mode = TYPE;
|
||||
break;
|
||||
|
||||
case TABLE:
|
||||
/* get dynamic table entries descriptor */
|
||||
NEEDBITS(14);
|
||||
state->nlen = BITS(5) + 257;
|
||||
DROPBITS(5);
|
||||
state->ndist = BITS(5) + 1;
|
||||
DROPBITS(5);
|
||||
state->ncode = BITS(4) + 4;
|
||||
DROPBITS(4);
|
||||
#ifndef PKZIP_BUG_WORKAROUND
|
||||
if (state->nlen > 286 || state->ndist > 30) {
|
||||
strm->msg = (char *)"too many length or distance symbols";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
Tracev((stderr, "inflate: table sizes ok\n"));
|
||||
|
||||
/* get code length code lengths (not a typo) */
|
||||
state->have = 0;
|
||||
while (state->have < state->ncode) {
|
||||
NEEDBITS(3);
|
||||
state->lens[order[state->have++]] = (unsigned short)BITS(3);
|
||||
DROPBITS(3);
|
||||
}
|
||||
while (state->have < 19)
|
||||
state->lens[order[state->have++]] = 0;
|
||||
state->next = state->codes;
|
||||
state->lencode = (code const FAR *)(state->next);
|
||||
state->lenbits = 7;
|
||||
ret = inflate_table(CODES, state->lens, 19, &(state->next),
|
||||
&(state->lenbits), state->work);
|
||||
if (ret) {
|
||||
strm->msg = (char *)"invalid code lengths set";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
Tracev((stderr, "inflate: code lengths ok\n"));
|
||||
|
||||
/* get length and distance code code lengths */
|
||||
state->have = 0;
|
||||
while (state->have < state->nlen + state->ndist) {
|
||||
for (;;) {
|
||||
this = state->lencode[BITS(state->lenbits)];
|
||||
if ((unsigned)(this.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
if (this.val < 16) {
|
||||
NEEDBITS(this.bits);
|
||||
DROPBITS(this.bits);
|
||||
state->lens[state->have++] = this.val;
|
||||
}
|
||||
else {
|
||||
if (this.val == 16) {
|
||||
NEEDBITS(this.bits + 2);
|
||||
DROPBITS(this.bits);
|
||||
if (state->have == 0) {
|
||||
strm->msg = (char *)"invalid bit length repeat";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
len = (unsigned)(state->lens[state->have - 1]);
|
||||
copy = 3 + BITS(2);
|
||||
DROPBITS(2);
|
||||
}
|
||||
else if (this.val == 17) {
|
||||
NEEDBITS(this.bits + 3);
|
||||
DROPBITS(this.bits);
|
||||
len = 0;
|
||||
copy = 3 + BITS(3);
|
||||
DROPBITS(3);
|
||||
}
|
||||
else {
|
||||
NEEDBITS(this.bits + 7);
|
||||
DROPBITS(this.bits);
|
||||
len = 0;
|
||||
copy = 11 + BITS(7);
|
||||
DROPBITS(7);
|
||||
}
|
||||
if (state->have + copy > state->nlen + state->ndist) {
|
||||
strm->msg = (char *)"invalid bit length repeat";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
while (copy--)
|
||||
state->lens[state->have++] = (unsigned short)len;
|
||||
}
|
||||
}
|
||||
|
||||
/* build code tables */
|
||||
state->next = state->codes;
|
||||
state->lencode = (code const FAR *)(state->next);
|
||||
state->lenbits = 9;
|
||||
ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
|
||||
&(state->lenbits), state->work);
|
||||
if (ret) {
|
||||
strm->msg = (char *)"invalid literal/lengths set";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
state->distcode = (code const FAR *)(state->next);
|
||||
state->distbits = 6;
|
||||
ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
|
||||
&(state->next), &(state->distbits), state->work);
|
||||
if (ret) {
|
||||
strm->msg = (char *)"invalid distances set";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
Tracev((stderr, "inflate: codes ok\n"));
|
||||
state->mode = LEN;
|
||||
|
||||
case LEN:
|
||||
/* use inflate_fast() if we have enough input and output */
|
||||
if (have >= 6 && left >= 258) {
|
||||
RESTORE();
|
||||
if (state->whave < state->wsize)
|
||||
state->whave = state->wsize - left;
|
||||
inflate_fast(strm, state->wsize);
|
||||
LOAD();
|
||||
break;
|
||||
}
|
||||
|
||||
/* get a literal, length, or end-of-block code */
|
||||
for (;;) {
|
||||
this = state->lencode[BITS(state->lenbits)];
|
||||
if ((unsigned)(this.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
if (this.op && (this.op & 0xf0) == 0) {
|
||||
last = this;
|
||||
for (;;) {
|
||||
this = state->lencode[last.val +
|
||||
(BITS(last.bits + last.op) >> last.bits)];
|
||||
if ((unsigned)(last.bits + this.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
DROPBITS(last.bits);
|
||||
}
|
||||
DROPBITS(this.bits);
|
||||
state->length = (unsigned)this.val;
|
||||
|
||||
/* process literal */
|
||||
if (this.op == 0) {
|
||||
Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
|
||||
"inflate: literal '%c'\n" :
|
||||
"inflate: literal 0x%02x\n", this.val));
|
||||
ROOM();
|
||||
*put++ = (unsigned char)(state->length);
|
||||
left--;
|
||||
state->mode = LEN;
|
||||
break;
|
||||
}
|
||||
|
||||
/* process end of block */
|
||||
if (this.op & 32) {
|
||||
Tracevv((stderr, "inflate: end of block\n"));
|
||||
state->mode = TYPE;
|
||||
break;
|
||||
}
|
||||
|
||||
/* invalid code */
|
||||
if (this.op & 64) {
|
||||
strm->msg = (char *)"invalid literal/length code";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
|
||||
/* length code -- get extra bits, if any */
|
||||
state->extra = (unsigned)(this.op) & 15;
|
||||
if (state->extra != 0) {
|
||||
NEEDBITS(state->extra);
|
||||
state->length += BITS(state->extra);
|
||||
DROPBITS(state->extra);
|
||||
}
|
||||
Tracevv((stderr, "inflate: length %u\n", state->length));
|
||||
|
||||
/* get distance code */
|
||||
for (;;) {
|
||||
this = state->distcode[BITS(state->distbits)];
|
||||
if ((unsigned)(this.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
if ((this.op & 0xf0) == 0) {
|
||||
last = this;
|
||||
for (;;) {
|
||||
this = state->distcode[last.val +
|
||||
(BITS(last.bits + last.op) >> last.bits)];
|
||||
if ((unsigned)(last.bits + this.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
DROPBITS(last.bits);
|
||||
}
|
||||
DROPBITS(this.bits);
|
||||
if (this.op & 64) {
|
||||
strm->msg = (char *)"invalid distance code";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
state->offset = (unsigned)this.val;
|
||||
|
||||
/* get distance extra bits, if any */
|
||||
state->extra = (unsigned)(this.op) & 15;
|
||||
if (state->extra != 0) {
|
||||
NEEDBITS(state->extra);
|
||||
state->offset += BITS(state->extra);
|
||||
DROPBITS(state->extra);
|
||||
}
|
||||
if (state->offset > state->wsize - (state->whave < state->wsize ?
|
||||
left : 0)) {
|
||||
strm->msg = (char *)"invalid distance too far back";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
Tracevv((stderr, "inflate: distance %u\n", state->offset));
|
||||
|
||||
/* copy match from window to output */
|
||||
do {
|
||||
ROOM();
|
||||
copy = state->wsize - state->offset;
|
||||
if (copy < left) {
|
||||
from = put + copy;
|
||||
copy = left - copy;
|
||||
}
|
||||
else {
|
||||
from = put - state->offset;
|
||||
copy = left;
|
||||
}
|
||||
if (copy > state->length) copy = state->length;
|
||||
state->length -= copy;
|
||||
left -= copy;
|
||||
do {
|
||||
*put++ = *from++;
|
||||
} while (--copy);
|
||||
} while (state->length != 0);
|
||||
break;
|
||||
|
||||
case DONE:
|
||||
/* inflate stream terminated properly -- write leftover output */
|
||||
ret = Z_STREAM_END;
|
||||
if (left < state->wsize) {
|
||||
if (out(out_desc, state->window, state->wsize - left))
|
||||
ret = Z_BUF_ERROR;
|
||||
}
|
||||
goto inf_leave;
|
||||
|
||||
case BAD:
|
||||
ret = Z_DATA_ERROR;
|
||||
goto inf_leave;
|
||||
|
||||
default: /* can't happen, but makes compilers happy */
|
||||
ret = Z_STREAM_ERROR;
|
||||
goto inf_leave;
|
||||
}
|
||||
|
||||
/* Return unused input */
|
||||
inf_leave:
|
||||
strm->next_in = next;
|
||||
strm->avail_in = have;
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ZEXPORT inflateBackEnd(strm)
|
||||
z_stream FAR *strm;
|
||||
{
|
||||
if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
|
||||
return Z_STREAM_ERROR;
|
||||
ZFREE(strm, strm->state);
|
||||
strm->state = Z_NULL;
|
||||
Tracev((stderr, "inflate: end\n"));
|
||||
return Z_OK;
|
||||
}
|
||||
|
|
@ -1,183 +1,305 @@
|
|||
/* inffast.c -- process literals and length/distance pairs fast
|
||||
* Copyright (C) 1995-2002 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
/* inffast.c -- fast decoding
|
||||
* Copyright (C) 1995-2003 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
#include "zutil.h"
|
||||
#include "inftrees.h"
|
||||
#include "infblock.h"
|
||||
#include "infcodes.h"
|
||||
#include "infutil.h"
|
||||
#include "inflate.h"
|
||||
#include "inffast.h"
|
||||
|
||||
struct inflate_codes_state {int dummy;}; /* for buggy compilers */
|
||||
#ifndef ASMINF
|
||||
|
||||
/* simplify the use of the inflate_huft type with some defines */
|
||||
#define exop word.what.Exop
|
||||
#define bits word.what.Bits
|
||||
/* Allow machine dependent optimization for post-increment or pre-increment.
|
||||
Based on testing to date,
|
||||
Pre-increment preferred for:
|
||||
- PowerPC G3 (Adler)
|
||||
- MIPS R5000 (Randers-Pehrson)
|
||||
Post-increment preferred for:
|
||||
- none
|
||||
No measurable difference:
|
||||
- Pentium III (Anderson)
|
||||
- 68060 (Nikl)
|
||||
*/
|
||||
#ifdef POSTINC
|
||||
# define OFF 0
|
||||
# define PUP(a) *(a)++
|
||||
#else
|
||||
# define OFF 1
|
||||
# define PUP(a) *++(a)
|
||||
#endif
|
||||
|
||||
/* macros for bit input with no checking and for returning unused bytes */
|
||||
#define GRABBITS(j) {while(k<(j)){b|=((uLong)NEXTBYTE)<<k;k+=8;}}
|
||||
#define UNGRAB {c=z->avail_in-n;c=(k>>3)<c?k>>3:c;n+=c;p-=c;k-=c<<3;}
|
||||
/*
|
||||
Decode literal, length, and distance codes and write out the resulting
|
||||
literal and match bytes until either not enough input or output is
|
||||
available, an end-of-block is encountered, or a data error is encountered.
|
||||
When large enough input and output buffers are supplied to inflate(), for
|
||||
example, a 16K input buffer and a 64K output buffer, more than 95% of the
|
||||
inflate execution time is spent in this routine.
|
||||
|
||||
/* Called with number of bytes left to write in window at least 258
|
||||
(the maximum string length) and number of input bytes available
|
||||
at least ten. The ten bytes are six bytes for the longest length/
|
||||
distance pair plus four bytes for overloading the bit buffer. */
|
||||
Entry assumptions:
|
||||
|
||||
int inflate_fast(bl, bd, tl, td, s, z)
|
||||
uInt bl, bd;
|
||||
inflate_huft *tl;
|
||||
inflate_huft *td; /* need separate declaration for Borland C++ */
|
||||
inflate_blocks_statef *s;
|
||||
z_streamp z;
|
||||
state->mode == LEN
|
||||
strm->avail_in >= 6
|
||||
strm->avail_out >= 258
|
||||
start >= strm->avail_out
|
||||
state->bits < 8
|
||||
|
||||
On return, state->mode is one of:
|
||||
|
||||
LEN -- ran out of enough output space or enough available input
|
||||
TYPE -- reached end of block code, inflate() to interpret next block
|
||||
BAD -- error in block data
|
||||
|
||||
Notes:
|
||||
|
||||
- The maximum input bits used by a length/distance pair is 15 bits for the
|
||||
length code, 5 bits for the length extra, 15 bits for the distance code,
|
||||
and 13 bits for the distance extra. This totals 48 bits, or six bytes.
|
||||
Therefore if strm->avail_in >= 6, then there is enough input to avoid
|
||||
checking for available input while decoding.
|
||||
|
||||
- The maximum bytes that a single length/distance pair can output is 258
|
||||
bytes, which is the maximum length that can be coded. inflate_fast()
|
||||
requires strm->avail_out >= 258 for each loop to avoid checking for
|
||||
output space.
|
||||
*/
|
||||
void inflate_fast(strm, start)
|
||||
z_streamp strm;
|
||||
unsigned start; /* inflate()'s starting value for strm->avail_out */
|
||||
{
|
||||
inflate_huft *t; /* temporary pointer */
|
||||
uInt e; /* extra bits or operation */
|
||||
uLong b; /* bit buffer */
|
||||
uInt k; /* bits in bit buffer */
|
||||
Bytef *p; /* input data pointer */
|
||||
uInt n; /* bytes available there */
|
||||
Bytef *q; /* output window write pointer */
|
||||
uInt m; /* bytes to end of window or read pointer */
|
||||
uInt ml; /* mask for literal/length tree */
|
||||
uInt md; /* mask for distance tree */
|
||||
uInt c; /* bytes to copy */
|
||||
uInt d; /* distance back to copy from */
|
||||
Bytef *r; /* copy source pointer */
|
||||
struct inflate_state FAR *state;
|
||||
unsigned char FAR *in; /* local strm->next_in */
|
||||
unsigned char FAR *last; /* while in < last, enough input available */
|
||||
unsigned char FAR *out; /* local strm->next_out */
|
||||
unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
|
||||
unsigned char FAR *end; /* while out < end, enough space available */
|
||||
unsigned wsize; /* window size or zero if not using window */
|
||||
unsigned whave; /* valid bytes in the window */
|
||||
unsigned write; /* window write index */
|
||||
unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */
|
||||
unsigned long hold; /* local strm->hold */
|
||||
unsigned bits; /* local strm->bits */
|
||||
code const FAR *lcode; /* local strm->lencode */
|
||||
code const FAR *dcode; /* local strm->distcode */
|
||||
unsigned lmask; /* mask for first level of length codes */
|
||||
unsigned dmask; /* mask for first level of distance codes */
|
||||
code this; /* retrieved table entry */
|
||||
unsigned op; /* code bits, operation, extra bits, or */
|
||||
/* window position, window bytes to copy */
|
||||
unsigned len; /* match length, unused bytes */
|
||||
unsigned dist; /* match distance */
|
||||
unsigned char FAR *from; /* where to copy match from */
|
||||
|
||||
/* load input, output, bit values */
|
||||
LOAD
|
||||
/* copy state to local variables */
|
||||
state = (struct inflate_state FAR *)strm->state;
|
||||
in = strm->next_in - OFF;
|
||||
last = in + (strm->avail_in - 5);
|
||||
out = strm->next_out - OFF;
|
||||
beg = out - (start - strm->avail_out);
|
||||
end = out + (strm->avail_out - 257);
|
||||
wsize = state->wsize;
|
||||
whave = state->whave;
|
||||
write = state->write;
|
||||
window = state->window;
|
||||
hold = state->hold;
|
||||
bits = state->bits;
|
||||
lcode = state->lencode;
|
||||
dcode = state->distcode;
|
||||
lmask = (1U << state->lenbits) - 1;
|
||||
dmask = (1U << state->distbits) - 1;
|
||||
|
||||
/* initialize masks */
|
||||
ml = inflate_mask[bl];
|
||||
md = inflate_mask[bd];
|
||||
|
||||
/* do until not enough input or output space for fast loop */
|
||||
do { /* assume called with m >= 258 && n >= 10 */
|
||||
/* get literal/length code */
|
||||
GRABBITS(20) /* max bits for literal/length code */
|
||||
if ((e = (t = tl + ((uInt)b & ml))->exop) == 0)
|
||||
{
|
||||
DUMPBITS(t->bits)
|
||||
Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
|
||||
"inflate: * literal '%c'\n" :
|
||||
"inflate: * literal 0x%02x\n", t->base));
|
||||
*q++ = (Byte)t->base;
|
||||
m--;
|
||||
continue;
|
||||
}
|
||||
/* decode literals and length/distances until end-of-block or not enough
|
||||
input data or output space */
|
||||
do {
|
||||
DUMPBITS(t->bits)
|
||||
if (e & 16)
|
||||
{
|
||||
/* get extra bits for length */
|
||||
e &= 15;
|
||||
c = t->base + ((uInt)b & inflate_mask[e]);
|
||||
DUMPBITS(e)
|
||||
Tracevv((stderr, "inflate: * length %u\n", c));
|
||||
|
||||
/* decode distance base of block to copy */
|
||||
GRABBITS(15); /* max bits for distance code */
|
||||
e = (t = td + ((uInt)b & md))->exop;
|
||||
do {
|
||||
DUMPBITS(t->bits)
|
||||
if (e & 16)
|
||||
{
|
||||
/* get extra bits to add to distance base */
|
||||
e &= 15;
|
||||
GRABBITS(e) /* get extra bits (up to 13) */
|
||||
d = t->base + ((uInt)b & inflate_mask[e]);
|
||||
DUMPBITS(e)
|
||||
Tracevv((stderr, "inflate: * distance %u\n", d));
|
||||
|
||||
/* do the copy */
|
||||
m -= c;
|
||||
r = q - d;
|
||||
if (r < s->window) /* wrap if needed */
|
||||
{
|
||||
do {
|
||||
r += s->end - s->window; /* force pointer in window */
|
||||
} while (r < s->window); /* covers invalid distances */
|
||||
e = s->end - r;
|
||||
if (c > e)
|
||||
{
|
||||
c -= e; /* wrapped copy */
|
||||
do {
|
||||
*q++ = *r++;
|
||||
} while (--e);
|
||||
r = s->window;
|
||||
do {
|
||||
*q++ = *r++;
|
||||
} while (--c);
|
||||
}
|
||||
else /* normal copy */
|
||||
{
|
||||
*q++ = *r++; c--;
|
||||
*q++ = *r++; c--;
|
||||
do {
|
||||
*q++ = *r++;
|
||||
} while (--c);
|
||||
}
|
||||
}
|
||||
else /* normal copy */
|
||||
{
|
||||
*q++ = *r++; c--;
|
||||
*q++ = *r++; c--;
|
||||
do {
|
||||
*q++ = *r++;
|
||||
} while (--c);
|
||||
}
|
||||
break;
|
||||
}
|
||||
else if ((e & 64) == 0)
|
||||
{
|
||||
t += t->base;
|
||||
e = (t += ((uInt)b & inflate_mask[e]))->exop;
|
||||
}
|
||||
else
|
||||
{
|
||||
z->msg = (char*)"invalid distance code";
|
||||
UNGRAB
|
||||
UPDATE
|
||||
return Z_DATA_ERROR;
|
||||
}
|
||||
} while (1);
|
||||
break;
|
||||
}
|
||||
if ((e & 64) == 0)
|
||||
{
|
||||
t += t->base;
|
||||
if ((e = (t += ((uInt)b & inflate_mask[e]))->exop) == 0)
|
||||
{
|
||||
DUMPBITS(t->bits)
|
||||
Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
|
||||
"inflate: * literal '%c'\n" :
|
||||
"inflate: * literal 0x%02x\n", t->base));
|
||||
*q++ = (Byte)t->base;
|
||||
m--;
|
||||
break;
|
||||
if (bits < 15) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
}
|
||||
}
|
||||
else if (e & 32)
|
||||
{
|
||||
Tracevv((stderr, "inflate: * end of block\n"));
|
||||
UNGRAB
|
||||
UPDATE
|
||||
return Z_STREAM_END;
|
||||
}
|
||||
else
|
||||
{
|
||||
z->msg = (char*)"invalid literal/length code";
|
||||
UNGRAB
|
||||
UPDATE
|
||||
return Z_DATA_ERROR;
|
||||
}
|
||||
} while (1);
|
||||
} while (m >= 258 && n >= 10);
|
||||
this = lcode[hold & lmask];
|
||||
dolen:
|
||||
op = (unsigned)(this.bits);
|
||||
hold >>= op;
|
||||
bits -= op;
|
||||
op = (unsigned)(this.op);
|
||||
if (op == 0) { /* literal */
|
||||
Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
|
||||
"inflate: literal '%c'\n" :
|
||||
"inflate: literal 0x%02x\n", this.val));
|
||||
PUP(out) = (unsigned char)(this.val);
|
||||
}
|
||||
else if (op & 16) { /* length base */
|
||||
len = (unsigned)(this.val);
|
||||
op &= 15; /* number of extra bits */
|
||||
if (op) {
|
||||
if (bits < op) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
}
|
||||
len += (unsigned)hold & ((1U << op) - 1);
|
||||
hold >>= op;
|
||||
bits -= op;
|
||||
}
|
||||
Tracevv((stderr, "inflate: length %u\n", len));
|
||||
if (bits < 15) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
}
|
||||
this = dcode[hold & dmask];
|
||||
dodist:
|
||||
op = (unsigned)(this.bits);
|
||||
hold >>= op;
|
||||
bits -= op;
|
||||
op = (unsigned)(this.op);
|
||||
if (op & 16) { /* distance base */
|
||||
dist = (unsigned)(this.val);
|
||||
op &= 15; /* number of extra bits */
|
||||
if (bits < op) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
if (bits < op) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
}
|
||||
}
|
||||
dist += (unsigned)hold & ((1U << op) - 1);
|
||||
hold >>= op;
|
||||
bits -= op;
|
||||
Tracevv((stderr, "inflate: distance %u\n", dist));
|
||||
op = (unsigned)(out - beg); /* max distance in output */
|
||||
if (dist > op) { /* see if copy from window */
|
||||
op = dist - op; /* distance back in window */
|
||||
if (op > whave) {
|
||||
strm->msg = (char *)"invalid distance too far back";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
from = window - OFF;
|
||||
if (write == 0) { /* very common case */
|
||||
from += wsize - op;
|
||||
if (op < len) { /* some from window */
|
||||
len -= op;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--op);
|
||||
from = out - dist; /* rest from output */
|
||||
}
|
||||
}
|
||||
else if (write < op) { /* wrap around window */
|
||||
from += wsize + write - op;
|
||||
op -= write;
|
||||
if (op < len) { /* some from end of window */
|
||||
len -= op;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--op);
|
||||
from = window - OFF;
|
||||
if (write < len) { /* some from start of window */
|
||||
op = write;
|
||||
len -= op;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--op);
|
||||
from = out - dist; /* rest from output */
|
||||
}
|
||||
}
|
||||
}
|
||||
else { /* contiguous in window */
|
||||
from += write - op;
|
||||
if (op < len) { /* some from window */
|
||||
len -= op;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--op);
|
||||
from = out - dist; /* rest from output */
|
||||
}
|
||||
}
|
||||
while (len > 2) {
|
||||
PUP(out) = PUP(from);
|
||||
PUP(out) = PUP(from);
|
||||
PUP(out) = PUP(from);
|
||||
len -= 3;
|
||||
}
|
||||
if (len) {
|
||||
PUP(out) = PUP(from);
|
||||
if (len > 1)
|
||||
PUP(out) = PUP(from);
|
||||
}
|
||||
}
|
||||
else {
|
||||
from = out - dist; /* copy direct from output */
|
||||
do { /* minimum length is three */
|
||||
PUP(out) = PUP(from);
|
||||
PUP(out) = PUP(from);
|
||||
PUP(out) = PUP(from);
|
||||
len -= 3;
|
||||
} while (len > 2);
|
||||
if (len) {
|
||||
PUP(out) = PUP(from);
|
||||
if (len > 1)
|
||||
PUP(out) = PUP(from);
|
||||
}
|
||||
}
|
||||
}
|
||||
else if ((op & 64) == 0) { /* 2nd level distance code */
|
||||
this = dcode[this.val + (hold & ((1U << op) - 1))];
|
||||
goto dodist;
|
||||
}
|
||||
else {
|
||||
strm->msg = (char *)"invalid distance code";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
}
|
||||
else if ((op & 64) == 0) { /* 2nd level length code */
|
||||
this = lcode[this.val + (hold & ((1U << op) - 1))];
|
||||
goto dolen;
|
||||
}
|
||||
else if (op & 32) { /* end-of-block */
|
||||
Tracevv((stderr, "inflate: end of block\n"));
|
||||
state->mode = TYPE;
|
||||
break;
|
||||
}
|
||||
else {
|
||||
strm->msg = (char *)"invalid literal/length code";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
} while (in < last && out < end);
|
||||
|
||||
/* not enough input or output--restore pointers and return */
|
||||
UNGRAB
|
||||
UPDATE
|
||||
return Z_OK;
|
||||
/* return unused bytes (on entry, bits < 8, so in won't go too far back) */
|
||||
len = bits >> 3;
|
||||
in -= len;
|
||||
bits -= len << 3;
|
||||
hold &= (1U << bits) - 1;
|
||||
|
||||
/* update state and return */
|
||||
strm->next_in = in + OFF;
|
||||
strm->next_out = out + OFF;
|
||||
strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
|
||||
strm->avail_out = (unsigned)(out < end ?
|
||||
257 + (end - out) : 257 - (out - end));
|
||||
state->hold = hold;
|
||||
state->bits = bits;
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe):
|
||||
- Using bit fields for code structure
|
||||
- Different op definition to avoid & for extra bits (do & for table bits)
|
||||
- Three separate decoding do-loops for direct, window, and write == 0
|
||||
- Special case for distance > 1 copies to do overlapped load and store copy
|
||||
- Explicit branch predictions (based on measured branch probabilities)
|
||||
- Deferring match copy and interspersed it with decoding subsequent codes
|
||||
- Swapping literal/length else
|
||||
- Swapping window/direct else
|
||||
- Larger unrolled copy loops (three is about right)
|
||||
- Moving len -= 3 statement into middle of loop
|
||||
*/
|
||||
|
||||
#endif /* !ASMINF */
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/* inffast.h -- header to use inffast.c
|
||||
* Copyright (C) 1995-2002 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* WARNING: this file should *not* be used by applications. It is
|
||||
|
|
@ -8,10 +8,4 @@
|
|||
subject to change. Applications should only use zlib.h.
|
||||
*/
|
||||
|
||||
extern int inflate_fast OF((
|
||||
uInt,
|
||||
uInt,
|
||||
inflate_huft *,
|
||||
inflate_huft *,
|
||||
inflate_blocks_statef *,
|
||||
z_streamp ));
|
||||
void inflate_fast OF((z_streamp strm, unsigned start));
|
||||
|
|
|
|||
|
|
@ -1,151 +1,94 @@
|
|||
/* inffixed.h -- table for decoding fixed codes
|
||||
* Generated automatically by the maketree.c program
|
||||
*/
|
||||
/* inffixed.h -- table for decoding fixed codes
|
||||
* Generated automatically by makefixed().
|
||||
*/
|
||||
|
||||
/* WARNING: this file should *not* be used by applications. It is
|
||||
part of the implementation of the compression library and is
|
||||
subject to change. Applications should only use zlib.h.
|
||||
*/
|
||||
/* WARNING: this file should *not* be used by applications. It
|
||||
is part of the implementation of the compression library and
|
||||
is subject to change. Applications should only use zlib.h.
|
||||
*/
|
||||
|
||||
local uInt fixed_bl = 9;
|
||||
local uInt fixed_bd = 5;
|
||||
local inflate_huft fixed_tl[] = {
|
||||
{{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
|
||||
{{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},192},
|
||||
{{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},160},
|
||||
{{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},224},
|
||||
{{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},144},
|
||||
{{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},208},
|
||||
{{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},176},
|
||||
{{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},240},
|
||||
{{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
|
||||
{{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},200},
|
||||
{{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},168},
|
||||
{{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},232},
|
||||
{{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},152},
|
||||
{{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},216},
|
||||
{{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},184},
|
||||
{{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},248},
|
||||
{{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
|
||||
{{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},196},
|
||||
{{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},164},
|
||||
{{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},228},
|
||||
{{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},148},
|
||||
{{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},212},
|
||||
{{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},180},
|
||||
{{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},244},
|
||||
{{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
|
||||
{{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},204},
|
||||
{{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},172},
|
||||
{{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},236},
|
||||
{{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},156},
|
||||
{{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},220},
|
||||
{{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},188},
|
||||
{{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},252},
|
||||
{{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
|
||||
{{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},194},
|
||||
{{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},162},
|
||||
{{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},226},
|
||||
{{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},146},
|
||||
{{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},210},
|
||||
{{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},178},
|
||||
{{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},242},
|
||||
{{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
|
||||
{{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},202},
|
||||
{{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},170},
|
||||
{{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},234},
|
||||
{{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},154},
|
||||
{{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},218},
|
||||
{{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},186},
|
||||
{{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},250},
|
||||
{{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
|
||||
{{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},198},
|
||||
{{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},166},
|
||||
{{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},230},
|
||||
{{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},150},
|
||||
{{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},214},
|
||||
{{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},182},
|
||||
{{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},246},
|
||||
{{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
|
||||
{{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},206},
|
||||
{{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},174},
|
||||
{{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},238},
|
||||
{{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},158},
|
||||
{{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},222},
|
||||
{{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},190},
|
||||
{{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},254},
|
||||
{{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
|
||||
{{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},193},
|
||||
{{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},161},
|
||||
{{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},225},
|
||||
{{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},145},
|
||||
{{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},209},
|
||||
{{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},177},
|
||||
{{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},241},
|
||||
{{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
|
||||
{{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},201},
|
||||
{{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},169},
|
||||
{{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},233},
|
||||
{{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},153},
|
||||
{{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},217},
|
||||
{{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},185},
|
||||
{{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},249},
|
||||
{{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
|
||||
{{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},197},
|
||||
{{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},165},
|
||||
{{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},229},
|
||||
{{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},149},
|
||||
{{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},213},
|
||||
{{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},181},
|
||||
{{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},245},
|
||||
{{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
|
||||
{{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},205},
|
||||
{{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},173},
|
||||
{{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},237},
|
||||
{{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},157},
|
||||
{{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},221},
|
||||
{{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},189},
|
||||
{{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},253},
|
||||
{{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
|
||||
{{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},195},
|
||||
{{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},163},
|
||||
{{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},227},
|
||||
{{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},147},
|
||||
{{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},211},
|
||||
{{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},179},
|
||||
{{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},243},
|
||||
{{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
|
||||
{{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},203},
|
||||
{{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},171},
|
||||
{{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},235},
|
||||
{{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},155},
|
||||
{{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},219},
|
||||
{{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},187},
|
||||
{{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},251},
|
||||
{{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
|
||||
{{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},199},
|
||||
{{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},167},
|
||||
{{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},231},
|
||||
{{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},151},
|
||||
{{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},215},
|
||||
{{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},183},
|
||||
{{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},247},
|
||||
{{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
|
||||
{{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},207},
|
||||
{{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},175},
|
||||
{{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},239},
|
||||
{{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},159},
|
||||
{{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},223},
|
||||
{{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},191},
|
||||
{{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},255}
|
||||
};
|
||||
local inflate_huft fixed_td[] = {
|
||||
{{{80,5}},1}, {{{87,5}},257}, {{{83,5}},17}, {{{91,5}},4097},
|
||||
{{{81,5}},5}, {{{89,5}},1025}, {{{85,5}},65}, {{{93,5}},16385},
|
||||
{{{80,5}},3}, {{{88,5}},513}, {{{84,5}},33}, {{{92,5}},8193},
|
||||
{{{82,5}},9}, {{{90,5}},2049}, {{{86,5}},129}, {{{192,5}},24577},
|
||||
{{{80,5}},2}, {{{87,5}},385}, {{{83,5}},25}, {{{91,5}},6145},
|
||||
{{{81,5}},7}, {{{89,5}},1537}, {{{85,5}},97}, {{{93,5}},24577},
|
||||
{{{80,5}},4}, {{{88,5}},769}, {{{84,5}},49}, {{{92,5}},12289},
|
||||
{{{82,5}},13}, {{{90,5}},3073}, {{{86,5}},193}, {{{192,5}},24577}
|
||||
};
|
||||
static const code lenfix[512] = {
|
||||
{96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},
|
||||
{0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},
|
||||
{0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},
|
||||
{0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},
|
||||
{0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},
|
||||
{21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},
|
||||
{0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},
|
||||
{0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},
|
||||
{18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},
|
||||
{0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},
|
||||
{0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},
|
||||
{0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},
|
||||
{20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},
|
||||
{0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},
|
||||
{0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},
|
||||
{0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},
|
||||
{16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},
|
||||
{0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
|
||||
{0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},
|
||||
{0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},
|
||||
{0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},
|
||||
{0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},
|
||||
{0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},
|
||||
{0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202},
|
||||
{17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},
|
||||
{0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},
|
||||
{0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},
|
||||
{0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},
|
||||
{19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},
|
||||
{0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},
|
||||
{0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},
|
||||
{0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},
|
||||
{16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55},
|
||||
{0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},
|
||||
{0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},
|
||||
{0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},
|
||||
{0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},
|
||||
{20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},
|
||||
{0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},
|
||||
{0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},
|
||||
{17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},
|
||||
{0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},
|
||||
{0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},
|
||||
{0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},
|
||||
{20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},
|
||||
{0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},
|
||||
{0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},
|
||||
{0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
|
||||
{16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},
|
||||
{0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},
|
||||
{0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51},
|
||||
{0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},
|
||||
{0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},
|
||||
{0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},
|
||||
{0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},
|
||||
{0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},
|
||||
{16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},
|
||||
{0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},
|
||||
{0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},
|
||||
{0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258},
|
||||
{19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},
|
||||
{0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},
|
||||
{0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},
|
||||
{0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},
|
||||
{16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},
|
||||
{0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
|
||||
{0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},
|
||||
{0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},
|
||||
{0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},
|
||||
{64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},
|
||||
{0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},
|
||||
{0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},
|
||||
{18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},
|
||||
{0,9,255}
|
||||
};
|
||||
|
||||
static const code distfix[32] = {
|
||||
{16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},
|
||||
{21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},
|
||||
{18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385},
|
||||
{19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},
|
||||
{16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},
|
||||
{22,5,193},{64,5,0}
|
||||
};
|
||||
|
|
|
|||
1598
lib/libz/inflate.c
1598
lib/libz/inflate.c
File diff suppressed because it is too large
Load diff
117
lib/libz/inflate.h
Normal file
117
lib/libz/inflate.h
Normal file
|
|
@ -0,0 +1,117 @@
|
|||
/* inflate.h -- internal inflate state definition
|
||||
* Copyright (C) 1995-2003 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* WARNING: this file should *not* be used by applications. It is
|
||||
part of the implementation of the compression library and is
|
||||
subject to change. Applications should only use zlib.h.
|
||||
*/
|
||||
|
||||
/* define NO_GZIP when compiling if you want to disable gzip header and
|
||||
trailer decoding by inflate(). NO_GZIP would be used to avoid linking in
|
||||
the crc code when it is not needed. For shared libraries, gzip decoding
|
||||
should be left enabled. */
|
||||
#ifndef NO_GZIP
|
||||
# define GUNZIP
|
||||
#endif
|
||||
|
||||
/* Possible inflate modes between inflate() calls */
|
||||
typedef enum {
|
||||
HEAD, /* i: waiting for magic header */
|
||||
#ifdef GUNZIP
|
||||
FLAGS, /* i: waiting for method and flags (gzip) */
|
||||
TIME, /* i: waiting for modification time (gzip) */
|
||||
OS, /* i: waiting for extra flags and operating system (gzip) */
|
||||
EXLEN, /* i: waiting for extra length (gzip) */
|
||||
EXTRA, /* i: waiting for extra bytes (gzip) */
|
||||
NAME, /* i: waiting for end of file name (gzip) */
|
||||
COMMENT, /* i: waiting for end of comment (gzip) */
|
||||
HCRC, /* i: waiting for header crc (gzip) */
|
||||
#endif
|
||||
DICTID, /* i: waiting for dictionary check value */
|
||||
DICT, /* waiting for inflateSetDictionary() call */
|
||||
TYPE, /* i: waiting for type bits, including last-flag bit */
|
||||
TYPEDO, /* i: same, but skip check to exit inflate on new block */
|
||||
STORED, /* i: waiting for stored size (length and complement) */
|
||||
COPY, /* i/o: waiting for input or output to copy stored block */
|
||||
TABLE, /* i: waiting for dynamic block table lengths */
|
||||
LENLENS, /* i: waiting for code length code lengths */
|
||||
CODELENS, /* i: waiting for length/lit and distance code lengths */
|
||||
LEN, /* i: waiting for length/lit code */
|
||||
LENEXT, /* i: waiting for length extra bits */
|
||||
DIST, /* i: waiting for distance code */
|
||||
DISTEXT, /* i: waiting for distance extra bits */
|
||||
MATCH, /* o: waiting for output space to copy string */
|
||||
LIT, /* o: waiting for output space to write literal */
|
||||
CHECK, /* i: waiting for 32-bit check value */
|
||||
#ifdef GUNZIP
|
||||
LENGTH, /* i: waiting for 32-bit length (gzip) */
|
||||
#endif
|
||||
DONE, /* finished check, done -- remain here until reset */
|
||||
BAD, /* got a data error -- remain here until reset */
|
||||
MEM, /* got an inflate() memory error -- remain here until reset */
|
||||
SYNC /* looking for synchronization bytes to restart inflate() */
|
||||
} inflate_mode;
|
||||
|
||||
/*
|
||||
State transitions between above modes -
|
||||
|
||||
(most modes can go to the BAD or MEM mode -- not shown for clarity)
|
||||
|
||||
Process header:
|
||||
HEAD -> (gzip) or (zlib)
|
||||
(gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
|
||||
NAME -> COMMENT -> HCRC -> TYPE
|
||||
(zlib) -> DICTID or TYPE
|
||||
DICTID -> DICT -> TYPE
|
||||
Read deflate blocks:
|
||||
TYPE -> STORED or TABLE or LEN or CHECK
|
||||
STORED -> COPY -> TYPE
|
||||
TABLE -> LENLENS -> CODELENS -> LEN
|
||||
Read deflate codes:
|
||||
LEN -> LENEXT or LIT or TYPE
|
||||
LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
|
||||
LIT -> LEN
|
||||
Process trailer:
|
||||
CHECK -> LENGTH -> DONE
|
||||
*/
|
||||
|
||||
/* state maintained between inflate() calls. Approximately 7K bytes. */
|
||||
struct inflate_state {
|
||||
inflate_mode mode; /* current inflate mode */
|
||||
int last; /* true if processing last block */
|
||||
int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
|
||||
int havedict; /* true if dictionary provided */
|
||||
int flags; /* gzip header method and flags (0 if zlib) */
|
||||
unsigned long check; /* protected copy of check value */
|
||||
unsigned long total; /* protected copy of output count */
|
||||
/* sliding window */
|
||||
unsigned wbits; /* log base 2 of requested window size */
|
||||
unsigned wsize; /* window size or zero if not using window */
|
||||
unsigned whave; /* valid bytes in the window */
|
||||
unsigned write; /* window write index */
|
||||
unsigned char FAR *window; /* allocated sliding window, if needed */
|
||||
/* bit accumulator */
|
||||
unsigned long hold; /* input bit accumulator */
|
||||
unsigned bits; /* number of bits in "in" */
|
||||
/* for string and stored block copying */
|
||||
unsigned length; /* literal or length of data to copy */
|
||||
unsigned offset; /* distance back to copy string from */
|
||||
/* for table and code decoding */
|
||||
unsigned extra; /* extra bits needed */
|
||||
/* fixed and dynamic code tables */
|
||||
code const FAR *lencode; /* starting table for length/literal codes */
|
||||
code const FAR *distcode; /* starting table for distance codes */
|
||||
unsigned lenbits; /* index bits for lencode */
|
||||
unsigned distbits; /* index bits for distcode */
|
||||
/* dynamic table building */
|
||||
unsigned ncode; /* number of code length code lengths */
|
||||
unsigned nlen; /* number of length code lengths */
|
||||
unsigned ndist; /* number of distance code lengths */
|
||||
unsigned have; /* number of code lengths in lens[] */
|
||||
code FAR *next; /* next available space in codes[] */
|
||||
unsigned short lens[320]; /* temporary storage for code lengths */
|
||||
unsigned short work[288]; /* work area for code table building */
|
||||
code codes[ENOUGH]; /* space for code tables */
|
||||
};
|
||||
|
|
@ -1,454 +1,321 @@
|
|||
/* inftrees.c -- generate Huffman trees for efficient decoding
|
||||
* Copyright (C) 1995-2002 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
#include "zutil.h"
|
||||
#include "inftrees.h"
|
||||
|
||||
#if !defined(BUILDFIXED) && !defined(STDC)
|
||||
# define BUILDFIXED /* non ANSI compilers may not accept inffixed.h */
|
||||
#endif
|
||||
#define MAXBITS 15
|
||||
|
||||
const char inflate_copyright[] =
|
||||
" inflate 1.1.4 Copyright 1995-2002 Mark Adler ";
|
||||
" inflate 1.2.1 Copyright 1995-2003 Mark Adler ";
|
||||
/*
|
||||
If you use the zlib library in a product, an acknowledgment is welcome
|
||||
in the documentation of your product. If for some reason you cannot
|
||||
include such an acknowledgment, I would appreciate that you keep this
|
||||
copyright string in the executable of your product.
|
||||
*/
|
||||
struct internal_state {int dummy;}; /* for buggy compilers */
|
||||
|
||||
/* simplify the use of the inflate_huft type with some defines */
|
||||
#define exop word.what.Exop
|
||||
#define bits word.what.Bits
|
||||
|
||||
|
||||
local int huft_build OF((
|
||||
uIntf *, /* code lengths in bits */
|
||||
uInt, /* number of codes */
|
||||
uInt, /* number of "simple" codes */
|
||||
const uIntf *, /* list of base values for non-simple codes */
|
||||
const uIntf *, /* list of extra bits for non-simple codes */
|
||||
inflate_huft * FAR*,/* result: starting table */
|
||||
uIntf *, /* maximum lookup bits (returns actual) */
|
||||
inflate_huft *, /* space for trees */
|
||||
uInt *, /* hufts used in space */
|
||||
uIntf * )); /* space for values */
|
||||
|
||||
/* Tables for deflate from PKZIP's appnote.txt. */
|
||||
local const uInt cplens[31] = { /* Copy lengths for literal codes 257..285 */
|
||||
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
|
||||
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
|
||||
/* see note #13 above about 258 */
|
||||
local const uInt cplext[31] = { /* Extra bits for literal codes 257..285 */
|
||||
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
|
||||
3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 112, 112}; /* 112==invalid */
|
||||
local const uInt cpdist[30] = { /* Copy offsets for distance codes 0..29 */
|
||||
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
|
||||
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
|
||||
8193, 12289, 16385, 24577};
|
||||
local const uInt cpdext[30] = { /* Extra bits for distance codes */
|
||||
0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
|
||||
7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
|
||||
12, 12, 13, 13};
|
||||
|
||||
/*
|
||||
Huffman code decoding is performed using a multi-level table lookup.
|
||||
The fastest way to decode is to simply build a lookup table whose
|
||||
size is determined by the longest code. However, the time it takes
|
||||
to build this table can also be a factor if the data being decoded
|
||||
is not very long. The most common codes are necessarily the
|
||||
shortest codes, so those codes dominate the decoding time, and hence
|
||||
the speed. The idea is you can have a shorter table that decodes the
|
||||
shorter, more probable codes, and then point to subsidiary tables for
|
||||
the longer codes. The time it costs to decode the longer codes is
|
||||
then traded against the time it takes to make longer tables.
|
||||
|
||||
This results of this trade are in the variables lbits and dbits
|
||||
below. lbits is the number of bits the first level table for literal/
|
||||
length codes can decode in one step, and dbits is the same thing for
|
||||
the distance codes. Subsequent tables are also less than or equal to
|
||||
those sizes. These values may be adjusted either when all of the
|
||||
codes are shorter than that, in which case the longest code length in
|
||||
bits is used, or when the shortest code is *longer* than the requested
|
||||
table size, in which case the length of the shortest code in bits is
|
||||
used.
|
||||
|
||||
There are two different values for the two tables, since they code a
|
||||
different number of possibilities each. The literal/length table
|
||||
codes 286 possible values, or in a flat code, a little over eight
|
||||
bits. The distance table codes 30 possible values, or a little less
|
||||
than five bits, flat. The optimum values for speed end up being
|
||||
about one bit more than those, so lbits is 8+1 and dbits is 5+1.
|
||||
The optimum values may differ though from machine to machine, and
|
||||
possibly even between compilers. Your mileage may vary.
|
||||
Build a set of tables to decode the provided canonical Huffman code.
|
||||
The code lengths are lens[0..codes-1]. The result starts at *table,
|
||||
whose indices are 0..2^bits-1. work is a writable array of at least
|
||||
lens shorts, which is used as a work area. type is the type of code
|
||||
to be generated, CODES, LENS, or DISTS. On return, zero is success,
|
||||
-1 is an invalid code, and +1 means that ENOUGH isn't enough. table
|
||||
on return points to the next available entry's address. bits is the
|
||||
requested root table index bits, and on return it is the actual root
|
||||
table index bits. It will differ if the request is greater than the
|
||||
longest code or if it is less than the shortest code.
|
||||
*/
|
||||
|
||||
|
||||
/* If BMAX needs to be larger than 16, then h and x[] should be uLong. */
|
||||
#define BMAX 15 /* maximum bit length of any code */
|
||||
|
||||
local int huft_build(b, n, s, d, e, t, m, hp, hn, v)
|
||||
uIntf *b; /* code lengths in bits (all assumed <= BMAX) */
|
||||
uInt n; /* number of codes (assumed <= 288) */
|
||||
uInt s; /* number of simple-valued codes (0..s-1) */
|
||||
const uIntf *d; /* list of base values for non-simple codes */
|
||||
const uIntf *e; /* list of extra bits for non-simple codes */
|
||||
inflate_huft * FAR *t; /* result: starting table */
|
||||
uIntf *m; /* maximum lookup bits, returns actual */
|
||||
inflate_huft *hp; /* space for trees */
|
||||
uInt *hn; /* hufts used in space */
|
||||
uIntf *v; /* working area: values in order of bit length */
|
||||
/* Given a list of code lengths and a maximum table size, make a set of
|
||||
tables to decode that set of codes. Return Z_OK on success, Z_BUF_ERROR
|
||||
if the given code set is incomplete (the tables are still built in this
|
||||
case), or Z_DATA_ERROR if the input is invalid. */
|
||||
int inflate_table(type, lens, codes, table, bits, work)
|
||||
codetype type;
|
||||
unsigned short FAR *lens;
|
||||
unsigned codes;
|
||||
code FAR * FAR *table;
|
||||
unsigned FAR *bits;
|
||||
unsigned short FAR *work;
|
||||
{
|
||||
unsigned len; /* a code's length in bits */
|
||||
unsigned sym; /* index of code symbols */
|
||||
unsigned min, max; /* minimum and maximum code lengths */
|
||||
unsigned root; /* number of index bits for root table */
|
||||
unsigned curr; /* number of index bits for current table */
|
||||
unsigned drop; /* code bits to drop for sub-table */
|
||||
int left; /* number of prefix codes available */
|
||||
unsigned used; /* code entries in table used */
|
||||
unsigned huff; /* Huffman code */
|
||||
unsigned incr; /* for incrementing code, index */
|
||||
unsigned fill; /* index for replicating entries */
|
||||
unsigned low; /* low bits for current root entry */
|
||||
unsigned mask; /* mask for low root bits */
|
||||
code this; /* table entry for duplication */
|
||||
code FAR *next; /* next available space in table */
|
||||
const unsigned short FAR *base; /* base value table to use */
|
||||
const unsigned short FAR *extra; /* extra bits table to use */
|
||||
int end; /* use base and extra for symbol > end */
|
||||
unsigned short count[MAXBITS+1]; /* number of codes of each length */
|
||||
unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
|
||||
static const unsigned short lbase[31] = { /* Length codes 257..285 base */
|
||||
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
|
||||
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
|
||||
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
|
||||
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
|
||||
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 76, 66};
|
||||
static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
|
||||
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
|
||||
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
|
||||
8193, 12289, 16385, 24577, 0, 0};
|
||||
static const unsigned short dext[32] = { /* Distance codes 0..29 extra */
|
||||
16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
|
||||
23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
|
||||
28, 28, 29, 29, 64, 64};
|
||||
|
||||
uInt a; /* counter for codes of length k */
|
||||
uInt c[BMAX+1]; /* bit length count table */
|
||||
uInt f; /* i repeats in table every f entries */
|
||||
int g; /* maximum code length */
|
||||
int h; /* table level */
|
||||
register uInt i; /* counter, current code */
|
||||
register uInt j; /* counter */
|
||||
register int k; /* number of bits in current code */
|
||||
int l; /* bits per table (returned in m) */
|
||||
uInt mask; /* (1 << w) - 1, to avoid cc -O bug on HP */
|
||||
register uIntf *p; /* pointer into c[], b[], or v[] */
|
||||
inflate_huft *q; /* points to current table */
|
||||
struct inflate_huft_s r; /* table entry for structure assignment */
|
||||
inflate_huft *u[BMAX]; /* table stack */
|
||||
register int w; /* bits before this table == (l * h) */
|
||||
uInt x[BMAX+1]; /* bit offsets, then code stack */
|
||||
uIntf *xp; /* pointer into x */
|
||||
int y; /* number of dummy codes added */
|
||||
uInt z; /* number of entries in current table */
|
||||
/*
|
||||
Process a set of code lengths to create a canonical Huffman code. The
|
||||
code lengths are lens[0..codes-1]. Each length corresponds to the
|
||||
symbols 0..codes-1. The Huffman code is generated by first sorting the
|
||||
symbols by length from short to long, and retaining the symbol order
|
||||
for codes with equal lengths. Then the code starts with all zero bits
|
||||
for the first code of the shortest length, and the codes are integer
|
||||
increments for the same length, and zeros are appended as the length
|
||||
increases. For the deflate format, these bits are stored backwards
|
||||
from their more natural integer increment ordering, and so when the
|
||||
decoding tables are built in the large loop below, the integer codes
|
||||
are incremented backwards.
|
||||
|
||||
This routine assumes, but does not check, that all of the entries in
|
||||
lens[] are in the range 0..MAXBITS. The caller must assure this.
|
||||
1..MAXBITS is interpreted as that code length. zero means that that
|
||||
symbol does not occur in this code.
|
||||
|
||||
/* Generate counts for each bit length */
|
||||
p = c;
|
||||
#define C0 *p++ = 0;
|
||||
#define C2 C0 C0 C0 C0
|
||||
#define C4 C2 C2 C2 C2
|
||||
C4 /* clear c[]--assume BMAX+1 is 16 */
|
||||
p = b; i = n;
|
||||
do {
|
||||
c[*p++]++; /* assume all entries <= BMAX */
|
||||
} while (--i);
|
||||
if (c[0] == n) /* null input--all zero length codes */
|
||||
{
|
||||
*t = (inflate_huft *)Z_NULL;
|
||||
*m = 0;
|
||||
return Z_OK;
|
||||
}
|
||||
The codes are sorted by computing a count of codes for each length,
|
||||
creating from that a table of starting indices for each length in the
|
||||
sorted table, and then entering the symbols in order in the sorted
|
||||
table. The sorted table is work[], with that space being provided by
|
||||
the caller.
|
||||
|
||||
The length counts are used for other purposes as well, i.e. finding
|
||||
the minimum and maximum length codes, determining if there are any
|
||||
codes at all, checking for a valid set of lengths, and looking ahead
|
||||
at length counts to determine sub-table sizes when building the
|
||||
decoding tables.
|
||||
*/
|
||||
|
||||
/* Find minimum and maximum length, bound *m by those */
|
||||
l = *m;
|
||||
for (j = 1; j <= BMAX; j++)
|
||||
if (c[j])
|
||||
break;
|
||||
k = j; /* minimum code length */
|
||||
if ((uInt)l < j)
|
||||
l = j;
|
||||
for (i = BMAX; i; i--)
|
||||
if (c[i])
|
||||
break;
|
||||
g = i; /* maximum code length */
|
||||
if ((uInt)l > i)
|
||||
l = i;
|
||||
*m = l;
|
||||
/* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
|
||||
for (len = 0; len <= MAXBITS; len++)
|
||||
count[len] = 0;
|
||||
for (sym = 0; sym < codes; sym++)
|
||||
count[lens[sym]]++;
|
||||
|
||||
/* bound code lengths, force root to be within code lengths */
|
||||
root = *bits;
|
||||
for (max = MAXBITS; max >= 1; max--)
|
||||
if (count[max] != 0) break;
|
||||
if (root > max) root = max;
|
||||
if (max == 0) return -1; /* no codes! */
|
||||
for (min = 1; min <= MAXBITS; min++)
|
||||
if (count[min] != 0) break;
|
||||
if (root < min) root = min;
|
||||
|
||||
/* Adjust last length count to fill out codes, if needed */
|
||||
for (y = 1 << j; j < i; j++, y <<= 1)
|
||||
if ((y -= c[j]) < 0)
|
||||
return Z_DATA_ERROR;
|
||||
if ((y -= c[i]) < 0)
|
||||
return Z_DATA_ERROR;
|
||||
c[i] += y;
|
||||
/* check for an over-subscribed or incomplete set of lengths */
|
||||
left = 1;
|
||||
for (len = 1; len <= MAXBITS; len++) {
|
||||
left <<= 1;
|
||||
left -= count[len];
|
||||
if (left < 0) return -1; /* over-subscribed */
|
||||
}
|
||||
if (left > 0 && (type == CODES || (codes - count[0] != 1)))
|
||||
return -1; /* incomplete set */
|
||||
|
||||
/* generate offsets into symbol table for each length for sorting */
|
||||
offs[1] = 0;
|
||||
for (len = 1; len < MAXBITS; len++)
|
||||
offs[len + 1] = offs[len] + count[len];
|
||||
|
||||
/* Generate starting offsets into the value table for each length */
|
||||
x[1] = j = 0;
|
||||
p = c + 1; xp = x + 2;
|
||||
while (--i) { /* note that i == g from above */
|
||||
*xp++ = (j += *p++);
|
||||
}
|
||||
/* sort symbols by length, by symbol order within each length */
|
||||
for (sym = 0; sym < codes; sym++)
|
||||
if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
|
||||
|
||||
/*
|
||||
Create and fill in decoding tables. In this loop, the table being
|
||||
filled is at next and has curr index bits. The code being used is huff
|
||||
with length len. That code is converted to an index by dropping drop
|
||||
bits off of the bottom. For codes where len is less than drop + curr,
|
||||
those top drop + curr - len bits are incremented through all values to
|
||||
fill the table with replicated entries.
|
||||
|
||||
/* Make a table of values in order of bit lengths */
|
||||
p = b; i = 0;
|
||||
do {
|
||||
if ((j = *p++) != 0)
|
||||
v[x[j]++] = i;
|
||||
} while (++i < n);
|
||||
n = x[g]; /* set n to length of v */
|
||||
root is the number of index bits for the root table. When len exceeds
|
||||
root, sub-tables are created pointed to by the root entry with an index
|
||||
of the low root bits of huff. This is saved in low to check for when a
|
||||
new sub-table should be started. drop is zero when the root table is
|
||||
being filled, and drop is root when sub-tables are being filled.
|
||||
|
||||
When a new sub-table is needed, it is necessary to look ahead in the
|
||||
code lengths to determine what size sub-table is needed. The length
|
||||
counts are used for this, and so count[] is decremented as codes are
|
||||
entered in the tables.
|
||||
|
||||
/* Generate the Huffman codes and for each, make the table entries */
|
||||
x[0] = i = 0; /* first Huffman code is zero */
|
||||
p = v; /* grab values in bit order */
|
||||
h = -1; /* no tables yet--level -1 */
|
||||
w = -l; /* bits decoded == (l * h) */
|
||||
u[0] = (inflate_huft *)Z_NULL; /* just to keep compilers happy */
|
||||
q = (inflate_huft *)Z_NULL; /* ditto */
|
||||
z = 0; /* ditto */
|
||||
used keeps track of how many table entries have been allocated from the
|
||||
provided *table space. It is checked when a LENS table is being made
|
||||
against the space in *table, ENOUGH, minus the maximum space needed by
|
||||
the worst case distance code, MAXD. This should never happen, but the
|
||||
sufficiency of ENOUGH has not been proven exhaustively, hence the check.
|
||||
This assumes that when type == LENS, bits == 9.
|
||||
|
||||
/* go through the bit lengths (k already is bits in shortest code) */
|
||||
for (; k <= g; k++)
|
||||
{
|
||||
a = c[k];
|
||||
while (a--)
|
||||
{
|
||||
/* here i is the Huffman code of length k bits for value *p */
|
||||
/* make tables up to required level */
|
||||
while (k > w + l)
|
||||
{
|
||||
h++;
|
||||
w += l; /* previous table always l bits */
|
||||
sym increments through all symbols, and the loop terminates when
|
||||
all codes of length max, i.e. all codes, have been processed. This
|
||||
routine permits incomplete codes, so another loop after this one fills
|
||||
in the rest of the decoding tables with invalid code markers.
|
||||
*/
|
||||
|
||||
/* compute minimum size table less than or equal to l bits */
|
||||
z = g - w;
|
||||
z = z > (uInt)l ? l : z; /* table size upper limit */
|
||||
if ((f = 1 << (j = k - w)) > a + 1) /* try a k-w bit table */
|
||||
{ /* too few codes for k-w bit table */
|
||||
f -= a + 1; /* deduct codes from patterns left */
|
||||
xp = c + k;
|
||||
if (j < z)
|
||||
while (++j < z) /* try smaller tables up to z bits */
|
||||
{
|
||||
if ((f <<= 1) <= *++xp)
|
||||
break; /* enough codes to use up j bits */
|
||||
f -= *xp; /* else deduct codes from patterns */
|
||||
}
|
||||
/* set up for code type */
|
||||
switch (type) {
|
||||
case CODES:
|
||||
base = extra = work; /* dummy value--not used */
|
||||
end = 19;
|
||||
break;
|
||||
case LENS:
|
||||
base = lbase;
|
||||
base -= 257;
|
||||
extra = lext;
|
||||
extra -= 257;
|
||||
end = 256;
|
||||
break;
|
||||
default: /* DISTS */
|
||||
base = dbase;
|
||||
extra = dext;
|
||||
end = -1;
|
||||
}
|
||||
|
||||
/* initialize state for loop */
|
||||
huff = 0; /* starting code */
|
||||
sym = 0; /* starting code symbol */
|
||||
len = min; /* starting code length */
|
||||
next = *table; /* current table to fill in */
|
||||
curr = root; /* current table index bits */
|
||||
drop = 0; /* current bits to drop from code for index */
|
||||
low = (unsigned)(-1); /* trigger new sub-table when len > root */
|
||||
used = 1U << root; /* use root table entries */
|
||||
mask = used - 1; /* mask for comparing low */
|
||||
|
||||
/* check available table space */
|
||||
if (type == LENS && used >= ENOUGH - MAXD)
|
||||
return 1;
|
||||
|
||||
/* process all codes and make table entries */
|
||||
for (;;) {
|
||||
/* create table entry */
|
||||
this.bits = (unsigned char)(len - drop);
|
||||
if ((int)(work[sym]) < end) {
|
||||
this.op = (unsigned char)0;
|
||||
this.val = work[sym];
|
||||
}
|
||||
else if ((int)(work[sym]) > end) {
|
||||
this.op = (unsigned char)(extra[work[sym]]);
|
||||
this.val = base[work[sym]];
|
||||
}
|
||||
else {
|
||||
this.op = (unsigned char)(32 + 64); /* end of block */
|
||||
this.val = 0;
|
||||
}
|
||||
z = 1 << j; /* table entries for j-bit table */
|
||||
|
||||
/* allocate new table */
|
||||
if (*hn + z > MANY) /* (note: doesn't matter for fixed) */
|
||||
return Z_DATA_ERROR; /* overflow of MANY */
|
||||
u[h] = q = hp + *hn;
|
||||
*hn += z;
|
||||
/* replicate for those indices with low len bits equal to huff */
|
||||
incr = 1U << (len - drop);
|
||||
fill = 1U << curr;
|
||||
do {
|
||||
fill -= incr;
|
||||
next[(huff >> drop) + fill] = this;
|
||||
} while (fill != 0);
|
||||
|
||||
/* connect to last table, if there is one */
|
||||
if (h)
|
||||
{
|
||||
x[h] = i; /* save pattern for backing up */
|
||||
r.bits = (Byte)l; /* bits to dump before this table */
|
||||
r.exop = (Byte)j; /* bits in this table */
|
||||
j = i >> (w - l);
|
||||
r.base = (uInt)(q - u[h-1] - j); /* offset to this table */
|
||||
u[h-1][j] = r; /* connect to last table */
|
||||
/* backwards increment the len-bit code huff */
|
||||
incr = 1U << (len - 1);
|
||||
while (huff & incr)
|
||||
incr >>= 1;
|
||||
if (incr != 0) {
|
||||
huff &= incr - 1;
|
||||
huff += incr;
|
||||
}
|
||||
else
|
||||
*t = q; /* first table is returned result */
|
||||
}
|
||||
huff = 0;
|
||||
|
||||
/* set up table entry in r */
|
||||
r.bits = (Byte)(k - w);
|
||||
if (p >= v + n)
|
||||
r.exop = 128 + 64; /* out of values--invalid code */
|
||||
else if (*p < s)
|
||||
{
|
||||
r.exop = (Byte)(*p < 256 ? 0 : 32 + 64); /* 256 is end-of-block */
|
||||
r.base = *p++; /* simple code is just the value */
|
||||
}
|
||||
else
|
||||
{
|
||||
r.exop = (Byte)(e[*p - s] + 16 + 64);/* non-simple--look up in lists */
|
||||
r.base = d[*p++ - s];
|
||||
}
|
||||
/* go to next symbol, update count, len */
|
||||
sym++;
|
||||
if (--(count[len]) == 0) {
|
||||
if (len == max) break;
|
||||
len = lens[work[sym]];
|
||||
}
|
||||
|
||||
/* fill code-like entries with r */
|
||||
f = 1 << (k - w);
|
||||
for (j = i >> w; j < z; j += f)
|
||||
q[j] = r;
|
||||
/* create new sub-table if needed */
|
||||
if (len > root && (huff & mask) != low) {
|
||||
/* if first time, transition to sub-tables */
|
||||
if (drop == 0)
|
||||
drop = root;
|
||||
|
||||
/* backwards increment the k-bit code i */
|
||||
for (j = 1 << (k - 1); i & j; j >>= 1)
|
||||
i ^= j;
|
||||
i ^= j;
|
||||
/* increment past last table */
|
||||
next += 1U << curr;
|
||||
|
||||
/* backup over finished tables */
|
||||
mask = (1 << w) - 1; /* needed on HP, cc -O bug */
|
||||
while ((i & mask) != x[h])
|
||||
{
|
||||
h--; /* don't need to update q */
|
||||
w -= l;
|
||||
mask = (1 << w) - 1;
|
||||
}
|
||||
/* determine length of next table */
|
||||
curr = len - drop;
|
||||
left = (int)(1 << curr);
|
||||
while (curr + drop < max) {
|
||||
left -= count[curr + drop];
|
||||
if (left <= 0) break;
|
||||
curr++;
|
||||
left <<= 1;
|
||||
}
|
||||
|
||||
/* check for enough space */
|
||||
used += 1U << curr;
|
||||
if (type == LENS && used >= ENOUGH - MAXD)
|
||||
return 1;
|
||||
|
||||
/* point entry in root table to sub-table */
|
||||
low = huff & mask;
|
||||
(*table)[low].op = (unsigned char)curr;
|
||||
(*table)[low].bits = (unsigned char)root;
|
||||
(*table)[low].val = (unsigned short)(next - *table);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
Fill in rest of table for incomplete codes. This loop is similar to the
|
||||
loop above in incrementing huff for table indices. It is assumed that
|
||||
len is equal to curr + drop, so there is no loop needed to increment
|
||||
through high index bits. When the current sub-table is filled, the loop
|
||||
drops back to the root table to fill in any remaining entries there.
|
||||
*/
|
||||
this.op = (unsigned char)64; /* invalid code marker */
|
||||
this.bits = (unsigned char)(len - drop);
|
||||
this.val = (unsigned short)0;
|
||||
while (huff != 0) {
|
||||
/* when done with sub-table, drop back to root table */
|
||||
if (drop != 0 && (huff & mask) != low) {
|
||||
drop = 0;
|
||||
len = root;
|
||||
next = *table;
|
||||
curr = root;
|
||||
this.bits = (unsigned char)len;
|
||||
}
|
||||
|
||||
/* Return Z_BUF_ERROR if we were given an incomplete table */
|
||||
return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
|
||||
}
|
||||
|
||||
|
||||
int inflate_trees_bits(c, bb, tb, hp, z)
|
||||
uIntf *c; /* 19 code lengths */
|
||||
uIntf *bb; /* bits tree desired/actual depth */
|
||||
inflate_huft * FAR *tb; /* bits tree result */
|
||||
inflate_huft *hp; /* space for trees */
|
||||
z_streamp z; /* for messages */
|
||||
{
|
||||
int r;
|
||||
uInt hn = 0; /* hufts used in space */
|
||||
uIntf *v; /* work area for huft_build */
|
||||
|
||||
if ((v = (uIntf*)ZALLOC(z, 19, sizeof(uInt))) == Z_NULL)
|
||||
return Z_MEM_ERROR;
|
||||
r = huft_build(c, 19, 19, (uIntf*)Z_NULL, (uIntf*)Z_NULL,
|
||||
tb, bb, hp, &hn, v);
|
||||
if (r == Z_DATA_ERROR)
|
||||
z->msg = (char*)"oversubscribed dynamic bit lengths tree";
|
||||
else if (r == Z_BUF_ERROR || *bb == 0)
|
||||
{
|
||||
z->msg = (char*)"incomplete dynamic bit lengths tree";
|
||||
r = Z_DATA_ERROR;
|
||||
}
|
||||
ZFREE(z, v);
|
||||
return r;
|
||||
}
|
||||
|
||||
|
||||
int inflate_trees_dynamic(nl, nd, c, bl, bd, tl, td, hp, z)
|
||||
uInt nl; /* number of literal/length codes */
|
||||
uInt nd; /* number of distance codes */
|
||||
uIntf *c; /* that many (total) code lengths */
|
||||
uIntf *bl; /* literal desired/actual bit depth */
|
||||
uIntf *bd; /* distance desired/actual bit depth */
|
||||
inflate_huft * FAR *tl; /* literal/length tree result */
|
||||
inflate_huft * FAR *td; /* distance tree result */
|
||||
inflate_huft *hp; /* space for trees */
|
||||
z_streamp z; /* for messages */
|
||||
{
|
||||
int r;
|
||||
uInt hn = 0; /* hufts used in space */
|
||||
uIntf *v; /* work area for huft_build */
|
||||
|
||||
/* allocate work area */
|
||||
if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
|
||||
return Z_MEM_ERROR;
|
||||
|
||||
/* build literal/length tree */
|
||||
r = huft_build(c, nl, 257, cplens, cplext, tl, bl, hp, &hn, v);
|
||||
if (r != Z_OK || *bl == 0)
|
||||
{
|
||||
if (r == Z_DATA_ERROR)
|
||||
z->msg = (char*)"oversubscribed literal/length tree";
|
||||
else if (r != Z_MEM_ERROR)
|
||||
{
|
||||
z->msg = (char*)"incomplete literal/length tree";
|
||||
r = Z_DATA_ERROR;
|
||||
}
|
||||
ZFREE(z, v);
|
||||
return r;
|
||||
}
|
||||
|
||||
/* build distance tree */
|
||||
r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, hp, &hn, v);
|
||||
if (r != Z_OK || (*bd == 0 && nl > 257))
|
||||
{
|
||||
if (r == Z_DATA_ERROR)
|
||||
z->msg = (char*)"oversubscribed distance tree";
|
||||
else if (r == Z_BUF_ERROR) {
|
||||
#ifdef PKZIP_BUG_WORKAROUND
|
||||
r = Z_OK;
|
||||
}
|
||||
#else
|
||||
z->msg = (char*)"incomplete distance tree";
|
||||
r = Z_DATA_ERROR;
|
||||
}
|
||||
else if (r != Z_MEM_ERROR)
|
||||
{
|
||||
z->msg = (char*)"empty distance tree with lengths";
|
||||
r = Z_DATA_ERROR;
|
||||
}
|
||||
ZFREE(z, v);
|
||||
return r;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* done */
|
||||
ZFREE(z, v);
|
||||
return Z_OK;
|
||||
}
|
||||
|
||||
|
||||
/* build fixed tables only once--keep them here */
|
||||
#ifdef BUILDFIXED
|
||||
local int fixed_built = 0;
|
||||
#define FIXEDH 544 /* number of hufts used by fixed tables */
|
||||
local inflate_huft fixed_mem[FIXEDH];
|
||||
local uInt fixed_bl;
|
||||
local uInt fixed_bd;
|
||||
local inflate_huft *fixed_tl;
|
||||
local inflate_huft *fixed_td;
|
||||
#else
|
||||
#include "inffixed.h"
|
||||
#endif
|
||||
|
||||
|
||||
int inflate_trees_fixed(bl, bd, tl, td, z)
|
||||
uIntf *bl; /* literal desired/actual bit depth */
|
||||
uIntf *bd; /* distance desired/actual bit depth */
|
||||
inflate_huft * FAR *tl; /* literal/length tree result */
|
||||
inflate_huft * FAR *td; /* distance tree result */
|
||||
z_streamp z; /* for memory allocation */
|
||||
{
|
||||
#ifdef BUILDFIXED
|
||||
/* build fixed tables if not already */
|
||||
if (!fixed_built)
|
||||
{
|
||||
int k; /* temporary variable */
|
||||
uInt f = 0; /* number of hufts used in fixed_mem */
|
||||
uIntf *c; /* length list for huft_build */
|
||||
uIntf *v; /* work area for huft_build */
|
||||
|
||||
/* allocate memory */
|
||||
if ((c = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
|
||||
return Z_MEM_ERROR;
|
||||
if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
|
||||
{
|
||||
ZFREE(z, c);
|
||||
return Z_MEM_ERROR;
|
||||
}
|
||||
|
||||
/* literal table */
|
||||
for (k = 0; k < 144; k++)
|
||||
c[k] = 8;
|
||||
for (; k < 256; k++)
|
||||
c[k] = 9;
|
||||
for (; k < 280; k++)
|
||||
c[k] = 7;
|
||||
for (; k < 288; k++)
|
||||
c[k] = 8;
|
||||
fixed_bl = 9;
|
||||
huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl,
|
||||
fixed_mem, &f, v);
|
||||
|
||||
/* distance table */
|
||||
for (k = 0; k < 30; k++)
|
||||
c[k] = 5;
|
||||
fixed_bd = 5;
|
||||
huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd,
|
||||
fixed_mem, &f, v);
|
||||
|
||||
/* done */
|
||||
ZFREE(z, v);
|
||||
ZFREE(z, c);
|
||||
fixed_built = 1;
|
||||
}
|
||||
#endif
|
||||
*bl = fixed_bl;
|
||||
*bd = fixed_bd;
|
||||
*tl = fixed_tl;
|
||||
*td = fixed_td;
|
||||
return Z_OK;
|
||||
/* put invalid code marker in table */
|
||||
next[huff >> drop] = this;
|
||||
|
||||
/* backwards increment the len-bit code huff */
|
||||
incr = 1U << (len - 1);
|
||||
while (huff & incr)
|
||||
incr >>= 1;
|
||||
if (incr != 0) {
|
||||
huff &= incr - 1;
|
||||
huff += incr;
|
||||
}
|
||||
else
|
||||
huff = 0;
|
||||
}
|
||||
|
||||
/* set return parameters */
|
||||
*table += used;
|
||||
*bits = root;
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/* inftrees.h -- header to use inftrees.c
|
||||
* Copyright (C) 1995-2002 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* WARNING: this file should *not* be used by applications. It is
|
||||
|
|
@ -8,51 +8,48 @@
|
|||
subject to change. Applications should only use zlib.h.
|
||||
*/
|
||||
|
||||
/* Huffman code lookup table entry--this entry is four bytes for machines
|
||||
that have 16-bit pointers (e.g. PC's in the small or medium model). */
|
||||
/* Structure for decoding tables. Each entry provides either the
|
||||
information needed to do the operation requested by the code that
|
||||
indexed that table entry, or it provides a pointer to another
|
||||
table that indexes more bits of the code. op indicates whether
|
||||
the entry is a pointer to another table, a literal, a length or
|
||||
distance, an end-of-block, or an invalid code. For a table
|
||||
pointer, the low four bits of op is the number of index bits of
|
||||
that table. For a length or distance, the low four bits of op
|
||||
is the number of extra bits to get after the code. bits is
|
||||
the number of bits in this code or part of the code to drop off
|
||||
of the bit buffer. val is the actual byte to output in the case
|
||||
of a literal, the base length or distance, or the offset from
|
||||
the current table to the next table. Each entry is four bytes. */
|
||||
typedef struct {
|
||||
unsigned char op; /* operation, extra bits, table bits */
|
||||
unsigned char bits; /* bits in this part of the code */
|
||||
unsigned short val; /* offset in table or code value */
|
||||
} code;
|
||||
|
||||
typedef struct inflate_huft_s FAR inflate_huft;
|
||||
|
||||
struct inflate_huft_s {
|
||||
union {
|
||||
struct {
|
||||
Byte Exop; /* number of extra bits or operation */
|
||||
Byte Bits; /* number of bits in this code or subcode */
|
||||
} what;
|
||||
uInt pad; /* pad structure to a power of 2 (4 bytes for */
|
||||
} word; /* 16-bit, 8 bytes for 32-bit int's) */
|
||||
uInt base; /* literal, length base, distance base,
|
||||
or table offset */
|
||||
};
|
||||
/* op values as set by inflate_table():
|
||||
00000000 - literal
|
||||
0000tttt - table link, tttt != 0 is the number of table index bits
|
||||
0001eeee - length or distance, eeee is the number of extra bits
|
||||
01100000 - end of block
|
||||
01000000 - invalid code
|
||||
*/
|
||||
|
||||
/* Maximum size of dynamic tree. The maximum found in a long but non-
|
||||
exhaustive search was 1004 huft structures (850 for length/literals
|
||||
exhaustive search was 1004 code structures (850 for length/literals
|
||||
and 154 for distances, the latter actually the result of an
|
||||
exhaustive search). The actual maximum is not known, but the
|
||||
value below is more than safe. */
|
||||
#define MANY 1440
|
||||
exhaustive search). The true maximum is not known, but the value
|
||||
below is more than safe. */
|
||||
#define ENOUGH 1440
|
||||
#define MAXD 154
|
||||
|
||||
extern int inflate_trees_bits OF((
|
||||
uIntf *, /* 19 code lengths */
|
||||
uIntf *, /* bits tree desired/actual depth */
|
||||
inflate_huft * FAR *, /* bits tree result */
|
||||
inflate_huft *, /* space for trees */
|
||||
z_streamp)); /* for messages */
|
||||
/* Type of code to build for inftable() */
|
||||
typedef enum {
|
||||
CODES,
|
||||
LENS,
|
||||
DISTS
|
||||
} codetype;
|
||||
|
||||
extern int inflate_trees_dynamic OF((
|
||||
uInt, /* number of literal/length codes */
|
||||
uInt, /* number of distance codes */
|
||||
uIntf *, /* that many (total) code lengths */
|
||||
uIntf *, /* literal desired/actual bit depth */
|
||||
uIntf *, /* distance desired/actual bit depth */
|
||||
inflate_huft * FAR *, /* literal/length tree result */
|
||||
inflate_huft * FAR *, /* distance tree result */
|
||||
inflate_huft *, /* space for trees */
|
||||
z_streamp)); /* for messages */
|
||||
|
||||
extern int inflate_trees_fixed OF((
|
||||
uIntf *, /* literal desired/actual bit depth */
|
||||
uIntf *, /* distance desired/actual bit depth */
|
||||
inflate_huft * FAR *, /* literal/length tree result */
|
||||
inflate_huft * FAR *, /* distance tree result */
|
||||
z_streamp)); /* for memory allocation */
|
||||
extern int inflate_table OF((codetype type, unsigned short FAR *lens,
|
||||
unsigned codes, code FAR * FAR *table,
|
||||
unsigned FAR *bits, unsigned short FAR *work));
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/* minigzip.c -- simulate gzip using the zlib compression library
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/*
|
||||
|
|
@ -31,7 +31,7 @@
|
|||
# include <sys/stat.h>
|
||||
#endif
|
||||
|
||||
#if defined(MSDOS) || defined(OS2) || defined(WIN32)
|
||||
#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
|
||||
# include <fcntl.h>
|
||||
# include <io.h>
|
||||
# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
|
||||
|
|
@ -112,7 +112,7 @@ void gz_compress(in, out)
|
|||
if (gz_compress_mmap(in, out) == Z_OK) return;
|
||||
#endif
|
||||
for (;;) {
|
||||
len = fread(buf, 1, sizeof(buf), in);
|
||||
len = (int)fread(buf, 1, sizeof(buf), in);
|
||||
if (ferror(in)) {
|
||||
perror("fread");
|
||||
exit(1);
|
||||
|
|
@ -147,7 +147,7 @@ int gz_compress_mmap(in, out)
|
|||
if (buf_len <= 0) return Z_ERRNO;
|
||||
|
||||
/* Now do the actual mmap: */
|
||||
buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
|
||||
buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
|
||||
if (buf == (caddr_t)(-1)) return Z_ERRNO;
|
||||
|
||||
/* Compress the whole file at once: */
|
||||
|
|
@ -179,8 +179,8 @@ void gz_uncompress(in, out)
|
|||
if (len == 0) break;
|
||||
|
||||
if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {
|
||||
error("failed fwrite");
|
||||
}
|
||||
error("failed fwrite");
|
||||
}
|
||||
}
|
||||
if (fclose(out)) error("failed fclose");
|
||||
|
||||
|
|
@ -229,7 +229,7 @@ void file_uncompress(file)
|
|||
char *infile, *outfile;
|
||||
FILE *out;
|
||||
gzFile in;
|
||||
int len = strlen(file);
|
||||
uInt len = (uInt)strlen(file);
|
||||
|
||||
strcpy(buf, file);
|
||||
|
||||
|
|
@ -260,10 +260,11 @@ void file_uncompress(file)
|
|||
|
||||
|
||||
/* ===========================================================================
|
||||
* Usage: minigzip [-d] [-f] [-h] [-1 to -9] [files...]
|
||||
* Usage: minigzip [-d] [-f] [-h] [-r] [-1 to -9] [files...]
|
||||
* -d : decompress
|
||||
* -f : compress with Z_FILTERED
|
||||
* -h : compress with Z_HUFFMAN_ONLY
|
||||
* -r : compress with Z_RLE
|
||||
* -1 to -9 : compression level
|
||||
*/
|
||||
|
||||
|
|
@ -282,16 +283,18 @@ int main(argc, argv)
|
|||
|
||||
while (argc > 0) {
|
||||
if (strcmp(*argv, "-d") == 0)
|
||||
uncompr = 1;
|
||||
uncompr = 1;
|
||||
else if (strcmp(*argv, "-f") == 0)
|
||||
outmode[3] = 'f';
|
||||
outmode[3] = 'f';
|
||||
else if (strcmp(*argv, "-h") == 0)
|
||||
outmode[3] = 'h';
|
||||
outmode[3] = 'h';
|
||||
else if (strcmp(*argv, "-r") == 0)
|
||||
outmode[3] = 'R';
|
||||
else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' &&
|
||||
(*argv)[2] == 0)
|
||||
outmode[2] = (*argv)[1];
|
||||
(*argv)[2] == 0)
|
||||
outmode[2] = (*argv)[1];
|
||||
else
|
||||
break;
|
||||
break;
|
||||
argc--, argv++;
|
||||
}
|
||||
if (argc == 0) {
|
||||
|
|
@ -315,6 +318,5 @@ int main(argc, argv)
|
|||
}
|
||||
} while (argv++, --argc);
|
||||
}
|
||||
exit(0);
|
||||
return 0; /* to avoid warning */
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/* trees.c -- output deflated data using Huffman coding
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/*
|
||||
|
|
@ -230,7 +230,6 @@ local void send_bits(s, value, length)
|
|||
#endif /* DEBUG */
|
||||
|
||||
|
||||
#define MAX(a,b) (a >= b ? a : b)
|
||||
/* the arguments must not have side effects */
|
||||
|
||||
/* ===========================================================================
|
||||
|
|
@ -335,42 +334,42 @@ void gen_trees_header()
|
|||
|
||||
Assert (header != NULL, "Can't open trees.h");
|
||||
fprintf(header,
|
||||
"/* header created automatically with -DGEN_TREES_H */\n\n");
|
||||
"/* header created automatically with -DGEN_TREES_H */\n\n");
|
||||
|
||||
fprintf(header, "local const ct_data static_ltree[L_CODES+2] = {\n");
|
||||
for (i = 0; i < L_CODES+2; i++) {
|
||||
fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,
|
||||
static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
|
||||
fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,
|
||||
static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
|
||||
}
|
||||
|
||||
fprintf(header, "local const ct_data static_dtree[D_CODES] = {\n");
|
||||
for (i = 0; i < D_CODES; i++) {
|
||||
fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,
|
||||
static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
|
||||
fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,
|
||||
static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
|
||||
}
|
||||
|
||||
fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n");
|
||||
for (i = 0; i < DIST_CODE_LEN; i++) {
|
||||
fprintf(header, "%2u%s", _dist_code[i],
|
||||
SEPARATOR(i, DIST_CODE_LEN-1, 20));
|
||||
fprintf(header, "%2u%s", _dist_code[i],
|
||||
SEPARATOR(i, DIST_CODE_LEN-1, 20));
|
||||
}
|
||||
|
||||
fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");
|
||||
for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {
|
||||
fprintf(header, "%2u%s", _length_code[i],
|
||||
SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
|
||||
fprintf(header, "%2u%s", _length_code[i],
|
||||
SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
|
||||
}
|
||||
|
||||
fprintf(header, "local const int base_length[LENGTH_CODES] = {\n");
|
||||
for (i = 0; i < LENGTH_CODES; i++) {
|
||||
fprintf(header, "%1u%s", base_length[i],
|
||||
SEPARATOR(i, LENGTH_CODES-1, 20));
|
||||
fprintf(header, "%1u%s", base_length[i],
|
||||
SEPARATOR(i, LENGTH_CODES-1, 20));
|
||||
}
|
||||
|
||||
fprintf(header, "local const int base_dist[D_CODES] = {\n");
|
||||
for (i = 0; i < D_CODES; i++) {
|
||||
fprintf(header, "%5u%s", base_dist[i],
|
||||
SEPARATOR(i, D_CODES-1, 10));
|
||||
fprintf(header, "%5u%s", base_dist[i],
|
||||
SEPARATOR(i, D_CODES-1, 10));
|
||||
}
|
||||
|
||||
fclose(header);
|
||||
|
|
@ -675,7 +674,8 @@ local void build_tree(s, desc)
|
|||
|
||||
/* Create a new node father of n and m */
|
||||
tree[node].Freq = tree[n].Freq + tree[m].Freq;
|
||||
s->depth[node] = (uch) (MAX(s->depth[n], s->depth[m]) + 1);
|
||||
s->depth[node] = (uch)((s->depth[n] >= s->depth[m] ?
|
||||
s->depth[n] : s->depth[m]) + 1);
|
||||
tree[n].Dad = tree[m].Dad = (ush)node;
|
||||
#ifdef DUMP_BL_TREE
|
||||
if (tree == s->bl_tree) {
|
||||
|
|
@ -930,39 +930,39 @@ void _tr_flush_block(s, buf, stored_len, eof)
|
|||
/* Build the Huffman trees unless a stored block is forced */
|
||||
if (s->level > 0) {
|
||||
|
||||
/* Check if the file is ascii or binary */
|
||||
if (s->data_type == Z_UNKNOWN) set_data_type(s);
|
||||
/* Check if the file is ascii or binary */
|
||||
if (s->data_type == Z_UNKNOWN) set_data_type(s);
|
||||
|
||||
/* Construct the literal and distance trees */
|
||||
build_tree(s, (tree_desc *)(&(s->l_desc)));
|
||||
Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
|
||||
s->static_len));
|
||||
/* Construct the literal and distance trees */
|
||||
build_tree(s, (tree_desc *)(&(s->l_desc)));
|
||||
Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
|
||||
s->static_len));
|
||||
|
||||
build_tree(s, (tree_desc *)(&(s->d_desc)));
|
||||
Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
|
||||
s->static_len));
|
||||
/* At this point, opt_len and static_len are the total bit lengths of
|
||||
* the compressed block data, excluding the tree representations.
|
||||
*/
|
||||
build_tree(s, (tree_desc *)(&(s->d_desc)));
|
||||
Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
|
||||
s->static_len));
|
||||
/* At this point, opt_len and static_len are the total bit lengths of
|
||||
* the compressed block data, excluding the tree representations.
|
||||
*/
|
||||
|
||||
/* Build the bit length tree for the above two trees, and get the index
|
||||
* in bl_order of the last bit length code to send.
|
||||
*/
|
||||
max_blindex = build_bl_tree(s);
|
||||
/* Build the bit length tree for the above two trees, and get the index
|
||||
* in bl_order of the last bit length code to send.
|
||||
*/
|
||||
max_blindex = build_bl_tree(s);
|
||||
|
||||
/* Determine the best encoding. Compute first the block length in bytes*/
|
||||
opt_lenb = (s->opt_len+3+7)>>3;
|
||||
static_lenb = (s->static_len+3+7)>>3;
|
||||
/* Determine the best encoding. Compute the block lengths in bytes. */
|
||||
opt_lenb = (s->opt_len+3+7)>>3;
|
||||
static_lenb = (s->static_len+3+7)>>3;
|
||||
|
||||
Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
|
||||
opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
|
||||
s->last_lit));
|
||||
Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
|
||||
opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
|
||||
s->last_lit));
|
||||
|
||||
if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
|
||||
if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
|
||||
|
||||
} else {
|
||||
Assert(buf != (char*)0, "lost buf");
|
||||
opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
|
||||
opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
|
||||
}
|
||||
|
||||
#ifdef FORCE_STORED
|
||||
|
|
@ -1107,7 +1107,8 @@ local void compress_block(s, ltree, dtree)
|
|||
} /* literal or match pair ? */
|
||||
|
||||
/* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
|
||||
Assert(s->pending < s->lit_bufsize + 2*lx, "pendingBuf overflow");
|
||||
Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
|
||||
"pendingBuf overflow");
|
||||
|
||||
} while (lx < s->last_lit);
|
||||
|
||||
|
|
@ -1199,7 +1200,7 @@ local void copy_block(s, buf, len, header)
|
|||
s->last_eob_len = 8; /* enough lookahead for inflate */
|
||||
|
||||
if (header) {
|
||||
put_short(s, (ush)len);
|
||||
put_short(s, (ush)len);
|
||||
put_short(s, (ush)~len);
|
||||
#ifdef DEBUG
|
||||
s->bits_sent += 2*16;
|
||||
|
|
|
|||
|
|
@ -1,10 +1,11 @@
|
|||
/* uncompr.c -- decompress a memory buffer
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#define ZLIB_INTERNAL
|
||||
#include "zlib.h"
|
||||
|
||||
/* ===========================================================================
|
||||
|
|
@ -49,7 +50,9 @@ int ZEXPORT uncompress (dest, destLen, source, sourceLen)
|
|||
err = inflate(&stream, Z_FINISH);
|
||||
if (err != Z_STREAM_END) {
|
||||
inflateEnd(&stream);
|
||||
return err == Z_OK ? Z_BUF_ERROR : err;
|
||||
if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
|
||||
return Z_DATA_ERROR;
|
||||
return err;
|
||||
}
|
||||
*destLen = stream.total_out;
|
||||
|
||||
|
|
|
|||
262
lib/libz/zconf.h
262
lib/libz/zconf.h
|
|
@ -1,102 +1,126 @@
|
|||
/* zconf.h -- configuration of the zlib compression library
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#ifndef _ZCONF_H
|
||||
#define _ZCONF_H
|
||||
#ifndef ZCONF_H
|
||||
#define ZCONF_H
|
||||
|
||||
/*
|
||||
* If you *really* need a unique prefix for all types and library functions,
|
||||
* compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
|
||||
*/
|
||||
#ifdef Z_PREFIX
|
||||
# define deflateInit_ z_deflateInit_
|
||||
# define deflate z_deflate
|
||||
# define deflateEnd z_deflateEnd
|
||||
# define inflateInit_ z_inflateInit_
|
||||
# define inflate z_inflate
|
||||
# define inflateEnd z_inflateEnd
|
||||
# define deflateInit2_ z_deflateInit2_
|
||||
# define deflateInit_ z_deflateInit_
|
||||
# define deflate z_deflate
|
||||
# define deflateEnd z_deflateEnd
|
||||
# define inflateInit_ z_inflateInit_
|
||||
# define inflate z_inflate
|
||||
# define inflateEnd z_inflateEnd
|
||||
# define deflateInit2_ z_deflateInit2_
|
||||
# define deflateSetDictionary z_deflateSetDictionary
|
||||
# define deflateCopy z_deflateCopy
|
||||
# define deflateReset z_deflateReset
|
||||
# define deflateParams z_deflateParams
|
||||
# define inflateInit2_ z_inflateInit2_
|
||||
# define deflateCopy z_deflateCopy
|
||||
# define deflateReset z_deflateReset
|
||||
# define deflatePrime z_deflatePrime
|
||||
# define deflateParams z_deflateParams
|
||||
# define deflateBound z_deflateBound
|
||||
# define inflateInit2_ z_inflateInit2_
|
||||
# define inflateSetDictionary z_inflateSetDictionary
|
||||
# define inflateSync z_inflateSync
|
||||
# define inflateSync z_inflateSync
|
||||
# define inflateSyncPoint z_inflateSyncPoint
|
||||
# define inflateReset z_inflateReset
|
||||
# define compress z_compress
|
||||
# define compress2 z_compress2
|
||||
# define uncompress z_uncompress
|
||||
# define adler32 z_adler32
|
||||
# define crc32 z_crc32
|
||||
# define inflateCopy z_inflateCopy
|
||||
# define inflateReset z_inflateReset
|
||||
# define compress z_compress
|
||||
# define compress2 z_compress2
|
||||
# define compressBound z_compressBound
|
||||
# define uncompress z_uncompress
|
||||
# define adler32 z_adler32
|
||||
# define crc32 z_crc32
|
||||
# define get_crc_table z_get_crc_table
|
||||
|
||||
# define Byte z_Byte
|
||||
# define uInt z_uInt
|
||||
# define uLong z_uLong
|
||||
# define Bytef z_Bytef
|
||||
# define charf z_charf
|
||||
# define intf z_intf
|
||||
# define uIntf z_uIntf
|
||||
# define uLongf z_uLongf
|
||||
# define voidpf z_voidpf
|
||||
# define voidp z_voidp
|
||||
# define Byte z_Byte
|
||||
# define uInt z_uInt
|
||||
# define uLong z_uLong
|
||||
# define Bytef z_Bytef
|
||||
# define charf z_charf
|
||||
# define intf z_intf
|
||||
# define uIntf z_uIntf
|
||||
# define uLongf z_uLongf
|
||||
# define voidpf z_voidpf
|
||||
# define voidp z_voidp
|
||||
#endif
|
||||
|
||||
#if defined(__MSDOS__) && !defined(MSDOS)
|
||||
# define MSDOS
|
||||
#endif
|
||||
#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
|
||||
# define OS2
|
||||
#endif
|
||||
#if defined(_WINDOWS) && !defined(WINDOWS)
|
||||
# define WINDOWS
|
||||
#endif
|
||||
#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
|
||||
# define WIN32
|
||||
#endif
|
||||
#if defined(__GNUC__) || defined(WIN32) || defined(__386__) || defined(i386)
|
||||
# ifndef __32BIT__
|
||||
# define __32BIT__
|
||||
#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
|
||||
# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
|
||||
# ifndef SYS16BIT
|
||||
# define SYS16BIT
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
#if defined(__MSDOS__) && !defined(MSDOS)
|
||||
# define MSDOS
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Compile with -DMAXSEG_64K if the alloc function cannot allocate more
|
||||
* than 64k bytes at a time (needed on systems with 16-bit int).
|
||||
*/
|
||||
#if defined(MSDOS) && !defined(__32BIT__)
|
||||
#ifdef SYS16BIT
|
||||
# define MAXSEG_64K
|
||||
#endif
|
||||
#ifdef MSDOS
|
||||
# define UNALIGNED_OK
|
||||
#endif
|
||||
|
||||
#if (defined(MSDOS) || defined(_WINDOWS) || defined(WIN32)) && !defined(STDC)
|
||||
# define STDC
|
||||
#endif
|
||||
#if defined(__STDC__) || defined(__cplusplus) || defined(__OS2__)
|
||||
#ifdef __STDC_VERSION__
|
||||
# ifndef STDC
|
||||
# define STDC
|
||||
# endif
|
||||
# if __STDC_VERSION__ >= 199901L
|
||||
# ifndef STDC99
|
||||
# define STDC99
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
|
||||
# define STDC
|
||||
#endif
|
||||
#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
|
||||
# define STDC
|
||||
#endif
|
||||
#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
|
||||
# define STDC
|
||||
#endif
|
||||
#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
|
||||
# define STDC
|
||||
#endif
|
||||
|
||||
#if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */
|
||||
# define STDC
|
||||
#endif
|
||||
|
||||
#ifndef STDC
|
||||
# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
|
||||
# define const
|
||||
# define const /* note: need a more gentle solution here */
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* Some Mac compilers merge all .h files incorrectly: */
|
||||
#if defined(__MWERKS__) || defined(applec) ||defined(THINK_C) ||defined(__SC__)
|
||||
#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
|
||||
# define NO_DUMMY_DECL
|
||||
#endif
|
||||
|
||||
/* Old Borland C incorrectly complains about missing returns: */
|
||||
#if defined(__BORLANDC__) && (__BORLANDC__ < 0x500)
|
||||
# define NEED_DUMMY_RETURN
|
||||
#endif
|
||||
|
||||
|
||||
/* Maximum value for memLevel in deflateInit2 */
|
||||
#ifndef MAX_MEM_LEVEL
|
||||
# ifdef MAXSEG_64K
|
||||
|
|
@ -144,73 +168,87 @@
|
|||
* to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
|
||||
* just define FAR to be empty.
|
||||
*/
|
||||
#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(__32BIT__)
|
||||
/* MSC small or medium model */
|
||||
# define SMALL_MEDIUM
|
||||
# ifdef _MSC_VER
|
||||
# define FAR _far
|
||||
# else
|
||||
# define FAR far
|
||||
# endif
|
||||
#endif
|
||||
#if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
|
||||
# ifndef __32BIT__
|
||||
#ifdef SYS16BIT
|
||||
# if defined(M_I86SM) || defined(M_I86MM)
|
||||
/* MSC small or medium model */
|
||||
# define SMALL_MEDIUM
|
||||
# define FAR _far
|
||||
# ifdef _MSC_VER
|
||||
# define FAR _far
|
||||
# else
|
||||
# define FAR far
|
||||
# endif
|
||||
# endif
|
||||
# if (defined(__SMALL__) || defined(__MEDIUM__))
|
||||
/* Turbo C small or medium model */
|
||||
# define SMALL_MEDIUM
|
||||
# ifdef __BORLANDC__
|
||||
# define FAR _far
|
||||
# else
|
||||
# define FAR far
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* Compile with -DZLIB_DLL for Windows DLL support */
|
||||
#if defined(ZLIB_DLL)
|
||||
# if defined(_WINDOWS) || defined(WINDOWS)
|
||||
#if defined(WINDOWS) || defined(WIN32)
|
||||
/* If building or using zlib as a DLL, define ZLIB_DLL.
|
||||
* This is not mandatory, but it offers a little performance increase.
|
||||
*/
|
||||
# ifdef ZLIB_DLL
|
||||
# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
|
||||
# ifdef ZLIB_INTERNAL
|
||||
# define ZEXTERN extern __declspec(dllexport)
|
||||
# else
|
||||
# define ZEXTERN extern __declspec(dllimport)
|
||||
# endif
|
||||
# endif
|
||||
# endif /* ZLIB_DLL */
|
||||
/* If building or using zlib with the WINAPI/WINAPIV calling convention,
|
||||
* define ZLIB_WINAPI.
|
||||
* Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
|
||||
*/
|
||||
# ifdef ZLIB_WINAPI
|
||||
# ifdef FAR
|
||||
# undef FAR
|
||||
# endif
|
||||
# include <windows.h>
|
||||
# define ZEXPORT WINAPI
|
||||
/* No need for _export, use ZLIB.DEF instead. */
|
||||
/* For complete Windows compatibility, use WINAPI, not __stdcall. */
|
||||
# define ZEXPORT WINAPI
|
||||
# ifdef WIN32
|
||||
# define ZEXPORTVA WINAPIV
|
||||
# define ZEXPORTVA WINAPIV
|
||||
# else
|
||||
# define ZEXPORTVA FAR _cdecl _export
|
||||
# endif
|
||||
# endif
|
||||
# if defined (__BORLANDC__)
|
||||
# if (__BORLANDC__ >= 0x0500) && defined (WIN32)
|
||||
# include <windows.h>
|
||||
# define ZEXPORT __declspec(dllexport) WINAPI
|
||||
# define ZEXPORTRVA __declspec(dllexport) WINAPIV
|
||||
# else
|
||||
# if defined (_Windows) && defined (__DLL__)
|
||||
# define ZEXPORT _export
|
||||
# define ZEXPORTVA _export
|
||||
# endif
|
||||
# define ZEXPORTVA FAR CDECL
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#if defined (__BEOS__)
|
||||
# if defined (ZLIB_DLL)
|
||||
# define ZEXTERN extern __declspec(dllexport)
|
||||
# else
|
||||
# define ZEXTERN extern __declspec(dllimport)
|
||||
# ifdef ZLIB_DLL
|
||||
# ifdef ZLIB_INTERNAL
|
||||
# define ZEXPORT __declspec(dllexport)
|
||||
# define ZEXPORTVA __declspec(dllexport)
|
||||
# else
|
||||
# define ZEXPORT __declspec(dllimport)
|
||||
# define ZEXPORTVA __declspec(dllimport)
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifndef ZEXTERN
|
||||
# define ZEXTERN extern
|
||||
#endif
|
||||
#ifndef ZEXPORT
|
||||
# define ZEXPORT
|
||||
#endif
|
||||
#ifndef ZEXPORTVA
|
||||
# define ZEXPORTVA
|
||||
#endif
|
||||
#ifndef ZEXTERN
|
||||
# define ZEXTERN extern
|
||||
#endif
|
||||
|
||||
#ifndef FAR
|
||||
# define FAR
|
||||
# define FAR
|
||||
#endif
|
||||
|
||||
#if !defined(MACOS) && !defined(TARGET_OS_MAC)
|
||||
#if !defined(__MACTYPES__)
|
||||
typedef unsigned char Byte; /* 8 bits */
|
||||
#endif
|
||||
typedef unsigned int uInt; /* 16 bits or more */
|
||||
|
|
@ -228,16 +266,21 @@ typedef uInt FAR uIntf;
|
|||
typedef uLong FAR uLongf;
|
||||
|
||||
#ifdef STDC
|
||||
typedef void FAR *voidpf;
|
||||
typedef void *voidp;
|
||||
typedef void const *voidpc;
|
||||
typedef void FAR *voidpf;
|
||||
typedef void *voidp;
|
||||
#else
|
||||
typedef Byte FAR *voidpf;
|
||||
typedef Byte *voidp;
|
||||
typedef Byte const *voidpc;
|
||||
typedef Byte FAR *voidpf;
|
||||
typedef Byte *voidp;
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_UNISTD_H
|
||||
#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */
|
||||
# include <sys/types.h> /* for off_t */
|
||||
# include <unistd.h> /* for SEEK_* and off_t */
|
||||
# ifdef VMS
|
||||
# include <unixio.h> /* for off_t */
|
||||
# endif
|
||||
# define z_off_t off_t
|
||||
#endif
|
||||
#ifndef SEEK_SET
|
||||
|
|
@ -249,31 +292,32 @@ typedef uLong FAR uLongf;
|
|||
# define z_off_t long
|
||||
#endif
|
||||
|
||||
#if defined(__OS400__)
|
||||
#define NO_vsnprintf
|
||||
#endif
|
||||
|
||||
#if defined(__MVS__)
|
||||
# define NO_vsnprintf
|
||||
# ifdef FAR
|
||||
# undef FAR
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* MVS linker does not support external names larger than 8 bytes */
|
||||
#if defined(__MVS__)
|
||||
# pragma map(deflateInit_,"DEIN")
|
||||
# pragma map(deflateInit2_,"DEIN2")
|
||||
# pragma map(deflateEnd,"DEEND")
|
||||
# pragma map(deflateBound,"DEBND")
|
||||
# pragma map(inflateInit_,"ININ")
|
||||
# pragma map(inflateInit2_,"ININ2")
|
||||
# pragma map(inflateEnd,"INEND")
|
||||
# pragma map(inflateSync,"INSY")
|
||||
# pragma map(inflateSetDictionary,"INSEDI")
|
||||
# pragma map(inflate_blocks,"INBL")
|
||||
# pragma map(inflate_blocks_new,"INBLNE")
|
||||
# pragma map(inflate_blocks_free,"INBLFR")
|
||||
# pragma map(inflate_blocks_reset,"INBLRE")
|
||||
# pragma map(inflate_codes_free,"INCOFR")
|
||||
# pragma map(inflate_codes,"INCO")
|
||||
# pragma map(compressBound,"CMBND")
|
||||
# pragma map(inflate_table,"INTABL")
|
||||
# pragma map(inflate_fast,"INFA")
|
||||
# pragma map(inflate_flush,"INFLU")
|
||||
# pragma map(inflate_mask,"INMA")
|
||||
# pragma map(inflate_set_dictionary,"INSEDI2")
|
||||
# pragma map(inflate_copyright,"INCOPY")
|
||||
# pragma map(inflate_trees_bits,"INTRBI")
|
||||
# pragma map(inflate_trees_dynamic,"INTRDY")
|
||||
# pragma map(inflate_trees_fixed,"INTRFI")
|
||||
# pragma map(inflate_trees_free,"INTRFR")
|
||||
#endif
|
||||
|
||||
#endif /* _ZCONF_H */
|
||||
#endif /* ZCONF_H */
|
||||
|
|
|
|||
110
lib/libz/zlib.3
110
lib/libz/zlib.3
|
|
@ -1,4 +1,4 @@
|
|||
.TH ZLIB 3 "11 March 2002"
|
||||
.TH ZLIB 3 "17 November 2003"
|
||||
.SH NAME
|
||||
zlib \- compression/decompression library
|
||||
.SH SYNOPSIS
|
||||
|
|
@ -13,7 +13,8 @@ The code is thread safe.
|
|||
It provides in-memory compression and decompression functions,
|
||||
including integrity checks of the uncompressed data.
|
||||
This version of the library supports only one compression method (deflation)
|
||||
but other algorithms will be added later and will have the same stream interface.
|
||||
but other algorithms will be added later
|
||||
and will have the same stream interface.
|
||||
.LP
|
||||
Compression can be done in a single step if the buffers are large enough
|
||||
(for example if an input file is mmap'ed),
|
||||
|
|
@ -23,66 +24,117 @@ the application must provide more input and/or consume the output
|
|||
(providing more output space) before each call.
|
||||
.LP
|
||||
The library also supports reading and writing files in
|
||||
.I gzip
|
||||
.IR gzip (1)
|
||||
(.gz) format
|
||||
with an interface similar to that of stdio.
|
||||
.LP
|
||||
The library does not install any signal handler. The decoder checks
|
||||
the consistency of the compressed data, so the library should never
|
||||
crash even in case of corrupted input.
|
||||
The library does not install any signal handler.
|
||||
The decoder checks the consistency of the compressed data,
|
||||
so the library should never crash even in case of corrupted input.
|
||||
.LP
|
||||
All functions of the compression library are documented in the file
|
||||
.IR zlib.h.
|
||||
.IR zlib.h .
|
||||
The distribution source includes examples of use of the library
|
||||
the files
|
||||
in the files
|
||||
.I example.c
|
||||
and
|
||||
.IR minigzip.c .
|
||||
.LP
|
||||
Changes to this version are documented in the file
|
||||
.I ChangeLog
|
||||
that accompanies the source,
|
||||
and are concerned primarily with bug fixes and portability enhancements.
|
||||
.LP
|
||||
A Java implementation of
|
||||
.IR zlib
|
||||
is available in the Java Development Kit 1.1
|
||||
.I zlib
|
||||
is available in the Java Development Kit 1.1:
|
||||
.IP
|
||||
http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
|
||||
.LP
|
||||
A Perl interface to
|
||||
.IR zlib ,
|
||||
written by Paul Marquess (pmarquess@bfsec.bt.co.uk)
|
||||
written by Paul Marquess (pmqs@cpan.org),
|
||||
is available at CPAN (Comprehensive Perl Archive Network) sites,
|
||||
such as:
|
||||
including:
|
||||
.IP
|
||||
ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
|
||||
http://www.cpan.org/modules/by-module/Compress/
|
||||
.LP
|
||||
A Python interface to
|
||||
.IR zlib
|
||||
written by A.M. Kuchling <amk@magnet.com>
|
||||
is available from the Python Software Association sites, such as:
|
||||
.IR zlib ,
|
||||
written by A.M. Kuchling (amk@magnet.com),
|
||||
is available in Python 1.5 and later versions:
|
||||
.IP
|
||||
ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz
|
||||
http://www.python.org/doc/lib/module-zlib.html
|
||||
.LP
|
||||
A
|
||||
.I zlib
|
||||
binding for
|
||||
.IR tcl (1),
|
||||
written by Andreas Kupries (a.kupries@westend.com),
|
||||
is availlable at:
|
||||
.IP
|
||||
http://www.westend.com/~kupries/doc/trf/man/man.html
|
||||
.LP
|
||||
An experimental package to read and write files in .zip format,
|
||||
written on top of
|
||||
.I zlib
|
||||
by Gilles Vollant (info@winimage.com),
|
||||
is available at:
|
||||
.IP
|
||||
http://www.winimage.com/zLibDll/unzip.html
|
||||
and also in the
|
||||
.I contrib/minizip
|
||||
directory of the main
|
||||
.I zlib
|
||||
web site.
|
||||
.SH "SEE ALSO"
|
||||
Questions about zlib should be sent to:
|
||||
The
|
||||
.I zlib
|
||||
web site can be found at either of these locations:
|
||||
.IP
|
||||
zlib@quest.jpl.nasa.gov
|
||||
or, if this fails, to the author addresses given below.
|
||||
The zlib home page is:
|
||||
.IP
|
||||
http://www.cdrom.com/pub/infozip/zlib/
|
||||
http://www.zlib.org
|
||||
.br
|
||||
http://www.gzip.org/zlib/
|
||||
.LP
|
||||
The data format used by the zlib library is described by RFC
|
||||
(Request for Comments) 1950 to 1952 in the files:
|
||||
(Request for Comments) 1950 to 1952 in the files:
|
||||
.IP
|
||||
ftp://ds.internic.net/rfc/rfc1950.txt (zlib format)
|
||||
http://www.ietf.org/rfc/rfc1950.txt (concerning zlib format)
|
||||
.br
|
||||
rfc1951.txt (deflate format)
|
||||
http://www.ietf.org/rfc/rfc1951.txt (concerning deflate format)
|
||||
.br
|
||||
rfc1952.txt (gzip format)
|
||||
http://www.ietf.org/rfc/rfc1952.txt (concerning gzip format)
|
||||
.LP
|
||||
These documents are also available in other formats from:
|
||||
.IP
|
||||
ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
|
||||
.LP
|
||||
Mark Nelson (markn@ieee.org) wrote an article about
|
||||
.I zlib
|
||||
for the Jan. 1997 issue of Dr. Dobb's Journal;
|
||||
a copy of the article is available at:
|
||||
.IP
|
||||
http://dogma.net/markn/articles/zlibtool/zlibtool.htm
|
||||
.SH "REPORTING PROBLEMS"
|
||||
Before reporting a problem,
|
||||
please check the
|
||||
.I zlib
|
||||
web site to verify that you have the latest version of
|
||||
.IR zlib ;
|
||||
otherwise,
|
||||
obtain the latest version and see if the problem still exists.
|
||||
Please read the
|
||||
.I zlib
|
||||
FAQ at:
|
||||
.IP
|
||||
http://www.gzip.org/zlib/zlib_faq.html
|
||||
.LP
|
||||
before asking for help.
|
||||
Send questions and/or comments to zlib@gzip.org,
|
||||
or (for the Windows DLL version) to Gilles Vollant (info@winimage.com).
|
||||
.SH AUTHORS
|
||||
Version 1.1.4
|
||||
Copyright (C) 1995-2002 Jean-loup Gailly (jloup@gzip.org)
|
||||
Version 1.2.1
|
||||
Copyright (C) 1995-2003 Jean-loup Gailly (jloup@gzip.org)
|
||||
and Mark Adler (madler@alumni.caltech.edu).
|
||||
.LP
|
||||
This software is provided "as-is,"
|
||||
|
|
|
|||
463
lib/libz/zlib.h
463
lib/libz/zlib.h
|
|
@ -1,7 +1,7 @@
|
|||
/* zlib.h -- interface of the 'zlib' general purpose compression library
|
||||
version 1.1.4, March 11th, 2002
|
||||
version 1.2.1, November 17th, 2003
|
||||
|
||||
Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
|
||||
Copyright (C) 1995-2003 Jean-loup Gailly and Mark Adler
|
||||
|
||||
This software is provided 'as-is', without any express or implied
|
||||
warranty. In no event will the authors be held liable for any damages
|
||||
|
|
@ -24,12 +24,12 @@
|
|||
|
||||
|
||||
The data format used by the zlib library is described by RFCs (Request for
|
||||
Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
|
||||
Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
|
||||
(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
|
||||
*/
|
||||
|
||||
#ifndef _ZLIB_H
|
||||
#define _ZLIB_H
|
||||
#ifndef ZLIB_H
|
||||
#define ZLIB_H
|
||||
|
||||
#include "zconf.h"
|
||||
|
||||
|
|
@ -37,9 +37,10 @@
|
|||
extern "C" {
|
||||
#endif
|
||||
|
||||
#define ZLIB_VERSION "1.1.4"
|
||||
#define ZLIB_VERSION "1.2.1"
|
||||
#define ZLIB_VERNUM 0x1210
|
||||
|
||||
/*
|
||||
/*
|
||||
The 'zlib' compression library provides in-memory compression and
|
||||
decompression functions, including integrity checks of the uncompressed
|
||||
data. This version of the library supports only one compression method
|
||||
|
|
@ -52,8 +53,23 @@ extern "C" {
|
|||
application must provide more input and/or consume the output
|
||||
(providing more output space) before each call.
|
||||
|
||||
The compressed data format used by the in-memory functions is the zlib
|
||||
format, which is a zlib wrapper documented in RFC 1950, wrapped around a
|
||||
deflate stream, which is itself documented in RFC 1951.
|
||||
|
||||
The library also supports reading and writing files in gzip (.gz) format
|
||||
with an interface similar to that of stdio.
|
||||
with an interface similar to that of stdio using the functions that start
|
||||
with "gz". The gzip format is different from the zlib format. gzip is a
|
||||
gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
|
||||
|
||||
The zlib format was designed to be compact and fast for use in memory
|
||||
and on communications channels. The gzip format was designed for single-
|
||||
file compression on file systems, has a larger header than zlib to maintain
|
||||
directory information, and uses a different, slower check method than zlib.
|
||||
|
||||
This library does not provide any functions to write gzip files in memory.
|
||||
However such functions could be easily written using zlib's deflate function,
|
||||
the documentation in the gzip RFC, and the examples in gzio.c.
|
||||
|
||||
The library does not install any signal handler. The decoder checks
|
||||
the consistency of the compressed data, so the library should never
|
||||
|
|
@ -127,7 +143,8 @@ typedef z_stream FAR *z_streamp;
|
|||
#define Z_SYNC_FLUSH 2
|
||||
#define Z_FULL_FLUSH 3
|
||||
#define Z_FINISH 4
|
||||
/* Allowed flush values; see deflate() below for details */
|
||||
#define Z_BLOCK 5
|
||||
/* Allowed flush values; see deflate() and inflate() below for details */
|
||||
|
||||
#define Z_OK 0
|
||||
#define Z_STREAM_END 1
|
||||
|
|
@ -150,13 +167,14 @@ typedef z_stream FAR *z_streamp;
|
|||
|
||||
#define Z_FILTERED 1
|
||||
#define Z_HUFFMAN_ONLY 2
|
||||
#define Z_RLE 3
|
||||
#define Z_DEFAULT_STRATEGY 0
|
||||
/* compression strategy; see deflateInit2() below for details */
|
||||
|
||||
#define Z_BINARY 0
|
||||
#define Z_ASCII 1
|
||||
#define Z_UNKNOWN 2
|
||||
/* Possible values of the data_type field */
|
||||
/* Possible values of the data_type field (though see inflate()) */
|
||||
|
||||
#define Z_DEFLATED 8
|
||||
/* The deflate compression method (the only one supported in this version) */
|
||||
|
|
@ -175,7 +193,7 @@ ZEXTERN const char * ZEXPORT zlibVersion OF((void));
|
|||
This check is automatically made by deflateInit and inflateInit.
|
||||
*/
|
||||
|
||||
/*
|
||||
/*
|
||||
ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
|
||||
|
||||
Initializes the internal stream state for compression. The fields
|
||||
|
|
@ -244,7 +262,9 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
|
|||
If deflate returns with avail_out == 0, this function must be called again
|
||||
with the same value of the flush parameter and more output space (updated
|
||||
avail_out), until the flush is complete (deflate returns with non-zero
|
||||
avail_out).
|
||||
avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
|
||||
avail_out is greater than six to avoid repeated flush markers due to
|
||||
avail_out == 0 on return.
|
||||
|
||||
If the parameter flush is set to Z_FINISH, pending input is processed,
|
||||
pending output is flushed and deflate returns with Z_STREAM_END if there
|
||||
|
|
@ -253,10 +273,10 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
|
|||
more input data, until it returns with Z_STREAM_END or an error. After
|
||||
deflate has returned Z_STREAM_END, the only possible operations on the
|
||||
stream are deflateReset or deflateEnd.
|
||||
|
||||
|
||||
Z_FINISH can be used immediately after deflateInit if all the compression
|
||||
is to be done in a single step. In this case, avail_out must be at least
|
||||
0.1% larger than avail_in plus 12 bytes. If deflate does not return
|
||||
the value returned by deflateBound (see below). If deflate does not return
|
||||
Z_STREAM_END, then it must be called again as described above.
|
||||
|
||||
deflate() sets strm->adler to the adler32 checksum of all input read
|
||||
|
|
@ -272,7 +292,9 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
|
|||
consumed and all output has been produced (only when flush is set to
|
||||
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
|
||||
if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
|
||||
(for example avail_in or avail_out was zero).
|
||||
(for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
|
||||
fatal, and deflate() can be called again with more input and more output
|
||||
space to continue compressing.
|
||||
*/
|
||||
|
||||
|
||||
|
|
@ -290,7 +312,7 @@ ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
|
|||
*/
|
||||
|
||||
|
||||
/*
|
||||
/*
|
||||
ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
|
||||
|
||||
Initializes the internal stream state for decompression. The fields
|
||||
|
|
@ -314,9 +336,9 @@ ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
|
|||
ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
|
||||
/*
|
||||
inflate decompresses as much data as possible, and stops when the input
|
||||
buffer becomes empty or the output buffer becomes full. It may some
|
||||
introduce some output latency (reading input without producing any output)
|
||||
except when forced to flush.
|
||||
buffer becomes empty or the output buffer becomes full. It may introduce
|
||||
some output latency (reading input without producing any output) except when
|
||||
forced to flush.
|
||||
|
||||
The detailed semantics are as follows. inflate performs one or both of the
|
||||
following actions:
|
||||
|
|
@ -340,11 +362,26 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
|
|||
must be called again after making room in the output buffer because there
|
||||
might be more output pending.
|
||||
|
||||
If the parameter flush is set to Z_SYNC_FLUSH, inflate flushes as much
|
||||
output as possible to the output buffer. The flushing behavior of inflate is
|
||||
not specified for values of the flush parameter other than Z_SYNC_FLUSH
|
||||
and Z_FINISH, but the current implementation actually flushes as much output
|
||||
as possible anyway.
|
||||
The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
|
||||
Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
|
||||
output as possible to the output buffer. Z_BLOCK requests that inflate() stop
|
||||
if and when it get to the next deflate block boundary. When decoding the zlib
|
||||
or gzip format, this will cause inflate() to return immediately after the
|
||||
header and before the first block. When doing a raw inflate, inflate() will
|
||||
go ahead and process the first block, and will return when it gets to the end
|
||||
of that block, or when it runs out of data.
|
||||
|
||||
The Z_BLOCK option assists in appending to or combining deflate streams.
|
||||
Also to assist in this, on return inflate() will set strm->data_type to the
|
||||
number of unused bits in the last byte taken from strm->next_in, plus 64
|
||||
if inflate() is currently decoding the last block in the deflate stream,
|
||||
plus 128 if inflate() returned immediately after decoding an end-of-block
|
||||
code or decoding the complete header up to just before the first byte of the
|
||||
deflate stream. The end-of-block will not be indicated until all of the
|
||||
uncompressed data from that block has been written to strm->next_out. The
|
||||
number of unused bits may in general be greater than seven, except when
|
||||
bit 7 of data_type is set, in which case the number of unused bits will be
|
||||
less than eight.
|
||||
|
||||
inflate() should normally be called until it returns Z_STREAM_END or an
|
||||
error. However if all decompression is to be performed in a single step
|
||||
|
|
@ -354,29 +391,44 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
|
|||
uncompressed data. (The size of the uncompressed data may have been saved
|
||||
by the compressor for this purpose.) The next operation on this stream must
|
||||
be inflateEnd to deallocate the decompression state. The use of Z_FINISH
|
||||
is never required, but can be used to inform inflate that a faster routine
|
||||
is never required, but can be used to inform inflate that a faster approach
|
||||
may be used for the single inflate() call.
|
||||
|
||||
If a preset dictionary is needed at this point (see inflateSetDictionary
|
||||
below), inflate sets strm-adler to the adler32 checksum of the
|
||||
dictionary chosen by the compressor and returns Z_NEED_DICT; otherwise
|
||||
it sets strm->adler to the adler32 checksum of all output produced
|
||||
so far (that is, total_out bytes) and returns Z_OK, Z_STREAM_END or
|
||||
an error code as described below. At the end of the stream, inflate()
|
||||
checks that its computed adler32 checksum is equal to that saved by the
|
||||
compressor and returns Z_STREAM_END only if the checksum is correct.
|
||||
In this implementation, inflate() always flushes as much output as
|
||||
possible to the output buffer, and always uses the faster approach on the
|
||||
first call. So the only effect of the flush parameter in this implementation
|
||||
is on the return value of inflate(), as noted below, or when it returns early
|
||||
because Z_BLOCK is used.
|
||||
|
||||
If a preset dictionary is needed after this call (see inflateSetDictionary
|
||||
below), inflate sets strm-adler to the adler32 checksum of the dictionary
|
||||
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
|
||||
strm->adler to the adler32 checksum of all output produced so far (that is,
|
||||
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
|
||||
below. At the end of the stream, inflate() checks that its computed adler32
|
||||
checksum is equal to that saved by the compressor and returns Z_STREAM_END
|
||||
only if the checksum is correct.
|
||||
|
||||
inflate() will decompress and check either zlib-wrapped or gzip-wrapped
|
||||
deflate data. The header type is detected automatically. Any information
|
||||
contained in the gzip header is not retained, so applications that need that
|
||||
information should instead use raw inflate, see inflateInit2() below, or
|
||||
inflateBack() and perform their own processing of the gzip header and
|
||||
trailer.
|
||||
|
||||
inflate() returns Z_OK if some progress has been made (more input processed
|
||||
or more output produced), Z_STREAM_END if the end of the compressed data has
|
||||
been reached and all uncompressed output has been produced, Z_NEED_DICT if a
|
||||
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
|
||||
corrupted (input stream not conforming to the zlib format or incorrect
|
||||
adler32 checksum), Z_STREAM_ERROR if the stream structure was inconsistent
|
||||
(for example if next_in or next_out was NULL), Z_MEM_ERROR if there was not
|
||||
enough memory, Z_BUF_ERROR if no progress is possible or if there was not
|
||||
enough room in the output buffer when Z_FINISH is used. In the Z_DATA_ERROR
|
||||
case, the application may then call inflateSync to look for a good
|
||||
compression block.
|
||||
corrupted (input stream not conforming to the zlib format or incorrect check
|
||||
value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
|
||||
if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
|
||||
Z_BUF_ERROR if no progress is possible or if there was not enough room in the
|
||||
output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
|
||||
inflate() can be called again with more input and more output space to
|
||||
continue decompressing. If Z_DATA_ERROR is returned, the application may then
|
||||
call inflateSync() to look for a good compression block if a partial recovery
|
||||
of the data is desired.
|
||||
*/
|
||||
|
||||
|
||||
|
|
@ -397,7 +449,7 @@ ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
|
|||
The following functions are needed only in some special applications.
|
||||
*/
|
||||
|
||||
/*
|
||||
/*
|
||||
ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
|
||||
int level,
|
||||
int method,
|
||||
|
|
@ -413,11 +465,21 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
|
|||
this version of the library.
|
||||
|
||||
The windowBits parameter is the base two logarithm of the window size
|
||||
(the size of the history buffer). It should be in the range 8..15 for this
|
||||
(the size of the history buffer). It should be in the range 8..15 for this
|
||||
version of the library. Larger values of this parameter result in better
|
||||
compression at the expense of memory usage. The default value is 15 if
|
||||
deflateInit is used instead.
|
||||
|
||||
windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
|
||||
determines the window size. deflate() will then generate raw deflate data
|
||||
with no zlib header or trailer, and will not compute an adler32 check value.
|
||||
|
||||
windowBits can also be greater than 15 for optional gzip encoding. Add
|
||||
16 to windowBits to write a simple gzip header and trailer around the
|
||||
compressed data instead of a zlib wrapper. The gzip header will have no
|
||||
file name, no extra data, no comment, no modification time (set to zero),
|
||||
no header crc, and the operating system will be set to 255 (unknown).
|
||||
|
||||
The memLevel parameter specifies how much memory should be allocated
|
||||
for the internal compression state. memLevel=1 uses minimum memory but
|
||||
is slow and reduces compression ratio; memLevel=9 uses maximum memory
|
||||
|
|
@ -426,21 +488,23 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
|
|||
|
||||
The strategy parameter is used to tune the compression algorithm. Use the
|
||||
value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
|
||||
filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman encoding only (no
|
||||
string match). Filtered data consists mostly of small values with a
|
||||
somewhat random distribution. In this case, the compression algorithm is
|
||||
tuned to compress them better. The effect of Z_FILTERED is to force more
|
||||
Huffman coding and less string matching; it is somewhat intermediate
|
||||
between Z_DEFAULT and Z_HUFFMAN_ONLY. The strategy parameter only affects
|
||||
the compression ratio but not the correctness of the compressed output even
|
||||
if it is not set appropriately.
|
||||
filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no
|
||||
string match), or Z_RLE to limit match distances to one (run-length
|
||||
encoding). Filtered data consists mostly of small values with a somewhat
|
||||
random distribution. In this case, the compression algorithm is tuned to
|
||||
compress them better. The effect of Z_FILTERED is to force more Huffman
|
||||
coding and less string matching; it is somewhat intermediate between
|
||||
Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
|
||||
Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
|
||||
parameter only affects the compression ratio but not the correctness of the
|
||||
compressed output even if it is not set appropriately.
|
||||
|
||||
deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
||||
memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
|
||||
method). msg is set to null if there is no error message. deflateInit2 does
|
||||
not perform any compression: this will be done by deflate().
|
||||
*/
|
||||
|
||||
|
||||
ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
|
||||
const Bytef *dictionary,
|
||||
uInt dictLength));
|
||||
|
|
@ -464,11 +528,12 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
|
|||
deflate or deflate2. Thus the strings most likely to be useful should be
|
||||
put at the end of the dictionary, not at the front.
|
||||
|
||||
Upon return of this function, strm->adler is set to the Adler32 value
|
||||
Upon return of this function, strm->adler is set to the adler32 value
|
||||
of the dictionary; the decompressor may later use this value to determine
|
||||
which dictionary has been used by the compressor. (The Adler32 value
|
||||
which dictionary has been used by the compressor. (The adler32 value
|
||||
applies to the whole dictionary even if only a subset of the dictionary is
|
||||
actually used by the compressor.)
|
||||
actually used by the compressor.) If a raw deflate was requested, then the
|
||||
adler32 value is not computed and strm->adler is not set.
|
||||
|
||||
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
|
||||
parameter is invalid (such as NULL dictionary) or the stream state is
|
||||
|
|
@ -507,8 +572,8 @@ ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
|
|||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
|
||||
int level,
|
||||
int strategy));
|
||||
int level,
|
||||
int strategy));
|
||||
/*
|
||||
Dynamically update the compression level and compression strategy. The
|
||||
interpretation of level and strategy is as in deflateInit2. This can be
|
||||
|
|
@ -527,7 +592,32 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
|
|||
if strm->avail_out was zero.
|
||||
*/
|
||||
|
||||
/*
|
||||
ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
|
||||
uLong sourceLen));
|
||||
/*
|
||||
deflateBound() returns an upper bound on the compressed size after
|
||||
deflation of sourceLen bytes. It must be called after deflateInit()
|
||||
or deflateInit2(). This would be used to allocate an output buffer
|
||||
for deflation in a single pass, and so would be called before deflate().
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
|
||||
int bits,
|
||||
int value));
|
||||
/*
|
||||
deflatePrime() inserts bits in the deflate output stream. The intent
|
||||
is that this function is used to start off the deflate output with the
|
||||
bits leftover from a previous deflate stream when appending to it. As such,
|
||||
this function can only be used for raw deflate, and must be used before the
|
||||
first deflate() call after a deflateInit2() or deflateReset(). bits must be
|
||||
less than or equal to 16, and that many of the least significant bits of
|
||||
value will be inserted in the output.
|
||||
|
||||
deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
|
||||
stream state was inconsistent.
|
||||
*/
|
||||
|
||||
/*
|
||||
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
|
||||
int windowBits));
|
||||
|
||||
|
|
@ -538,11 +628,30 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
|
|||
The windowBits parameter is the base two logarithm of the maximum window
|
||||
size (the size of the history buffer). It should be in the range 8..15 for
|
||||
this version of the library. The default value is 15 if inflateInit is used
|
||||
instead. If a compressed stream with a larger window size is given as
|
||||
input, inflate() will return with the error code Z_DATA_ERROR instead of
|
||||
trying to allocate a larger window.
|
||||
instead. windowBits must be greater than or equal to the windowBits value
|
||||
provided to deflateInit2() while compressing, or it must be equal to 15 if
|
||||
deflateInit2() was not used. If a compressed stream with a larger window
|
||||
size is given as input, inflate() will return with the error code
|
||||
Z_DATA_ERROR instead of trying to allocate a larger window.
|
||||
|
||||
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
||||
windowBits can also be -8..-15 for raw inflate. In this case, -windowBits
|
||||
determines the window size. inflate() will then process raw deflate data,
|
||||
not looking for a zlib or gzip header, not generating a check value, and not
|
||||
looking for any check values for comparison at the end of the stream. This
|
||||
is for use with other formats that use the deflate compressed data format
|
||||
such as zip. Those formats provide their own check values. If a custom
|
||||
format is developed using the raw deflate format for compressed data, it is
|
||||
recommended that a check value such as an adler32 or a crc32 be applied to
|
||||
the uncompressed data as is done in the zlib, gzip, and zip formats. For
|
||||
most applications, the zlib format should be used as is. Note that comments
|
||||
above on the use in deflateInit2() applies to the magnitude of windowBits.
|
||||
|
||||
windowBits can also be greater than 15 for optional gzip decoding. Add
|
||||
32 to windowBits to enable zlib and gzip decoding with automatic header
|
||||
detection, or add 16 to decode only the gzip format (the zlib format will
|
||||
return a Z_DATA_ERROR).
|
||||
|
||||
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
||||
memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
|
||||
memLevel). msg is set to null if there is no error message. inflateInit2
|
||||
does not perform any decompression apart from reading the zlib header if
|
||||
|
|
@ -557,20 +666,20 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
|
|||
Initializes the decompression dictionary from the given uncompressed byte
|
||||
sequence. This function must be called immediately after a call of inflate
|
||||
if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
|
||||
can be determined from the Adler32 value returned by this call of
|
||||
can be determined from the adler32 value returned by this call of
|
||||
inflate. The compressor and decompressor must use exactly the same
|
||||
dictionary (see deflateSetDictionary).
|
||||
|
||||
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
|
||||
parameter is invalid (such as NULL dictionary) or the stream state is
|
||||
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
|
||||
expected one (incorrect Adler32 value). inflateSetDictionary does not
|
||||
expected one (incorrect adler32 value). inflateSetDictionary does not
|
||||
perform any decompression: this will be done by subsequent calls of
|
||||
inflate().
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
|
||||
/*
|
||||
/*
|
||||
Skips invalid compressed data until a full flush point (see above the
|
||||
description of deflate with Z_FULL_FLUSH) can be found, or until all
|
||||
available input is skipped. No output is provided.
|
||||
|
|
@ -584,6 +693,22 @@ ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
|
|||
until success or end of the input data.
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
|
||||
z_streamp source));
|
||||
/*
|
||||
Sets the destination stream as a complete copy of the source stream.
|
||||
|
||||
This function can be useful when randomly accessing a large stream. The
|
||||
first pass through the stream can periodically record the inflate state,
|
||||
allowing restarting inflate at those points when randomly accessing the
|
||||
stream.
|
||||
|
||||
inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
|
||||
(such as zalloc being NULL). msg is left unchanged in both source and
|
||||
destination.
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
|
||||
/*
|
||||
This function is equivalent to inflateEnd followed by inflateInit,
|
||||
|
|
@ -594,6 +719,149 @@ ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
|
|||
stream state was inconsistent (such as zalloc or state being NULL).
|
||||
*/
|
||||
|
||||
/*
|
||||
ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
|
||||
unsigned char FAR *window));
|
||||
|
||||
Initialize the internal stream state for decompression using inflateBack()
|
||||
calls. The fields zalloc, zfree and opaque in strm must be initialized
|
||||
before the call. If zalloc and zfree are Z_NULL, then the default library-
|
||||
derived memory allocation routines are used. windowBits is the base two
|
||||
logarithm of the window size, in the range 8..15. window is a caller
|
||||
supplied buffer of that size. Except for special applications where it is
|
||||
assured that deflate was used with small window sizes, windowBits must be 15
|
||||
and a 32K byte window must be supplied to be able to decompress general
|
||||
deflate streams.
|
||||
|
||||
See inflateBack() for the usage of these routines.
|
||||
|
||||
inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
|
||||
the paramaters are invalid, Z_MEM_ERROR if the internal state could not
|
||||
be allocated, or Z_VERSION_ERROR if the version of the library does not
|
||||
match the version of the header file.
|
||||
*/
|
||||
|
||||
typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
|
||||
typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
|
||||
|
||||
ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
|
||||
in_func in, void FAR *in_desc,
|
||||
out_func out, void FAR *out_desc));
|
||||
/*
|
||||
inflateBack() does a raw inflate with a single call using a call-back
|
||||
interface for input and output. This is more efficient than inflate() for
|
||||
file i/o applications in that it avoids copying between the output and the
|
||||
sliding window by simply making the window itself the output buffer. This
|
||||
function trusts the application to not change the output buffer passed by
|
||||
the output function, at least until inflateBack() returns.
|
||||
|
||||
inflateBackInit() must be called first to allocate the internal state
|
||||
and to initialize the state with the user-provided window buffer.
|
||||
inflateBack() may then be used multiple times to inflate a complete, raw
|
||||
deflate stream with each call. inflateBackEnd() is then called to free
|
||||
the allocated state.
|
||||
|
||||
A raw deflate stream is one with no zlib or gzip header or trailer.
|
||||
This routine would normally be used in a utility that reads zip or gzip
|
||||
files and writes out uncompressed files. The utility would decode the
|
||||
header and process the trailer on its own, hence this routine expects
|
||||
only the raw deflate stream to decompress. This is different from the
|
||||
normal behavior of inflate(), which expects either a zlib or gzip header and
|
||||
trailer around the deflate stream.
|
||||
|
||||
inflateBack() uses two subroutines supplied by the caller that are then
|
||||
called by inflateBack() for input and output. inflateBack() calls those
|
||||
routines until it reads a complete deflate stream and writes out all of the
|
||||
uncompressed data, or until it encounters an error. The function's
|
||||
parameters and return types are defined above in the in_func and out_func
|
||||
typedefs. inflateBack() will call in(in_desc, &buf) which should return the
|
||||
number of bytes of provided input, and a pointer to that input in buf. If
|
||||
there is no input available, in() must return zero--buf is ignored in that
|
||||
case--and inflateBack() will return a buffer error. inflateBack() will call
|
||||
out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out()
|
||||
should return zero on success, or non-zero on failure. If out() returns
|
||||
non-zero, inflateBack() will return with an error. Neither in() nor out()
|
||||
are permitted to change the contents of the window provided to
|
||||
inflateBackInit(), which is also the buffer that out() uses to write from.
|
||||
The length written by out() will be at most the window size. Any non-zero
|
||||
amount of input may be provided by in().
|
||||
|
||||
For convenience, inflateBack() can be provided input on the first call by
|
||||
setting strm->next_in and strm->avail_in. If that input is exhausted, then
|
||||
in() will be called. Therefore strm->next_in must be initialized before
|
||||
calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called
|
||||
immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in
|
||||
must also be initialized, and then if strm->avail_in is not zero, input will
|
||||
initially be taken from strm->next_in[0 .. strm->avail_in - 1].
|
||||
|
||||
The in_desc and out_desc parameters of inflateBack() is passed as the
|
||||
first parameter of in() and out() respectively when they are called. These
|
||||
descriptors can be optionally used to pass any information that the caller-
|
||||
supplied in() and out() functions need to do their job.
|
||||
|
||||
On return, inflateBack() will set strm->next_in and strm->avail_in to
|
||||
pass back any unused input that was provided by the last in() call. The
|
||||
return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
|
||||
if in() or out() returned an error, Z_DATA_ERROR if there was a format
|
||||
error in the deflate stream (in which case strm->msg is set to indicate the
|
||||
nature of the error), or Z_STREAM_ERROR if the stream was not properly
|
||||
initialized. In the case of Z_BUF_ERROR, an input or output error can be
|
||||
distinguished using strm->next_in which will be Z_NULL only if in() returned
|
||||
an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to
|
||||
out() returning non-zero. (in() will always be called before out(), so
|
||||
strm->next_in is assured to be defined if out() returns non-zero.) Note
|
||||
that inflateBack() cannot return Z_OK.
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT inflateBackEnd OF((z_stream FAR *strm));
|
||||
/*
|
||||
All memory allocated by inflateBackInit() is freed.
|
||||
|
||||
inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
|
||||
state was inconsistent.
|
||||
*/
|
||||
|
||||
ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
|
||||
/* Return flags indicating compile-time options.
|
||||
|
||||
Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other:
|
||||
1.0: size of uInt
|
||||
3.2: size of uLong
|
||||
5.4: size of voidpf (pointer)
|
||||
7.6: size of z_off_t
|
||||
|
||||
Compiler, assembler, and debug options:
|
||||
8: DEBUG
|
||||
9: ASMV or ASMINF -- use ASM code
|
||||
10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
|
||||
11: 0 (reserved)
|
||||
|
||||
One-time table building (smaller code, but not thread-safe if true):
|
||||
12: BUILDFIXED -- build static block decoding tables when needed
|
||||
13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed
|
||||
14,15: 0 (reserved)
|
||||
|
||||
Library content (indicates missing functionality):
|
||||
16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking
|
||||
deflate code when not needed)
|
||||
17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect
|
||||
and decode gzip streams (to avoid linking crc code)
|
||||
18-19: 0 (reserved)
|
||||
|
||||
Operation variations (changes in library functionality):
|
||||
20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate
|
||||
21: FASTEST -- deflate algorithm with only one, lowest compression level
|
||||
22,23: 0 (reserved)
|
||||
|
||||
The sprintf variant used by gzprintf (zero is best):
|
||||
24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format
|
||||
25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure!
|
||||
26: 0 = returns value, 1 = void -- 1 means inferred string length returned
|
||||
|
||||
Remainder:
|
||||
27-31: 0 (reserved)
|
||||
*/
|
||||
|
||||
|
||||
/* utility functions */
|
||||
|
||||
|
|
@ -610,8 +878,8 @@ ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
|
|||
/*
|
||||
Compresses the source buffer into the destination buffer. sourceLen is
|
||||
the byte length of the source buffer. Upon entry, destLen is the total
|
||||
size of the destination buffer, which must be at least 0.1% larger than
|
||||
sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
|
||||
size of the destination buffer, which must be at least the value returned
|
||||
by compressBound(sourceLen). Upon exit, destLen is the actual size of the
|
||||
compressed buffer.
|
||||
This function can be used to compress a whole file at once if the
|
||||
input file is mmap'ed.
|
||||
|
|
@ -627,14 +895,22 @@ ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
|
|||
Compresses the source buffer into the destination buffer. The level
|
||||
parameter has the same meaning as in deflateInit. sourceLen is the byte
|
||||
length of the source buffer. Upon entry, destLen is the total size of the
|
||||
destination buffer, which must be at least 0.1% larger than sourceLen plus
|
||||
12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
|
||||
destination buffer, which must be at least the value returned by
|
||||
compressBound(sourceLen). Upon exit, destLen is the actual size of the
|
||||
compressed buffer.
|
||||
|
||||
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
||||
memory, Z_BUF_ERROR if there was not enough room in the output buffer,
|
||||
Z_STREAM_ERROR if the level parameter is invalid.
|
||||
*/
|
||||
|
||||
ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
|
||||
/*
|
||||
compressBound() returns an upper bound on the compressed size after
|
||||
compress() or compress2() on sourceLen bytes. It would be used before
|
||||
a compress() or compress2() call to allocate the destination buffer.
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
|
||||
const Bytef *source, uLong sourceLen));
|
||||
/*
|
||||
|
|
@ -650,7 +926,7 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
|
|||
|
||||
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory, Z_BUF_ERROR if there was not enough room in the output
|
||||
buffer, or Z_DATA_ERROR if the input data was corrupted.
|
||||
buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.
|
||||
*/
|
||||
|
||||
|
||||
|
|
@ -661,8 +937,9 @@ ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
|
|||
Opens a gzip (.gz) file for reading or writing. The mode parameter
|
||||
is as in fopen ("rb" or "wb") but can also include a compression level
|
||||
("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
|
||||
Huffman only compression as in "wb1h". (See the description
|
||||
of deflateInit2 for more information about the strategy parameter.)
|
||||
Huffman only compression as in "wb1h", or 'R' for run-length encoding
|
||||
as in "wb1R". (See the description of deflateInit2 for more information
|
||||
about the strategy parameter.)
|
||||
|
||||
gzopen can be used to read a file which is not in gzip format; in this
|
||||
case gzread will directly read from the file without decompression.
|
||||
|
|
@ -701,8 +978,8 @@ ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
|
|||
gzread returns the number of uncompressed bytes actually read (0 for
|
||||
end of file, -1 for error). */
|
||||
|
||||
ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
|
||||
const voidp buf, unsigned len));
|
||||
ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
|
||||
voidpc buf, unsigned len));
|
||||
/*
|
||||
Writes the given number of uncompressed bytes into the compressed file.
|
||||
gzwrite returns the number of uncompressed bytes actually written
|
||||
|
|
@ -713,7 +990,13 @@ ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
|
|||
/*
|
||||
Converts, formats, and writes the args to the compressed file under
|
||||
control of the format string, as in fprintf. gzprintf returns the number of
|
||||
uncompressed bytes actually written (0 in case of error).
|
||||
uncompressed bytes actually written (0 in case of error). The number of
|
||||
uncompressed bytes written is limited to 4095. The caller should assure that
|
||||
this limit is not exceeded. If it is exceeded, then gzprintf() will return
|
||||
return an error (0) with nothing written. In this case, there may also be a
|
||||
buffer overflow with unpredictable consequences, which is possible only if
|
||||
zlib was compiled with the insecure functions sprintf() or vsprintf()
|
||||
because the secure snprintf() or vsnprintf() functions were not available.
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
|
||||
|
|
@ -744,6 +1027,16 @@ ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
|
|||
or -1 in case of end of file or error.
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
|
||||
/*
|
||||
Push one character back onto the stream to be read again later.
|
||||
Only one character of push-back is allowed. gzungetc() returns the
|
||||
character pushed, or -1 on failure. gzungetc() will fail if a
|
||||
character has been pushed but not read yet, or if c is -1. The pushed
|
||||
character will be discarded if the stream is repositioned with gzseek()
|
||||
or gzrewind().
|
||||
*/
|
||||
|
||||
ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
|
||||
/*
|
||||
Flushes all pending output into the compressed file. The parameter
|
||||
|
|
@ -755,8 +1048,8 @@ ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
|
|||
*/
|
||||
|
||||
ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
|
||||
z_off_t offset, int whence));
|
||||
/*
|
||||
z_off_t offset, int whence));
|
||||
/*
|
||||
Sets the starting position for the next gzread or gzwrite on the
|
||||
given compressed file. The offset represents a number of bytes in the
|
||||
uncompressed data stream. The whence parameter is defined as in lseek(2);
|
||||
|
|
@ -810,6 +1103,13 @@ ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
|
|||
to get the exact error code.
|
||||
*/
|
||||
|
||||
ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
|
||||
/*
|
||||
Clears the error and end-of-file flags for file. This is analogous to the
|
||||
clearerr() function in stdio. This is useful for continuing to read a gzip
|
||||
file that is being written concurrently.
|
||||
*/
|
||||
|
||||
/* checksum functions */
|
||||
|
||||
/*
|
||||
|
|
@ -867,6 +1167,10 @@ ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
|
|||
int stream_size));
|
||||
ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
|
||||
const char *version, int stream_size));
|
||||
ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits,
|
||||
unsigned char FAR *window,
|
||||
const char *version,
|
||||
int stream_size));
|
||||
#define deflateInit(strm, level) \
|
||||
deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
|
||||
#define inflateInit(strm) \
|
||||
|
|
@ -876,9 +1180,12 @@ ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
|
|||
(strategy), ZLIB_VERSION, sizeof(z_stream))
|
||||
#define inflateInit2(strm, windowBits) \
|
||||
inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
|
||||
#define inflateBackInit(strm, windowBits, window) \
|
||||
inflateBackInit_((strm), (windowBits), (window), \
|
||||
ZLIB_VERSION, sizeof(z_stream))
|
||||
|
||||
|
||||
#if !defined(_Z_UTIL_H) && !defined(NO_DUMMY_DECL)
|
||||
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
|
||||
struct internal_state {int dummy;}; /* hack for buggy compilers */
|
||||
#endif
|
||||
|
||||
|
|
@ -890,4 +1197,4 @@ ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
|
|||
}
|
||||
#endif
|
||||
|
||||
#endif /* _ZLIB_H */
|
||||
#endif /* ZLIB_H */
|
||||
|
|
|
|||
116
lib/libz/zutil.c
116
lib/libz/zutil.c
|
|
@ -1,19 +1,21 @@
|
|||
/* zutil.c -- target dependent utility functions for the compression library
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#include "zutil.h"
|
||||
|
||||
#ifndef NO_DUMMY_DECL
|
||||
struct internal_state {int dummy;}; /* for buggy compilers */
|
||||
#endif
|
||||
|
||||
#ifndef STDC
|
||||
extern void exit OF((int));
|
||||
#endif
|
||||
|
||||
const char *z_errmsg[10] = {
|
||||
const char * const z_errmsg[10] = {
|
||||
"need dictionary", /* Z_NEED_DICT 2 */
|
||||
"stream end", /* Z_STREAM_END 1 */
|
||||
"", /* Z_OK 0 */
|
||||
|
|
@ -31,6 +33,89 @@ const char * ZEXPORT zlibVersion()
|
|||
return ZLIB_VERSION;
|
||||
}
|
||||
|
||||
uLong ZEXPORT zlibCompileFlags()
|
||||
{
|
||||
uLong flags;
|
||||
|
||||
flags = 0;
|
||||
switch (sizeof(uInt)) {
|
||||
case 2: break;
|
||||
case 4: flags += 1; break;
|
||||
case 8: flags += 2; break;
|
||||
default: flags += 3;
|
||||
}
|
||||
switch (sizeof(uLong)) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 2; break;
|
||||
case 8: flags += 2 << 2; break;
|
||||
default: flags += 3 << 2;
|
||||
}
|
||||
switch (sizeof(voidpf)) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 4; break;
|
||||
case 8: flags += 2 << 4; break;
|
||||
default: flags += 3 << 4;
|
||||
}
|
||||
switch (sizeof(z_off_t)) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 6; break;
|
||||
case 8: flags += 2 << 6; break;
|
||||
default: flags += 3 << 6;
|
||||
}
|
||||
#ifdef DEBUG
|
||||
flags += 1 << 8;
|
||||
#endif
|
||||
#if defined(ASMV) || defined(ASMINF)
|
||||
flags += 1 << 9;
|
||||
#endif
|
||||
#ifdef ZLIB_WINAPI
|
||||
flags += 1 << 10;
|
||||
#endif
|
||||
#ifdef BUILDFIXED
|
||||
flags += 1 << 12;
|
||||
#endif
|
||||
#ifdef DYNAMIC_CRC_TABLE
|
||||
flags += 1 << 13;
|
||||
#endif
|
||||
#ifdef NO_GZCOMPRESS
|
||||
flags += 1 << 16;
|
||||
#endif
|
||||
#ifdef NO_GZIP
|
||||
flags += 1 << 17;
|
||||
#endif
|
||||
#ifdef PKZIP_BUG_WORKAROUND
|
||||
flags += 1 << 20;
|
||||
#endif
|
||||
#ifdef FASTEST
|
||||
flags += 1 << 21;
|
||||
#endif
|
||||
#ifdef STDC
|
||||
# ifdef NO_vsnprintf
|
||||
flags += 1 << 25;
|
||||
# ifdef HAS_vsprintf_void
|
||||
flags += 1 << 26;
|
||||
# endif
|
||||
# else
|
||||
# ifdef HAS_vsnprintf_void
|
||||
flags += 1 << 26;
|
||||
# endif
|
||||
# endif
|
||||
#else
|
||||
flags += 1 << 24;
|
||||
# ifdef NO_snprintf
|
||||
flags += 1 << 25;
|
||||
# ifdef HAS_sprintf_void
|
||||
flags += 1 << 26;
|
||||
# endif
|
||||
# else
|
||||
# ifdef HAS_snprintf_void
|
||||
flags += 1 << 26;
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
return flags;
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
|
||||
# ifndef verbose
|
||||
|
|
@ -55,6 +140,10 @@ const char * ZEXPORT zError(err)
|
|||
return ERR_MSG(err);
|
||||
}
|
||||
|
||||
#if defined(_WIN32_WCE)
|
||||
/* does not exist on WCE */
|
||||
int errno = 0;
|
||||
#endif
|
||||
|
||||
#ifndef HAVE_MEMCPY
|
||||
|
||||
|
|
@ -93,11 +182,12 @@ void zmemzero(dest, len)
|
|||
}
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef SYS16BIT
|
||||
|
||||
#ifdef __TURBOC__
|
||||
#if (defined( __BORLANDC__) || !defined(SMALL_MEDIUM)) && !defined(__32BIT__)
|
||||
/* Small and medium model in Turbo C are for now limited to near allocation
|
||||
* with reduced MAX_WBITS and MAX_MEM_LEVEL
|
||||
*/
|
||||
/* Turbo C in 16-bit mode */
|
||||
|
||||
# define MY_ZCALLOC
|
||||
|
||||
/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
|
||||
|
|
@ -169,11 +259,11 @@ void zcfree (voidpf opaque, voidpf ptr)
|
|||
ptr = opaque; /* just to make some compilers happy */
|
||||
Assert(0, "zcfree: ptr not found");
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* __TURBOC__ */
|
||||
|
||||
|
||||
#if defined(M_I86) && !defined(__32BIT__)
|
||||
#ifdef M_I86
|
||||
/* Microsoft C in 16-bit mode */
|
||||
|
||||
# define MY_ZCALLOC
|
||||
|
|
@ -195,12 +285,15 @@ void zcfree (voidpf opaque, voidpf ptr)
|
|||
_hfree(ptr);
|
||||
}
|
||||
|
||||
#endif /* MSC */
|
||||
#endif /* M_I86 */
|
||||
|
||||
#endif /* SYS16BIT */
|
||||
|
||||
|
||||
#ifndef MY_ZCALLOC /* Any system without a special alloc function */
|
||||
|
||||
#ifndef STDC
|
||||
extern voidp malloc OF((uInt size));
|
||||
extern voidp calloc OF((uInt items, uInt size));
|
||||
extern void free OF((voidpf ptr));
|
||||
#endif
|
||||
|
|
@ -211,7 +304,8 @@ voidpf zcalloc (opaque, items, size)
|
|||
unsigned size;
|
||||
{
|
||||
if (opaque) items += size - size; /* make compiler happy */
|
||||
return (voidpf)calloc(items, size);
|
||||
return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
|
||||
(voidpf)calloc(items, size);
|
||||
}
|
||||
|
||||
void zcfree (opaque, ptr)
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/* zutil.h -- internal interface and configuration of the compression library
|
||||
* Copyright (C) 1995-2002 Jean-loup Gailly.
|
||||
* Copyright (C) 1995-2003 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
|
|
@ -10,9 +10,10 @@
|
|||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#ifndef _Z_UTIL_H
|
||||
#define _Z_UTIL_H
|
||||
#ifndef ZUTIL_H
|
||||
#define ZUTIL_H
|
||||
|
||||
#define ZLIB_INTERNAL
|
||||
#include "zlib.h"
|
||||
|
||||
#ifdef STDC
|
||||
|
|
@ -37,7 +38,7 @@ typedef unsigned short ush;
|
|||
typedef ush FAR ushf;
|
||||
typedef unsigned long ulg;
|
||||
|
||||
extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
|
||||
extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
|
||||
/* (size given to avoid silly warnings with Visual C++) */
|
||||
|
||||
#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
|
||||
|
|
@ -73,7 +74,7 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
|
|||
|
||||
/* target dependencies */
|
||||
|
||||
#ifdef MSDOS
|
||||
#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
|
||||
# define OS_CODE 0x00
|
||||
# if defined(__TURBOC__) || defined(__BORLANDC__)
|
||||
# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
|
||||
|
|
@ -81,19 +82,15 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
|
|||
void _Cdecl farfree( void *block );
|
||||
void *_Cdecl farmalloc( unsigned long nbytes );
|
||||
# else
|
||||
# include <alloc.h>
|
||||
# include <alloc.h>
|
||||
# endif
|
||||
# else /* MSC or DJGPP */
|
||||
# include <malloc.h>
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef OS2
|
||||
# define OS_CODE 0x06
|
||||
#endif
|
||||
|
||||
#ifdef WIN32 /* Window 95 & Windows NT */
|
||||
# define OS_CODE 0x0b
|
||||
#ifdef AMIGA
|
||||
# define OS_CODE 0x01
|
||||
#endif
|
||||
|
||||
#if defined(VAXC) || defined(VMS)
|
||||
|
|
@ -102,14 +99,14 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
|
|||
fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
|
||||
#endif
|
||||
|
||||
#ifdef AMIGA
|
||||
# define OS_CODE 0x01
|
||||
#endif
|
||||
|
||||
#if defined(ATARI) || defined(atarist)
|
||||
# define OS_CODE 0x05
|
||||
#endif
|
||||
|
||||
#ifdef OS2
|
||||
# define OS_CODE 0x06
|
||||
#endif
|
||||
|
||||
#if defined(MACOS) || defined(TARGET_OS_MAC)
|
||||
# define OS_CODE 0x07
|
||||
# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
|
||||
|
|
@ -121,24 +118,37 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
|
|||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef __50SERIES /* Prime/PRIMOS */
|
||||
# define OS_CODE 0x0F
|
||||
#endif
|
||||
|
||||
#ifdef TOPS20
|
||||
# define OS_CODE 0x0a
|
||||
#endif
|
||||
|
||||
#ifdef WIN32
|
||||
# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
|
||||
# define OS_CODE 0x0b
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef __50SERIES /* Prime/PRIMOS */
|
||||
# define OS_CODE 0x0f
|
||||
#endif
|
||||
|
||||
#if defined(_BEOS_) || defined(RISCOS)
|
||||
# define fdopen(fd,mode) NULL /* No fdopen() */
|
||||
#endif
|
||||
|
||||
#if (defined(_MSC_VER) && (_MSC_VER > 600))
|
||||
# define fdopen(fd,type) _fdopen(fd,type)
|
||||
# if defined(_WIN32_WCE)
|
||||
# define fdopen(fd,mode) NULL /* No fdopen() */
|
||||
# ifndef _PTRDIFF_T_DEFINED
|
||||
typedef int ptrdiff_t;
|
||||
# define _PTRDIFF_T_DEFINED
|
||||
# endif
|
||||
# else
|
||||
# define fdopen(fd,type) _fdopen(fd,type)
|
||||
# endif
|
||||
#endif
|
||||
|
||||
|
||||
/* Common defaults */
|
||||
/* common defaults */
|
||||
|
||||
#ifndef OS_CODE
|
||||
# define OS_CODE 0x03 /* assume Unix */
|
||||
|
|
@ -150,6 +160,36 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
|
|||
|
||||
/* functions */
|
||||
|
||||
#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
|
||||
# ifndef HAVE_VSNPRINTF
|
||||
# define HAVE_VSNPRINTF
|
||||
# endif
|
||||
#endif
|
||||
#if defined(__CYGWIN__)
|
||||
# ifndef HAVE_VSNPRINTF
|
||||
# define HAVE_VSNPRINTF
|
||||
# endif
|
||||
#endif
|
||||
#ifndef HAVE_VSNPRINTF
|
||||
# ifdef MSDOS
|
||||
/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
|
||||
but for now we just assume it doesn't. */
|
||||
# define NO_vsnprintf
|
||||
# endif
|
||||
# ifdef __TURBOC__
|
||||
# define NO_vsnprintf
|
||||
# endif
|
||||
# ifdef WIN32
|
||||
/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
|
||||
# if !defined(vsnprintf) && !defined(NO_vsnprintf)
|
||||
# define vsnprintf _vsnprintf
|
||||
# endif
|
||||
# endif
|
||||
# ifdef __SASC
|
||||
# define NO_vsnprintf
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_STRERROR
|
||||
extern char *strerror OF((int));
|
||||
# define zstrerror(errnum) strerror(errnum)
|
||||
|
|
@ -207,8 +247,6 @@ extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
|
|||
#endif
|
||||
|
||||
|
||||
typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
|
||||
uInt len));
|
||||
voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
|
||||
void zcfree OF((voidpf opaque, voidpf ptr));
|
||||
|
||||
|
|
@ -217,4 +255,4 @@ void zcfree OF((voidpf opaque, voidpf ptr));
|
|||
#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
|
||||
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
|
||||
|
||||
#endif /* _Z_UTIL_H */
|
||||
#endif /* ZUTIL_H */
|
||||
|
|
|
|||
Loading…
Reference in a new issue