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Add obstack.[ch] from EGLIBC 2.10
Signed-off-by: Fredrik Kuivinen <frekui@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
parent
cee426811c
commit
e831171d67
2
Makefile
2
Makefile
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@ -514,6 +514,7 @@ LIB_H += commit.h
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LIB_H += compat/bswap.h
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LIB_H += compat/cygwin.h
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LIB_H += compat/mingw.h
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LIB_H += compat/obstack.h
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LIB_H += compat/win32/pthread.h
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LIB_H += compat/win32/syslog.h
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LIB_H += compat/win32/sys/poll.h
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@ -593,6 +594,7 @@ LIB_OBJS += cache-tree.o
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LIB_OBJS += color.o
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LIB_OBJS += combine-diff.o
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LIB_OBJS += commit.o
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LIB_OBJS += compat/obstack.o
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LIB_OBJS += config.o
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LIB_OBJS += connect.o
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LIB_OBJS += convert.o
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441
compat/obstack.c
Normal file
441
compat/obstack.c
Normal file
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@ -0,0 +1,441 @@
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/* obstack.c - subroutines used implicitly by object stack macros
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Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998,
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1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifdef _LIBC
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# include <obstack.h>
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# include <shlib-compat.h>
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#else
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# include "obstack.h"
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#endif
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/* NOTE BEFORE MODIFYING THIS FILE: This version number must be
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incremented whenever callers compiled using an old obstack.h can no
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longer properly call the functions in this obstack.c. */
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#define OBSTACK_INTERFACE_VERSION 1
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/* Comment out all this code if we are using the GNU C Library, and are not
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actually compiling the library itself, and the installed library
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supports the same library interface we do. This code is part of the GNU
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C Library, but also included in many other GNU distributions. Compiling
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and linking in this code is a waste when using the GNU C library
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(especially if it is a shared library). Rather than having every GNU
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program understand `configure --with-gnu-libc' and omit the object
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files, it is simpler to just do this in the source for each such file. */
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#include <stdio.h> /* Random thing to get __GNU_LIBRARY__. */
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#if !defined _LIBC && defined __GNU_LIBRARY__ && __GNU_LIBRARY__ > 1
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# include <gnu-versions.h>
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# if _GNU_OBSTACK_INTERFACE_VERSION == OBSTACK_INTERFACE_VERSION
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# define ELIDE_CODE
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# endif
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#endif
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#include <stddef.h>
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#ifndef ELIDE_CODE
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# if HAVE_INTTYPES_H
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# include <inttypes.h>
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# endif
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# if HAVE_STDINT_H || defined _LIBC
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# include <stdint.h>
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# endif
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/* Determine default alignment. */
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union fooround
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{
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uintmax_t i;
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long double d;
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void *p;
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};
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struct fooalign
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{
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char c;
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union fooround u;
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};
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/* If malloc were really smart, it would round addresses to DEFAULT_ALIGNMENT.
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But in fact it might be less smart and round addresses to as much as
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DEFAULT_ROUNDING. So we prepare for it to do that. */
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enum
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{
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DEFAULT_ALIGNMENT = offsetof (struct fooalign, u),
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DEFAULT_ROUNDING = sizeof (union fooround)
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};
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/* When we copy a long block of data, this is the unit to do it with.
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On some machines, copying successive ints does not work;
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in such a case, redefine COPYING_UNIT to `long' (if that works)
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or `char' as a last resort. */
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# ifndef COPYING_UNIT
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# define COPYING_UNIT int
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# endif
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/* The functions allocating more room by calling `obstack_chunk_alloc'
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jump to the handler pointed to by `obstack_alloc_failed_handler'.
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This can be set to a user defined function which should either
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abort gracefully or use longjump - but shouldn't return. This
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variable by default points to the internal function
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`print_and_abort'. */
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static void print_and_abort (void);
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void (*obstack_alloc_failed_handler) (void) = print_and_abort;
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/* Exit value used when `print_and_abort' is used. */
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# include <stdlib.h>
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# ifdef _LIBC
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int obstack_exit_failure = EXIT_FAILURE;
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# else
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# include "exitfail.h"
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# define obstack_exit_failure exit_failure
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# endif
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# ifdef _LIBC
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# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_4)
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/* A looong time ago (before 1994, anyway; we're not sure) this global variable
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was used by non-GNU-C macros to avoid multiple evaluation. The GNU C
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library still exports it because somebody might use it. */
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struct obstack *_obstack_compat;
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compat_symbol (libc, _obstack_compat, _obstack, GLIBC_2_0);
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# endif
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# endif
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/* Define a macro that either calls functions with the traditional malloc/free
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calling interface, or calls functions with the mmalloc/mfree interface
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(that adds an extra first argument), based on the state of use_extra_arg.
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For free, do not use ?:, since some compilers, like the MIPS compilers,
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do not allow (expr) ? void : void. */
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# define CALL_CHUNKFUN(h, size) \
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(((h) -> use_extra_arg) \
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? (*(h)->chunkfun) ((h)->extra_arg, (size)) \
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: (*(struct _obstack_chunk *(*) (long)) (h)->chunkfun) ((size)))
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# define CALL_FREEFUN(h, old_chunk) \
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do { \
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if ((h) -> use_extra_arg) \
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(*(h)->freefun) ((h)->extra_arg, (old_chunk)); \
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else \
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(*(void (*) (void *)) (h)->freefun) ((old_chunk)); \
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} while (0)
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/* Initialize an obstack H for use. Specify chunk size SIZE (0 means default).
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Objects start on multiples of ALIGNMENT (0 means use default).
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CHUNKFUN is the function to use to allocate chunks,
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and FREEFUN the function to free them.
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Return nonzero if successful, calls obstack_alloc_failed_handler if
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allocation fails. */
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int
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_obstack_begin (struct obstack *h,
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int size, int alignment,
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void *(*chunkfun) (long),
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void (*freefun) (void *))
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{
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register struct _obstack_chunk *chunk; /* points to new chunk */
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if (alignment == 0)
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alignment = DEFAULT_ALIGNMENT;
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if (size == 0)
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/* Default size is what GNU malloc can fit in a 4096-byte block. */
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{
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/* 12 is sizeof (mhead) and 4 is EXTRA from GNU malloc.
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Use the values for range checking, because if range checking is off,
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the extra bytes won't be missed terribly, but if range checking is on
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and we used a larger request, a whole extra 4096 bytes would be
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allocated.
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These number are irrelevant to the new GNU malloc. I suspect it is
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less sensitive to the size of the request. */
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int extra = ((((12 + DEFAULT_ROUNDING - 1) & ~(DEFAULT_ROUNDING - 1))
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+ 4 + DEFAULT_ROUNDING - 1)
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& ~(DEFAULT_ROUNDING - 1));
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size = 4096 - extra;
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}
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h->chunkfun = (struct _obstack_chunk * (*)(void *, long)) chunkfun;
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h->freefun = (void (*) (void *, struct _obstack_chunk *)) freefun;
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h->chunk_size = size;
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h->alignment_mask = alignment - 1;
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h->use_extra_arg = 0;
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chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size);
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if (!chunk)
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(*obstack_alloc_failed_handler) ();
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h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents,
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alignment - 1);
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h->chunk_limit = chunk->limit
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= (char *) chunk + h->chunk_size;
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chunk->prev = 0;
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/* The initial chunk now contains no empty object. */
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h->maybe_empty_object = 0;
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h->alloc_failed = 0;
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return 1;
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}
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int
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_obstack_begin_1 (struct obstack *h, int size, int alignment,
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void *(*chunkfun) (void *, long),
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void (*freefun) (void *, void *),
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void *arg)
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{
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register struct _obstack_chunk *chunk; /* points to new chunk */
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if (alignment == 0)
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alignment = DEFAULT_ALIGNMENT;
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if (size == 0)
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/* Default size is what GNU malloc can fit in a 4096-byte block. */
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{
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/* 12 is sizeof (mhead) and 4 is EXTRA from GNU malloc.
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Use the values for range checking, because if range checking is off,
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the extra bytes won't be missed terribly, but if range checking is on
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and we used a larger request, a whole extra 4096 bytes would be
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allocated.
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These number are irrelevant to the new GNU malloc. I suspect it is
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less sensitive to the size of the request. */
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int extra = ((((12 + DEFAULT_ROUNDING - 1) & ~(DEFAULT_ROUNDING - 1))
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+ 4 + DEFAULT_ROUNDING - 1)
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& ~(DEFAULT_ROUNDING - 1));
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size = 4096 - extra;
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}
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h->chunkfun = (struct _obstack_chunk * (*)(void *,long)) chunkfun;
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h->freefun = (void (*) (void *, struct _obstack_chunk *)) freefun;
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h->chunk_size = size;
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h->alignment_mask = alignment - 1;
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h->extra_arg = arg;
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h->use_extra_arg = 1;
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chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size);
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if (!chunk)
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(*obstack_alloc_failed_handler) ();
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h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents,
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alignment - 1);
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h->chunk_limit = chunk->limit
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= (char *) chunk + h->chunk_size;
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chunk->prev = 0;
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/* The initial chunk now contains no empty object. */
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h->maybe_empty_object = 0;
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h->alloc_failed = 0;
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return 1;
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}
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/* Allocate a new current chunk for the obstack *H
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on the assumption that LENGTH bytes need to be added
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to the current object, or a new object of length LENGTH allocated.
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Copies any partial object from the end of the old chunk
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to the beginning of the new one. */
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void
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_obstack_newchunk (struct obstack *h, int length)
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{
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register struct _obstack_chunk *old_chunk = h->chunk;
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register struct _obstack_chunk *new_chunk;
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register long new_size;
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register long obj_size = h->next_free - h->object_base;
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register long i;
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long already;
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char *object_base;
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/* Compute size for new chunk. */
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new_size = (obj_size + length) + (obj_size >> 3) + h->alignment_mask + 100;
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if (new_size < h->chunk_size)
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new_size = h->chunk_size;
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/* Allocate and initialize the new chunk. */
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new_chunk = CALL_CHUNKFUN (h, new_size);
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if (!new_chunk)
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(*obstack_alloc_failed_handler) ();
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h->chunk = new_chunk;
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new_chunk->prev = old_chunk;
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new_chunk->limit = h->chunk_limit = (char *) new_chunk + new_size;
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/* Compute an aligned object_base in the new chunk */
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object_base =
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__PTR_ALIGN ((char *) new_chunk, new_chunk->contents, h->alignment_mask);
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/* Move the existing object to the new chunk.
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Word at a time is fast and is safe if the object
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is sufficiently aligned. */
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if (h->alignment_mask + 1 >= DEFAULT_ALIGNMENT)
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{
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for (i = obj_size / sizeof (COPYING_UNIT) - 1;
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i >= 0; i--)
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((COPYING_UNIT *)object_base)[i]
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= ((COPYING_UNIT *)h->object_base)[i];
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/* We used to copy the odd few remaining bytes as one extra COPYING_UNIT,
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but that can cross a page boundary on a machine
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which does not do strict alignment for COPYING_UNITS. */
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already = obj_size / sizeof (COPYING_UNIT) * sizeof (COPYING_UNIT);
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}
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else
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already = 0;
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/* Copy remaining bytes one by one. */
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for (i = already; i < obj_size; i++)
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object_base[i] = h->object_base[i];
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/* If the object just copied was the only data in OLD_CHUNK,
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free that chunk and remove it from the chain.
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But not if that chunk might contain an empty object. */
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if (! h->maybe_empty_object
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&& (h->object_base
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== __PTR_ALIGN ((char *) old_chunk, old_chunk->contents,
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h->alignment_mask)))
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{
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new_chunk->prev = old_chunk->prev;
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CALL_FREEFUN (h, old_chunk);
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}
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h->object_base = object_base;
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h->next_free = h->object_base + obj_size;
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/* The new chunk certainly contains no empty object yet. */
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h->maybe_empty_object = 0;
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}
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# ifdef _LIBC
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libc_hidden_def (_obstack_newchunk)
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# endif
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/* Return nonzero if object OBJ has been allocated from obstack H.
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This is here for debugging.
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If you use it in a program, you are probably losing. */
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/* Suppress -Wmissing-prototypes warning. We don't want to declare this in
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obstack.h because it is just for debugging. */
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int _obstack_allocated_p (struct obstack *h, void *obj);
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int
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_obstack_allocated_p (struct obstack *h, void *obj)
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{
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register struct _obstack_chunk *lp; /* below addr of any objects in this chunk */
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register struct _obstack_chunk *plp; /* point to previous chunk if any */
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lp = (h)->chunk;
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/* We use >= rather than > since the object cannot be exactly at
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the beginning of the chunk but might be an empty object exactly
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at the end of an adjacent chunk. */
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while (lp != 0 && ((void *) lp >= obj || (void *) (lp)->limit < obj))
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{
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plp = lp->prev;
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lp = plp;
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}
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return lp != 0;
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}
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/* Free objects in obstack H, including OBJ and everything allocate
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more recently than OBJ. If OBJ is zero, free everything in H. */
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# undef obstack_free
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void
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obstack_free (struct obstack *h, void *obj)
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{
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register struct _obstack_chunk *lp; /* below addr of any objects in this chunk */
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register struct _obstack_chunk *plp; /* point to previous chunk if any */
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lp = h->chunk;
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/* We use >= because there cannot be an object at the beginning of a chunk.
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But there can be an empty object at that address
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at the end of another chunk. */
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while (lp != 0 && ((void *) lp >= obj || (void *) (lp)->limit < obj))
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{
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plp = lp->prev;
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CALL_FREEFUN (h, lp);
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lp = plp;
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/* If we switch chunks, we can't tell whether the new current
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chunk contains an empty object, so assume that it may. */
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h->maybe_empty_object = 1;
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}
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if (lp)
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{
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h->object_base = h->next_free = (char *) (obj);
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h->chunk_limit = lp->limit;
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h->chunk = lp;
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}
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else if (obj != 0)
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/* obj is not in any of the chunks! */
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abort ();
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}
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# ifdef _LIBC
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/* Older versions of libc used a function _obstack_free intended to be
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called by non-GCC compilers. */
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strong_alias (obstack_free, _obstack_free)
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# endif
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int
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_obstack_memory_used (struct obstack *h)
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{
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register struct _obstack_chunk* lp;
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register int nbytes = 0;
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for (lp = h->chunk; lp != 0; lp = lp->prev)
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{
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nbytes += lp->limit - (char *) lp;
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}
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return nbytes;
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}
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/* Define the error handler. */
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# ifdef _LIBC
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# include <libintl.h>
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# else
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# include "gettext.h"
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# endif
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# ifndef _
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# define _(msgid) gettext (msgid)
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# endif
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# ifdef _LIBC
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# include <libio/iolibio.h>
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# endif
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# ifndef __attribute__
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/* This feature is available in gcc versions 2.5 and later. */
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# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
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# define __attribute__(Spec) /* empty */
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# endif
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# endif
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static void
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__attribute__ ((noreturn))
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print_and_abort (void)
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{
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/* Don't change any of these strings. Yes, it would be possible to add
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the newline to the string and use fputs or so. But this must not
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happen because the "memory exhausted" message appears in other places
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like this and the translation should be reused instead of creating
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a very similar string which requires a separate translation. */
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# ifdef _LIBC
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(void) __fxprintf (NULL, "%s\n", _("memory exhausted"));
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# else
|
||||
fprintf (stderr, "%s\n", _("memory exhausted"));
|
||||
# endif
|
||||
exit (obstack_exit_failure);
|
||||
}
|
||||
|
||||
#endif /* !ELIDE_CODE */
|
509
compat/obstack.h
Normal file
509
compat/obstack.h
Normal file
|
@ -0,0 +1,509 @@
|
|||
/* obstack.h - object stack macros
|
||||
Copyright (C) 1988-1994,1996-1999,2003,2004,2005,2009
|
||||
Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
The GNU C Library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
The GNU C Library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with the GNU C Library; if not, write to the Free
|
||||
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||||
Boston, MA 02110-1301, USA. */
|
||||
|
||||
/* Summary:
|
||||
|
||||
All the apparent functions defined here are macros. The idea
|
||||
is that you would use these pre-tested macros to solve a
|
||||
very specific set of problems, and they would run fast.
|
||||
Caution: no side-effects in arguments please!! They may be
|
||||
evaluated MANY times!!
|
||||
|
||||
These macros operate a stack of objects. Each object starts life
|
||||
small, and may grow to maturity. (Consider building a word syllable
|
||||
by syllable.) An object can move while it is growing. Once it has
|
||||
been "finished" it never changes address again. So the "top of the
|
||||
stack" is typically an immature growing object, while the rest of the
|
||||
stack is of mature, fixed size and fixed address objects.
|
||||
|
||||
These routines grab large chunks of memory, using a function you
|
||||
supply, called `obstack_chunk_alloc'. On occasion, they free chunks,
|
||||
by calling `obstack_chunk_free'. You must define them and declare
|
||||
them before using any obstack macros.
|
||||
|
||||
Each independent stack is represented by a `struct obstack'.
|
||||
Each of the obstack macros expects a pointer to such a structure
|
||||
as the first argument.
|
||||
|
||||
One motivation for this package is the problem of growing char strings
|
||||
in symbol tables. Unless you are "fascist pig with a read-only mind"
|
||||
--Gosper's immortal quote from HAKMEM item 154, out of context--you
|
||||
would not like to put any arbitrary upper limit on the length of your
|
||||
symbols.
|
||||
|
||||
In practice this often means you will build many short symbols and a
|
||||
few long symbols. At the time you are reading a symbol you don't know
|
||||
how long it is. One traditional method is to read a symbol into a
|
||||
buffer, realloc()ating the buffer every time you try to read a symbol
|
||||
that is longer than the buffer. This is beaut, but you still will
|
||||
want to copy the symbol from the buffer to a more permanent
|
||||
symbol-table entry say about half the time.
|
||||
|
||||
With obstacks, you can work differently. Use one obstack for all symbol
|
||||
names. As you read a symbol, grow the name in the obstack gradually.
|
||||
When the name is complete, finalize it. Then, if the symbol exists already,
|
||||
free the newly read name.
|
||||
|
||||
The way we do this is to take a large chunk, allocating memory from
|
||||
low addresses. When you want to build a symbol in the chunk you just
|
||||
add chars above the current "high water mark" in the chunk. When you
|
||||
have finished adding chars, because you got to the end of the symbol,
|
||||
you know how long the chars are, and you can create a new object.
|
||||
Mostly the chars will not burst over the highest address of the chunk,
|
||||
because you would typically expect a chunk to be (say) 100 times as
|
||||
long as an average object.
|
||||
|
||||
In case that isn't clear, when we have enough chars to make up
|
||||
the object, THEY ARE ALREADY CONTIGUOUS IN THE CHUNK (guaranteed)
|
||||
so we just point to it where it lies. No moving of chars is
|
||||
needed and this is the second win: potentially long strings need
|
||||
never be explicitly shuffled. Once an object is formed, it does not
|
||||
change its address during its lifetime.
|
||||
|
||||
When the chars burst over a chunk boundary, we allocate a larger
|
||||
chunk, and then copy the partly formed object from the end of the old
|
||||
chunk to the beginning of the new larger chunk. We then carry on
|
||||
accreting characters to the end of the object as we normally would.
|
||||
|
||||
A special macro is provided to add a single char at a time to a
|
||||
growing object. This allows the use of register variables, which
|
||||
break the ordinary 'growth' macro.
|
||||
|
||||
Summary:
|
||||
We allocate large chunks.
|
||||
We carve out one object at a time from the current chunk.
|
||||
Once carved, an object never moves.
|
||||
We are free to append data of any size to the currently
|
||||
growing object.
|
||||
Exactly one object is growing in an obstack at any one time.
|
||||
You can run one obstack per control block.
|
||||
You may have as many control blocks as you dare.
|
||||
Because of the way we do it, you can `unwind' an obstack
|
||||
back to a previous state. (You may remove objects much
|
||||
as you would with a stack.)
|
||||
*/
|
||||
|
||||
|
||||
/* Don't do the contents of this file more than once. */
|
||||
|
||||
#ifndef _OBSTACK_H
|
||||
#define _OBSTACK_H 1
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/* We need the type of a pointer subtraction. If __PTRDIFF_TYPE__ is
|
||||
defined, as with GNU C, use that; that way we don't pollute the
|
||||
namespace with <stddef.h>'s symbols. Otherwise, include <stddef.h>
|
||||
and use ptrdiff_t. */
|
||||
|
||||
#ifdef __PTRDIFF_TYPE__
|
||||
# define PTR_INT_TYPE __PTRDIFF_TYPE__
|
||||
#else
|
||||
# include <stddef.h>
|
||||
# define PTR_INT_TYPE ptrdiff_t
|
||||
#endif
|
||||
|
||||
/* If B is the base of an object addressed by P, return the result of
|
||||
aligning P to the next multiple of A + 1. B and P must be of type
|
||||
char *. A + 1 must be a power of 2. */
|
||||
|
||||
#define __BPTR_ALIGN(B, P, A) ((B) + (((P) - (B) + (A)) & ~(A)))
|
||||
|
||||
/* Similiar to _BPTR_ALIGN (B, P, A), except optimize the common case
|
||||
where pointers can be converted to integers, aligned as integers,
|
||||
and converted back again. If PTR_INT_TYPE is narrower than a
|
||||
pointer (e.g., the AS/400), play it safe and compute the alignment
|
||||
relative to B. Otherwise, use the faster strategy of computing the
|
||||
alignment relative to 0. */
|
||||
|
||||
#define __PTR_ALIGN(B, P, A) \
|
||||
__BPTR_ALIGN (sizeof (PTR_INT_TYPE) < sizeof (void *) ? (B) : (char *) 0, \
|
||||
P, A)
|
||||
|
||||
#include <string.h>
|
||||
|
||||
struct _obstack_chunk /* Lives at front of each chunk. */
|
||||
{
|
||||
char *limit; /* 1 past end of this chunk */
|
||||
struct _obstack_chunk *prev; /* address of prior chunk or NULL */
|
||||
char contents[4]; /* objects begin here */
|
||||
};
|
||||
|
||||
struct obstack /* control current object in current chunk */
|
||||
{
|
||||
long chunk_size; /* preferred size to allocate chunks in */
|
||||
struct _obstack_chunk *chunk; /* address of current struct obstack_chunk */
|
||||
char *object_base; /* address of object we are building */
|
||||
char *next_free; /* where to add next char to current object */
|
||||
char *chunk_limit; /* address of char after current chunk */
|
||||
union
|
||||
{
|
||||
PTR_INT_TYPE tempint;
|
||||
void *tempptr;
|
||||
} temp; /* Temporary for some macros. */
|
||||
int alignment_mask; /* Mask of alignment for each object. */
|
||||
/* These prototypes vary based on `use_extra_arg', and we use
|
||||
casts to the prototypeless function type in all assignments,
|
||||
but having prototypes here quiets -Wstrict-prototypes. */
|
||||
struct _obstack_chunk *(*chunkfun) (void *, long);
|
||||
void (*freefun) (void *, struct _obstack_chunk *);
|
||||
void *extra_arg; /* first arg for chunk alloc/dealloc funcs */
|
||||
unsigned use_extra_arg:1; /* chunk alloc/dealloc funcs take extra arg */
|
||||
unsigned maybe_empty_object:1;/* There is a possibility that the current
|
||||
chunk contains a zero-length object. This
|
||||
prevents freeing the chunk if we allocate
|
||||
a bigger chunk to replace it. */
|
||||
unsigned alloc_failed:1; /* No longer used, as we now call the failed
|
||||
handler on error, but retained for binary
|
||||
compatibility. */
|
||||
};
|
||||
|
||||
/* Declare the external functions we use; they are in obstack.c. */
|
||||
|
||||
extern void _obstack_newchunk (struct obstack *, int);
|
||||
extern int _obstack_begin (struct obstack *, int, int,
|
||||
void *(*) (long), void (*) (void *));
|
||||
extern int _obstack_begin_1 (struct obstack *, int, int,
|
||||
void *(*) (void *, long),
|
||||
void (*) (void *, void *), void *);
|
||||
extern int _obstack_memory_used (struct obstack *);
|
||||
|
||||
void obstack_free (struct obstack *__obstack, void *__block);
|
||||
|
||||
|
||||
/* Error handler called when `obstack_chunk_alloc' failed to allocate
|
||||
more memory. This can be set to a user defined function which
|
||||
should either abort gracefully or use longjump - but shouldn't
|
||||
return. The default action is to print a message and abort. */
|
||||
extern void (*obstack_alloc_failed_handler) (void);
|
||||
|
||||
/* Exit value used when `print_and_abort' is used. */
|
||||
extern int obstack_exit_failure;
|
||||
|
||||
/* Pointer to beginning of object being allocated or to be allocated next.
|
||||
Note that this might not be the final address of the object
|
||||
because a new chunk might be needed to hold the final size. */
|
||||
|
||||
#define obstack_base(h) ((void *) (h)->object_base)
|
||||
|
||||
/* Size for allocating ordinary chunks. */
|
||||
|
||||
#define obstack_chunk_size(h) ((h)->chunk_size)
|
||||
|
||||
/* Pointer to next byte not yet allocated in current chunk. */
|
||||
|
||||
#define obstack_next_free(h) ((h)->next_free)
|
||||
|
||||
/* Mask specifying low bits that should be clear in address of an object. */
|
||||
|
||||
#define obstack_alignment_mask(h) ((h)->alignment_mask)
|
||||
|
||||
/* To prevent prototype warnings provide complete argument list. */
|
||||
#define obstack_init(h) \
|
||||
_obstack_begin ((h), 0, 0, \
|
||||
(void *(*) (long)) obstack_chunk_alloc, \
|
||||
(void (*) (void *)) obstack_chunk_free)
|
||||
|
||||
#define obstack_begin(h, size) \
|
||||
_obstack_begin ((h), (size), 0, \
|
||||
(void *(*) (long)) obstack_chunk_alloc, \
|
||||
(void (*) (void *)) obstack_chunk_free)
|
||||
|
||||
#define obstack_specify_allocation(h, size, alignment, chunkfun, freefun) \
|
||||
_obstack_begin ((h), (size), (alignment), \
|
||||
(void *(*) (long)) (chunkfun), \
|
||||
(void (*) (void *)) (freefun))
|
||||
|
||||
#define obstack_specify_allocation_with_arg(h, size, alignment, chunkfun, freefun, arg) \
|
||||
_obstack_begin_1 ((h), (size), (alignment), \
|
||||
(void *(*) (void *, long)) (chunkfun), \
|
||||
(void (*) (void *, void *)) (freefun), (arg))
|
||||
|
||||
#define obstack_chunkfun(h, newchunkfun) \
|
||||
((h) -> chunkfun = (struct _obstack_chunk *(*)(void *, long)) (newchunkfun))
|
||||
|
||||
#define obstack_freefun(h, newfreefun) \
|
||||
((h) -> freefun = (void (*)(void *, struct _obstack_chunk *)) (newfreefun))
|
||||
|
||||
#define obstack_1grow_fast(h,achar) (*((h)->next_free)++ = (achar))
|
||||
|
||||
#define obstack_blank_fast(h,n) ((h)->next_free += (n))
|
||||
|
||||
#define obstack_memory_used(h) _obstack_memory_used (h)
|
||||
|
||||
#if defined __GNUC__ && defined __STDC__ && __STDC__
|
||||
/* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and
|
||||
does not implement __extension__. But that compiler doesn't define
|
||||
__GNUC_MINOR__. */
|
||||
# if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__)
|
||||
# define __extension__
|
||||
# endif
|
||||
|
||||
/* For GNU C, if not -traditional,
|
||||
we can define these macros to compute all args only once
|
||||
without using a global variable.
|
||||
Also, we can avoid using the `temp' slot, to make faster code. */
|
||||
|
||||
# define obstack_object_size(OBSTACK) \
|
||||
__extension__ \
|
||||
({ struct obstack const *__o = (OBSTACK); \
|
||||
(unsigned) (__o->next_free - __o->object_base); })
|
||||
|
||||
# define obstack_room(OBSTACK) \
|
||||
__extension__ \
|
||||
({ struct obstack const *__o = (OBSTACK); \
|
||||
(unsigned) (__o->chunk_limit - __o->next_free); })
|
||||
|
||||
# define obstack_make_room(OBSTACK,length) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o = (OBSTACK); \
|
||||
int __len = (length); \
|
||||
if (__o->chunk_limit - __o->next_free < __len) \
|
||||
_obstack_newchunk (__o, __len); \
|
||||
(void) 0; })
|
||||
|
||||
# define obstack_empty_p(OBSTACK) \
|
||||
__extension__ \
|
||||
({ struct obstack const *__o = (OBSTACK); \
|
||||
(__o->chunk->prev == 0 \
|
||||
&& __o->next_free == __PTR_ALIGN ((char *) __o->chunk, \
|
||||
__o->chunk->contents, \
|
||||
__o->alignment_mask)); })
|
||||
|
||||
# define obstack_grow(OBSTACK,where,length) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o = (OBSTACK); \
|
||||
int __len = (length); \
|
||||
if (__o->next_free + __len > __o->chunk_limit) \
|
||||
_obstack_newchunk (__o, __len); \
|
||||
memcpy (__o->next_free, where, __len); \
|
||||
__o->next_free += __len; \
|
||||
(void) 0; })
|
||||
|
||||
# define obstack_grow0(OBSTACK,where,length) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o = (OBSTACK); \
|
||||
int __len = (length); \
|
||||
if (__o->next_free + __len + 1 > __o->chunk_limit) \
|
||||
_obstack_newchunk (__o, __len + 1); \
|
||||
memcpy (__o->next_free, where, __len); \
|
||||
__o->next_free += __len; \
|
||||
*(__o->next_free)++ = 0; \
|
||||
(void) 0; })
|
||||
|
||||
# define obstack_1grow(OBSTACK,datum) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o = (OBSTACK); \
|
||||
if (__o->next_free + 1 > __o->chunk_limit) \
|
||||
_obstack_newchunk (__o, 1); \
|
||||
obstack_1grow_fast (__o, datum); \
|
||||
(void) 0; })
|
||||
|
||||
/* These assume that the obstack alignment is good enough for pointers
|
||||
or ints, and that the data added so far to the current object
|
||||
shares that much alignment. */
|
||||
|
||||
# define obstack_ptr_grow(OBSTACK,datum) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o = (OBSTACK); \
|
||||
if (__o->next_free + sizeof (void *) > __o->chunk_limit) \
|
||||
_obstack_newchunk (__o, sizeof (void *)); \
|
||||
obstack_ptr_grow_fast (__o, datum); }) \
|
||||
|
||||
# define obstack_int_grow(OBSTACK,datum) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o = (OBSTACK); \
|
||||
if (__o->next_free + sizeof (int) > __o->chunk_limit) \
|
||||
_obstack_newchunk (__o, sizeof (int)); \
|
||||
obstack_int_grow_fast (__o, datum); })
|
||||
|
||||
# define obstack_ptr_grow_fast(OBSTACK,aptr) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o1 = (OBSTACK); \
|
||||
*(const void **) __o1->next_free = (aptr); \
|
||||
__o1->next_free += sizeof (const void *); \
|
||||
(void) 0; })
|
||||
|
||||
# define obstack_int_grow_fast(OBSTACK,aint) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o1 = (OBSTACK); \
|
||||
*(int *) __o1->next_free = (aint); \
|
||||
__o1->next_free += sizeof (int); \
|
||||
(void) 0; })
|
||||
|
||||
# define obstack_blank(OBSTACK,length) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o = (OBSTACK); \
|
||||
int __len = (length); \
|
||||
if (__o->chunk_limit - __o->next_free < __len) \
|
||||
_obstack_newchunk (__o, __len); \
|
||||
obstack_blank_fast (__o, __len); \
|
||||
(void) 0; })
|
||||
|
||||
# define obstack_alloc(OBSTACK,length) \
|
||||
__extension__ \
|
||||
({ struct obstack *__h = (OBSTACK); \
|
||||
obstack_blank (__h, (length)); \
|
||||
obstack_finish (__h); })
|
||||
|
||||
# define obstack_copy(OBSTACK,where,length) \
|
||||
__extension__ \
|
||||
({ struct obstack *__h = (OBSTACK); \
|
||||
obstack_grow (__h, (where), (length)); \
|
||||
obstack_finish (__h); })
|
||||
|
||||
# define obstack_copy0(OBSTACK,where,length) \
|
||||
__extension__ \
|
||||
({ struct obstack *__h = (OBSTACK); \
|
||||
obstack_grow0 (__h, (where), (length)); \
|
||||
obstack_finish (__h); })
|
||||
|
||||
/* The local variable is named __o1 to avoid a name conflict
|
||||
when obstack_blank is called. */
|
||||
# define obstack_finish(OBSTACK) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o1 = (OBSTACK); \
|
||||
void *__value = (void *) __o1->object_base; \
|
||||
if (__o1->next_free == __value) \
|
||||
__o1->maybe_empty_object = 1; \
|
||||
__o1->next_free \
|
||||
= __PTR_ALIGN (__o1->object_base, __o1->next_free, \
|
||||
__o1->alignment_mask); \
|
||||
if (__o1->next_free - (char *)__o1->chunk \
|
||||
> __o1->chunk_limit - (char *)__o1->chunk) \
|
||||
__o1->next_free = __o1->chunk_limit; \
|
||||
__o1->object_base = __o1->next_free; \
|
||||
__value; })
|
||||
|
||||
# define obstack_free(OBSTACK, OBJ) \
|
||||
__extension__ \
|
||||
({ struct obstack *__o = (OBSTACK); \
|
||||
void *__obj = (OBJ); \
|
||||
if (__obj > (void *)__o->chunk && __obj < (void *)__o->chunk_limit) \
|
||||
__o->next_free = __o->object_base = (char *)__obj; \
|
||||
else (obstack_free) (__o, __obj); })
|
||||
|
||||
#else /* not __GNUC__ or not __STDC__ */
|
||||
|
||||
# define obstack_object_size(h) \
|
||||
(unsigned) ((h)->next_free - (h)->object_base)
|
||||
|
||||
# define obstack_room(h) \
|
||||
(unsigned) ((h)->chunk_limit - (h)->next_free)
|
||||
|
||||
# define obstack_empty_p(h) \
|
||||
((h)->chunk->prev == 0 \
|
||||
&& (h)->next_free == __PTR_ALIGN ((char *) (h)->chunk, \
|
||||
(h)->chunk->contents, \
|
||||
(h)->alignment_mask))
|
||||
|
||||
/* Note that the call to _obstack_newchunk is enclosed in (..., 0)
|
||||
so that we can avoid having void expressions
|
||||
in the arms of the conditional expression.
|
||||
Casting the third operand to void was tried before,
|
||||
but some compilers won't accept it. */
|
||||
|
||||
# define obstack_make_room(h,length) \
|
||||
( (h)->temp.tempint = (length), \
|
||||
(((h)->next_free + (h)->temp.tempint > (h)->chunk_limit) \
|
||||
? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0))
|
||||
|
||||
# define obstack_grow(h,where,length) \
|
||||
( (h)->temp.tempint = (length), \
|
||||
(((h)->next_free + (h)->temp.tempint > (h)->chunk_limit) \
|
||||
? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0), \
|
||||
memcpy ((h)->next_free, where, (h)->temp.tempint), \
|
||||
(h)->next_free += (h)->temp.tempint)
|
||||
|
||||
# define obstack_grow0(h,where,length) \
|
||||
( (h)->temp.tempint = (length), \
|
||||
(((h)->next_free + (h)->temp.tempint + 1 > (h)->chunk_limit) \
|
||||
? (_obstack_newchunk ((h), (h)->temp.tempint + 1), 0) : 0), \
|
||||
memcpy ((h)->next_free, where, (h)->temp.tempint), \
|
||||
(h)->next_free += (h)->temp.tempint, \
|
||||
*((h)->next_free)++ = 0)
|
||||
|
||||
# define obstack_1grow(h,datum) \
|
||||
( (((h)->next_free + 1 > (h)->chunk_limit) \
|
||||
? (_obstack_newchunk ((h), 1), 0) : 0), \
|
||||
obstack_1grow_fast (h, datum))
|
||||
|
||||
# define obstack_ptr_grow(h,datum) \
|
||||
( (((h)->next_free + sizeof (char *) > (h)->chunk_limit) \
|
||||
? (_obstack_newchunk ((h), sizeof (char *)), 0) : 0), \
|
||||
obstack_ptr_grow_fast (h, datum))
|
||||
|
||||
# define obstack_int_grow(h,datum) \
|
||||
( (((h)->next_free + sizeof (int) > (h)->chunk_limit) \
|
||||
? (_obstack_newchunk ((h), sizeof (int)), 0) : 0), \
|
||||
obstack_int_grow_fast (h, datum))
|
||||
|
||||
# define obstack_ptr_grow_fast(h,aptr) \
|
||||
(((const void **) ((h)->next_free += sizeof (void *)))[-1] = (aptr))
|
||||
|
||||
# define obstack_int_grow_fast(h,aint) \
|
||||
(((int *) ((h)->next_free += sizeof (int)))[-1] = (aint))
|
||||
|
||||
# define obstack_blank(h,length) \
|
||||
( (h)->temp.tempint = (length), \
|
||||
(((h)->chunk_limit - (h)->next_free < (h)->temp.tempint) \
|
||||
? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0), \
|
||||
obstack_blank_fast (h, (h)->temp.tempint))
|
||||
|
||||
# define obstack_alloc(h,length) \
|
||||
(obstack_blank ((h), (length)), obstack_finish ((h)))
|
||||
|
||||
# define obstack_copy(h,where,length) \
|
||||
(obstack_grow ((h), (where), (length)), obstack_finish ((h)))
|
||||
|
||||
# define obstack_copy0(h,where,length) \
|
||||
(obstack_grow0 ((h), (where), (length)), obstack_finish ((h)))
|
||||
|
||||
# define obstack_finish(h) \
|
||||
( ((h)->next_free == (h)->object_base \
|
||||
? (((h)->maybe_empty_object = 1), 0) \
|
||||
: 0), \
|
||||
(h)->temp.tempptr = (h)->object_base, \
|
||||
(h)->next_free \
|
||||
= __PTR_ALIGN ((h)->object_base, (h)->next_free, \
|
||||
(h)->alignment_mask), \
|
||||
(((h)->next_free - (char *) (h)->chunk \
|
||||
> (h)->chunk_limit - (char *) (h)->chunk) \
|
||||
? ((h)->next_free = (h)->chunk_limit) : 0), \
|
||||
(h)->object_base = (h)->next_free, \
|
||||
(h)->temp.tempptr)
|
||||
|
||||
# define obstack_free(h,obj) \
|
||||
( (h)->temp.tempint = (char *) (obj) - (char *) (h)->chunk, \
|
||||
((((h)->temp.tempint > 0 \
|
||||
&& (h)->temp.tempint < (h)->chunk_limit - (char *) (h)->chunk)) \
|
||||
? (int) ((h)->next_free = (h)->object_base \
|
||||
= (h)->temp.tempint + (char *) (h)->chunk) \
|
||||
: (((obstack_free) ((h), (h)->temp.tempint + (char *) (h)->chunk), 0), 0)))
|
||||
|
||||
#endif /* not __GNUC__ or not __STDC__ */
|
||||
|
||||
#ifdef __cplusplus
|
||||
} /* C++ */
|
||||
#endif
|
||||
|
||||
#endif /* obstack.h */
|
Loading…
Reference in a new issue