mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-07 00:50:50 +00:00
Add implementations of wscanf() and related functions: fwscanf(), swscanf(),
vfwscanf(), vswscanf(), vwscanf(). As the name suggests, these are wide- character versions of the scanf() family of functions.
This commit is contained in:
parent
f50b861cbf
commit
1f4ff8506a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=103856
|
@ -112,6 +112,7 @@ wint_t fputwc(wchar_t, struct __sFILE *);
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int fputws(const wchar_t * __restrict, struct __sFILE * __restrict);
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int fwide(struct __sFILE *, int);
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int fwprintf(struct __sFILE * __restrict, const wchar_t * __restrict, ...);
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int fwscanf(struct __sFILE * __restrict, const wchar_t * __restrict, ...);
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wint_t getwc(struct __sFILE *);
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wint_t getwchar(void);
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size_t mbrlen(const char * __restrict, size_t, mbstate_t * __restrict);
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@ -124,12 +125,18 @@ wint_t putwc(wchar_t, struct __sFILE *);
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wint_t putwchar(wchar_t);
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int swprintf(wchar_t * __restrict, size_t n, const wchar_t * __restrict,
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...);
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int swscanf(const wchar_t * __restrict, const wchar_t * __restrict, ...);
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wint_t ungetwc(wint_t, struct __sFILE *);
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int vfwprintf(struct __sFILE * __restrict, const wchar_t * __restrict,
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__va_list);
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int vfwscanf(struct __sFILE * __restrict, const wchar_t * __restrict,
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__va_list);
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int vswprintf(wchar_t * __restrict, size_t n, const wchar_t * __restrict,
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__va_list);
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int vswscanf(const wchar_t * __restrict, const wchar_t * __restrict,
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__va_list);
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int vwprintf(const wchar_t * __restrict, __va_list);
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int vwscanf(const wchar_t * __restrict, __va_list);
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size_t wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
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wchar_t *wcscat(wchar_t * __restrict, const wchar_t * __restrict);
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wchar_t *wcschr(const wchar_t *, wchar_t);
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@ -166,6 +173,7 @@ wchar_t *wmemcpy(wchar_t * __restrict, const wchar_t * __restrict, size_t);
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wchar_t *wmemmove(wchar_t *, const wchar_t *, size_t);
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wchar_t *wmemset(wchar_t *, wchar_t, size_t);
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int wprintf(const wchar_t * __restrict, ...);
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int wscanf(const wchar_t * __restrict, ...);
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#if __XSI_VISIBLE
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int wcswidth(const wchar_t *, size_t);
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@ -8,21 +8,24 @@ SRCS+= _flock_stub.c asprintf.c clrerr.c fclose.c fdopen.c feof.c ferror.c \
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fflush.c fgetc.c fgetln.c fgetpos.c fgets.c fgetwc.c fgetws.c \
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fileno.c findfp.c flags.c fopen.c fprintf.c fpurge.c fputc.c fputs.c \
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fputwc.c fputws.c fread.c freopen.c fscanf.c fseek.c fsetpos.c \
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ftell.c funopen.c fvwrite.c fwalk.c fwide.c fwprintf.c fwrite.c getc.c \
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ftell.c funopen.c fvwrite.c fwalk.c fwide.c fwprintf.c fwscanf.c \
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fwrite.c getc.c \
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getchar.c gets.c getw.c getwc.c getwchar.c makebuf.c mktemp.c \
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perror.c printf.c putc.c putchar.c puts.c putw.c putwc.c putwchar.c \
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refill.c remove.c rewind.c rget.c scanf.c setbuf.c setbuffer.c \
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setvbuf.c snprintf.c sprintf.c sscanf.c stdio.c swprintf.c tempnam.c \
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tmpfile.c \
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setvbuf.c snprintf.c sprintf.c sscanf.c stdio.c swprintf.c swscanf.c \
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tempnam.c tmpfile.c \
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tmpnam.c ungetc.c ungetwc.c vasprintf.c vfprintf.c vfscanf.c \
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vfwprintf.c vprintf.c vscanf.c vsnprintf.c vsprintf.c vsscanf.c \
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vswprintf.c vwprintf.c wbuf.c wprintf.c wsetup.c
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vfwprintf.c vfwscanf.c vprintf.c vscanf.c vsnprintf.c vsprintf.c \
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vsscanf.c \
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vswprintf.c vswscanf.c vwprintf.c vwscanf.c wbuf.c wprintf.c wscanf.c \
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wsetup.c
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.if ${LIB} == "c"
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MAN+= fclose.3 ferror.3 fflush.3 fgetln.3 fgets.3 fgetws.3 fopen.3 fputs.3 \
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fputws.3 fread.3 fseek.3 funopen.3 fwide.3 getc.3 getwc.3 mktemp.3 \
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printf.3 putc.3 putwc.3 remove.3 scanf.3 setbuf.3 stdio.3 tmpnam.3 \
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ungetc.3 ungetwc.3 wprintf.3
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ungetc.3 ungetwc.3 wprintf.3 wscanf.3
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MLINKS+=ferror.3 clearerr.3 ferror.3 feof.3 ferror.3 fileno.3
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MLINKS+=fflush.3 fpurge.3
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@ -49,4 +52,6 @@ MLINKS+=setbuf.3 setbuffer.3 setbuf.3 setlinebuf.3 setbuf.3 setvbuf.3
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MLINKS+=tmpnam.3 tempnam.3 tmpnam.3 tmpfile.3
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MLINKS+=wprintf.3 fwprintf.3 wprintf.3 swprintf.3 \
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wprintf.3 vwprintf.3 wprintf.3 vfwprintf.3 wprintf.3 vswprintf.3
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MLINKS+=wscanf.3 fwscanf.3 wscanf.3 swscanf.3 wscanf.3 vwscanf.3 \
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wscanf.3 vswscanf.3 wscanf.3 vfwscanf.3
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.endif
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45
lib/libc/stdio/fwscanf.c
Normal file
45
lib/libc/stdio/fwscanf.c
Normal file
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@ -0,0 +1,45 @@
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/*-
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* Copyright (c) 2002 Tim J. Robbins
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdarg.h>
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#include <stdio.h>
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#include <wchar.h>
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int
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fwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, ...)
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{
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va_list ap;
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int r;
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va_start(ap, fmt);
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r = vfwscanf(fp, fmt, ap);
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va_end(ap);
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return (r);
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}
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@ -74,6 +74,8 @@ extern int __ungetc(int, FILE *);
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extern wint_t __ungetwc(wint_t, FILE *);
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extern int __vfprintf(FILE *, const char *, __va_list);
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extern int __vfwprintf(FILE *, const wchar_t *, __va_list);
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extern int __vfwscanf(FILE * __restrict, const wchar_t * __restrict,
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__va_list);
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extern int __sdidinit;
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45
lib/libc/stdio/swscanf.c
Normal file
45
lib/libc/stdio/swscanf.c
Normal file
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@ -0,0 +1,45 @@
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/*-
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* Copyright (c) 2002 Tim J. Robbins
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdarg.h>
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#include <stdio.h>
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#include <wchar.h>
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int
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swscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt, ...)
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{
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va_list ap;
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int r;
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va_start(ap, fmt);
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r = vswscanf(str, fmt, ap);
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va_end(ap);
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return (r);
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}
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748
lib/libc/stdio/vfwscanf.c
Normal file
748
lib/libc/stdio/vfwscanf.c
Normal file
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@ -0,0 +1,748 @@
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if 0
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)vfscanf.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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__FBSDID("FreeBSD: src/lib/libc/stdio/vfscanf.c,v 1.24 2002/08/13 09:30:41 tjr Exp ");
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#endif
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <ctype.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <string.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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#include "local.h"
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#define FLOATING_POINT
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#ifdef FLOATING_POINT
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#include <locale.h>
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#include "floatio.h"
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#endif
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#define BUF 513 /* Maximum length of numeric string. */
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/*
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* Flags used during conversion.
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*/
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#define LONG 0x01 /* l: long or double */
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#define LONGDBL 0x02 /* L: long double */
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#define SHORT 0x04 /* h: short */
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#define SUPPRESS 0x08 /* *: suppress assignment */
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#define POINTER 0x10 /* p: void * (as hex) */
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#define NOSKIP 0x20 /* [ or c: do not skip blanks */
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#define LONGLONG 0x400 /* ll: long long (+ deprecated q: quad) */
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#define INTMAXT 0x800 /* j: intmax_t */
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#define PTRDIFFT 0x1000 /* t: ptrdiff_t */
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#define SIZET 0x2000 /* z: size_t */
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#define SHORTSHORT 0x4000 /* hh: char */
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#define UNSIGNED 0x8000 /* %[oupxX] conversions */
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/*
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* The following are used in numeric conversions only:
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* SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point;
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* SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral.
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*/
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#define SIGNOK 0x40 /* +/- is (still) legal */
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#define NDIGITS 0x80 /* no digits detected */
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#define DPTOK 0x100 /* (float) decimal point is still legal */
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#define EXPOK 0x200 /* (float) exponent (e+3, etc) still legal */
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#define PFXOK 0x100 /* 0x prefix is (still) legal */
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#define NZDIGITS 0x200 /* no zero digits detected */
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/*
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* Conversion types.
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*/
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#define CT_CHAR 0 /* %c conversion */
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#define CT_CCL 1 /* %[...] conversion */
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#define CT_STRING 2 /* %s conversion */
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#define CT_INT 3 /* %[dioupxX] conversion */
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#define CT_FLOAT 4 /* %[efgEFG] conversion */
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#define INCCL(_c) \
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(cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL) : \
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(wmemchr(ccls, (_c), ccle - ccls) != NULL))
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/*
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* MT-safe version.
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*/
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int
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vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, va_list ap)
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{
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int ret;
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FLOCKFILE(fp);
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ORIENT(fp, 1);
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ret = __vfwscanf(fp, fmt, ap);
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FUNLOCKFILE(fp);
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return (ret);
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}
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/*
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* Non-MT-safe version.
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*/
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int
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__vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, va_list ap)
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{
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wint_t c; /* character from format, or conversion */
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size_t width; /* field width, or 0 */
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wchar_t *p; /* points into all kinds of strings */
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int n; /* handy integer */
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int flags; /* flags as defined above */
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wchar_t *p0; /* saves original value of p when necessary */
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int nassigned; /* number of fields assigned */
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int nconversions; /* number of conversions */
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int nread; /* number of characters consumed from fp */
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int base; /* base argument to conversion function */
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wchar_t buf[BUF]; /* buffer for numeric conversions */
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const wchar_t *ccls; /* character class start */
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const wchar_t *ccle; /* character class end */
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int cclcompl; /* ccl is complemented? */
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wint_t wi; /* handy wint_t */
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char *mbp; /* multibyte string pointer for %c %s %[ */
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size_t nconv; /* number of bytes in mb. conversion */
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mbstate_t mbs; /* multibyte state */
|
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|
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/* `basefix' is used to avoid `if' tests in the integer scanner */
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static short basefix[17] =
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{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
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#ifdef FLOATING_POINT
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char decimal_point = localeconv()->decimal_point[0];
|
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#endif
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nassigned = 0;
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nconversions = 0;
|
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nread = 0;
|
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ccls = ccle = NULL;
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for (;;) {
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c = *fmt++;
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if (c == 0)
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return (nassigned);
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if (iswspace(c)) {
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while ((c = __fgetwc(fp)) != WEOF &&
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iswspace(c))
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;
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if (c != WEOF)
|
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__ungetwc(c, fp);
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continue;
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}
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if (c != '%')
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goto literal;
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width = 0;
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flags = 0;
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/*
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* switch on the format. continue if done;
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* break once format type is derived.
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*/
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again: c = *fmt++;
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switch (c) {
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case '%':
|
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literal:
|
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if ((wi = __fgetwc(fp)) == WEOF)
|
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goto input_failure;
|
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if (wi != c) {
|
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__ungetwc(wi, fp);
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goto input_failure;
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}
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nread++;
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continue;
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case '*':
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flags |= SUPPRESS;
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goto again;
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case 'j':
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flags |= INTMAXT;
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goto again;
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case 'l':
|
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if (flags & LONG) {
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flags &= ~LONG;
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flags |= LONGLONG;
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} else
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flags |= LONG;
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goto again;
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case 'q':
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flags |= LONGLONG; /* not quite */
|
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goto again;
|
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case 't':
|
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flags |= PTRDIFFT;
|
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goto again;
|
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case 'z':
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flags |= SIZET;
|
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goto again;
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case 'L':
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flags |= LONGDBL;
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||||
goto again;
|
||||
case 'h':
|
||||
if (flags & SHORT) {
|
||||
flags &= ~SHORT;
|
||||
flags |= SHORTSHORT;
|
||||
} else
|
||||
flags |= SHORT;
|
||||
goto again;
|
||||
|
||||
case '0': case '1': case '2': case '3': case '4':
|
||||
case '5': case '6': case '7': case '8': case '9':
|
||||
width = width * 10 + c - '0';
|
||||
goto again;
|
||||
|
||||
/*
|
||||
* Conversions.
|
||||
*/
|
||||
case 'd':
|
||||
c = CT_INT;
|
||||
base = 10;
|
||||
break;
|
||||
|
||||
case 'i':
|
||||
c = CT_INT;
|
||||
base = 0;
|
||||
break;
|
||||
|
||||
case 'o':
|
||||
c = CT_INT;
|
||||
flags |= UNSIGNED;
|
||||
base = 8;
|
||||
break;
|
||||
|
||||
case 'u':
|
||||
c = CT_INT;
|
||||
flags |= UNSIGNED;
|
||||
base = 10;
|
||||
break;
|
||||
|
||||
case 'X':
|
||||
case 'x':
|
||||
flags |= PFXOK; /* enable 0x prefixing */
|
||||
c = CT_INT;
|
||||
flags |= UNSIGNED;
|
||||
base = 16;
|
||||
break;
|
||||
|
||||
#ifdef FLOATING_POINT
|
||||
case 'E': case 'F': case 'G':
|
||||
case 'e': case 'f': case 'g':
|
||||
c = CT_FLOAT;
|
||||
break;
|
||||
#endif
|
||||
|
||||
case 'S':
|
||||
flags |= LONG;
|
||||
/* FALLTHROUGH */
|
||||
case 's':
|
||||
c = CT_STRING;
|
||||
break;
|
||||
|
||||
case '[':
|
||||
ccls = fmt;
|
||||
if (*fmt == '^') {
|
||||
cclcompl = 1;
|
||||
fmt++;
|
||||
} else
|
||||
cclcompl = 0;
|
||||
if (*fmt == ']')
|
||||
fmt++;
|
||||
while (*fmt != '\0' && *fmt != ']')
|
||||
fmt++;
|
||||
ccle = fmt;
|
||||
fmt++;
|
||||
flags |= NOSKIP;
|
||||
c = CT_CCL;
|
||||
break;
|
||||
|
||||
case 'C':
|
||||
flags |= LONG;
|
||||
/* FALLTHROUGH */
|
||||
case 'c':
|
||||
flags |= NOSKIP;
|
||||
c = CT_CHAR;
|
||||
break;
|
||||
|
||||
case 'p': /* pointer format is like hex */
|
||||
flags |= POINTER | PFXOK;
|
||||
c = CT_INT; /* assumes sizeof(uintmax_t) */
|
||||
flags |= UNSIGNED; /* >= sizeof(uintptr_t) */
|
||||
base = 16;
|
||||
break;
|
||||
|
||||
case 'n':
|
||||
nconversions++;
|
||||
if (flags & SUPPRESS) /* ??? */
|
||||
continue;
|
||||
if (flags & SHORTSHORT)
|
||||
*va_arg(ap, char *) = nread;
|
||||
else if (flags & SHORT)
|
||||
*va_arg(ap, short *) = nread;
|
||||
else if (flags & LONG)
|
||||
*va_arg(ap, long *) = nread;
|
||||
else if (flags & LONGLONG)
|
||||
*va_arg(ap, long long *) = nread;
|
||||
else if (flags & INTMAXT)
|
||||
*va_arg(ap, intmax_t *) = nread;
|
||||
else if (flags & SIZET)
|
||||
*va_arg(ap, size_t *) = nread;
|
||||
else if (flags & PTRDIFFT)
|
||||
*va_arg(ap, ptrdiff_t *) = nread;
|
||||
else
|
||||
*va_arg(ap, int *) = nread;
|
||||
continue;
|
||||
|
||||
default:
|
||||
goto match_failure;
|
||||
|
||||
/*
|
||||
* Disgusting backwards compatibility hack. XXX
|
||||
*/
|
||||
case '\0': /* compat */
|
||||
return (EOF);
|
||||
}
|
||||
|
||||
/*
|
||||
* We have a conversion that requires input.
|
||||
*/
|
||||
if (fp->_r <= 0 && __srefill(fp))
|
||||
goto input_failure;
|
||||
|
||||
/*
|
||||
* Consume leading white space, except for formats
|
||||
* that suppress this.
|
||||
*/
|
||||
if ((flags & NOSKIP) == 0) {
|
||||
while ((wi = __fgetwc(fp)) != WEOF && iswspace(wi))
|
||||
nread++;
|
||||
if (wi == WEOF)
|
||||
goto input_failure;
|
||||
__ungetwc(wi, fp);
|
||||
}
|
||||
|
||||
/*
|
||||
* Do the conversion.
|
||||
*/
|
||||
switch (c) {
|
||||
|
||||
case CT_CHAR:
|
||||
/* scan arbitrary characters (sets NOSKIP) */
|
||||
if (width == 0)
|
||||
width = 1;
|
||||
if (flags & SUPPRESS) {
|
||||
while (width-- != 0 &&
|
||||
(wi = __fgetwc(fp)) != WEOF)
|
||||
nread++;
|
||||
} else if (flags & LONG) {
|
||||
p = va_arg(ap, wchar_t *);
|
||||
n = 0;
|
||||
while (width-- != 0 &&
|
||||
(wi = __fgetwc(fp)) != WEOF) {
|
||||
*p++ = (wchar_t)wi;
|
||||
n++;
|
||||
}
|
||||
if (n == 0)
|
||||
goto input_failure;
|
||||
nread += n;
|
||||
nassigned++;
|
||||
} else {
|
||||
mbp = va_arg(ap, char *);
|
||||
n = 0;
|
||||
memset(&mbs, 0, sizeof(mbs));
|
||||
while (width-- != 0 &&
|
||||
(wi = __fgetwc(fp)) != WEOF) {
|
||||
nconv = wcrtomb(mbp, wi, &mbs);
|
||||
if (nconv == (size_t)-1)
|
||||
goto input_failure;
|
||||
mbp += nconv;
|
||||
n++;
|
||||
}
|
||||
if (n == 0)
|
||||
goto input_failure;
|
||||
nread += n;
|
||||
nassigned++;
|
||||
}
|
||||
nconversions++;
|
||||
break;
|
||||
|
||||
case CT_CCL:
|
||||
/* scan a (nonempty) character class (sets NOSKIP) */
|
||||
if (width == 0)
|
||||
width = (size_t)~0; /* `infinity' */
|
||||
/* take only those things in the class */
|
||||
if (flags & SUPPRESS) {
|
||||
n = 0;
|
||||
while ((wi = __fgetwc(fp)) != WEOF &&
|
||||
width-- != 0 && INCCL(wi))
|
||||
n++;
|
||||
if (wi != WEOF)
|
||||
__ungetwc(wi, fp);
|
||||
if (n == 0)
|
||||
goto match_failure;
|
||||
} else if (flags & LONG) {
|
||||
p0 = p = va_arg(ap, wchar_t *);
|
||||
while ((wi = __fgetwc(fp)) != WEOF &&
|
||||
width-- != 0 && INCCL(wi))
|
||||
*p++ = (wchar_t)wi;
|
||||
if (wi != WEOF)
|
||||
__ungetwc(wi, fp);
|
||||
n = p - p0;
|
||||
if (n == 0)
|
||||
goto match_failure;
|
||||
*p = 0;
|
||||
nassigned++;
|
||||
} else {
|
||||
mbp = va_arg(ap, char *);
|
||||
n = 0;
|
||||
memset(&mbs, 0, sizeof(mbs));
|
||||
while ((wi = __fgetwc(fp)) != WEOF &&
|
||||
width-- != 0 && INCCL(wi)) {
|
||||
nconv = wcrtomb(mbp, wi, &mbs);
|
||||
if (nconv == (size_t)-1)
|
||||
goto input_failure;
|
||||
mbp += nconv;
|
||||
n++;
|
||||
}
|
||||
if (wi != WEOF)
|
||||
__ungetwc(wi, fp);
|
||||
*mbp = 0;
|
||||
nassigned++;
|
||||
}
|
||||
nread += n;
|
||||
nconversions++;
|
||||
break;
|
||||
|
||||
case CT_STRING:
|
||||
/* like CCL, but zero-length string OK, & no NOSKIP */
|
||||
if (width == 0)
|
||||
width = (size_t)~0;
|
||||
if (flags & SUPPRESS) {
|
||||
while ((wi = __fgetwc(fp)) != WEOF &&
|
||||
width-- != 0 &&
|
||||
!iswspace(wi))
|
||||
nread++;
|
||||
if (wi != WEOF)
|
||||
__ungetwc(wi, fp);
|
||||
} else if (flags & LONG) {
|
||||
p0 = p = va_arg(ap, wchar_t *);
|
||||
while ((wi = __fgetwc(fp)) != WEOF &&
|
||||
width-- != 0 &&
|
||||
!iswspace(wi)) {
|
||||
*p++ = (wchar_t)wi;
|
||||
nread++;
|
||||
}
|
||||
if (wi != WEOF)
|
||||
__ungetwc(wi, fp);
|
||||
*p = '\0';
|
||||
nassigned++;
|
||||
} else {
|
||||
mbp = va_arg(ap, char *);
|
||||
memset(&mbs, 0, sizeof(mbs));
|
||||
while ((wi = __fgetwc(fp)) != WEOF &&
|
||||
width-- != 0 &&
|
||||
!iswspace(wi)) {
|
||||
nconv = wcrtomb(mbp, wi, &mbs);
|
||||
if (nconv == (size_t)-1)
|
||||
goto input_failure;
|
||||
mbp += nconv;
|
||||
nread++;
|
||||
}
|
||||
if (wi != WEOF)
|
||||
__ungetwc(wi, fp);
|
||||
*mbp = 0;
|
||||
nassigned++;
|
||||
}
|
||||
nconversions++;
|
||||
continue;
|
||||
|
||||
case CT_INT:
|
||||
/* scan an integer as if by the conversion function */
|
||||
#ifdef hardway
|
||||
if (width == 0 || width > sizeof(buf) - 1)
|
||||
width = sizeof(buf) - 1;
|
||||
#else
|
||||
/* size_t is unsigned, hence this optimisation */
|
||||
if (--width > sizeof(buf) - 2)
|
||||
width = sizeof(buf) - 2;
|
||||
width++;
|
||||
#endif
|
||||
flags |= SIGNOK | NDIGITS | NZDIGITS;
|
||||
for (p = buf; width; width--) {
|
||||
c = __fgetwc(fp);
|
||||
/*
|
||||
* Switch on the character; `goto ok'
|
||||
* if we accept it as a part of number.
|
||||
*/
|
||||
switch (c) {
|
||||
|
||||
/*
|
||||
* The digit 0 is always legal, but is
|
||||
* special. For %i conversions, if no
|
||||
* digits (zero or nonzero) have been
|
||||
* scanned (only signs), we will have
|
||||
* base==0. In that case, we should set
|
||||
* it to 8 and enable 0x prefixing.
|
||||
* Also, if we have not scanned zero digits
|
||||
* before this, do not turn off prefixing
|
||||
* (someone else will turn it off if we
|
||||
* have scanned any nonzero digits).
|
||||
*/
|
||||
case '0':
|
||||
if (base == 0) {
|
||||
base = 8;
|
||||
flags |= PFXOK;
|
||||
}
|
||||
if (flags & NZDIGITS)
|
||||
flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
|
||||
else
|
||||
flags &= ~(SIGNOK|PFXOK|NDIGITS);
|
||||
goto ok;
|
||||
|
||||
/* 1 through 7 always legal */
|
||||
case '1': case '2': case '3':
|
||||
case '4': case '5': case '6': case '7':
|
||||
base = basefix[base];
|
||||
flags &= ~(SIGNOK | PFXOK | NDIGITS);
|
||||
goto ok;
|
||||
|
||||
/* digits 8 and 9 ok iff decimal or hex */
|
||||
case '8': case '9':
|
||||
base = basefix[base];
|
||||
if (base <= 8)
|
||||
break; /* not legal here */
|
||||
flags &= ~(SIGNOK | PFXOK | NDIGITS);
|
||||
goto ok;
|
||||
|
||||
/* letters ok iff hex */
|
||||
case 'A': case 'B': case 'C':
|
||||
case 'D': case 'E': case 'F':
|
||||
case 'a': case 'b': case 'c':
|
||||
case 'd': case 'e': case 'f':
|
||||
/* no need to fix base here */
|
||||
if (base <= 10)
|
||||
break; /* not legal here */
|
||||
flags &= ~(SIGNOK | PFXOK | NDIGITS);
|
||||
goto ok;
|
||||
|
||||
/* sign ok only as first character */
|
||||
case '+': case '-':
|
||||
if (flags & SIGNOK) {
|
||||
flags &= ~SIGNOK;
|
||||
goto ok;
|
||||
}
|
||||
break;
|
||||
|
||||
/* x ok iff flag still set & 2nd char */
|
||||
case 'x': case 'X':
|
||||
if (flags & PFXOK && p == buf + 1) {
|
||||
base = 16; /* if %i */
|
||||
flags &= ~PFXOK;
|
||||
goto ok;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* If we got here, c is not a legal character
|
||||
* for a number. Stop accumulating digits.
|
||||
*/
|
||||
if (c != WEOF)
|
||||
__ungetwc(c, fp);
|
||||
break;
|
||||
ok:
|
||||
/*
|
||||
* c is legal: store it and look at the next.
|
||||
*/
|
||||
*p++ = (wchar_t)c;
|
||||
}
|
||||
/*
|
||||
* If we had only a sign, it is no good; push
|
||||
* back the sign. If the number ends in `x',
|
||||
* it was [sign] '0' 'x', so push back the x
|
||||
* and treat it as [sign] '0'.
|
||||
*/
|
||||
if (flags & NDIGITS) {
|
||||
if (p > buf)
|
||||
__ungetwc(*--p, fp);
|
||||
goto match_failure;
|
||||
}
|
||||
c = p[-1];
|
||||
if (c == 'x' || c == 'X') {
|
||||
--p;
|
||||
__ungetwc(c, fp);
|
||||
}
|
||||
if ((flags & SUPPRESS) == 0) {
|
||||
uintmax_t res;
|
||||
|
||||
*p = 0;
|
||||
if ((flags & UNSIGNED) == 0)
|
||||
res = wcstoimax(buf, NULL, base);
|
||||
else
|
||||
res = wcstoumax(buf, NULL, base);
|
||||
if (flags & POINTER)
|
||||
*va_arg(ap, void **) =
|
||||
(void *)(uintptr_t)res;
|
||||
else if (flags & SHORTSHORT)
|
||||
*va_arg(ap, char *) = res;
|
||||
else if (flags & SHORT)
|
||||
*va_arg(ap, short *) = res;
|
||||
else if (flags & LONG)
|
||||
*va_arg(ap, long *) = res;
|
||||
else if (flags & LONGLONG)
|
||||
*va_arg(ap, long long *) = res;
|
||||
else if (flags & INTMAXT)
|
||||
*va_arg(ap, intmax_t *) = res;
|
||||
else if (flags & PTRDIFFT)
|
||||
*va_arg(ap, ptrdiff_t *) = res;
|
||||
else if (flags & SIZET)
|
||||
*va_arg(ap, size_t *) = res;
|
||||
else
|
||||
*va_arg(ap, int *) = res;
|
||||
nassigned++;
|
||||
}
|
||||
nread += p - buf;
|
||||
nconversions++;
|
||||
break;
|
||||
|
||||
#ifdef FLOATING_POINT
|
||||
case CT_FLOAT:
|
||||
/* scan a floating point number as if by strtod */
|
||||
#ifdef hardway
|
||||
if (width == 0 || width > sizeof(buf) - 1)
|
||||
width = sizeof(buf) - 1;
|
||||
#else
|
||||
/* size_t is unsigned, hence this optimisation */
|
||||
if (--width > sizeof(buf) - 2)
|
||||
width = sizeof(buf) - 2;
|
||||
width++;
|
||||
#endif
|
||||
flags |= SIGNOK | NDIGITS | DPTOK | EXPOK;
|
||||
for (p = buf; width; width--) {
|
||||
c = __fgetwc(fp);
|
||||
/*
|
||||
* This code mimicks the integer conversion
|
||||
* code, but is much simpler.
|
||||
*/
|
||||
switch (c) {
|
||||
|
||||
case '0': case '1': case '2': case '3':
|
||||
case '4': case '5': case '6': case '7':
|
||||
case '8': case '9':
|
||||
flags &= ~(SIGNOK | NDIGITS);
|
||||
goto fok;
|
||||
|
||||
case '+': case '-':
|
||||
if (flags & SIGNOK) {
|
||||
flags &= ~SIGNOK;
|
||||
goto fok;
|
||||
}
|
||||
break;
|
||||
case 'e': case 'E':
|
||||
/* no exponent without some digits */
|
||||
if ((flags&(NDIGITS|EXPOK)) == EXPOK) {
|
||||
flags =
|
||||
(flags & ~(EXPOK|DPTOK)) |
|
||||
SIGNOK | NDIGITS;
|
||||
goto fok;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
if (c == (wchar_t)decimal_point &&
|
||||
(flags & DPTOK)) {
|
||||
flags &= ~(SIGNOK | DPTOK);
|
||||
goto fok;
|
||||
}
|
||||
break;
|
||||
}
|
||||
if (c != WEOF)
|
||||
__ungetwc(c, fp);
|
||||
break;
|
||||
fok:
|
||||
*p++ = c;
|
||||
}
|
||||
/*
|
||||
* If no digits, might be missing exponent digits
|
||||
* (just give back the exponent) or might be missing
|
||||
* regular digits, but had sign and/or decimal point.
|
||||
*/
|
||||
if (flags & NDIGITS) {
|
||||
if (flags & EXPOK) {
|
||||
/* no digits at all */
|
||||
while (p > buf)
|
||||
__ungetwc(*--p, fp);
|
||||
goto match_failure;
|
||||
}
|
||||
/* just a bad exponent (e and maybe sign) */
|
||||
c = *--p;
|
||||
if (c != 'e' && c != 'E') {
|
||||
__ungetwc(c, fp);/* sign */
|
||||
c = *--p;
|
||||
}
|
||||
__ungetwc(c, fp);
|
||||
}
|
||||
if ((flags & SUPPRESS) == 0) {
|
||||
double res;
|
||||
|
||||
*p = 0;
|
||||
/* XXX this loses precision for long doubles. */
|
||||
res = wcstod(buf, NULL);
|
||||
if (flags & LONGDBL)
|
||||
*va_arg(ap, long double *) = res;
|
||||
else if (flags & LONG)
|
||||
*va_arg(ap, double *) = res;
|
||||
else
|
||||
*va_arg(ap, float *) = res;
|
||||
nassigned++;
|
||||
}
|
||||
nread += p - buf;
|
||||
nconversions++;
|
||||
break;
|
||||
#endif /* FLOATING_POINT */
|
||||
}
|
||||
}
|
||||
input_failure:
|
||||
return (nconversions != 0 ? nassigned : EOF);
|
||||
match_failure:
|
||||
return (nassigned);
|
||||
}
|
98
lib/libc/stdio/vswscanf.c
Normal file
98
lib/libc/stdio/vswscanf.c
Normal file
|
@ -0,0 +1,98 @@
|
|||
/*-
|
||||
* Copyright (c) 1990, 1993
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to Berkeley by
|
||||
* Donn Seeley at UUNET Technologies, Inc.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the University of
|
||||
* California, Berkeley and its contributors.
|
||||
* 4. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
#if 0
|
||||
#if defined(LIBC_SCCS) && !defined(lint)
|
||||
static char sccsid[] = "@(#)vsscanf.c 8.1 (Berkeley) 6/4/93";
|
||||
#endif /* LIBC_SCCS and not lint */
|
||||
__FBSDID("FreeBSD: src/lib/libc/stdio/vsscanf.c,v 1.11 2002/08/21 16:19:57 mike Exp ");
|
||||
#endif
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <limits.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <wchar.h>
|
||||
#include "local.h"
|
||||
|
||||
static int eofread(void *, char *, int);
|
||||
|
||||
static int
|
||||
eofread(void *cookie, char *buf, int len)
|
||||
{
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
|
||||
va_list ap)
|
||||
{
|
||||
FILE f;
|
||||
mbstate_t mbs;
|
||||
struct __sFILEX ext;
|
||||
char *mbstr;
|
||||
size_t mlen;
|
||||
int r;
|
||||
|
||||
/*
|
||||
* XXX Convert the wide character string to multibyte, which
|
||||
* __vfwscanf() will convert back to wide characters.
|
||||
*/
|
||||
if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
|
||||
return (EOF);
|
||||
memset(&mbs, 0, sizeof(mbs));
|
||||
if ((mlen = wcsrtombs(mbstr, &str, SIZE_T_MAX, &mbs)) == (size_t)-1) {
|
||||
free(mbstr);
|
||||
return (EOF);
|
||||
}
|
||||
f._file = -1;
|
||||
f._flags = __SRD;
|
||||
f._bf._base = f._p = (unsigned char *)mbstr;
|
||||
f._bf._size = f._r = mlen;
|
||||
f._read = eofread;
|
||||
f._ub._base = NULL;
|
||||
f._lb._base = NULL;
|
||||
f._extra = &ext;
|
||||
INITEXTRA(&f);
|
||||
r = __vfwscanf(&f, fmt, ap);
|
||||
free(mbstr);
|
||||
|
||||
return (r);
|
||||
}
|
39
lib/libc/stdio/vwscanf.c
Normal file
39
lib/libc/stdio/vwscanf.c
Normal file
|
@ -0,0 +1,39 @@
|
|||
/*-
|
||||
* Copyright (c) 2002 Tim J. Robbins
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <stdarg.h>
|
||||
#include <stdio.h>
|
||||
#include <wchar.h>
|
||||
|
||||
int
|
||||
vwscanf(const wchar_t * __restrict fmt, va_list ap)
|
||||
{
|
||||
|
||||
return (vfwscanf(stdin, fmt, ap));
|
||||
}
|
497
lib/libc/stdio/wscanf.3
Normal file
497
lib/libc/stdio/wscanf.3
Normal file
|
@ -0,0 +1,497 @@
|
|||
.\" Copyright (c) 1990, 1991, 1993
|
||||
.\" The Regents of the University of California. All rights reserved.
|
||||
.\"
|
||||
.\" This code is derived from software contributed to Berkeley by
|
||||
.\" Chris Torek and the American National Standards Committee X3,
|
||||
.\" on Information Processing Systems.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\" 3. All advertising materials mentioning features or use of this software
|
||||
.\" must display the following acknowledgement:
|
||||
.\" This product includes software developed by the University of
|
||||
.\" California, Berkeley and its contributors.
|
||||
.\" 4. Neither the name of the University nor the names of its contributors
|
||||
.\" may be used to endorse or promote products derived from this software
|
||||
.\" without specific prior written permission.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
.\" SUCH DAMAGE.
|
||||
.\"
|
||||
.\" @(#)scanf.3 8.2 (Berkeley) 12/11/93
|
||||
.\" FreeBSD: src/lib/libc/stdio/scanf.3,v 1.17 2002/05/30 09:53:47 ru Exp
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.Dd September 22, 2002
|
||||
.Dt WSCANF 3
|
||||
.Os
|
||||
.Sh NAME
|
||||
.Nm wscanf ,
|
||||
.Nm fwscanf ,
|
||||
.Nm swscanf ,
|
||||
.Nm vwscanf ,
|
||||
.Nm vswscanf ,
|
||||
.Nm vfwscanf
|
||||
.Nd wide character input format conversion
|
||||
.Sh LIBRARY
|
||||
.Lb libc
|
||||
.Sh SYNOPSIS
|
||||
.In stdio.h
|
||||
.In wchar.h
|
||||
.Ft int
|
||||
.Fn wscanf "const wchar_t * restrict format" ...
|
||||
.Ft int
|
||||
.Fn fwscanf "FILE * restrict stream" "const wchar_t * restrict format" ...
|
||||
.Ft int
|
||||
.Fn swscanf "const wchar_t * restrict str" "const wchar_t * restrict format" ...
|
||||
.In stdarg.h
|
||||
.Ft int
|
||||
.Fn vwscanf "const wchar_t * restrict format" "va_list ap"
|
||||
.Ft int
|
||||
.Fn vswscanf "const wchar_t * restrict str" "const wchar_t * restrict format" "va_list ap"
|
||||
.Ft int
|
||||
.Fn vfwscanf "FILE * restrict stream" "const wchar_t * restrict format" "va_list ap"
|
||||
.Sh DESCRIPTION
|
||||
The
|
||||
.Fn wscanf
|
||||
family of functions scans input according to a
|
||||
.Fa format
|
||||
as described below.
|
||||
This format may contain
|
||||
.Em conversion specifiers ;
|
||||
the results from such conversions, if any,
|
||||
are stored through the
|
||||
.Em pointer
|
||||
arguments.
|
||||
The
|
||||
.Fn wscanf
|
||||
function
|
||||
reads input from the standard input stream
|
||||
.Em stdin ,
|
||||
.Fn fwscanf
|
||||
reads input from the stream pointer
|
||||
.Fa stream ,
|
||||
and
|
||||
.Fn swscanf
|
||||
reads its input from the wide character string pointed to by
|
||||
.Fa str .
|
||||
The
|
||||
.Fn vfwscanf
|
||||
function
|
||||
is analogous to
|
||||
.Xr vfwprintf 3
|
||||
and reads input from the stream pointer
|
||||
.Fa stream
|
||||
using a variable argument list of pointers (see
|
||||
.Xr stdarg 3 ) .
|
||||
The
|
||||
.Fn vwscanf
|
||||
function scans a variable argument list from the standard input and
|
||||
the
|
||||
.Fn vswscanf
|
||||
function scans it from a wide character string;
|
||||
these are analogous to
|
||||
the
|
||||
.Fn vwprintf
|
||||
and
|
||||
.Fn vswprintf
|
||||
functions respectively.
|
||||
Each successive
|
||||
.Em pointer
|
||||
argument must correspond properly with
|
||||
each successive conversion specifier
|
||||
(but see the
|
||||
.Cm *
|
||||
conversion below).
|
||||
All conversions are introduced by the
|
||||
.Cm %
|
||||
(percent sign) character.
|
||||
The
|
||||
.Fa format
|
||||
string
|
||||
may also contain other characters.
|
||||
White space (such as blanks, tabs, or newlines) in the
|
||||
.Fa format
|
||||
string match any amount of white space, including none, in the input.
|
||||
Everything else
|
||||
matches only itself.
|
||||
Scanning stops
|
||||
when an input character does not match such a format character.
|
||||
Scanning also stops
|
||||
when an input conversion cannot be made (see below).
|
||||
.Sh CONVERSIONS
|
||||
Following the
|
||||
.Cm %
|
||||
character introducing a conversion
|
||||
there may be a number of
|
||||
.Em flag
|
||||
characters, as follows:
|
||||
.Bl -tag -width ".Cm l No (ell)"
|
||||
.It Cm *
|
||||
Suppresses assignment.
|
||||
The conversion that follows occurs as usual, but no pointer is used;
|
||||
the result of the conversion is simply discarded.
|
||||
.It Cm hh
|
||||
Indicates that the conversion will be one of
|
||||
.Cm dioux
|
||||
or
|
||||
.Cm n
|
||||
and the next pointer is a pointer to a
|
||||
.Vt char
|
||||
(rather than
|
||||
.Vt int ) .
|
||||
.It Cm h
|
||||
Indicates that the conversion will be one of
|
||||
.Cm dioux
|
||||
or
|
||||
.Cm n
|
||||
and the next pointer is a pointer to a
|
||||
.Vt "short int"
|
||||
(rather than
|
||||
.Vt int ) .
|
||||
.It Cm l No (ell)
|
||||
Indicates that the conversion will be one of
|
||||
.Cm dioux
|
||||
or
|
||||
.Cm n
|
||||
and the next pointer is a pointer to a
|
||||
.Vt "long int"
|
||||
(rather than
|
||||
.Vt int ) ,
|
||||
that the conversion will be one of
|
||||
.Cm aefg
|
||||
and the next pointer is a pointer to
|
||||
.Vt double
|
||||
(rather than
|
||||
.Vt float ) ,
|
||||
or that the conversion will be one of
|
||||
.Cm c
|
||||
or
|
||||
.Cm s
|
||||
and the next pointer is a pointer to an array of
|
||||
.Vt wchar_t
|
||||
(rather than
|
||||
.Vt char ) .
|
||||
.It Cm ll No (ell ell)
|
||||
Indicates that the conversion will be one of
|
||||
.Cm dioux
|
||||
or
|
||||
.Cm n
|
||||
and the next pointer is a pointer to a
|
||||
.Vt "long long int"
|
||||
(rather than
|
||||
.Vt int ) .
|
||||
.It Cm L
|
||||
Indicates that the conversion will be one of
|
||||
.Cm aef
|
||||
or
|
||||
.Cm g
|
||||
and the next pointer is a pointer to
|
||||
.Vt "long double" .
|
||||
(This type is not implemented; although the argument is
|
||||
required to be a pointer to
|
||||
.Vt "long double" ,
|
||||
no additional precision is used in the conversion.)
|
||||
.It Cm j
|
||||
Indicates that the conversion will be one of
|
||||
.Cm dioux
|
||||
or
|
||||
.Cm n
|
||||
and the next pointer is a pointer to a
|
||||
.Vt intmax_t
|
||||
(rather than
|
||||
.Vt int ) .
|
||||
.It Cm t
|
||||
Indicates that the conversion will be one of
|
||||
.Cm dioux
|
||||
or
|
||||
.Cm n
|
||||
and the next pointer is a pointer to a
|
||||
.Vt ptrdiff_t
|
||||
(rather than
|
||||
.Vt int ) .
|
||||
.It Cm z
|
||||
Indicates that the conversion will be one of
|
||||
.Cm dioux
|
||||
or
|
||||
.Cm n
|
||||
and the next pointer is a pointer to a
|
||||
.Vt size_t
|
||||
(rather than
|
||||
.Vt int ) .
|
||||
.It Cm q
|
||||
(deprecated.)
|
||||
Indicates that the conversion will be one of
|
||||
.Cm dioux
|
||||
or
|
||||
.Cm n
|
||||
and the next pointer is a pointer to a
|
||||
.Vt "long long int"
|
||||
(rather than
|
||||
.Vt int ) .
|
||||
.El
|
||||
.Pp
|
||||
In addition to these flags,
|
||||
there may be an optional maximum field width,
|
||||
expressed as a decimal integer,
|
||||
between the
|
||||
.Cm %
|
||||
and the conversion.
|
||||
If no width is given,
|
||||
a default of
|
||||
.Dq infinity
|
||||
is used (with one exception, below);
|
||||
otherwise at most this many characters are scanned
|
||||
in processing the conversion.
|
||||
Before conversion begins,
|
||||
most conversions skip white space;
|
||||
this white space is not counted against the field width.
|
||||
.Pp
|
||||
The following conversions are available:
|
||||
.Bl -tag -width XXXX
|
||||
.It Cm %
|
||||
Matches a literal
|
||||
.Ql % .
|
||||
That is,
|
||||
.Dq Li %%
|
||||
in the format string
|
||||
matches a single input
|
||||
.Ql %
|
||||
character.
|
||||
No conversion is done, and assignment does not occur.
|
||||
.It Cm d
|
||||
Matches an optionally signed decimal integer;
|
||||
the next pointer must be a pointer to
|
||||
.Vt int .
|
||||
.It Cm i
|
||||
Matches an optionally signed integer;
|
||||
the next pointer must be a pointer to
|
||||
.Vt int .
|
||||
The integer is read in base 16 if it begins
|
||||
with
|
||||
.Ql 0x
|
||||
or
|
||||
.Ql 0X ,
|
||||
in base 8 if it begins with
|
||||
.Ql 0 ,
|
||||
and in base 10 otherwise.
|
||||
Only characters that correspond to the base are used.
|
||||
.It Cm o
|
||||
Matches an octal integer;
|
||||
the next pointer must be a pointer to
|
||||
.Vt "unsigned int" .
|
||||
.It Cm u
|
||||
Matches an optionally signed decimal integer;
|
||||
the next pointer must be a pointer to
|
||||
.Vt "unsigned int" .
|
||||
.It Cm x , X
|
||||
Matches an optionally signed hexadecimal integer;
|
||||
the next pointer must be a pointer to
|
||||
.Vt "unsigned int" .
|
||||
.It Cm e , E , f , F , g , G
|
||||
Matches an optionally signed floating-point number;
|
||||
the next pointer must be a pointer to
|
||||
.Vt float .
|
||||
.It Cm a , A
|
||||
Matches a hexadecimal number represented in the style
|
||||
.Sm off
|
||||
.Oo \- Oc Li 0x Ar h Li \&. Ar hhh Cm p Oo \\*[Pm] Oc Ar d .
|
||||
.Sm on
|
||||
This is an exact conversion of the sign, exponent, mantissa internal
|
||||
floating point representation; the
|
||||
.Sm off
|
||||
.Oo \- Oc Li 0x Ar h Li \&. Ar hhh
|
||||
.Sm on
|
||||
portion represents exactly the mantissa; only denormalized
|
||||
mantissas have a zero value to the left of the hexadecimal
|
||||
point.
|
||||
The
|
||||
.Cm p
|
||||
is a literal character
|
||||
.Ql p ;
|
||||
the exponent is preceded by a positive or negative sign
|
||||
and is represented in decimal.
|
||||
.It Cm s
|
||||
Matches a sequence of non-white-space wide characters;
|
||||
the next pointer must be a pointer to
|
||||
.Vt char ,
|
||||
and the array must be large enough to accept the multibyte representation
|
||||
of all the sequence and the
|
||||
terminating
|
||||
.Dv NUL
|
||||
character.
|
||||
The input string stops at white space
|
||||
or at the maximum field width, whichever occurs first.
|
||||
.Pp
|
||||
If an
|
||||
.Cm l
|
||||
qualifier is present, the next pointer must be a pointer to
|
||||
.Vt wchar_t ,
|
||||
into which the input will be placed.
|
||||
.It Cm S
|
||||
The same as
|
||||
.Cm ls .
|
||||
.It Cm c
|
||||
Matches a sequence of
|
||||
.Em width
|
||||
count
|
||||
wide characters (default 1);
|
||||
the next pointer must be a pointer to
|
||||
.Vt char ,
|
||||
and there must be enough room for the multibyte representation
|
||||
of all the characters
|
||||
(no terminating
|
||||
.Dv NUL
|
||||
is added).
|
||||
The usual skip of leading white space is suppressed.
|
||||
To skip white space first, use an explicit space in the format.
|
||||
.Pp
|
||||
If an
|
||||
.Cm l
|
||||
qualifier is present, the next pointer must be a pointer to
|
||||
.Vt wchar_t ,
|
||||
into which the input will be placed.
|
||||
.It Cm C
|
||||
The same as
|
||||
.Cm lc .
|
||||
.It Cm \&[
|
||||
Matches a nonempty sequence of characters from the specified set
|
||||
of accepted characters;
|
||||
the next pointer must be a pointer to
|
||||
.Vt char ,
|
||||
and there must be enough room for the multibyte representation of
|
||||
all the characters in the string,
|
||||
plus a terminating
|
||||
.Dv NUL
|
||||
character.
|
||||
The usual skip of leading white space is suppressed.
|
||||
The string is to be made up of characters in
|
||||
(or not in)
|
||||
a particular set;
|
||||
the set is defined by the characters between the open bracket
|
||||
.Cm [
|
||||
character
|
||||
and a close bracket
|
||||
.Cm ]
|
||||
character.
|
||||
The set
|
||||
.Em excludes
|
||||
those characters
|
||||
if the first character after the open bracket is a circumflex
|
||||
.Cm ^ .
|
||||
To include a close bracket in the set,
|
||||
make it the first character after the open bracket
|
||||
or the circumflex;
|
||||
any other position will end the set.
|
||||
To include a hyphen in the set,
|
||||
make it the last character before the final close bracket;
|
||||
some implementations of
|
||||
.Fn wscanf
|
||||
use
|
||||
.Dq A-Z
|
||||
to represent the range of characters between
|
||||
.Dq A
|
||||
and
|
||||
.Dq Z .
|
||||
The string ends with the appearance of a character not in the
|
||||
(or, with a circumflex, in) set
|
||||
or when the field width runs out.
|
||||
.Pp
|
||||
If an
|
||||
.Cm l
|
||||
qualifier is present, the next pointer must be a pointer to
|
||||
.Vt wchar_t ,
|
||||
into which the input will be placed.
|
||||
.It Cm p
|
||||
Matches a pointer value (as printed by
|
||||
.Ql %p
|
||||
in
|
||||
.Xr wprintf 3 ) ;
|
||||
the next pointer must be a pointer to
|
||||
.Vt void .
|
||||
.It Cm n
|
||||
Nothing is expected;
|
||||
instead, the number of characters consumed thus far from the input
|
||||
is stored through the next pointer,
|
||||
which must be a pointer to
|
||||
.Vt int .
|
||||
This is
|
||||
.Em not
|
||||
a conversion, although it can be suppressed with the
|
||||
.Cm *
|
||||
flag.
|
||||
.El
|
||||
.Pp
|
||||
The decimal point
|
||||
character is defined in the program's locale (category
|
||||
.Dv LC_NUMERIC ) .
|
||||
.Pp
|
||||
For backwards compatibility, a
|
||||
.Dq conversion
|
||||
of
|
||||
.Ql %\e0
|
||||
causes an immediate return of
|
||||
.Dv EOF .
|
||||
.Sh RETURN VALUES
|
||||
These
|
||||
functions
|
||||
return
|
||||
the number of input items assigned, which can be fewer than provided
|
||||
for, or even zero, in the event of a matching failure.
|
||||
Zero
|
||||
indicates that, while there was input available,
|
||||
no conversions were assigned;
|
||||
typically this is due to an invalid input character,
|
||||
such as an alphabetic character for a
|
||||
.Ql %d
|
||||
conversion.
|
||||
The value
|
||||
.Dv EOF
|
||||
is returned if an input failure occurs before any conversion such as an
|
||||
end-of-file occurs.
|
||||
If an error or end-of-file occurs after conversion
|
||||
has begun,
|
||||
the number of conversions which were successfully completed is returned.
|
||||
.Sh SEE ALSO
|
||||
.Xr fgetwc 3 ,
|
||||
.Xr wcrtomb 3 ,
|
||||
.Xr wcstod 3 ,
|
||||
.Xr wcstol 3 ,
|
||||
.Xr wcstoul 3 ,
|
||||
.Xr wprintf 3
|
||||
.Sh STANDARDS
|
||||
The
|
||||
.Fn fwscanf ,
|
||||
.Fn wscanf ,
|
||||
.Fn swscanf ,
|
||||
.Fn vfwscanf ,
|
||||
.Fn vwscanf
|
||||
and
|
||||
.Fn vswscanf
|
||||
functions
|
||||
conform to
|
||||
.St -isoC-99 .
|
||||
.Sh BUGS
|
||||
In addition to the bugs documented in
|
||||
.Xr scanf 3 ,
|
||||
.Fn wscanf
|
||||
does not support the
|
||||
.Dq A-Z
|
||||
notation for specifying character ranges with the character
|
||||
class conversion
|
||||
.Pq Sq Cm %[ .
|
45
lib/libc/stdio/wscanf.c
Normal file
45
lib/libc/stdio/wscanf.c
Normal file
|
@ -0,0 +1,45 @@
|
|||
/*-
|
||||
* Copyright (c) 2002 Tim J. Robbins
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <stdarg.h>
|
||||
#include <stdio.h>
|
||||
#include <wchar.h>
|
||||
|
||||
int
|
||||
wscanf(const wchar_t * __restrict fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
int r;
|
||||
|
||||
va_start(ap, fmt);
|
||||
r = vfwscanf(stdin, fmt, ap);
|
||||
va_end(ap);
|
||||
|
||||
return (r);
|
||||
}
|
Loading…
Reference in a new issue