d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add implementations of wscanf() and related functions: fwscanf(), swscanf(),

Browse Source 
vfwscanf(), vswscanf(), vwscanf(). As the name suggests, these are wide-
character versions of the scanf() family of functions.
This commit is contained in:
Tim J. Robbins 2002-09-23 12:40:06 +00:00
parent f50b861cbf
commit 1f4ff8506a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=103856
10 changed files with 1538 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/wchar.h
View File

@ -112,6 +112,7 @@ wint_t fputwc(wchar_t, struct __sFILE *);
int fputws(const wchar_t * __restrict, struct __sFILE * __restrict);
int fwide(struct __sFILE *, int);
int fwprintf(struct __sFILE * __restrict, const wchar_t * __restrict, ...);
int fwscanf(struct __sFILE * __restrict, const wchar_t * __restrict, ...);
wint_t getwc(struct __sFILE *);
wint_t getwchar(void);
size_t mbrlen(const char * __restrict, size_t, mbstate_t * __restrict);
@ -124,12 +125,18 @@ wint_t putwc(wchar_t, struct __sFILE *);
wint_t putwchar(wchar_t);
int swprintf(wchar_t * __restrict, size_t n, const wchar_t * __restrict,
...);
int swscanf(const wchar_t * __restrict, const wchar_t * __restrict, ...);
wint_t ungetwc(wint_t, struct __sFILE *);
int vfwprintf(struct __sFILE * __restrict, const wchar_t * __restrict,
__va_list);
int vfwscanf(struct __sFILE * __restrict, const wchar_t * __restrict,
__va_list);
int vswprintf(wchar_t * __restrict, size_t n, const wchar_t * __restrict,
__va_list);
int vswscanf(const wchar_t * __restrict, const wchar_t * __restrict,
__va_list);
int vwprintf(const wchar_t * __restrict, __va_list);
int vwscanf(const wchar_t * __restrict, __va_list);
size_t wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
wchar_t *wcscat(wchar_t * __restrict, const wchar_t * __restrict);
wchar_t *wcschr(const wchar_t *, wchar_t);
@ -166,6 +173,7 @@ wchar_t *wmemcpy(wchar_t * __restrict, const wchar_t * __restrict, size_t);
wchar_t *wmemmove(wchar_t *, const wchar_t *, size_t);
wchar_t *wmemset(wchar_t *, wchar_t, size_t);
int wprintf(const wchar_t * __restrict, ...);
int wscanf(const wchar_t * __restrict, ...);
#if __XSI_VISIBLE
int wcswidth(const wchar_t *, size_t);

17
lib/libc/stdio/Makefile.inc
View File

@ -8,21 +8,24 @@ SRCS+= _flock_stub.c asprintf.c clrerr.c fclose.c fdopen.c feof.c ferror.c \
fflush.c fgetc.c fgetln.c fgetpos.c fgets.c fgetwc.c fgetws.c \
fileno.c findfp.c flags.c fopen.c fprintf.c fpurge.c fputc.c fputs.c \
fputwc.c fputws.c fread.c freopen.c fscanf.c fseek.c fsetpos.c \
ftell.c funopen.c fvwrite.c fwalk.c fwide.c fwprintf.c fwrite.c getc.c \
ftell.c funopen.c fvwrite.c fwalk.c fwide.c fwprintf.c fwscanf.c \
fwrite.c getc.c \
getchar.c gets.c getw.c getwc.c getwchar.c makebuf.c mktemp.c \
perror.c printf.c putc.c putchar.c puts.c putw.c putwc.c putwchar.c \
refill.c remove.c rewind.c rget.c scanf.c setbuf.c setbuffer.c \
setvbuf.c snprintf.c sprintf.c sscanf.c stdio.c swprintf.c tempnam.c \
tmpfile.c \
setvbuf.c snprintf.c sprintf.c sscanf.c stdio.c swprintf.c swscanf.c \
tempnam.c tmpfile.c \
tmpnam.c ungetc.c ungetwc.c vasprintf.c vfprintf.c vfscanf.c \
vfwprintf.c vprintf.c vscanf.c vsnprintf.c vsprintf.c vsscanf.c \
vswprintf.c vwprintf.c wbuf.c wprintf.c wsetup.c
vfwprintf.c vfwscanf.c vprintf.c vscanf.c vsnprintf.c vsprintf.c \
vsscanf.c \
vswprintf.c vswscanf.c vwprintf.c vwscanf.c wbuf.c wprintf.c wscanf.c \
wsetup.c
.if ${LIB} == "c"
MAN+= fclose.3 ferror.3 fflush.3 fgetln.3 fgets.3 fgetws.3 fopen.3 fputs.3 \
fputws.3 fread.3 fseek.3 funopen.3 fwide.3 getc.3 getwc.3 mktemp.3 \
printf.3 putc.3 putwc.3 remove.3 scanf.3 setbuf.3 stdio.3 tmpnam.3 \
ungetc.3 ungetwc.3 wprintf.3
ungetc.3 ungetwc.3 wprintf.3 wscanf.3
MLINKS+=ferror.3 clearerr.3 ferror.3 feof.3 ferror.3 fileno.3
MLINKS+=fflush.3 fpurge.3
@ -49,4 +52,6 @@ MLINKS+=setbuf.3 setbuffer.3 setbuf.3 setlinebuf.3 setbuf.3 setvbuf.3
MLINKS+=tmpnam.3 tempnam.3 tmpnam.3 tmpfile.3
MLINKS+=wprintf.3 fwprintf.3 wprintf.3 swprintf.3 \
wprintf.3 vwprintf.3 wprintf.3 vfwprintf.3 wprintf.3 vswprintf.3
MLINKS+=wscanf.3 fwscanf.3 wscanf.3 swscanf.3 wscanf.3 vwscanf.3 \
wscanf.3 vswscanf.3 wscanf.3 vfwscanf.3
.endif

45
lib/libc/stdio/fwscanf.c Normal file
View 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
fwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, ...)
{
va_list ap;
int r;
va_start(ap, fmt);
r = vfwscanf(fp, fmt, ap);
va_end(ap);
return (r);
}

2
lib/libc/stdio/local.h
View File

@ -74,6 +74,8 @@ extern int __ungetc(int, FILE *);
extern wint_t __ungetwc(wint_t, FILE *);
extern int __vfprintf(FILE *, const char *, __va_list);
extern int __vfwprintf(FILE *, const wchar_t *, __va_list);
extern int __vfwscanf(FILE * __restrict, const wchar_t * __restrict,
__va_list);
extern int __sdidinit;

45
lib/libc/stdio/swscanf.c Normal file
View 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
swscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt, ...)
{
va_list ap;
int r;
va_start(ap, fmt);
r = vswscanf(str, fmt, ap);
va_end(ap);
return (r);
}

748
lib/libc/stdio/vfwscanf.c Normal file
View File

@ -0,0 +1,748 @@
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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[] = "@(#)vfscanf.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
__FBSDID("FreeBSD: src/lib/libc/stdio/vfscanf.c,v 1.24 2002/08/13 09:30:41 tjr Exp ");
#endif
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <ctype.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include "un-namespace.h"
#include "libc_private.h"
#include "local.h"
#define FLOATING_POINT
#ifdef FLOATING_POINT
#include <locale.h>
#include "floatio.h"
#endif
#define BUF 513 /* Maximum length of numeric string. */
/*
* Flags used during conversion.
*/
#define LONG 0x01 /* l: long or double */
#define LONGDBL 0x02 /* L: long double */
#define SHORT 0x04 /* h: short */
#define SUPPRESS 0x08 /* *: suppress assignment */
#define POINTER 0x10 /* p: void * (as hex) */
#define NOSKIP 0x20 /* [ or c: do not skip blanks */
#define LONGLONG 0x400 /* ll: long long (+ deprecated q: quad) */
#define INTMAXT 0x800 /* j: intmax_t */
#define PTRDIFFT 0x1000 /* t: ptrdiff_t */
#define SIZET 0x2000 /* z: size_t */
#define SHORTSHORT 0x4000 /* hh: char */
#define UNSIGNED 0x8000 /* %[oupxX] conversions */
/*
* The following are used in numeric conversions only:
* SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point;
* SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral.
*/
#define SIGNOK 0x40 /* +/- is (still) legal */
#define NDIGITS 0x80 /* no digits detected */
#define DPTOK 0x100 /* (float) decimal point is still legal */
#define EXPOK 0x200 /* (float) exponent (e+3, etc) still legal */
#define PFXOK 0x100 /* 0x prefix is (still) legal */
#define NZDIGITS 0x200 /* no zero digits detected */
/*
* Conversion types.
*/
#define CT_CHAR 0 /* %c conversion */
#define CT_CCL 1 /* %[...] conversion */
#define CT_STRING 2 /* %s conversion */
#define CT_INT 3 /* %[dioupxX] conversion */
#define CT_FLOAT 4 /* %[efgEFG] conversion */
#define INCCL(_c) \
(cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL) : \
(wmemchr(ccls, (_c), ccle - ccls) != NULL))
/*
* MT-safe version.
*/
int
vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, va_list ap)
{
int ret;
FLOCKFILE(fp);
ORIENT(fp, 1);
ret = __vfwscanf(fp, fmt, ap);
FUNLOCKFILE(fp);
return (ret);
}
/*
* Non-MT-safe version.
*/
int
__vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, va_list ap)
{
wint_t c; /* character from format, or conversion */
size_t width; /* field width, or 0 */
wchar_t *p; /* points into all kinds of strings */
int n; /* handy integer */
int flags; /* flags as defined above */
wchar_t *p0; /* saves original value of p when necessary */
int nassigned; /* number of fields assigned */
int nconversions; /* number of conversions */
int nread; /* number of characters consumed from fp */
int base; /* base argument to conversion function */
wchar_t buf[BUF]; /* buffer for numeric conversions */
const wchar_t *ccls; /* character class start */
const wchar_t *ccle; /* character class end */
int cclcompl; /* ccl is complemented? */
wint_t wi; /* handy wint_t */
char *mbp; /* multibyte string pointer for %c %s %[ */
size_t nconv; /* number of bytes in mb. conversion */
mbstate_t mbs; /* multibyte state */
/* `basefix' is used to avoid `if' tests in the integer scanner */
static short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
#ifdef FLOATING_POINT
char decimal_point = localeconv()->decimal_point[0];
#endif
nassigned = 0;
nconversions = 0;
nread = 0;
ccls = ccle = NULL;
for (;;) {
c = *fmt++;
if (c == 0)
return (nassigned);
if (iswspace(c)) {
while ((c = __fgetwc(fp)) != WEOF &&
iswspace(c))
;
if (c != WEOF)
__ungetwc(c, fp);
continue;
}
if (c != '%')
goto literal;
width = 0;
flags = 0;
/*
* switch on the format. continue if done;
* break once format type is derived.
*/
again: c = *fmt++;
switch (c) {
case '%':
literal:
if ((wi = __fgetwc(fp)) == WEOF)
goto input_failure;
if (wi != c) {
__ungetwc(wi, fp);
goto input_failure;
}
nread++;
continue;
case '*':
flags |= SUPPRESS;
goto again;
case 'j':
flags |= INTMAXT;
goto again;
case 'l':
if (flags & LONG) {
flags &= ~LONG;
flags |= LONGLONG;
} else
flags |= LONG;
goto again;
case 'q':
flags |= LONGLONG; /* not quite */
goto again;
case 't':
flags |= PTRDIFFT;
goto again;
case 'z':
flags |= SIZET;
goto again;
case 'L':
flags |= LONGDBL;
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
View 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
View 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
View 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
View 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);
}