minix/lib/libc/stdio/vsnprintf.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

129 lines
3.5 KiB
C

/* $NetBSD: vsnprintf.c,v 1.27 2013/05/17 12:55:57 joerg Exp $ */
/*-
* 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. 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 defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)vsnprintf.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: vsnprintf.c,v 1.27 2013/05/17 12:55:57 joerg Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <assert.h>
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include "reentrant.h"
#include "setlocale_local.h"
#include "local.h"
#if defined(_FORTIFY_SOURCE) && !defined(__lint__)
#undef vsnprintf
#define vsnprintf _vsnprintf
#undef snprintf
#define snprintf _snprintf
#endif
#ifdef __weak_alias
__weak_alias(vsnprintf,_vsnprintf)
__weak_alias(vsnprintf_l,_vsnprintf_l)
__weak_alias(snprintf,_snprintf)
__weak_alias(snprintf_l,_snprintf_l)
#endif
int
vsnprintf_l(char *str, size_t n, locale_t loc, const char *fmt, va_list ap)
{
int ret;
FILE f;
struct __sfileext fext;
unsigned char dummy[1];
_DIAGASSERT(n == 0 || str != NULL);
_DIAGASSERT(fmt != NULL);
if ((int)n < 0) {
errno = EINVAL;
return -1;
}
_FILEEXT_SETUP(&f, &fext);
f._file = -1;
f._flags = __SWR | __SSTR;
if (n == 0) {
f._bf._base = f._p = dummy;
f._bf._size = f._w = 0;
} else {
f._bf._base = f._p = (unsigned char *)str;
_DIAGASSERT(__type_fit(int, n - 1));
f._bf._size = f._w = (int)(n - 1);
}
ret = __vfprintf_unlocked_l(&f, loc, fmt, ap);
*f._p = 0;
return ret;
}
int
vsnprintf(char *str, size_t n, const char *fmt, va_list ap)
{
return vsnprintf_l(str, n, _current_locale(), fmt, ap);
}
int
snprintf(char *str, size_t n, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = vsnprintf(str, n, fmt, ap);
va_end(ap);
return ret;
}
int
snprintf_l(char *str, size_t n, locale_t loc, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = vsnprintf_l(str, n, loc, fmt, ap);
va_end(ap);
return ret;
}