minix/lib/libc/stdio/vasprintf.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

116 lines
3.2 KiB
C

/* $NetBSD: vasprintf.c,v 1.17 2013/05/19 21:45:00 christos Exp $ */
/*
* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 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)
__RCSID("$NetBSD: vasprintf.c,v 1.17 2013/05/19 21:45:00 christos Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <assert.h>
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include "reentrant.h"
#include "setlocale_local.h"
#include "local.h"
__weak_alias(asprintf, _asprintf)
__weak_alias(asprintf_l, _asprintf_l)
__weak_alias(vasprintf, _vasprintf)
__weak_alias(vasprintf_l, _vasprintf_l)
int
vasprintf_l(char **str, locale_t loc, const char *fmt, va_list ap)
{
int ret;
FILE f;
struct __sfileext fext;
unsigned char *_base;
_DIAGASSERT(str != NULL);
_DIAGASSERT(fmt != NULL);
_FILEEXT_SETUP(&f, &fext);
f._file = -1;
f._flags = __SWR | __SSTR | __SALC;
f._bf._base = f._p = malloc(128);
if (f._bf._base == NULL)
goto err;
f._bf._size = f._w = 127; /* Leave room for the NUL */
ret = __vfprintf_unlocked_l(&f, loc, fmt, ap);
if (ret == -1)
goto err;
*f._p = '\0';
_base = realloc(f._bf._base, (size_t)(ret + 1));
if (_base == NULL)
goto err;
*str = (char *)_base;
return ret;
err:
if (f._bf._base)
free(f._bf._base);
*str = NULL;
errno = ENOMEM;
return -1;
}
int
vasprintf(char **str, const char *fmt, va_list ap)
{
return vasprintf_l(str, _current_locale(), fmt, ap);
}
int
asprintf_l(char **str, locale_t loc, char const *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = vasprintf_l(str, loc, fmt, ap);
va_end(ap);
return ret;
}
int
asprintf(char **str, char const *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = vasprintf(str, fmt, ap);
va_end(ap);
return ret;
}