freebsd-dev/lib/libc/stdio/vasprintf.c

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/* $OpenBSD: vasprintf.c,v 1.4 1998/06/21 22:13:47 millert Exp $ */
/*
* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Copyright (c) 2011 The FreeBSD Foundation
* All rights reserved.
* Portions of this software were developed by David Chisnall
* under sponsorship from the FreeBSD Foundation.
*
* 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>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "xlocale_private.h"
#include "local.h"
int
vasprintf_l(char **str, locale_t locale, const char *fmt, __va_list ap)
{
FILE f = FAKE_FILE;
int ret;
FIX_LOCALE(locale);
f._flags = __SWR | __SSTR | __SALC;
f._bf._base = f._p = malloc(128);
if (f._bf._base == NULL) {
*str = NULL;
errno = ENOMEM;
return (-1);
}
f._bf._size = f._w = 127; /* Leave room for the NUL */
ret = __vfprintf(&f, locale, fmt, ap);
if (ret < 0) {
free(f._bf._base);
*str = NULL;
errno = ENOMEM;
return (-1);
}
*f._p = '\0';
*str = (char *)f._bf._base;
return (ret);
}
int
vasprintf(char **str, const char *fmt, __va_list ap)
{
return vasprintf_l(str, __get_locale(), fmt, ap);
}