newlib-cygwin/newlib/libc/stdio/vasprintf.c

64 lines
1.7 KiB
C

/*
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University 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 WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* This code was based on vsprintf.c */
/* doc in vfprintf.c */
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "%W% (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */
#include <_ansi.h>
#include <stdio.h>
#include <limits.h>
#include <stdarg.h>
#ifndef _REENT_ONLY
int
_DEFUN(vasprintf, (strp, fmt, ap),
char **strp _AND
const char *fmt _AND
va_list ap)
{
return _vasprintf_r (_REENT, strp, fmt, ap);
}
#endif /* !_REENT_ONLY */
int
_DEFUN(_vasprintf_r, (ptr, strp, fmt, ap),
struct _reent *ptr _AND
char **strp _AND
const char *fmt _AND
va_list ap)
{
int ret;
FILE f;
f._flags = __SWR | __SSTR | __SMBF ;
f._bf._base = f._p = NULL;
f._bf._size = f._w = 0;
f._file = -1; /* No file. */
ret = _svfprintf_r (ptr, &f, fmt, ap);
if (ret >= 0)
{
*f._p = 0;
*strp = f._bf._base;
}
return ret;
}