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

92 lines
2.3 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 copied from sprintf.c */
/* doc in sprintf.c */
#include <_ansi.h>
#include <reent.h>
#include <stdio.h>
#include <stdarg.h>
#include <limits.h>
#include "local.h"
int
_DEFUN(_asprintf_r, (ptr, strp, fmt),
struct _reent *ptr _AND
char **__restrict strp _AND
const char *__restrict fmt _DOTS)
{
int ret;
va_list ap;
FILE f;
/* mark a zero-length reallocatable buffer */
f._flags = __SWR | __SSTR | __SMBF;
f._bf._base = f._p = NULL;
f._bf._size = f._w = 0;
f._file = -1; /* No file. */
va_start (ap, fmt);
ret = _svfprintf_r (ptr, &f, fmt, ap);
va_end (ap);
if (ret >= 0)
{
*f._p = 0;
*strp = (char *) f._bf._base;
}
return (ret);
}
#ifdef _NANO_FORMATTED_IO
int
_EXFUN(_asiprintf_r, (struct _reent *, char **, const char *, ...)
_ATTRIBUTE ((__alias__("_asprintf_r"))));
#endif
#ifndef _REENT_ONLY
int
_DEFUN(asprintf, (strp, fmt),
char **__restrict strp _AND
const char *__restrict fmt _DOTS)
{
int ret;
va_list ap;
FILE f;
/* mark a zero-length reallocatable buffer */
f._flags = __SWR | __SSTR | __SMBF;
f._bf._base = f._p = NULL;
f._bf._size = f._w = 0;
f._file = -1; /* No file. */
va_start (ap, fmt);
ret = _svfprintf_r (_REENT, &f, fmt, ap);
va_end (ap);
if (ret >= 0)
{
*f._p = 0;
*strp = (char *) f._bf._base;
}
return (ret);
}
#ifdef _NANO_FORMATTED_IO
int
_EXFUN(asiprintf, (char **, const char *, ...)
_ATTRIBUTE ((__alias__("asprintf"))));
#endif
#endif /* ! _REENT_ONLY */