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

76 lines
2.0 KiB
C

/* doc in vfprintf.c */
/* This code created by modifying vsprintf.c so copyright inherited. */
/*
* Copyright (c) 1990 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "%W% (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */
#include <_ansi.h>
#include <reent.h>
#include <stdio.h>
#include <limits.h>
#ifdef _HAVE_STDC
#include <stdarg.h>
#else
#include <varargs.h>
#endif
int
_DEFUN (vsnprintf, (str, size, fmt, ap),
char *str _AND
size_t size _AND
_CONST char *fmt _AND
va_list ap)
{
int ret;
FILE f;
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
f._data = _REENT;
ret = vfprintf (&f, fmt, ap);
if (size > 0)
*f._p = 0;
return ret;
}
int
_DEFUN (_vsnprintf_r, (ptr, str, size, fmt, ap),
struct _reent *ptr _AND
char *str _AND
size_t size _AND
_CONST char *fmt _AND
va_list ap)
{
int ret;
FILE f;
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
f._data = ptr;
ret = _vfprintf_r (ptr, &f, fmt, ap);
if (size > 0)
*f._p = 0;
return ret;
}