Retro68/gcc/newlib/libc/stdio/vsniprintf.c

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/*
* 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.
*/
/* doc in viprintf.c */
#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>
#include <stdarg.h>
#include <errno.h>
#include "local.h"
#ifndef _REENT_ONLY
int
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vsniprintf (char *str,
size_t size,
const char *fmt,
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va_list ap)
{
return _vsniprintf_r (_REENT, str, size, fmt, ap);
}
#endif /* !_REENT_ONLY */
int
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_vsniprintf_r (struct _reent *ptr,
char *str,
size_t size,
const char *fmt,
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va_list ap)
{
int ret;
FILE f;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
f._file = -1; /* No file. */
ret = _svfiprintf_r (ptr, &f, fmt, ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return ret;
}