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/*
* 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,
* and/or 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 vfwprintf.c */
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "%W% (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */
#define _DEFAULT_SOURCE
#include <_ansi.h>
#include <stdio.h>
#include <wchar.h>
#include <limits.h>
#include <stdarg.h>
#include <errno.h>
#include "local.h"
int
vswprintf (
wchar_t *str,
size_t size,
const wchar_t *fmt,
va_list ap)
{
int ret;
FILE f;
if (size > INT_MAX / sizeof (wchar_t))
{
_REENT_ERRNO(ptr) = EOVERFLOW; /* POSIX extension */
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? (size - 1) * sizeof (wchar_t) : 0);
f._file = -1; /* No file. */
ret = svfwprintf ( &f, fmt, ap);
/* svfwprintf( so add one if
* appropriate, which is whenever size is > 0. _svfwprintf_r() stops
* after n-1, so always just put at the end. */
if (size > 0) {
*(wchar_t *)f._p = L'\0'; /* terminate the string */
}
if(ret >= 0 && (size_t) ret >= size) {
/* _svfwprintf_r() returns how many wide characters it would have printed
* if there were enough space. Return an error if too big to fit in str,
* unlike snprintf, which returns the size needed. */
_REENT_ERRNO(ptr) = EOVERFLOW; /* POSIX extension */
ret = -1;
}
return ret;
}
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