glibc/stdio-common/fxprintf.c

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/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.org>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <wchar.h>
#include <string.h>
#include <libioP.h>
int
__fxprintf (FILE *fp, const char *fmt, ...)
{
if (fp == NULL)
fp = stderr;
va_list ap;
va_start (ap, fmt);
int res;
if (_IO_fwide (fp, 0) > 0)
{
size_t len = strlen (fmt) + 1;
wchar_t wfmt[len];
for (size_t i = 0; i < len; ++i)
{
assert (isascii (fmt[i]));
wfmt[i] = fmt[i];
}
res = __vfwprintf (fp, wfmt, ap);
}
else
res = INTUSE(_IO_vfprintf) (fp, fmt, ap);
va_end (ap);
return res;
}