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glibc  2.9
fxprintf.c
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00001 /* Copyright (C) 2005 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@gnu.org>.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <assert.h>
00021 #include <ctype.h>
00022 #include <stdarg.h>
00023 #include <stdio.h>
00024 #include <wchar.h>
00025 #include <string.h>
00026 #include <libioP.h>
00027 
00028 
00029 int
00030 __fxprintf (FILE *fp, const char *fmt, ...)
00031 {
00032   if (fp == NULL)
00033     fp = stderr;
00034 
00035   va_list ap;
00036   va_start (ap, fmt);
00037 
00038   int res;
00039   if (_IO_fwide (fp, 0) > 0)
00040     {
00041       size_t len = strlen (fmt) + 1;
00042       wchar_t wfmt[len];
00043       for (size_t i = 0; i < len; ++i)
00044        {
00045          assert (isascii (fmt[i]));
00046          wfmt[i] = fmt[i];
00047        }
00048       res = __vfwprintf (fp, wfmt, ap);
00049     }
00050   else
00051     res = INTUSE(_IO_vfprintf) (fp, fmt, ap);
00052 
00053   va_end (ap);
00054 
00055   return res;
00056 }