stdio-common/fxprintf.c

   1 /* Copyright (C) 2005-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.org>.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <assert.h>
  20 #include <ctype.h>
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23 #include <wchar.h>
  24 #include <string.h>
  25 #include <libioP.h>
  26
  27
  28 int
  29 __fxprintf (FILE *fp, const char *fmt, ...)
  30 {
  31   if (fp == NULL)
  32     fp = stderr;
  33
  34   va_list ap;
  35   va_start (ap, fmt);
  36
  37   int res;
  38   if (_IO_fwide (fp, 0) > 0)
  39     {
  40       size_t len = strlen (fmt) + 1;
  41       wchar_t wfmt[len];
  42       for (size_t i = 0; i < len; ++i)
  43         {
  44           assert (isascii (fmt[i]));
  45           wfmt[i] = fmt[i];
  46         }
  47       res = __vfwprintf (fp, wfmt, ap);
  48     }
  49   else
  50     res = _IO_vfprintf (fp, fmt, ap);
  51
  52   va_end (ap);
  53
  54   return res;
  55 }