stdio-common/fxprintf.c

   1 /* Copyright (C) 2005 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <assert.h>
  21 #include <ctype.h>
  22 #include <stdarg.h>
  23 #include <stdio.h>
  24 #include <wchar.h>
  25 #include <string.h>
  26 #include <libioP.h>
  27
  28
  29 int
  30 __fxprintf (FILE *fp, const char *fmt, ...)
  31 {
  32   if (fp == NULL)
  33     fp = stderr;
  34
  35   va_list ap;
  36   va_start (ap, fmt);
  37
  38   int res;
  39   if (_IO_fwide (fp, 0) > 0)
  40     {
  41       size_t len = strlen (fmt) + 1;
  42       wchar_t wfmt[len];
  43       for (size_t i = 0; i < len; ++i)
  44         {
  45           assert (isascii (fmt[i]));
  46           wfmt[i] = fmt[i];
  47         }
  48       res = __vfwprintf (fp, wfmt, ap);
  49     }
  50   else
  51     res = INTUSE(_IO_vfprintf) (fp, fmt, ap);
  52
  53   va_end (ap);
  54
  55   return res;
  56 }