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glibc  2.9
iofwrite_u.c
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00001 /* Copyright (C) 1993, 1996-2000, 2002, 2008 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.
00018 
00019    As a special exception, if you link the code in this file with
00020    files compiled with a GNU compiler to produce an executable,
00021    that does not cause the resulting executable to be covered by
00022    the GNU Lesser General Public License.  This exception does not
00023    however invalidate any other reasons why the executable file
00024    might be covered by the GNU Lesser General Public License.
00025    This exception applies to code released by its copyright holders
00026    in files containing the exception.  */
00027 
00028 #include "libioP.h"
00029 #include <stdio.h>
00030 
00031 #undef fwrite_unlocked
00032 
00033 _IO_size_t
00034 fwrite_unlocked (buf, size, count, fp)
00035      const void *buf;
00036      _IO_size_t size;
00037      _IO_size_t count;
00038      _IO_FILE *fp;
00039 {
00040   _IO_size_t request = size * count;
00041   _IO_size_t written = 0;
00042   CHECK_FILE (fp, 0);
00043   if (request == 0)
00044     return 0;
00045   if (_IO_fwide (fp, -1) == -1)
00046     {
00047       written = _IO_sputn (fp, (const char *) buf, request);
00048       /* We have written all of the input in case the return value indicates
00049         this or EOF is returned.  The latter is a special case where we
00050         simply did not manage to flush the buffer.  But the data is in the
00051         buffer and therefore written as far as fwrite is concerned.  */
00052       if (written == request || written == EOF)
00053        return count;
00054     }
00055 
00056   return written / size;
00057 }
00058 libc_hidden_def (fwrite_unlocked)