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glibc/libio/iofwrite_u.c
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/* Copyright (C) 1993-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
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/>. | |
As a special exception, if you link the code in this file with | |
files compiled with a GNU compiler to produce an executable, | |
that does not cause the resulting executable to be covered by | |
the GNU Lesser General Public License. This exception does not | |
however invalidate any other reasons why the executable file | |
might be covered by the GNU Lesser General Public License. | |
This exception applies to code released by its copyright holders | |
in files containing the exception. */ | |
#include "libioP.h" | |
#include <stdio.h> | |
#undef fwrite_unlocked | |
_IO_size_t | |
fwrite_unlocked (const void *buf, _IO_size_t size, _IO_size_t count, | |
_IO_FILE *fp) | |
{ | |
_IO_size_t request = size * count; | |
_IO_size_t written = 0; | |
CHECK_FILE (fp, 0); | |
if (request == 0) | |
return 0; | |
if (_IO_fwide (fp, -1) == -1) | |
{ | |
written = _IO_sputn (fp, (const char *) buf, request); | |
/* We have written all of the input in case the return value indicates | |
this or EOF is returned. The latter is a special case where we | |
simply did not manage to flush the buffer. But the data is in the | |
buffer and therefore written as far as fwrite is concerned. */ | |
if (written == request || written == EOF) | |
return count; | |
} | |
return written / size; | |
} | |
libc_hidden_def (fwrite_unlocked) |