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61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
/* Copyright (C) 1993-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>.
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As a special exception, if you link the code in this file with
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files compiled with a GNU compiler to produce an executable,
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that does not cause the resulting executable to be covered by
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the GNU Lesser General Public License. This exception does not
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however invalidate any other reasons why the executable file
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might be covered by the GNU Lesser General Public License.
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This exception applies to code released by its copyright holders
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in files containing the exception. */
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#include "libioP.h"
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_IO_size_t
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_IO_fwrite (const void *buf, _IO_size_t size, _IO_size_t count, _IO_FILE *fp)
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{
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_IO_size_t request = size * count;
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_IO_size_t written = 0;
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CHECK_FILE (fp, 0);
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if (request == 0)
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return 0;
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_IO_acquire_lock (fp);
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if (_IO_vtable_offset (fp) != 0 || _IO_fwide (fp, -1) == -1)
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written = _IO_sputn (fp, (const char *) buf, request);
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_IO_release_lock (fp);
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/* We have written all of the input in case the return value indicates
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this or EOF is returned. The latter is a special case where we
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simply did not manage to flush the buffer. But the data is in the
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buffer and therefore written as far as fwrite is concerned. */
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if (written == request || written == EOF)
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return count;
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else
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return written / size;
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}
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libc_hidden_def (_IO_fwrite)
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#ifdef weak_alias
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# include <stdio.h>
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weak_alias (_IO_fwrite, fwrite)
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libc_hidden_weak (fwrite)
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# ifndef _IO_MTSAFE_IO
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weak_alias (_IO_fwrite, fwrite_unlocked)
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libc_hidden_weak (fwrite_unlocked)
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# endif
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#endif
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