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04277e02 | 1 | /* Copyright (C) 1993-2019 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
96aa2d94 | 3 | |
41bdb6e2 AJ |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
96aa2d94 | 8 | |
41bdb6e2 AJ |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
40a55d20 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 AJ |
12 | Lesser General Public License for more details. |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. | |
41bdb6e2 AJ |
17 | |
18 | As a special exception, if you link the code in this file with | |
19 | files compiled with a GNU compiler to produce an executable, | |
20 | that does not cause the resulting executable to be covered by | |
21 | the GNU Lesser General Public License. This exception does not | |
22 | however invalidate any other reasons why the executable file | |
23 | might be covered by the GNU Lesser General Public License. | |
24 | This exception applies to code released by its copyright holders | |
25 | in files containing the exception. */ | |
96aa2d94 RM |
26 | |
27 | #include "libioP.h" | |
28 | ||
9964a145 ZW |
29 | size_t |
30 | _IO_fwrite (const void *buf, size_t size, size_t count, FILE *fp) | |
96aa2d94 | 31 | { |
9964a145 ZW |
32 | size_t request = size * count; |
33 | size_t written = 0; | |
96aa2d94 RM |
34 | CHECK_FILE (fp, 0); |
35 | if (request == 0) | |
a27c96b0 | 36 | return 0; |
0261d33f | 37 | _IO_acquire_lock (fp); |
bbdef797 | 38 | if (_IO_vtable_offset (fp) != 0 || _IO_fwide (fp, -1) == -1) |
d64b6ad0 | 39 | written = _IO_sputn (fp, (const char *) buf, request); |
0261d33f | 40 | _IO_release_lock (fp); |
3d110c7c EB |
41 | /* We have written all of the input in case the return value indicates |
42 | this or EOF is returned. The latter is a special case where we | |
43 | simply did not manage to flush the buffer. But the data is in the | |
44 | buffer and therefore written as far as fwrite is concerned. */ | |
45 | if (written == request || written == EOF) | |
96aa2d94 RM |
46 | return count; |
47 | else | |
40a55d20 | 48 | return written / size; |
96aa2d94 | 49 | } |
d18ea0c5 | 50 | libc_hidden_def (_IO_fwrite) |
96aa2d94 | 51 | |
b9b91868 | 52 | # include <stdio.h> |
96aa2d94 | 53 | weak_alias (_IO_fwrite, fwrite) |
b9b91868 | 54 | libc_hidden_weak (fwrite) |
66f8fa9b UD |
55 | # ifndef _IO_MTSAFE_IO |
56 | weak_alias (_IO_fwrite, fwrite_unlocked) | |
bf2cc5fb | 57 | libc_hidden_weak (fwrite_unlocked) |
66f8fa9b | 58 | # endif |