| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 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. |
| 8 | |
| 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 |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. |
| 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. */ |
| 26 | |
| 27 | #include "libioP.h" |
| 28 | |
| 29 | _IO_size_t |
| 30 | _IO_fwrite (const void *buf, _IO_size_t size, _IO_size_t count, _IO_FILE *fp) |
| 31 | { |
| 32 | _IO_size_t request = size * count; |
| 33 | _IO_size_t written = 0; |
| 34 | CHECK_FILE (fp, 0); |
| 35 | if (request == 0) |
| 36 | return 0; |
| 37 | _IO_acquire_lock (fp); |
| 38 | if (_IO_vtable_offset (fp) != 0 || _IO_fwide (fp, -1) == -1) |
| 39 | written = _IO_sputn (fp, (const char *) buf, request); |
| 40 | _IO_release_lock (fp); |
| 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) |
| 46 | return count; |
| 47 | else |
| 48 | return written / size; |
| 49 | } |
| 50 | libc_hidden_def (_IO_fwrite) |
| 51 | |
| 52 | #ifdef weak_alias |
| 53 | # include <stdio.h> |
| 54 | weak_alias (_IO_fwrite, fwrite) |
| 55 | libc_hidden_weak (fwrite) |
| 56 | # ifndef _IO_MTSAFE_IO |
| 57 | weak_alias (_IO_fwrite, fwrite_unlocked) |
| 58 | libc_hidden_weak (fwrite_unlocked) |
| 59 | # endif |
| 60 | #endif |