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659fe9fd | 1 | /* Wide printf buffers writing data to a FILE *. |
6d7e8eda | 2 | Copyright (C) 2022-2023 Free Software Foundation, Inc. |
659fe9fd FW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | /* This implementation is not optimized (unlikely the multibyte | |
20 | implementation) and always writes to the temporary buffer first. */ | |
21 | ||
22 | #include <printf_buffer_to_file.h> | |
23 | ||
24 | #include <array_length.h> | |
25 | #include <libio/libioP.h> | |
26 | ||
27 | void | |
28 | __wprintf_buffer_flush_to_file (struct __wprintf_buffer_to_file *buf) | |
29 | { | |
30 | size_t count = buf->base.write_ptr - buf->stage; | |
31 | if ((size_t) _IO_sputn (buf->fp, buf->stage, count) != count) | |
32 | { | |
33 | __wprintf_buffer_mark_failed (&buf->base); | |
34 | return; | |
35 | } | |
36 | buf->base.written += count; | |
37 | buf->base.write_ptr = buf->stage; | |
38 | } | |
39 | ||
40 | void | |
41 | __wprintf_buffer_to_file_init (struct __wprintf_buffer_to_file *buf, FILE *fp) | |
42 | { | |
43 | __wprintf_buffer_init (&buf->base, buf->stage, array_length (buf->stage), | |
44 | __wprintf_buffer_mode_to_file); | |
45 | buf->fp = fp; | |
46 | } | |
47 | ||
48 | int | |
49 | __wprintf_buffer_to_file_done (struct __wprintf_buffer_to_file *buf) | |
50 | { | |
51 | if (__wprintf_buffer_has_failed (&buf->base)) | |
52 | return -1; | |
53 | __wprintf_buffer_flush_to_file (buf); | |
54 | return __wprintf_buffer_done (&buf->base); | |
55 | } |