1/* Wide printf buffers writing data to a FILE *.
2 Copyright (C) 2022-2023 Free Software Foundation, Inc.
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
27void
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
40void
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
48int
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}
56