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5840c75c | 1 | /* Error-checking wrappers for memstream functions. |
d614a753 | 2 | Copyright (C) 2016-2020 Free Software Foundation, Inc. |
5840c75c 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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
5840c75c FW |
18 | |
19 | #ifndef SUPPORT_XMEMSTREAM_H | |
20 | #define SUPPORT_XMEMSTREAM_H | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <sys/cdefs.h> | |
24 | ||
25 | __BEGIN_DECLS | |
26 | ||
27 | /* Wrappers for other libc functions. */ | |
28 | struct xmemstream | |
29 | { | |
30 | FILE *out; | |
31 | char *buffer; | |
32 | size_t length; | |
33 | }; | |
34 | ||
35 | /* Create a new in-memory stream. Initializes *STREAM. After this | |
36 | function returns, STREAM->out is a file descriptor open for | |
37 | writing. errno is preserved, so that the %m format specifier can | |
38 | be used for writing to STREAM->out. */ | |
39 | void xopen_memstream (struct xmemstream *stream); | |
40 | ||
41 | /* Closes STREAM->OUT. After this function returns, STREAM->buffer | |
42 | and STREAM->length denote a memory range which contains the bytes | |
43 | written to the output stream. The caller should free | |
44 | STREAM->buffer. */ | |
45 | void xfclose_memstream (struct xmemstream *stream); | |
46 | ||
47 | __END_DECLS | |
48 | ||
49 | #endif /* SUPPORT_XMEMSTREAM_H */ |