1/* Error-checking wrappers for memstream functions.
2 Copyright (C) 2016-2020 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#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. */
28struct 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. */
39void 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. */
45void xfclose_memstream (struct xmemstream *stream);
46
47__END_DECLS
48
49#endif /* SUPPORT_XMEMSTREAM_H */
50