Mercurial > libbuf
comparison buf-shrink.c @ 23:b7690784cd17 0.3.0
misc: update before 0.3.0
author | David Demelier <markand@malikania.fr> |
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date | Thu, 16 Sep 2021 13:56:31 +0200 |
parents | d87e84936795 |
children | dddf94a30fa1 |
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22:d87e84936795 | 23:b7690784cd17 |
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1 /* | |
2 * buf-shrink.c -- simple string buffer for C | |
3 * | |
4 * Copyright (c) 2019-2021 David Demelier <markand@malikania.fr> | |
5 * | |
6 * Permission to use, copy, modify, and/or distribute this software for any | |
7 * purpose with or without fee is hereby granted, provided that the above | |
8 * copyright notice and this permission notice appear in all copies. | |
9 * | |
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
17 */ | |
18 | |
19 #include <assert.h> | |
20 #include <stdlib.h> | |
21 | |
22 #include "buf.h" | |
23 | |
24 int | |
25 buf_shrink(struct buf *b) | |
26 { | |
27 assert(b); | |
28 | |
29 void *newptr; | |
30 | |
31 if (b->length == 0) { | |
32 free(b->data); | |
33 b->data = NULL; | |
34 b->length = b->capacity = 0; | |
35 return 0; | |
36 } | |
37 | |
38 if (!(newptr = BUF_REALLOC(b->data, b->length + 1))) | |
39 return -1; | |
40 | |
41 b->data = newptr; | |
42 b->capacity = b->length; | |
43 | |
44 return 0; | |
45 } |