Mercurial > molko
annotate src/core/rbuf.c @ 120:b3429b26d60d
core: add rbuf utility, closes #2488 @2h
author | David Demelier <markand@malikania.fr> |
---|---|
date | Mon, 05 Oct 2020 13:05:09 +0200 |
parents | |
children |
rev | line source |
---|---|
120
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
1 /* |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
2 * rbuf.c -- basic utility for reading input buffers |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
3 * |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
4 * Copyright (c) 2020 David Demelier <markand@malikania.fr> |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
5 * |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
6 * Permission to use, copy, modify, and/or distribute this software for any |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
7 * purpose with or without fee is hereby granted, provided that the above |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
8 * copyright notice and this permission notice appear in all copies. |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
9 * |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
17 */ |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
18 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
19 #include <assert.h> |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
20 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
21 #include "rbuf.h" |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
22 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
23 void |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
24 rbuf_open(struct rbuf *rb, const void *data, size_t datasz) |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
25 { |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
26 assert(rb); |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
27 assert(data); |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
28 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
29 rb->s = data; |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
30 rb->e = rb->s + datasz; |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
31 } |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
32 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
33 bool |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
34 rbuf_readline(struct rbuf *rb, char *output, size_t outputsz) |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
35 { |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
36 assert(rb); |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
37 assert(output); |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
38 assert(outputsz > 0); |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
39 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
40 if (rb->s == rb->e) |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
41 return false; |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
42 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
43 for (--outputsz; rb->s != rb->e && *rb->s != '\n' && outputsz; outputsz--) |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
44 *output++ = *rb->s++; |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
45 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
46 /* Not enough space? */ |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
47 if (!outputsz && rb->s != rb->e && *rb->s != '\n') |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
48 return false; |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
49 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
50 /* Remove this '\n' if still present. */ |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
51 if (rb->s != rb->e && *rb->s == '\n') |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
52 rb->s++; |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
53 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
54 *output = '\0'; |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
55 |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
56 return true; |
b3429b26d60d
core: add rbuf utility, closes #2488 @2h
David Demelier <markand@malikania.fr>
parents:
diff
changeset
|
57 } |