1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "telescope.h"
18 
19 #include <stdlib.h>
20 #include <string.h>
21 
22 int
23 parser_append(struct parser *p, const char *buf, size_t len)
24 {
25 	size_t newlen;
26 	char *t;
27 
28 	newlen = len + p->len;
29 	if ((t = calloc(1, newlen)) == NULL)
30 		return 0;
31 	memcpy(t, p->buf, p->len);
32 	memcpy(t + p->len, buf, len);
33 	free(p->buf);
34 	p->buf = t;
35 	p->len = newlen;
36 	return 1;
37 }
38 
39 int
40 parser_set_buf(struct parser *p, const char *buf, size_t len)
41 {
42 	free(p->buf);
43 	p->buf = NULL;
44 
45 	if (len == 0) {
46 		p->len = 0;
47 		return 1;
48 	}
49 
50 	if ((p->buf = calloc(1, len)) == NULL)
51 		return 0;
52 	memcpy(p->buf, buf, len);
53 	p->len = len;
54 	return 1;
55 }
56