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 <fcntl.h>
20 #include <stdlib.h>
21 
22 int
23 mark_nonblock(int fd)
24 {
25 	int flags;
26 
27 	if ((flags = fcntl(fd, F_GETFL)) == -1)
28                 return 0;
29 	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
30                 return 0;
31 	return 1;
32 }
33 
34 char *
35 telescope_strnchr(char *b, char d, size_t len)
36 {
37 	size_t i;
38 
39 	for (i = 0; i < len; ++i) {
40 		if (b[i] == d)
41 			return &b[i];
42 	}
43 
44 	return NULL;
45 }
46 
47 int
48 has_prefix(const char *str, const char *prfx)
49 {
50 	size_t i;
51 
52 	for (i = 0; str[i] != '\0' && prfx[i] != '\0'; ++i)
53 		if (str[i] != prfx[i])
54 			return 0;
55 	return prfx[i] == '\0';
56 }