1 /*
2  * Copyright (c) 2020 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 <errno.h>
18 #include <string.h>
19 
20 #include "gmid.h"
21 
22 int
23 starts_with(const char *str, const char *prefix)
24 {
25 	size_t i;
26 
27 	if (prefix == NULL)
28 		return 0;
29 
30 	for (i = 0; prefix[i] != '\0'; ++i)
31 		if (str[i] != prefix[i])
32 			return 0;
33 	return 1;
34 }
35 
36 int
37 ends_with(const char *str, const char *sufx)
38 {
39 	size_t i, j;
40 
41 	i = strlen(str);
42 	j = strlen(sufx);
43 
44 	if (j > i)
45 		return 0;
46 
47 	i -= j;
48 	for (j = 0; str[i] != '\0'; i++, j++)
49 		if (str[i] != sufx[j])
50 			return 0;
51 	return 1;
52 }
53 
54 ssize_t
55 filesize(int fd)
56 {
57 	ssize_t len;
58 
59 	if ((len = lseek(fd, 0, SEEK_END)) == -1)
60 		return -1;
61 	if (lseek(fd, 0, SEEK_SET) == -1)
62 		return -1;
63 	return len;
64 }