Mercurial > projects > pwm

annotate util.c @ 25:616385fa1fd9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Build common functions as a library that can be reused
author Guido Berhoerster <guido+pwm@berhoerster.name>
date Wed, 20 Sep 2017 23:57:51 +0200
parents a07665727c19
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
1 /*
16
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
2 * Copyright (C) 2017 Guido Berhoerster <guido+pwm@berhoerster.name>
0
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
3 *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
4 * Permission is hereby granted, free of charge, to any person obtaining
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
5 * a copy of this software and associated documentation files (the
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
6 * "Software"), to deal in the Software without restriction, including
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
7 * without limitation the rights to use, copy, modify, merge, publish,
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
8 * distribute, sublicense, and/or sell copies of the Software, and to
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
9 * permit persons to whom the Software is furnished to do so, subject to
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
10 * the following conditions:
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
11 *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
12 * The above copyright notice and this permission notice shall be included
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
13 * in all copies or substantial portions of the Software.
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
14 *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
22 */
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
23
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
24 #include "compat.h"
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
25
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
26 #ifdef HAVE_ERR_H
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
27 #include <err.h>
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
28 #endif /* HAVE_ERR_H */
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
29 #include <stdio.h>
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
30 #include <string.h>
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
31
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
32 #include "util.h"
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
33
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
34 void *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
35 xmalloc(size_t size)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
36 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
37 void *ptr;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
38
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
39 ptr = malloc(size);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
40 if (ptr == NULL) {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
41 err(1, "malloc");
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
42 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
43
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
44 return (ptr);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
45 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
46
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
47 void *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
48 xrealloc(void *ptr, size_t size)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
49 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
50 ptr = realloc(ptr, size);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
51 if (ptr == NULL) {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
52 err(1, "realloc");
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
53 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
54
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
55 return (ptr);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
56 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
57
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
58 char *
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
59 xstrdup(const char *str)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
60 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
61 char *new;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
62
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
63 new = strdup(str);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
64 if (new == NULL) {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
65 err(1, "strdup");
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
66 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
67
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
68 return (new);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
69 }
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
70
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
71 char *
16
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
72 xvasprintf(char **strp, const char *fmt, va_list args)
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
73 {
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
74 if (vasprintf(strp, fmt, args) < 0) {
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
75 err(1, "vasprintf");
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
76 }
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
77
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
78 return (*strp);
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
79 }
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
80
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
81 char *
0
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
82 xasprintf(char **strp, const char *fmt, ...)
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
83 {
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
84 va_list args;
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
85
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
86 va_start(args, fmt);
16
a07665727c19 Add status command
Guido Berhoerster <guido+pwm@berhoerster.name>
parents: 0
diff changeset
87 xvasprintf(strp, fmt, args);
0
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
88 va_end(args);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
89
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
90 return (*strp);
a7e41e1a79c8 Initial revision
Guido Berhoerster <guido+pwm@berhoerster.name>
parents:
diff changeset
91 }