1 /*
2 * Copyright © 2015 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include <string.h>
25 #include "main/macros.h"
26 #include "debug.h"
27
28 uint64_t
parse_debug_string(const char * debug,const struct debug_control * control)29 parse_debug_string(const char *debug,
30 const struct debug_control *control)
31 {
32 uint64_t flag = 0;
33
34 if (debug != NULL) {
35 for (; control->string != NULL; control++) {
36 if (!strcmp(debug, "all")) {
37 flag |= control->flag;
38
39 } else {
40 const char *s = debug;
41 unsigned n;
42
43 for (; n = strcspn(s, ", "), *s; s += MAX2(1, n)) {
44 if (strlen(control->string) == n &&
45 !strncmp(control->string, s, n))
46 flag |= control->flag;
47 }
48 }
49 }
50 }
51
52 return flag;
53 }
54
55 /**
56 * Reads an environment variable and interprets its value as a boolean.
57 *
58 * Recognizes 0/false/no and 1/true/yes. Other values result in the default value.
59 */
60 bool
env_var_as_boolean(const char * var_name,bool default_value)61 env_var_as_boolean(const char *var_name, bool default_value)
62 {
63 const char *str = getenv(var_name);
64 if (str == NULL)
65 return default_value;
66
67 if (strcmp(str, "1") == 0 ||
68 strcasecmp(str, "true") == 0 ||
69 strcasecmp(str, "yes") == 0) {
70 return true;
71 } else if (strcmp(str, "0") == 0 ||
72 strcasecmp(str, "false") == 0 ||
73 strcasecmp(str, "no") == 0) {
74 return false;
75 } else {
76 return default_value;
77 }
78 }
79