1: /*
2: * Copyright (c) 2010 Todd C. Miller <Todd.Miller@courtesan.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 <config.h>
18:
19: #include <sys/types.h>
20: #include <sys/param.h>
21:
22: #include <stdio.h>
23: #ifdef STDC_HEADERS
24: # include <stdlib.h>
25: # include <stddef.h>
26: #else
27: # ifdef HAVE_STDLIB_H
28: # include <stdlib.h>
29: # endif
30: #endif /* STDC_HEADERS */
31: #ifdef HAVE_STRING_H
32: # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
33: # include <memory.h>
34: # endif
35: # include <string.h>
36: #endif /* HAVE_STRING_H */
37: #ifdef HAVE_STRINGS_H
38: # include <strings.h>
39: #endif /* HAVE_STRINGS_H */
40:
41: #include "missing.h"
42:
43: int
44: atobool(const char *str)
45: {
46: switch (*str) {
47: case '0':
48: case '1':
49: if (str[1] == '\0')
50: return *str - '0';
51: break;
52: case 'y':
53: case 'Y':
54: if (strcasecmp(str, "yes") == 0)
55: return 1;
56: break;
57: case 't':
58: case 'T':
59: if (strcasecmp(str, "true") == 0)
60: return 1;
61: break;
62: case 'o':
63: case 'O':
64: if (strcasecmp(str, "on") == 0)
65: return 1;
66: if (strcasecmp(str, "off") == 0)
67: return 0;
68: break;
69: case 'n':
70: case 'N':
71: if (strcasecmp(str, "no") == 0)
72: return 0;
73: break;
74: case 'f':
75: case 'F':
76: if (strcasecmp(str, "false") == 0)
77: return 0;
78: break;
79: }
80: return -1;
81: }
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