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Initial revision

    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: }