Annotation of mandoc/compat_getsubopt.c, Revision 1.6
1.6 ! schwarze 1: /* $Id: compat_getsubopt.c,v 1.5 2014/08/17 20:53:50 schwarze Exp $ */
1.1 kristaps 2: /* $OpenBSD: getsubopt.c,v 1.4 2005/08/08 08:05:36 espie Exp $ */
3:
4: /*-
5: * Copyright (c) 1990, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
1.6 ! schwarze 32: #include "config.h"
1.1 kristaps 33:
34: #include <unistd.h>
35: #include <stdlib.h>
36: #include <string.h>
37:
38: int
39: getsubopt(char **optionp, char * const *tokens, char **valuep)
40: {
41: int cnt;
1.5 schwarze 42: char *suboptarg;
1.1 kristaps 43: char *p;
44:
45: suboptarg = *valuep = NULL;
46:
47: if (!optionp || !*optionp)
48: return(-1);
49:
50: /* skip leading white-space, commas */
51: for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
52:
53: if (!*p) {
54: *optionp = p;
55: return(-1);
56: }
57:
58: /* save the start of the token, and skip the rest of the token. */
59: for (suboptarg = p;
60: *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
61:
62: if (*p) {
63: /*
64: * If there's an equals sign, set the value pointer, and
65: * skip over the value part of the token. Terminate the
66: * token.
67: */
68: if (*p == '=') {
69: *p = '\0';
70: for (*valuep = ++p;
71: *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
72: if (*p)
73: *p++ = '\0';
74: } else
75: *p++ = '\0';
76: /* Skip any whitespace or commas after this token. */
77: for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
78: }
79:
80: /* set optionp for next round. */
81: *optionp = p;
82:
83: for (cnt = 0; *tokens; ++tokens, ++cnt)
84: if (!strcmp(suboptarg, *tokens))
85: return(cnt);
86: return(-1);
87: }
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