Annotation of mandoc/compat_getsubopt.c, Revision 1.5
1.2 kristaps 1: #include "config.h"
2:
1.4 schwarze 3: #if HAVE_GETSUBOPT
1.1 kristaps 4:
5: int dummy;
6:
7: #else
8:
1.5 ! schwarze 9: /* $Id$ */
1.1 kristaps 10: /* $OpenBSD: getsubopt.c,v 1.4 2005/08/08 08:05:36 espie Exp $ */
11:
12: /*-
13: * Copyright (c) 1990, 1993
14: * The Regents of the University of California. All rights reserved.
15: *
16: * Redistribution and use in source and binary forms, with or without
17: * modification, are permitted provided that the following conditions
18: * are met:
19: * 1. Redistributions of source code must retain the above copyright
20: * notice, this list of conditions and the following disclaimer.
21: * 2. Redistributions in binary form must reproduce the above copyright
22: * notice, this list of conditions and the following disclaimer in the
23: * documentation and/or other materials provided with the distribution.
24: * 3. Neither the name of the University nor the names of its contributors
25: * may be used to endorse or promote products derived from this software
26: * without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38: * SUCH DAMAGE.
39: */
40:
41: #include <unistd.h>
42: #include <stdlib.h>
43: #include <string.h>
44:
45: int
46: getsubopt(char **optionp, char * const *tokens, char **valuep)
47: {
48: int cnt;
1.5 ! schwarze 49: char *suboptarg;
1.1 kristaps 50: char *p;
51:
52: suboptarg = *valuep = NULL;
53:
54: if (!optionp || !*optionp)
55: return(-1);
56:
57: /* skip leading white-space, commas */
58: for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
59:
60: if (!*p) {
61: *optionp = p;
62: return(-1);
63: }
64:
65: /* save the start of the token, and skip the rest of the token. */
66: for (suboptarg = p;
67: *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
68:
69: if (*p) {
70: /*
71: * If there's an equals sign, set the value pointer, and
72: * skip over the value part of the token. Terminate the
73: * token.
74: */
75: if (*p == '=') {
76: *p = '\0';
77: for (*valuep = ++p;
78: *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
79: if (*p)
80: *p++ = '\0';
81: } else
82: *p++ = '\0';
83: /* Skip any whitespace or commas after this token. */
84: for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
85: }
86:
87: /* set optionp for next round. */
88: *optionp = p;
89:
90: for (cnt = 0; *tokens; ++tokens, ++cnt)
91: if (!strcmp(suboptarg, *tokens))
92: return(cnt);
93: return(-1);
94: }
95:
96: #endif
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