Annotation of mandoc/compat_getsubopt.c, Revision 1.3
1.2 kristaps 1: #include "config.h"
2:
1.1 kristaps 3: #ifdef HAVE_GETSUBOPT
4:
5: int dummy;
6:
7: #else
8:
9: /* $OpenBSD: getsubopt.c,v 1.4 2005/08/08 08:05:36 espie Exp $ */
10:
11: /*-
12: * Copyright (c) 1990, 1993
13: * The Regents of the University of California. All rights reserved.
14: *
15: * Redistribution and use in source and binary forms, with or without
16: * modification, are permitted provided that the following conditions
17: * are met:
18: * 1. Redistributions of source code must retain the above copyright
19: * notice, this list of conditions and the following disclaimer.
20: * 2. Redistributions in binary form must reproduce the above copyright
21: * notice, this list of conditions and the following disclaimer in the
22: * documentation and/or other materials provided with the distribution.
23: * 3. Neither the name of the University nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: */
39:
40: #include <unistd.h>
41: #include <stdlib.h>
42: #include <string.h>
43:
44: /*
45: * The SVID interface to getsubopt provides no way of figuring out which
46: * part of the suboptions list wasn't matched. This makes error messages
47: * tricky... The extern variable suboptarg is a pointer to the token
48: * which didn't match.
49: */
50: char *suboptarg;
51:
52: int
53: getsubopt(char **optionp, char * const *tokens, char **valuep)
54: {
55: int cnt;
56: char *p;
57:
58: suboptarg = *valuep = NULL;
59:
60: if (!optionp || !*optionp)
61: return(-1);
62:
63: /* skip leading white-space, commas */
64: for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
65:
66: if (!*p) {
67: *optionp = p;
68: return(-1);
69: }
70:
71: /* save the start of the token, and skip the rest of the token. */
72: for (suboptarg = p;
73: *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
74:
75: if (*p) {
76: /*
77: * If there's an equals sign, set the value pointer, and
78: * skip over the value part of the token. Terminate the
79: * token.
80: */
81: if (*p == '=') {
82: *p = '\0';
83: for (*valuep = ++p;
84: *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
85: if (*p)
86: *p++ = '\0';
87: } else
88: *p++ = '\0';
89: /* Skip any whitespace or commas after this token. */
90: for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
91: }
92:
93: /* set optionp for next round. */
94: *optionp = p;
95:
96: for (cnt = 0; *tokens; ++tokens, ++cnt)
97: if (!strcmp(suboptarg, *tokens))
98: return(cnt);
99: return(-1);
100: }
101:
102: #endif
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