Mercurial > code

comparison port/C/extern/getopt.c @ 543:dc1b5143c5e3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Misc: new hierarchy
author David Demelier <markand@malikania.fr>
date Mon, 13 Jun 2016 16:13:40 +0200
parents port/extern/getopt.c@7ee8da32da98
children
comparison
equal deleted inserted replaced
542:3b62482f929e 543:dc1b5143c5e3
1 /*
2 * getopt.c -- getopt(3) from FreeBSD (portable version)
3 */
4
5 /*-
6 * Copyright (c) 1987, 1993, 1994
7 * The Regents of the University of California. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37
38 int opterr = 1, /* if error message should be printed */
39 optind = 1, /* index into parent argv vector */
40 optopt, /* character checked for validity */
41 optreset; /* reset getopt */
42 char *optarg; /* argument associated with option */
43
44 #define BADCH (int)'?'
45 #define BADARG (int)':'
46 #define EMSG ""
47
48 /*
49 * getopt --
50 * Parse argc/argv argument vector.
51 */
52 int
53 getopt(nargc, nargv, ostr)
54 int nargc;
55 char * const nargv[];
56 const char *ostr;
57 {
58 static char *place = EMSG; /* option letter processing */
59 char *oli; /* option letter list index */
60
61 if (optreset || *place == 0) { /* update scanning pointer */
62 optreset = 0;
63 place = nargv[optind];
64 if (optind >= nargc || *place++ != '-') {
65 /* Argument is absent or is not an option */
66 place = EMSG;
67 return (-1);
68 }
69 optopt = *place++;
70 if (optopt == '-' && *place == 0) {
71 /* "--" => end of options */
72 ++optind;
73 place = EMSG;
74 return (-1);
75 }
76 if (optopt == 0) {
77 /* Solitary '-', treat as a '-' option
78 if the program (eg su) is looking for it. */
79 place = EMSG;
80 if (strchr(ostr, '-') == NULL)
81 return (-1);
82 optopt = '-';
83 }
84 } else
85 optopt = *place++;
86
87 /* See if option letter is one the caller wanted... */
88 if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
89 if (*place == 0)
90 ++optind;
91 if (opterr && *ostr != ':')
92 (void)fprintf(stderr,
93 "illegal option -- %c\n", optopt);
94 return (BADCH);
95 }
96
97 /* Does this option need an argument? */
98 if (oli[1] != ':') {
99 /* don't need argument */
100 optarg = NULL;
101 if (*place == 0)
102 ++optind;
103 } else {
104 /* Option-argument is either the rest of this argument or the
105 entire next argument. */
106 if (*place)
107 optarg = place;
108 else if (nargc > ++optind)
109 optarg = nargv[optind];
110 else {
111 /* option-argument absent */
112 place = EMSG;
113 if (*ostr == ':')
114 return (BADARG);
115 if (opterr)
116 (void)fprintf(stderr,
117 "option requires an argument -- %c\n", optopt);
118 return (BADCH);
119 }
120 place = EMSG;
121 ++optind;
122 }
123 return (optopt); /* return option letter */
124 }