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comparison dcclib/getopt.c @ 0:c7f6b056b673

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First import of vendor version
author Peter Gervai <grin@grin.hu>
date Tue, 10 Mar 2009 13:49:58 +0100
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-1:000000000000 0:c7f6b056b673
1 /* copy of getopt(3) for Windows */
2
3 #include "dcc_defs.h"
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 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #if defined(LIBC_SCCS) && !defined(lint)
39 #if 0
40 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
41 #endif
42 static const char rcsid[] = "$FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.2.2.2 2001/08/26 03:36:04 jkoshy Exp $";
43 #endif /* LIBC_SCCS and not lint */
44
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48
49 int opterr = 0, /* if error message should be printed */
50 optind = 1, /* index into parent argv vector */
51 optopt, /* character checked for validity */
52 optreset; /* reset getopt */
53 char *optarg; /* argument associated with option */
54
55 #define BADCH (int)'?'
56 #define BADARG (int)':'
57 #define EMSG ""
58
59 /*
60 * getopt --
61 * Parse argc/argv argument vector.
62 */
63 int
64 getopt(nargc, nargv, ostr)
65 int nargc;
66 char * const *nargv;
67 const char *ostr;
68 {
69 static char *place = EMSG; /* option letter processing */
70 char *oli; /* option letter list index */
71
72 if (optreset || !*place) { /* update scanning pointer */
73 optreset = 0;
74 if (optind >= nargc || *(place = nargv[optind]) != '-') {
75 place = EMSG;
76 return (-1);
77 }
78 if (place[1] && *++place == '-') { /* found "--" */
79 ++optind;
80 place = EMSG;
81 return (-1);
82 }
83 } /* option letter okay? */
84 if ((optopt = (int)*place++) == (int)':' ||
85 (oli = strchr(ostr, optopt)) == 0) {
86 /*
87 * if the user didn't specify '-' as an option,
88 * assume it means -1.
89 */
90 if (optopt == (int)'-')
91 return (-1);
92 if (!*place)
93 ++optind;
94 if (opterr && *ostr != ':' && optopt != BADCH)
95 (void)fprintf(stderr,
96 "%s: illegal option -- %c\n", __progname, optopt);
97 return (BADCH);
98 }
99 if (*++oli != ':') { /* don't need argument */
100 optarg = NULL;
101 if (!*place)
102 ++optind;
103 }
104 else { /* need an argument */
105 if (*place) /* no white space */
106 optarg = place;
107 else if (nargc <= ++optind) { /* no arg */
108 place = EMSG;
109 if (*ostr == ':')
110 return (BADARG);
111 if (opterr)
112 (void)fprintf(stderr,
113 "%s: option requires an argument -- %c\n",
114 __progname, optopt);
115 return (BADCH);
116 }
117 else /* white space */
118 optarg = nargv[optind];
119 place = EMSG;
120 ++optind;
121 }
122 return (optopt); /* dump back option letter */
123 }