PostgreSQL Source Code: src/port/getopt.c Source File

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getopt.c
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1/* src/port/getopt.c */
2
3/*
4 * Copyright (c) 1987, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include "c.h"
33
34#include "pg_getopt.h"
35
36#if defined(LIBC_SCCS) && !defined(lint)
37static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
38#endif /* LIBC_SCCS and not lint */
39
40
41/*
42 * On OpenBSD and some versions of Solaris, opterr and friends are defined in
43 * core libc rather than in a separate getopt module. Define these variables
44 * only if configure found they aren't there by default; otherwise, this
45 * module and its callers will just use libc's variables. (We assume that
46 * testing opterr is sufficient for all of these.)
47 */
48#ifndef HAVE_INT_OPTERR
49
50 int opterr = 1, /* if error message should be printed */
51 optind = 1, /* index into parent argv vector */
52 optopt; /* character checked for validity */
53 char *optarg; /* argument associated with option */
54
55#endif
56
57 #define BADCH (int)'?'
58 #define BADARG (int)':'
59 #define EMSG ""
60
61/*
62 * getopt
63 * Parse argc/argv argument vector.
64 *
65 * This implementation does not use optreset. Instead, we guarantee that
66 * it can be restarted on a new argv array after a previous call returned -1,
67 * if the caller resets optind to 1 before the first call of the new series.
68 * (Internally, this means we must be sure to reset "place" to EMSG before
69 * returning -1.)
70 */
71int
72 getopt(int nargc, char *const *nargv, const char *ostr)
73{
74 static char *place = EMSG; /* option letter processing */
75 char *oli; /* option letter list index */
76
77 if (!*place)
78 { /* update scanning pointer */
79 if (optind >= nargc || *(place = nargv[optind]) != '-')
80 {
81 place = EMSG;
82 return -1;
83 }
84 if (place[1] && *++place == '-' && place[1] == '0円')
85 { /* found "--" */
86 ++optind;
87 place = EMSG;
88 return -1;
89 }
90 } /* option letter okay? */
91 if ((optopt = (int) *place++) == (int) ':' ||
92 !(oli = strchr(ostr, optopt)))
93 {
94 /*
95 * if the user didn't specify '-' as an option, assume it means -1.
96 */
97 if (optopt == (int) '-')
98 {
99 place = EMSG;
100 return -1;
101 }
102 if (!*place)
103 ++optind;
104 if (opterr && *ostr != ':')
105 (void) fprintf(stderr,
106 "illegal option -- %c\n", optopt);
107 return BADCH;
108 }
109 if (*++oli != ':')
110 { /* don't need argument */
111 optarg = NULL;
112 if (!*place)
113 ++optind;
114 }
115 else
116 { /* need an argument */
117 if (*place) /* no white space */
118 optarg = place;
119 else if (nargc <= ++optind)
120 { /* no arg */
121 place = EMSG;
122 if (*ostr == ':')
123 return BADARG;
124 if (opterr)
125 (void) fprintf(stderr,
126 "option requires an argument -- %c\n",
127 optopt);
128 return BADCH;
129 }
130 else
131 /* white space */
132 optarg = nargv[optind];
133 place = EMSG;
134 ++optind;
135 }
136 return optopt; /* dump back option letter */
137}
#define fprintf(file, fmt, msg)
Definition: cubescan.l:21
#define BADCH
Definition: getopt.c:57
int optopt
Definition: getopt.c:52
#define BADARG
Definition: getopt.c:58
#define EMSG
Definition: getopt.c:59
int getopt(int nargc, char *const *nargv, const char *ostr)
Definition: getopt.c:72
int optind
Definition: getopt.c:51
char * optarg
Definition: getopt.c:53
int opterr
Definition: getopt.c:50

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