1 /*
2 * getopt_long() -- long options parser
3 *
4 * Portions Copyright (c) 1987, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Portions Copyright (c) 2003
8 * PostgreSQL Global Development Group
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $PostgreSQL: pgsql/src/port/getopt_long.c,v 1.8 2009-06-11 14:49:15 momjian Exp $
35 */
36
37 #include <stdio.h>
38 #include <string.h>
39 #include "utils/getopt_long.h"
40
41 #ifndef HAVE_INT_OPTRESET
42 int optreset;
43
44 /* else the "extern" was provided by getopt_long.h */
45 #endif
46
47 #define BADCH '?'
48 #define BADARG ':'
49 #define EMSG ""
50
51
52 int
getopt_long(int argc,char * const argv[],const char * optstring,const struct option * longopts,int * longindex)53 getopt_long(int argc, char *const argv[],
54 const char *optstring,
55 const struct option *longopts, int *longindex)
56 {
57 static char *place = EMSG; /* option letter processing */
58 char *oli; /* option letter list index */
59
60 if (optreset || !*place)
61 { /* update scanning pointer */
62 optreset = 0;
63
64 if (optind >= argc)
65 {
66 place = EMSG;
67 return -1;
68 }
69
70 place = argv[optind];
71
72 if (place[0] != '-')
73 {
74 place = EMSG;
75 return -1;
76 }
77
78 place++;
79
80 if (place[0] && place[0] == '-' && place[1] == '\0')
81 { /* found "--" */
82 ++optind;
83 place = EMSG;
84 return -1;
85 }
86
87 if (place[0] && place[0] == '-' && place[1])
88 {
89 /* long option */
90 size_t namelen;
91 int i;
92
93 place++;
94
95 namelen = strcspn(place, "=");
96 for (i = 0; longopts[i].name != NULL; i++)
97 {
98 if (strlen(longopts[i].name) == namelen
99 && strncmp(place, longopts[i].name, namelen) == 0)
100 {
101 if (longopts[i].has_arg)
102 {
103 if (place[namelen] == '=')
104 optarg = place + namelen + 1;
105 else if (optind < argc - 1)
106 {
107 optind++;
108 optarg = argv[optind];
109 }
110 else
111 {
112 if (optstring[0] == ':')
113 return BADARG;
114 if (opterr)
115 fprintf(stderr,
116 "%s: option requires an argument -- %s\n",
117 argv[0], place);
118 place = EMSG;
119 optind++;
120 return BADCH;
121 }
122 }
123 else
124 {
125 optarg = NULL;
126 if (place[namelen] != 0)
127 {
128 /* XXX error? */
129 }
130 }
131
132 optind++;
133
134 if (longindex)
135 *longindex = i;
136
137 place = EMSG;
138
139 if (longopts[i].flag == NULL)
140 return longopts[i].val;
141 else
142 {
143 *longopts[i].flag = longopts[i].val;
144 return 0;
145 }
146 }
147 }
148
149 if (opterr && optstring[0] != ':')
150 fprintf(stderr,
151 "%s: illegal option -- %s\n", argv[0], place);
152 place = EMSG;
153 optind++;
154 return BADCH;
155 }
156 }
157
158 /* short option */
159 optopt = (int) *place++;
160
161 oli = strchr(optstring, optopt);
162 if (!oli)
163 {
164 if (!*place)
165 ++optind;
166 if (opterr && *optstring != ':')
167 fprintf(stderr,
168 "%s: illegal option -- %c\n", argv[0], optopt);
169 return BADCH;
170 }
171
172 if (oli[1] != ':')
173 { /* don't need argument */
174 optarg = NULL;
175 if (!*place)
176 ++optind;
177 }
178 else
179 { /* need an argument */
180 if (*place) /* no white space */
181 optarg = place;
182 else if (argc <= ++optind)
183 { /* no arg */
184 place = EMSG;
185 if (*optstring == ':')
186 return BADARG;
187 if (opterr)
188 fprintf(stderr,
189 "%s: option requires an argument -- %c\n",
190 argv[0], optopt);
191 return BADCH;
192 }
193 else
194 /* white space */
195 optarg = argv[optind];
196 place = EMSG;
197 ++optind;
198 }
199 return optopt;
200 }
201