1 /* getopt_long and getopt_long_only entry points for GNU getopt.
2 Copyright (C) 1987-2023 Free Software Foundation, Inc.
3
4 NOTE: This source is derived from an old version taken from the GNU C
5 Library (glibc).
6
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
10 later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
20 USA. */
21
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
25
26 #if !defined __STDC__ || !__STDC__
27 /* This is a separate conditional since some stdc systems
28 reject `defined (const)'. */
29 #ifndef const
30 #define const
31 #endif
32 #endif
33
34 #include <stdio.h>
35
36 #include "getopt.h"
37
38 /* Comment out all this code if we are using the GNU C Library, and are not
39 actually compiling the library itself. This code is part of the GNU C
40 Library, but also included in many other GNU distributions. Compiling
41 and linking in this code is a waste when using the GNU C library
42 (especially if it is a shared library). Rather than having every GNU
43 program understand `configure --with-gnu-libc' and omit the object files,
44 it is simpler to just do this in the source for each such file. */
45
46 #define GETOPT_INTERFACE_VERSION 2
47 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
48 #include <gnu-versions.h>
49 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
50 #define ELIDE_CODE
51 #endif
52 #endif
53
54 #ifndef ELIDE_CODE
55
56
57 /* This needs to come after some library #include
58 to get __GNU_LIBRARY__ defined. */
59 #ifdef __GNU_LIBRARY__
60 #include <stdlib.h>
61 #endif
62
63 #ifndef NULL
64 #define NULL 0
65 #endif
66
67 int
68 getopt_long (int argc, char *const *argv, const char *options,
69 const struct option *long_options, int *opt_index)
70 {
71 return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
72 }
73
74 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
75 If an option that starts with '-' (not '--') doesn't match a long option,
76 but does match a short option, it is parsed as a short option
77 instead. */
78
79 int
80 getopt_long_only (int argc, char *const *argv, const char *options,
81 const struct option *long_options, int *opt_index)
82 {
83 return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
84 }
85
86
87 #endif /* Not ELIDE_CODE. */
88
89 #ifdef TEST
90
91 #include <stdio.h>
92
93 int
94 main (int argc, char **argv)
95 {
96 int c;
97 int digit_optind = 0;
98
99 while (1)
100 {
101 int this_option_optind = optind ? optind : 1;
102 int option_index = 0;
103 static struct option long_options[] =
104 {
105 {"add", 1, 0, 0},
106 {"append", 0, 0, 0},
107 {"delete", 1, 0, 0},
108 {"verbose", 0, 0, 0},
109 {"create", 0, 0, 0},
110 {"file", 1, 0, 0},
111 {0, 0, 0, 0}
112 };
113
114 c = getopt_long (argc, argv, "abc:d:0123456789",
115 long_options, &option_index);
116 if (c == -1)
117 break;
118
119 switch (c)
120 {
121 case 0:
122 printf ("option %s", long_options[option_index].name);
123 if (optarg)
124 printf (" with arg %s", optarg);
125 printf ("\n");
126 break;
127
128 case '0':
129 case '1':
130 case '2':
131 case '3':
132 case '4':
133 case '5':
134 case '6':
135 case '7':
136 case '8':
137 case '9':
138 if (digit_optind != 0 && digit_optind != this_option_optind)
139 printf ("digits occur in two different argv-elements.\n");
140 digit_optind = this_option_optind;
141 printf ("option %c\n", c);
142 break;
143
144 case 'a':
145 printf ("option a\n");
146 break;
147
148 case 'b':
149 printf ("option b\n");
150 break;
151
152 case 'c':
153 printf ("option c with value `%s'\n", optarg);
154 break;
155
156 case 'd':
157 printf ("option d with value `%s'\n", optarg);
158 break;
159
160 case '?':
161 break;
162
163 default:
164 printf ("?? getopt returned character code 0%o ??\n", c);
165 }
166 }
167
168 if (optind < argc)
169 {
170 printf ("non-option ARGV-elements: ");
171 while (optind < argc)
172 printf ("%s ", argv[optind++]);
173 printf ("\n");
174 }
175
176 exit (0);
177 }
178
179 #endif /* TEST */