1 /* getopt_long and getopt_long_only entry points for GNU getopt.
2 Copyright (C) 1987-1994, 1996-2022 Free Software Foundation, Inc.
3
4 NOTE: The canonical source of this file is maintained with the GNU C Library.
5 Bugs can be reported to bug-glibc@gnu.org.
6
7 GNU Make is free software; you can redistribute it and/or modify it under the
8 terms of the GNU General Public License as published by the Free Software
9 Foundation; either version 3 of the License, or (at your option) any later
10 version.
11
12 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 A PARTICULAR PURPOSE. See the GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License along with
17 this program. If not, see <https://www.gnu.org/licenses/>. */
18
19 #ifdef HAVE_CONFIG_H
20 #include <config.h>
21 #endif
22
23 #include "getopt.h"
24
25 #if !defined __STDC__ || !__STDC__
26 /* This is a separate conditional since some stdc systems
27 reject `defined (const)'. */
28 #ifndef const
29 #define const
30 #endif
31 #endif
32
33 #include <stdio.h>
34
35 /* Comment out all this code if we are using the GNU C Library, and are not
36 actually compiling the library itself. This code is part of the GNU C
37 Library, but also included in many other GNU distributions. Compiling
38 and linking in this code is a waste when using the GNU C library
39 (especially if it is a shared library). Rather than having every GNU
40 program understand `configure --with-gnu-libc' and omit the object files,
41 it is simpler to just do this in the source for each such file. */
42
43 #define GETOPT_INTERFACE_VERSION 2
44 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
45 #include <gnu-versions.h>
46 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
47 #define ELIDE_CODE
48 #endif
49 #endif
50
51 #ifndef ELIDE_CODE
52
53
54 /* This needs to come after some library #include
55 to get __GNU_LIBRARY__ defined. */
56 #ifdef __GNU_LIBRARY__
57 #include <stdlib.h>
58 #endif
59
60 #ifndef NULL
61 #define NULL 0
62 #endif
63
64 int
65 getopt_long (int argc, char *const *argv, const char *options,
66 const struct option *long_options, int *opt_index)
67 {
68 return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
69 }
70
71 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
72 If an option that starts with '-' (not '--') doesn't match a long option,
73 but does match a short option, it is parsed as a short option
74 instead. */
75
76 int
77 getopt_long_only (int argc, char *const *argv, const char *options,
78 const struct option *long_options, int *opt_index)
79 {
80 return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
81 }
82
83
84 #endif /* Not ELIDE_CODE. */
85
86 #ifdef TEST
87
88 #include <stdio.h>
89
90 int
91 main (int argc, char **argv)
92 {
93 int c;
94 int digit_optind = 0;
95
96 while (1)
97 {
98 int this_option_optind = optind ? optind : 1;
99 int option_index = 0;
100 static struct option long_options[] =
101 {
102 {"add", 1, 0, 0},
103 {"append", 0, 0, 0},
104 {"delete", 1, 0, 0},
105 {"verbose", 0, 0, 0},
106 {"create", 0, 0, 0},
107 {"file", 1, 0, 0},
108 {0, 0, 0, 0}
109 };
110
111 c = getopt_long (argc, argv, "abc:d:0123456789",
112 long_options, &option_index);
113 if (c == -1)
114 break;
115
116 switch (c)
117 {
118 case 0:
119 printf ("option %s", long_options[option_index].name);
120 if (optarg)
121 printf (" with arg %s", optarg);
122 printf ("\n");
123 break;
124
125 case '0':
126 case '1':
127 case '2':
128 case '3':
129 case '4':
130 case '5':
131 case '6':
132 case '7':
133 case '8':
134 case '9':
135 if (digit_optind != 0 && digit_optind != this_option_optind)
136 printf ("digits occur in two different argv-elements.\n");
137 digit_optind = this_option_optind;
138 printf ("option %c\n", c);
139 break;
140
141 case 'a':
142 printf ("option a\n");
143 break;
144
145 case 'b':
146 printf ("option b\n");
147 break;
148
149 case 'c':
150 printf ("option c with value '%s'\n", optarg);
151 break;
152
153 case 'd':
154 printf ("option d with value '%s'\n", optarg);
155 break;
156
157 case '?':
158 break;
159
160 default:
161 printf ("?? getopt returned character code 0%o ??\n", c);
162 }
163 }
164
165 if (optind < argc)
166 {
167 printf ("non-option ARGV-elements: ");
168 while (optind < argc)
169 printf ("%s ", argv[optind++]);
170 printf ("\n");
171 }
172
173 exit (0);
174 }
175
176 #endif /* TEST */