1 /* getopt_long and getopt_long_only entry points for GNU getopt.
2    Copyright (C) 1987,88,89,90,91,92,93,94,96,97,98,2005
3      Free Software Foundation, Inc.
4 
5    NOTE: This source is derived from an old version taken from the GNU C
6    Library (glibc).
7 
8    This program is free software; you can redistribute it and/or modify it
9    under the terms of the GNU General Public License as published by the
10    Free Software Foundation; either version 2, or (at your option) any
11    later version.
12 
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17 
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
21    USA.  */
22 
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26 
27 #if !defined __STDC__ || !__STDC__
28 /* This is a separate conditional since some stdc systems
29    reject `defined (const)'.  */
30 #ifndef const
31 #define const
32 #endif
33 #endif
34 
35 #include <stdio.h>
36 
37 #include "getopt.h"
38 
39 /* Comment out all this code if we are using the GNU C Library, and are not
40    actually compiling the library itself.  This code is part of the GNU C
41    Library, but also included in many other GNU distributions.  Compiling
42    and linking in this code is a waste when using the GNU C library
43    (especially if it is a shared library).  Rather than having every GNU
44    program understand `configure --with-gnu-libc' and omit the object files,
45    it is simpler to just do this in the source for each such file.  */
46 
47 #define GETOPT_INTERFACE_VERSION 2
48 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
49 #include <gnu-versions.h>
50 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
51 #define ELIDE_CODE
52 #endif
53 #endif
54 
55 #ifndef ELIDE_CODE
56 
57 
58 /* This needs to come after some library #include
59    to get __GNU_LIBRARY__ defined.  */
60 #ifdef __GNU_LIBRARY__
61 #include <stdlib.h>
62 #endif
63 
64 #ifndef	NULL
65 #define NULL 0
66 #endif
67 
68 int
69 getopt_long (int argc,  char *const *argv,  const char *options,
70              const struct option *long_options, int *opt_index)
71 {
72   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
73 }
74 
75 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
76    If an option that starts with '-' (not '--') doesn't match a long option,
77    but does match a short option, it is parsed as a short option
78    instead.  */
79 
80 int
81 getopt_long_only (int argc, char *const *argv, const char *options,
82                   const struct option *long_options, int *opt_index)
83 {
84   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
85 }
86 
87 
88 #endif	/* Not ELIDE_CODE.  */
89 
90 #ifdef TEST
91 
92 #include <stdio.h>
93 
94 int
95 main (int argc, char **argv)
96 {
97   int c;
98   int digit_optind = 0;
99 
100   while (1)
101     {
102       int this_option_optind = optind ? optind : 1;
103       int option_index = 0;
104       static struct option long_options[] =
105       {
106 	{"add", 1, 0, 0},
107 	{"append", 0, 0, 0},
108 	{"delete", 1, 0, 0},
109 	{"verbose", 0, 0, 0},
110 	{"create", 0, 0, 0},
111 	{"file", 1, 0, 0},
112 	{0, 0, 0, 0}
113       };
114 
115       c = getopt_long (argc, argv, "abc:d:0123456789",
116 		       long_options, &option_index);
117       if (c == -1)
118 	break;
119 
120       switch (c)
121 	{
122 	case 0:
123 	  printf ("option %s", long_options[option_index].name);
124 	  if (optarg)
125 	    printf (" with arg %s", optarg);
126 	  printf ("\n");
127 	  break;
128 
129 	case '0':
130 	case '1':
131 	case '2':
132 	case '3':
133 	case '4':
134 	case '5':
135 	case '6':
136 	case '7':
137 	case '8':
138 	case '9':
139 	  if (digit_optind != 0 && digit_optind != this_option_optind)
140 	    printf ("digits occur in two different argv-elements.\n");
141 	  digit_optind = this_option_optind;
142 	  printf ("option %c\n", c);
143 	  break;
144 
145 	case 'a':
146 	  printf ("option a\n");
147 	  break;
148 
149 	case 'b':
150 	  printf ("option b\n");
151 	  break;
152 
153 	case 'c':
154 	  printf ("option c with value `%s'\n", optarg);
155 	  break;
156 
157 	case 'd':
158 	  printf ("option d with value `%s'\n", optarg);
159 	  break;
160 
161 	case '?':
162 	  break;
163 
164 	default:
165 	  printf ("?? getopt returned character code 0%o ??\n", c);
166 	}
167     }
168 
169   if (optind < argc)
170     {
171       printf ("non-option ARGV-elements: ");
172       while (optind < argc)
173 	printf ("%s ", argv[optind++]);
174       printf ("\n");
175     }
176 
177   exit (0);
178 }
179 
180 #endif /* TEST */
181