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1 /* getopt_long and getopt_long_only entry points for GNU getopt.
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145
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2 Copyright (C) 1987-2020 Free Software Foundation, Inc.
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0
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3
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4 NOTE: This source is derived from an old version taken from the GNU C
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5 Library (glibc).
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6
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7 This program is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 This program is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with this program; if not, write to the Free Software
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19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
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20 USA. */
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21
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22 #ifdef HAVE_CONFIG_H
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23 #include <config.h>
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24 #endif
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25
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26 #if !defined __STDC__ || !__STDC__
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27 /* This is a separate conditional since some stdc systems
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28 reject `defined (const)'. */
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29 #ifndef const
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30 #define const
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31 #endif
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32 #endif
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33
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34 #include <stdio.h>
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35
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36 #include "getopt.h"
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37
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38 /* Comment out all this code if we are using the GNU C Library, and are not
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39 actually compiling the library itself. This code is part of the GNU C
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40 Library, but also included in many other GNU distributions. Compiling
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41 and linking in this code is a waste when using the GNU C library
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42 (especially if it is a shared library). Rather than having every GNU
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43 program understand `configure --with-gnu-libc' and omit the object files,
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44 it is simpler to just do this in the source for each such file. */
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45
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46 #define GETOPT_INTERFACE_VERSION 2
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47 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
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48 #include <gnu-versions.h>
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49 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
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50 #define ELIDE_CODE
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51 #endif
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52 #endif
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53
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54 #ifndef ELIDE_CODE
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55
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56
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57 /* This needs to come after some library #include
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58 to get __GNU_LIBRARY__ defined. */
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59 #ifdef __GNU_LIBRARY__
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60 #include <stdlib.h>
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61 #endif
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62
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63 #ifndef NULL
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64 #define NULL 0
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65 #endif
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66
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67 int
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68 getopt_long (int argc, char *const *argv, const char *options,
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69 const struct option *long_options, int *opt_index)
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70 {
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71 return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
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72 }
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73
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74 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
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75 If an option that starts with '-' (not '--') doesn't match a long option,
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76 but does match a short option, it is parsed as a short option
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77 instead. */
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78
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79 int
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80 getopt_long_only (int argc, char *const *argv, const char *options,
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81 const struct option *long_options, int *opt_index)
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82 {
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83 return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
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84 }
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85
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86
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87 #endif /* Not ELIDE_CODE. */
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88
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89 #ifdef TEST
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90
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91 #include <stdio.h>
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92
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93 int
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94 main (int argc, char **argv)
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95 {
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96 int c;
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97 int digit_optind = 0;
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98
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99 while (1)
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100 {
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101 int this_option_optind = optind ? optind : 1;
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102 int option_index = 0;
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103 static struct option long_options[] =
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104 {
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105 {"add", 1, 0, 0},
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106 {"append", 0, 0, 0},
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107 {"delete", 1, 0, 0},
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108 {"verbose", 0, 0, 0},
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109 {"create", 0, 0, 0},
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110 {"file", 1, 0, 0},
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111 {0, 0, 0, 0}
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112 };
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113
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114 c = getopt_long (argc, argv, "abc:d:0123456789",
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115 long_options, &option_index);
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116 if (c == -1)
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117 break;
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118
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119 switch (c)
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120 {
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121 case 0:
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122 printf ("option %s", long_options[option_index].name);
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123 if (optarg)
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124 printf (" with arg %s", optarg);
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125 printf ("\n");
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126 break;
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127
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128 case '0':
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129 case '1':
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130 case '2':
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131 case '3':
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132 case '4':
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133 case '5':
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134 case '6':
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135 case '7':
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136 case '8':
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137 case '9':
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138 if (digit_optind != 0 && digit_optind != this_option_optind)
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139 printf ("digits occur in two different argv-elements.\n");
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140 digit_optind = this_option_optind;
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141 printf ("option %c\n", c);
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142 break;
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143
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144 case 'a':
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145 printf ("option a\n");
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146 break;
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147
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148 case 'b':
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149 printf ("option b\n");
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150 break;
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151
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152 case 'c':
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153 printf ("option c with value `%s'\n", optarg);
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154 break;
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155
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156 case 'd':
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157 printf ("option d with value `%s'\n", optarg);
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158 break;
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159
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160 case '?':
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161 break;
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162
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163 default:
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164 printf ("?? getopt returned character code 0%o ??\n", c);
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165 }
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166 }
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167
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168 if (optind < argc)
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169 {
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170 printf ("non-option ARGV-elements: ");
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171 while (optind < argc)
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172 printf ("%s ", argv[optind++]);
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173 printf ("\n");
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174 }
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175
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176 exit (0);
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177 }
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178
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179 #endif /* TEST */
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