Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/zint/getopt/getopt.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 /* Declarations for getopt.
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3 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998,
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4 1999, 2001, 2003 Free Software Foundation, Inc.
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6 This file is part of the GNU C Library.
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8 This program is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 2, or (at your option)
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11 any later version.
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13 This program is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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18 You should have received a copy of the GNU General Public License along
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19 with this program; if not, write to the Free Software Foundation,
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20 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
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22 #ifndef _GETOPT_H
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24 #ifndef __need_getopt
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25 # define _GETOPT_H 1
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26 #endif
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28 /* If __GNU_LIBRARY__ is not already defined, either we are being used
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29 standalone, or this is the first header included in the source file.
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30 If we are being used with glibc, we need to include <features.h>, but
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31 that does not exist if we are standalone. So: if __GNU_LIBRARY__ is
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32 not defined, include <ctype.h>, which will pull in <features.h> for us
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33 if it's from glibc. (Why ctype.h? It's guaranteed to exist and it
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34 doesn't flood the namespace with stuff the way some other headers do.) */
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35 #if !defined __GNU_LIBRARY__
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36 # include <ctype.h>
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37 #endif
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39 #ifdef __cplusplus
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40 extern "C" {
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41 #endif
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43 /* For communication from `getopt' to the caller.
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44 When `getopt' finds an option that takes an argument,
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45 the argument value is returned here.
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46 Also, when `ordering' is RETURN_IN_ORDER,
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47 each non-option ARGV-element is returned here. */
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49 extern char *optarg;
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51 /* Index in ARGV of the next element to be scanned.
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52 This is used for communication to and from the caller
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53 and for communication between successive calls to `getopt'.
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55 On entry to `getopt', zero means this is the first call; initialize.
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57 When `getopt' returns -1, this is the index of the first of the
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58 non-option elements that the caller should itself scan.
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60 Otherwise, `optind' communicates from one call to the next
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61 how much of ARGV has been scanned so far. */
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63 extern int optind;
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65 /* Callers store zero here to inhibit the error message `getopt' prints
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66 for unrecognized options. */
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68 extern int opterr;
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70 /* Set to an option character which was unrecognized. */
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72 extern int optopt;
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74 #ifndef __need_getopt
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75 /* Describe the long-named options requested by the application.
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76 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
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77 of `struct option' terminated by an element containing a name which is
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78 zero.
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80 The field `has_arg' is:
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81 no_argument (or 0) if the option does not take an argument,
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82 required_argument (or 1) if the option requires an argument,
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83 optional_argument (or 2) if the option takes an optional argument.
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85 If the field `flag' is not NULL, it points to a variable that is set
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86 to the value given in the field `val' when the option is found, but
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87 left unchanged if the option is not found.
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89 To have a long-named option do something other than set an `int' to
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90 a compiled-in constant, such as set a value from `optarg', set the
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91 option's `flag' field to zero and its `val' field to a nonzero
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92 value (the equivalent single-letter option character, if there is
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93 one). For long options that have a zero `flag' field, `getopt'
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94 returns the contents of the `val' field. */
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96 struct option
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97 {
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98 const char *name;
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99 /* has_arg can't be an enum because some compilers complain about
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100 type mismatches in all the code that assumes it is an int. */
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101 int has_arg;
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102 int *flag;
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103 int val;
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104 };
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105
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106 /* Names for the values of the `has_arg' field of `struct option'. */
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107
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108 # define no_argument 0
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109 # define required_argument 1
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110 # define optional_argument 2
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111 #endif /* need getopt */
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112
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113
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114 /* Get definitions and prototypes for functions to process the
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115 arguments in ARGV (ARGC of them, minus the program name) for
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116 options given in OPTS.
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117
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118 Return the option character from OPTS just read. Return -1 when
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119 there are no more options. For unrecognized options, or options
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120 missing arguments, `optopt' is set to the option letter, and '?' is
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121 returned.
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122
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123 The OPTS string is a list of characters which are recognized option
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124 letters, optionally followed by colons, specifying that that letter
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125 takes an argument, to be placed in `optarg'.
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126
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127 If a letter in OPTS is followed by two colons, its argument is
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128 optional. This behavior is specific to the GNU `getopt'.
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129
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130 The argument `--' causes premature termination of argument
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131 scanning, explicitly telling `getopt' that there are no more
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132 options.
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133
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134 If OPTS begins with `--', then non-option arguments are treated as
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135 arguments to the option '\0'. This behavior is specific to the GNU
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136 `getopt'. */
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137
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138 /* zint: prototype it always to avoid warning `-Wdeprecated-non-prototype` (will be error in C2x) */
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139 #if 1 /* was #ifdef __GNU_LIBRARY__ */
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140 /* Many other libraries have conflicting prototypes for getopt, with
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141 differences in the consts, in stdlib.h. To avoid compilation
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142 errors, only prototype getopt for the GNU C library. */
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143 extern int getopt (int ___argc, char *const *___argv, const char *__shortopts);
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144 #else /* not __GNU_LIBRARY__ */
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145 extern int getopt ();
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146 #endif /* __GNU_LIBRARY__ */
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147
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148 #ifndef __need_getopt
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149 extern int getopt_long (int ___argc, char *const *___argv,
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150 const char *__shortopts,
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151 const struct option *__longopts, int *__longind);
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152 extern int getopt_long_only (int ___argc, char *const *___argv,
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153 const char *__shortopts,
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154 const struct option *__longopts, int *__longind);
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155
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156 /* Internal only. Users should not call this directly. */
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157 extern int _getopt_internal (int ___argc, char *const *___argv,
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158 const char *__shortopts,
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159 const struct option *__longopts, int *__longind,
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160 int __long_only);
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161 #endif
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162
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163 #ifdef __cplusplus
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164 }
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165 #endif
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166
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167 /* Make sure we later can get all the definitions and declarations. */
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168 #undef __need_getopt
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169
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170 #endif /* getopt.h */