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comparison mupdf-source/thirdparty/zint/getopt/getopt.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /* Declarations for getopt.
2
3 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998,
4 1999, 2001, 2003 Free Software Foundation, Inc.
5
6 This file is part of the GNU C Library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any 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 along
19 with this program; if not, write to the Free Software Foundation,
20 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
21
22 #ifndef _GETOPT_H
23
24 #ifndef __need_getopt
25 # define _GETOPT_H 1
26 #endif
27
28 /* If __GNU_LIBRARY__ is not already defined, either we are being used
29 standalone, or this is the first header included in the source file.
30 If we are being used with glibc, we need to include <features.h>, but
31 that does not exist if we are standalone. So: if __GNU_LIBRARY__ is
32 not defined, include <ctype.h>, which will pull in <features.h> for us
33 if it's from glibc. (Why ctype.h? It's guaranteed to exist and it
34 doesn't flood the namespace with stuff the way some other headers do.) */
35 #if !defined __GNU_LIBRARY__
36 # include <ctype.h>
37 #endif
38
39 #ifdef __cplusplus
40 extern "C" {
41 #endif
42
43 /* For communication from `getopt' to the caller.
44 When `getopt' finds an option that takes an argument,
45 the argument value is returned here.
46 Also, when `ordering' is RETURN_IN_ORDER,
47 each non-option ARGV-element is returned here. */
48
49 extern char *optarg;
50
51 /* Index in ARGV of the next element to be scanned.
52 This is used for communication to and from the caller
53 and for communication between successive calls to `getopt'.
54
55 On entry to `getopt', zero means this is the first call; initialize.
56
57 When `getopt' returns -1, this is the index of the first of the
58 non-option elements that the caller should itself scan.
59
60 Otherwise, `optind' communicates from one call to the next
61 how much of ARGV has been scanned so far. */
62
63 extern int optind;
64
65 /* Callers store zero here to inhibit the error message `getopt' prints
66 for unrecognized options. */
67
68 extern int opterr;
69
70 /* Set to an option character which was unrecognized. */
71
72 extern int optopt;
73
74 #ifndef __need_getopt
75 /* Describe the long-named options requested by the application.
76 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
77 of `struct option' terminated by an element containing a name which is
78 zero.
79
80 The field `has_arg' is:
81 no_argument (or 0) if the option does not take an argument,
82 required_argument (or 1) if the option requires an argument,
83 optional_argument (or 2) if the option takes an optional argument.
84
85 If the field `flag' is not NULL, it points to a variable that is set
86 to the value given in the field `val' when the option is found, but
87 left unchanged if the option is not found.
88
89 To have a long-named option do something other than set an `int' to
90 a compiled-in constant, such as set a value from `optarg', set the
91 option's `flag' field to zero and its `val' field to a nonzero
92 value (the equivalent single-letter option character, if there is
93 one). For long options that have a zero `flag' field, `getopt'
94 returns the contents of the `val' field. */
95
96 struct option
97 {
98 const char *name;
99 /* has_arg can't be an enum because some compilers complain about
100 type mismatches in all the code that assumes it is an int. */
101 int has_arg;
102 int *flag;
103 int val;
104 };
105
106 /* Names for the values of the `has_arg' field of `struct option'. */
107
108 # define no_argument 0
109 # define required_argument 1
110 # define optional_argument 2
111 #endif /* need getopt */
112
113
114 /* Get definitions and prototypes for functions to process the
115 arguments in ARGV (ARGC of them, minus the program name) for
116 options given in OPTS.
117
118 Return the option character from OPTS just read. Return -1 when
119 there are no more options. For unrecognized options, or options
120 missing arguments, `optopt' is set to the option letter, and '?' is
121 returned.
122
123 The OPTS string is a list of characters which are recognized option
124 letters, optionally followed by colons, specifying that that letter
125 takes an argument, to be placed in `optarg'.
126
127 If a letter in OPTS is followed by two colons, its argument is
128 optional. This behavior is specific to the GNU `getopt'.
129
130 The argument `--' causes premature termination of argument
131 scanning, explicitly telling `getopt' that there are no more
132 options.
133
134 If OPTS begins with `--', then non-option arguments are treated as
135 arguments to the option '\0'. This behavior is specific to the GNU
136 `getopt'. */
137
138 /* zint: prototype it always to avoid warning `-Wdeprecated-non-prototype` (will be error in C2x) */
139 #if 1 /* was #ifdef __GNU_LIBRARY__ */
140 /* Many other libraries have conflicting prototypes for getopt, with
141 differences in the consts, in stdlib.h. To avoid compilation
142 errors, only prototype getopt for the GNU C library. */
143 extern int getopt (int ___argc, char *const *___argv, const char *__shortopts);
144 #else /* not __GNU_LIBRARY__ */
145 extern int getopt ();
146 #endif /* __GNU_LIBRARY__ */
147
148 #ifndef __need_getopt
149 extern int getopt_long (int ___argc, char *const *___argv,
150 const char *__shortopts,
151 const struct option *__longopts, int *__longind);
152 extern int getopt_long_only (int ___argc, char *const *___argv,
153 const char *__shortopts,
154 const struct option *__longopts, int *__longind);
155
156 /* Internal only. Users should not call this directly. */
157 extern int _getopt_internal (int ___argc, char *const *___argv,
158 const char *__shortopts,
159 const struct option *__longopts, int *__longind,
160 int __long_only);
161 #endif
162
163 #ifdef __cplusplus
164 }
165 #endif
166
167 /* Make sure we later can get all the definitions and declarations. */
168 #undef __need_getopt
169
170 #endif /* getopt.h */