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comparison mupdf-source/thirdparty/jbig2dec/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 Copyright (C) 1989-1994, 1996-1999, 2001 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
19
20 #ifndef _GETOPT_H
21
22 #ifndef __need_getopt
23 # define _GETOPT_H 1
24 #endif
25
26 /* If __GNU_LIBRARY__ is not already defined, either we are being used
27 standalone, or this is the first header included in the source file.
28 If we are being used with glibc, we need to include <features.h>, but
29 that does not exist if we are standalone. So: if __GNU_LIBRARY__ is
30 not defined, include <ctype.h>, which will pull in <features.h> for us
31 if it's from glibc. (Why ctype.h? It's guaranteed to exist and it
32 doesn't flood the namespace with stuff the way some other headers do.) */
33 #if !defined __GNU_LIBRARY__
34 # include <ctype.h>
35 #endif
36
37 #ifdef __cplusplus
38 extern "C"
39 {
40 #endif
41
42 /* For communication from `getopt' to the caller.
43 When `getopt' finds an option that takes an argument,
44 the argument value is returned here.
45 Also, when `ordering' is RETURN_IN_ORDER,
46 each non-option ARGV-element is returned here. */
47
48 extern char *optarg;
49
50 /* Index in ARGV of the next element to be scanned.
51 This is used for communication to and from the caller
52 and for communication between successive calls to `getopt'.
53
54 On entry to `getopt', zero means this is the first call; initialize.
55
56 When `getopt' returns -1, this is the index of the first of the
57 non-option elements that the caller should itself scan.
58
59 Otherwise, `optind' communicates from one call to the next
60 how much of ARGV has been scanned so far. */
61
62 extern int optind;
63
64 /* Callers store zero here to inhibit the error message `getopt' prints
65 for unrecognized options. */
66
67 extern int opterr;
68
69 /* Set to an option character which was unrecognized. */
70
71 extern int optopt;
72
73 #ifndef __need_getopt
74 /* Describe the long-named options requested by the application.
75 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
76 of `struct option' terminated by an element containing a name which is
77 zero.
78
79 The field `has_arg' is:
80 no_argument (or 0) if the option does not take an argument,
81 required_argument (or 1) if the option requires an argument,
82 optional_argument (or 2) if the option takes an optional argument.
83
84 If the field `flag' is not NULL, it points to a variable that is set
85 to the value given in the field `val' when the option is found, but
86 left unchanged if the option is not found.
87
88 To have a long-named option do something other than set an `int' to
89 a compiled-in constant, such as set a value from `optarg', set the
90 option's `flag' field to zero and its `val' field to a nonzero
91 value (the equivalent single-letter option character, if there is
92 one). For long options that have a zero `flag' field, `getopt'
93 returns the contents of the `val' field. */
94
95 struct option {
96 # if (defined __STDC__ && __STDC__) || defined __cplusplus
97 const char *name;
98 # else
99 char *name;
100 # endif
101 /* has_arg can't be an enum because some compilers complain about
102 type mismatches in all the code that assumes it is an int. */
103 int has_arg;
104 int *flag;
105 int val;
106 };
107
108 /* Names for the values of the `has_arg' field of `struct option'. */
109
110 # define no_argument 0
111 # define required_argument 1
112 # define optional_argument 2
113 #endif /* need getopt */
114
115 /* Get definitions and prototypes for functions to process the
116 arguments in ARGV (ARGC of them, minus the program name) for
117 options given in OPTS.
118
119 Return the option character from OPTS just read. Return -1 when
120 there are no more options. For unrecognized options, or options
121 missing arguments, `optopt' is set to the option letter, and '?' is
122 returned.
123
124 The OPTS string is a list of characters which are recognized option
125 letters, optionally followed by colons, specifying that that letter
126 takes an argument, to be placed in `optarg'.
127
128 If a letter in OPTS is followed by two colons, its argument is
129 optional. This behavior is specific to the GNU `getopt'.
130
131 The argument `--' causes premature termination of argument
132 scanning, explicitly telling `getopt' that there are no more
133 options.
134
135 If OPTS begins with `--', then non-option arguments are treated as
136 arguments to the option '\0'. This behavior is specific to the GNU
137 `getopt'. */
138
139 #if (defined __STDC__ && __STDC__) || defined __cplusplus
140 # ifdef __GNU_LIBRARY__
141 /* Many other libraries have conflicting prototypes for getopt, with
142 differences in the consts, in stdlib.h. To avoid compilation
143 errors, only prototype getopt for the GNU C library. */
144 extern int getopt(int __argc, char *const *__argv, const char *__shortopts);
145 # else /* not __GNU_LIBRARY__ */
146 extern int getopt();
147 # endif /* __GNU_LIBRARY__ */
148
149 # ifndef __need_getopt
150 extern int getopt_long(int __argc, char *const *__argv, const char *__shortopts, const struct option *__longopts, int *__longind);
151 extern int getopt_long_only(int __argc, char *const *__argv, const char *__shortopts, const struct option *__longopts, int *__longind);
152
153 /* Internal only. Users should not call this directly. */
154 extern int _getopt_internal(int __argc, char *const *__argv, const char *__shortopts, const struct option *__longopts, int *__longind, int __long_only);
155 # endif
156 #else /* not __STDC__ */
157 extern int getopt();
158 # ifndef __need_getopt
159 extern int getopt_long();
160 extern int getopt_long_only();
161
162 extern int _getopt_internal();
163 # endif
164 #endif /* __STDC__ */
165
166 #ifdef __cplusplus
167 }
168 #endif
169
170 /* Make sure we later can get all the definitions and declarations. */
171 #undef __need_getopt
172
173 #endif /* getopt.h */