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/cvs/gvpe/lib/getopt.h
Revision: 1.5
Committed: Thu Oct 25 03:01:08 2018 UTC (6 years ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: HEAD
Changes since 1.4: +0 -0 lines
State: FILE REMOVED
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File Contents

# Content
1 /* Declarations for getopt.
2 Copyright (C) 1989,90,91,92,93,94,96,97 Free Software Foundation, Inc.
3
4 NOTE: The canonical source of this file is maintained with the GNU C Library.
5 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
6
7 This file is part of GVPE.
8
9 GVPE is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2, or (at your option) any
12 later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with gvpe; if not, write to the Free Software
21 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #ifndef _GETOPT_H
25 #define _GETOPT_H 1
26
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
30
31 /* For communication from `getopt' to the caller.
32 When `getopt' finds an option that takes an argument,
33 the argument value is returned here.
34 Also, when `ordering' is RETURN_IN_ORDER,
35 each non-option ARGV-element is returned here. */
36
37 extern char *optarg;
38
39 /* Index in ARGV of the next element to be scanned.
40 This is used for communication to and from the caller
41 and for communication between successive calls to `getopt'.
42
43 On entry to `getopt', zero means this is the first call; initialize.
44
45 When `getopt' returns -1, this is the index of the first of the
46 non-option elements that the caller should itself scan.
47
48 Otherwise, `optind' communicates from one call to the next
49 how much of ARGV has been scanned so far. */
50
51 extern int optind;
52
53 /* Callers store zero here to inhibit the error message `getopt' prints
54 for unrecognized options. */
55
56 extern int opterr;
57
58 /* Set to an option character which was unrecognized. */
59
60 extern int optopt;
61
62 /* Describe the long-named options requested by the application.
63 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
64 of `struct option' terminated by an element containing a name which is
65 zero.
66
67 The field `has_arg' is:
68 no_argument (or 0) if the option does not take an argument,
69 required_argument (or 1) if the option requires an argument,
70 optional_argument (or 2) if the option takes an optional argument.
71
72 If the field `flag' is not NULL, it points to a variable that is set
73 to the value given in the field `val' when the option is found, but
74 left unchanged if the option is not found.
75
76 To have a long-named option do something other than set an `int' to
77 a compiled-in constant, such as set a value from `optarg', set the
78 option's `flag' field to zero and its `val' field to a nonzero
79 value (the equivalent single-letter option character, if there is
80 one). For long options that have a zero `flag' field, `getopt'
81 returns the contents of the `val' field. */
82
83 struct option
84 {
85 #if defined (__STDC__) && __STDC__
86 const char *name;
87 #else
88 char *name;
89 #endif
90 /* has_arg can't be an enum because some compilers complain about
91 type mismatches in all the code that assumes it is an int. */
92 int has_arg;
93 int *flag;
94 int val;
95 };
96
97 /* Names for the values of the `has_arg' field of `struct option'. */
98
99 #define no_argument 0
100 #define required_argument 1
101 #define optional_argument 2
102
103 #if defined (__STDC__) && __STDC__
104 #ifdef __GNU_LIBRARY__
105 /* Many other libraries have conflicting prototypes for getopt, with
106 differences in the consts, in stdlib.h. To avoid compilation
107 errors, only prototype getopt for the GNU C library. */
108 extern int getopt (int argc, char *const *argv, const char *shortopts);
109 #else /* not __GNU_LIBRARY__ */
110 #endif /* __GNU_LIBRARY__ */
111 extern int getopt_long (int argc, char *const *argv, const char *shortopts,
112 const struct option *longopts, int *longind);
113 extern int getopt_long_only (int argc, char *const *argv,
114 const char *shortopts,
115 const struct option *longopts, int *longind);
116
117 /* Internal only. Users should not call this directly. */
118 extern int _getopt_internal (int argc, char *const *argv,
119 const char *shortopts,
120 const struct option *longopts, int *longind,
121 int long_only);
122 #else /* not __STDC__ */
123 extern int getopt_long ();
124 extern int getopt_long_only ();
125
126 extern int _getopt_internal ();
127 #endif /* __STDC__ */
128
129 #ifdef __cplusplus
130 }
131 #endif
132
133 #endif /* _GETOPT_H */