source: GTP/trunk/Lib/Vis/Preprocessing/src/mixkit/getopt.h @ 1097

Revision 1097, 4.7 KB checked in by mattausch, 18 years ago (diff)
Line 
1/* Declarations for getopt.
2   Copyright (C) 1989,90,91,92,93,94,96,97 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 Library General Public License as
7   published by the Free Software Foundation; either version 2 of the
8   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   Library General Public License for more details.
14
15   You should have received a copy of the GNU Library General Public
16   License along with the GNU C Library; see the file COPYING.LIB.  If not,
17   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18   Boston, MA 02111-1307, USA.  */
19
20#ifndef _GETOPT_H
21#define _GETOPT_H 1
22
23#ifdef  __cplusplus
24extern "C" {
25#endif
26
27/* For communication from `getopt' to the caller.
28   When `getopt' finds an option that takes an argument,
29   the argument value is returned here.
30   Also, when `ordering' is RETURN_IN_ORDER,
31   each non-option ARGV-element is returned here.  */
32
33extern char *optarg;
34
35/* Index in ARGV of the next element to be scanned.
36   This is used for communication to and from the caller
37   and for communication between successive calls to `getopt'.
38
39   On entry to `getopt', zero means this is the first call; initialize.
40
41   When `getopt' returns -1, this is the index of the first of the
42   non-option elements that the caller should itself scan.
43
44   Otherwise, `optind' communicates from one call to the next
45   how much of ARGV has been scanned so far.  */
46
47extern int optind;
48
49/* Callers store zero here to inhibit the error message `getopt' prints
50   for unrecognized options.  */
51
52extern int opterr;
53
54/* Set to an option character which was unrecognized.  */
55
56extern int optopt;
57
58/* Describe the long-named options requested by the application.
59   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
60   of `struct option' terminated by an element containing a name which is
61   zero.
62
63   The field `has_arg' is:
64   no_argument          (or 0) if the option does not take an argument,
65   required_argument    (or 1) if the option requires an argument,
66   optional_argument    (or 2) if the option takes an optional argument.
67
68   If the field `flag' is not NULL, it points to a variable that is set
69   to the value given in the field `val' when the option is found, but
70   left unchanged if the option is not found.
71
72   To have a long-named option do something other than set an `int' to
73   a compiled-in constant, such as set a value from `optarg', set the
74   option's `flag' field to zero and its `val' field to a nonzero
75   value (the equivalent single-letter option character, if there is
76   one).  For long options that have a zero `flag' field, `getopt'
77   returns the contents of the `val' field.  */
78
79struct option
80{
81#if defined (__STDC__) && __STDC__
82  const char *name;
83#else
84  char *name;
85#endif
86  /* has_arg can't be an enum because some compilers complain about
87     type mismatches in all the code that assumes it is an int.  */
88  int has_arg;
89  int *flag;
90  int val;
91};
92
93/* Names for the values of the `has_arg' field of `struct option'.  */
94
95#define no_argument             0
96#define required_argument       1
97#define optional_argument       2
98
99#if (defined (__STDC__) && __STDC__) || defined(__cplusplus)
100#if defined(__GNU_LIBRARY__) || defined(WIN32)
101/* Many other libraries have conflicting prototypes for getopt, with
102   differences in the consts, in stdlib.h.  To avoid compilation
103   errors, only prototype getopt for the GNU C library.  */
104extern int getopt (int argc, char *const *argv, const char *shortopts);
105#else /* not __GNU_LIBRARY__ */
106extern int getopt ();
107#endif /* __GNU_LIBRARY__ */
108extern int getopt_long (int argc, char *const *argv, const char *shortopts,
109                        const struct option *longopts, int *longind);
110extern int getopt_long_only (int argc, char *const *argv,
111                             const char *shortopts,
112                             const struct option *longopts, int *longind);
113
114/* Internal only.  Users should not call this directly.  */
115extern int _getopt_internal (int argc, char *const *argv,
116                             const char *shortopts,
117                             const struct option *longopts, int *longind,
118                             int long_only);
119#else /* not __STDC__ */
120extern int getopt ();
121extern int getopt_long ();
122extern int getopt_long_only ();
123
124extern int _getopt_internal ();
125#endif /* __STDC__ */
126
127#ifdef  __cplusplus
128}
129#endif
130
131#endif /* _GETOPT_H */
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