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/cvs/fcrackzip/getopt.h
Revision: 1.1
Committed: Mon Aug 4 07:09:51 2008 UTC (16 years, 4 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: HEAD
Log Message:
initial check-in, also 1.0 check-in

File Contents

# User Rev Content
1 root 1.1 /* Declarations for getopt.
2     Copyright (C) 1989, 90, 91, 92, 93, 94, 96 Free Software Foundation, Inc.
3    
4     This file is part of the GNU C Library. Its master source is NOT part of
5     the C library, however. The master source lives in /gd/gnu/lib.
6    
7     The GNU C Library is free software; you can redistribute it and/or
8     modify it under the terms of the GNU Library General Public License as
9     published by the Free Software Foundation; either version 2 of the
10     License, or (at your option) any later version.
11    
12     The GNU C Library is distributed in the hope that it will be useful,
13     but WITHOUT ANY WARRANTY; without even the implied warranty of
14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15     Library General Public License for more details.
16    
17     You should have received a copy of the GNU Library General Public
18     License along with the GNU C Library; see the file COPYING.LIB. If not,
19     write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20     Boston, MA 02111-1307, USA. */
21    
22     #ifndef _GETOPT_H
23     #define _GETOPT_H 1
24    
25     #ifdef __cplusplus
26     extern "C" {
27     #endif
28    
29     /* For communication from `getopt' to the caller.
30     When `getopt' finds an option that takes an argument,
31     the argument value is returned here.
32     Also, when `ordering' is RETURN_IN_ORDER,
33     each non-option ARGV-element is returned here. */
34    
35     extern char *optarg;
36    
37     /* Index in ARGV of the next element to be scanned.
38     This is used for communication to and from the caller
39     and for communication between successive calls to `getopt'.
40    
41     On entry to `getopt', zero means this is the first call; initialize.
42    
43     When `getopt' returns EOF, this is the index of the first of the
44     non-option elements that the caller should itself scan.
45    
46     Otherwise, `optind' communicates from one call to the next
47     how much of ARGV has been scanned so far. */
48    
49     extern int optind;
50    
51     /* Callers store zero here to inhibit the error message `getopt' prints
52     for unrecognized options. */
53    
54     extern int opterr;
55    
56     /* Set to an option character which was unrecognized. */
57    
58     extern int optopt;
59    
60     /* Describe the long-named options requested by the application.
61     The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
62     of `struct option' terminated by an element containing a name which is
63     zero.
64    
65     The field `has_arg' is:
66     no_argument (or 0) if the option does not take an argument,
67     required_argument (or 1) if the option requires an argument,
68     optional_argument (or 2) if the option takes an optional argument.
69    
70     If the field `flag' is not NULL, it points to a variable that is set
71     to the value given in the field `val' when the option is found, but
72     left unchanged if the option is not found.
73    
74     To have a long-named option do something other than set an `int' to
75     a compiled-in constant, such as set a value from `optarg', set the
76     option's `flag' field to zero and its `val' field to a nonzero
77     value (the equivalent single-letter option character, if there is
78     one). For long options that have a zero `flag' field, `getopt'
79     returns the contents of the `val' field. */
80    
81     struct option
82     {
83     #if defined (__STDC__) && __STDC__
84     const char *name;
85     #else
86     char *name;
87     #endif
88     /* has_arg can't be an enum because some compilers complain about
89     type mismatches in all the code that assumes it is an int. */
90     int has_arg;
91     int *flag;
92     int val;
93     };
94    
95     /* Names for the values of the `has_arg' field of `struct option'. */
96    
97     #define no_argument 0
98     #define required_argument 1
99     #define optional_argument 2
100    
101     #if defined (__STDC__) && __STDC__
102     #ifdef __GNU_LIBRARY__
103     /* Many other libraries have conflicting prototypes for getopt, with
104     differences in the consts, in stdlib.h. To avoid compilation
105     errors, only prototype getopt for the GNU C library. */
106     extern int getopt (int argc, char *const *argv, const char *shortopts);
107     #else /* not __GNU_LIBRARY__ */
108     extern int getopt ();
109     #endif /* __GNU_LIBRARY__ */
110     extern int getopt_long (int argc, char *const *argv, const char *shortopts,
111     const struct option *longopts, int *longind);
112     extern int getopt_long_only (int argc, char *const *argv,
113     const char *shortopts,
114     const struct option *longopts, int *longind);
115    
116     /* Internal only. Users should not call this directly. */
117     extern int _getopt_internal (int argc, char *const *argv,
118     const char *shortopts,
119     const struct option *longopts, int *longind,
120     int long_only);
121     #else /* not __STDC__ */
122     extern int getopt ();
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 */