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1 | /* Declarations for getopt. | ||
2 | Copyright (C) 1989, 90, 91, 92, 93, 94 Free Software Foundation, Inc. | ||
3 | |||
4 | This program is free software; you can redistribute it and/or modify it | ||
5 | under the terms of the GNU General Public License as published by the | ||
6 | Free Software Foundation; either version 2, or (at your option) any | ||
7 | later version. | ||
8 | |||
9 | This program is distributed in the hope that it will be useful, | ||
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | GNU General Public License for more details. | ||
13 | |||
14 | You should have received a copy of the GNU General Public License | ||
15 | along with this program; if not, write to the Free Software | ||
16 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | ||
17 | |||
18 | #ifndef _GETOPT_H | ||
19 | #define _GETOPT_H 1 | ||
20 | |||
21 | #ifdef __cplusplus | ||
22 | extern "C" { | ||
23 | #endif | ||
24 | |||
25 | /* For communication from `getopt' to the caller. | ||
26 | When `getopt' finds an option that takes an argument, | ||
27 | the argument value is returned here. | ||
28 | Also, when `ordering' is RETURN_IN_ORDER, | ||
29 | each non-option ARGV-element is returned here. */ | ||
30 | |||
31 | extern char *optarg; | ||
32 | |||
33 | /* Index in ARGV of the next element to be scanned. | ||
34 | This is used for communication to and from the caller | ||
35 | and for communication between successive calls to `getopt'. | ||
36 | |||
37 | On entry to `getopt', zero means this is the first call; initialize. | ||
38 | |||
39 | When `getopt' returns EOF, this is the index of the first of the | ||
40 | non-option elements that the caller should itself scan. | ||
41 | |||
42 | Otherwise, `optind' communicates from one call to the next | ||
43 | how much of ARGV has been scanned so far. */ | ||
44 | |||
45 | extern int optind; | ||
46 | |||
47 | /* Callers store zero here to inhibit the error message `getopt' prints | ||
48 | for unrecognized options. */ | ||
49 | |||
50 | extern int opterr; | ||
51 | |||
52 | /* Set to an option character which was unrecognized. */ | ||
53 | |||
54 | extern int optopt; | ||
55 | |||
56 | /* Describe the long-named options requested by the application. | ||
57 | The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector | ||
58 | of `struct option' terminated by an element containing a name which is | ||
59 | zero. | ||
60 | |||
61 | The field `has_arg' is: | ||
62 | no_argument (or 0) if the option does not take an argument, | ||
63 | required_argument (or 1) if the option requires an argument, | ||
64 | optional_argument (or 2) if the option takes an optional argument. | ||
65 | |||
66 | If the field `flag' is not NULL, it points to a variable that is set | ||
67 | to the value given in the field `val' when the option is found, but | ||
68 | left unchanged if the option is not found. | ||
69 | |||
70 | To have a long-named option do something other than set an `int' to | ||
71 | a compiled-in constant, such as set a value from `optarg', set the | ||
72 | option's `flag' field to zero and its `val' field to a nonzero | ||
73 | value (the equivalent single-letter option character, if there is | ||
74 | one). For long options that have a zero `flag' field, `getopt' | ||
75 | returns the contents of the `val' field. */ | ||
76 | |||
77 | struct option | ||
78 | { | ||
79 | #if defined (__STDC__) && __STDC__ | ||
80 | const char *name; | ||
81 | #else | ||
82 | char *name; | ||
83 | #endif | ||
84 | /* has_arg can't be an enum because some compilers complain about | ||
85 | type mismatches in all the code that assumes it is an int. */ | ||
86 | int has_arg; | ||
87 | int *flag; | ||
88 | int val; | ||
89 | }; | ||
90 | |||
91 | /* Names for the values of the `has_arg' field of `struct option'. */ | ||
92 | |||
93 | #define no_argument 0 | ||
94 | #define required_argument 1 | ||
95 | #define optional_argument 2 | ||
96 | |||
97 | #if defined (__STDC__) && __STDC__ | ||
98 | #ifdef __GNU_LIBRARY__ | ||
99 | /* Many other libraries have conflicting prototypes for getopt, with | ||
100 | differences in the consts, in stdlib.h. To avoid compilation | ||
101 | errors, only prototype getopt for the GNU C library. */ | ||
102 | extern int getopt (int argc, char *const *argv, const char *shortopts); | ||
103 | #else /* not __GNU_LIBRARY__ */ | ||
104 | extern int getopt (); | ||
105 | #endif /* __GNU_LIBRARY__ */ | ||
106 | extern int getopt_long (int argc, char *const *argv, const char *shortopts, | ||
107 | const struct option *longopts, int *longind); | ||
108 | extern int getopt_long_only (int argc, char *const *argv, | ||
109 | const char *shortopts, | ||
110 | const struct option *longopts, int *longind); | ||
111 | |||
112 | /* Internal only. Users should not call this directly. */ | ||
113 | extern int _getopt_internal (int argc, char *const *argv, | ||
114 | const char *shortopts, | ||
115 | const struct option *longopts, int *longind, | ||
116 | int long_only); | ||
117 | #else /* not __STDC__ */ | ||
118 | extern int getopt (); | ||
119 | extern int getopt_long (); | ||
120 | extern int getopt_long_only (); | ||
121 | |||
122 | extern int _getopt_internal (); | ||
123 | #endif /* __STDC__ */ | ||
124 | |||
125 | #ifdef __cplusplus | ||
126 | } | ||
127 | #endif | ||
128 | |||
129 | #endif /* _GETOPT_H */ | ||