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15637ed4 RG |
1 | /* declarations for getopt |
2 | Copyright (C) 1989, 1990 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 1, or (at your option) | |
7 | any 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, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
17 | ||
18 | /* For communication from `getopt' to the caller. | |
19 | When `getopt' finds an option that takes an argument, | |
20 | the argument value is returned here. | |
21 | Also, when `ordering' is RETURN_IN_ORDER, | |
22 | each non-option ARGV-element is returned here. */ | |
23 | ||
24 | extern char *optarg; | |
25 | ||
26 | /* Index in ARGV of the next element to be scanned. | |
27 | This is used for communication to and from the caller | |
28 | and for communication between successive calls to `getopt'. | |
29 | ||
30 | On entry to `getopt', zero means this is the first call; initialize. | |
31 | ||
32 | When `getopt' returns EOF, this is the index of the first of the | |
33 | non-option elements that the caller should itself scan. | |
34 | ||
35 | Otherwise, `optind' communicates from one call to the next | |
36 | how much of ARGV has been scanned so far. */ | |
37 | ||
38 | extern int optind; | |
39 | ||
40 | /* Callers store zero here to inhibit the error message `getopt' prints | |
41 | for unrecognized options. */ | |
42 | ||
43 | extern int opterr; | |
44 | ||
45 | /* Describe the long-named options requested by the application. | |
46 | _GETOPT_LONG_OPTIONS is a vector of `struct option' terminated by an | |
47 | element containing a name which is zero. | |
48 | ||
49 | The field `has_arg' is: | |
50 | 0 if the option does not take an argument, | |
51 | 1 if the option requires an argument, | |
52 | 2 if the option takes an optional argument. | |
53 | ||
54 | If the field `flag' is nonzero, it points to a variable that is set | |
55 | to the value given in the field `val' when the option is found, but | |
56 | left unchanged if the option is not found. | |
57 | ||
58 | To have a long-named option do something other than set an `int' to | |
59 | a compiled-in constant, such as set a value from `optarg', set the | |
60 | option's `flag' field to zero and its `val' field to a nonzero | |
61 | value (the equivalent single-letter option character, if there is | |
62 | one). For long options that have a zero `flag' field, `getopt' | |
63 | returns the contents of the `val' field. */ | |
64 | ||
65 | struct option | |
66 | { | |
67 | char *name; | |
68 | int has_arg; | |
69 | int *flag; | |
70 | int val; | |
71 | }; | |
72 | ||
73 | #ifdef __STDC__ | |
74 | extern const struct option *_getopt_long_options; | |
75 | #else | |
76 | extern struct option *_getopt_long_options; | |
77 | #endif | |
78 | ||
79 | /* If nonzero, '-' can introduce long-named options. | |
80 | Set by getopt_long_only. */ | |
81 | ||
82 | extern int _getopt_long_only; | |
83 | ||
84 | /* The index in GETOPT_LONG_OPTIONS of the long-named option found. | |
85 | Only valid when a long-named option has been found by the most | |
86 | recent call to `getopt'. */ | |
87 | ||
88 | extern int option_index; | |
89 | ||
90 | #ifdef __STDC__ | |
91 | int getopt (int argc, char **argv, const char *shortopts); | |
92 | int getopt_long (int argc, char **argv, const char *shortopts, | |
93 | const struct option *longopts, int *longind); | |
94 | int getopt_long_only (int argc, char **argv, const char *shortopts, | |
95 | const struct option *longopts, int *longind); | |
96 | void envopt(int *pargc, char ***pargv, char *optstr); | |
97 | #else | |
98 | int getopt (); | |
99 | int getopt_long (); | |
100 | int getopt_long_only (); | |
101 | void envopt(); | |
102 | #endif |