[18019] | 1 | /* Declarations for getopt.
|
---|
| 2 | Copyright (C) 1989, 1990, 1991, 1992, 1993 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 __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 __STDC__
|
---|
| 98 | #if defined(__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 /* not __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 /* not __STDC__ */
|
---|
| 124 |
|
---|
| 125 | #ifdef __cplusplus
|
---|
| 126 | }
|
---|
| 127 | #endif
|
---|
| 128 |
|
---|
| 129 | #endif /* _GETOPT_H */
|
---|