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