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| Commit | Line | Data |
|---|---|---|
| 10376189 C |
1 | /* Declarations for getopt. |
| 2 | Copyright (C) 1989, 1990, 1991, 1992 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 Library General Public License as published | |
| 6 | by the Free Software Foundation; either version 2, 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 Library General Public | |
| 15 | License along with this program; if not, write to the Free Software | |
| 16 | Foundation, Inc., 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 | /* Describe the long-named options requested by the application. | |
| 53 | The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector | |
| 54 | of `struct option' terminated by an element containing a name which is | |
| 55 | zero. | |
| 56 | ||
| 57 | The field `has_arg' is: | |
| 58 | no_argument (or 0) if the option does not take an argument, | |
| 59 | required_argument (or 1) if the option requires an argument, | |
| 60 | optional_argument (or 2) if the option takes an optional argument. | |
| 61 | ||
| 62 | If the field `flag' is not NULL, it points to a variable that is set | |
| 63 | to the value given in the field `val' when the option is found, but | |
| 64 | left unchanged if the option is not found. | |
| 65 | ||
| 66 | To have a long-named option do something other than set an `int' to | |
| 67 | a compiled-in constant, such as set a value from `optarg', set the | |
| 68 | option's `flag' field to zero and its `val' field to a nonzero | |
| 69 | value (the equivalent single-letter option character, if there is | |
| 70 | one). For long options that have a zero `flag' field, `getopt' | |
| 71 | returns the contents of the `val' field. */ | |
| 72 | ||
| 73 | struct option | |
| 74 | { | |
| 75 | #if __STDC__ | |
| 76 | const char *name; | |
| 77 | #else | |
| 78 | char *name; | |
| 79 | #endif | |
| 80 | /* has_arg can't be an enum because some compilers complain about | |
| 81 | type mismatches in all the code that assumes it is an int. */ | |
| 82 | int has_arg; | |
| 83 | int *flag; | |
| 84 | int val; | |
| 85 | }; | |
| 86 | ||
| 87 | /* Names for the values of the `has_arg' field of `struct option'. */ | |
| 88 | ||
| 89 | enum _argtype | |
| 90 | { | |
| 91 | no_argument, | |
| 92 | required_argument, | |
| 93 | optional_argument | |
| 94 | }; | |
| 95 | ||
| 96 | #if __STDC__ | |
| 97 | #if defined(__GNU_LIBRARY__) | |
| 98 | /* Many other libraries have conflicting prototypes for getopt, with | |
| 99 | differences in the consts, in stdlib.h. To avoid compilation | |
| 100 | errors, only prototype getopt for the GNU C library. */ | |
| 101 | extern int getopt (int argc, char *const *argv, const char *shortopts); | |
| 102 | #else /* not __GNU_LIBRARY__ */ | |
| 103 | extern int getopt (); | |
| 104 | #endif /* not __GNU_LIBRARY__ */ | |
| 105 | extern int getopt_long (int argc, char *const *argv, const char *shortopts, | |
| 106 | const struct option *longopts, int *longind); | |
| 107 | extern int getopt_long_only (int argc, char *const *argv, | |
| 108 | const char *shortopts, | |
| 109 | const struct option *longopts, int *longind); | |
| 110 | ||
| 111 | /* Internal only. Users should not call this directly. */ | |
| 112 | extern int _getopt_internal (int argc, char *const *argv, | |
| 113 | const char *shortopts, | |
| 114 | const struct option *longopts, int *longind, | |
| 115 | int long_only); | |
| 116 | #else /* not __STDC__ */ | |
| 117 | extern int getopt (); | |
| 118 | extern int getopt_long (); | |
| 119 | extern int getopt_long_only (); | |
| 120 | ||
| 121 | extern int _getopt_internal (); | |
| 122 | #endif /* not __STDC__ */ | |
| 123 | ||
| 124 | #ifdef __cplusplus | |
| 125 | } | |
| 126 | #endif | |
| 127 | ||
| 128 | #endif /* _GETOPT_H */ |