| 1 |
pcg |
1.1 |
/* Declarations for getopt. |
| 2 |
|
|
Copyright (C) 1989,90,91,92,93,94,96,97 Free Software Foundation, Inc. |
| 3 |
|
|
|
| 4 |
|
|
NOTE: The canonical source of this file is maintained with the GNU C Library. |
| 5 |
|
|
Bugs can be reported to bug-glibc@prep.ai.mit.edu. |
| 6 |
|
|
|
| 7 |
|
|
This program is free software; you can redistribute it and/or modify it |
| 8 |
|
|
under the terms of the GNU General Public License as published by the |
| 9 |
|
|
Free Software Foundation; either version 2, or (at your option) any |
| 10 |
|
|
later version. |
| 11 |
|
|
|
| 12 |
|
|
This program is distributed in the hope that it will be useful, |
| 13 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 |
|
|
GNU General Public License for more details. |
| 16 |
|
|
|
| 17 |
|
|
You should have received a copy of the GNU General Public License |
| 18 |
|
|
along with this program; if not, write to the Free Software |
| 19 |
|
|
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 |
|
|
*/ |
| 21 |
|
|
|
| 22 |
|
|
#ifndef _GETOPT_H |
| 23 |
|
|
#define _GETOPT_H 1 |
| 24 |
|
|
|
| 25 |
|
|
#ifdef __cplusplus |
| 26 |
|
|
extern "C" { |
| 27 |
|
|
#endif |
| 28 |
|
|
|
| 29 |
|
|
/* For communication from `getopt' to the caller. |
| 30 |
|
|
When `getopt' finds an option that takes an argument, |
| 31 |
|
|
the argument value is returned here. |
| 32 |
|
|
Also, when `ordering' is RETURN_IN_ORDER, |
| 33 |
|
|
each non-option ARGV-element is returned here. */ |
| 34 |
|
|
|
| 35 |
|
|
extern char *optarg; |
| 36 |
|
|
|
| 37 |
|
|
/* Index in ARGV of the next element to be scanned. |
| 38 |
|
|
This is used for communication to and from the caller |
| 39 |
|
|
and for communication between successive calls to `getopt'. |
| 40 |
|
|
|
| 41 |
|
|
On entry to `getopt', zero means this is the first call; initialize. |
| 42 |
|
|
|
| 43 |
|
|
When `getopt' returns -1, this is the index of the first of the |
| 44 |
|
|
non-option elements that the caller should itself scan. |
| 45 |
|
|
|
| 46 |
|
|
Otherwise, `optind' communicates from one call to the next |
| 47 |
|
|
how much of ARGV has been scanned so far. */ |
| 48 |
|
|
|
| 49 |
|
|
extern int optind; |
| 50 |
|
|
|
| 51 |
|
|
/* Callers store zero here to inhibit the error message `getopt' prints |
| 52 |
|
|
for unrecognized options. */ |
| 53 |
|
|
|
| 54 |
|
|
extern int opterr; |
| 55 |
|
|
|
| 56 |
|
|
/* Set to an option character which was unrecognized. */ |
| 57 |
|
|
|
| 58 |
|
|
extern int optopt; |
| 59 |
|
|
|
| 60 |
|
|
/* Describe the long-named options requested by the application. |
| 61 |
|
|
The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector |
| 62 |
|
|
of `struct option' terminated by an element containing a name which is |
| 63 |
|
|
zero. |
| 64 |
|
|
|
| 65 |
|
|
The field `has_arg' is: |
| 66 |
|
|
no_argument (or 0) if the option does not take an argument, |
| 67 |
|
|
required_argument (or 1) if the option requires an argument, |
| 68 |
|
|
optional_argument (or 2) if the option takes an optional argument. |
| 69 |
|
|
|
| 70 |
|
|
If the field `flag' is not NULL, it points to a variable that is set |
| 71 |
|
|
to the value given in the field `val' when the option is found, but |
| 72 |
|
|
left unchanged if the option is not found. |
| 73 |
|
|
|
| 74 |
|
|
To have a long-named option do something other than set an `int' to |
| 75 |
|
|
a compiled-in constant, such as set a value from `optarg', set the |
| 76 |
|
|
option's `flag' field to zero and its `val' field to a nonzero |
| 77 |
|
|
value (the equivalent single-letter option character, if there is |
| 78 |
|
|
one). For long options that have a zero `flag' field, `getopt' |
| 79 |
|
|
returns the contents of the `val' field. */ |
| 80 |
|
|
|
| 81 |
|
|
struct option |
| 82 |
|
|
{ |
| 83 |
|
|
#if defined (__STDC__) && __STDC__ |
| 84 |
|
|
const char *name; |
| 85 |
|
|
#else |
| 86 |
|
|
char *name; |
| 87 |
|
|
#endif |
| 88 |
|
|
/* has_arg can't be an enum because some compilers complain about |
| 89 |
|
|
type mismatches in all the code that assumes it is an int. */ |
| 90 |
|
|
int has_arg; |
| 91 |
|
|
int *flag; |
| 92 |
|
|
int val; |
| 93 |
|
|
}; |
| 94 |
|
|
|
| 95 |
|
|
/* Names for the values of the `has_arg' field of `struct option'. */ |
| 96 |
|
|
|
| 97 |
|
|
#define no_argument 0 |
| 98 |
|
|
#define required_argument 1 |
| 99 |
|
|
#define optional_argument 2 |
| 100 |
|
|
|
| 101 |
|
|
#if defined (__STDC__) && __STDC__ |
| 102 |
|
|
#ifdef __GNU_LIBRARY__ |
| 103 |
|
|
/* Many other libraries have conflicting prototypes for getopt, with |
| 104 |
|
|
differences in the consts, in stdlib.h. To avoid compilation |
| 105 |
|
|
errors, only prototype getopt for the GNU C library. */ |
| 106 |
|
|
extern int getopt (int argc, char *const *argv, const char *shortopts); |
| 107 |
|
|
#else /* not __GNU_LIBRARY__ */ |
| 108 |
|
|
extern int getopt (); |
| 109 |
|
|
#endif /* __GNU_LIBRARY__ */ |
| 110 |
|
|
extern int getopt_long (int argc, char *const *argv, const char *shortopts, |
| 111 |
|
|
const struct option *longopts, int *longind); |
| 112 |
|
|
extern int getopt_long_only (int argc, char *const *argv, |
| 113 |
|
|
const char *shortopts, |
| 114 |
|
|
const struct option *longopts, int *longind); |
| 115 |
|
|
|
| 116 |
|
|
/* Internal only. Users should not call this directly. */ |
| 117 |
|
|
extern int _getopt_internal (int argc, char *const *argv, |
| 118 |
|
|
const char *shortopts, |
| 119 |
|
|
const struct option *longopts, int *longind, |
| 120 |
|
|
int long_only); |
| 121 |
|
|
#else /* not __STDC__ */ |
| 122 |
|
|
extern int getopt (); |
| 123 |
|
|
extern int getopt_long (); |
| 124 |
|
|
extern int getopt_long_only (); |
| 125 |
|
|
|
| 126 |
|
|
extern int _getopt_internal (); |
| 127 |
|
|
#endif /* __STDC__ */ |
| 128 |
|
|
|
| 129 |
|
|
#ifdef __cplusplus |
| 130 |
|
|
} |
| 131 |
|
|
#endif |
| 132 |
|
|
|
| 133 |
|
|
#endif /* _GETOPT_H */ |
