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Diffstat (limited to 'include/gnu_getopt.h')
| -rw-r--r-- | include/gnu_getopt.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/include/gnu_getopt.h b/include/gnu_getopt.h new file mode 100644 index 0000000..de8ba9f --- /dev/null +++ b/include/gnu_getopt.h @@ -0,0 +1,136 @@ +/* Declarations for gnu_getopt. + Copyright (C) 1989,90,91,92,93,94,96,97 Free Software Foundation, Inc. + + This file is part of the GNU C Library. Its master source is NOT part of + the C library, however. The master source lives in /gd/gnu/lib. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* + * modified July 9, 1999 by mark gates <mgates@nlanr.net> + * Dec 17, 1999 + * + * renamed all functions and variables by prepending "gnu_" + * removed/redid a bunch of stuff under the assumption we're + * using a modern standard C compiler. + * + * $Id: gnu_getopt.h,v 1.1.1.1 2004/05/18 01:50:44 kgibbs Exp $ + */ + +#ifndef _GETOPT_H + #define _GETOPT_H 1 + + #ifdef __cplusplus +extern "C" { +#endif + +/* For communication from `gnu_getopt' to the caller. + When `gnu_getopt' finds an option that takes an argument, + the argument value is returned here. + Also, when `ordering' is RETURN_IN_ORDER, + each non-option ARGV-element is returned here. */ + +extern char *gnu_optarg; + +/* Index in ARGV of the next element to be scanned. + This is used for communication to and from the caller + and for communication between successive calls to `gnu_getopt'. + + On entry to `gnu_getopt', zero means this is the first call; initialize. + + When `gnu_getopt' returns -1, this is the index of the first of the + non-option elements that the caller should itself scan. + + Otherwise, `gnu_optind' communicates from one call to the next + how much of ARGV has been scanned so far. */ + +extern int gnu_optind; + +/* Callers store zero here to inhibit the error message `gnu_getopt' prints + for unrecognized options. */ + +extern int gnu_opterr; + +/* Set to an option character which was unrecognized. */ + +extern int gnu_optopt; + +/* Describe the long-named options requested by the application. + The LONG_OPTIONS argument to gnu_getopt_long or getopt_long_only is a vector + of `struct option' terminated by an element containing a name which is + zero. + + The field `has_arg' is: + no_argument (or 0) if the option does not take an argument, + required_argument (or 1) if the option requires an argument, + optional_argument (or 2) if the option takes an optional argument. + + If the field `flag' is not NULL, it points to a variable that is set + to the value given in the field `val' when the option is found, but + left unchanged if the option is not found. + + To have a long-named option do something other than set an `int' to + a compiled-in constant, such as set a value from `gnu_optarg', set the + option's `flag' field to zero and its `val' field to a nonzero + value (the equivalent single-letter option character, if there is + one). For long options that have a zero `flag' field, `gnu_getopt' + returns the contents of the `val' field. */ + +/* has_arg can't be an enum because some compilers complain about + type mismatches in all the code that assumes it is an int. */ + +struct option { + const char *name; + int has_arg; + int *flag; + int val; +}; + +/* Names for the values of the `has_arg' field of `struct option'. */ + +#define no_argument 0 +#define required_argument 1 +#define optional_argument 2 + +int gnu_getopt( int argc, + char *const *argv, + const char *optstring ); + +int gnu_getopt_long( int argc, + char *const *argv, + const char *options, + const struct option *long_options, + int *opt_index ); + +int gnu_getopt_long_only( int argc, + char *const *argv, + const char *options, + const struct option *long_options, + int *opt_index ); + +/* Internal only. Users should not call this directly. */ +int _gnu_getopt_internal( int argc, + char *const *argv, + const char *optstring, + const struct option *longopts, + int *longind, + int long_only ); + +#ifdef __cplusplus +} /* end extern "C" */ + #endif + +#endif /* _GETOPT_H */ |