103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
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/* declarations for getopt
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Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* @(#)getopt.h 1.6 92/03/31 */
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/* For communication from `getopt' to the caller.
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When `getopt' finds an option that takes an argument,
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the argument value is returned here.
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Also, when `ordering' is RETURN_IN_ORDER,
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each non-option ARGV-element is returned here. */
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extern char *optarg;
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/* Index in ARGV of the next element to be scanned.
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This is used for communication to and from the caller
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and for communication between successive calls to `getopt'.
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On entry to `getopt', zero means this is the first call; initialize.
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When `getopt' returns EOF, this is the index of the first of the
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non-option elements that the caller should itself scan.
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Otherwise, `optind' communicates from one call to the next
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how much of ARGV has been scanned so far. */
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extern int optind;
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/* Callers store zero here to inhibit the error message `getopt' prints
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for unrecognized options. */
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extern int opterr;
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/* Describe the long-named options requested by the application.
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_GETOPT_LONG_OPTIONS is a vector of `struct option' terminated by an
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element containing a name which is zero.
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The field `has_arg' is:
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0 if the option does not take an argument,
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1 if the option requires an argument,
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2 if the option takes an optional argument.
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If the field `flag' is nonzero, it points to a variable that is set
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to the value given in the field `val' when the option is found, but
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left unchanged if the option is not found.
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To have a long-named option do something other than set an `int' to
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a compiled-in constant, such as set a value from `optarg', set the
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option's `flag' field to zero and its `val' field to a nonzero
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value (the equivalent single-letter option character, if there is
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one). For long options that have a zero `flag' field, `getopt'
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returns the contents of the `val' field. */
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struct option
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{
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char *name;
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int has_arg;
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int *flag;
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int val;
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};
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#if __STDC__
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extern const struct option *_getopt_long_options;
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#else
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extern struct option *_getopt_long_options;
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#endif
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/* If nonzero, '-' can introduce long-named options.
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Set by getopt_long_only. */
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extern int _getopt_long_only;
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/* The index in GETOPT_LONG_OPTIONS of the long-named option found.
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Only valid when a long-named option has been found by the most
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recent call to `getopt'. */
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extern int option_index;
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#if __STDC__
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int gnu_getopt (int argc, char **argv, const char *shortopts);
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int gnu_getopt_long (int argc, char **argv, const char *shortopts,
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const struct option *longopts, int *longind);
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int gnu_getopt_long_only (int argc, char **argv, const char *shortopts,
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const struct option *longopts, int *longind);
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#else
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int gnu_getopt ();
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int gnu_getopt_long ();
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int gnu_getopt_long_only ();
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#endif
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