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+/* Getopt for GNU.
+ NOTE: gnu_getopt is now part of the C library, so if you don't know what
+ "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu
+ before changing it!
+
+ Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 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.
+ * add #include <string.h> here for strncmp(). Originally
+ * it was included only under special conditions.
+ *
+ * $Id: gnu_getopt.c,v 1.1.1.1 2004/05/18 01:50:44 kgibbs Exp $
+ */
+
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#ifndef _MSC_VER /* Visual C++ doesn't have unistd.h */
+ #include <unistd.h>
+#endif
+#include <string.h>
+
+#ifndef _
+/* This is for other GNU distributions with internationalized messages.
+ When compiling libc, the _ macro is predefined. */
+ #ifdef HAVE_LIBINTL_H
+ #include <libintl.h>
+ #define _(msgid) gettext (msgid)
+ #else
+ #define _(msgid) (msgid)
+ #endif
+#endif
+
+/* This version of `gnu_getopt' appears to the caller like standard
+ Unix `getopt' but it behaves differently for the user, since it
+ allows the user to intersperse the options with the other
+ arguments.
+
+ As `gnu_getopt' works, it permutes the elements of ARGV so that,
+ when it is done, all the options precede everything else. Thus
+ all application programs are extended to handle flexible argument order.
+
+ Setting the environment variable POSIXLY_CORRECT disables permutation.
+ Then the behavior is completely standard.
+
+ GNU application programs can use a third alternative mode in which
+ they can distinguish the relative order of options and other arguments. */
+
+#include "gnu_getopt.h"
+
+#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. */
+
+char *gnu_optarg = NULL;
+
+/* 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. */
+
+/* 1003.2 says this must be 1 before any call. */
+int gnu_optind = 1;
+
+/* Formerly, initialization of gnu_getopt depended on gnu_optind==0, which
+ causes problems with re-calling gnu_getopt as programs generally don't
+ know that. */
+
+int __gnu_getopt_initialized = 0;
+
+/* The next char to be scanned in the option-element
+ in which the last option character we returned was found.
+ This allows us to pick up the scan where we left off.
+
+ If this is zero, or a null string, it means resume the scan
+ by advancing to the next ARGV-element. */
+
+static char *nextchar;
+
+/* Callers store zero here to inhibit the error message
+ for unrecognized options. */
+
+int gnu_opterr = 1;
+
+/* Set to an option character which was unrecognized.
+ This must be initialized on some systems to avoid linking in the
+ system's own gnu_getopt implementation. */
+
+int gnu_optopt = '?';
+
+/* Describe how to deal with options that follow non-option ARGV-elements.
+
+ If the caller did not specify anything,
+ the default is REQUIRE_ORDER if the environment variable
+ POSIXLY_CORRECT is defined, PERMUTE otherwise.
+
+ REQUIRE_ORDER means don't recognize them as options;
+ stop option processing when the first non-option is seen.
+ This is what Unix does.
+ This mode of operation is selected by either setting the environment
+ variable POSIXLY_CORRECT, or using `+' as the first character
+ of the list of option characters.
+
+ PERMUTE is the default. We permute the contents of ARGV as we scan,
+ so that eventually all the non-options are at the end. This allows options
+ to be given in any order, even with programs that were not written to
+ expect this.
+
+ RETURN_IN_ORDER is an option available to programs that were written
+ to expect options and other ARGV-elements in any order and that care about
+ the ordering of the two. We describe each non-option ARGV-element
+ as if it were the argument of an option with character code 1.
+ Using `-' as the first character of the list of option characters
+ selects this mode of operation.
+
+ The special argument `--' forces an end of option-scanning regardless
+ of the value of `ordering'. In the case of RETURN_IN_ORDER, only
+ `--' can cause `gnu_getopt' to return -1 with `gnu_optind' != ARGC. */
+
+static enum {
+ REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
+} ordering;
+
+/* Value of POSIXLY_CORRECT environment variable. */
+static char *posixly_correct;
+
+
+/* Avoid depending on library functions or files
+ whose names are inconsistent. */
+
+static char *
+my_index( const char* str, int chr ) {
+ while ( *str ) {
+ if ( *str == chr )
+ return(char *) str;
+ str++;
+ }
+ return 0;
+}
+
+
+/* Handle permutation of arguments. */
+
+/* Describe the part of ARGV that contains non-options that have
+ been skipped. `first_nonopt' is the index in ARGV of the first of them;
+ `last_nonopt' is the index after the last of them. */
+
+static int first_nonopt;
+static int last_nonopt;
+
+/* Exchange two adjacent subsequences of ARGV.
+ One subsequence is elements [first_nonopt,last_nonopt)
+ which contains all the non-options that have been skipped so far.
+ The other is elements [last_nonopt,gnu_optind), which contains all
+ the options processed since those non-options were skipped.
+
+ `first_nonopt' and `last_nonopt' are relocated so that they describe
+ the new indices of the non-options in ARGV after they are moved. */
+
+static void exchange( char **argv );
+
+static void
+exchange( char **argv ) {
+ int bottom = first_nonopt;
+ int middle = last_nonopt;
+ int top = gnu_optind;
+ char *tem;
+
+ /* Exchange the shorter segment with the far end of the longer segment.
+ That puts the shorter segment into the right place.
+ It leaves the longer segment in the right place overall,
+ but it consists of two parts that need to be swapped next. */
+
+ while ( top > middle && middle > bottom ) {
+ if ( top - middle > middle - bottom ) {
+ /* Bottom segment is the short one. */
+ int len = middle - bottom;
+ register int i;
+
+ /* Swap it with the top part of the top segment. */
+ for ( i = 0; i < len; i++ ) {
+ tem = argv[bottom + i];
+ argv[bottom + i] = argv[top - (middle - bottom) + i];
+ argv[top - (middle - bottom) + i] = tem;
+ }
+ /* Exclude the moved bottom segment from further swapping. */
+ top -= len;
+ } else {
+ /* Top segment is the short one. */
+ int len = top - middle;
+ register int i;
+
+ /* Swap it with the bottom part of the bottom segment. */
+ for ( i = 0; i < len; i++ ) {
+ tem = argv[bottom + i];
+ argv[bottom + i] = argv[middle + i];
+ argv[middle + i] = tem;
+ }
+ /* Exclude the moved top segment from further swapping. */
+ bottom += len;
+ }
+ }
+
+ /* Update records for the slots the non-options now occupy. */
+
+ first_nonopt += (gnu_optind - last_nonopt);
+ last_nonopt = gnu_optind;
+}
+
+/* Initialize the internal data when the first call is made. */
+
+static const char *
+_gnu_getopt_initialize( int argc,
+ char *const * argv,
+ const char *optstring );
+
+static const char *
+_gnu_getopt_initialize( int argc,
+ char *const * argv,
+ const char *optstring ) {
+ /* Start processing options with ARGV-element 1 (since ARGV-element 0
+ is the program name); the sequence of previously skipped
+ non-option ARGV-elements is empty. */
+
+ first_nonopt = last_nonopt = gnu_optind = 1;
+
+ nextchar = NULL;
+
+ posixly_correct = getenv ("POSIXLY_CORRECT");
+
+ /* Determine how to handle the ordering of options and nonoptions. */
+
+ if ( optstring[0] == '-' ) {
+ ordering = RETURN_IN_ORDER;
+ ++optstring;
+ } else if ( optstring[0] == '+' ) {
+ ordering = REQUIRE_ORDER;
+ ++optstring;
+ } else if ( posixly_correct != NULL )
+ ordering = REQUIRE_ORDER;
+ else
+ ordering = PERMUTE;
+
+ return optstring;
+}
+
+/* Scan elements of ARGV (whose length is ARGC) for option characters
+ given in OPTSTRING.
+
+ If an element of ARGV starts with '-', and is not exactly "-" or "--",
+ then it is an option element. The characters of this element
+ (aside from the initial '-') are option characters. If `gnu_getopt'
+ is called repeatedly, it returns successively each of the option characters
+ from each of the option elements.
+
+ If `gnu_getopt' finds another option character, it returns that character,
+ updating `gnu_optind' and `nextchar' so that the next call to `gnu_getopt' can
+ resume the scan with the following option character or ARGV-element.
+
+ If there are no more option characters, `gnu_getopt' returns -1.
+ Then `gnu_optind' is the index in ARGV of the first ARGV-element
+ that is not an option. (The ARGV-elements have been permuted
+ so that those that are not options now come last.)
+
+ OPTSTRING is a string containing the legitimate option characters.
+ If an option character is seen that is not listed in OPTSTRING,
+ return '?' after printing an error message. If you set `gnu_opterr' to
+ zero, the error message is suppressed but we still return '?'.
+
+ If a char in OPTSTRING is followed by a colon, that means it wants an arg,
+ so the following text in the same ARGV-element, or the text of the following
+ ARGV-element, is returned in `gnu_optarg'. Two colons mean an option that
+ wants an optional arg; if there is text in the current ARGV-element,
+ it is returned in `gnu_optarg', otherwise `gnu_optarg' is set to zero.
+
+ If OPTSTRING starts with `-' or `+', it requests different methods of
+ handling the non-option ARGV-elements.
+ See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
+
+ Long-named options begin with `--' instead of `-'.
+ Their names may be abbreviated as long as the abbreviation is unique
+ or is an exact match for some defined option. If they have an
+ argument, it follows the option name in the same ARGV-element, separated
+ from the option name by a `=', or else the in next ARGV-element.
+ When `gnu_getopt' finds a long-named option, it returns 0 if that option's
+ `flag' field is nonzero, the value of the option's `val' field
+ if the `flag' field is zero.
+
+ The elements of ARGV aren't really const, because we permute them.
+ But we pretend they're const in the prototype to be compatible
+ with other systems.
+
+ LONGOPTS is a vector of `struct option' terminated by an
+ element containing a name which is zero.
+
+ LONGIND returns the index in LONGOPT of the long-named option found.
+ It is only valid when a long-named option has been found by the most
+ recent call.
+
+ If LONG_ONLY is nonzero, '-' as well as '--' can introduce
+ long-named options. */
+
+int
+_gnu_getopt_internal( int argc,
+ char *const *argv,
+ const char *optstring,
+ const struct option *longopts,
+ int *longind,
+ int long_only ) {
+ gnu_optarg = NULL;
+
+ if ( !__gnu_getopt_initialized || gnu_optind == 0 ) {
+ optstring = _gnu_getopt_initialize (argc, argv, optstring);
+ gnu_optind = 1; /* Don't scan ARGV[0], the program name. */
+ __gnu_getopt_initialized = 1;
+ }
+
+ /* Test whether ARGV[gnu_optind] points to a non-option argument.
+ Either it does not have option syntax, or there is an environment flag
+ from the shell indicating it is not an option. The later information
+ is only used when the used in the GNU libc. */
+
+#define NONOPTION_P (argv[gnu_optind][0] != '-' || argv[gnu_optind][1] == '\0')
+
+ if ( nextchar == NULL || *nextchar == '\0' ) {
+ /* Advance to the next ARGV-element. */
+
+ /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
+ moved back by the user (who may also have changed the arguments). */
+ if ( last_nonopt > gnu_optind )
+ last_nonopt = gnu_optind;
+ if ( first_nonopt > gnu_optind )
+ first_nonopt = gnu_optind;
+
+ if ( ordering == PERMUTE ) {
+ /* If we have just processed some options following some non-options,
+ exchange them so that the options come first. */
+
+ if ( first_nonopt != last_nonopt && last_nonopt != gnu_optind )
+ exchange ((char **) argv);
+ else if ( last_nonopt != gnu_optind )
+ first_nonopt = gnu_optind;
+
+ /* Skip any additional non-options
+ and extend the range of non-options previously skipped. */
+
+ while ( gnu_optind < argc && NONOPTION_P )
+ gnu_optind++;
+ last_nonopt = gnu_optind;
+ }
+
+ /* The special ARGV-element `--' means premature end of options.
+ Skip it like a null option,
+ then exchange with previous non-options as if it were an option,
+ then skip everything else like a non-option. */
+
+ if ( gnu_optind != argc && !strcmp (argv[gnu_optind], "--") ) {
+ gnu_optind++;
+
+ if ( first_nonopt != last_nonopt && last_nonopt != gnu_optind )
+ exchange ((char **) argv);
+ else if ( first_nonopt == last_nonopt )
+ first_nonopt = gnu_optind;
+ last_nonopt = argc;
+
+ gnu_optind = argc;
+ }
+
+ /* If we have done all the ARGV-elements, stop the scan
+ and back over any non-options that we skipped and permuted. */
+
+ if ( gnu_optind == argc ) {
+ /* Set the next-arg-index to point at the non-options
+ that we previously skipped, so the caller will digest them. */
+ if ( first_nonopt != last_nonopt )
+ gnu_optind = first_nonopt;
+ return -1;
+ }
+
+ /* If we have come to a non-option and did not permute it,
+ either stop the scan or describe it to the caller and pass it by. */
+
+ if ( NONOPTION_P ) {
+ if ( ordering == REQUIRE_ORDER )
+ return -1;
+ gnu_optarg = argv[gnu_optind++];
+ return 1;
+ }
+
+ /* We have found another option-ARGV-element.
+ Skip the initial punctuation. */
+
+ nextchar = (argv[gnu_optind] + 1
+ + (longopts != NULL && argv[gnu_optind][1] == '-'));
+ }
+
+ /* Decode the current option-ARGV-element. */
+
+ /* Check whether the ARGV-element is a long option.
+
+ If long_only and the ARGV-element has the form "-f", where f is
+ a valid short option, don't consider it an abbreviated form of
+ a long option that starts with f. Otherwise there would be no
+ way to give the -f short option.
+
+ On the other hand, if there's a long option "fubar" and
+ the ARGV-element is "-fu", do consider that an abbreviation of
+ the long option, just like "--fu", and not "-f" with arg "u".
+
+ This distinction seems to be the most useful approach. */
+
+ if ( longopts != NULL
+ && (argv[gnu_optind][1] == '-'
+ || (long_only && (argv[gnu_optind][2] || !my_index (optstring, argv[gnu_optind][1])))) ) {
+ char *nameend;
+ const struct option *p;
+ const struct option *pfound = NULL;
+ int exact = 0;
+ int ambig = 0;
+ int indfound = -1;
+ int option_index;
+
+ for ( nameend = nextchar; *nameend && *nameend != '='; nameend++ )
+ /* Do nothing. */ ;
+
+ /* Test all long options for either exact match
+ or abbreviated matches. */
+ for ( p = longopts, option_index = 0; p->name; p++, option_index++ )
+ if ( !strncmp (p->name, nextchar, nameend - nextchar) ) {
+ if ( (unsigned int) (nameend - nextchar)
+ == (unsigned int) strlen (p->name) ) {
+ /* Exact match found. */
+ pfound = p;
+ indfound = option_index;
+ exact = 1;
+ break;
+ } else if ( pfound == NULL ) {
+ /* First nonexact match found. */
+ pfound = p;
+ indfound = option_index;
+ } else
+ /* Second or later nonexact match found. */
+ ambig = 1;
+ }
+
+ if ( ambig && !exact ) {
+ if ( gnu_opterr )
+ fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
+ argv[0], argv[gnu_optind]);
+ nextchar += strlen (nextchar);
+ gnu_optind++;
+ gnu_optopt = 0;
+ return '?';
+ }
+
+ if ( pfound != NULL ) {
+ option_index = indfound;
+ gnu_optind++;
+ if ( *nameend ) {
+ /* Don't test has_arg with >, because some C compilers don't
+ allow it to be used on enums. */
+ if ( pfound->has_arg )
+ gnu_optarg = nameend + 1;
+ else {
+ if ( gnu_opterr ) {
+ if ( argv[gnu_optind - 1][1] == '-' ) {
+ /* --option */
+ fprintf (stderr,
+ _("%s: option `--%s' doesn't allow an argument\n"),
+ argv[0], pfound->name);
+ } else {
+ /* +option or -option */
+ fprintf (stderr,
+ _("%s: option `%c%s' doesn't allow an argument\n"),
+ argv[0], argv[gnu_optind - 1][0], pfound->name);
+ }
+ }
+
+ nextchar += strlen (nextchar);
+
+ gnu_optopt = pfound->val;
+ return '?';
+ }
+ } else if ( pfound->has_arg == 1 ) {
+ if ( gnu_optind < argc )
+ gnu_optarg = argv[gnu_optind++];
+ else {
+ if ( gnu_opterr )
+ fprintf (stderr,
+ _("%s: option `%s' requires an argument\n"),
+ argv[0], argv[gnu_optind - 1]);
+ nextchar += strlen (nextchar);
+ gnu_optopt = pfound->val;
+ return optstring[0] == ':' ? ':' : '?';
+ }
+ }
+ nextchar += strlen (nextchar);
+ if ( longind != NULL )
+ *longind = option_index;
+ if ( pfound->flag ) {
+ *(pfound->flag) = pfound->val;
+ return 0;
+ }
+ return pfound->val;
+ }
+
+ /* Can't find it as a long option. If this is not gnu_getopt_long_only,
+ or the option starts with '--' or is not a valid short
+ option, then it's an error.
+ Otherwise interpret it as a short option. */
+ if ( !long_only || argv[gnu_optind][1] == '-'
+ || my_index (optstring, *nextchar) == NULL ) {
+ if ( gnu_opterr ) {
+ if ( argv[gnu_optind][1] == '-' )
+ /* --option */
+ fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
+ argv[0], nextchar);
+ else
+ /* +option or -option */
+ fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
+ argv[0], argv[gnu_optind][0], nextchar);
+ }
+ nextchar = (char *) "";
+ gnu_optind++;
+ gnu_optopt = 0;
+ return '?';
+ }
+ }
+
+ /* Look at and handle the next short option-character. */
+
+ {
+ char c = *nextchar++;
+ char *temp = my_index (optstring, c);
+
+ /* Increment `gnu_optind' when we start to process its last character. */
+ if ( *nextchar == '\0' )
+ ++gnu_optind;
+
+ if ( temp == NULL || c == ':' ) {
+ if ( gnu_opterr ) {
+ if ( posixly_correct )
+ /* 1003.2 specifies the format of this message. */
+ fprintf (stderr, _("%s: illegal option -- %c\n"),
+ argv[0], c);
+ else
+ fprintf (stderr, _("%s: invalid option -- %c\n"),
+ argv[0], c);
+ }
+ gnu_optopt = c;
+ return '?';
+ }
+ /* Convenience. Treat POSIX -W foo same as long option --foo */
+ if ( temp[0] == 'W' && temp[1] == ';' ) {
+ char *nameend;
+ const struct option *p;
+ const struct option *pfound = NULL;
+ int exact = 0;
+ int ambig = 0;
+ int indfound = 0;
+ int option_index;
+
+ /* This is an option that requires an argument. */
+ if ( *nextchar != '\0' ) {
+ gnu_optarg = nextchar;
+ /* If we end this ARGV-element by taking the rest as an arg,
+ we must advance to the next element now. */
+ gnu_optind++;
+ } else if ( gnu_optind == argc ) {
+ if ( gnu_opterr ) {
+ /* 1003.2 specifies the format of this message. */
+ fprintf (stderr, _("%s: option requires an argument -- %c\n"),
+ argv[0], c);
+ }
+ gnu_optopt = c;
+ if ( optstring[0] == ':' )
+ c = ':';
+ else
+ c = '?';
+ return c;
+ } else
+ /* We already incremented `gnu_optind' once;
+ increment it again when taking next ARGV-elt as argument. */
+ gnu_optarg = argv[gnu_optind++];
+
+ /* gnu_optarg is now the argument, see if it's in the
+ table of longopts. */
+
+ for ( nextchar = nameend = gnu_optarg; *nameend && *nameend != '='; nameend++ )
+ /* Do nothing. */ ;
+
+ /* Test all long options for either exact match
+ or abbreviated matches. */
+ for ( p = longopts, option_index = 0; p->name; p++, option_index++ )
+ if ( !strncmp (p->name, nextchar, nameend - nextchar) ) {
+ if ( (unsigned int) (nameend - nextchar) == strlen (p->name) ) {
+ /* Exact match found. */
+ pfound = p;
+ indfound = option_index;
+ exact = 1;
+ break;
+ } else if ( pfound == NULL ) {
+ /* First nonexact match found. */
+ pfound = p;
+ indfound = option_index;
+ } else
+ /* Second or later nonexact match found. */
+ ambig = 1;
+ }
+ if ( ambig && !exact ) {
+ if ( gnu_opterr )
+ fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
+ argv[0], argv[gnu_optind]);
+ nextchar += strlen (nextchar);
+ gnu_optind++;
+ return '?';
+ }
+ if ( pfound != NULL ) {
+ option_index = indfound;
+ if ( *nameend ) {
+ /* Don't test has_arg with >, because some C compilers don't
+ allow it to be used on enums. */
+ if ( pfound->has_arg )
+ gnu_optarg = nameend + 1;
+ else {
+ if ( gnu_opterr )
+ fprintf (stderr, _("\
+%s: option `-W %s' doesn't allow an argument\n"),
+ argv[0], pfound->name);
+
+ nextchar += strlen (nextchar);
+ return '?';
+ }
+ } else if ( pfound->has_arg == 1 ) {
+ if ( gnu_optind < argc )
+ gnu_optarg = argv[gnu_optind++];
+ else {
+ if ( gnu_opterr )
+ fprintf (stderr,
+ _("%s: option `%s' requires an argument\n"),
+ argv[0], argv[gnu_optind - 1]);
+ nextchar += strlen (nextchar);
+ return optstring[0] == ':' ? ':' : '?';
+ }
+ }
+ nextchar += strlen (nextchar);
+ if ( longind != NULL )
+ *longind = option_index;
+ if ( pfound->flag ) {
+ *(pfound->flag) = pfound->val;
+ return 0;
+ }
+ return pfound->val;
+ }
+ nextchar = NULL;
+ return 'W'; /* Let the application handle it. */
+ }
+ if ( temp[1] == ':' ) {
+ if ( temp[2] == ':' ) {
+ /* This is an option that accepts an argument optionally. */
+ if ( *nextchar != '\0' ) {
+ gnu_optarg = nextchar;
+ gnu_optind++;
+ } else
+ gnu_optarg = NULL;
+ nextchar = NULL;
+ } else {
+ /* This is an option that requires an argument. */
+ if ( *nextchar != '\0' ) {
+ gnu_optarg = nextchar;
+ /* If we end this ARGV-element by taking the rest as an arg,
+ we must advance to the next element now. */
+ gnu_optind++;
+ } else if ( gnu_optind == argc ) {
+ if ( gnu_opterr ) {
+ /* 1003.2 specifies the format of this message. */
+ fprintf (stderr,
+ _("%s: option requires an argument -- %c\n"),
+ argv[0], c);
+ }
+ gnu_optopt = c;
+ if ( optstring[0] == ':' )
+ c = ':';
+ else
+ c = '?';
+ } else
+ /* We already incremented `gnu_optind' once;
+ increment it again when taking next ARGV-elt as argument. */
+ gnu_optarg = argv[gnu_optind++];
+ nextchar = NULL;
+ }
+ }
+ return c;
+ }
+}
+
+int
+gnu_getopt ( int argc,
+ char *const *argv,
+ const char *optstring ) {
+ return _gnu_getopt_internal (argc, argv, optstring,
+ (const struct option *) 0,
+ (int *) 0,
+ 0);
+}
+
+#ifdef __cplusplus
+} /* end extern "C" */
+#endif
+
+
+#ifdef TEST
+
+/* Compile with -DTEST to make an executable for use in testing
+ the above definition of `gnu_getopt'. */
+
+int
+main (argc, argv)
+int argc;
+char **argv;
+{
+int c;
+int digit_optind = 0;
+
+while ( 1 ) {
+ int this_option_optind = gnu_optind ? gnu_optind : 1;
+
+ c = gnu_getopt (argc, argv, "abc:d:0123456789");
+ if ( c == -1 )
+ break;
+
+ switch ( c ) {
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ if ( digit_optind != 0 && digit_optind != this_option_optind )
+ fprintf ( stderr, "digits occur in two different argv-elements.\n");
+ digit_optind = this_option_optind;
+ fprintf ( stderr, "option %c\n", c);
+ break;
+
+ case 'a':
+ fprintf ( stderr, "option a\n");
+ break;
+
+ case 'b':
+ fprintf ( stderr, "option b\n");
+ break;
+
+ case 'c':
+ fprintf ( stderr, "option c with value `%s'\n", gnu_optarg);
+ break;
+
+ case '?':
+ break;
+
+ default:
+ fprintf ( stderr, "?? gnu_getopt returned character code 0%o ??\n", c);
+ }
+}
+
+if ( gnu_optind < argc ) {
+ fprintf (stderr, "non-option ARGV-elements: ");
+ while ( gnu_optind < argc )
+ fprintf ( stderr, "%s ", argv[gnu_optind++]);
+ fprintf ( stderr, "\n");
+}
+
+exit (0);
+}
+
+#endif /* TEST */