+/*
+ * wgetopt.c: Wide-character versions of getopt, getopt_long, and
+ * getopt_long_only.
+ *
+ * This has been modified from the original, which is
+ * Copyright (C) 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
+ * 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+ * 2010 Free Software Foundation, Inc.
+ *
+ * This file is part of wimlib, a library for working with WIM files.
+ *
+ * wimlib is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * wimlib 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 General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with wimlib; if not, see http://www.gnu.org/licenses/.
+ */
+
+#include "wgetopt.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+/* For communication from `getopt' to the caller.
+ When `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. */
+
+wchar_t *woptarg = 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 `getopt'.
+
+ On entry to `getopt', zero means this is the first call; initialize.
+
+ When `getopt' returns -1, this is the index of the first of the
+ non-option elements that the caller should itself scan.
+
+ Otherwise, `woptind' 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 woptind = 1;
+
+/* Formerly, initialization of getopt depended on woptind==0, which
+ causes problems with re-calling getopt as programs generally don't
+ know that. */
+
+int __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 wchar_t *nextchar;
+
+/* Callers store zero here to inhibit the error message
+ for unrecognized options. */
+
+int wopterr = 1;
+
+/* Set to an option character which was unrecognized.
+ This must be initialized on some systems to avoid linking in the
+ system's own getopt implementation. */
+
+int woptopt = '?';
+
+/* 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 `getopt' to return -1 with `woptind' != ARGC. */
+
+static enum
+{
+ REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
+} ordering;
+
+/* Value of POSIXLY_CORRECT environment variable. */
+static char *posixly_correct;
+
+
+/* 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,woptind), 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 (wchar_t **argv)
+{
+ int bottom = first_nonopt;
+ int middle = last_nonopt;
+ int top = woptind;
+ wchar_t *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 += (woptind - last_nonopt);
+ last_nonopt = woptind;
+}
+
+/* Initialize the internal data when the first call is made. */
+
+static const wchar_t *
+_getopt_initialize (int argc, wchar_t *const *argv, const wchar_t *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 = woptind;
+
+ nextchar = NULL;
+
+ posixly_correct = getenv ("POSIXLY_CORRECT");
+
+ /* Determine how to handle the ordering of options and nonoptions. */
+
+ if (optstring[0] == L'-')
+ {
+ ordering = RETURN_IN_ORDER;
+ ++optstring;
+ }
+ else if (optstring[0] == L'+')
+ {
+ ordering = REQUIRE_ORDER;
+ ++optstring;
+ }
+ else if (posixly_correct != NULL)
+ ordering = REQUIRE_ORDER;
+ else
+ ordering = PERMUTE;
+
+ return optstring;
+}
+\f
+/* 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 `getopt'
+ is called repeatedly, it returns successively each of the option characters
+ from each of the option elements.
+
+ If `getopt' finds another option character, it returns that character,
+ updating `woptind' and `nextchar' so that the next call to `getopt' can
+ resume the scan with the following option character or ARGV-element.
+
+ If there are no more option characters, `getopt' returns -1.
+ Then `woptind' 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 `wopterr' 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 `woptarg'. Two colons mean an option that
+ wants an optional arg; if there is text in the current ARGV-element,
+ it is returned in `woptarg', otherwise `woptarg' 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 `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 woption' 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
+_wgetopt_internal (int argc, wchar_t *const *argv, const wchar_t *optstring,
+ const struct woption *longopts, int *longind, int long_only)
+{
+ woptarg = NULL;
+
+ if (woptind == 0 || !__getopt_initialized)
+ {
+ if (woptind == 0)
+ woptind = 1; /* Don't scan ARGV[0], the program name. */
+ optstring = _getopt_initialize (argc, argv, optstring);
+ __getopt_initialized = 1;
+ }
+
+ /* Test whether ARGV[woptind] 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[woptind][0] != L'-' || argv[woptind][1] == L'\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 > woptind)
+ last_nonopt = woptind;
+ if (first_nonopt > woptind)
+ first_nonopt = woptind;
+
+ 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 != woptind)
+ exchange ((wchar_t **) argv);
+ else if (last_nonopt != woptind)
+ first_nonopt = woptind;
+
+ /* Skip any additional non-options
+ and extend the range of non-options previously skipped. */
+
+ while (woptind < argc && NONOPTION_P)
+ woptind++;
+ last_nonopt = woptind;
+ }
+
+ /* 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 (woptind != argc && !wcscmp (argv[woptind], L"--"))
+ {
+ woptind++;
+
+ if (first_nonopt != last_nonopt && last_nonopt != woptind)
+ exchange ((wchar_t **) argv);
+ else if (first_nonopt == last_nonopt)
+ first_nonopt = woptind;
+ last_nonopt = argc;
+
+ woptind = argc;
+ }
+
+ /* If we have done all the ARGV-elements, stop the scan
+ and back over any non-options that we skipped and permuted. */
+
+ if (woptind == 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)
+ woptind = 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;
+ woptarg = argv[woptind++];
+ return 1;
+ }
+
+ /* We have found another option-ARGV-element.
+ Skip the initial punctuation. */
+
+ nextchar = (argv[woptind] + 1
+ + (longopts != NULL && argv[woptind][1] == L'-'));
+ }
+
+ /* 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[woptind][1] == L'-'
+ || (long_only && (argv[woptind][2] || !wcschr (optstring, argv[woptind][1])))))
+ {
+ wchar_t *nameend;
+ const struct woption *p;
+ const struct woption *pfound = NULL;
+ int exact = 0;
+ int ambig = 0;
+ int indfound = -1;
+ int option_index;
+
+ for (nameend = nextchar; *nameend && *nameend != L'='; 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 (!wcsncmp (p->name, nextchar, nameend - nextchar))
+ {
+ if ((unsigned int) (nameend - nextchar)
+ == (unsigned int) wcslen (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 (wopterr)
+ fwprintf (stderr, L"%ls: option `%ls' is ambiguous\n",
+ argv[0], argv[woptind]);
+ nextchar += wcslen (nextchar);
+ woptind++;
+ woptopt = 0;
+ return L'?';
+ }
+
+ if (pfound != NULL)
+ {
+ option_index = indfound;
+ woptind++;
+ 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)
+ woptarg = nameend + 1;
+ else
+ {
+ if (wopterr) {
+ if (argv[woptind - 1][1] == L'-')
+ /* --option */
+ fwprintf (stderr,
+ L"%ls: option `--%ls' doesn't allow an argument\n",
+ argv[0], pfound->name);
+ else
+ /* +option or -option */
+ fwprintf (stderr,
+ L"%ls: option `%lc%ls' doesn't allow an argument\n",
+ argv[0], argv[woptind - 1][0], pfound->name);
+ }
+
+ nextchar += wcslen (nextchar);
+
+ woptopt = pfound->val;
+ return L'?';
+ }
+ }
+ else if (pfound->has_arg == 1)
+ {
+ if (woptind < argc)
+ woptarg = argv[woptind++];
+ else
+ {
+ if (wopterr)
+ fwprintf (stderr,
+ L"%ls: option `%ls' requires an argument\n",
+ argv[0], argv[woptind - 1]);
+ nextchar += wcslen (nextchar);
+ woptopt = pfound->val;
+ return optstring[0] == L':' ? L':' : L'?';
+ }
+ }
+ nextchar += wcslen (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 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[woptind][1] == L'-'
+ || wcschr (optstring, *nextchar) == NULL)
+ {
+ if (wopterr)
+ {
+ if (argv[woptind][1] == '-')
+ /* --option */
+ fwprintf (stderr, L"%ls: unrecognized option `--%ls'\n",
+ argv[0], nextchar);
+ else
+ /* +option or -option */
+ fwprintf (stderr, L"%ls: unrecognized option `%lc%ls'\n",
+ argv[0], argv[woptind][0], nextchar);
+ }
+ nextchar = (wchar_t *) L"";
+ woptind++;
+ woptopt = 0;
+ return L'?';
+ }
+ }
+
+ /* Look at and handle the next short option-character. */
+
+ {
+ wchar_t c = *nextchar++;
+ wchar_t *temp = wcschr (optstring, c);
+
+ /* Increment `woptind' when we start to process its last character. */
+ if (*nextchar == L'\0')
+ ++woptind;
+
+ if (temp == NULL || c == L':')
+ {
+ if (wopterr)
+ {
+ if (posixly_correct)
+ /* 1003.2 specifies the format of this message. */
+ fwprintf (stderr, L"%ls: illegal option -- %lc\n",
+ argv[0], c);
+ else
+ fwprintf (stderr, L"%ls: invalid option -- %lc\n",
+ argv[0], c);
+ }
+ woptopt = c;
+ return L'?';
+ }
+ /* Convenience. Treat POSIX -W foo same as long option --foo */
+ if (temp[0] == L'W' && temp[1] == L';')
+ {
+ wchar_t *nameend;
+ const struct woption *p;
+ const struct woption *pfound = NULL;
+ int exact = 0;
+ int ambig = 0;
+ int indfound = 0;
+ int option_index;
+
+ /* This is an option that requires an argument. */
+ if (*nextchar != L'\0')
+ {
+ woptarg = nextchar;
+ /* If we end this ARGV-element by taking the rest as an arg,
+ we must advance to the next element now. */
+ woptind++;
+ }
+ else if (woptind == argc)
+ {
+ if (wopterr)
+ {
+ /* 1003.2 specifies the format of this message. */
+ fwprintf (stderr, L"%ls: option requires an argument -- %lc\n",
+ argv[0], c);
+ }
+ woptopt = c;
+ if (optstring[0] == L':')
+ c = L':';
+ else
+ c = L'?';
+ return c;
+ }
+ else
+ /* We already incremented `woptind' once;
+ increment it again when taking next ARGV-elt as argument. */
+ woptarg = argv[woptind++];
+
+ /* woptarg is now the argument, see if it's in the
+ table of longopts. */
+
+ for (nextchar = nameend = woptarg; *nameend && *nameend != L'='; 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 (!wcsncmp (p->name, nextchar, nameend - nextchar))
+ {
+ if ((unsigned int) (nameend - nextchar) == wcslen (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 (wopterr)
+ fwprintf (stderr, L"%ls: option `-W %ls' is ambiguous\n",
+ argv[0], argv[woptind]);
+ nextchar += wcslen (nextchar);
+ woptind++;
+ return L'?';
+ }
+ 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)
+ woptarg = nameend + 1;
+ else
+ {
+ if (wopterr)
+ fwprintf (stderr, L"\
+%ls: option `-W %ls' doesn't allow an argument\n",
+ argv[0], pfound->name);
+
+ nextchar += wcslen (nextchar);
+ return L'?';
+ }
+ }
+ else if (pfound->has_arg == 1)
+ {
+ if (woptind < argc)
+ woptarg = argv[woptind++];
+ else
+ {
+ if (wopterr)
+ fwprintf (stderr,
+ L"%ls: option `%ls' requires an argument\n",
+ argv[0], argv[woptind - 1]);
+ nextchar += wcslen (nextchar);
+ return optstring[0] == L':' ? L':' : L'?';
+ }
+ }
+ nextchar += wcslen (nextchar);
+ if (longind != NULL)
+ *longind = option_index;
+ if (pfound->flag)
+ {
+ *(pfound->flag) = pfound->val;
+ return 0;
+ }
+ return pfound->val;
+ }
+ nextchar = NULL;
+ return L'W'; /* Let the application handle it. */
+ }
+ if (temp[1] == L':')
+ {
+ if (temp[2] == L':')
+ {
+ /* This is an option that accepts an argument optionally. */
+ if (*nextchar != L'\0')
+ {
+ woptarg = nextchar;
+ woptind++;
+ }
+ else
+ woptarg = NULL;
+ nextchar = NULL;
+ }
+ else
+ {
+ /* This is an option that requires an argument. */
+ if (*nextchar != L'\0')
+ {
+ woptarg = nextchar;
+ /* If we end this ARGV-element by taking the rest as an arg,
+ we must advance to the next element now. */
+ woptind++;
+ }
+ else if (woptind == argc)
+ {
+ if (wopterr)
+ {
+ /* 1003.2 specifies the format of this message. */
+ fwprintf (stderr,
+ L"%ls: option requires an argument -- %lc\n",
+ argv[0], c);
+ }
+ woptopt = c;
+ if (optstring[0] == L':')
+ c = L':';
+ else
+ c = L'?';
+ }
+ else
+ /* We already incremented `woptind' once;
+ increment it again when taking next ARGV-elt as argument. */
+ woptarg = argv[woptind++];
+ nextchar = NULL;
+ }
+ }
+ return c;
+ }
+}
+
+int
+wgetopt (int argc, wchar_t *const *argv, const wchar_t *optstring)
+{
+ return _wgetopt_internal (argc, argv, optstring,
+ (const struct woption *) 0,
+ (int *) 0,
+ 0);
+}
+
+int
+wgetopt_long (int argc, wchar_t * const *argv, const wchar_t *options,
+ const struct woption *long_options, int *opt_index)
+{
+ return _wgetopt_internal (argc, argv, options, long_options, opt_index, 0);
+}
+
+/* Like getopt_long, but '-' as well as '--' can indicate a long option.
+ If an option that starts with '-' (not '--') doesn't match a long option,
+ but does match a short option, it is parsed as a short option
+ instead. */
+int
+wgetopt_long_only (int argc, wchar_t * const *argv, const wchar_t *options,
+ const struct woption *long_options, int *opt_index)
+{
+ return _wgetopt_internal (argc, argv, options, long_options, opt_index, 1);
+}
git://wimlib.net / wimlib / commitdiff