| /* 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 */ |
