560 lines
20 KiB
C
560 lines
20 KiB
C
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/*
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* Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Dieter Baron and Thomas Klausner.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @file
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@brief Implementations of getopt() and getopt_long() work-alike functions.
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This code was taken from FreeBSD and slightly modified, mostly to rename
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symbols with external linkage to avoid naming conflicts in systems where
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there are real getopt()/getopt_long() implementations, and for portability.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <redfs.h>
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#include <redgetopt.h>
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#include <redtestutils.h>
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#include <rederrno.h>
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int32_t red_opterr = 1; /* if error message should be printed */
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int32_t red_optind = 1; /* index into parent argv vector */
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int32_t red_optopt = '?'; /* character checked for validity */
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int32_t red_optreset; /* reset RedGetopt */
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const char *red_optarg; /* argument associated with option */
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#define PRINT_ERROR ((red_opterr) && (*options != ':'))
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#define FLAG_PERMUTE 0x01 /* permute non-options to the end of argv */
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#define FLAG_ALLARGS 0x02 /* treat non-options as args to option "-1" */
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#define FLAG_LONGONLY 0x04 /* operate as RedGetoptLongOnly */
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/* return values */
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#define BADCH (int)'?'
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#define BADARG ((*options == ':') ? (int)':' : (int)'?')
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#define INORDER (int)1
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#define EMSG ""
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#define NO_PREFIX (-1)
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#define D_PREFIX 0
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#define DD_PREFIX 1
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#define W_PREFIX 2
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static int gcd(int a, int b);
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static void permute_args(int panonopt_start, int panonopt_end, int opt_end, char * const *nargv);
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static int parse_long_options(char * const *nargv, const char *options, const REDOPTION *long_options, int32_t *idx, int short_too, int flags);
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static int getopt_internal(int nargc, char * const *nargv, const char *options, const REDOPTION *long_options, int32_t *idx, int flags);
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static const char *place = EMSG; /* option letter processing */
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/* XXX: set red_optreset to 1 rather than these two */
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static int nonopt_start = -1; /* first non option argument (for permute) */
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static int nonopt_end = -1; /* first option after non options (for permute) */
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/* Error messages */
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static const char recargchar[] = "option requires an argument -- %c\n";
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static const char illoptchar[] = "illegal option -- %c\n"; /* From P1003.2 */
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static int dash_prefix = NO_PREFIX;
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static const char gnuoptchar[] = "invalid option -- %c\n";
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static const char recargstring[] = "option `%s%s' requires an argument\n";
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static const char ambig[] = "option `%s%s' is ambiguous\n";
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static const char noarg[] = "option `%s%s' doesn't allow an argument\n";
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static const char illoptstring[] = "unrecognized option `%s%s'\n";
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/*
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* Compute the greatest common divisor of a and b.
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*/
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static int
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gcd(int a, int b)
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{
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int c;
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c = a % b;
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while (c != 0) {
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a = b;
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b = c;
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c = a % b;
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}
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return (b);
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}
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/*
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* Exchange the block from nonopt_start to nonopt_end with the block
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* from nonopt_end to opt_end (keeping the same order of arguments
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* in each block).
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*/
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static void
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permute_args(int panonopt_start, int panonopt_end, int opt_end,
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char * const *nargv)
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{
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int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
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char *swap;
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/*
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* compute lengths of blocks and number and size of cycles
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*/
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nnonopts = panonopt_end - panonopt_start;
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nopts = opt_end - panonopt_end;
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ncycle = gcd(nnonopts, nopts);
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cyclelen = (opt_end - panonopt_start) / ncycle;
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for (i = 0; i < ncycle; i++) {
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cstart = panonopt_end+i;
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pos = cstart;
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for (j = 0; j < cyclelen; j++) {
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if (pos >= panonopt_end)
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pos -= nnonopts;
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else
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pos += nopts;
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swap = nargv[pos];
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((char **) nargv)[pos] = nargv[cstart];
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((char **)nargv)[cstart] = swap;
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}
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}
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}
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/*
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* parse_long_options --
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* Parse long options in argc/argv argument vector.
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* Returns -1 if short_too is set and the option does not match long_options.
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*/
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static int
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parse_long_options(char * const *nargv, const char *options,
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const REDOPTION *long_options, int32_t *idx, int short_too, int flags)
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{
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const char *current_argv, *has_equal, *current_dash;
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size_t current_argv_len;
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int i, match, exact_match, second_partial_match;
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current_argv = place;
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switch (dash_prefix) {
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case D_PREFIX:
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current_dash = "-";
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break;
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case DD_PREFIX:
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current_dash = "--";
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break;
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case W_PREFIX:
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current_dash = "-W ";
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break;
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default:
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current_dash = "";
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break;
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}
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match = -1;
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exact_match = 0;
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second_partial_match = 0;
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red_optind++;
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if ((has_equal = strchr(current_argv, '=')) != NULL) {
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/* argument found (--option=arg) */
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current_argv_len = has_equal - current_argv;
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has_equal++;
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} else
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current_argv_len = strlen(current_argv);
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for (i = 0; long_options[i].name; i++) {
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/* find matching long option */
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if (strncmp(current_argv, long_options[i].name,
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current_argv_len))
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continue;
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if (strlen(long_options[i].name) == current_argv_len) {
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/* exact match */
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match = i;
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exact_match = 1;
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break;
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}
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/*
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* If this is a known short option, don't allow
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* a partial match of a single character.
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*/
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if (short_too && current_argv_len == 1)
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continue;
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if (match == -1) /* first partial match */
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match = i;
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else if ((flags & FLAG_LONGONLY) ||
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long_options[i].has_arg !=
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long_options[match].has_arg ||
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long_options[i].flag != long_options[match].flag ||
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long_options[i].val != long_options[match].val)
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second_partial_match = 1;
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}
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if (!exact_match && second_partial_match) {
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/* ambiguous abbreviation */
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if (PRINT_ERROR)
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fprintf(stderr,
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ambig,
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current_dash,
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current_argv);
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red_optopt = 0;
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return (BADCH);
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}
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if (match != -1) { /* option found */
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if (long_options[match].has_arg == red_no_argument
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&& has_equal) {
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if (PRINT_ERROR)
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fprintf(stderr,
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noarg,
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current_dash,
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current_argv);
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/*
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* XXX: GNU sets red_optopt to val regardless of flag
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*/
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if (long_options[match].flag == NULL)
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red_optopt = long_options[match].val;
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else
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red_optopt = 0;
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return (BADCH);
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}
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if (long_options[match].has_arg == red_required_argument ||
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long_options[match].has_arg == red_optional_argument) {
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if (has_equal)
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red_optarg = has_equal;
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else if (long_options[match].has_arg ==
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red_required_argument) {
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/*
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* optional argument doesn't use next nargv
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*/
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red_optarg = nargv[red_optind++];
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}
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}
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if ((long_options[match].has_arg == red_required_argument)
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&& (red_optarg == NULL)) {
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/*
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* Missing argument; leading ':' indicates no error
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* should be generated.
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*/
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if (PRINT_ERROR)
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fprintf(stderr,
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recargstring,
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current_dash,
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current_argv);
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/*
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* XXX: GNU sets red_optopt to val regardless of flag
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*/
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if (long_options[match].flag == NULL)
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red_optopt = long_options[match].val;
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else
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red_optopt = 0;
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--red_optind;
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return (BADARG);
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}
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} else { /* unknown option */
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if (short_too) {
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--red_optind;
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return (-1);
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}
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if (PRINT_ERROR)
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fprintf(stderr,
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illoptstring,
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current_dash,
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current_argv);
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red_optopt = 0;
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return (BADCH);
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}
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if (idx)
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*idx = match;
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if (long_options[match].flag) {
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*long_options[match].flag = long_options[match].val;
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return (0);
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} else
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return (long_options[match].val);
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}
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/*
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* getopt_internal --
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* Parse argc/argv argument vector. Called by user level routines.
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*/
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static int
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getopt_internal(int nargc, char * const *nargv, const char *options,
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const REDOPTION *long_options, int32_t *idx, int flags)
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{
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char *oli; /* option letter list index */
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int optchar, short_too;
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if (options == NULL)
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return (-1);
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/*
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* XXX Some GNU programs (like cvs) set red_optind to 0 instead of
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* XXX using red_optreset. Work around this braindamage.
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*/
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if (red_optind == 0)
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red_optind = red_optreset = 1;
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/*
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* Disable GNU extensions if options string begins with a '+'.
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*/
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if (*options == '-')
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flags |= FLAG_ALLARGS;
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else if (*options == '+')
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flags &= ~FLAG_PERMUTE;
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if (*options == '+' || *options == '-')
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options++;
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red_optarg = NULL;
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if (red_optreset)
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nonopt_start = nonopt_end = -1;
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start:
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if (red_optreset || !*place) { /* update scanning pointer */
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red_optreset = 0;
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if (red_optind >= nargc) { /* end of argument vector */
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place = EMSG;
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if (nonopt_end != -1) {
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/* do permutation, if we have to */
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permute_args(nonopt_start, nonopt_end,
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red_optind, nargv);
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red_optind -= nonopt_end - nonopt_start;
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}
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else if (nonopt_start != -1) {
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/*
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* If we skipped non-options, set red_optind
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* to the first of them.
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*/
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red_optind = nonopt_start;
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}
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nonopt_start = nonopt_end = -1;
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return (-1);
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}
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if (*(place = nargv[red_optind]) != '-' || place[1] == '\0') {
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place = EMSG; /* found non-option */
|
||
|
|
if (flags & FLAG_ALLARGS) {
|
||
|
|
/*
|
||
|
|
* GNU extension:
|
||
|
|
* return non-option as argument to option 1
|
||
|
|
*/
|
||
|
|
red_optarg = nargv[red_optind++];
|
||
|
|
return (INORDER);
|
||
|
|
}
|
||
|
|
if (!(flags & FLAG_PERMUTE)) {
|
||
|
|
/*
|
||
|
|
* If no permutation wanted, stop parsing
|
||
|
|
* at first non-option.
|
||
|
|
*/
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
/* do permutation */
|
||
|
|
if (nonopt_start == -1)
|
||
|
|
nonopt_start = red_optind;
|
||
|
|
else if (nonopt_end != -1) {
|
||
|
|
permute_args(nonopt_start, nonopt_end,
|
||
|
|
red_optind, nargv);
|
||
|
|
nonopt_start = red_optind -
|
||
|
|
(nonopt_end - nonopt_start);
|
||
|
|
nonopt_end = -1;
|
||
|
|
}
|
||
|
|
red_optind++;
|
||
|
|
/* process next argument */
|
||
|
|
goto start;
|
||
|
|
}
|
||
|
|
if (nonopt_start != -1 && nonopt_end == -1)
|
||
|
|
nonopt_end = red_optind;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If we have "-" do nothing, if "--" we are done.
|
||
|
|
*/
|
||
|
|
if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
|
||
|
|
red_optind++;
|
||
|
|
place = EMSG;
|
||
|
|
/*
|
||
|
|
* We found an option (--), so if we skipped
|
||
|
|
* non-options, we have to permute.
|
||
|
|
*/
|
||
|
|
if (nonopt_end != -1) {
|
||
|
|
permute_args(nonopt_start, nonopt_end,
|
||
|
|
red_optind, nargv);
|
||
|
|
red_optind -= nonopt_end - nonopt_start;
|
||
|
|
}
|
||
|
|
nonopt_start = nonopt_end = -1;
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check long options if:
|
||
|
|
* 1) we were passed some
|
||
|
|
* 2) the arg is not just "-"
|
||
|
|
* 3) either the arg starts with -- we are RedGetoptLongOnly()
|
||
|
|
*/
|
||
|
|
if (long_options != NULL && place != nargv[red_optind] &&
|
||
|
|
(*place == '-' || (flags & FLAG_LONGONLY))) {
|
||
|
|
short_too = 0;
|
||
|
|
dash_prefix = D_PREFIX;
|
||
|
|
if (*place == '-') {
|
||
|
|
place++; /* --foo long option */
|
||
|
|
dash_prefix = DD_PREFIX;
|
||
|
|
} else if (*place != ':' && strchr(options, *place) != NULL)
|
||
|
|
short_too = 1; /* could be short option too */
|
||
|
|
|
||
|
|
optchar = parse_long_options(nargv, options, long_options,
|
||
|
|
idx, short_too, flags);
|
||
|
|
if (optchar != -1) {
|
||
|
|
place = EMSG;
|
||
|
|
return (optchar);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((optchar = (int)*place++) == (int)':' ||
|
||
|
|
(optchar == (int)'-' && *place != '\0') ||
|
||
|
|
(oli = strchr(options, optchar)) == NULL) {
|
||
|
|
/*
|
||
|
|
* If the user specified "-" and '-' isn't listed in
|
||
|
|
* options, return -1 (non-option) as per POSIX.
|
||
|
|
* Otherwise, it is an unknown option character (or ':').
|
||
|
|
*/
|
||
|
|
if (optchar == (int)'-' && *place == '\0')
|
||
|
|
return (-1);
|
||
|
|
if (!*place)
|
||
|
|
++red_optind;
|
||
|
|
if (PRINT_ERROR)
|
||
|
|
fprintf(stderr, gnuoptchar, optchar);
|
||
|
|
red_optopt = optchar;
|
||
|
|
return (BADCH);
|
||
|
|
}
|
||
|
|
if (long_options != NULL && optchar == 'W' && oli[1] == ';') {
|
||
|
|
/* -W long-option */
|
||
|
|
if (*place) /* no space */
|
||
|
|
/* NOTHING */;
|
||
|
|
else if (++red_optind >= nargc) { /* no arg */
|
||
|
|
place = EMSG;
|
||
|
|
if (PRINT_ERROR)
|
||
|
|
fprintf(stderr, recargchar, optchar);
|
||
|
|
red_optopt = optchar;
|
||
|
|
return (BADARG);
|
||
|
|
} else /* white space */
|
||
|
|
place = nargv[red_optind];
|
||
|
|
dash_prefix = W_PREFIX;
|
||
|
|
optchar = parse_long_options(nargv, options, long_options,
|
||
|
|
idx, 0, flags);
|
||
|
|
place = EMSG;
|
||
|
|
return (optchar);
|
||
|
|
}
|
||
|
|
if (*++oli != ':') { /* doesn't take argument */
|
||
|
|
if (!*place)
|
||
|
|
++red_optind;
|
||
|
|
} else { /* takes (optional) argument */
|
||
|
|
red_optarg = NULL;
|
||
|
|
if (*place) /* no white space */
|
||
|
|
red_optarg = place;
|
||
|
|
else if (oli[1] != ':') { /* arg not optional */
|
||
|
|
if (++red_optind >= nargc) { /* no arg */
|
||
|
|
place = EMSG;
|
||
|
|
if (PRINT_ERROR)
|
||
|
|
fprintf(stderr, recargchar, optchar);
|
||
|
|
red_optopt = optchar;
|
||
|
|
return (BADARG);
|
||
|
|
} else
|
||
|
|
red_optarg = nargv[red_optind];
|
||
|
|
}
|
||
|
|
place = EMSG;
|
||
|
|
++red_optind;
|
||
|
|
}
|
||
|
|
/* dump back option letter */
|
||
|
|
return (optchar);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** @brief Get option character from command line argument list.
|
||
|
|
|
||
|
|
For more details, consult the getopt() man pages, since this function is
|
||
|
|
generally similar.
|
||
|
|
|
||
|
|
@param nargc Number of arguments (argc passed into main()).
|
||
|
|
@param nargv Argument vector (argv passed into main()).
|
||
|
|
@param options String of option characters.
|
||
|
|
|
||
|
|
@return The next known option character in @p options. If a character not
|
||
|
|
found in @p options is found or if an option is missing an argument,
|
||
|
|
it returns '?'. Returns -1 when the argument list is exhausted.
|
||
|
|
*/
|
||
|
|
int32_t RedGetopt(
|
||
|
|
int32_t nargc,
|
||
|
|
char * const *nargv,
|
||
|
|
const char *options)
|
||
|
|
{
|
||
|
|
return getopt_internal(nargc, nargv, options, NULL, NULL, FLAG_PERMUTE);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** @brief Get long options from command line argument list.
|
||
|
|
|
||
|
|
For more details, consult the getopt_long() man pages, since this function
|
||
|
|
is generally similar.
|
||
|
|
|
||
|
|
@param nargc Number of arguments (argc passed into main()).
|
||
|
|
@param nargv Argument vector (argv passed into main()).
|
||
|
|
@param options String of option characters.
|
||
|
|
@param long_options The long options; the last element of this array must be
|
||
|
|
filled with zeroes.
|
||
|
|
@param idx If non-NULL, then populated with the index of the long
|
||
|
|
option relative to @p long_options.
|
||
|
|
|
||
|
|
@return If the flag field in REDOPTION is NULL, returns the value specified
|
||
|
|
in the val field, which is usually just the corresponding short
|
||
|
|
option. If flag is non-NULL, returns zero and stores val in the
|
||
|
|
location pointed to by flag. Returns ':' if an option was missing
|
||
|
|
its argument, '?' for an unknown option, and -1 when the argument
|
||
|
|
list is exhausted.
|
||
|
|
*/
|
||
|
|
int32_t RedGetoptLong(
|
||
|
|
int32_t nargc,
|
||
|
|
char * const *nargv,
|
||
|
|
const char *options,
|
||
|
|
const REDOPTION *long_options,
|
||
|
|
int32_t *idx)
|
||
|
|
{
|
||
|
|
return getopt_internal(nargc, nargv, options, long_options, idx, FLAG_PERMUTE);
|
||
|
|
}
|
||
|
|
|