| /* $OpenBSD: getopt_long.c,v 1.26 2013/06/08 22:47:56 millert Exp $ */ | |
| /* $NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $ */ | |
| /* | |
| * Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com> | |
| * | |
| * Permission to use, copy, modify, and distribute this software for any | |
| * purpose with or without fee is hereby granted, provided that the above | |
| * copyright notice and this permission notice appear in all copies. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| * | |
| * Sponsored in part by the Defense Advanced Research Projects | |
| * Agency (DARPA) and Air Force Research Laboratory, Air Force | |
| * Materiel Command, USAF, under agreement number F39502-99-1-0512. | |
| */ | |
| /*- | |
| * Copyright (c) 2000 The NetBSD Foundation, Inc. | |
| * All rights reserved. | |
| * | |
| * This code is derived from software contributed to The NetBSD Foundation | |
| * by Dieter Baron and Thomas Klausner. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions | |
| * are met: | |
| * 1. Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * 2. Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | |
| * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| * POSSIBILITY OF SUCH DAMAGE. | |
| */ | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <sys/cdefs.h> | |
| #include <log/getopt.h> | |
| #define PRINT_ERROR ((context->opterr) && (*options != ':')) | |
| #define FLAG_PERMUTE 0x01 // permute non-options to the end of argv | |
| #define FLAG_ALLARGS 0x02 // treat non-options as args to option "-1" | |
| // return values | |
| #define BADCH (int)'?' | |
| #define BADARG ((*options == ':') ? (int)':' : (int)'?') | |
| #define INORDER (int)1 | |
| #define D_PREFIX 0 | |
| #define DD_PREFIX 1 | |
| #define W_PREFIX 2 | |
| // Compute the greatest common divisor of a and b. | |
| static int gcd(int a, int b) { | |
| int c = a % b; | |
| while (c) { | |
| a = b; | |
| b = c; | |
| c = a % b; | |
| } | |
| return b; | |
| } | |
| // Exchange the block from nonopt_start to nonopt_end with the block from | |
| // nonopt_end to opt_end (keeping the same order of arguments in each block). | |
| // Returns optind - (nonopt_end - nonopt_start) for convenience. | |
| static int permute_args(getopt_context* context, char* const* nargv) { | |
| // compute lengths of blocks and number and size of cycles | |
| int nnonopts = context->nonopt_end - context->nonopt_start; | |
| int nopts = context->optind - context->nonopt_end; | |
| int ncycle = gcd(nnonopts, nopts); | |
| int cyclelen = (context->optind - context->nonopt_start) / ncycle; | |
| for (int i = 0; i < ncycle; i++) { | |
| int cstart = context->nonopt_end + i; | |
| int pos = cstart; | |
| for (int j = 0; j < cyclelen; j++) { | |
| if (pos >= context->nonopt_end) { | |
| pos -= nnonopts; | |
| } else { | |
| pos += nopts; | |
| } | |
| char* swap = nargv[pos]; | |
| const_cast<char**>(nargv)[pos] = nargv[cstart]; | |
| const_cast<char**>(nargv)[cstart] = swap; | |
| } | |
| } | |
| return context->optind - (context->nonopt_end - context->nonopt_start); | |
| } | |
| // parse_long_options_r -- | |
| // Parse long options in argc/argv argument vector. | |
| // Returns -1 if short_too is set and the option does not match long_options. | |
| static int parse_long_options_r(char* const* nargv, const char* options, | |
| const struct option* long_options, int* idx, | |
| bool short_too, struct getopt_context* context) { | |
| const char* current_argv = context->place; | |
| const char* current_dash; | |
| switch (context->dash_prefix) { | |
| case D_PREFIX: | |
| current_dash = "-"; | |
| break; | |
| case DD_PREFIX: | |
| current_dash = "--"; | |
| break; | |
| case W_PREFIX: | |
| current_dash = "-W "; | |
| break; | |
| default: | |
| current_dash = ""; | |
| break; | |
| } | |
| context->optind++; | |
| const char* has_equal; | |
| size_t current_argv_len; | |
| if (!!(has_equal = strchr(current_argv, '='))) { | |
| // argument found (--option=arg) | |
| current_argv_len = has_equal - current_argv; | |
| has_equal++; | |
| } else { | |
| current_argv_len = strlen(current_argv); | |
| } | |
| int match = -1; | |
| bool exact_match = false; | |
| bool second_partial_match = false; | |
| for (int i = 0; long_options[i].name; i++) { | |
| // find matching long option | |
| if (strncmp(current_argv, long_options[i].name, current_argv_len)) { | |
| continue; | |
| } | |
| if (strlen(long_options[i].name) == current_argv_len) { | |
| // exact match | |
| match = i; | |
| exact_match = true; | |
| break; | |
| } | |
| // If this is a known short option, don't allow | |
| // a partial match of a single character. | |
| if (short_too && current_argv_len == 1) continue; | |
| if (match == -1) { // first partial match | |
| match = i; | |
| } else if (long_options[i].has_arg != long_options[match].has_arg || | |
| long_options[i].flag != long_options[match].flag || | |
| long_options[i].val != long_options[match].val) { | |
| second_partial_match = true; | |
| } | |
| } | |
| if (!exact_match && second_partial_match) { | |
| // ambiguous abbreviation | |
| if (PRINT_ERROR) { | |
| fprintf(context->optstderr ?: stderr, | |
| "option `%s%.*s' is ambiguous", current_dash, | |
| (int)current_argv_len, current_argv); | |
| } | |
| context->optopt = 0; | |
| return BADCH; | |
| } | |
| if (match != -1) { // option found | |
| if (long_options[match].has_arg == no_argument && has_equal) { | |
| if (PRINT_ERROR) { | |
| fprintf(context->optstderr ?: stderr, | |
| "option `%s%.*s' doesn't allow an argument", | |
| current_dash, (int)current_argv_len, current_argv); | |
| } | |
| // XXX: GNU sets optopt to val regardless of flag | |
| context->optopt = | |
| long_options[match].flag ? 0 : long_options[match].val; | |
| return BADCH; | |
| } | |
| if (long_options[match].has_arg == required_argument || | |
| long_options[match].has_arg == optional_argument) { | |
| if (has_equal) { | |
| context->optarg = has_equal; | |
| } else if (long_options[match].has_arg == required_argument) { | |
| // optional argument doesn't use next nargv | |
| context->optarg = nargv[context->optind++]; | |
| } | |
| } | |
| if ((long_options[match].has_arg == required_argument) && | |
| !context->optarg) { | |
| // Missing argument; leading ':' indicates no error | |
| // should be generated. | |
| if (PRINT_ERROR) { | |
| fprintf(context->optstderr ?: stderr, | |
| "option `%s%s' requires an argument", current_dash, | |
| current_argv); | |
| } | |
| // XXX: GNU sets optopt to val regardless of flag | |
| context->optopt = | |
| long_options[match].flag ? 0 : long_options[match].val; | |
| context->optind--; | |
| return BADARG; | |
| } | |
| } else { // unknown option | |
| if (short_too) { | |
| context->optind--; | |
| return -1; | |
| } | |
| if (PRINT_ERROR) { | |
| fprintf(context->optstderr ?: stderr, "unrecognized option `%s%s'", | |
| current_dash, current_argv); | |
| } | |
| context->optopt = 0; | |
| return BADCH; | |
| } | |
| if (idx) *idx = match; | |
| if (long_options[match].flag) { | |
| *long_options[match].flag = long_options[match].val; | |
| return 0; | |
| } | |
| return long_options[match].val; | |
| } | |
| // getopt_long_r -- | |
| // Parse argc/argv argument vector. | |
| int getopt_long_r(int nargc, char* const* nargv, const char* options, | |
| const struct option* long_options, int* idx, | |
| struct getopt_context* context) { | |
| if (!options) return -1; | |
| // XXX Some GNU programs (like cvs) set optind to 0 instead of | |
| // XXX using optreset. Work around this braindamage. | |
| if (!context->optind) context->optind = context->optreset = 1; | |
| // Disable GNU extensions if options string begins with a '+'. | |
| int flags = FLAG_PERMUTE; | |
| if (*options == '-') { | |
| flags |= FLAG_ALLARGS; | |
| } else if (*options == '+') { | |
| flags &= ~FLAG_PERMUTE; | |
| } | |
| if (*options == '+' || *options == '-') options++; | |
| context->optarg = nullptr; | |
| if (context->optreset) context->nonopt_start = context->nonopt_end = -1; | |
| start: | |
| if (context->optreset || !*context->place) { // update scanning pointer | |
| context->optreset = 0; | |
| if (context->optind >= nargc) { // end of argument vector | |
| context->place = EMSG; | |
| if (context->nonopt_end != -1) { | |
| // do permutation, if we have to | |
| context->optind = permute_args(context, nargv); | |
| } else if (context->nonopt_start != -1) { | |
| // If we skipped non-options, set optind to the first of them. | |
| context->optind = context->nonopt_start; | |
| } | |
| context->nonopt_start = context->nonopt_end = -1; | |
| return -1; | |
| } | |
| if (*(context->place = nargv[context->optind]) != '-' || | |
| context->place[1] == '\0') { | |
| context->place = EMSG; // found non-option | |
| if (flags & FLAG_ALLARGS) { | |
| // GNU extension: return non-option as argument to option 1 | |
| context->optarg = nargv[context->optind++]; | |
| return INORDER; | |
| } | |
| if (!(flags & FLAG_PERMUTE)) { | |
| // If no permutation wanted, stop parsing at first non-option. | |
| return -1; | |
| } | |
| // do permutation | |
| if (context->nonopt_start == -1) { | |
| context->nonopt_start = context->optind; | |
| } else if (context->nonopt_end != -1) { | |
| context->nonopt_start = permute_args(context, nargv); | |
| context->nonopt_end = -1; | |
| } | |
| context->optind++; | |
| // process next argument | |
| goto start; | |
| } | |
| if (context->nonopt_start != -1 && context->nonopt_end == -1) { | |
| context->nonopt_end = context->optind; | |
| } | |
| // If we have "-" do nothing, if "--" we are done. | |
| if (context->place[1] != '\0' && *++(context->place) == '-' && | |
| context->place[1] == '\0') { | |
| context->optind++; | |
| context->place = EMSG; | |
| // We found an option (--), so if we skipped | |
| // non-options, we have to permute. | |
| if (context->nonopt_end != -1) { | |
| context->optind = permute_args(context, nargv); | |
| } | |
| context->nonopt_start = context->nonopt_end = -1; | |
| return -1; | |
| } | |
| } | |
| int optchar; | |
| // Check long options if: | |
| // 1) we were passed some | |
| // 2) the arg is not just "-" | |
| // 3) either the arg starts with -- we are getopt_long_only() | |
| if (long_options && context->place != nargv[context->optind] && | |
| (*context->place == '-')) { | |
| bool short_too = false; | |
| context->dash_prefix = D_PREFIX; | |
| if (*context->place == '-') { | |
| context->place++; // --foo long option | |
| context->dash_prefix = DD_PREFIX; | |
| } else if (*context->place != ':' && strchr(options, *context->place)) { | |
| short_too = true; // could be short option too | |
| } | |
| optchar = parse_long_options_r(nargv, options, long_options, idx, | |
| short_too, context); | |
| if (optchar != -1) { | |
| context->place = EMSG; | |
| return optchar; | |
| } | |
| } | |
| const char* oli; // option letter list index | |
| if ((optchar = (int)*(context->place)++) == (int)':' || | |
| (optchar == (int)'-' && *context->place != '\0') || | |
| !(oli = strchr(options, optchar))) { | |
| // 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)'-' && *context->place == '\0') return -1; | |
| if (!*context->place) context->optind++; | |
| if (PRINT_ERROR) { | |
| fprintf(context->optstderr ?: stderr, "invalid option -- %c", | |
| optchar); | |
| } | |
| context->optopt = optchar; | |
| return BADCH; | |
| } | |
| static const char recargchar[] = "option requires an argument -- %c"; | |
| if (long_options && optchar == 'W' && oli[1] == ';') { | |
| // -W long-option | |
| if (*context->place) { // no space | |
| ; // NOTHING | |
| } else if (++(context->optind) >= nargc) { // no arg | |
| context->place = EMSG; | |
| if (PRINT_ERROR) { | |
| fprintf(context->optstderr ?: stderr, recargchar, optchar); | |
| } | |
| context->optopt = optchar; | |
| return BADARG; | |
| } else { // white space | |
| context->place = nargv[context->optind]; | |
| } | |
| context->dash_prefix = W_PREFIX; | |
| optchar = parse_long_options_r(nargv, options, long_options, idx, false, | |
| context); | |
| context->place = EMSG; | |
| return optchar; | |
| } | |
| if (*++oli != ':') { // doesn't take argument | |
| if (!*context->place) context->optind++; | |
| } else { // takes (optional) argument | |
| context->optarg = nullptr; | |
| if (*context->place) { // no white space | |
| context->optarg = context->place; | |
| } else if (oli[1] != ':') { // arg not optional | |
| if (++(context->optind) >= nargc) { // no arg | |
| context->place = EMSG; | |
| if (PRINT_ERROR) { | |
| fprintf(context->optstderr ?: stderr, recargchar, optchar); | |
| } | |
| context->optopt = optchar; | |
| return BADARG; | |
| } | |
| context->optarg = nargv[context->optind]; | |
| } | |
| context->place = EMSG; | |
| context->optind++; | |
| } | |
| // dump back option letter | |
| return optchar; | |
| } |