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295a62f538
Now help tags are defined as enum values to avoid vector of strings. The internal flags are represented by bitmask to shrink size.
350 lines
10 KiB
C++
350 lines
10 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "OptionParser.h"
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#include <unistd.h>
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#include <getopt.h>
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#include <cstring>
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#include <istream>
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#include <utility>
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#include "util.h"
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#include "OptionHandlerImpl.h"
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#include "Option.h"
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#include "A2STR.h"
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#include "a2functional.h"
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#include "array_fun.h"
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#include "OptionHandlerFactory.h"
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#include "DlAbortEx.h"
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#include "error_code.h"
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#include "prefs.h"
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#include "UnknownOptionException.h"
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namespace aria2 {
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OptionParser::OptionParser()
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: handlers_(option::countOption()),
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shortOpts_(256)
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{}
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OptionParser::~OptionParser() {}
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namespace {
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template<typename InputIterator>
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size_t countPublicOption(InputIterator first, InputIterator last)
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{
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size_t count = 0;
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for(; first != last; ++first) {
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if(*first && !(*first)->isHidden()) {
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++count;
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}
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}
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return count;
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}
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} // namespace
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namespace {
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template<typename InputIterator>
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void putOptions(struct option* longOpts, int* plopt,
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InputIterator first, InputIterator last)
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{
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for(; first != last; ++first) {
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if(*first && !(*first)->isHidden()) {
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#ifdef HAVE_OPTION_CONST_NAME
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(*longOpts).name = (*first)->getName();
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#else // !HAVE_OPTION_CONST_NAME
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(*longOpts).name = strdup((*first)->getName());
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#endif // !HAVE_OPTION_CONST_NAME
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switch((*first)->getArgType()) {
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case OptionHandler::REQ_ARG:
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(*longOpts).has_arg = required_argument;
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break;
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case OptionHandler::OPT_ARG:
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(*longOpts).has_arg = optional_argument;
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break;
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case OptionHandler::NO_ARG:
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(*longOpts).has_arg = no_argument;
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break;
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default:
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abort();
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}
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if((*first)->getShortName() == 0) {
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(*longOpts).flag = plopt;
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(*longOpts).val = (*first)->getPref()->i;
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} else {
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(*longOpts).flag = 0;
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(*longOpts).val = (*first)->getShortName();
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}
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++longOpts;
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}
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}
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(*longOpts).name = 0;
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(*longOpts).has_arg = 0;
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(*longOpts).flag = 0;
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(*longOpts).val = 0;
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}
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} // namespace
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namespace {
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template<typename InputIterator>
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std::string createOptstring(InputIterator first, InputIterator last)
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{
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std::string str = "";
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for(; first != last; ++first) {
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if(*first && !(*first)->isHidden()) {
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if((*first)->getShortName() != 0) {
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str += (*first)->getShortName();
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if((*first)->getArgType() == OptionHandler::REQ_ARG) {
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str += ":";
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} else if((*first)->getArgType() == OptionHandler::OPT_ARG) {
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str += "::";
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}
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}
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}
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}
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return str;
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}
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} // namespace
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void OptionParser::parseArg
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(std::ostream& out, std::vector<std::string>& nonopts,
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int argc, char* argv[]) const
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{
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size_t numPublicOption = countPublicOption(handlers_.begin(),
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handlers_.end());
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int lopt;
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array_ptr<struct option> longOpts(new struct option[numPublicOption+1]);
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putOptions(longOpts, &lopt, handlers_.begin(), handlers_.end());
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std::string optstring = createOptstring(handlers_.begin(), handlers_.end());
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while(1) {
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int c = getopt_long(argc, argv, optstring.c_str(), longOpts, 0);
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if(c == -1) {
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break;
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}
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SharedHandle<OptionHandler> op;
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if(c == 0) {
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op = findById(lopt);
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} else if(c != '?') {
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op = findByShortName(c);
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} else {
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assert(c == '?');
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if(optind == 1) {
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throw DL_ABORT_EX2("Failed to parse command-line options.",
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error_code::OPTION_ERROR);
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}
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int optlen = strlen(argv[optind-1]);
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const char* optstr = argv[optind-1];
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for(; *optstr == '-'; ++optstr);
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int optstrlen = strlen(optstr);
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if(optstrlen+1 >= optlen) {
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// If this is short option form (1 '-' prefix), just throw
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// error here.
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throw DL_ABORT_EX2("Failed to parse command-line options.",
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error_code::OPTION_ERROR);
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}
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// There are 3 situations: 1) completely unknown option 2)
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// getopt_long() complained because too few arguments. 3)
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// option is ambiguous.
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int ambiguous = 0;
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for(int i = 1, len = option::countOption(); i < len; ++i) {
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const Pref* pref = option::i2p(i);
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const SharedHandle<OptionHandler>& h = find(pref);
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if(h && !h->isHidden()) {
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if(strcmp(pref->k, optstr) == 0) {
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// Exact match, this means getopt_long detected error
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// while handling this option.
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throw DL_ABORT_EX2("Failed to parse command-line options.",
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error_code::OPTION_ERROR);
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} else if(util::startsWith(pref->k, pref->k+strlen(pref->k),
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optstr, optstr+optstrlen)) {
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++ambiguous;
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}
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}
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}
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if(ambiguous == 1) {
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// This is successfully abbreviated option. So it must be case
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// 2).
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throw DL_ABORT_EX2("Failed to parse command-line options.",
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error_code::OPTION_ERROR);
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}
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throw UNKNOWN_OPTION_EXCEPTION(argv[optind-1]);
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}
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assert(op);
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out << op->getName() << "=";
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if(optarg) {
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out << optarg;
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if(op->getEraseAfterParse()) {
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for(char* p = optarg; *p != '\0'; ++p) {
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*p = '*';
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}
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}
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}
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out << "\n";
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}
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std::copy(argv+optind, argv+argc, std::back_inserter(nonopts));
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}
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void OptionParser::parse(Option& option, std::istream& is) const
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{
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std::string line;
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while(getline(is, line)) {
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if(line.empty() || line[0] == '#') {
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continue;
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}
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std::pair<Sip, Sip> nv;
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util::divide(nv, line.begin(), line.end(), '=');
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if(nv.first.first == nv.first.second) {
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continue;
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}
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const Pref* pref =
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option::k2p(std::string(nv.first.first, nv.first.second));
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const SharedHandle<OptionHandler>& handler = find(pref);
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if(handler) {
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handler->parse(option, std::string(nv.second.first, nv.second.second));
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}
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}
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}
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void OptionParser::setOptionHandlers
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(const std::vector<SharedHandle<OptionHandler> >& handlers)
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{
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for(std::vector<SharedHandle<OptionHandler> >::const_iterator i =
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handlers.begin(), eoi = handlers.end(); i != eoi; ++i) {
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addOptionHandler(*i);
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}
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}
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void OptionParser::addOptionHandler(const SharedHandle<OptionHandler>& handler)
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{
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size_t optId = handler->getPref()->i;
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assert(optId < handlers_.size());
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handlers_[optId] = handler;
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if(handler->getShortName()) {
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shortOpts_[static_cast<unsigned char>(handler->getShortName())] = optId;
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}
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}
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void OptionParser::parseDefaultValues(Option& option) const
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{
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for(std::vector<SharedHandle<OptionHandler> >::const_iterator i =
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handlers_.begin(), eoi = handlers_.end(); i != eoi; ++i) {
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if(*i && !(*i)->getDefaultValue().empty()) {
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(*i)->parse(option, (*i)->getDefaultValue());
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}
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}
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}
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std::vector<SharedHandle<OptionHandler> >
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OptionParser::findByTag(uint32_t tag) const
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{
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std::vector<SharedHandle<OptionHandler> > result;
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for(std::vector<SharedHandle<OptionHandler> >::const_iterator i =
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handlers_.begin(), eoi = handlers_.end(); i != eoi; ++i) {
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if(*i && !(*i)->isHidden() && (*i)->hasTag(tag)) {
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result.push_back(*i);
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}
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}
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return result;
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}
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std::vector<SharedHandle<OptionHandler> >
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OptionParser::findByNameSubstring(const std::string& substring) const
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{
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std::vector<SharedHandle<OptionHandler> > result;
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for(std::vector<SharedHandle<OptionHandler> >::const_iterator i =
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handlers_.begin(), eoi = handlers_.end(); i != eoi; ++i) {
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if(*i && !(*i)->isHidden()) {
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size_t nameLen = strlen((*i)->getName());
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if(std::search((*i)->getName(), (*i)->getName()+nameLen,
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substring.begin(), substring.end()) !=
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(*i)->getName()+nameLen) {
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result.push_back(*i);
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}
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}
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}
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return result;
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}
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std::vector<SharedHandle<OptionHandler> > OptionParser::findAll() const
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{
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std::vector<SharedHandle<OptionHandler> > result;
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for(std::vector<SharedHandle<OptionHandler> >::const_iterator i =
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handlers_.begin(), eoi = handlers_.end(); i != eoi; ++i) {
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if(*i && !(*i)->isHidden()) {
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result.push_back(*i);
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}
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}
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return result;
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}
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const SharedHandle<OptionHandler>& OptionParser::find(const Pref* pref) const
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{
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return findById(pref->i);
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}
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const SharedHandle<OptionHandler>& OptionParser::findById(size_t id) const
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{
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if(id >= handlers_.size()) {
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return handlers_[0];
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}
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const SharedHandle<OptionHandler>& h = handlers_[id];
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if(!h || h->isHidden()) {
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return handlers_[0];
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} else {
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return h;
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}
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}
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const SharedHandle<OptionHandler>& OptionParser::findByShortName
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(char shortName) const
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{
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size_t idx = static_cast<unsigned char>(shortName);
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return findById(shortOpts_[idx]);
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}
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SharedHandle<OptionParser> OptionParser::optionParser_;
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const SharedHandle<OptionParser>& OptionParser::getInstance()
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{
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if(!optionParser_) {
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optionParser_.reset(new OptionParser());
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optionParser_->setOptionHandlers(OptionHandlerFactory::createOptionHandlers());
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}
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return optionParser_;
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}
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} // namespace aria2
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