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// This file is part of CommandLine, a C++ argument processing class.
//
// Copyright 2003 Tom Felker <tcfelker@mtco.com>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation; either version 2.1 of
// the License, or (at your option) any later version.
//
// This 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// commandline.cpp
// defines the CommandLine class
#include <iostream>
#include <string>
#include <stdexcept>
#include <assert.h>
#include "commandline.h"
using namespace std;
// argv is a pointer to a const pointer to a const char
CommandLine::CommandLine(int argc, const char * const * argv)
{
if(argc < 1) throw out_of_range("CommandLine::CommandLine(): argc < 1");
for(int i = argc - 1; i > 0; --i) args.push(argv[i]);
in_short = false;
cur_is_arg = false;
no_more_options = false;
program_name = argv[0];
}
string CommandLine::GetOption()
{
if(no_more_options || args.empty()) return "";
if(cur_is_arg) {
cerr << "ignoring an argument" << endl;
args.pop();
if(args.empty()) return "";
}
while(true) {
if(args.top().empty()) {
args.pop();
if(args.empty()) return "";
in_short = false;
} else {
break;
}
}
if(in_short) {
string retval(args.top().substr(0, 1));
args.top().erase(0, 1);
return retval;
}
if(args.top() == "--") {
no_more_options = true;
args.pop();
return "";
}
if(args.top().substr(0,2) == "--") {
args.top().erase(0, 2);
size_t eq_pos = args.top().find("=");
string retval(args.top().substr(0, eq_pos));
args.top().erase(0, eq_pos);
if(args.top().empty()) {
args.pop();
} else {
args.top().erase(0, 1);
cur_is_arg = true;
}
return retval;
}
if(args.top() == "-") return "";
if(args.top().substr(0, 1) == "-") {
args.top().erase(0, 1);
in_short = true;
string retval(args.top().substr(0, 1));
args.top().erase(0, 1);
if(args.top().empty()) args.pop();
return retval;
}
return "";
}
string CommandLine::GetArgument()
{
if(args.empty()) return "";
string retval = args.top();
if(!cur_is_arg && retval == "--") {
args.pop();
if(args.empty()) return "";
retval = args.top();
}
args.pop();
cur_is_arg = false;
in_short = false;
return retval;
}
string CommandLine::GetProgramName()
{
return program_name;
}
bool CommandLine::End() const {
return args.empty();
}
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