Cmdline parser

parser.cpp

#include <iostream>
#include <string>
#include <sstream>
#include <vector>

using namespace std;

class Parser
{
private:
	char delimiter, quote, escape;

public:
	Parser(char _delimiter, char _quote, char _escape) :	
		delimiter(_delimiter),
		quote(_quote),
		escape(_escape)
	{}

	vector<string> parse(string command)
	{
		vector<string> tokens;
		stringstream token;
		bool escapeNext = false;
		bool quoteMode = false;
		for (string::iterator it = command.begin(); it != command.end(); ++it)
		{
			if (*it == escape && escapeNext == false && quoteMode == false)
			{
#ifdef DEBUG
				clog << "--- escaping next\n";
#endif
				escapeNext = true;
			} else if (*it == delimiter && escapeNext == false && quoteMode == false)
			{
#ifdef DEBUG
				clog << "--- delimiter\n";
#endif
				if (token.str().empty() == false)
				{
					tokens.push_back(token.str());
					token.str(string());
				}
			} else if (*it == quote && escapeNext == false)
			{
#ifdef DEBUG
				clog << "--- quoteMode = " << !quoteMode << "\n";
#endif
				quoteMode = !quoteMode;
			} else
			{
#ifdef DEBUG
				clog << "input: " << *it << " (escape: " << escapeNext << ", quote: " << quoteMode << ")\n";
#endif
				token << *it;
				escapeNext = false;
			}
		}
		if (token.str().empty() == false)
		{
			tokens.push_back(token.str());
		}
		return tokens;
	}
};

int main()
{
	string command;
	getline(cin, command);
	Parser parser(' ', '\"', '\\');
	auto tokens = parser.parse(command);
	for (auto it = tokens.begin(); it != tokens.end(); ++it)
	{
		cout << *it << "\n";
	}
	return 0;
}