Function tokenizeCommandLine

Source/3rdParty/bx/src/commandline.cpp:14–140

Reference(s): - https://web.archive.org/web/20180629044234/https://msdn.microsoft.com/en-us/library/a1y7w461.aspx

	// - https://web.archive.org/web/20180629044234/https://msdn.microsoft.com/en-us/library/a1y7w461.aspx
	//
	StringView tokenizeCommandLine(const StringView& _commandLine, char* _buffer, uint32_t& _bufferSize, int32_t& _argc, char* _argv[], int32_t _maxArgvs, char _term)
	{
		int32_t argc = 0;
		const char* curr = _commandLine.getPtr();
		const char* end  = _commandLine.getTerm();
		char* currOut = _buffer;
		char term = ' ';
		bool sub = false;

		enum ParserState
		{
			SkipWhitespace,
			SetTerm,
			Copy,
			Escape,
			End,
		};

		ParserState state = SkipWhitespace;

		while (end != curr
		&&     _term != *curr
		&&     argc < _maxArgvs)
		{
			switch (state)
			{
				case SkipWhitespace:
					for (; isSpace(*curr) && *curr!=_term; ++curr) {}; // skip whitespace
					state = SetTerm;
					break;

				case SetTerm:
					if ('"' == *curr)
					{
						term = '"';
						++curr; // skip beginning quote
					}
					else
					{
						term = ' ';
					}

					_argv[argc] = currOut;
					++argc;

					state = Copy;
					break;

				case Copy:
					if ('\\' == *curr)
					{
						state = Escape;
					}
					else if ('"' == *curr
					     &&  '"' != term)
					{
						sub = !sub;
					}