Function IConsoleCmdExec

src/console.cpp:269–365

* Execute a given command passed to us. First chop it up into * individual tokens (separated by spaces), then execute it if possible * @param command_string string to be parsed and executed */

 * @param command_string string to be parsed and executed
 */
void IConsoleCmdExec(std::string_view command_string, const uint recurse_count)
{
	if (command_string[0] == '#') return; // comments

	Debug(console, 4, "Executing cmdline: '{}'", command_string);

	std::string buffer;
	StringBuilder builder{buffer};
	StringConsumer consumer{command_string};

	std::vector<std::string> tokens;
	bool found_token = false;
	bool in_quotes = false;

	/* 1. Split up commandline into tokens, separated by spaces, commands
	 * enclosed in "" are taken as one token. We can only go as far as the amount
	 * of characters in our stream or the max amount of tokens we can handle */
	while (consumer.AnyBytesLeft()) {
		auto c = consumer.TryReadUtf8();
		if (!c.has_value()) {
			IConsolePrint(CC_ERROR, "Command '{}' contains malformed characters.", command_string);
			return;
		}

		switch (*c) {
			case ' ': // Token separator
				if (!found_token) break;

				if (in_quotes) {
					builder.PutUtf8(*c);
					break;
				}

				tokens.emplace_back(std::move(buffer));
				buffer.clear();
				found_token = false;
				break;

			case '"': // Tokens enclosed in "" are one token
				in_quotes = !in_quotes;
				found_token = true;
				break;

			case '\\': // Escape character for ""
				if (consumer.ReadUtf8If('"')) {
					builder.PutUtf8('"');
					break;
				}
				[[fallthrough]];

			default: // Normal character
				builder.PutUtf8(*c);
				found_token = true;
				break;
		}
	}

	if (found_token) {