Function Script_CreateDummy

src/script/script_info_dummy.cpp:81–112

Run the dummy AI and let it generate an error message. */

/** Run the dummy AI and let it generate an error message. */
void Script_CreateDummy(HSQUIRRELVM vm, StringID string, std::string_view type)
{
	/* We want to translate the error message.
	 * We do this in three steps:
	 * 1) We get the error message, escape quotes and slashes, and split on
	 *    newlines because Log.Error terminates passed strings at newlines.
	 */
	std::string error_message = GetString(string);
	std::vector<std::string> messages = EscapeQuotesAndSlashesAndSplitOnNewLines(error_message);

	/* 2) We construct the AI's code. This is done by merging a header, body and footer */
	std::string dummy_script;
	/* Just a rough ballpark estimate. */
	dummy_script.reserve(error_message.size() + 128 + 64 * messages.size());

	format_append(dummy_script, "class Dummy{0} extends {0}Controller {{\n  function Start()\n  {{\n", type);
	for (std::string &message : messages) {
		format_append(dummy_script, "    {}Log.Error(\"{}\");\n", type, message);
	}
	dummy_script += "  }\n}\n";

	/* 3) Finally we load and run the script */
	sq_pushroottable(vm);
	if (SQ_SUCCEEDED(sq_compilebuffer(vm, dummy_script, "dummy", SQTrue))) {
		sq_push(vm, -2);
		if (SQ_SUCCEEDED(sq_call(vm, 1, SQFalse, SQTrue))) {
			sq_pop(vm, 1);
			return;
		}
	}
	NOT_REACHED();
}