If-then-else is working with jump statements

source/interpreter.c

@@ -570,6 +570,42 @@ static bool execCompareLessEqual(Interpreter* interpreter, bool invert) {
 	return true;
 }
 
+static bool execJump(Interpreter* interpreter) {
+	int target = (int)readShort(interpreter->bytecode, &interpreter->count);
+
+	if (target >= interpreter->length) {
+		printf("Jump out of range\n");
+		return false;
+	}
+
+	//actually jump
+	interpreter->count = target + interpreter->codeStart;
+
+	return true;
+}
+
+static bool execFalseJump(Interpreter* interpreter) {
+	int target = (int)readShort(interpreter->bytecode, &interpreter->count);
+
+	if (target >= interpreter->length) {
+		printf("Jump out of range\n");
+		return false;
+	}
+
+	//actually jump
+	Literal lit = popLiteralArray(&interpreter->stack);
+
+	if (!parseIdentifierToValue(interpreter, &lit)) {
+		return false;
+	}
+
+	if (!IS_TRUTHY(lit)) {
+		interpreter->count = target + interpreter->codeStart;
+	}
+
+	return true;
+}
+
 //the heart of toy
 static void execInterpreter(Interpreter* interpreter) {
 	unsigned char opcode = readByte(interpreter->bytecode, &interpreter->count);
@@ -690,6 +726,18 @@ static void execInterpreter(Interpreter* interpreter) {
 				}
 			break;
 
+			case OP_JUMP:
+				if (!execJump(interpreter)) {
+					return;
+				}
+			break;
+
+			case OP_IF_FALSE_JUMP:
+				if (!execFalseJump(interpreter)) {
+					return;
+				}
+			break;
+
 			default:
 				printf("Unknown opcode found %d, terminating\n", opcode);
 				printLiteralArray(&interpreter->stack, "\n");
@@ -913,6 +961,9 @@ void runInterpreter(Interpreter* interpreter, unsigned char* bytecode, int lengt
 
 	consumeByte(OP_SECTION_END, interpreter->bytecode, &interpreter->count);
 
+	//set the starting point for the interpreter
+	interpreter->codeStart = interpreter->count;
+
 	//code section
 	if (command.verbose) {
 		printf(NOTICE "executing bytecode\n" RESET);