--- a/actions.c	Sun Mar 02 13:35:42 2008 +0100
+++ b/actions.c	Sun Mar 02 15:54:35 2008 +0100
@@ -8,6 +8,8 @@
 unsigned char action_number(struct Node* node);
 unsigned char action_input(struct Node* node);
 unsigned char action_times(struct Node* node);
+unsigned char action_if(struct Node* node);
+unsigned char action_while(struct Node* node);
 
 
 
@@ -34,6 +36,12 @@
 	} else if (strcmp(node->name, "times") == 0) {
 		return action_times(node);
 
+	} else if (strcmp(node->name, "if") == 0) {
+		return action_if(node);
+
+	} else if (strcmp(node->name, "while") == 0) {
+		return action_while(node);
+
 	} else {
 		fprintf(stderr, "unknown kind of node\n");
 		exit(4);
@@ -90,3 +98,49 @@
 	}
 	return 0;
 }
+
+
+unsigned char action_if(struct Node* node) {
+	int result = 0;
+	char return1;
+	char return2;
+
+	if (node->down == NULL || node->down->right == NULL) {
+		fprintf(stderr, "error: while requires two sons");
+		exit(1); /* FIXME other error code */
+	}
+
+	return1 = action(node->down);
+	return2 = action(node->down->right);
+
+	if (node->value == '!') { /* 33 */
+		if (return1 != return2) {
+			result = 1;
+		}
+	} else if (node->value == '<') { /* 60 */
+		if (return1 < return2) {
+			result = 1;
+		}
+	} else if (node->value == '>') { /* 62 */
+		if (return1 > return2) {
+			result = 1;
+		}
+	} else {
+		if (return1 == return2) {
+			result = 1;
+		}
+	}
+	return result;
+}
+
+
+unsigned char action_while(struct Node* node) {
+	if (node->down == NULL || node->down->right == NULL) {
+		fprintf(stderr, "error: while requires two sons");
+		exit(1); /* FIXME other error code */
+	}
+	while (action(node->down)) {
+		action(node->down->right);
+	}
+	return 0;
+}