1.1 --- a/actions.c	Sun Mar 02 13:35:42 2008 +0100
     1.2 +++ b/actions.c	Sun Mar 02 15:54:35 2008 +0100
     1.3 @@ -8,6 +8,8 @@
     1.4  unsigned char action_number(struct Node* node);
     1.5  unsigned char action_input(struct Node* node);
     1.6  unsigned char action_times(struct Node* node);
     1.7 +unsigned char action_if(struct Node* node);
     1.8 +unsigned char action_while(struct Node* node);
     1.9  
    1.10  
    1.11  
    1.12 @@ -34,6 +36,12 @@
    1.13  	} else if (strcmp(node->name, "times") == 0) {
    1.14  		return action_times(node);
    1.15  
    1.16 +	} else if (strcmp(node->name, "if") == 0) {
    1.17 +		return action_if(node);
    1.18 +
    1.19 +	} else if (strcmp(node->name, "while") == 0) {
    1.20 +		return action_while(node);
    1.21 +
    1.22  	} else {
    1.23  		fprintf(stderr, "unknown kind of node\n");
    1.24  		exit(4);
    1.25 @@ -90,3 +98,49 @@
    1.26  	}
    1.27  	return 0;
    1.28  }
    1.29 +
    1.30 +
    1.31 +unsigned char action_if(struct Node* node) {
    1.32 +	int result = 0;
    1.33 +	char return1;
    1.34 +	char return2;
    1.35 +
    1.36 +	if (node->down == NULL || node->down->right == NULL) {
    1.37 +		fprintf(stderr, "error: while requires two sons");
    1.38 +		exit(1); /* FIXME other error code */
    1.39 +	}
    1.40 +
    1.41 +	return1 = action(node->down);
    1.42 +	return2 = action(node->down->right);
    1.43 +
    1.44 +	if (node->value == '!') { /* 33 */
    1.45 +		if (return1 != return2) {
    1.46 +			result = 1;
    1.47 +		}
    1.48 +	} else if (node->value == '<') { /* 60 */
    1.49 +		if (return1 < return2) {
    1.50 +			result = 1;
    1.51 +		}
    1.52 +	} else if (node->value == '>') { /* 62 */
    1.53 +		if (return1 > return2) {
    1.54 +			result = 1;
    1.55 +		}
    1.56 +	} else {
    1.57 +		if (return1 == return2) {
    1.58 +			result = 1;
    1.59 +		}
    1.60 +	}
    1.61 +	return result;
    1.62 +}
    1.63 +
    1.64 +
    1.65 +unsigned char action_while(struct Node* node) {
    1.66 +	if (node->down == NULL || node->down->right == NULL) {
    1.67 +		fprintf(stderr, "error: while requires two sons");
    1.68 +		exit(1); /* FIXME other error code */
    1.69 +	}
    1.70 +	while (action(node->down)) {
    1.71 +		action(node->down->right);
    1.72 +	}
    1.73 +	return 0;
    1.74 +}