check that values exist before running sim

1 files changed, 17 insertions, 14 deletions

diff --git a/main.c b/main.c
index 5a73850..58b2b4a 100644
--- a/main.c
+++ b/main.c
@@ -10,7 +10,7 @@ static WINDOW *pad;
 _Noreturn static void finish(int sig);
 void display_custom_form(FORM *);
 void print_contract(WINDOW *w, int x, int y, contract *c);
-void run_sim(FORM *, char **contract_subtypes);
+int run_sim(FORM *, char **contract_subtypes);
 
 int main() {
 	int ch, i;
@@ -43,7 +43,7 @@ int main() {
 	fields[4] = new_field(1, 11, 8, 22, 0, 0); /* delay duration */
 	set_field_type(fields[4], TYPE_INTEGER, 1, 0, INT_MAX);
 	fields[5] = new_field(1, 11, 9, 22, 0, 0); /* starting amount */
-	set_field_type(fields[5], TYPE_NUMERIC, 2, 0.0, 0.0);
+	set_field_type(fields[5], TYPE_NUMERIC, 2, 0.01, 0.0);
 	fields[6] = new_field(1, 11, 10, 22, 0, 0); /* rate */
 	set_field_type(fields[6], TYPE_NUMERIC, 3, 0.0, 1.0);
 	fields[7] = NULL;
@@ -86,13 +86,21 @@ int main() {
 				form_driver(form, REQ_DEL_PREV);
 				break;
 			case '\r':
-				if (E_OK == form_driver(form, REQ_VALIDATION)) {
+				if ((E_OK == form_driver(form, REQ_VALIDATION))
+					&& run_sim(form, contract_subtypes)) {
 					unpost_form(form);
 					formactive = FALSE;
 					curs_set(0);
 					box(stdscr, 0, 0);
-					run_sim(form, contract_subtypes);
 					padscroll = 0;
+					mvwprintw(stdscr, 1, 2, "Reinbursement Table");
+					mvwprintw(stdscr, 3, 3,
+							  "%4s/%-4s | %12s | %10s | %10s | %10s\n",
+							  "cur", "tot",
+							  "principal",
+							  "interest",
+							  "part",
+							  "annuity");
 					refresh();
 					prefresh(pad, padscroll, 0, 4, 1, HEIGHT-2, WIDTH-1);
 				}
@@ -159,7 +167,7 @@ void print_contract(WINDOW* w, int x, int y, contract *c) {
 			 (double)c->D, (double)c->A);
 }
 
-void run_sim(FORM *form, char **contract_subtypes) {
+int run_sim(FORM *form, char **contract_subtypes) {
 	/* loan_type type; */
 	int n, d, yp;
 	double r, p;
@@ -173,6 +181,8 @@ void run_sim(FORM *form, char **contract_subtypes) {
 	p = atof(field_buffer(fields[5], 0));
 	r = atof(field_buffer(fields[6], 0));
 
+	if (!n || !yp || (p <= 0.0)) return 0;
+
 	//adapt wrt yearly payments
 	if (yp > 1) {
 		n = n*yp;
@@ -182,21 +192,14 @@ void run_sim(FORM *form, char **contract_subtypes) {
 
 	/* setup pad */
 	pad = newpad(n+1, WIDTH-2);
-	mvwprintw(stdscr, 1, 2, "Reinbursement Table for %s", contract_subtypes[lt]);
-	mvwprintw(stdscr, 3, 3,
-			 "%4s/%-4s | %12s | %10s | %10s | %10s\n",
-			 "cur", "tot",
-			 "principal",
-			 "interest",
-			 "part",
-			 "annuity");
 
 	/* run simulation */
-	printf("%d\n", (int)lt);
 	loan l = loan_init(lt, n, d, r, p);
 	for (int i = 0; i <= n; i++) {
 		print_contract(pad, i, 2, l.c);
 		loan_update(l);
 	}
 	duration = n - HEIGHT + 6;
+
+	return 1;
 }