rough ncurses main

1 files changed, 197 insertions, 0 deletions

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..e90a92b
--- /dev/null
+++ b/main.c
@@ -0,0 +1,197 @@
+#include <ncurses.h>
+#include <form.h>
+#include <signal.h>
+#include "contract.h"
+#include "loans.h"
+
+static int WIDTH, HEIGHT;
+static int padscroll, duration;
+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 *);
+
+int main() {
+	int ch, i;
+
+	/* setup ncurses */
+	signal(SIGINT, finish); /* arrange interrupts to terminate */
+	initscr(); /* initialize the curses library */
+	cbreak(); /* take input chars one at a time don't wait for CR */
+	noecho(); /* echo input */
+	nonl(); /* do not LF->CR-LF on output */
+	intrflush(stdscr, FALSE); /* do not flush on interrupts */
+	keypad(stdscr, TRUE); /* enable keyboard mapping */
+	getmaxyx(stdscr, HEIGHT, WIDTH);
+
+	/* create the form */
+	FIELD *fields[8];
+	FORM *form;
+	char *contract_types[] = { "loan", "savings", NULL };
+	char *contract_subtypes[] = { "bullet", "sla", "mort", NULL };
+
+	/* initialize fields */
+	fields[0] = new_field(1, 11, 4, 22, 0, 0); /* contract type */
+	set_field_type(fields[0], TYPE_ENUM, contract_types, FALSE, TRUE);
+	fields[1] = new_field(1, 11, 5, 22, 0, 0); /* contract subtype */
+	set_field_type(fields[1], TYPE_ENUM, contract_subtypes, FALSE, TRUE);
+	fields[2] = new_field(1, 11, 6, 22, 0, 0); /* contract duration */
+	set_field_type(fields[2], TYPE_INTEGER, 1, 0, INT_MAX);
+	fields[3] = new_field(1, 11, 7, 22, 0, 0); /* yearly payments */
+	set_field_type(fields[3], TYPE_INTEGER, 1, 0, INT_MAX);
+	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);
+	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;
+
+	/* configure fields */
+	for (i = 0; fields[i]; i++) {
+		set_field_back(fields[i], A_UNDERLINE); 	/* Print a line for the option 	*/
+		field_opts_off(fields[i], O_AUTOSKIP);  	/* Don't go to next field when this */
+	                                                /* Field is filled up 		*/
+	}
+
+	/* create form */
+	form = new_form(fields);
+	display_custom_form(form);
+	refresh();
+
+	int formactive = TRUE;
+	/* mainloop */
+	while ((ch = getch()) != KEY_EXIT) {
+        if (formactive) {
+            switch (ch) {
+            case KEY_DOWN:
+                /* Go to next field */
+                form_driver(form, REQ_NEXT_FIELD);
+                /* Go to the end of the present buffer */
+                /* Leaves nicely at the last character */
+                form_driver(form, REQ_END_LINE);
+                break;
+            case KEY_UP:
+				form_driver(form, REQ_PREV_FIELD);
+				form_driver(form, REQ_END_LINE);
+                break;
+            case KEY_LEFT:
+                form_driver(form, REQ_PREV_CHOICE);
+                break;
+            case KEY_RIGHT:
+                form_driver(form, REQ_NEXT_CHOICE);
+                break;
+            case KEY_BACKSPACE:
+                form_driver(form, REQ_DEL_PREV);
+                break;
+            case '\r':
+				unpost_form(form);
+				formactive = FALSE;
+				curs_set(0);
+                refresh();
+                box(stdscr, 0, 0);
+				run_sim(form);
+				padscroll = 0;
+				prefresh(pad, padscroll, 0, 4, 1, HEIGHT-2, WIDTH-1);
+                break;
+            default:
+                /* If this is a normal character, it gets */
+                /* Printed				  */	
+                form_driver(form, ch);
+            }
+        } else {
+            switch (ch) {
+            case KEY_DOWN:
+				padscroll += (padscroll < duration) ? 1 : 0;
+				pnoutrefresh(pad, padscroll, 0, 4, 1, HEIGHT-2, WIDTH-1);
+                doupdate();
+                break;
+            case KEY_UP:
+				padscroll -= (padscroll > 0) ? 1 : 0;
+				pnoutrefresh(pad, padscroll, 0, 4, 1, HEIGHT-2, WIDTH-1);
+                doupdate();
+                break;
+            case 'q':
+				display_custom_form(form);
+				formactive = TRUE;
+				curs_set(1);
+                break;
+            }
+        }
+	}
+
+	delwin(pad);
+	if (formactive) unpost_form(form);
+	free_form(form);
+	for (i = 0; fields[i]; i++)
+		free_field(fields[i]);
+
+	finish(0);
+}
+
+_Noreturn static void finish (int sig) {
+	endwin();
+
+	exit(sig);
+}
+
+void display_custom_form(FORM *form) {
+	post_form(form);
+	mvprintw(2, 5, "Initialization Parameters");
+	mvprintw(4, 2, "Contract type:");
+	mvprintw(5, 2, "Contract subtype:");
+	mvprintw(6, 2, "Contract Duration:");
+	mvprintw(7, 2, "Yearly payments:");
+	mvprintw(8, 2, "Delay Duration:");
+	mvprintw(9, 2, "Starting Amount:");
+	mvprintw(10, 2, "Rate:");
+	form_driver(form, REQ_FIRST_FIELD);	
+}
+
+void print_contract(WINDOW* w, int x, int y, contract *c) {
+	mvwprintw(w, x, y,
+			 "%4d/%-4d | %12.2f | %10.2f | %10.2f | %10.2f\n",
+			 c->k, c->n,
+			 (double)c->P, (double)c->I,
+			 (double)c->D, (double)c->A);
+}
+
+void run_sim(FORM *form) {
+	/* loan_type type; */
+	int n, d, yp;
+	double r, p;
+
+	FIELD **fields = form_fields(form);
+	n = atoi(field_buffer(fields[2], 0));
+	yp = atoi(field_buffer(fields[3], 0));
+	d = atoi(field_buffer(fields[4], 0));
+	p = atof(field_buffer(fields[5], 0));
+	r = atof(field_buffer(fields[6], 0));
+
+	//adapt wrt yearly payments
+	if (yp > 1) {
+		n = n*yp;
+		d = d*yp;
+		r = r/(double)yp;
+	}
+
+	/* setup pad */
+	pad = newpad(n+1, WIDTH-2);
+	mvwprintw(stdscr, 1, 2, "Reinbursement Table");
+	mvwprintw(stdscr, 3, 3,
+			 "%4s/%-4s | %12s | %10s | %10s | %10s\n",
+             "cur", "tot",
+             "principal",
+             "interest",
+             "part",
+             "annuity");
+
+	/* run simulation */
+	loan l = loan_init(MORTGAGE, 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;
+}