/*
 * aclock - ascii clock for UNIX Console
 *
 * Copyright (c) 2002 Antoni Sawicki <tenox@tenox.tc>
 * Version 1.8 (unix-curses); Dublin, June 2002
 *
 * Compilation: cc aclock-unix-knr.c -o aclock -lcurses -lm
 *
 * this is K&R version modified for old unices (but still with curses)
 *
 */

#include <unistd.h>
#include <curses.h>
#include <math.h>
#include <time.h>

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

drw_cir(hand_max, sycen, sxcen, fonthw)
int hand_max; int sycen; int sxcen; int fonthw;
{
	int x,y,r;
	char c;

	for(r=0;r<60;r++){
		x=cos(r*M_PI/180*6)*hand_max*fonthw+sxcen;
		y=sin(r*M_PI/180*6)*hand_max+sycen;
		switch (r) {
			case 0:
			case 5:
			case 10:
			case 15:
			case 20:
			case 25:
			case 30:
			case 35:
			case 40:
			case 45:
			case 50:
			case 55:
				c='o';
				break;
			default:
				c='.';
				break;
		}
		mvaddch(y,x,c);
	}
}

draw_hand(minute, hlenght, c, sxcen, sycen, fonthw)
int minute; int hlenght; char c; int sxcen; int sycen; int fonthw;
{
	int x,y,n;
	float r=(minute-15)*(M_PI/180)*6;

	for(n=1; n<hlenght; n++){
		x=cos(r)*n*fonthw+sxcen;
		y=sin(r)*n+sycen;
		mvaddch(y,x,c);
	}
}


main(){
	char digital_time[15];
	int fonthw = 2;
	int sXmax, sYmax, smax, hand_max, sxcen, sycen;
	long t;
	struct tm *ltime;

	initscr();

	for(;;){
		time(&t);
		ltime=localtime(&t);
		sXmax = COLS;
		sYmax = LINES;

		if(sXmax/2<=sYmax)
			smax=sXmax/2;
		else
			smax=sYmax;

		hand_max = (smax/2)-1;

		sxcen = sXmax/2;
		sycen = sYmax/2;

		erase();
		drw_cir(hand_max, sycen, sxcen, fonthw);

		draw_hand((ltime->tm_hour*5)+(ltime->tm_min/10), 2*hand_max/3, 'h', sxcen, sycen, fonthw);
		draw_hand(ltime->tm_min, hand_max-2, 'm', sxcen, sycen, fonthw);
		draw_hand(ltime->tm_sec, hand_max-1, '.', sxcen, sycen, fonthw);

		mvaddstr(sYmax/4, sxcen-5, ".:ACLOCK:.");
		mvprintw(4*sYmax/5, sxcen-5, "[%02d:%02d:%02d]", ltime->tm_hour, ltime->tm_min, ltime->tm_sec);

		refresh();
		sleep(1);
	}
	endwin();
}