struct dimensions {
	double pw; 	/* paper width */
	double ph;	/* paper height */
	double mw;	/* month width */
	double mh;	/* month height */
	double bw;	/* day box width */
	double bh;	/* day box height */
	double r;	/* rows */
	double c;	/* columns */
	double m;	/* margin */
};



int draw_calendar(cairo_t *c, double x, double y, struct dimensions d) {
	double x1, y1, x2, y2;
	x1 = x;
	y1 = y;
	x2 = d.pw - x1; /* Set the line endpoint to right side of the page */

	for (int i = 0; i < d.r + 1; i++) { /* Draw Horizontal Lines */
		cairo_move_to (c, x, y);
		cairo_line_to (c, x2, y);
		y = y + d.bh;
	}

	x = x1;
	y = y1;
	y2 = y1 + d.mh; /* Set the line endpoint as the bottom of the month */
	for (int i = 0; i < d.c + 1; i++) { /* Draw Vertical Lines */
		cairo_move_to (c, x, y);
		cairo_line_to (c, x, y2);
		x = x + d.bw;
	}
	cairo_stroke(c);
	return(0);
}



int draw_numbers(cairo_t *c, double x, double y, struct dimensions d, int wd, int nd) {
	char str[3];
	cairo_text_extents_t te;
	cairo_font_extents_t fe;

	cairo_select_font_face (c, "sans-serif",
			CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
	cairo_set_font_size (c, d.bw / 2);

	int iterative = 0;
	cairo_font_extents (c, &fe);
	double yi = y;
	double xi = x; 
	int current_weekday = wd;
	x = d.m + (wd * d.bw);
	for (int j = 0; j < d.r; j++) {
		y = y + d.bh - ((d.bh - fe.ascent) / 2);
		for (int k = current_weekday; k < d.c; k++) {
			if (iterative < nd) {
				sprintf(str, "%d", iterative + 1);
				cairo_text_extents (c, str, &te);
				double box_margins = (d.bw - te.width) / 2;

				cairo_move_to(c, x + box_margins - te.x_bearing, y); /* center the number within the box */
				cairo_show_text(c, str);
				cairo_move_to(c, x, y); /* Sort of backtrack to realign with the spacing of the boxes */
				x = x + d.bw;
				iterative++;
				current_weekday++;
			}
		}
		current_weekday = 0;
		y = y - (d.bh - ((d.bh - fe.ascent) / 2));
		y = y + d.bh;
		x = xi;
	}
	return(0);
}



int draw_month_name(cairo_t *c, char *name, struct dimensions d) {
	double x, y = d.m;
	cairo_set_font_size(c, 1.0);
	cairo_text_extents_t te;
	cairo_font_extents_t fe;
	cairo_text_extents(c, name, &te);
	x = (d.pw / 2) - (te.width / 2);
	y = 1.5;
	cairo_move_to(c, x, y);
	cairo_show_text(c, &name[0]);
	return(0);
}