From 4b18819e5f34358cab1bf1c1514d443421d7968c Mon Sep 17 00:00:00 2001
From: foswret <foswret@posteo.com>
Date: Fri, 12 Dec 2025 15:13:48 -0600
Subject: All months are now able to be generated correctly in one PDF.
 Therefore, all absolutely core functionality is done.

---
 src/calp.c | 106 ++++++++++++++++++++++++++++++++-----------------------------
 src/calp.o | Bin 13272 -> 14008 bytes
 src/date.c |   4 +++
 src/date.h |   2 ++
 src/date.o | Bin 0 -> 3112 bytes
 5 files changed, 61 insertions(+), 51 deletions(-)
 create mode 100644 src/date.c
 create mode 100644 src/date.o

(limited to 'src')

diff --git a/src/calp.c b/src/calp.c
index 278538e..d18498d 100644
--- a/src/calp.c
+++ b/src/calp.c
@@ -18,11 +18,12 @@
 
 // int main (int argc, char *argv[]) {
 int main (void) {
-	/* Dimension initialization */
-	int rows = 6;			/* Number of weeks in a month */
-	int columns = 7;		/* Number of days in a week */
-	double margin = 0.5; 		/* 0.5" */
-	int number_of_days = 28;
+	// Dimension initialization
+	int rows = 6;			// Number of weeks in a month 
+	int columns = 7;		// Number of days in a week 
+	int months_in_year = 12;
+	double margin = 0.5; 		// 0.5" 
+	//int number_of_days = 28;
 
 	double month_origin_x = margin;
 	double month_origin_y = 3.0;
@@ -34,69 +35,72 @@ int main (void) {
 	double day_box_height = month_height / rows;
 
 	struct dimensions dim = {
-		paper_width, 	/* pw */
-		paper_height,	/* ph */
-		month_width,	/* mw */
-		month_height, 	/* mh */
-		day_box_width,	/* bw */
-		day_box_height,	/* bh */
-		rows,		/* r  */
-		columns,	/* c  */
-		margin,		/* m  */
+		paper_width, 	// pw
+		paper_height,	// ph
+		month_width,	// mw
+		month_height, 	// mh
+		day_box_width,	// bw
+		day_box_height,	// bh
+		rows,		// r 
+		columns,	// c 
+		margin,		// m 
 	};
 
-	/* Date Setup */
+	// Date Setup
 		char *months[] = {
 		"January", "February", "March", "April", "May",
 		"June", "July", "August", "September", "October",
 		"November", "December"
 	};
 
-	//int days_in_month[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+	// If year is a leap year, isleap(year) = 1, and will be added to February.
+	int year = 2028;
+	int days_in_month[12] = {31, 28 + isleap(year), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
 	
-	// const char *weekday_names[] = {
-	// 	"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
-	// };
-
-	// const char *weekdays_abbr[] = {
-	// 	"Su", "Mo", "Tue", "Wed", "Thurs", "Fri", "Sat"
-	// };
-
-	int year = 2025;
-	int month = 2;
-
-	struct tm day;
-	day.tm_mon = month - 1;
-	day.tm_mday = 1;
-	day.tm_year = year - 1900;
-
-	/* tm.hour, tm_min, & tm_sec are not used, but need to be zeroed. */
-	day.tm_hour = 0;
-	day.tm_min = 0;			
-	day.tm_sec = 0;
-
-	mktime(&day);
-
-	cairo_surface_t * surface = cairo_pdf_surface_create("0.pdf", dim.pw * 72, dim.ph * 72);
+	
+	// Because 1px = 1/72", paper width & paper height must be multiplied by 72
+	cairo_surface_t * surface = cairo_pdf_surface_create("output.pdf", dim.pw * 72, dim.ph * 72);
 	cairo_t *cr = cairo_create(surface);
 
 
+	// Once paper dimensions have been initialized, they can be scaled back by the same factor they
+	// were multiplied to make the dimensions are easier to work with.
 	cairo_scale(cr, 72, 72);
-	set_color(cr, "GRAY");
 	cairo_set_line_width (cr, 0.03);
 
 
-	clock_t begin = clock();
-	draw_calendar(cr, month_origin_x, month_origin_y, dim);
-	draw_numbers(cr, month_origin_x, month_origin_y, dim, day.tm_wday, number_of_days);
-	draw_month_name(cr, months[1], dim);
-
-	/* Clean Up */
+	struct tm day;
+	static const struct tm empty_day;
+	
+	
+	// For some reason, this loop requires a zeroing of the day struct & running mktime() twice.
+	// Or else, the January and December days will be offset by +1/-1. I assume this is a 
+	// quirk of time.h.
+	for (int i = 0; i < months_in_year; i++) {
+		mktime(&day);
+		day.tm_year = year - 1900;
+		day.tm_mon = i;
+		day.tm_mday = 1;
+
+		// tm.hour, tm_min, & tm_sec are not used, but need to be zeroed. 
+		day.tm_hour = 0;
+		day.tm_min = 0;			
+		day.tm_sec = 0;
+
+		mktime(&day);
+
+		draw_calendar(cr, month_origin_x, month_origin_y, dim);
+		draw_numbers(cr, month_origin_x, month_origin_y, dim, (day.tm_wday), days_in_month[i]);
+		draw_month_name(cr, months[i], dim);
+
+		day = empty_day;
+		
+// Moves to the next page of the pdf
+		cairo_show_page(cr); 
+	}
+
+	// Clean Up 
 	cairo_destroy(cr);
 	cairo_surface_destroy(surface);
-
-	clock_t end = clock();
-	double time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
-	printf("Execution Time: %.3fs\n", time_spent);
 	return(0);
 }
diff --git a/src/calp.o b/src/calp.o
index 23e90f5..19c2195 100644
Binary files a/src/calp.o and b/src/calp.o differ
diff --git a/src/date.c b/src/date.c
new file mode 100644
index 0000000..48642dd
--- /dev/null
+++ b/src/date.c
@@ -0,0 +1,4 @@
+int isleap(int year)
+{
+    return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
+}
diff --git a/src/date.h b/src/date.h
index 4ff3d32..becc5a2 100644
--- a/src/date.h
+++ b/src/date.h
@@ -1 +1,3 @@
 /* date.h: Includes all the functions relating to calculating months, days, etc. */
+
+int isleap(int year);
diff --git a/src/date.o b/src/date.o
new file mode 100644
index 0000000..bc27b4b
Binary files /dev/null and b/src/date.o differ
-- 
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