From f2fb044281983cd6806f84dda56ebc26655b6ee1 Mon Sep 17 00:00:00 2001
From: San Jacobs
Date: Sun, 3 Apr 2022 14:40:19 +0200
Subject: Progress made on C++ version

---
 src/time.cpp | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 src/time.cpp

(limited to 'src/time.cpp')

diff --git a/src/time.cpp b/src/time.cpp
new file mode 100644
index 0000000..3b65ccc
--- /dev/null
+++ b/src/time.cpp
@@ -0,0 +1,101 @@
+#include "time.h"
+
+// Look. listen here. There's no way I'm going to start taking DST into account.
+// I have to draw the line somewhere, and frankly, once you start doing "Change an hour on the 4th moon of the 2nd week of March in France, but only if the tulips haven't sprung... etc... etc.." I'm out.
+// Just do it on a set day, God dammit.
+
+timeblock timesplit(timeblock &input_block, moment splitpoint) {
+	timeblock output{splitpoint, input_block.end};
+	input_block.end = splitpoint;
+	return output;
+}
+
+void wind(moment &input_moment, int minutes, int hours, int days) {
+	
+	// Adding minutes
+	input_moment.minutes += minutes;
+	while(input_moment.minutes > 59) {
+		input_moment.minutes -= 60;
+		input_moment.hours++;
+	}
+	while(input_moment.minutes < 0) {
+		input_moment.minutes += 60;
+		input_moment.hours--;
+	}
+	
+	// Adding hours
+	input_moment.hours += hours;
+	while(input_moment.hours > 23) {
+		input_moment.hours -= 24;
+		input_moment.day++;
+	}
+	while(input_moment.hours < 0) {
+		input_moment.hours += 24;
+		input_moment.day--;
+	}
+	
+	// Adding days
+	input_moment.day += days;
+	// FIXME: Months don't roll over.'The -3th of January will cause problems.
+	//											  ^^^^^^^
+	// Fixing this will just take some simple modulo math.
+	int current_month_length = days_in(input_moment.month, input_moment.year);
+	while(input_moment.day > current_month_length) {
+		input_moment.day -= current_month_length;
+		input_moment.month++;
+		current_month_length = days_in(input_moment.month, input_moment.year);
+	while(input_moment.day < 1) {
+		input_moment.day += days_in(((input_moment.month-1)%12)+1); // FIXME, this is absolutely retarded at the moment
+		input_moment.month++;
+		current_month_length = days_in(input_moment.month, input_moment.year);
+	}
+}
+
+std::string timeprint(moment input_moment) {
+	using namespace std;
+	// TODO: Add leading zeroes to hours and minutes
+	string output =
+		to_string(input_moment.hours) + ":"
+		+ to_string(input_moment.minutes) + " "
+		+ to_string(input_moment.year) + "-"
+		+ to_string(input_moment.month) + "-"
+		+ to_string(input_moment.day);
+	return output;
+}
+
+int days_in(int month, int year) {
+	// Kind of a stupid and slow way to do this
+	// But it's nice to have it as a function
+	// because of the leap year arithmatic
+	switch (month) {
+		case 1:
+			return 31;
+		case 2:
+			if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)){
+				return 29;
+			}
+			return 28;
+		case 3:
+			return 31;
+		case 4:
+			return 30;
+		case 5:
+			return 31;
+		case 6:
+			return 30;
+		case 7:
+			return 31;
+		case 8:
+			return 31;
+		case 9:
+			return 30;
+		case 10:
+			return 31;
+		case 11:
+			return 30;
+		case 12:
+			return 31;
+	}
+	std::cout << "Something just went very wrong. You found month #" << std::to_string(month) << '\n';
+	return 5;
+}
-- 
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