From 57c57abcda5de8f2d2f715755db7530e318a9e62 Mon Sep 17 00:00:00 2001
From: SanJacobs
Date: Wed, 6 Apr 2022 22:48:33 +0200
Subject: Some progress

---
 src/time.cpp | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100755 src/time.cpp

(limited to 'src/time.cpp')

diff --git a/src/time.cpp b/src/time.cpp
new file mode 100755
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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