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date.zig tweaks

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This commit is contained in:
Emil Lerch 2022-01-17 18:52:27 -08:00
parent 8d36300f27
commit 9880aa0ba9
Signed by: lobo
GPG Key ID: A7B62D657EF764F8
1 changed files with 8 additions and 6 deletions
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14
src/date.zig
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@ -6,7 +6,7 @@ const std = @import("std");
pub const DateTime = struct { day: u8, month: u8, year: u16, hour: u8, minute: u8, second: u8 };
pub fn timestamp2DateTime(timestamp: i64) DateTime {
pub fn timestampToDateTime(timestamp: i64) DateTime {
// aus https://de.wikipedia.org/wiki/Unixzeit
const unixtime = @intCast(u64, timestamp);
@ -32,7 +32,7 @@ pub fn timestamp2DateTime(timestamp: i64) DateTime {
year += @intCast(u16, temp);
dayN -= DAYS_PER_YEAR * temp + temp / 4;
// TagN calculates the days of the year in relation to March 1
// dayN calculates the days of the year in relation to March 1
var month = @intCast(u8, (5 * dayN + 2) / 153);
var day = @intCast(u8, dayN - (@intCast(u64, month) * 153 + 2) / 5 + 1);
// 153 = 31+30+31+30+31 Days for the 5 months from March through July
@ -66,14 +66,16 @@ pub fn printDateTime(dt: DateTime) void {
}
pub fn printNowUtc() void {
printDateTime(timestamp2DateTime(std.time.timestamp()));
printDateTime(timestampToDateTime(std.time.timestamp()));
}
test "GMT and localtime" {
std.testing.log_level = .debug;
std.log.debug("\n", .{});
printDateTime(timestamp2DateTime(std.time.timestamp()));
try std.testing.expectEqual(DateTime{ .year = 2020, .month = 8, .day = 28, .hour = 9, .minute = 32, .second = 27 }, timestamp2DateTime(1598607147));
printDateTime(timestampToDateTime(std.time.timestamp()));
try std.testing.expectEqual(DateTime{ .year = 2020, .month = 8, .day = 28, .hour = 9, .minute = 32, .second = 27 }, timestampToDateTime(1598607147));
try std.testing.expectEqual(DateTime{ .year = 2020, .month = 11, .day = 1, .hour = 5, .minute = 6, .second = 7 }, timestamp2DateTime(1604207167));
try std.testing.expectEqual(DateTime{ .year = 2020, .month = 11, .day = 1, .hour = 5, .minute = 6, .second = 7 }, timestampToDateTime(1604207167));
// Get time for date: https://wtools.io/convert-date-time-to-unix-time
try std.testing.expectEqual(DateTime{ .year = 2015, .month = 08, .day = 30, .hour = 12, .minute = 36, .second = 00 }, timestampToDateTime(1440938160));
}