Split off timezone module
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parent
2578b0f4fa
commit
8ab36acb45
217
src/main.zig
217
src/main.zig
@ -3,154 +3,14 @@ const debug = std.debug;
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const testing = std.testing;
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pub const Year = @import("year.zig").Year;
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pub const Month = @import("month.zig").Month;
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pub const tz = @import("timezone.zig");
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pub const Offset = tz.Offset;
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pub const TimeZone = tz.TimeZone;
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pub const SECONDS_PER_MINUTE = 60;
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pub const SECONDS_PER_HOUR = 60 * 60;
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pub const SECONDS_PER_DAY = SECONDS_PER_HOUR * 24;
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pub const TimeZoneTag = enum(u1) {
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utc,
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offset,
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};
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pub const Sign = enum(u1) {
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positive,
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negative,
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};
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const HoursMinutes = struct {
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hours: u4,
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minutes: ?u6,
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};
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pub const Offset = union(Sign) {
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positive: HoursMinutes,
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negative: HoursMinutes,
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const Self = @This();
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fn new(hours: i8, minutes: ?u6) ?Self {
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if (hours > 12 or hours < -12) {
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return null;
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}
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if (minutes) |m| {
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if (m > 59) return null;
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if (hours == 0 and m == 0) return null;
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} else if (hours == 0) return null;
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if (hours < 0) {
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const h = @intCast(u4, @as(i8, hours) * -1);
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return Self{ .negative = .{ .hours = h, .minutes = minutes } };
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} else {
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return Self{ .positive = .{ .hours = @intCast(u4, hours), .minutes = minutes } };
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}
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}
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fn asSeconds(self: Self) i64 {
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return switch (self) {
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.positive => |ofs| blk: {
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var seconds = @as(i64, ofs.hours) * 3600;
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if (ofs.minutes) |m| seconds += (@as(i64, m) * 60);
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break :blk seconds;
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},
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.negative => |ofs| blk: {
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var seconds = @as(i64, ofs.hours) * 3600;
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if (ofs.minutes) |m| seconds += (@as(i64, m) * 60);
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break :blk seconds * -1;
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},
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};
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}
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};
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test "new year" {
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try testing.expectEqual(Year.new(2023), Year{ .normal = 2023 });
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try testing.expectEqual(Year.new(2024), Year{ .leap = 2024 });
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debug.print("Passed\n", .{});
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}
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test "get year" {
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try testing.expectEqual(Year.new(2023).get(), 2023);
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try testing.expectEqual(Year.new(2024).get(), 2024);
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debug.print("Passed\n", .{});
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}
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test "next year" {
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try testing.expectEqual(Year.new(2023).next(), Year{ .leap = 2024 });
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debug.print("Passed\n", .{});
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}
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test "last year" {
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try testing.expectEqual(Year.new(2024).previous(), Year{ .normal = 2023 });
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debug.print("Passed\n", .{});
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}
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test "get days in month" {
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const year = Year.new(2023);
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const month = Month.february;
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try testing.expectEqual(month.days(year), 28);
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debug.print("Passed\n", .{});
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}
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test "next month" {
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try testing.expectEqual(Month.june.next(), .july);
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try testing.expectEqual(Month.december.next(), null);
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debug.print("Passed\n", .{});
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}
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test "last month" {
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try testing.expectEqual(Month.june.previous(), .may);
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try testing.expectEqual(Month.january.previous(), null);
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debug.print("Passed\n", .{});
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}
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test "new offsets" {
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try testing.expectEqual(Offset.new(-5, null), Offset{ .negative = .{ .hours = 5, .minutes = null } });
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try testing.expectEqual(Offset.new(3, null), Offset{ .positive = .{ .hours = 3, .minutes = null } });
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debug.print("Passed\n", .{});
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}
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test "as seconds" {
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try testing.expectEqual(Offset.new(-4, 30).?.asSeconds(), -16200);
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try testing.expectEqual(Offset.new(3, null).?.asSeconds(), 10800);
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debug.print("Passed\n", .{});
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}
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pub const TimeZone = union(TimeZoneTag) {
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utc: void,
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offset: Offset,
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const Self = @This();
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pub fn new(hours: ?i8, minutes: ?u6) ?Self {
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return if (hours) |h| blk: {
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if (h == 0) {
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break :blk .utc;
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} else if (Offset.new(h, minutes)) |ofs| {
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break :blk Self{ .offset = ofs };
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} else {
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break :blk null;
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}
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} else if (minutes) |m| Self{ .offset = Offset.new(0, m).? } else .utc;
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}
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};
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test "new timezone" {
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const tz = TimeZone.new(-5, null).?;
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try testing.expectEqual(@as(TimeZoneTag, tz), .offset);
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switch (tz) {
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.offset => |ofs| try testing.expectEqual(ofs, Offset{ .negative = .{ .hours = 5, .minutes = null } }),
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else => unreachable,
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}
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debug.print("Passed\n", .{});
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}
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test "new timezone utc" {
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const tz0 = TimeZone.new(null, null).?;
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const tz1 = TimeZone.new(0, null).?;
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try testing.expectEqual(@as(TimeZoneTag, tz0), .utc);
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try testing.expectEqual(@as(TimeZoneTag, tz1), .utc);
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debug.print("Passed\n", .{});
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}
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pub const WeekDay = enum(u3) {
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thursday = 0,
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friday,
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@ -323,6 +183,77 @@ pub const DateTime = struct {
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}
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};
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test "new year" {
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try testing.expectEqual(Year.new(2023), Year{ .normal = 2023 });
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try testing.expectEqual(Year.new(2024), Year{ .leap = 2024 });
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debug.print("Passed\n", .{});
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}
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test "get year" {
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try testing.expectEqual(Year.new(2023).get(), 2023);
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try testing.expectEqual(Year.new(2024).get(), 2024);
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debug.print("Passed\n", .{});
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}
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test "next year" {
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try testing.expectEqual(Year.new(2023).next(), Year{ .leap = 2024 });
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debug.print("Passed\n", .{});
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}
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test "last year" {
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try testing.expectEqual(Year.new(2024).previous(), Year{ .normal = 2023 });
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debug.print("Passed\n", .{});
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}
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test "get days in month" {
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const year = Year.new(2023);
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const month = Month.february;
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try testing.expectEqual(month.days(year), 28);
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debug.print("Passed\n", .{});
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}
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test "next month" {
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try testing.expectEqual(Month.june.next(), .july);
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try testing.expectEqual(Month.december.next(), null);
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debug.print("Passed\n", .{});
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}
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test "last month" {
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try testing.expectEqual(Month.june.previous(), .may);
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try testing.expectEqual(Month.january.previous(), null);
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debug.print("Passed\n", .{});
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}
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test "new offsets" {
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try testing.expectEqual(Offset.new(-5, null), Offset{ .negative = .{ .hours = 5, .minutes = null } });
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try testing.expectEqual(Offset.new(3, null), Offset{ .positive = .{ .hours = 3, .minutes = null } });
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debug.print("Passed\n", .{});
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}
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test "as seconds" {
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try testing.expectEqual(Offset.new(-4, 30).?.asSeconds(), -16200);
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try testing.expectEqual(Offset.new(3, null).?.asSeconds(), 10800);
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debug.print("Passed\n", .{});
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}
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test "new timezone" {
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const zone = TimeZone.new(-5, null).?;
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try testing.expectEqual(@as(tz.TimeZoneTag, zone), .offset);
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switch (zone) {
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.offset => |ofs| try testing.expectEqual(ofs, Offset{ .negative = .{ .hours = 5, .minutes = null } }),
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else => unreachable,
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}
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debug.print("Passed\n", .{});
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}
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test "new timezone utc" {
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const tz0 = TimeZone.new(null, null).?;
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const tz1 = TimeZone.new(0, null).?;
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try testing.expectEqual(@as(tz.TimeZoneTag, tz0), .utc);
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try testing.expectEqual(@as(tz.TimeZoneTag, tz1), .utc);
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debug.print("Passed\n", .{});
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}
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test "get year" {
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const dt = DateTime{
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.year = Year.new(2023),
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75
src/timezone.zig
Normal file
75
src/timezone.zig
Normal file
@ -0,0 +1,75 @@
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const std = @import("std");
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const debug = std.debug;
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const testing = std.testing;
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pub const TimeZoneTag = enum(u1) {
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utc,
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offset,
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};
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pub const Sign = enum(u1) {
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positive,
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negative,
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};
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const HoursMinutes = struct {
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hours: u4,
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minutes: ?u6,
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};
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pub const Offset = union(Sign) {
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positive: HoursMinutes,
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negative: HoursMinutes,
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const Self = @This();
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pub fn new(hours: i8, minutes: ?u6) ?Self {
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if (hours > 12 or hours < -12) {
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return null;
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}
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if (minutes) |m| {
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if (m > 59) return null;
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if (hours == 0 and m == 0) return null;
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} else if (hours == 0) return null;
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if (hours < 0) {
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const h = @intCast(u4, @as(i8, hours) * -1);
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return Self{ .negative = .{ .hours = h, .minutes = minutes } };
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} else {
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return Self{ .positive = .{ .hours = @intCast(u4, hours), .minutes = minutes } };
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}
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}
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pub fn asSeconds(self: Self) i64 {
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return switch (self) {
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.positive => |ofs| blk: {
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var seconds = @as(i64, ofs.hours) * 3600;
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if (ofs.minutes) |m| seconds += (@as(i64, m) * 60);
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break :blk seconds;
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},
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.negative => |ofs| blk: {
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var seconds = @as(i64, ofs.hours) * 3600;
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if (ofs.minutes) |m| seconds += (@as(i64, m) * 60);
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break :blk seconds * -1;
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},
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};
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}
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};
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pub const TimeZone = union(TimeZoneTag) {
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utc: void,
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offset: Offset,
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const Self = @This();
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pub fn new(hours: ?i8, minutes: ?u6) ?Self {
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return if (hours) |h| blk: {
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if (h == 0) {
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break :blk .utc;
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} else if (Offset.new(h, minutes)) |ofs| {
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break :blk Self{ .offset = ofs };
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} else {
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break :blk null;
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}
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} else if (minutes) |m| Self{ .offset = Offset.new(0, m).? } else .utc;
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}
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};
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