mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-27 14:30:56 +00:00
49 lines
1.8 KiB
C#
49 lines
1.8 KiB
C#
using System;
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using System.ComponentModel;
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namespace PKHeX.Core;
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/// <summary>
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/// Stores the <see cref="Timestamp"/> to indicate the seconds since 1900 (rounded to days) that an event occurred.
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/// </summary>
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[TypeConverter(typeof(ExpandableObjectConverter))]
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public sealed class Epoch1900Value
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{
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// Data should be 4 bytes where we only care about the first 3 bytes i.e. 24 bits
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// First 6 bits are day, next 6 bits are 0 indexed month, last 12 bits are year from 1900
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private readonly Memory<byte> Data;
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private Span<byte> Span => Data.Span;
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public Epoch1900Value(SCBlock block) : this(block.Data) { }
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public Epoch1900Value(Memory<byte> data) => Data = data;
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private static DateTime Epoch => new(1900, 1, 1);
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public DateTime Timestamp
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{
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get => Epoch
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.AddDays(Span[2] >> 2)
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.AddDays(-1)
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.AddMonths(((Span[2] & 0b0000_0011) << 2) | ((Span[1] & 0b1111_0000) >> 4))
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.AddYears(((Span[1] & 0b0000_1111) << 4) | Span[0]);
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set {
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int day = value.Day;
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int month = value.Month - Epoch.Month;
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int year = value.Year - Epoch.Year;
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Span[2] = (byte)(((day & 0b0011_1111) << 2) | ((month & 0b0011_0000) >> 4));
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Span[1] = (byte)(((month & 0b0000_1111) << 4) | ((year & 0b1111_0000_00000) >> 8));
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Span[0] = (byte)(year & 0b1111_1111);
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}
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}
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public string DisplayValue => $"{Timestamp.Year:0000}-{Timestamp.Month:00}-{Timestamp.Day:00} {Timestamp.Hour:00}ː{Timestamp.Minute:00}ː{Timestamp.Second:00}"; // not :
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/// <summary>
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/// time_t (seconds since 1900 Epoch rounded to days)
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/// </summary>
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public ulong Seconds
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{
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get => (ulong)(Timestamp - Epoch).TotalSeconds;
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set => Timestamp = Epoch.AddSeconds(value);
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}
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}
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