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42 lines
1.2 KiB
C#
42 lines
1.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SCJMapper_V2.p4kFile
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{
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class p4kFileTStamp
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{
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/// <summary>
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/// Converts from Zip (DOS) File date time to .Net DatetTime format
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/// </summary>
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/// <param name="date">A DOS file date integer</param>
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/// <param name="time">A DOS file time integer</param>
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/// <returns>The DateTime conversion of the input</returns>
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public static DateTime FromDos( UInt16 date, UInt16 time )
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{
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// DOS date : hBit-- YYYYYYY MMMM TTTTT (year + 1980)
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// DOS time : hBit-- hhhhh mmmmmm xxxxx (x*2 = sec)
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int year = ( ( date >> 9 ) & 0x7f ) + 1980;
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int month = ( date >> 5 ) & 0x0f;
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int day = date & 0x01f;
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int hour = ( time >> 11 ) & 0x1f;
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int min = ( time >> 5 ) & 0x3f;
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int sec = ( time & 0x01f ) * 2;
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try {
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var ret = new DateTime( year, month, day, hour, min, sec );
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return ret;
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}
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#pragma warning disable CS0168 // Variable is declared but never used
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catch ( Exception e ) {
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#pragma warning restore CS0168 // Variable is declared but never used
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return new DateTime( 1970, 1, 1 );
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}
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}
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}
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}
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