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[ALL] Allow for original Dates to be written again in zipfiles

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This commit is contained in:
Matt Nadareski
2016-10-14 16:58:15 -07:00
parent cbbab3518c
commit 1a998d575c
12 changed files with 245 additions and 115 deletions
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24
SabreTools.Helper/Tools/Style.cs
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@@ -550,6 +550,30 @@ namespace SabreTools.Helper
return hexOutput;
}
/// <summary>
/// Adapted from 7-zip Source Code: CPP/Windows/TimeUtils.cpp:FileTimeToDosTime
/// </summary>
public static uint ConvertDateTimeToMsDosTimeFormat(DateTime dateTime)
{
uint year = (uint)((dateTime.Year - 1980) % 128);
uint mon = (uint)dateTime.Month;
uint day = (uint)dateTime.Day;
uint hour = (uint)dateTime.Hour;
uint min = (uint)dateTime.Minute;
uint sec = (uint)dateTime.Second;
return (year << 25) | (mon << 21) | (day << 16) | (hour << 11) | (min << 5) | (sec >> 1);
}
/// <summary>
/// Adapted from 7-zip Source Code: CPP/Windows/TimeUtils.cpp:DosTimeToFileTime
/// </summary>
public static DateTime ConvertMsDosTimeFormatToDateTime(uint msDosDateTime)
{
return new DateTime((int)(1980 + (msDosDateTime >> 25)), (int)((msDosDateTime >> 21) & 0xF), (int)((msDosDateTime >> 16) & 0x1F),
(int)((msDosDateTime >> 11) & 0x1F), (int)((msDosDateTime >> 5) & 0x3F), (int)((msDosDateTime & 0x1F) * 2));
}
/// <summary>
/// Determines a text file's encoding by analyzing its byte order mark (BOM).
/// Defaults to ASCII when detection of the text file's endianness fails.