private static DateTime? ProcessExtendedTime(ushort extendedFlags, DateTime? time, MarkingBinaryReader reader, int i)
{
uint rmode = (uint)extendedFlags >> (3 - i) * 4;
if ((rmode & 8) == 0)
{
return null;
}
if (i != 0)
{
uint DosTime = reader.ReadUInt32();
time = Utilities.DosDateToDateTime(DosTime);
}
if ((rmode & 4) == 0)
{
time = time.Value.AddSeconds(1);
}
uint nanosecondHundreds = 0;
int count = (int)rmode & 3;
for (int j = 0; j < count; j++)
{
byte b = reader.ReadByte();
nanosecondHundreds |= (((uint)b) << ((j + 3 - count) * 8));
}
//10^-7 to 10^-3
return time.Value.AddMilliseconds(nanosecondHundreds * Math.Pow(10, -4));
}
protected override void ReadFromReader(MarkingBinaryReader reader)
{
uint lowUncompressedSize = reader.ReadUInt32();
HostOS = (HostOS)(int)reader.ReadByte();
FileCRC = reader.ReadUInt32();
FileLastModifiedTime = Utilities.DosDateToDateTime(reader.ReadInt32());
RarVersion = reader.ReadByte();
PackingMethod = reader.ReadByte();
short nameSize = reader.ReadInt16();
FileAttributes = reader.ReadInt32();
uint highCompressedSize = 0;
uint highUncompressedkSize = 0;
if (FileFlags.HasFlag(FileFlags.LARGE))
{
highCompressedSize = reader.ReadUInt32();
highUncompressedkSize = reader.ReadUInt32();
}
else
{
if (lowUncompressedSize == 0xffffffff)
{
lowUncompressedSize = 0xffffffff;
highUncompressedkSize = int.MaxValue;
}
}
CompressedSize = UInt32To64(highCompressedSize, AdditionalSize);
UncompressedSize = UInt32To64(highUncompressedkSize, lowUncompressedSize);
nameSize = nameSize > 4 * 1024 ? (short)(4 * 1024) : nameSize;
byte[] fileNameBytes = reader.ReadBytes(nameSize);
switch (HeaderType)
{
case HeaderType.FileHeader:
{
if (FileFlags.HasFlag(FileFlags.UNICODE))
{
int length = 0;
while (length < fileNameBytes.Length
&& fileNameBytes[length] != 0)
{
length++;
}
if (length != nameSize)
{
length++;
FileName = FileNameDecoder.Decode(fileNameBytes, length);
}
else
{
FileName = DecodeDefault(fileNameBytes);
}
}
else
{
FileName = DecodeDefault(fileNameBytes);
}
FileName = ConvertPath(FileName, HostOS);
}
break;
case HeaderType.NewSubHeader:
{
int datasize = HeaderSize - NEWLHD_SIZE - nameSize;
if (FileFlags.HasFlag(FileFlags.SALT))
{
datasize -= SALT_SIZE;
}
if (datasize > 0)
{
SubData = reader.ReadBytes(datasize);
}
if (NewSubHeaderType.SUBHEAD_TYPE_RR.Equals(fileNameBytes))
{
RecoverySectors = SubData[8] + (SubData[9] << 8)
+ (SubData[10] << 16) + (SubData[11] << 24);
}
}
break;
}
if (FileFlags.HasFlag(FileFlags.SALT))
{
Salt = reader.ReadBytes(SALT_SIZE);
}
if (FileFlags.HasFlag(FileFlags.EXTTIME))
{
ushort extendedFlags = reader.ReadUInt16();
FileLastModifiedTime = ProcessExtendedTime(extendedFlags, FileLastModifiedTime, reader, 0);
FileCreatedTime = ProcessExtendedTime(extendedFlags, null, reader, 1);
FileLastAccessedTime = ProcessExtendedTime(extendedFlags, null, reader, 2);
FileArchivedTime = ProcessExtendedTime(extendedFlags, null, reader, 3);
}
}