public void TestDecoderReturnsValidData()
{
IFilenameDecoder testSubject = new FileNameDecoder();
foreach (Expectation expectation in decoderDataProvider())
{
DecodedFileName decodedFileName = testSubject.DecodeFilename(expectation.TestFilename);
Assert.AreEqual(expectation.HeaderType, decodedFileName.HeaderType);
for (int i = 0; i < expectation.HeaderData.Length; i++)
{
Assert.AreEqual(expectation.HeaderData[i], decodedFileName.HeaderData[i]);
}
Assert.AreEqual(expectation.Filename, decodedFileName.Filename);
}
}
protected override void ReadFromReader(MarkingBinaryReader reader)
{
FileHeaderFlags = (FileFlags)reader.ReadVInt();
UnpackedSize = reader.ReadVInt();
Attributes = reader.ReadVInt();
if (FileHeaderFlags.HasFlag(FileFlags.TimeFieldIsPresent))
{
MTime = reader.ReadUInt32();
FileLastModifiedTime = Utility.UnixTimeToDateTime(MTime);
}
if (FileHeaderFlags.HasFlag(FileFlags.CRC32IsPresent))
{
DataCRC32 = reader.ReadUInt32();
}
CompressionInformation = reader.ReadVInt();
HostOS = (HostOS)reader.ReadVInt();
var nameSize = (int)reader.ReadVInt();
Name = Encoding.UTF8.GetString(reader.ReadBytes(nameSize));
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 = ArchiveEncoding.Decode(fileNameBytes);
}
}
else
{
FileName = ArchiveEncoding.Decode(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))
{
// verify that the end of the header hasn't been reached before reading the Extended Time.
// some tools incorrectly omit Extended Time despite specifying FileFlags.EXTTIME, which most parsers tolerate.
if (ReadBytes + reader.CurrentReadByteCount <= HeaderSize - 2)
{
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);
}
}
}
