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CompressedEmbeddedFileSource doesn't seem to do anything at the moment

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This commit is contained in:
Michael Becker 2019-11-10 13:19:07 -05:00
parent c34ea7f74f
commit 419bc16afc
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GPG Key ID: 389DFF5D73781A12
1 changed files with 85 additions and 1 deletions
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86
CSharp/Plugins/UniversalEditor.Plugins.FileSystem/DataFormats/FileSystem/ZIP/ZIPDataFormat.cs
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@ -71,7 +71,7 @@ namespace UniversalEditor.DataFormats.FileSystem.ZIP
uint unknown6 = br.ReadUInt32();
uint compressedLength = br.ReadUInt32();
uint decompressedLength = br.ReadUInt32();
ushort fileNameLength = br.ReadUInt16(); // oops... had this as Int32
ushort fileNameLength = br.ReadUInt16(); // oops... had this as Int32
ushort extraFieldLength = br.ReadUInt16();
ushort unknown7 = br.ReadUInt16();
ushort unknown8 = br.ReadUInt16();
@ -93,10 +93,14 @@ namespace UniversalEditor.DataFormats.FileSystem.ZIP
file.Properties.Add("offset", fileOffset);
file.Properties.Add("compressedLength", compressedLength);
file.Properties.Add("decompressedLength", decompressedLength);
file.Size = decompressedLength;
file.DataRequest += File_DataRequest; // file sources are unreliable atm
/*
file.Source = new CompressedEmbeddedFileSource(br, fileOffset, decompressedLength, compressedLength, new FileSourceTransformation[]
{
new FileSourceTransformation(FileSourceTransformationType.Output, HandleFileSourceTransformationFunction)
});
*/
}
return;
}
@ -185,6 +189,86 @@ namespace UniversalEditor.DataFormats.FileSystem.ZIP
}
}
void File_DataRequest(object sender, DataRequestEventArgs e)
{
File file = (sender as File);
uint decompressedLength = (uint)file.Properties["decompressedLength"];
uint compressedLength = (uint)file.Properties["compressedLength"];
uint offset = (uint)file.Properties["offset"];
Reader br = Accessor.Reader;
long curpos = Accessor.Position;
Accessor.Seek(offset, SeekOrigin.Begin);
byte[] headerSignature = br.ReadBytes(4);
if (!headerSignature.Match(new byte[] { 0x50, 0x4B, 0x03, 0x04 }))
{
}
CompressionMethod method = CompressionMethod.None;
short iMinimumVersionNeededToExtract = br.ReadInt16();
short iGeneralPurposeBitFlag = br.ReadInt16();
short iCompressionMethod = br.ReadInt16();
switch (iCompressionMethod)
{
case 8:
{
method = CompressionMethod.Deflate;
break;
}
case 9:
{
method = CompressionMethod.Deflate64;
break;
}
case 12:
{
method = CompressionMethod.Bzip2;
break;
}
case 14:
{
method = CompressionMethod.LZMA;
break;
}
}
short iFileLastModificationTime = br.ReadInt16();
short iFileLastModificationDate = br.ReadInt16();
bool isEncrypted = false;
int iCRC32 = br.ReadInt32();
int packedFileLength = br.ReadInt32();
int unpackedFileLength = br.ReadInt32();
short local_fileNameLength = br.ReadInt16();
short extraFieldLength = br.ReadInt16();
string local_fileName = br.ReadFixedLengthString(local_fileNameLength);
long local_pos = br.Accessor.Position;
while (br.Accessor.Position < (local_pos + extraFieldLength))
{
short chunkIDCode = br.ReadInt16();
short chunkLength = br.ReadInt16();
byte[] data = br.ReadBytes(chunkLength);
}
byte[] compressedData = br.ReadBytes(compressedLength);
br.Accessor.Position = curpos;
byte[] decompressedData = compressedData;
if (compressedLength != decompressedLength)
{
decompressedData = UniversalEditor.Compression.CompressionModules.Deflate.Decompress(compressedData);
if (decompressedData.Length != decompressedLength)
{
Console.WriteLine("zip: sanity check - decompressed data length (" + decompressedData.Length.ToString() + ") does not match expected value (" + decompressedLength.ToString() + ")");
}
}
e.Data = decompressedData;
}
void HandleFileSourceTransformationFunction(object sender, System.IO.Stream inputStream, System.IO.Stream outputStream)
{
File file = (sender as File);