public MTARC(Stream input)
{
_stream = input;
using (var br = new BinaryReaderX(input, true, ByteOrder))
{
// Set endianess
if (br.PeekString() == "\0CRA" || br.PeekString() == "\0SFH")
{
br.ByteOrder = ByteOrder = ByteOrder.BigEndian;
HeaderLength = 8;
System = Platform.PS3;
}
// HFSHeader
if (br.PeekString() == "HFS" || br.PeekString() == "\0SFH")
{
HFSHeader = br.ReadStruct <HFSHeader>();
HFSHeaderLength = HFSHeader.Type == 0 ? 0x20000 : 0x10;
}
// Header
Header = br.ReadStruct <Header>();
switch (Header.Version)
{
case 0x7:
HeaderLength = 8;
break;
}
if (ByteOrder == ByteOrder.LittleEndian && Header.Version != 7)
{
br.ReadInt32();
}
// Files
var entries = br.ReadMultiple <FileMetadata>(Header.EntryCount);
Files.AddRange(entries.Select(metadata =>
{
br.BaseStream.Position = metadata.Offset + HFSHeaderLength;
var level = (System == Platform.CTR ? metadata.CompressedSize != (metadata.UncompressedSize & 0x00FFFFFF) : metadata.CompressedSize != (metadata.UncompressedSize >> 3)) ? CompressionLevel.Optimal : CompressionLevel.NoCompression;
br.BaseStream.Position += metadata.CompressedSize;
return(new MTArcFileInfo
{
Metadata = metadata,
CompressionLevel = level,
System = System,
FileData = new SubStream(br.BaseStream, metadata.Offset + HFSHeaderLength, metadata.CompressedSize),
FileName = metadata.FileName + (ArcShared.ExtensionMap.ContainsKey(metadata.ExtensionHash) ? ArcShared.ExtensionMap[metadata.ExtensionHash] : "." + metadata.ExtensionHash.ToString("X8")),
State = ArchiveFileState.Archived
});
}));
// HFSFooter
if (HFSHeader != null)
{
br.SeekAlignment();
HFSFooter = br.ReadStruct <HFSFooter>();
}
}
}
public MTARC(Stream input)
{
_stream = input;
using (var br = new BinaryReaderX(input, true, ByteOrder))
{
// Set endianess
if (br.PeekString() == "\0CRA" || br.PeekString() == "\0SFH")
{
br.ByteOrder = ByteOrder = ByteOrder.BigEndian;
HeaderLength = 8;
System = Platform.PS3;
}
// HFSHeader
if (br.PeekString() == "HFS" || br.PeekString() == "\0SFH")
{
HFSHeader = br.ReadStruct <HFSHeader>();
HFSHeaderLength = HFSHeader.Type == 0 ? 0x20000 : 0x10;
}
// Header
Header = br.ReadStruct <Header>();
switch (Header.Version)
{
case 0x9:
System = Platform.Switch;
HeaderLength = 8;
break;
case 0x7:
HeaderLength = 8;
break;
}
if (ByteOrder == ByteOrder.LittleEndian && Header.Version != 7 && Header.Version != 9)
{
br.ReadInt32();
}
// Files
if (Header.Version == 9)
{
var entries = br.ReadMultiple <FileMetadataSwitch>(Header.EntryCount);
Files.AddRange(entries.Select(metadata =>
{
//it seems every file is compressed with ZLib on Switch
//example file game.arc contains of at least one file "om120a" where compressed and uncompressed size are equal but the file is still compressed
//the decompressed file is really the same size; comparing with other entries no clear differences were found, that would indicate a
//compression flag
br.BaseStream.Position = metadata.Offset;
var level = CompressionLevel.Optimal;
br.BaseStream.Position += metadata.CompressedSize;
return(new MTArcFileInfo
{
SwitchMetadata = metadata,
CompressionLevel = level,
System = System,
FileData = new SubStream(br.BaseStream, metadata.Offset, metadata.CompressedSize),
FileName = metadata.FileName + (ArcShared.ExtensionMap.ContainsKey(metadata.ExtensionHash) ? ArcShared.ExtensionMap[metadata.ExtensionHash] : "." + metadata.ExtensionHash.ToString("X8")),
State = ArchiveFileState.Archived
});
}));
}
else
{
var entries = br.ReadMultiple <FileMetadata>(Header.EntryCount);
Files.AddRange(entries.Select(metadata =>
{
br.BaseStream.Position = metadata.Offset + HFSHeaderLength;
var level = (System == Platform.CTR
? metadata.CompressedSize != (metadata.UncompressedSize & 0x00FFFFFF)
: System == Platform.Switch ? metadata.CompressedSize != metadata.UncompressedSize
: metadata.CompressedSize != (metadata.UncompressedSize >> 3))
? CompressionLevel.Optimal : CompressionLevel.NoCompression;
br.BaseStream.Position += metadata.CompressedSize;
return(new MTArcFileInfo
{
Metadata = metadata,
CompressionLevel = level,
System = System,
FileData = new SubStream(br.BaseStream, metadata.Offset + HFSHeaderLength, metadata.CompressedSize),
FileName = metadata.FileName + (ArcShared.ExtensionMap.ContainsKey(metadata.ExtensionHash) ? ArcShared.ExtensionMap[metadata.ExtensionHash] : "." + metadata.ExtensionHash.ToString("X8")),
State = ArchiveFileState.Archived
});
}));
}
// HFSFooter
if (HFSHeader != null)
{
br.SeekAlignment();
HFSFooter = br.ReadStruct <HFSFooter>();
}
}
}
