protected ZiPatchChunk(ChecksumBinaryReader reader, int offset, int size)
{
this.Reader = reader;
Offset = offset;
Size = size;
}
public static ZiPatchChunk GetCommand(ChecksumBinaryReader reader, int offset, int size)
{
try
{
// Have not seen this differ from size
var innerSize = reader.ReadInt32BE();
if (size != innerSize)
{
throw new ZiPatchException();
}
var command = reader.ReadFixedLengthString(1u);
if (!CommandTypes.TryGetValue(command, out var constructor))
{
throw new ZiPatchException();
}
var chunk = constructor(reader, offset, innerSize - 5);
return(chunk);
}
catch (EndOfStreamException e)
{
throw new ZiPatchException("Could not get command", e);
}
}
public static ZiPatchChunk GetChunk(Stream stream)
{
localMemoryStream.Value = localMemoryStream.Value ?? new MemoryStream();
var memoryStream = localMemoryStream.Value;
try
{
var reader = new BinaryReader(stream);
var size = reader.ReadInt32BE();
var baseOffset = (int)stream.Position;
// size of chunk + header + checksum
var readSize = size + 4 + 4;
// Enlarge MemoryStream if necessary, or set length at capacity
var maxLen = Math.Max(readSize, memoryStream.Capacity);
if (memoryStream.Length < maxLen)
{
memoryStream.SetLength(maxLen);
}
// Read into MemoryStream's inner buffer
reader.BaseStream.Read(memoryStream.GetBuffer(), 0, readSize);
var binaryReader = new ChecksumBinaryReader(memoryStream);
binaryReader.InitCrc32();
var type = binaryReader.ReadFixedLengthString(4u);
if (!ChunkTypes.TryGetValue(type, out var constructor))
{
throw new ZiPatchException();
}
var chunk = constructor(binaryReader, baseOffset, size);
chunk.ReadChunk();
chunk.ReadChecksum();
return(chunk);
}
catch (EndOfStreamException e)
{
throw new ZiPatchException("Could not get chunk", e);
}
finally
{
memoryStream.Position = 0;
}
}
public FileHeaderChunk(ChecksumBinaryReader reader, int offset, int size) : base(reader, offset, size)
{
}
public SqpkAddData(ChecksumBinaryReader reader, int size) : base(reader, size)
{
}
public SqpkPatchInfo(ChecksumBinaryReader reader, int size) : base(reader, size)
{
}
public XXXXChunk(ChecksumBinaryReader reader, int size) : base(reader, size)
{
}
public ApplyOptionChunk(ChecksumBinaryReader reader, int offset, int size) : base(reader, offset, size)
{
}
public SqpkDeleteData(ChecksumBinaryReader reader, int offset, int size) : base(reader, offset, size)
{
}
public ApplyFreeSpaceChunk(ChecksumBinaryReader reader, int offset, int size) : base(reader, offset, size)
{
}
public DeleteDirectoryChunk(ChecksumBinaryReader reader, int size) : base(reader, size)
{
}
public EndOfFileChunk(ChecksumBinaryReader reader, int size) : base(reader, size)
{
}
public AddDirectoryChunk(ChecksumBinaryReader reader, int offset, int size) : base(reader, offset, size) {}
protected ZiPatchChunk(ChecksumBinaryReader reader, int size)
{
this.reader = reader;
Size = size;
}
public SqpkFile(ChecksumBinaryReader reader, int offset, int size) : base(reader, offset, size)
{
}
protected SqpkChunk(ChecksumBinaryReader reader, int offset, int size) : base(reader, offset, size)
{
}
public SqpkTargetInfo(ChecksumBinaryReader reader, int size) : base(reader, size)
{
}
public SqpkIndex(ChecksumBinaryReader reader, int size) : base(reader, size)
{
}
