public static byte[] LowLevelCompress(byte[] bytes, Shell.EndianFormat byteOrder)
{
Contract.Requires <ArgumentNullException>(bytes != null);
Contract.Ensures(Contract.Result <byte[]>() != null);
byte[] result = new byte[sizeof(int)];
// Setup the decompressed size header
byte[] size_bytes = BitConverter.GetBytes(bytes.Length);
if (!byteOrder.IsSameAsRuntime())
{
Bitwise.ByteSwap.SwapInt32(size_bytes, 0);
}
Array.Copy(size_bytes, result, size_bytes.Length);
var zip = new ICSharpCode.SharpZipLib.Zip.Compression.Deflater(
ICSharpCode.SharpZipLib.Zip.Compression.Deflater.BEST_COMPRESSION, false);
{
zip.SetInput(bytes);
zip.Finish();
byte[] temp = new byte[bytes.Length];
int compressed_size = zip.Deflate(temp);
Contract.Assert(compressed_size <= bytes.Length);
Array.Resize(ref result, sizeof(int) + compressed_size);
Array.Copy(temp, 0, result, sizeof(int), compressed_size);
}
return(result);
}
// #REVIEW: .NET 4.5: BinaryReader has 'bool leaveOpen' ctor
#region Ctor
/// <summary>Create a new binary reader which respects the endian format of the underlying stream's bytes</summary>
/// <param name="input">Base stream to use as input</param>
/// <param name="encoding">Character encoding to use. If null, <see cref="System.Text.UTF8Encoding"/> is assumed</param>
/// <param name="byteOrder">Endian format for how we interpret the stream's bytes</param>
/// <param name="streamOwner">Owner object of this stream, or null</param>
/// <param name="name">Special name to associate with this stream</param>
public EndianReader(Stream input, Encoding encoding,
Shell.EndianFormat byteOrder, object streamOwner = null, string name = null) : base(input, encoding)
{
Contract.Requires <ArgumentNullException>(input != null);
Contract.Requires <ArgumentNullException>(encoding != null);
BaseStreamOwner = true;
BaseAddress = Values.PtrHandle.Null32;
ByteOrder = byteOrder;
Owner = streamOwner;
mStringEncoding = encoding;
StreamName = name ?? "(unnamed)";
// If the stream is a different endian than the runtime, data will
// be byte swapped of course
//this.mRequiresByteSwap = Shell.Platform.Environment.ProcessorType.ByteOrder != byteOrder;
mRequiresByteSwap = !byteOrder.IsSameAsRuntime();
}
