/// <summary>
/// CompressPropertyData - compresses property data using the compression defined by 'compressor'
/// </summary>
/// <param name="input">The int[] of packet data to compress</param>
/// <param name="algorithm">In: the desired algorithm to use. Out: the algorithm used</param>
/// <returns>the compressed data in a byte[]</returns>
#endif
internal static byte[] CompressPacketData(
#if OLD_ISF
Compressor compressor,
#endif
int[] input,
ref byte algorithm)
{
#if OLD_ISF
//
// lock to prevent multi-threaded vulnerabilities
//
lock (_compressSync)
{
#endif
if (input == null)
{
//we don't raise any information that could be used to attack our ISF code
//a simple 'ISF Operation Failed' is sufficient since the user can't do
//anything to fix bogus ISF
throw new InvalidOperationException(SR.Get(SRID.IsfOperationFailed));
}
byte[] data = AlgoModule.CompressPacketData(input, algorithm);
#if OLD_ISF
uint cbOutSize = 0;
MS.Win32.Penimc.CompressorSafeHandle safeCompressorHandle = (compressor == null) ?
MS.Win32.Penimc.CompressorSafeHandle.Null : compressor._compressorHandle;
int hr = MS.Win32.Penimc.UnsafeNativeMethods.IsfCompressPacketData(safeCompressorHandle, input, (uint)input.Length, ref algorithm, ref cbOutSize, null);
if (0 == hr)
{
byte[] data2 = new byte[cbOutSize];
hr = MS.Win32.Penimc.UnsafeNativeMethods.IsfCompressPacketData(safeCompressorHandle, input, (uint)input.Length, ref algorithm, ref cbOutSize, data2);
if (0 == hr)
{
//see if data matches
if (data2.Length != data.Length)
{
throw new InvalidOperationException("MAGIC EXCEPTION: Packet data length didn't match with new compression");
}
for (int i = 0; i < data2.Length; i++)
{
if (data2[i] != data[i])
{
throw new InvalidOperationException("MAGIC EXCEPTION: Packet data didn't match with new compression at index " + i.ToString());
}
}
return data;
}
}
throw new InvalidOperationException(StrokeCollectionSerializer.ISFDebugMessage("IsfCompressPacketData returned:" + hr.ToString(CultureInfo.InvariantCulture)));
}
#else
return data;
#endif
}
public void Dispose()
{
if (_disposed)
{
return;
}
_compressorHandle.Dispose();
_disposed = true;
_compressorHandle = null;
}
internal Compressor(byte[] data, ref uint size)
{
if (data == null || data.Length != size)
{
//we don't raise any information that could be used to attack our ISF code
//a simple 'ISF Operation Failed' is sufficient since the user can't do
//anything to fix bogus ISF
throw new InvalidOperationException(StrokeCollectionSerializer.ISFDebugMessage(SR.Get(SRID.InitializingCompressorFailed)));
}
_compressorHandle = MS.Win32.Penimc.UnsafeNativeMethods.IsfLoadCompressor(data, ref size);
if (_compressorHandle.IsInvalid)
{
//we don't raise any information that could be used to attack our ISF code
//a simple 'ISF Operation Failed' is sufficient since the user can't do
//anything to fix bogus ISF
throw new InvalidOperationException(StrokeCollectionSerializer.ISFDebugMessage(SR.Get(SRID.InitializingCompressorFailed)));
}
}
/// <summary>
/// DecompressPacketData - take a byte[] or a subset of a byte[] and decompresses it into
/// an int[] of packet data (for example, x's in a Stroke)
/// </summary>
/// <param name="compressedInput">The byte[] to decompress</param>
/// <param name="size">In: the max size of the subset of compressedInput to read, out: size read</param>
/// <param name="decompressedPackets">The int[] to write the packet data to</param>
#endif
internal static void DecompressPacketData(
#if OLD_ISF
Compressor compressor,
#endif
byte[] compressedInput,
ref uint size,
int[] decompressedPackets)
{
#if OLD_ISF
//
// lock to prevent multi-threaded vulnerabilities
//
lock (_compressSync)
{
#endif
if (compressedInput == null ||
size > compressedInput.Length ||
decompressedPackets == null)
{
//we don't raise any information that could be used to attack our ISF code
//a simple 'ISF Operation Failed' is sufficient since the user can't do
//anything to fix bogus ISF
throw new InvalidOperationException(StrokeCollectionSerializer.ISFDebugMessage(SR.Get(SRID.DecompressPacketDataFailed)));
}
#if OLD_ISF
uint size2 = size;
#endif
size = AlgoModule.DecompressPacketData(compressedInput, decompressedPackets);
#if OLD_ISF
MS.Win32.Penimc.CompressorSafeHandle safeCompressorHandle = (compressor == null) ?
MS.Win32.Penimc.CompressorSafeHandle.Null :
compressor._compressorHandle;
int[] decompressedPackets2 = new int[decompressedPackets.Length];
byte algo = AlgoModule.NoCompression;
int hr = MS.Win32.Penimc.UnsafeNativeMethods.IsfDecompressPacketData(safeCompressorHandle,
compressedInput,
ref size2,
(uint)decompressedPackets2.Length,
decompressedPackets2,
ref algo);
if (0 != hr)
{
//we don't raise any information that could be used to attack our ISF code
//a simple 'ISF Operation Failed' is sufficient since the user can't do
//anything to fix bogus ISF
throw new InvalidOperationException(StrokeCollectionSerializer.ISFDebugMessage("IsfDecompressPacketData returned: " + hr.ToString(CultureInfo.InvariantCulture)));
}
if (size != size2)
{
throw new InvalidOperationException("MAGIC EXCEPTION: Packet data bytes read didn't match with new uncompression");
}
for (int i = 0; i < decompressedPackets.Length; i++)
{
if (decompressedPackets[i] != decompressedPackets2[i])
{
throw new InvalidOperationException("MAGIC EXCEPTION: Packet data didn't match with new uncompression at index " + i.ToString());
}
}
}
#endif
}
