/// <summary>Initializes a new instance of the GZipStream class using the specified stream and BZip2CompressionMode value.</summary>
/// <param name="stream">The stream to compress or decompress.</param>
/// <param name="mode">One of the BZip2CompressionMode values that indicates the action to take.</param>
/// <param name="opts">The encodgin/decoding options</param>
public unsafe LZMAStream(Stream stream, CompressionMode mode, ref LZMAOptionLZMA opts)
{
fixed(LZMAOptionLZMA *o = &opts)
{
Init(stream, mode, o);
}
}
public static unsafe LZMAStatus CompressBuffer(void *inBuff, IntPtr inLength, void *outBuff, IntPtr outLength, out IntPtr outPosition, int preset)
{
var options = new LZMAOptionLZMA((uint) preset);
var filters = stackalloc LZMAFilter[2];
filters[0].id = LZMANative.LZMA_FILTER_LZMA2;
filters[0].options = &options;
filters[1].id = LZMANative.LZMA_VLI_UNKNOWN;
return CompressBuffer(inBuff, inLength, outBuff, outLength, out outPosition, filters);
}
public static unsafe LZMAStatus CompressBuffer(void *inBuff, IntPtr inLength, void *outBuff, IntPtr outLength, out IntPtr outPosition, int preset)
{
var options = new LZMAOptionLZMA((uint)preset);
var filters = stackalloc LZMAFilter[2];
filters[0].id = LZMANative.LZMA_FILTER_LZMA2;
filters[0].options = &options;
filters[1].id = LZMANative.LZMA_VLI_UNKNOWN;
return(CompressBuffer(inBuff, inLength, outBuff, outLength, out outPosition, filters));
}
public unsafe void Init(Stream stream, CompressionMode mode, LZMAOptionLZMA *opts)
{
_compressedStream = stream;
_mode = mode;
_isClosed = false;
_zstreamBuff = new byte[sizeof(LZMAStreamNative)];
_zstreamHandle = GCHandle.Alloc(_zstreamBuff, GCHandleType.Pinned);
_zstream = (LZMAStreamNative*)_zstreamHandle.AddrOfPinnedObject().ToPointer();
_tmpBuffer = new byte[BufferSize];
_tmpBufferHandle = GCHandle.Alloc(_tmpBuffer, GCHandleType.Pinned);
_tmpBufferPtr = _tmpBufferHandle.AddrOfPinnedObject().ToPointer();
LZMAStatus ret;
switch (mode)
{
case CompressionMode.Compress:
// We will always use one filter, + 1 to mark the end of the filter array
var filters = stackalloc LZMAFilter[2];
filters[0].id = LZMANative.LZMA_FILTER_LZMA2;
filters[0].options = opts;
filters[1].id = LZMANative.LZMA_VLI_UNKNOWN;
ret = LZMANative.lzma_stream_encoder(_zstream, filters, LZMACheck.LZMA_CHECK_CRC64);
if (ret != LZMAStatus.LZMA_OK)
throw new ArgumentException(string.Format("Unable to init LZMA decoder. Return code: {0}", ret));
_zstream->next_out = _tmpBufferPtr;
_zstream->avail_out = (IntPtr)_tmpBuffer.Length;
break;
case CompressionMode.Decompress:
ret = LZMANative.lzma_auto_decoder(_zstream, 1024 * 1024 * 1024, 0);
if (ret != LZMAStatus.LZMA_OK)
throw new ArgumentException(string.Format("Unable to init LZMA decoder. Return code: {0}", ret));
break;
}
}
public static extern unsafe LZMAStatus lzma_alone_encoder(LZMAStreamNative* strm, ref LZMAOptionLZMA options);
public unsafe LZMAStream(Stream stream, CompressionMode mode, LZMAOptionLZMA *opts)
{ Init(stream, mode, opts); }
/// <summary>Initializes a new instance of the GZipStream class using the specified stream and BZip2CompressionMode value.</summary>
/// <param name="stream">The stream to compress or decompress.</param>
/// <param name="mode">One of the BZip2CompressionMode values that indicates the action to take.</param>
/// <param name="opts">The encodgin/decoding options</param>
public unsafe LZMAStream(Stream stream, CompressionMode mode, ref LZMAOptionLZMA opts)
{
fixed (LZMAOptionLZMA* o = &opts) {
Init(stream, mode, o);
}
}
public static extern unsafe LZMAStatus lzma_alone_encoder(LZMAStreamNative *strm, ref LZMAOptionLZMA options);
