protected DeflateStream(Stream baseStream, ZLibDecompressOptions decompOpts, Format format)
{
ZLibInit.Manager.EnsureLoaded();
BaseStream = baseStream ?? throw new ArgumentNullException(nameof(baseStream));
_mode = Mode.Decompress;
_disposed = false;
// Check and set decompress options
_leaveOpen = decompOpts.LeaveOpen;
_bufferSize = CheckBufferSize(decompOpts.BufferSize);
_workBuf = new byte[_bufferSize];
int windowBits = CheckFormatWindowBits(decompOpts.WindowBits, _mode, format);
// Prepare and init ZStream
switch (ZLibInit.Lib.PlatformLongSize)
{
case PlatformLongSize.Long32:
{
_zs32 = new ZStreamL32();
_zsPin = GCHandle.Alloc(_zs32, GCHandleType.Pinned);
ZLibRet ret = ZLibInit.Lib.L32.InflateInit(_zs32, windowBits);
ZLibException.CheckReturnValue(ret, _zs32);
break;
}
case PlatformLongSize.Long64:
{
_zs64 = new ZStreamL64();
_zsPin = GCHandle.Alloc(_zs64, GCHandleType.Pinned);
ZLibRet ret = ZLibInit.Lib.L64.InflateInit(_zs64, windowBits);
ZLibException.CheckReturnValue(ret, _zs64);
break;
}
default:
throw new PlatformNotSupportedException();
}
}
internal ZLibRet InflateInit(ZStreamL64 strm, int windowBits)
{
string zlibVer = Lib.ZLibVersion();
return(InflateInit2(strm, windowBits, zlibVer, Marshal.SizeOf <ZStreamL64>()));
}