internal static extern ZLibNative.ErrorCode DeflateInit2_(
ref ZLibNative.ZStream stream,
ZLibNative.CompressionLevel level,
ZLibNative.CompressionMethod method,
int windowBits,
int memLevel,
ZLibNative.CompressionStrategy strategy);
private void DeflateInit(ZLibNative.CompressionLevel compressionLevel, int windowBits, int memLevel,
ZLibNative.CompressionStrategy strategy)
{
ZErrorCode errC;
try
{
errC = ZLibNative.CreateZLibStreamForDeflate(out _zlibStream, compressionLevel,
windowBits, memLevel, strategy);
}
catch (Exception cause)
{
throw new ZLibException(SR.ZLibErrorDLLLoadError, cause);
}
switch (errC)
{
case ZErrorCode.Ok:
return;
case ZErrorCode.MemError:
throw new ZLibException(SR.ZLibErrorNotEnoughMemory, "deflateInit2_", (int)errC, _zlibStream.GetErrorMessage());
case ZErrorCode.VersionError:
throw new ZLibException(SR.ZLibErrorVersionMismatch, "deflateInit2_", (int)errC, _zlibStream.GetErrorMessage());
case ZErrorCode.StreamError:
throw new ZLibException(SR.ZLibErrorIncorrectInitParameters, "deflateInit2_", (int)errC, _zlibStream.GetErrorMessage());
default:
throw new ZLibException(SR.ZLibErrorUnexpected, "deflateInit2_", (int)errC, _zlibStream.GetErrorMessage());
}
}
internal Deflater(CompressionLevel compressionLevel, int windowBits)
{
Debug.Assert(windowBits >= minWindowBits && windowBits <= maxWindowBits);
ZLibNative.CompressionLevel zlibCompressionLevel;
int memLevel;
switch (compressionLevel)
{
// See the note in ZLibNative.CompressionLevel for the recommended combinations.
case CompressionLevel.Optimal:
zlibCompressionLevel = ZLibNative.CompressionLevel.DefaultCompression;
memLevel = ZLibNative.Deflate_DefaultMemLevel;
break;
case CompressionLevel.Fastest:
zlibCompressionLevel = ZLibNative.CompressionLevel.BestSpeed;
memLevel = ZLibNative.Deflate_DefaultMemLevel;
break;
case CompressionLevel.NoCompression:
zlibCompressionLevel = ZLibNative.CompressionLevel.NoCompression;
memLevel = ZLibNative.Deflate_NoCompressionMemLevel;
break;
default:
throw new ArgumentOutOfRangeException(nameof(compressionLevel));
}
ZLibNative.CompressionStrategy strategy = ZLibNative.CompressionStrategy.DefaultStrategy;
DeflateInit(zlibCompressionLevel, windowBits, memLevel, strategy);
}
internal static unsafe partial ZLibNative.ErrorCode DeflateInit2_(
ZLibNative.ZStream *stream,
ZLibNative.CompressionLevel level,
ZLibNative.CompressionMethod method,
int windowBits,
int memLevel,
ZLibNative.CompressionStrategy strategy);
internal DeflaterZLib(CompressionLevel compressionLevel)
{
ZLibNative.CompressionLevel zlibCompressionLevel;
int memLevel;
switch (compressionLevel)
{
// See the note in ZLibNative.CompressionLevel for the recommended combinations.
case CompressionLevel.Optimal:
zlibCompressionLevel = ZLibNative.CompressionLevel.BestCompression;
memLevel = ZLibNative.Deflate_DefaultMemLevel;
break;
case CompressionLevel.Fastest:
zlibCompressionLevel = ZLibNative.CompressionLevel.BestSpeed;
memLevel = ZLibNative.Deflate_DefaultMemLevel;
break;
case CompressionLevel.NoCompression:
zlibCompressionLevel = ZLibNative.CompressionLevel.NoCompression;
memLevel = ZLibNative.Deflate_NoCompressionMemLevel;
break;
default:
throw new ArgumentOutOfRangeException("compressionLevel");
}
int windowBits = ZLibNative.Deflate_DefaultWindowBits;
ZLibNative.CompressionStrategy strategy = ZLibNative.CompressionStrategy.DefaultStrategy;
DeflateInit(zlibCompressionLevel, windowBits, memLevel, strategy);
}
internal static unsafe ZLibNative.ErrorCode DeflateInit2_(
ref ZLibNative.ZStream stream,
ZLibNative.CompressionLevel level,
ZLibNative.CompressionMethod method,
int windowBits,
int memLevel,
ZLibNative.CompressionStrategy strategy)
{
fixed(byte *versionString = &ZLibVersion[0])
fixed(ZLibNative.ZStream * streamBytes = &stream)
{
byte *pBytes = (byte *)streamBytes;
return((ZLibNative.ErrorCode)deflateInit2_(pBytes, (int)level, (int)method, (int)windowBits, (int)memLevel, (int)strategy, versionString, sizeof(ZLibNative.ZStream)));
}
}
internal Deflater(CompressionLevel compressionLevel, int windowBits)
{
Debug.Assert(windowBits >= minWindowBits && windowBits <= maxWindowBits);
ZLibNative.CompressionLevel zlibCompressionLevel;
int memLevel;
switch (compressionLevel)
{
// See the note in ZLibNative.CompressionLevel for the recommended combinations.
case CompressionLevel.Optimal:
zlibCompressionLevel = ZLibNative.CompressionLevel.DefaultCompression;
memLevel = ZLibNative.Deflate_DefaultMemLevel;
break;
case CompressionLevel.Fastest:
zlibCompressionLevel = ZLibNative.CompressionLevel.BestSpeed;
memLevel = ZLibNative.Deflate_DefaultMemLevel;
break;
case CompressionLevel.NoCompression:
zlibCompressionLevel = ZLibNative.CompressionLevel.NoCompression;
memLevel = ZLibNative.Deflate_NoCompressionMemLevel;
break;
default:
throw new ArgumentOutOfRangeException(nameof(compressionLevel));
}
ZLibNative.CompressionStrategy strategy = ZLibNative.CompressionStrategy.DefaultStrategy;
ZErrorCode errC;
try
{
errC = ZLibNative.CreateZLibStreamForDeflate(out _zlibStream, zlibCompressionLevel,
windowBits, memLevel, strategy);
}
catch (Exception cause)
{
throw new ZLibException(SR.ZLibErrorDLLLoadError, cause);
}
switch (errC)
{
case ZErrorCode.Ok:
return;
case ZErrorCode.MemError:
throw new ZLibException(SR.ZLibErrorNotEnoughMemory, "deflateInit2_", (int)errC, _zlibStream.GetErrorMessage());
case ZErrorCode.VersionError:
throw new ZLibException(SR.ZLibErrorVersionMismatch, "deflateInit2_", (int)errC, _zlibStream.GetErrorMessage());
case ZErrorCode.StreamError:
throw new ZLibException(SR.ZLibErrorIncorrectInitParameters, "deflateInit2_", (int)errC, _zlibStream.GetErrorMessage());
default:
throw new ZLibException(SR.ZLibErrorUnexpected, "deflateInit2_", (int)errC, _zlibStream.GetErrorMessage());
}
}
private void DeflateInit(ZLibNative.CompressionLevel compressionLevel, Int32 windowBits, Int32 memLevel, ZLibNative.CompressionStrategy strategy)
{
var errorCode = ZLibNative.CreateZLibStreamForDeflate(out m_handle, compressionLevel, windowBits, memLevel, strategy);
switch (errorCode)
{
case ZLibNative.ErrorCode.Ok:
return;
case ZLibNative.ErrorCode.MemError:
throw new IOException("The underlying compression routine could not reserve sufficient memory.");
case ZLibNative.ErrorCode.VersionError:
throw new IOException("The version of the underlying compression routine does not match expected version.");
case ZLibNative.ErrorCode.StreamError:
throw new IOException("The underlying compression routine received incorrect initialization parameters.");
default:
throw new IOException($"The underlying compression routine returned an unexpected error code {errorCode}.");
}
}
public ZLibNative.ErrorCode DeflateInit2_(ZLibNative.CompressionLevel level, int windowBits, int memLevel, ZLibNative.CompressionStrategy strategy)
{
this.EnsureNotDisposed();
this.EnsureState(ZLibNative.ZLibStreamHandle.State.NotInitialized);
bool success = false;
RuntimeHelpers.PrepareConstrainedRegions();
ZLibNative.ErrorCode errorCode;
try
{
}
finally
{
errorCode = ZLibNative.ZLibStreamHandle.NativeZLibDLLStub.deflateInit2_Delegate(ref this.zStream, level, ZLibNative.CompressionMethod.Deflated, windowBits, memLevel, strategy, "1.2.3", Marshal.SizeOf((object)this.zStream));
this.initializationState = ZLibNative.ZLibStreamHandle.State.InitializedForDeflate;
ZLibNative.ZLibStreamHandle.zlibLibraryHandle.DangerousAddRef(ref success);
}
return(errorCode);
}
public static ZLibNative.ErrorCode CreateZLibStreamForDeflate(out ZLibNative.ZLibStreamHandle zLibStreamHandle, ZLibNative.CompressionLevel level, int windowBits, int memLevel, ZLibNative.CompressionStrategy strategy)
{
zLibStreamHandle = new ZLibNative.ZLibStreamHandle();
return(zLibStreamHandle.DeflateInit2_(level, windowBits, memLevel, strategy));
}
