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());
}
}
private void InflateInit(int windowBits)
{
ZLibNative.ErrorCode error;
try
{
error = ZLibNative.CreateZLibStreamForInflate(out _zlibStream, windowBits);
}
catch (Exception exception) // could not load the ZLib dll
{
throw new ZLibException("SR.ZLibErrorDLLLoadError", exception);
}
switch (error)
{
case ZLibNative.ErrorCode.Ok: // Successful initialization
return;
case ZLibNative.ErrorCode.MemError: // Not enough memory
throw new ZLibException("SR.ZLibErrorNotEnoughMemory", "inflateInit2_", (int)error, _zlibStream.GetErrorMessage());
case ZLibNative.ErrorCode.VersionError: //zlib library is incompatible with the version assumed
throw new ZLibException("SR.ZLibErrorVersionMismatch", "inflateInit2_", (int)error, _zlibStream.GetErrorMessage());
case ZLibNative.ErrorCode.StreamError: // Parameters are invalid
throw new ZLibException("SR.ZLibErrorIncorrectInitParameters", "inflateInit2_", (int)error, _zlibStream.GetErrorMessage());
default:
throw new ZLibException("SR.ZLibErrorUnexpected", "inflateInit2_", (int)error, _zlibStream.GetErrorMessage());
}
}
internal static unsafe ZLibNative.ErrorCode DeflateEnd(ref ZLibNative.ZStream stream)
{
fixed (ZLibNative.ZStream* streamBytes = &stream)
{
byte* pBytes = (byte*) streamBytes;
return (ZLibNative.ErrorCode) deflateEnd(pBytes);
}
}
internal static unsafe ZLibNative.ErrorCode Deflate(ref ZLibNative.ZStream stream,
ZLibNative.FlushCode flush)
{
fixed (ZLibNative.ZStream* streamBytes = &stream)
{
byte* pBytes = (byte*) streamBytes;
return (ZLibNative.ErrorCode) deflate(pBytes, (int) flush);
}
}
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)
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 static unsafe ZLibNative.ErrorCode InflateInit2_(
ref ZLibNative.ZStream stream,
int windowBits)
{
fixed (byte* versionString = ZLibVersion)
fixed (ZLibNative.ZStream* streamBytes = &stream)
{
byte* pBytes = (byte*) streamBytes;
return
(ZLibNative.ErrorCode)
inflateInit2_(pBytes, (int) windowBits, versionString, sizeof(ZLibNative.ZStream));
}
}
