Zlib Namespace Reference

Classes
class	DeflateManager
class	DeflateStream
	A class for compressing and decompressing streams using the Deflate algorithm. More...
class	InflateBlocks
class	InternalInflateConstants
class	InflateCodes
class	InflateManager
class	InfTree
class	ZlibException
	A general purpose exception class for exceptions in the Zlib library. More...
class	SharedUtils
class	InternalConstants
class	StaticTree
class	Adler
	Computes an Adler-32 checksum. More...
class	ZlibBaseStream
class	ZlibCodec
	Encoder and Decoder for ZLIB and DEFLATE (IETF RFC1950 and RFC1951). More...
class	ZlibConstants
	A bunch of constants used in the Zlib interface. More...
class	Tree

Enumerations

enum Zlib.BlockState

package

Enumerator
NeedMore
BlockDone
FinishStarted
FinishDone

enum Zlib.CompressionLevel

The compression level to be used when using a DeflateStream or ZlibStream with CompressionMode.Compress.

Enumerator
None	None means that the data will be simply stored, with no change at all. If you are producing ZIPs for use on Mac OSX, be aware that archives produced with CompressionLevel.None cannot be opened with the default zip reader. Use a different CompressionLevel.
Level0	Same as None.
BestSpeed	The fastest but least effective compression.
Level1	A synonym for BestSpeed.
Level2	A little slower, but better, than level 1.
Level3	A little slower, but better, than level 2.
Level4	A little slower, but better, than level 3.
Level5	A little slower than level 4, but with better compression.
Default	The default compression level, with a good balance of speed and compression efficiency.
Level6	A synonym for Default.
Level7	Pretty good compression!
Level8	Better compression than Level7!
BestCompression	The "best" compression, where best means greatest reduction in size of the input data stream. This is also the slowest compression.
Level9	A synonym for BestCompression.

enum Zlib.CompressionMode

An enum to specify the direction of transcoding - whether to compress or decompress.

Enumerator
Compress	Used to specify that the stream should compress the data.
Decompress	Used to specify that the stream should decompress the data.

enum Zlib.CompressionStrategy

package

Describes options for how the compression algorithm is executed. Different strategies work better on different sorts of data. The strategy parameter can affect the compression ratio and the speed of compression but not the correctness of the compresssion.

Enumerator
Default	The default strategy is probably the best for normal data.
Filtered	The Filtered strategy is intended to be used most effectively with data produced by a filter or predictor. By this definition, filtered data consists mostly of small values with a somewhat random distribution. In this case, the compression algorithm is tuned to compress them better. The effect of Filtered is to force more Huffman coding and less string matching; it is a half-step between Default and HuffmanOnly.
HuffmanOnly	Using HuffmanOnly will force the compressor to do Huffman encoding only, with no string matching.

enum Zlib.DeflateFlavor

package

Enumerator
Store
Fast
Slow

enum Zlib.FlushType

package

Describes how to flush the current deflate operation.

The different FlushType values are useful when using a Deflate in a streaming application.

Enumerator
None	No flush at all.
Partial	Closes the current block, but doesn't flush it to the output. Used internally only in hypothetical scenarios. This was supposed to be removed by Zlib, but it is still in use in some edge cases.
Sync	Use this during compression to specify that all pending output should be flushed to the output buffer and the output should be aligned on a byte boundary. You might use this in a streaming communication scenario, so that the decompressor can get all input data available so far. When using this with a ZlibCodec, AvailableBytesIn will be zero after the call if enough output space has been provided before the call. Flushing will degrade compression and so it should be used only when necessary.
Full	Use this during compression to specify that all output should be flushed, as with FlushType.Sync, but also, the compression state should be reset so that decompression can restart from this point if previous compressed data has been damaged or if random access is desired. Using FlushType.Full too often can significantly degrade the compression.
Finish	Signals the end of the compression/decompression stream.

enum Zlib.ZlibStreamFlavor

package

Enumerator
ZLIB
DEFLATE
GZIP