ZLibCodec class

The ZLibCodec encodes raw bytes to ZLib compressed bytes and decodes ZLib compressed bytes to raw bytes.



ZLibCodec({int level: ZLibOption.defaultLevel, int windowBits: ZLibOption.defaultWindowBits, int memLevel: ZLibOption.defaultMemLevel, int strategy: ZLibOption.strategyDefault, List<int> dictionary: null, bool raw: false, bool gzip: false })


decoder ZLibDecoder
Get a ZLibDecoder for decoding ZLib compressed data.
read-only, override
dictionary List<int>
Initial compression dictionary. [...]
encoder ZLibEncoder
Get a ZLibEncoder for encoding to ZLib compressed data.
read-only, override
gzip bool
When true, GZip frames will be added to the compressed data.
level int
The compression-level can be set in the range of -1..9, with 6 being the default compression level. Levels above 6 will have higher compression rates at the cost of more CPU and memory usage. Levels below 6 will use less CPU and memory at the cost of lower compression rates.
memLevel int
Specifies how much memory should be allocated for the internal compression state. 1 uses minimum memory but is slow and reduces compression ratio; 9 uses maximum memory for optimal speed. The default value is 8. [...]
raw bool
When true, deflate generates raw data with no zlib header or trailer, and will not compute an adler32 check value
strategy int
Tunes the compression algorithm. Use the value strategyDefault for normal data, strategyFiltered for data produced by a filter (or predictor), strategyHuffmanOnly to force Huffman encoding only (no string match), or strategyRle to limit match distances to one (run-length encoding).
windowBits int
Base two logarithm of the window size (the size of the history buffer). It should be in the range 8..15. Larger values result in better compression at the expense of memory usage. The default value is 15
hashCode int
The hash code for this object. [...]
read-only, inherited
inverted Codec<List<int>, List<int>>
Inverts this. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


decode(List<int> encoded) List<int>
Decodes encoded data. [...]
encode(List<int> input) List<int>
Encodes input. [...]
fuse<R>(Codec<List<int>, R> other) Codec<List<int>, R>
Fuses this with other. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
toString() String
Returns a string representation of this object.


operator ==(dynamic other) bool
The equality operator. [...]