ddn.compressor.deflate_raw

Provider for raw DEFLATE compression format (RFC 1951). This implements DEFLATE without any container/wrapper (no zlib or gzip headers).

Uses the pure D zlib implementation (ddn.compressor.zlib) with negative windowBits to produce raw DEFLATE streams.

Copyright

BSD-3-Clause

class DeflateRawStdZlibCompressor DeflateRawStdZlibDecompressor

fn makeDeflateRawStdZlibCompressor makeDeflateRawStdZlibDecompressor toZFlush toZLevel toZStrategy

Module Initializers 1

shared static this()

Types 2

classDeflateRawStdZlibCompressor : Compressor

Raw DEFLATE compressor using ddn.compressor.zlib with negative windowBits. Produces raw DEFLATE streams without zlib/gzip headers (RFC 1951).

Fields

CompressionOptions _opts

z_stream _zs

OutputSink _sink

ubyte[] _input

ubyte[] _output

int _windowBits

ulong _bytesIn

ulong _bytesOut

bool _dictSet

bool _finished

Methods

CompressionOptions options() @property constReturn the options used to create this compressor.

void setOutputSink(OutputSink sink)Set the output sink delegate that will receive produced compressed chunks.

void setProgressCallback(ProgressCallback callback)Set an optional progress callback.

ulong bytesInTotal() @property constTotal uncompressed bytes consumed since last reset.

ulong bytesOutTotal() @property constTotal compressed bytes produced since last reset.

void write(const(ubyte)[] data)Write uncompressed data to the compressor.

void flush(FlushMode mode = FlushMode.SYNC)Flush pending output with given flush mode.

void finish()Finish the stream and finalize compression.

void reset()Reset the compressor to initial state.

bool setDictionary(const(ubyte)[] dict)Set compression dictionary for better compression ratios.

bool isFinished() @property constReturns true if finish() has been called and the stream is closed for further writes.

void compressInternal(int flush)

Constructors

this(CompressionOptions opts)Create a raw DEFLATE compressor with provided options.

Destructors

~thisEnsure zlib stream is ended.

classDeflateRawStdZlibDecompressor : Decompressor

Raw DEFLATE decompressor using ddn.compressor.zlib with negative windowBits. Decompresses raw DEFLATE streams without zlib/gzip headers (RFC 1951).

Fields

DecompressionOptions _opts

z_stream _zs

OutputSink _sink

ubyte[] _input

ubyte[] _output

int _windowBits

ulong _bytesIn

ulong _bytesOut

bool _dictSet

bool _finished

Methods

DecompressionOptions options() @property constReturn the options used to create this decompressor.

void setOutputSink(OutputSink sink)Set the output sink delegate that will receive produced decompressed chunks.

void setProgressCallback(ProgressCallback callback)Set an optional progress callback.

ulong bytesInTotal() @property constTotal compressed bytes consumed since last reset.

ulong bytesOutTotal() @property constTotal decompressed bytes produced since last reset.

void write(const(ubyte)[] data)Write compressed data to the decompressor.

void finish()Finish decompression and finalize.

void reset()Reset the decompressor to initial state.

bool setDictionary(const(ubyte)[] dict)Set decompression dictionary if required by the compressed stream.

bool isFinished() @property constReturns true if finish() has been called and the stream is closed for further writes.

void decompressInternal(int flush)

Constructors

this(DecompressionOptions opts)Create a raw DEFLATE decompressor with provided options.

Destructors

~this

Functions 5

fnint toZLevel(CompressionOptions opts)Map ddn CompressionLevel to zlib level.

fnint toZStrategy(CompressionOptions opts)Map ddn CompressionStrategy to zlib strategy.

fnint toZFlush(FlushMode mode)Map ddn FlushMode to zlib flush constant.

fnCompressor makeDeflateRawStdZlibCompressor(CompressionOptions opts)Factory function that constructs a raw DEFLATE compressor.

fnDecompressor makeDeflateRawStdZlibDecompressor(DecompressionOptions opts)Factory function that constructs a raw DEFLATE decompressor.