Inflate

Zlib's inflate algorithm

struct Inflate {

ZlibFormat format;

GzHeaderDg gzHeaderDg;

int windowBits;

class Stream;

Stream initialize();

}

Members

Classes

Stream class Stream: Undocumented in source.

Functions

end void end(Stream stream): Undocumented in source. Be warned that the author may not have intended to support it.
initialize Stream initialize(): Undocumented in source. Be warned that the author may not have intended to support it.
process Flag!"streamEnded" process(Stream stream, Flag!"lastChunk" ): Undocumented in source. Be warned that the author may not have intended to support it.
reset void reset(Stream stream): Undocumented in source. Be warned that the author may not have intended to support it.

Variables

format ZlibFormat format;: Which format to use for the deflated stream. In case ZlibFormat.gz, the gzHeader field will be written if set.
gzHeaderDg GzHeaderDg gzHeaderDg;: If set, will be assigned to the Gz header once it is known
windowBits int windowBits;: Advanced parameters See zlib's documentation of deflateInit2. windowBits can be 0 if format is ZlibFormat.zlib. Otherwise it must be between 9 and 15 included.

Examples

import test.util;
import std.array : join;

auto def = Deflate.init;
auto inf = Inflate.init;

const len = 100_000;
const phrase = cast(const(ubyte)[]) "Some very repetitive phrase.\n";
const input = generateRepetitiveData(len, phrase).join();

// deflating
const squized = only(input).squiz(def).join();

// re-inflating
const output = only(squized).squiz(inf).join();

assert(squized.length < input.length);
assert(output == input);

// for such long and repetitive data, ratio is around 0.3%
const ratio = cast(double) squized.length / cast(double) input.length;
assert(ratio < 0.004);

import test.util;
import std.array : join;

const len = 100_000;
const phrase = cast(const(ubyte)[]) "Some very repetitive phrase.\n";
const input = generateRepetitiveData(len, phrase).join();

GzHeader inHead;
inHead.mtime = Clock.currTime;
inHead.os = GzHeader.Os.fatFs;
inHead.text = Yes.text;
inHead.filename = "boring.txt";
inHead.comment = "A very boring file";

// deflating
const squized = only(input)
    .deflateGz(inHead)
    .join();

// re-inflating
GzHeader outHead;
int numCalls;
void setOutHead(GzHeader gzh)
{
    outHead = gzh;
    numCalls++;
}

const output = only(squized)
    .inflateGz(&setOutHead)
    .join();

assert(squized.length < input.length);
assert(output == input);
assert(inHead == outHead);
assert(numCalls == 1);

import test.util;
import std.array : join;

const len = 100_000;
const phrase = cast(const(ubyte)[]) "Some very repetitive phrase.\n";
const input = generateRepetitiveData(len, phrase).join();

// deflating
const squized = only(input)
    .deflateRaw()
    .join();

// re-inflating
const output = only(squized)
    .inflateRaw()
    .join();

assert(squized.length < input.length);
assert(output == input);

Inflate

Members

Classes

Functions

Variables

Examples

Meta

Source