std.zlib

Compress/decompress data using the zlib library.

Members

Classes

Compress class Compress: Used when the data to be compressed is not all in one buffer.
UnCompress class UnCompress: Used when the data to be decompressed is not all in one buffer.
ZlibException class ZlibException: Errors throw a ZlibException.

Enums

HeaderFormat enum HeaderFormat: the header format the compressed stream is wrapped in

Functions

adler32 uint adler32(uint adler, const(void)[] buf): Compute the Adler-32 checksum of a buffer's worth of data.
compress ubyte[] compress(const(void)[] srcbuf, int level)
ubyte[] compress(const(void)[] srcbuf): Compress data
crc32 uint crc32(uint crc, const(void)[] buf): Compute the CRC32 checksum of a buffer's worth of data.
uncompress void[] uncompress(const(void)[] srcbuf, size_t destlen, int winbits): Decompresses the data in srcbuf[].

Examples

If you have a small buffer you can use compress and uncompress directly.

import std.zlib;

auto src =
"the quick brown fox jumps over the lazy dog\r
 the quick brown fox jumps over the lazy dog\r";

ubyte[] dst;
ubyte[] result;

dst = compress(src);
result = cast(ubyte[]) uncompress(dst);
assert(result == src);

When the data to be compressed doesn't fit in one buffer, use Compress and UnCompress.

import std.zlib;
import std.stdio;
import std.conv : to;
import std.algorithm.iteration : map;

UnCompress decmp = new UnCompress;
foreach (chunk; stdin.byChunk(4096).map!(x => decmp.uncompress(x)))
{
    chunk.to!string.write;
}

References: Wikipedia

std.zlib

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