Zlib

Zlib bindings for Julia.

Note: This library is currently maintained, but should be considered deprecated in favor of Libz.jl, which is in every way better.

This library provides a compress and decompress function that work as follows.

Basic API

# Compress data, ouputting a Vector{UInt8} where data is either a Vector{UInt8}
# or an AbstractString.
compress(data)

# Compress at a particular level in [1, 9]
compress("Hello world", 5)

# Decompress to a Vector{UInt8} where data is either a Vector{UInt8} or an
# AbstractString.
decompress(data)

Stream API

Incremental compression or decompression can be performed with the Reader and Writer types which both derive IO, and can be used with most functions that operate on streams.

Reader(io::IO, raw::Bool=false, bufsize::Int=4096)

• io source from which compressed data should be read
• raw true if the data is in the raw deflate format.
• bufsize how much input data to operate on at a time

Writer(io::IO, level::Integer, gzip::Bool=false, raw::Bool=false)

• io source to which compressed data should be written
• level compression level in [1,9]
• gzip true if output should be in the gzip format
• raw true if output is in the raw deflate format.

crc32

crc32(data::Vector{UInt8}, crc::Integer=0) crc32(data::AbstractString, crc::Integer=0)

Compute and return the 32-bit cycle redundancy check on data, updating a running value crc.

# E.g.
crc32("hello")

0x3610a686