---
-- Zlib compression and decompression library
--
-- From https://github.com/LuaDist/lzlib
-- @author Tiago Dionizio <tiago.dionizio@gmail.com>
-- @copyright The MIT License (MIT); Copyright Tiago Dionizio (tiago.dionizio@gmail.com)
module "zlib"

-- NSEdoc derived from lzlib's README

--- returns zlib version
-- @return the zlib version
function version()

--- Compute an adler32 checksum
--
-- Without any parameters, returns the initial adler32 value.
--
-- Call to update the adler32 value, adler is the current value, buffer is passed
-- to adler32 zlib function and the updated value is returned.
-- @param adler An integer, the result of a previous call to <code>adler32</code>
-- @param buffer A string, over which to compute the adler32 checksum.
-- @return The adler32 checksum result.
function adler32(adler, buffer)

--- Compute a crc32 checksum
--
-- Without any parameters, returns the initial crc32 value.
--
-- Call to update the crc32 value, crc is the current value, buffer is passed
-- to crc32 zlib function and the updated value is returned.
-- @param crc An integer, the result of a previous call to <code>crc32</code>
-- @param buffer A string, over which to compute the crc32 checksum.
-- @return The crc32 checksum result.
function crc32(crc, buffer)

--- Return a string containing the compressed buffer according to the given parameters.
--
-- All of the parameters besides buffer are optional. The zlib library sets the
-- default values, which are usually equivalent to
-- <code>compress(buffer, 6, Z_DEFLATED, 15, 8, Z_DEFAULT_STRATEGY)</code>
-- @param buffer String to compress
-- @param level Optional integer corresponding to compression level, 0-9
-- @param method Optional integer corresponding to compression method
-- @param windowBits Optional integer, the base-2 logarithm of the maximum window size. Default: 15
-- @param memLevel Optional integer corresponding to memory use and therefore speed
-- @param strategy Optional integer corresponding to compression strategy
function compress(buffer, level, method, windowBits, memLevel, strategy)

--- Return the decompressed stream after processing the given buffer.
--
-- If windowBits is negative, this function decompresses raw deflate data without header.
-- @param buffer String containing DEFLATE-compressed data
-- @param windowBits Optional integer, the base-2 logarithm of the maximum window size. Default: 15
function decompress(buffer, windowBits)

--- Return a deflate stream.
--
-- This stream is a file-like object that can be used to write compressed
-- (deflated) data to some sink stream. If the sink stream is a table or
-- object, it must have a <code>write</code> method. Otherwise, it must be a
-- function that will be called with data to write (e.g.
-- <code>socket.send</code>).
-- @param sink The location where compressed data will be written
-- @param level Optional integer corresponding to compression level, 0-9
-- @param method Optional integer corresponding to compression method
-- @param windowBits Optional integer, the base-2 logarithm of the maximum window size. Default: 15
-- @param memLevel Optional integer corresponding to memory use and therefore speed
-- @param strategy Optional integer corresponding to compression strategy
-- @param dictionary Optional string corresponding to initial compression dictionary
function deflate(sink, level, method, windowBits, memLevel, strategy, dictionary)

--- Read from an inflate stream
--
-- @param how A number of bytes to read, or "*l" (read until newline), or "*a" (read the whole stream). Default: "*l"
-- @return The bytes read, or nil on EOF.
function inflate_stream:read(how)

--- Return iterator that returns a line each time it is called, or nil on end
--  of file.
--  @return An iterator suitable for use with <code>for</code>
function inflate_stream:lines()

--- Close the stream.
--@return True, or false on error
--@return An error string
function stream:close()

--- Return an inflate stream.
--
-- This stream is a file-like object that can be used to read decompressed
-- (inflated) data from some source stream. If the source stream is a table or
-- object, it must have a <code>read</code> method. Otherwise, it must be a
-- function that will be called to get more compressed data.
-- @param source The location where compressed data will be read from
-- @param windowBits Optional integer, the base-2 logarithm of the maximum window size. Default: 15
-- @param dictionary Optional string corresponding to initial compression dictionary
-- @return an inflate stream.
function inflate(source, windowBits, dictionary)

--- Write each parameter into the stream
-- @param ... any number of strings to write
-- @return True, or false on error
-- @return Error string on error
function deflate_stream:write(...)

--- Flush output for deflate streams.
-- @param value One of 'sync', 'full', or 'finish'
-- @return True, or false on error
-- @return Error string on error
function deflate_stream:flush(value)