--- Pack and unpack binary data.
-- \n\n
-- A problem script authors often face is the necessity of encoding values
-- into binary data. For example after analyzing a protocol the starting 
-- point to write a script could be a hex dump, which serves as a preamble
-- to every sent packet. Although it is possible work with the 
-- functionality Lua provides, it's not very convenient. Therefore NSE includes
-- Binlib, based on lpack (http://www.tecgraf.puc-rio.br/~lhf/ftp/lua/)
-- by Luiz Henrique de Figueiredo.
-- \n\n
-- The Binlib functions take a format string to encode and decode binary
-- data. Packing and unpacking are controlled by the following operator
-- characters:\n
-- H: hex string\n
-- B: bit string\n
-- x: null byte\n
-- z: zero-terminated string\n
-- p: string preceded by 1-byte integer length\n
-- P: string preceded by 2-byte integer length\n
-- a: string preceded by 4-byte integer length\n
-- A: string\n
-- f: float\n
-- d: double\n
-- n: Lua number\n
-- c: char (1-byte integer)\n
-- C: byte = unsigned char (1-byte unsigned integer)\n
-- s: short (2-byte integer)\n
-- S: unsigned short (2-byte unsigned integer)\n
-- i: int (4-byte integer)\n
-- I: unsigned int (4-byte unsigned integer)\n
-- l: long (8-byte integer)\n
-- L: unsigned long (8-byte unsigned integer)\n
-- <: little endian modifier\n
-- >: big endian modifier\n
-- =: native endian modifier
-- \n\n
-- Note that the endian operators work as modifiers to all the 
-- characters following them in the format string.

module "bin"


--- Returns a binary packed string.
-- \n\n
-- The format string describes how the parameters (p1, ...) will be interpreted.
-- Numerical values following operators stand for operator repetitions and need
-- an according amount of parameters. Operators expect appropriate parameter
-- types.
-- \n\n
-- Note: on Windows packing of 64 bit values > 2^63 currently
-- results in packing exactly 2^63.
--@param format Format string, used to pack following arguments.
--@param ... The values to pack.
--@return String containing packed data.
function bin.pack(format, ...)


--- Returns values read from the binary packed data string.
-- \n\n
-- The first return value of this function is the position at which unpacking
-- stopped. This can be used as init value for subsequent calls. The following
-- results are the values according to the format string. Numerical values in
-- the format string are interpreted as repetitions like in pack, except if used
-- with A, B or H, in which cases the number tells unpack how many bytes to
-- read. Unpack stops if either the format string or the binary data string are
-- exhausted. 
--@param format Format string, used to unpack values out of data string.
--@param data String containing packed data.
--@param init Optional starting position within the string.
--@return Position in the data string where unpacking stopped.
--@return All unpacked values.
function bin.unpack(format, data, init)