902 lines
29 KiB
Lua
902 lines
29 KiB
Lua
--
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-- lua-MessagePack : <https://fperrad.frama.io/lua-MessagePack/>
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--
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local r, jit = pcall(require, 'jit')
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if not r then
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jit = nil
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end
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local SIZEOF_NUMBER = string.pack and #string.pack('n', 0.0) or 8
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local maxinteger
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local mininteger
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if not jit and _VERSION < 'Lua 5.3' then
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-- Lua 5.1 & 5.2
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local loadstring = loadstring or load
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local luac = string.dump(loadstring "a = 1")
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local header = { luac:byte(1, 12) }
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SIZEOF_NUMBER = header[11]
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end
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local assert = assert
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local error = error
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local pairs = pairs
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local pcall = pcall
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local setmetatable = setmetatable
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local tostring = tostring
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local type = type
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local char = require'string'.char
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local format = require'string'.format
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local floor = require'math'.floor
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local tointeger = require'math'.tointeger or floor
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local frexp = require'math'.frexp or require'mathx'.frexp
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local ldexp = require'math'.ldexp or require'mathx'.ldexp
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local huge = require'math'.huge
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local tconcat = require'table'.concat
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local _ENV = nil
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local m = {}
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--[[ debug only
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local function hexadump (s)
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return (s:gsub('.', function (c) return format('%02X ', c:byte()) end))
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end
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m.hexadump = hexadump
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--]]
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local function argerror (caller, narg, extramsg)
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error("bad argument #" .. tostring(narg) .. " to "
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.. caller .. " (" .. extramsg .. ")")
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end
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local function typeerror (caller, narg, arg, tname)
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argerror(caller, narg, tname .. " expected, got " .. type(arg))
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end
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local function checktype (caller, narg, arg, tname)
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if type(arg) ~= tname then
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typeerror(caller, narg, arg, tname)
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end
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end
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local packers = setmetatable({}, {
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__index = function (t, k)
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if k == 1 then return end -- allows ipairs
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error("pack '" .. k .. "' is unimplemented")
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end
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})
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m.packers = packers
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packers['nil'] = function (buffer)
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buffer[#buffer+1] = char(0xC0) -- nil
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end
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packers['boolean'] = function (buffer, bool)
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if bool then
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buffer[#buffer+1] = char(0xC3) -- true
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else
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buffer[#buffer+1] = char(0xC2) -- false
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end
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end
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packers['string_compat'] = function (buffer, str)
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local n = #str
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if n <= 0x1F then
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buffer[#buffer+1] = char(0xA0 + n) -- fixstr
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elseif n <= 0xFFFF then
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buffer[#buffer+1] = char(0xDA, -- str16
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floor(n / 0x100),
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n % 0x100)
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elseif n <= 4294967295.0 then
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buffer[#buffer+1] = char(0xDB, -- str32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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error"overflow in pack 'string_compat'"
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end
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buffer[#buffer+1] = str
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end
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packers['_string'] = function (buffer, str)
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local n = #str
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if n <= 0x1F then
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buffer[#buffer+1] = char(0xA0 + n) -- fixstr
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elseif n <= 0xFF then
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buffer[#buffer+1] = char(0xD9, -- str8
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n)
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elseif n <= 0xFFFF then
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buffer[#buffer+1] = char(0xDA, -- str16
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floor(n / 0x100),
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n % 0x100)
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elseif n <= 4294967295.0 then
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buffer[#buffer+1] = char(0xDB, -- str32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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error"overflow in pack 'string'"
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end
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buffer[#buffer+1] = str
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end
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packers['binary'] = function (buffer, str)
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local n = #str
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if n <= 0xFF then
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buffer[#buffer+1] = char(0xC4, -- bin8
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n)
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elseif n <= 0xFFFF then
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buffer[#buffer+1] = char(0xC5, -- bin16
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floor(n / 0x100),
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n % 0x100)
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elseif n <= 4294967295.0 then
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buffer[#buffer+1] = char(0xC6, -- bin32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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error"overflow in pack 'binary'"
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end
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buffer[#buffer+1] = str
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end
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local set_string = function (str)
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if str == 'string_compat' then
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packers['string'] = packers['string_compat']
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elseif str == 'string' then
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packers['string'] = packers['_string']
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elseif str == 'binary' then
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packers['string'] = packers['binary']
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else
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argerror('set_string', 1, "invalid option '" .. str .."'")
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end
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end
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m.set_string = set_string
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packers['map'] = function (buffer, tbl, n)
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if n <= 0x0F then
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buffer[#buffer+1] = char(0x80 + n) -- fixmap
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elseif n <= 0xFFFF then
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buffer[#buffer+1] = char(0xDE, -- map16
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floor(n / 0x100),
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n % 0x100)
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elseif n <= 4294967295.0 then
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buffer[#buffer+1] = char(0xDF, -- map32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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error"overflow in pack 'map'"
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end
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for k, v in pairs(tbl) do
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packers[type(k)](buffer, k)
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packers[type(v)](buffer, v)
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end
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end
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packers['array'] = function (buffer, tbl, n)
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if n <= 0x0F then
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buffer[#buffer+1] = char(0x90 + n) -- fixarray
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elseif n <= 0xFFFF then
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buffer[#buffer+1] = char(0xDC, -- array16
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floor(n / 0x100),
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n % 0x100)
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elseif n <= 4294967295.0 then
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buffer[#buffer+1] = char(0xDD, -- array32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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error"overflow in pack 'array'"
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end
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for i = 1, n do
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local v = tbl[i]
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packers[type(v)](buffer, v)
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end
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end
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local set_array = function (array)
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if array == 'without_hole' then
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packers['_table'] = function (buffer, tbl)
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local is_map, n, max = false, 0, 0
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for k in pairs(tbl) do
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if type(k) == 'number' and k > 0 then
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if k > max then
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max = k
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end
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else
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is_map = true
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end
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n = n + 1
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end
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if max ~= n then -- there are holes
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is_map = true
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end
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if is_map then
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packers['map'](buffer, tbl, n)
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else
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packers['array'](buffer, tbl, n)
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end
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end
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elseif array == 'with_hole' then
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packers['_table'] = function (buffer, tbl)
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local is_map, n, max = false, 0, 0
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for k in pairs(tbl) do
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if type(k) == 'number' and k > 0 then
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if k > max then
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max = k
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end
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else
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is_map = true
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end
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n = n + 1
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end
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if is_map then
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packers['map'](buffer, tbl, n)
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else
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packers['array'](buffer, tbl, max)
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end
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end
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elseif array == 'always_as_map' then
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packers['_table'] = function(buffer, tbl)
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local n = 0
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for k in pairs(tbl) do
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n = n + 1
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end
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packers['map'](buffer, tbl, n)
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end
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else
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argerror('set_array', 1, "invalid option '" .. array .."'")
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end
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end
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m.set_array = set_array
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packers['table'] = function (buffer, tbl)
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packers['_table'](buffer, tbl)
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end
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packers['unsigned'] = function (buffer, n)
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if n >= 0 then
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if n <= 0x7F then
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buffer[#buffer+1] = char(n) -- fixnum_pos
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elseif n <= 0xFF then
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buffer[#buffer+1] = char(0xCC, -- uint8
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n)
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elseif n <= 0xFFFF then
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buffer[#buffer+1] = char(0xCD, -- uint16
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floor(n / 0x100),
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n % 0x100)
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elseif n <= 4294967295.0 then
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buffer[#buffer+1] = char(0xCE, -- uint32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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buffer[#buffer+1] = char(0xCF, -- uint64
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0, -- only 53 bits from double
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floor(n / 0x1000000000000) % 0x100,
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floor(n / 0x10000000000) % 0x100,
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floor(n / 0x100000000) % 0x100,
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floor(n / 0x1000000) % 0x100,
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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end
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else
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if n >= -0x20 then
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buffer[#buffer+1] = char(0x100 + n) -- fixnum_neg
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elseif n >= -0x80 then
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buffer[#buffer+1] = char(0xD0, -- int8
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0x100 + n)
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elseif n >= -0x8000 then
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n = 0x10000 + n
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buffer[#buffer+1] = char(0xD1, -- int16
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floor(n / 0x100),
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n % 0x100)
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elseif n >= -0x80000000 then
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n = 4294967296.0 + n
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buffer[#buffer+1] = char(0xD2, -- int32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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buffer[#buffer+1] = char(0xD3, -- int64
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0xFF, -- only 53 bits from double
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floor(n / 0x1000000000000) % 0x100,
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floor(n / 0x10000000000) % 0x100,
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floor(n / 0x100000000) % 0x100,
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floor(n / 0x1000000) % 0x100,
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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end
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end
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end
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packers['signed'] = function (buffer, n)
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if n >= 0 then
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if n <= 0x7F then
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buffer[#buffer+1] = char(n) -- fixnum_pos
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elseif n <= 0x7FFF then
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buffer[#buffer+1] = char(0xD1, -- int16
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floor(n / 0x100),
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n % 0x100)
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elseif n <= 0x7FFFFFFF then
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buffer[#buffer+1] = char(0xD2, -- int32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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buffer[#buffer+1] = char(0xD3, -- int64
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0, -- only 53 bits from double
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floor(n / 0x1000000000000) % 0x100,
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floor(n / 0x10000000000) % 0x100,
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floor(n / 0x100000000) % 0x100,
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floor(n / 0x1000000) % 0x100,
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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end
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else
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if n >= -0x20 then
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buffer[#buffer+1] = char(0xE0 + 0x20 + n) -- fixnum_neg
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elseif n >= -0x80 then
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buffer[#buffer+1] = char(0xD0, -- int8
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0x100 + n)
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elseif n >= -0x8000 then
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n = 0x10000 + n
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buffer[#buffer+1] = char(0xD1, -- int16
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floor(n / 0x100),
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n % 0x100)
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elseif n >= -0x80000000 then
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n = 4294967296.0 + n
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buffer[#buffer+1] = char(0xD2, -- int32
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floor(n / 0x1000000),
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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else
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buffer[#buffer+1] = char(0xD3, -- int64
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0xFF, -- only 53 bits from double
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floor(n / 0x1000000000000) % 0x100,
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floor(n / 0x10000000000) % 0x100,
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floor(n / 0x100000000) % 0x100,
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floor(n / 0x1000000) % 0x100,
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floor(n / 0x10000) % 0x100,
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floor(n / 0x100) % 0x100,
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n % 0x100)
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end
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end
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end
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local set_integer = function (integer)
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if integer == 'unsigned' then
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packers['integer'] = packers['unsigned']
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elseif integer == 'signed' then
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packers['integer'] = packers['signed']
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else
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argerror('set_integer', 1, "invalid option '" .. integer .."'")
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end
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end
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m.set_integer = set_integer
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packers['float'] = function (buffer, n)
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local sign = 0
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if n < 0.0 then
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sign = 0x80
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n = -n
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end
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local mant, expo = frexp(n)
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if mant ~= mant then
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buffer[#buffer+1] = char(0xCA, -- nan
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0xFF, 0x88, 0x00, 0x00)
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elseif mant == huge or expo > 0x80 then
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if sign == 0 then
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buffer[#buffer+1] = char(0xCA, -- inf
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0x7F, 0x80, 0x00, 0x00)
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else
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buffer[#buffer+1] = char(0xCA, -- -inf
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0xFF, 0x80, 0x00, 0x00)
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end
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elseif (mant == 0.0 and expo == 0) or expo < -0x7E then
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buffer[#buffer+1] = char(0xCA, -- zero
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sign, 0x00, 0x00, 0x00)
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else
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expo = expo + 0x7E
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mant = floor((mant * 2.0 - 1.0) * ldexp(0.5, 24))
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buffer[#buffer+1] = char(0xCA,
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sign + floor(expo / 0x2),
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(expo % 0x2) * 0x80 + floor(mant / 0x10000),
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floor(mant / 0x100) % 0x100,
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mant % 0x100)
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end
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end
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packers['double'] = function (buffer, n)
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local sign = 0
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if n < 0.0 then
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sign = 0x80
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n = -n
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end
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local mant, expo = frexp(n)
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if mant ~= mant then
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buffer[#buffer+1] = char(0xCB, -- nan
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0xFF, 0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
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elseif mant == huge or expo > 0x400 then
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if sign == 0 then
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buffer[#buffer+1] = char(0xCB, -- inf
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0x7F, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
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else
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buffer[#buffer+1] = char(0xCB, -- -inf
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0xFF, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
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end
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elseif (mant == 0.0 and expo == 0) or expo < -0x3FE then
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buffer[#buffer+1] = char(0xCB, -- zero
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sign, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)
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else
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expo = expo + 0x3FE
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mant = floor((mant * 2.0 - 1.0) * ldexp(0.5, 53))
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buffer[#buffer+1] = char(0xCB,
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sign + floor(expo / 0x10),
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(expo % 0x10) * 0x10 + floor(mant / 0x1000000000000),
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floor(mant / 0x10000000000) % 0x100,
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floor(mant / 0x100000000) % 0x100,
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floor(mant / 0x1000000) % 0x100,
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floor(mant / 0x10000) % 0x100,
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floor(mant / 0x100) % 0x100,
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mant % 0x100)
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end
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end
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local set_number = function (number)
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if number == 'float' then
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packers['number'] = function (buffer, n)
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if floor(n) == n and n < maxinteger and n > mininteger then
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packers['integer'](buffer, n)
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else
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packers['float'](buffer, n)
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end
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end
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elseif number == 'double' then
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packers['number'] = function (buffer, n)
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if floor(n) == n and n < maxinteger and n > mininteger then
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packers['integer'](buffer, n)
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else
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packers['double'](buffer, n)
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end
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end
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else
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argerror('set_number', 1, "invalid option '" .. number .."'")
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end
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end
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m.set_number = set_number
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for k = 0, 4 do
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local n = tointeger(2^k)
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local fixext = 0xD4 + k
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packers['fixext' .. tostring(n)] = function (buffer, tag, data)
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assert(#data == n, "bad length for fixext" .. tostring(n))
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buffer[#buffer+1] = char(fixext,
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tag < 0 and tag + 0x100 or tag)
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buffer[#buffer+1] = data
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end
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end
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packers['ext'] = function (buffer, tag, data)
|
|
local n = #data
|
|
if n <= 0xFF then
|
|
buffer[#buffer+1] = char(0xC7, -- ext8
|
|
n,
|
|
tag < 0 and tag + 0x100 or tag)
|
|
elseif n <= 0xFFFF then
|
|
buffer[#buffer+1] = char(0xC8, -- ext16
|
|
floor(n / 0x100),
|
|
n % 0x100,
|
|
tag < 0 and tag + 0x100 or tag)
|
|
elseif n <= 4294967295.0 then
|
|
buffer[#buffer+1] = char(0xC9, -- ext&32
|
|
floor(n / 0x1000000),
|
|
floor(n / 0x10000) % 0x100,
|
|
floor(n / 0x100) % 0x100,
|
|
n % 0x100,
|
|
tag < 0 and tag + 0x100 or tag)
|
|
else
|
|
error"overflow in pack 'ext'"
|
|
end
|
|
buffer[#buffer+1] = data
|
|
end
|
|
|
|
function m.pack (data)
|
|
local buffer = {}
|
|
packers[type(data)](buffer, data)
|
|
return tconcat(buffer)
|
|
end
|
|
|
|
|
|
local unpackers -- forward declaration
|
|
|
|
local function unpack_cursor (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i > j then
|
|
c:underflow(i)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local val = s:byte(i)
|
|
c.i = i+1
|
|
return unpackers[val](c, val)
|
|
end
|
|
m.unpack_cursor = unpack_cursor
|
|
|
|
local function unpack_str (c, n)
|
|
local s, i, j = c.s, c.i, c.j
|
|
local e = i+n-1
|
|
if e > j or n < 0 then
|
|
c:underflow(e)
|
|
s, i, j = c.s, c.i, c.j
|
|
e = i+n-1
|
|
end
|
|
c.i = i+n
|
|
return s:sub(i, e)
|
|
end
|
|
|
|
local function unpack_array (c, n)
|
|
local t = {}
|
|
for i = 1, n do
|
|
t[i] = unpack_cursor(c)
|
|
end
|
|
return t
|
|
end
|
|
|
|
local function unpack_map (c, n)
|
|
local t = {}
|
|
for i = 1, n do
|
|
local k = unpack_cursor(c)
|
|
local val = unpack_cursor(c)
|
|
if k == nil or k ~= k then
|
|
k = m.sentinel
|
|
end
|
|
if k ~= nil then
|
|
t[k] = val
|
|
end
|
|
end
|
|
return t
|
|
end
|
|
|
|
local function unpack_float (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i+3 > j then
|
|
c:underflow(i+3)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1, b2, b3, b4 = s:byte(i, i+3)
|
|
local sign = b1 > 0x7F
|
|
local expo = (b1 % 0x80) * 0x2 + floor(b2 / 0x80)
|
|
local mant = ((b2 % 0x80) * 0x100 + b3) * 0x100 + b4
|
|
if sign then
|
|
sign = -1
|
|
else
|
|
sign = 1
|
|
end
|
|
local n
|
|
if mant == 0 and expo == 0 then
|
|
n = sign * 0.0
|
|
elseif expo == 0xFF then
|
|
if mant == 0 then
|
|
n = sign * huge
|
|
else
|
|
n = 0.0/0.0
|
|
end
|
|
else
|
|
n = sign * ldexp(1.0 + mant / 0x800000, expo - 0x7F)
|
|
end
|
|
c.i = i+4
|
|
return n
|
|
end
|
|
|
|
local function unpack_double (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i+7 > j then
|
|
c:underflow(i+7)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1, b2, b3, b4, b5, b6, b7, b8 = s:byte(i, i+7)
|
|
local sign = b1 > 0x7F
|
|
local expo = (b1 % 0x80) * 0x10 + floor(b2 / 0x10)
|
|
local mant = ((((((b2 % 0x10) * 0x100 + b3) * 0x100 + b4) * 0x100 + b5) * 0x100 + b6) * 0x100 + b7) * 0x100 + b8
|
|
if sign then
|
|
sign = -1
|
|
else
|
|
sign = 1
|
|
end
|
|
local n
|
|
if mant == 0 and expo == 0 then
|
|
n = sign * 0.0
|
|
elseif expo == 0x7FF then
|
|
if mant == 0 then
|
|
n = sign * huge
|
|
else
|
|
n = 0.0/0.0
|
|
end
|
|
else
|
|
n = sign * ldexp(1.0 + mant / 4503599627370496.0, expo - 0x3FF)
|
|
end
|
|
c.i = i+8
|
|
return n
|
|
end
|
|
|
|
local function unpack_uint8 (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i > j then
|
|
c:underflow(i)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1 = s:byte(i)
|
|
c.i = i+1
|
|
return b1
|
|
end
|
|
|
|
local function unpack_uint16 (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i+1 > j then
|
|
c:underflow(i+1)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1, b2 = s:byte(i, i+1)
|
|
c.i = i+2
|
|
return b1 * 0x100 + b2
|
|
end
|
|
|
|
local function unpack_uint32 (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i+3 > j then
|
|
c:underflow(i+3)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1, b2, b3, b4 = s:byte(i, i+3)
|
|
c.i = i+4
|
|
return ((b1 * 0x100 + b2) * 0x100 + b3) * 0x100 + b4
|
|
end
|
|
|
|
local function unpack_uint64 (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i+7 > j then
|
|
c:underflow(i+7)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1, b2, b3, b4, b5, b6, b7, b8 = s:byte(i, i+7)
|
|
c.i = i+8
|
|
return ((((((b1 * 0x100 + b2) * 0x100 + b3) * 0x100 + b4) * 0x100 + b5) * 0x100 + b6) * 0x100 + b7) * 0x100 + b8
|
|
end
|
|
|
|
local function unpack_int8 (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i > j then
|
|
c:underflow(i)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1 = s:byte(i)
|
|
c.i = i+1
|
|
if b1 < 0x80 then
|
|
return b1
|
|
else
|
|
return b1 - 0x100
|
|
end
|
|
end
|
|
|
|
local function unpack_int16 (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i+1 > j then
|
|
c:underflow(i+1)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1, b2 = s:byte(i, i+1)
|
|
c.i = i+2
|
|
if b1 < 0x80 then
|
|
return b1 * 0x100 + b2
|
|
else
|
|
return ((b1 - 0xFF) * 0x100 + (b2 - 0xFF)) - 1
|
|
end
|
|
end
|
|
|
|
local function unpack_int32 (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i+3 > j then
|
|
c:underflow(i+3)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1, b2, b3, b4 = s:byte(i, i+3)
|
|
c.i = i+4
|
|
if b1 < 0x80 then
|
|
return ((b1 * 0x100 + b2) * 0x100 + b3) * 0x100 + b4
|
|
else
|
|
return ((((b1 - 0xFF) * 0x100 + (b2 - 0xFF)) * 0x100 + (b3 - 0xFF)) * 0x100 + (b4 - 0xFF)) - 1
|
|
end
|
|
end
|
|
|
|
local function unpack_int64 (c)
|
|
local s, i, j = c.s, c.i, c.j
|
|
if i+7 > j then
|
|
c:underflow(i+7)
|
|
s, i, j = c.s, c.i, c.j
|
|
end
|
|
local b1, b2, b3, b4, b5, b6, b7, b8 = s:byte(i, i+7)
|
|
c.i = i+8
|
|
if b1 < 0x80 then
|
|
return ((((((b1 * 0x100 + b2) * 0x100 + b3) * 0x100 + b4) * 0x100 + b5) * 0x100 + b6) * 0x100 + b7) * 0x100 + b8
|
|
else
|
|
return ((((((((b1 - 0xFF) * 0x100 + (b2 - 0xFF)) * 0x100 + (b3 - 0xFF)) * 0x100 + (b4 - 0xFF)) * 0x100 + (b5 - 0xFF)) * 0x100 + (b6 - 0xFF)) * 0x100 + (b7 - 0xFF)) * 0x100 + (b8 - 0xFF)) - 1
|
|
end
|
|
end
|
|
|
|
function m.build_ext (tag, data)
|
|
return nil
|
|
end
|
|
|
|
local function unpack_ext (c, n, tag)
|
|
local s, i, j = c.s, c.i, c.j
|
|
local e = i+n-1
|
|
if e > j or n < 0 then
|
|
c:underflow(e)
|
|
s, i, j = c.s, c.i, c.j
|
|
e = i+n-1
|
|
end
|
|
c.i = i+n
|
|
return m.build_ext(tag, s:sub(i, e))
|
|
end
|
|
|
|
unpackers = setmetatable({
|
|
[0xC0] = function () return nil end,
|
|
[0xC2] = function () return false end,
|
|
[0xC3] = function () return true end,
|
|
[0xC4] = function (c) return unpack_str(c, unpack_uint8(c)) end, -- bin8
|
|
[0xC5] = function (c) return unpack_str(c, unpack_uint16(c)) end, -- bin16
|
|
[0xC6] = function (c) return unpack_str(c, unpack_uint32(c)) end, -- bin32
|
|
[0xC7] = function (c) return unpack_ext(c, unpack_uint8(c), unpack_int8(c)) end,
|
|
[0xC8] = function (c) return unpack_ext(c, unpack_uint16(c), unpack_int8(c)) end,
|
|
[0xC9] = function (c) return unpack_ext(c, unpack_uint32(c), unpack_int8(c)) end,
|
|
[0xCA] = unpack_float,
|
|
[0xCB] = unpack_double,
|
|
[0xCC] = unpack_uint8,
|
|
[0xCD] = unpack_uint16,
|
|
[0xCE] = unpack_uint32,
|
|
[0xCF] = unpack_uint64,
|
|
[0xD0] = unpack_int8,
|
|
[0xD1] = unpack_int16,
|
|
[0xD2] = unpack_int32,
|
|
[0xD3] = unpack_int64,
|
|
[0xD4] = function (c) return unpack_ext(c, 1, unpack_int8(c)) end,
|
|
[0xD5] = function (c) return unpack_ext(c, 2, unpack_int8(c)) end,
|
|
[0xD6] = function (c) return unpack_ext(c, 4, unpack_int8(c)) end,
|
|
[0xD7] = function (c) return unpack_ext(c, 8, unpack_int8(c)) end,
|
|
[0xD8] = function (c) return unpack_ext(c, 16, unpack_int8(c)) end,
|
|
[0xD9] = function (c) return unpack_str(c, unpack_uint8(c)) end,
|
|
[0xDA] = function (c) return unpack_str(c, unpack_uint16(c)) end,
|
|
[0xDB] = function (c) return unpack_str(c, unpack_uint32(c)) end,
|
|
[0xDC] = function (c) return unpack_array(c, unpack_uint16(c)) end,
|
|
[0xDD] = function (c) return unpack_array(c, unpack_uint32(c)) end,
|
|
[0xDE] = function (c) return unpack_map(c, unpack_uint16(c)) end,
|
|
[0xDF] = function (c) return unpack_map(c, unpack_uint32(c)) end,
|
|
}, {
|
|
__index = function (t, k)
|
|
if k < 0xC0 then
|
|
if k < 0x80 then
|
|
return function (c, val) return val end
|
|
elseif k < 0x90 then
|
|
return function (c, val) return unpack_map(c, val % 0x10) end
|
|
elseif k < 0xA0 then
|
|
return function (c, val) return unpack_array(c, val % 0x10) end
|
|
else
|
|
return function (c, val) return unpack_str(c, val % 0x20) end
|
|
end
|
|
elseif k > 0xDF then
|
|
return function (c, val) return val - 0x100 end
|
|
else
|
|
return function () error("unpack '" .. format('%#x', k) .. "' is unimplemented") end
|
|
end
|
|
end
|
|
})
|
|
|
|
local function cursor_string (str)
|
|
return {
|
|
s = str,
|
|
i = 1,
|
|
j = #str,
|
|
underflow = function ()
|
|
error "missing bytes"
|
|
end,
|
|
}
|
|
end
|
|
|
|
local function cursor_loader (ld)
|
|
return {
|
|
s = '',
|
|
i = 1,
|
|
j = 0,
|
|
underflow = function (self, e)
|
|
self.s = self.s:sub(self.i)
|
|
e = e - self.i + 1
|
|
self.i = 1
|
|
self.j = 0
|
|
while e > self.j do
|
|
local chunk = ld()
|
|
if not chunk then
|
|
error "missing bytes"
|
|
end
|
|
self.s = self.s .. chunk
|
|
self.j = #self.s
|
|
end
|
|
end,
|
|
}
|
|
end
|
|
|
|
function m.unpack (s)
|
|
checktype('unpack', 1, s, 'string')
|
|
local cursor = cursor_string(s)
|
|
local data = unpack_cursor(cursor)
|
|
if cursor.i <= cursor.j then
|
|
error "extra bytes"
|
|
end
|
|
return data
|
|
end
|
|
|
|
function m.unpacker (src)
|
|
if type(src) == 'string' then
|
|
local cursor = cursor_string(src)
|
|
return function ()
|
|
if cursor.i <= cursor.j then
|
|
return cursor.i, unpack_cursor(cursor)
|
|
end
|
|
end
|
|
elseif type(src) == 'function' then
|
|
local cursor = cursor_loader(src)
|
|
return function ()
|
|
if cursor.i > cursor.j then
|
|
pcall(cursor.underflow, cursor, cursor.i)
|
|
end
|
|
if cursor.i <= cursor.j then
|
|
return true, unpack_cursor(cursor)
|
|
end
|
|
end
|
|
else
|
|
argerror('unpacker', 1, "string or function expected, got " .. type(src))
|
|
end
|
|
end
|
|
|
|
set_string'string_compat'
|
|
set_integer'unsigned'
|
|
if SIZEOF_NUMBER == 4 then
|
|
maxinteger = 16777215
|
|
mininteger = -maxinteger
|
|
m.small_lua = true
|
|
unpackers[0xCB] = nil -- double
|
|
unpackers[0xCF] = nil -- uint64
|
|
unpackers[0xD3] = nil -- int64
|
|
set_number'float'
|
|
else
|
|
maxinteger = 9007199254740991
|
|
mininteger = -maxinteger
|
|
set_number'double'
|
|
if SIZEOF_NUMBER > 8 then
|
|
m.long_double = true
|
|
end
|
|
end
|
|
set_array'without_hole'
|
|
|
|
m._VERSION = '0.5.2'
|
|
m._DESCRIPTION = "lua-MessagePack : a pure Lua implementation"
|
|
m._COPYRIGHT = "Copyright (c) 2012-2019 Francois Perrad"
|
|
return m
|
|
--
|
|
-- This library is licensed under the terms of the MIT/X11 license,
|
|
-- like Lua itself.
|
|
--
|
|
|