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Module:IP: Difference between revisions
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move more metamethods out of the constructor, edit ipv4Address and ipv6Address for style
(try original format again) |
(move more metamethods out of the constructor, edit ipv4Address and ipv6Address for style) |
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Line 165:
end
--------------------------------------------------------------------------------
-- IPAddress class
-- Represents a single IPv4 or IPv6 address.
--------------------------------------------------------------------------------
local IPAddress = {}
do
local dataKey = {} -- A unique key to access objects' internal data.
-- Private static methods
local function parseIPv4(ipStr)
-- If ipStr is a valid IPv4 string, return a collection of its parts.
-- Otherwise, return nil.
-- This representation is for compatibility with IPv6 addresses.
local octets = collection()
local s = ipStr:match('^%s*(.-)%s*$') .. '.'
for item in s:gmatch('(.-)%.') do
octets:add(item)
end
if octets.n == 4 then
for i, s in ipairs(octets) do
if s:match('^%d+$') then
local num = tonumber(s)
if 0 <= num and num <= 255 then
if num > 0 and s:match('^0') then
-- A redundant leading zero is for an IP in octal.
return false
end
octets[i] = num
else
return false
end
else
return false
end
end
local parts = collection()
for i = 1, 3, 2 do
parts:add(octets[i] * 256 + octets[i+1])
end
return parts
end
return nil
end
local function
ipStr, n = ipStr:gsub('::', string.rep(':', 9 - n))
parts:add(item)
for i, s in ipairs(parts) do
if s == '' then
parts[i] = 0
else
local num = tonumber('0x' .. s)
if num and 0 <= num and num <= 65535 then
parts[i] = num
else
return false
end
end
end
return parts
end
return nil
end
-- Metamethods that don't need upvalues
local function ipEquals(ip1, ip2)
local lhs = ip1[dataKey].parts
Line 268:
end
return lhs.n < rhs.n
end
local function concatIPs(ip1, ip2)
return tostring(ip1) .. tostring(ip2)
end
local function ipToString(ip)
return ipString(ip[dataKey].parts)
end
Line 279 ⟶ 287:
-- Set initial values
if not data.parts then
error('invalid IP', 2)
end
Line 331 ⟶ 340:
__eq = ipEquals,
__lt = ipLessThan,
__concat = concatIPs,
__tostring = ipToString,
__index = function (self, key)
if key == dataKey then
return data
else
return IPAddress[key]
end
end,
})
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