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Copy pathDouble.lua
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157 lines (127 loc) · 3.2 KB
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--[[
Copyright 2017 YANG Huan ([email protected]).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--]]
local System = System
local throw = System.throw
local ArgumentException = System.ArgumentException
local ArgumentNullException = System.ArgumentNullException
local FormatException = System.FormatException
local OverflowException = System.OverflowException
local type = type
local tonumber = tonumber
local Double = {}
debug.setmetatable(0, Double)
local nan = 0 / 0
local posInf = 1 / 0
local negInf = - 1 / 0
local nanHashCode = {}
Double.NaN = nan
Double.NegInf = negInf
Double.PosInf = posInf
--http://lua-users.org/wiki/InfAndNanComparisons
local function isNaN(v)
return v ~= v
end
Double.IsNaN = isNaN
local function compare(this, v)
if this < v then return -1 end
if this > v then return 1 end
if this == v then return 0 end
if isNaN(this) then
return isNaN(v) and 0 or -1
else
return 1
end
end
Double.CompareTo = compare
function Double.CompareToObj(this, v)
if v == null then return 1 end
if type(v) ~= "number" then
throw(ArgumentException("Arg_MustBeNumber"))
end
return compare(this, v)
end
local function equals(this, v)
if this == v then return true end
return isNaN(this) and isNaN(v)
end
Double.Equals = equals
function Double.EqualsObj(this, v)
if type(v) ~= "number" then
return false
end
return equals(this, v)
end
function Double.GetHashCode(this)
return isNaN(this) and nanHashCode or this
end
Double.ToString = tostring
local function parse(s)
if s == nil then
return nil, 1
end
local v = tonumber(s)
if v == nil then
return nil, 2
end
return v
end
local function tryParse(s)
local v = parse(s)
if v then
return true, v
end
return false, 0
end
local function parseWithException(s)
local v, err = parse(s)
if v then
return v
end
if err == 1 then
throw(ArgumentNullException())
else
throw(FormatException())
end
end
Double.Parse = parseWithException
Double.TryParse = tryParse
function Double.IsNegativeInfinity(v)
return v == negInf
end
function Double.IsPositiveInfinity(v)
return v == posInf
end
function Double.IsInfinity(v)
return v == posInf or v == negInf
end
function Double.ParseSingle(s)
local v = parseWithException(s)
if v < -3.40282347E+38 or v > 3.40282347E+38 then
throw(OverflowException())
end
return v
end
function Double.TryParseSingle(s)
local v = parse(s)
if v and v >= -3.40282347E+38 and v < 3.40282347E+38 then
return true, v
end
return false, 0
end
function Double.__default__()
return 0
end
function Double.__inherits__()
return { System.IComparable, System.IFormattable, System.IComparable_1(Double), System.IEquatable_1(Double) }
end
System.defStc("System.Double", Double)