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More bigint type checks added

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Strict checking is still off, however a check can be coerced
This commit is contained in:
Ishaan Bhardwaj 2021-02-21 20:38:16 -05:00
parent bf19f49323
commit 716de2814b
1 changed files with 31 additions and 28 deletions
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59
libs/bigint/bigint.lua
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@ -8,6 +8,33 @@ local strict = false
local bigint = {}
local mt = {
__add = function(lhs, rhs)
return bigint.add(lhs, rhs)
end,
__unm = function()
return bigint.negate(self)
end,
__sub = function(lhs, rhs)
return bigint.subtract(lhs, rhs)
end,
__mul = function(lhs, rhs)
return bigint.multiply(lhs, rhs)
end,
__div = function(lhs, rhs)
return bigint.divide(lhs, rhs)
end,
__mod = function(lhs, rhs)
return bigint.modulus(lhs, rhs)
end,
__pow = function(lhs, rhs)
return bigint.exponentiate(lhs, rhs)
end,
__tostring = function()
return bigint.unserialize(self, "s")
end
}
local named_powers = require("libs.bigint.named-powers-of-ten")
-- Create a new bigint or convert a number or string into a big
@ -28,32 +55,7 @@ function bigint.new(num)
return newint
end
setmetatable(self, {
__add = function(lhs, rhs)
return bigint.add(lhs, rhs)
end,
__unm = function()
return bigint.negate(self)
end,
__sub = function(lhs, rhs)
return bigint.subtract(lhs, rhs)
end,
__mul = function(lhs, rhs)
return bigint.multiply(lhs, rhs)
end,
__div = function(lhs, rhs)
return bigint.divide(lhs, rhs)
end,
__mod = function(lhs, rhs)
return bigint.modulus(lhs, rhs)
end,
__pow = function(lhs, rhs)
return bigint.exponentiate(lhs, rhs)
end,
__tostring = function()
return bigint.unserialize(self, "s")
end
})
setmetatable(self, mt)
if (num) then
local num_string = tostring(num)
@ -73,10 +75,11 @@ end
-- forced by supplying "true" as the second argument.
function bigint.check(big, force)
if (strict or force) then
assert(getmetatable(big) == mt, "at least one arg is not a bigint")
assert(#big.digits > 0, "bigint is empty")
assert(type(big.sign) == "string", "bigint is unsigned")
assert(big.sign == "+" or big.sign == "-", "bigint is unsigned")
for _, digit in pairs(big.digits) do
assert(type(digit) == "number", digit .. " is not a number")
assert(type(digit) == "number", "at least one digit is invalid")
assert(digit <= 9 and digit >= 0, digit .. " is not between 0 and 9")
assert(math.floor(digit) == digit, digit .. " is not an integer")
end