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Update JsonNumber.swift
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@SusanDoggie
SusanDoggie committed Feb 24, 2022
1 parent 6059a8f commit 5c0ac19
Showing 1 changed file with 190 additions and 0 deletions.
190 changes: 190 additions & 0 deletions Sources/DoggieCore/Json/JsonNumber.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -301,3 +301,193 @@ extension Json.Number {
}
}
}

extension Json.Number {

@inlinable
public func remainder(dividingBy other: Json.Number) -> Json.Number {
switch (self, other) {
case let (.signed(lhs), .signed(rhs)): return .init(lhs % rhs)
case let (.unsigned(lhs), .unsigned(rhs)): return .init(lhs % rhs)
default: return .init(self._doubleValue.remainder(dividingBy: other._doubleValue))
}
}
}

extension Json.Number {

@inlinable
public static func abs(_ value: Json.Number) -> Json.Number {
switch value.normalized {
case let .signed(value): return .init(value < 0 ? -value : value)
case let .unsigned(value): return .init(value)
case let .number(value): return .init(value < 0 ? -value : value)
case let .decimal(value): return .init(value < 0 ? -value : value)
}
}

@inlinable
public static func floor(_ value: Json.Number) -> Json.Number {
switch value.normalized {
case let .signed(value): return .init(value)
case let .unsigned(value): return .init(value)
case let .number(value): return .init(value.rounded(.down))
case let .decimal(value): return .init(value.rounded(scale: 0, roundingMode: .down))
}
}

@inlinable
public static func ceil(_ value: Json.Number) -> Json.Number {
switch value.normalized {
case let .signed(value): return .init(value)
case let .unsigned(value): return .init(value)
case let .number(value): return .init(value.rounded(.up))
case let .decimal(value): return .init(value.rounded(scale: 0, roundingMode: .up))
}
}

@inlinable
public static func round(_ value: Json.Number) -> Json.Number {
switch value.normalized {
case let .signed(value): return .init(value)
case let .unsigned(value): return .init(value)
case let .number(value): return .init(value.rounded(.toNearestOrAwayFromZero))
case let .decimal(value): return .init(value.rounded(scale: 0, roundingMode: .plain))
}
}

@inlinable
public static func trunc(_ value: Json.Number) -> Json.Number {
switch value.normalized {
case let .signed(value): return .init(value)
case let .unsigned(value): return .init(value)
case let .number(value): return .init(value.rounded(.towardZero))
case let .decimal(value): return .init(value.rounded(scale: 0, roundingMode: value < 0 ? .up : .down))
}
}
}

extension Json.Number {

@inlinable
static func _pow(_ x: Decimal, _ n: UInt64) -> Decimal {
if x == 0 { return 0 }
if n == 0 { return 1 }
return n & 1 == 1 ? x * _pow(x * x, n >> 1) : _pow(x * x, n >> 1)
}

@inlinable
static func _pow<T: FixedWidthInteger>(_ x: T, _ n: UInt64) -> T? {
if x == 0 { return 0 }
if n == 0 { return 1 }
let (mul, overflow) = x.multipliedReportingOverflow(by: x)
guard overflow, let p = _pow(mul, n >> 1) else { return nil }
return n & 1 == 1 ? x * p : p
}

@inlinable
public static func pow(_ lhs: Json.Number, _ rhs: Json.Number) -> Json.Number {
switch (lhs.normalized, rhs.normalized) {
case let (.signed(_lhs), .unsigned(_rhs)): return _pow(_lhs, _rhs).map { .init($0) } ?? .init(Double.pow(lhs._doubleValue, rhs._doubleValue))
case let (.unsigned(_lhs), .unsigned(_rhs)): return _pow(_lhs, _rhs).map { .init($0) } ?? .init(Double.pow(lhs._doubleValue, rhs._doubleValue))
case let (.decimal(_lhs), .unsigned(_rhs)): return .init(_pow(_lhs, _rhs))
default: return .init(Double.pow(lhs._doubleValue, rhs._doubleValue))
}
}
}

extension Json.Number {

@inlinable
public static prefix func +(value: Json.Number) -> Json.Number {
return value
}

@inlinable
public static prefix func -(value: Json.Number) -> Json.Number {
switch value.normalized {
case let .signed(value): return .init(-value)
case let .unsigned(value): return .init(-Int64(value))
case let .number(value): return .init(-value)
case let .decimal(value): return .init(-value)
}
}

@inlinable
public static func +(lhs: Json.Number, rhs: Json.Number) -> Json.Number {

switch (lhs.normalized, rhs.normalized) {
case let (.signed(_lhs), .signed(_rhs)):

let (result, overflow) = _lhs.addingReportingOverflow(_rhs)
return overflow ? .init(lhs._doubleValue + rhs._doubleValue) : .init(result)

case let (.unsigned(_lhs), .unsigned(_rhs)):

let (result, overflow) = _lhs.addingReportingOverflow(_rhs)
return overflow ? .init(lhs._doubleValue + rhs._doubleValue) : .init(result)

case let (.number(_lhs), .number(_rhs)): return .init(_lhs + _rhs)
case let (.decimal(_lhs), .decimal(_rhs)): return .init(_lhs + _rhs)
default: return .init(lhs._doubleValue + rhs._doubleValue)
}
}

@inlinable
public static func -(lhs: Json.Number, rhs: Json.Number) -> Json.Number {

switch (lhs.normalized, rhs.normalized) {
case let (.signed(_lhs), .signed(_rhs)):

let (result, overflow) = _lhs.subtractingReportingOverflow(_rhs)
return overflow ? .init(lhs._doubleValue - rhs._doubleValue) : .init(result)

case let (.unsigned(_lhs), .unsigned(_rhs)):

let (result, overflow) = _lhs.subtractingReportingOverflow(_rhs)
return overflow ? .init(lhs._doubleValue - rhs._doubleValue) : .init(result)

case let (.number(_lhs), .number(_rhs)): return .init(_lhs - _rhs)
case let (.decimal(_lhs), .decimal(_rhs)): return .init(_lhs - _rhs)
default: return .init(lhs._doubleValue - rhs._doubleValue)
}
}

@inlinable
public static func *(lhs: Json.Number, rhs: Json.Number) -> Json.Number {

switch (lhs.normalized, rhs.normalized) {
case let (.signed(_lhs), .signed(_rhs)):

let (result, overflow) = _lhs.multipliedReportingOverflow(by: _rhs)
return overflow ? .init(lhs._doubleValue * rhs._doubleValue) : .init(result)

case let (.unsigned(_lhs), .unsigned(_rhs)):

let (result, overflow) = _lhs.multipliedReportingOverflow(by: _rhs)
return overflow ? .init(lhs._doubleValue * rhs._doubleValue) : .init(result)

case let (.decimal(_lhs), .decimal(_rhs)): return .init(_lhs * _rhs)
default: return .init(lhs._doubleValue * rhs._doubleValue)
}
}

@inlinable
public static func /(lhs: Json.Number, rhs: Json.Number) -> Json.Number {

switch (lhs.normalized, rhs.normalized) {
case let (.signed(_lhs), .signed(_rhs)):

let (result, remainder) = _lhs.quotientAndRemainder(dividingBy: _rhs)
return remainder == 0 ? .init(result) : .init(lhs._doubleValue / rhs._doubleValue)

case let (.unsigned(_lhs), .unsigned(_rhs)):

let (result, remainder) = _lhs.quotientAndRemainder(dividingBy: _rhs)
return remainder == 0 ? .init(result) : .init(lhs._doubleValue / rhs._doubleValue)

case let (.decimal(_lhs), .decimal(_rhs)): return .init(_lhs / _rhs)
default: return .init(lhs._doubleValue / rhs._doubleValue)
}
}
}

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