Initial implementation of multiplatform BigInteger
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package scientifik.kmath.operations
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import kotlin.math.max
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import kotlin.math.sign
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/*
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* Kotlin Multiplatform implementation of Big Integer numbers (KBigInteger).
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* Initial version from https://github.com/robdrynkin/kotlin-big-integer
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*/
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@kotlin.ExperimentalUnsignedTypes
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typealias Magnitude = UIntArray
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@kotlin.ExperimentalUnsignedTypes
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typealias TBase = ULong
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object KBigIntegerRing: Ring<KBigInteger> {
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override val zero: KBigInteger = KBigInteger.ZERO
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override val one: KBigInteger = KBigInteger.ONE
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override fun add(a: KBigInteger, b: KBigInteger): KBigInteger = a.plus(b)
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override fun multiply(a: KBigInteger, k: Number): KBigInteger = a.times(k.toLong())
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override fun multiply(a: KBigInteger, b: KBigInteger): KBigInteger = a.times(b)
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operator fun String.unaryPlus(): KBigInteger = KBigInteger(this)!!
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operator fun String.unaryMinus(): KBigInteger = -KBigInteger(this)!!
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}
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@kotlin.ExperimentalUnsignedTypes
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class KBigInteger(sign: Int = 0, magnitude: Magnitude = Magnitude(0)):
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RingElement<KBigInteger, KBigInteger, KBigIntegerRing>, Comparable<KBigInteger> {
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constructor(x: Int) : this(x.sign, uintArrayOf(kotlin.math.abs(x).toUInt()))
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constructor(x: Long) : this(x.sign, uintArrayOf(
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(kotlin.math.abs(x).toULong() and BASE).toUInt(),
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((kotlin.math.abs(x).toULong() shr BASE_SIZE) and BASE).toUInt()))
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val magnitude = stripLeadingZeros(magnitude)
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val sign = if (this.magnitude.isNotEmpty()) sign else 0
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val sizeByte: Int = magnitude.size * BASE_SIZE / 4
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override val context: KBigIntegerRing get() = KBigIntegerRing
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override fun unwrap(): KBigInteger = this
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override fun KBigInteger.wrap(): KBigInteger = this
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companion object {
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val BASE = 0xffffffffUL
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const val BASE_SIZE: Int = 32
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val ZERO: KBigInteger = KBigInteger()
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val ONE: KBigInteger = KBigInteger(1)
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private val hexMapping: HashMap<UInt, String> =
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hashMapOf(
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0U to "0", 1U to "1", 2U to "2", 3U to "3", 4U to "4", 5U to "5", 6U to "6", 7U to "7", 8U to "8",
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9U to "9", 10U to "a", 11U to "b", 12U to "c", 13U to "d", 14U to "e", 15U to "f"
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)
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private fun stripLeadingZeros(mag: Magnitude): Magnitude {
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// TODO: optimize performance
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if (mag.isEmpty()) {
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return mag
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}
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var resSize: Int = mag.size - 1
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while (mag[resSize] == 0U) {
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if (resSize == 0)
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break
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resSize -= 1
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}
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return mag.sliceArray(IntRange(0, resSize))
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}
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private fun compareMagnitudes(mag1: Magnitude, mag2: Magnitude): Int {
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when {
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mag1.size > mag2.size -> return 1
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mag1.size < mag2.size -> return -1
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else -> {
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for (i in mag1.size - 1 downTo 0) {
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if (mag1[i] > mag2[i]) {
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return 1
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} else if (mag1[i] < mag2[i]) {
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return -1
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}
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}
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return 0
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}
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}
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}
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private fun addMagnitudes(mag1: Magnitude, mag2: Magnitude): Magnitude {
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val resultLength: Int = max(mag1.size, mag2.size) + 1
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val result = Magnitude(resultLength)
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var carry: TBase = 0UL
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for (i in 0 until resultLength - 1) {
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val res = when {
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i >= mag1.size -> mag2[i].toULong() + carry
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i >= mag2.size -> mag1[i].toULong() + carry
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else -> mag1[i].toULong() + mag2[i].toULong() + carry
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}
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result[i] = (res and BASE).toUInt()
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carry = (res shr BASE_SIZE)
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}
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result[resultLength - 1] = carry.toUInt()
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return result
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}
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private fun subtractMagnitudes(mag1: Magnitude, mag2: Magnitude): Magnitude {
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val resultLength: Int = mag1.size
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val result = Magnitude(resultLength)
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var carry = 0L
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for (i in 0 until resultLength) {
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var res: Long =
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if (i < mag2.size) mag1[i].toLong() - mag2[i].toLong() - carry
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else mag1[i].toLong() - carry
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carry = if (res < 0) 1 else 0
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res += carry * (BASE + 1UL).toLong()
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result[i] = res.toUInt()
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}
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return result
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}
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private fun multiplyMagnitudeByUInt(mag: Magnitude, x: UInt): Magnitude {
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val resultLength: Int = mag.size + 1
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val result = Magnitude(resultLength)
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var carry: ULong = 0UL
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for (i in mag.indices) {
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val cur: ULong = carry + mag[i].toULong() * x.toULong()
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result[i] = (cur and BASE.toULong()).toUInt()
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carry = cur shr BASE_SIZE
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}
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result[resultLength - 1] = (carry and BASE).toUInt()
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return result
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}
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private fun multiplyMagnitudes(mag1: Magnitude, mag2: Magnitude): Magnitude {
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val resultLength: Int = mag1.size + mag2.size
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val result = Magnitude(resultLength)
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for (i in mag1.indices) {
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var carry: ULong = 0UL
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for (j in mag2.indices) {
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val cur: ULong = result[i + j].toULong() + mag1[i].toULong() * mag2[j].toULong() + carry
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result[i + j] = (cur and BASE.toULong()).toUInt()
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carry = cur shr BASE_SIZE
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}
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result[i + mag2.size] = (carry and BASE).toUInt()
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}
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return result
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}
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internal fun divideMagnitudeByUInt(mag: Magnitude, x: UInt): Magnitude {
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val resultLength: Int = mag.size
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val result = Magnitude(resultLength)
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var carry: ULong = 0UL
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for (i in mag.size - 1 downTo 0) {
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val cur: ULong = mag[i].toULong() + (carry shl BASE_SIZE)
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result[i] = (cur / x).toUInt()
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carry = cur % x
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}
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return result
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}
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internal fun divideMagnitudes(mag1_: Magnitude, mag2: Magnitude): Magnitude {
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val mag1 = ULongArray(mag1_.size) { mag1_[it].toULong() }
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val resultLength: Int = mag1.size - mag2.size + 1
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val result = LongArray(resultLength)
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for (i in mag1.size - 1 downTo mag2.size - 1) {
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val div: ULong = mag1[i] / mag2[mag2.size - 1]
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result[i - mag2.size + 1] = div.toLong()
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for (j in mag2.indices) {
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mag1[i - j] -= mag2[mag2.size - 1 - j] * div
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}
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if (i > 0) {
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mag1[i - 1] += (mag1[i] shl BASE_SIZE)
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}
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}
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val normalizedResult = Magnitude(resultLength)
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var carry = 0L
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for (i in result.indices) {
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result[i] += carry
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if (result[i] < 0L) {
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normalizedResult[i] = (result[i] + (BASE + 1UL).toLong()).toUInt()
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carry = -1
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} else {
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normalizedResult[i] = result[i].toUInt()
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carry = 0
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}
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}
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return normalizedResult
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}
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}
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override fun compareTo(other: KBigInteger): Int {
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return when {
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(this.sign == 0) and (other.sign == 0) -> 0
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this.sign < other.sign -> -1
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this.sign > other.sign -> 1
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else -> this.sign * compareMagnitudes(this.magnitude, other.magnitude)
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}
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}
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override fun equals(other: Any?): Boolean {
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if (other is KBigInteger) {
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return this.compareTo(other) == 0
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}
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else error("Can't compare KBigInteger to a different type")
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}
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override fun hashCode(): Int {
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return magnitude.hashCode() + this.sign
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}
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operator fun unaryMinus(): KBigInteger {
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return if (this.sign == 0) this else KBigInteger(-this.sign, this.magnitude)
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}
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override operator fun plus(b: KBigInteger): KBigInteger {
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return when {
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b.sign == 0 -> this
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this.sign == 0 -> b
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this == -b -> ZERO
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this.sign == b.sign -> KBigInteger(this.sign, addMagnitudes(this.magnitude, b.magnitude))
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else -> {
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val comp: Int = compareMagnitudes(this.magnitude, b.magnitude)
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if (comp == 1) {
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KBigInteger(this.sign, subtractMagnitudes(this.magnitude, b.magnitude))
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} else {
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KBigInteger(-this.sign, subtractMagnitudes(b.magnitude, this.magnitude))
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}
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}
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}
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}
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override operator fun minus(b: KBigInteger): KBigInteger {
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return this + (-b)
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}
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override operator fun times(b: KBigInteger): KBigInteger {
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return when {
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this.sign == 0 -> ZERO
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b.sign == 0 -> ZERO
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// TODO: Karatsuba
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else -> KBigInteger(this.sign * b.sign, multiplyMagnitudes(this.magnitude, b.magnitude))
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}
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}
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operator fun times(other: UInt): KBigInteger {
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return when {
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this.sign == 0 -> ZERO
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other == 0U -> ZERO
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else -> KBigInteger(this.sign, multiplyMagnitudeByUInt(this.magnitude, other))
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}
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}
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operator fun times(other: Int): KBigInteger {
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return if (other > 0)
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this * kotlin.math.abs(other).toUInt()
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else
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-this * kotlin.math.abs(other).toUInt()
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}
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operator fun div(other: UInt): KBigInteger {
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return KBigInteger(this.sign, divideMagnitudeByUInt(this.magnitude, other))
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}
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operator fun div(other: Int): KBigInteger {
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return KBigInteger(this.sign * other.sign, divideMagnitudeByUInt(this.magnitude, kotlin.math.abs(other).toUInt()))
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}
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operator fun div(other: KBigInteger): KBigInteger {
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return when {
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this < other -> ZERO
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this == other -> ONE
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else -> KBigInteger(this.sign * other.sign, divideMagnitudes(this.magnitude, other.magnitude))
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}
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}
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operator fun rem(other: Int): Int {
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val res = this - (this / other) * other
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return if (res == ZERO) 0 else res.sign * res.magnitude[0].toInt()
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}
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operator fun rem(other: KBigInteger): KBigInteger {
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return this - (this / other) * other
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}
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fun modPow(exponent: KBigInteger, m: KBigInteger): KBigInteger {
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return when {
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exponent == ZERO -> ONE
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exponent % 2 == 1 -> (this * modPow(exponent - ONE, m)) % m
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else -> {
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val sqRoot = modPow(exponent / 2, m)
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(sqRoot * sqRoot) % m
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}
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}
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}
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override fun toString(): String {
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if (this.sign == 0) {
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return "0x0"
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}
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var res: String = if (this.sign == -1) "-0x" else "0x"
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var numberStarted = false
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for (i in this.magnitude.size - 1 downTo 0) {
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for (j in BASE_SIZE / 4 - 1 downTo 0) {
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val curByte = (this.magnitude[i] shr 4 * j) and 0xfU
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if (numberStarted or (curByte != 0U)) {
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numberStarted = true
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res += hexMapping[curByte]
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}
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}
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}
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return res
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}
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}
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@kotlin.ExperimentalUnsignedTypes
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fun abs(x: KBigInteger): KBigInteger {
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return if (x.sign == 0) x else KBigInteger(1, x.magnitude)
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}
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@kotlin.ExperimentalUnsignedTypes
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// Can't put it as constructor in class due to platform declaration clash with KBigInteger(Int)
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fun KBigInteger(x: UInt): KBigInteger
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= KBigInteger(1, uintArrayOf(x))
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@kotlin.ExperimentalUnsignedTypes
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// Can't put it as constructor in class due to platform declaration clash with KBigInteger(Long)
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fun KBigInteger(x: ULong): KBigInteger
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= KBigInteger(1, uintArrayOf((x and KBigInteger.BASE).toUInt(), ((x shr KBigInteger.BASE_SIZE) and KBigInteger.BASE).toUInt()))
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val hexChToInt = hashMapOf('0' to 0, '1' to 1, '2' to 2, '3' to 3, '4' to 4, '5' to 5, '6' to 6, '7' to 7,
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'8' to 8, '9' to 9, 'A' to 10, 'B' to 11, 'C' to 12, 'D' to 13, 'E' to 14, 'F' to 15)
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// Returns None if a valid number can not be read from a string
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fun KBigInteger(s: String): KBigInteger? {
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val sign: Int
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val sPositive: String
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when {
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s[0] == '+' -> {
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sign = +1
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sPositive = s.substring(1)
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}
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s[0] == '-' -> {
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sign = -1
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sPositive = s.substring(1)
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}
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else -> {
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sPositive = s
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sign = +1
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}
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}
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var res = KBigInteger.ZERO
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var digitValue = KBigInteger.ONE
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val sPositiveUpper = sPositive.toUpperCase()
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if (sPositiveUpper.startsWith("0X")) { // hex representation
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val sHex = sPositiveUpper.substring(2)
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for (ch in sHex.reversed()) {
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if (ch == '_') continue
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res += digitValue * (hexChToInt[ch] ?: return null)
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digitValue *= KBigInteger(16)
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}
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}
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else { // decimal representation
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val sDecimal = sPositiveUpper
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for (ch in sDecimal.reversed()) {
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if (ch == '_') continue
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if (ch !in '0'..'9') {
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return null
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}
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res += digitValue * (ch.toInt() - '0'.toInt())
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digitValue *= KBigInteger(10)
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}
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}
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return res * sign
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}
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@ -0,0 +1,480 @@
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package scientifik.kmath.operations
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import kotlin.test.Test
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import kotlin.test.assertTrue
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import kotlin.test.assertEquals
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@kotlin.ExperimentalUnsignedTypes
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class KBigIntegerConstructorTest {
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@Test
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fun testConstructorZero() {
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assertEquals(KBigInteger(0), KBigInteger(0, uintArrayOf()))
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}
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@Test
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fun testConstructor8() {
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assertEquals(KBigInteger(8), KBigInteger(1, uintArrayOf(8U)))
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}
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@Test
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fun testConstructor_0xffffffffaL() {
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val x = KBigInteger(-0xffffffffaL)
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val y = KBigInteger(-1, uintArrayOf(0xfffffffaU, 0xfU))
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assertEquals(x, y)
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}
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}
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@kotlin.ExperimentalUnsignedTypes
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class KBigIntegerCompareTest {
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@Test
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fun testCompare1_2() {
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val x = KBigInteger(1)
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val y = KBigInteger(2)
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assertTrue { x < y }
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}
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@Test
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fun testCompare0_0() {
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val x = KBigInteger(0)
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val y = KBigInteger(0)
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assertEquals(x, y)
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}
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@Test
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fun testCompare1__2() {
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val x = KBigInteger(1)
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val y = KBigInteger(-2)
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assertTrue { x > y }
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}
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@Test
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fun testCompare_1__2() {
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val x = KBigInteger(-1)
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val y = KBigInteger(-2)
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assertTrue { x > y }
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}
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@Test
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fun testCompare_2__1() {
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val x = KBigInteger(-2)
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val y = KBigInteger(-1)
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assertTrue { x < y }
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}
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@Test
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fun testCompare12345_12345() {
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val x = KBigInteger(12345)
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val y = KBigInteger(12345)
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assertEquals(x, y)
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}
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@Test
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fun testEqualsWithLong() {
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val x = KBigInteger(12345)
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assertTrue { x == KBigInteger(12345L) }
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}
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@Test
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fun testEqualsWithULong() {
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val x = KBigInteger(12345)
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assertTrue { x == KBigInteger(12345UL) }
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}
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@Test
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fun testCompareBigNumbersGreater() {
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val x = KBigInteger(0xfffffffffL)
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val y = KBigInteger(0xffffffffaL)
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assertTrue { x > y }
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}
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@Test
|
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fun testCompareBigNumbersEqual() {
|
||||
val x = KBigInteger(0xffffffffaL)
|
||||
val y = KBigInteger(0xffffffffaL)
|
||||
assertEquals(x, y)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testCompareBigNumbersLess() {
|
||||
val x = KBigInteger(-0xffffffffaL)
|
||||
val y = KBigInteger(0xffffffffaL)
|
||||
assertTrue { x < y }
|
||||
}
|
||||
}
|
||||
|
||||
@kotlin.ExperimentalUnsignedTypes
|
||||
class KBigIntegerOperationsTest {
|
||||
@Test
|
||||
fun testPlus_1_1() {
|
||||
val x = KBigInteger(1)
|
||||
val y = KBigInteger(1)
|
||||
|
||||
val res = x + y
|
||||
val sum = KBigInteger(2)
|
||||
|
||||
assertEquals(sum, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testPlusBigNumbers() {
|
||||
val x = KBigInteger(0x7fffffff)
|
||||
val y = KBigInteger(0x7fffffff)
|
||||
val z = KBigInteger(0x7fffffff)
|
||||
|
||||
val res = x + y + z
|
||||
val sum = KBigInteger(1, uintArrayOf(0x7ffffffdU, 0x1U))
|
||||
|
||||
assertEquals(sum, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testUnaryMinus() {
|
||||
val x = KBigInteger(1234)
|
||||
val y = KBigInteger(-1234)
|
||||
assertEquals(-x, y)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMinus_2_1() {
|
||||
val x = KBigInteger(2)
|
||||
val y = KBigInteger(1)
|
||||
|
||||
val res = x - y
|
||||
val sum = KBigInteger(1)
|
||||
|
||||
assertEquals(sum, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMinus__2_1() {
|
||||
val x = KBigInteger(-2)
|
||||
val y = KBigInteger(1)
|
||||
|
||||
val res = x - y
|
||||
val sum = KBigInteger(-3)
|
||||
|
||||
assertEquals(sum, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMinus___2_1() {
|
||||
val x = KBigInteger(-2)
|
||||
val y = KBigInteger(1)
|
||||
|
||||
val res = -x - y
|
||||
val sum = KBigInteger(1)
|
||||
|
||||
assertEquals(sum, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMinusBigNumbers() {
|
||||
val x = KBigInteger(12345)
|
||||
val y = KBigInteger(0xffffffffaL)
|
||||
|
||||
val res = x - y
|
||||
val sum = KBigInteger(-0xfffffcfc1L)
|
||||
|
||||
assertEquals(sum, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMultiply_2_3() {
|
||||
val x = KBigInteger(2)
|
||||
val y = KBigInteger(3)
|
||||
|
||||
val res = x * y
|
||||
val prod = KBigInteger(6)
|
||||
|
||||
assertEquals(prod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMultiply__2_3() {
|
||||
val x = KBigInteger(-2)
|
||||
val y = KBigInteger(3)
|
||||
|
||||
val res = x * y
|
||||
val prod = KBigInteger(-6)
|
||||
|
||||
assertEquals(prod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMultiply_0xfff123_0xfff456() {
|
||||
val x = KBigInteger(0xfff123)
|
||||
val y = KBigInteger(0xfff456)
|
||||
|
||||
val res = x * y
|
||||
val prod = KBigInteger(0xffe579ad5dc2L)
|
||||
|
||||
assertEquals(prod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMultiplyUInt_0xfff123_0xfff456() {
|
||||
val x = KBigInteger(0xfff123)
|
||||
val y = 0xfff456U
|
||||
|
||||
val res = x * y
|
||||
val prod = KBigInteger(0xffe579ad5dc2L)
|
||||
|
||||
assertEquals(prod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMultiplyInt_0xfff123__0xfff456() {
|
||||
val x = KBigInteger(0xfff123)
|
||||
val y = -0xfff456
|
||||
|
||||
val res = x * y
|
||||
val prod = KBigInteger(-0xffe579ad5dc2L)
|
||||
|
||||
assertEquals(prod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMultiply_0xffffffff_0xffffffff() {
|
||||
val x = KBigInteger(0xffffffffL)
|
||||
val y = KBigInteger(0xffffffffL)
|
||||
|
||||
val res = x * y
|
||||
val prod = KBigInteger(0xfffffffe00000001UL)
|
||||
|
||||
assertEquals(prod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun test_square_0x11223344U_0xad2ffffdU_0x17eU() {
|
||||
val num = KBigInteger(-1, uintArrayOf(0x11223344U, 0xad2ffffdU, 0x17eU ))
|
||||
println(num)
|
||||
val res = num * num
|
||||
assertEquals(res, KBigInteger(1, uintArrayOf(0xb0542a10U, 0xbbd85bc8U, 0x2a1fa515U, 0x5069e03bU, 0x23c09U)))
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testDivision_6_3() {
|
||||
val x = KBigInteger(6)
|
||||
val y = 3U
|
||||
|
||||
val res = x / y
|
||||
val div = KBigInteger(2)
|
||||
|
||||
assertEquals(div, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testBigDivision_6_3() {
|
||||
val x = KBigInteger(6)
|
||||
val y = KBigInteger(3)
|
||||
|
||||
val res = x / y
|
||||
val div = KBigInteger(2)
|
||||
|
||||
assertEquals(div, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testDivision_20__3() {
|
||||
val x = KBigInteger(20)
|
||||
val y = -3
|
||||
|
||||
val res = x / y
|
||||
val div = KBigInteger(-6)
|
||||
|
||||
assertEquals(div, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testBigDivision_20__3() {
|
||||
val x = KBigInteger(20)
|
||||
val y = KBigInteger(-3)
|
||||
|
||||
val res = x / y
|
||||
val div = KBigInteger(-6)
|
||||
|
||||
assertEquals(div, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testDivision_0xfffffffe00000001_0xffffffff() {
|
||||
val x = KBigInteger(0xfffffffe00000001UL)
|
||||
val y = 0xffffffffU
|
||||
|
||||
val res = x / y
|
||||
val div = KBigInteger(0xffffffffL)
|
||||
|
||||
assertEquals(div, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testBigDivision_0xfffffffe00000001_0xffffffff() {
|
||||
val x = KBigInteger(0xfffffffe00000001UL)
|
||||
val y = KBigInteger(0xffffffffU)
|
||||
|
||||
val res = x / y
|
||||
val div = KBigInteger(0xffffffffL)
|
||||
|
||||
assertEquals(div, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMod_20_3() {
|
||||
val x = KBigInteger(20)
|
||||
val y = 3
|
||||
|
||||
val res = x % y
|
||||
val mod = 2
|
||||
|
||||
assertEquals(mod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testBigMod_20_3() {
|
||||
val x = KBigInteger(20)
|
||||
val y = KBigInteger(3)
|
||||
|
||||
val res = x % y
|
||||
val mod = KBigInteger(2)
|
||||
|
||||
assertEquals(mod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testMod_0xfffffffe00000001_12345() {
|
||||
val x = KBigInteger(0xfffffffe00000001UL)
|
||||
val y = 12345
|
||||
|
||||
val res = x % y
|
||||
val mod = 1980
|
||||
|
||||
assertEquals(mod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testBigMod_0xfffffffe00000001_12345() {
|
||||
val x = KBigInteger(0xfffffffe00000001UL)
|
||||
val y = KBigInteger(12345)
|
||||
|
||||
val res = x % y
|
||||
val mod = KBigInteger(1980)
|
||||
|
||||
assertEquals(mod, res)
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testModPow_3_10_17() {
|
||||
val x = KBigInteger(3)
|
||||
val exp = KBigInteger(10)
|
||||
val mod = KBigInteger(17)
|
||||
|
||||
val res = KBigInteger(8)
|
||||
|
||||
return assertEquals(res, x.modPow(exp, mod))
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testModPowBigNumbers() {
|
||||
val x = KBigInteger(0xfffffffeabcdef01UL)
|
||||
val exp = KBigInteger(2)
|
||||
val mod = KBigInteger(0xfffffffeabcUL)
|
||||
|
||||
val res = KBigInteger(0x6deec7895faUL)
|
||||
|
||||
return assertEquals(res, x.modPow(exp, mod))
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testModBigNumbers() {
|
||||
val x = KBigInteger(0xfffffffeabcdef01UL)
|
||||
val mod = KBigInteger(0xfffffffeabcUL)
|
||||
|
||||
val res = KBigInteger(0xdef01)
|
||||
|
||||
return assertEquals(res, x % mod)
|
||||
}
|
||||
}
|
||||
|
||||
@kotlin.ExperimentalUnsignedTypes
|
||||
class KBigIntegerConversionsTest {
|
||||
@Test
|
||||
fun testToString0x10() {
|
||||
val x = KBigInteger(0x10)
|
||||
assertEquals("0x10", x.toString())
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testToString0x17ffffffd() {
|
||||
val x = KBigInteger(0x17ffffffdL)
|
||||
assertEquals("0x17ffffffd", x.toString())
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testToString_0x17ead2ffffd() {
|
||||
val x = KBigInteger(-0x17ead2ffffdL)
|
||||
assertEquals("-0x17ead2ffffd", x.toString())
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testToString_0x17ead2ffffd11223344() {
|
||||
val x = KBigInteger(-1, uintArrayOf(0x11223344U, 0xad2ffffdU, 0x17eU ))
|
||||
assertEquals("-0x17ead2ffffd11223344", x.toString())
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testFromString_0x17ead2ffffd11223344() {
|
||||
val x = KBigInteger("0x17ead2ffffd11223344")!!
|
||||
assertEquals( "0x17ead2ffffd11223344", x.toString())
|
||||
}
|
||||
|
||||
@Test
|
||||
fun testFromString_7059135710711894913860() {
|
||||
val x = KBigInteger("-7059135710711894913860")
|
||||
assertEquals("-0x17ead2ffffd11223344", x.toString())
|
||||
}
|
||||
}
|
||||
|
||||
@kotlin.ExperimentalUnsignedTypes
|
||||
class DivisionTests {
|
||||
// TODO
|
||||
@Test
|
||||
fun test_0xfffffffeabcdef01UL_0xfffffffeabc() {
|
||||
val res = KBigInteger(0xfffffffeabcdef01UL) / KBigInteger(0xfffffffeabc)
|
||||
assertEquals(res, KBigInteger(0x100000))
|
||||
|
||||
}
|
||||
|
||||
// println(KBigInteger(+1, uintArrayOf(1000U, 1000U, 1000U)) / KBigInteger(0xfffffffeabc) )
|
||||
// >>> hex((1000 + 1000*2**32 + 1000*2**64)/ 0xfffffffeabc) == 0x3e800000L
|
||||
// println(KBigInteger(+1, KBigInteger.divideMagnitudeByUInt(uintArrayOf(1000U, 1000U, 1000U),456789U)))
|
||||
// 0x8f789719813969L
|
||||
|
||||
}
|
||||
|
||||
class KBigIntegerRingTest {
|
||||
@Test
|
||||
fun testSum() {
|
||||
val res = KBigIntegerRing {
|
||||
KBigInteger(1_000L) * KBigInteger(1_000L)
|
||||
}
|
||||
assertEquals(res, KBigInteger(1_000_000) )
|
||||
}
|
||||
|
||||
@Test
|
||||
fun test_sum_100_000_000__100_000_000() {
|
||||
KBigIntegerRing {
|
||||
val sum = +"100_000_000" + +"100_000_000"
|
||||
assertEquals(sum, KBigInteger("200_000_000"))
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
fun test_mul_3__4() {
|
||||
KBigIntegerRing {
|
||||
val prod = +"0x3000_0000_0000" * +"0x4000_0000_0000_0000_0000"
|
||||
assertEquals(prod, KBigInteger("0xc00_0000_0000_0000_0000_0000_0000_0000"))
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user