forked from kscience/kmath
Split Buffer.kt for better readability
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/*
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* Copyright 2018-2021 KMath contributors.
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* Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
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*/
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package space.kscience.kmath.structures
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/**
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* [MutableBuffer] implementation over [Array].
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*
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* @param T the type of elements contained in the buffer.
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* @property array The underlying array.
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*/
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public class ArrayBuffer<T>(internal val array: Array<T>) : MutableBuffer<T> {
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// Can't inline because array is invariant
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override val size: Int get() = array.size
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override operator fun get(index: Int): T = array[index]
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override operator fun set(index: Int, value: T) {
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array[index] = value
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}
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override operator fun iterator(): Iterator<T> = array.iterator()
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override fun copy(): MutableBuffer<T> = ArrayBuffer(array.copyOf())
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}
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/**
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* Returns an [ArrayBuffer] that wraps the original array.
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*/
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public fun <T> Array<T>.asBuffer(): ArrayBuffer<T> = ArrayBuffer(this)
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@ -98,170 +98,6 @@ public interface Buffer<out T> {
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*/
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public val Buffer<*>.indices: IntRange get() = 0 until size
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/**
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* A generic mutable random-access structure for both primitives and objects.
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*
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* @param T the type of elements contained in the buffer.
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*/
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public interface MutableBuffer<T> : Buffer<T> {
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/**
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* Sets the array element at the specified [index] to the specified [value].
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*/
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public operator fun set(index: Int, value: T)
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/**
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* Returns a shallow copy of the buffer.
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*/
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public fun copy(): MutableBuffer<T>
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public companion object {
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/**
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* Creates a [DoubleBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun double(size: Int, initializer: (Int) -> Double): DoubleBuffer =
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DoubleBuffer(size, initializer)
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/**
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* Creates a [ShortBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun short(size: Int, initializer: (Int) -> Short): ShortBuffer =
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ShortBuffer(size, initializer)
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/**
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* Creates a [IntBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun int(size: Int, initializer: (Int) -> Int): IntBuffer =
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IntBuffer(size, initializer)
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/**
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* Creates a [LongBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun long(size: Int, initializer: (Int) -> Long): LongBuffer =
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LongBuffer(size, initializer)
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/**
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* Creates a [FloatBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun float(size: Int, initializer: (Int) -> Float): FloatBuffer =
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FloatBuffer(size, initializer)
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/**
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* Create a boxing mutable buffer of given type
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*/
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public inline fun <T> boxing(size: Int, initializer: (Int) -> T): MutableBuffer<T> =
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MutableListBuffer(MutableList(size, initializer))
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/**
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* Creates a [MutableBuffer] of given [type]. If the type is primitive, specialized buffers are used
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* ([IntBuffer], [DoubleBuffer], etc.), [ListBuffer] is returned otherwise.
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*
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* The [size] is specified, and each element is calculated by calling the specified [initializer] function.
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*/
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@Suppress("UNCHECKED_CAST")
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public inline fun <T : Any> auto(type: KClass<out T>, size: Int, initializer: (Int) -> T): MutableBuffer<T> =
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when (type) {
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Double::class -> double(size) { initializer(it) as Double } as MutableBuffer<T>
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Short::class -> short(size) { initializer(it) as Short } as MutableBuffer<T>
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Int::class -> int(size) { initializer(it) as Int } as MutableBuffer<T>
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Float::class -> float(size) { initializer(it) as Float } as MutableBuffer<T>
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Long::class -> long(size) { initializer(it) as Long } as MutableBuffer<T>
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else -> boxing(size, initializer)
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}
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/**
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* Creates a [MutableBuffer] of given type [T]. If the type is primitive, specialized buffers are used
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* ([IntBuffer], [DoubleBuffer], etc.), [ListBuffer] is returned otherwise.
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*
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* The [size] is specified, and each element is calculated by calling the specified [initializer] function.
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*/
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@Suppress("UNCHECKED_CAST")
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public inline fun <reified T : Any> auto(size: Int, initializer: (Int) -> T): MutableBuffer<T> =
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auto(T::class, size, initializer)
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}
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}
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/**
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* [Buffer] implementation over [List].
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*
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* @param T the type of elements contained in the buffer.
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* @property list The underlying list.
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*/
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public class ListBuffer<T>(public val list: List<T>) : Buffer<T> {
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public constructor(size: Int, initializer: (Int) -> T) : this(List(size, initializer))
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override val size: Int get() = list.size
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override operator fun get(index: Int): T = list[index]
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override operator fun iterator(): Iterator<T> = list.iterator()
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}
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/**
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* Returns an [ListBuffer] that wraps the original list.
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*/
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public fun <T> List<T>.asBuffer(): ListBuffer<T> = ListBuffer(this)
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/**
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* [MutableBuffer] implementation over [MutableList].
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*
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* @param T the type of elements contained in the buffer.
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* @property list The underlying list.
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*/
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@JvmInline
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public value class MutableListBuffer<T>(public val list: MutableList<T>) : MutableBuffer<T> {
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public constructor(size: Int, initializer: (Int) -> T) : this(MutableList(size, initializer))
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override val size: Int get() = list.size
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override operator fun get(index: Int): T = list[index]
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override operator fun set(index: Int, value: T) {
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list[index] = value
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}
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override operator fun iterator(): Iterator<T> = list.iterator()
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override fun copy(): MutableBuffer<T> = MutableListBuffer(ArrayList(list))
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}
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/**
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* Returns an [MutableListBuffer] that wraps the original list.
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*/
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public fun <T> MutableList<T>.asMutableBuffer(): MutableListBuffer<T> = MutableListBuffer(this)
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/**
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* [MutableBuffer] implementation over [Array].
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*
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* @param T the type of elements contained in the buffer.
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* @property array The underlying array.
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*/
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public class ArrayBuffer<T>(internal val array: Array<T>) : MutableBuffer<T> {
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// Can't inline because array is invariant
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override val size: Int get() = array.size
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override operator fun get(index: Int): T = array[index]
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override operator fun set(index: Int, value: T) {
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array[index] = value
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}
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override operator fun iterator(): Iterator<T> = array.iterator()
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override fun copy(): MutableBuffer<T> = ArrayBuffer(array.copyOf())
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}
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/**
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* Returns an [ArrayBuffer] that wraps the original array.
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*/
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public fun <T> Array<T>.asBuffer(): ArrayBuffer<T> = ArrayBuffer(this)
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/**
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* Immutable wrapper for [MutableBuffer].
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*
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@ -0,0 +1,58 @@
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/*
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* Copyright 2018-2021 KMath contributors.
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* Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
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*/
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package space.kscience.kmath.structures
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import kotlin.jvm.JvmInline
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/**
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* [Buffer] implementation over [List].
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*
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* @param T the type of elements contained in the buffer.
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* @property list The underlying list.
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*/
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public class ListBuffer<T>(public val list: List<T>) : Buffer<T> {
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public constructor(size: Int, initializer: (Int) -> T) : this(List(size, initializer))
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override val size: Int get() = list.size
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override operator fun get(index: Int): T = list[index]
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override operator fun iterator(): Iterator<T> = list.iterator()
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}
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/**
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* Returns an [ListBuffer] that wraps the original list.
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*/
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public fun <T> List<T>.asBuffer(): ListBuffer<T> = ListBuffer(this)
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/**
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* [MutableBuffer] implementation over [MutableList].
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*
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* @param T the type of elements contained in the buffer.
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* @property list The underlying list.
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*/
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@JvmInline
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public value class MutableListBuffer<T>(public val list: MutableList<T>) : MutableBuffer<T> {
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public constructor(size: Int, initializer: (Int) -> T) : this(MutableList(size, initializer))
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override val size: Int get() = list.size
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override operator fun get(index: Int): T = list[index]
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override operator fun set(index: Int, value: T) {
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list[index] = value
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}
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override operator fun iterator(): Iterator<T> = list.iterator()
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override fun copy(): MutableBuffer<T> = MutableListBuffer(ArrayList(list))
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}
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/**
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* Returns an [MutableListBuffer] that wraps the original list.
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*/
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public fun <T> MutableList<T>.asMutableBuffer(): MutableListBuffer<T> = MutableListBuffer(this)
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@ -0,0 +1,97 @@
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/*
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* Copyright 2018-2021 KMath contributors.
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* Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
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*/
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package space.kscience.kmath.structures
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import kotlin.reflect.KClass
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/**
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* A generic mutable random-access structure for both primitives and objects.
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*
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* @param T the type of elements contained in the buffer.
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*/
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public interface MutableBuffer<T> : Buffer<T> {
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/**
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* Sets the array element at the specified [index] to the specified [value].
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*/
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public operator fun set(index: Int, value: T)
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/**
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* Returns a shallow copy of the buffer.
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*/
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public fun copy(): MutableBuffer<T>
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public companion object {
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/**
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* Creates a [DoubleBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun double(size: Int, initializer: (Int) -> Double): DoubleBuffer =
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DoubleBuffer(size, initializer)
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/**
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* Creates a [ShortBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun short(size: Int, initializer: (Int) -> Short): ShortBuffer =
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ShortBuffer(size, initializer)
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/**
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* Creates a [IntBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun int(size: Int, initializer: (Int) -> Int): IntBuffer =
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IntBuffer(size, initializer)
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/**
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* Creates a [LongBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun long(size: Int, initializer: (Int) -> Long): LongBuffer =
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LongBuffer(size, initializer)
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/**
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* Creates a [FloatBuffer] with the specified [size], where each element is calculated by calling the specified
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* [initializer] function.
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*/
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public inline fun float(size: Int, initializer: (Int) -> Float): FloatBuffer =
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FloatBuffer(size, initializer)
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/**
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* Create a boxing mutable buffer of given type
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*/
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public inline fun <T> boxing(size: Int, initializer: (Int) -> T): MutableBuffer<T> =
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MutableListBuffer(MutableList(size, initializer))
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/**
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* Creates a [MutableBuffer] of given [type]. If the type is primitive, specialized buffers are used
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* ([IntBuffer], [DoubleBuffer], etc.), [ListBuffer] is returned otherwise.
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*
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* The [size] is specified, and each element is calculated by calling the specified [initializer] function.
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*/
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@Suppress("UNCHECKED_CAST")
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public inline fun <T : Any> auto(type: KClass<out T>, size: Int, initializer: (Int) -> T): MutableBuffer<T> =
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when (type) {
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Double::class -> double(size) { initializer(it) as Double } as MutableBuffer<T>
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Short::class -> short(size) { initializer(it) as Short } as MutableBuffer<T>
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Int::class -> int(size) { initializer(it) as Int } as MutableBuffer<T>
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Float::class -> float(size) { initializer(it) as Float } as MutableBuffer<T>
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Long::class -> long(size) { initializer(it) as Long } as MutableBuffer<T>
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else -> boxing(size, initializer)
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}
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/**
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* Creates a [MutableBuffer] of given type [T]. If the type is primitive, specialized buffers are used
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* ([IntBuffer], [DoubleBuffer], etc.), [ListBuffer] is returned otherwise.
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*
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* The [size] is specified, and each element is calculated by calling the specified [initializer] function.
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*/
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@Suppress("UNCHECKED_CAST")
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public inline fun <reified T : Any> auto(size: Int, initializer: (Int) -> T): MutableBuffer<T> =
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auto(T::class, size, initializer)
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}
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}
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