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/*
 * Copyright (c) 2017 ligi. Use of this source code is governed by the MIT License.
 * Original: https://github.com/komputing/KHash/blob/master/keccak/src/main/kotlin/org/komputing/khash/keccak/extensions/IntArrayExtensions.kt
 */

package dev.icerock.moko.web3.crypto

/**
 * Assigns the specified int value to each element of the specified
 * range of the specified array of ints.  The range to be filled
 * extends from index fromIndex, inclusive, to index
 * toIndex, exclusive.  (If fromIndex==toIndex, the
 * range to be filled is empty.)
 *
 * @param fromIndex the index of the first element (inclusive) to be
 *        filled with the specified value
 * @param toIndex the index of the last element (exclusive) to be
 *        filled with the specified value
 * @param value the value to be stored in all elements of the array
 * @throws IllegalArgumentException if fromIndex > toIndex
 * @throws ArrayIndexOutOfBoundsException if fromIndex < 0 or
 *         toIndex > a.length
 */
internal fun IntArray.fillWith(value: Int, fromIndex: Int = 0, toIndex: Int = this.size) {
    if (fromIndex > toIndex) {
        throw IllegalArgumentException(
            "fromIndex($fromIndex) > toIndex($toIndex)"
        )
    }

    if (fromIndex < 0) {
        throw ArrayIndexOutOfBoundsException(fromIndex)
    }
    if (toIndex > this.size) {
        throw ArrayIndexOutOfBoundsException(toIndex)
    }

    for (i in fromIndex until toIndex)
        this[i] = value
}

/**
 * Constructs a new [ArrayIndexOutOfBoundsException]
 * class with an argument indicating the illegal index.
 * @param index the illegal index.
 */
internal class ArrayIndexOutOfBoundsException(index: Int) : Throwable("Array index out of range: $index")