jvmMain.DiscordBitSetJvm.kt Maven / Gradle / Ivy

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package dev.kord.common

import java.math.BigInteger
import java.nio.ByteBuffer

internal actual fun formatIntegerFromLittleEndianLongArray(data: LongArray): String {
    // need to convert from little-endian data to big-endian expected by BigInteger
    val buffer = ByteBuffer.allocate(data.size * Long.SIZE_BYTES)
    buffer.asLongBuffer().put(data.reversedArray())
    return BigInteger(/* signum = */ 1, /* magnitude = */ buffer.array()).toString()
}

internal actual fun parseNonNegativeIntegerToBigEndianByteArray(value: String): ByteArray = BigInteger(value)
    .also { if (it.signum() < 0) throw NumberFormatException("Invalid DiscordBitSet format: '$value'") }
    .toByteArray()