Igor Yakovlev
38 lines
1.5 KiB
Kotlin
38 lines
1.5 KiB
Kotlin
/*
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* Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language 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/LICENSE.txt file.
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*/
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package kotlin.time
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import kotlin.math.*
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internal actual inline val durationAssertionsEnabled: Boolean get() = true
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@JsFun("(value, decimals) => value.toFixed(decimals)")
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private external fun toFixed(value: Double, decimals: Int): String
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@JsFun("(value, decimals) => value.toPrecision(decimals)")
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private external fun toPrecision(value: Double, decimals: Int): String
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internal actual fun formatToExactDecimals(value: Double, decimals: Int): String {
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val rounded = if (decimals == 0) {
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value
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} else {
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val pow = (10.0).pow(decimals)
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round(abs(value) * pow) / pow * sign(value)
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round(abs(value) * pow) / pow * sign(value)
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}
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return if (abs(rounded) < 1e21) {
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// toFixed switches to scientific format after 1e21
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toFixed(rounded, decimals)
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} else {
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// toPrecision outputs the specified number of digits, but only for positive numbers
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val positive = abs(rounded)
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val positiveString = toPrecision(positive, ceil(log10(positive)).toInt() + decimals)
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if (rounded < 0) "-$positiveString" else positiveString
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}
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}
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@JsFun("(value, decimals) => value.toLocaleString(\"en-us\", ({\"maximumFractionDigits\": decimals}))")
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external internal actual fun formatUpToDecimals(value: Double, decimals: Int): String |