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core/generated-sources/src/main/kotlin/org/jetbrains/kotlinx/dataframe/impl/CanParseUtils.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| package org.jetbrains.kotlinx.dataframe.impl | ||
|
|
||
| import kotlin.time.Duration | ||
| import kotlin.time.DurationUnit | ||
|
|
||
| /** | ||
| * Checks if the string can be parsed as a duration without throwing an exception. | ||
| * | ||
| * The logic is taken from [Duration.parse] (Kotlin version 2.0.20), | ||
| * so it should return the same result. | ||
| * | ||
| * @param value the string to check | ||
| */ | ||
| internal fun Duration.Companion.canParse(value: String): Boolean { | ||
| var length = value.length | ||
| if (length == 0) return false | ||
| var index = 0 | ||
| val infinityString = "Infinity" | ||
| when (value[index]) { | ||
| '+', '-' -> index++ | ||
| } | ||
| val hasSign = index > 0 | ||
| when { | ||
| length <= index -> return false | ||
|
|
||
| value[index] == 'P' -> { | ||
| if (++index == length) return false | ||
| val nonDigitSymbols = "+-." | ||
| var isTimeComponent = false | ||
| var prevUnit: DurationUnit? = null | ||
| while (index < length) { | ||
| if (value[index] == 'T') { | ||
| if (isTimeComponent || ++index == length) return false | ||
| isTimeComponent = true | ||
| continue | ||
| } | ||
| val component = value.substringWhile(index) { it in '0'..'9' || it in nonDigitSymbols } | ||
| if (component.isEmpty()) return false | ||
| index += component.length | ||
| val unitChar = value.getOrElse(index) { return false } | ||
| index++ | ||
| val unit = durationUnitByIsoCharOrNull(unitChar, isTimeComponent) ?: return false | ||
| if (prevUnit != null && prevUnit <= unit) return false | ||
| prevUnit = unit | ||
| } | ||
| } | ||
|
|
||
| value.regionMatches( | ||
| thisOffset = index, | ||
| other = infinityString, | ||
| otherOffset = 0, | ||
| length = maxOf(length - index, infinityString.length), | ||
| ignoreCase = true, | ||
| ) -> return true | ||
|
|
||
| else -> { | ||
| // parse default string format | ||
| var prevUnit: DurationUnit? = null | ||
| var afterFirst = false | ||
| var allowSpaces = !hasSign | ||
| if (hasSign && value[index] == '(' && value.last() == ')') { | ||
| allowSpaces = true | ||
| if (++index == --length) return false | ||
| } | ||
| while (index < length) { | ||
| if (afterFirst && allowSpaces) { | ||
| index = value.skipWhile(index) { it == ' ' } | ||
| } | ||
| afterFirst = true | ||
| val component = value.substringWhile(index) { it in '0'..'9' || it == '.' } | ||
| if (component.isEmpty()) return false | ||
| index += component.length | ||
| val unitName = value.substringWhile(index) { it in 'a'..'z' } | ||
| index += unitName.length | ||
| val unit = durationUnitByShortNameOrNull(unitName) ?: return false | ||
| if (prevUnit != null && prevUnit <= unit) return false | ||
| prevUnit = unit | ||
| val dotIndex = component.indexOf('.') | ||
| if (dotIndex > 0) { | ||
| if (index < length) return false | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return true | ||
| } | ||
|
|
||
| /** | ||
| * Checks if the string can be parsed as a java duration without throwing an exception. | ||
| */ | ||
| internal fun javaDurationCanParse(value: String): Boolean = isoDurationRegex.matches(value) | ||
|
|
||
| /** | ||
| * regex from [java.time.Duration.Lazy.PATTERN], it represents the ISO-8601 duration format. | ||
| */ | ||
| private val isoDurationRegex = Regex( | ||
| """([-+]?)P(?:([-+]?[0-9]+)D)?(T(?:([-+]?[0-9]+)H)?(?:([-+]?[0-9]+)M)?(?:([-+]?[0-9]+)(?:[.,]([0-9]{0,9}))?S)?)?""", | ||
| RegexOption.IGNORE_CASE, | ||
| ) | ||
|
|
||
| /** | ||
| * Copy of [kotlin.time.substringWhile] (Kotlin version 2.0.20). | ||
| */ | ||
| private inline fun String.substringWhile(startIndex: Int, predicate: (Char) -> Boolean): String = | ||
| substring(startIndex, skipWhile(startIndex, predicate)) | ||
|
|
||
| /** | ||
| * Copy of [kotlin.time.skipWhile] (Kotlin version 2.0.20). | ||
| */ | ||
| private inline fun String.skipWhile(startIndex: Int, predicate: (Char) -> Boolean): Int { | ||
| var i = startIndex | ||
| while (i < length && predicate(this[i])) i++ | ||
| return i | ||
| } | ||
|
|
||
| /** | ||
| * Copy of [kotlin.time.durationUnitByIsoChar] (Kotlin version 2.0.20). | ||
| */ | ||
| private fun durationUnitByIsoCharOrNull(isoChar: Char, isTimeComponent: Boolean): DurationUnit? = | ||
| when { | ||
| !isTimeComponent -> { | ||
| when (isoChar) { | ||
| 'D' -> DurationUnit.DAYS | ||
| else -> null | ||
| } | ||
| } | ||
|
|
||
| else -> { | ||
| when (isoChar) { | ||
| 'H' -> DurationUnit.HOURS | ||
| 'M' -> DurationUnit.MINUTES | ||
| 'S' -> DurationUnit.SECONDS | ||
| else -> null | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Copy of [kotlin.time.durationUnitByShortName] (Kotlin version 2.0.20). | ||
| */ | ||
| private fun durationUnitByShortNameOrNull(shortName: String): DurationUnit? = | ||
| when (shortName) { | ||
| "ns" -> DurationUnit.NANOSECONDS | ||
| "us" -> DurationUnit.MICROSECONDS | ||
| "ms" -> DurationUnit.MILLISECONDS | ||
| "s" -> DurationUnit.SECONDS | ||
| "m" -> DurationUnit.MINUTES | ||
| "h" -> DurationUnit.HOURS | ||
| "d" -> DurationUnit.DAYS | ||
| else -> null | ||
| } |
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