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122
multiplatform-settings/src/linuxX64Main/kotlin/QdbmDepotSettings.kt
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| /* | ||
| * Copyright 2022 Russell Wolf | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package com.russhwolf.settings | ||
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| import com.russhwolf.settings.cinterop.qdbm.depot.DEPOT | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.DP_DOVER | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.DP_OCREAT | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.DP_OREADER | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.DP_OWRITER | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dpclose | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dpecode | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dperrmsg | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dpget | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dpiterinit | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dpiternext | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dpopen | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dpout | ||
| import com.russhwolf.settings.cinterop.qdbm.depot.dpput | ||
| import kotlinx.cinterop.CPointer | ||
| import kotlinx.cinterop.ExperimentalForeignApi | ||
| import kotlinx.cinterop.MemScope | ||
| import kotlinx.cinterop.memScoped | ||
| import kotlinx.cinterop.toKString | ||
|
|
||
| // TODO clean up error checking? | ||
| // TODO allow specifying directory | ||
| @OptIn(ExperimentalForeignApi::class) | ||
| @ExperimentalSettingsImplementation | ||
| public class QdbmDepotSettings(private val path: String) : Settings { | ||
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| override val keys: Set<String> | ||
| get() = depotOperation { depot -> | ||
| depot.foldKeys(mutableListOf<String>()) { list, key -> list.apply { add(key) } }.toSet() | ||
| } | ||
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| override val size: Int get() = depotOperation { depot -> depot.foldKeys(0) { size, _ -> size + 1 } } | ||
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| public override fun clear(): Unit = depotOperation { depot -> depot.forEachKey { dpout(depot, it, -1) } } | ||
| public override fun remove(key: String): Unit = depotOperation { depot -> dpout(depot, key, -1) } | ||
| public override fun hasKey(key: String): Boolean = depotOperation { depot -> | ||
| depot.forEachKey { if (key == it) return true } | ||
| return false | ||
| } | ||
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| public override fun putInt(key: String, value: Int): Unit = saveString(key, value.toString()) | ||
| public override fun getInt(key: String, defaultValue: Int): Int = getIntOrNull(key) ?: defaultValue | ||
| public override fun getIntOrNull(key: String): Int? = loadString(key)?.toInt() | ||
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| public override fun putLong(key: String, value: Long): Unit = saveString(key, value.toString()) | ||
| public override fun getLong(key: String, defaultValue: Long): Long = getLongOrNull(key) ?: defaultValue | ||
| public override fun getLongOrNull(key: String): Long? = loadString(key)?.toLong() | ||
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| public override fun putString(key: String, value: String): Unit = saveString(key, value) | ||
| public override fun getString(key: String, defaultValue: String): String = getStringOrNull(key) ?: defaultValue | ||
| public override fun getStringOrNull(key: String): String? = loadString(key) | ||
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| public override fun putFloat(key: String, value: Float): Unit = saveString(key, value.toString()) | ||
| public override fun getFloat(key: String, defaultValue: Float): Float = getFloatOrNull(key) ?: defaultValue | ||
| public override fun getFloatOrNull(key: String): Float? = loadString(key)?.toFloat() | ||
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| public override fun putDouble(key: String, value: Double): Unit = saveString(key, value.toString()) | ||
| public override fun getDouble(key: String, defaultValue: Double): Double = getDoubleOrNull(key) ?: defaultValue | ||
| public override fun getDoubleOrNull(key: String): Double? = loadString(key)?.toDouble() | ||
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| public override fun putBoolean(key: String, value: Boolean): Unit = saveString(key, value.toString()) | ||
| public override fun getBoolean(key: String, defaultValue: Boolean): Boolean = getBooleanOrNull(key) ?: defaultValue | ||
| public override fun getBooleanOrNull(key: String): Boolean? = loadString(key)?.toBoolean() | ||
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| private inline fun saveString(key: String, value: String): Unit = depotOperation { depot -> | ||
| dpput(depot, key, -1, value, -1, DP_DOVER.toInt()) | ||
| } | ||
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| private inline fun loadString(key: String): String? = depotOperation { depot -> | ||
| val output = dpget(depot, key, -1, 0, -1, null) | ||
| output?.toKString() | ||
| } | ||
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| private inline fun CPointer<DEPOT>.forEachKey(block: (key: String) -> Unit) { | ||
| val depot = this | ||
| if (dpiterinit(depot) != 0) { | ||
| while (true) { | ||
| val key = dpiternext(depot, null)?.toKString() | ||
| if (key != null) { | ||
| block(key) | ||
| } else { | ||
| break | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| private inline fun <A> CPointer<DEPOT>.foldKeys(initial: A, block: (accumulator: A, key: String) -> A): A { | ||
| var accumulator = initial | ||
| forEachKey { accumulator = block(accumulator, it) } | ||
| return accumulator | ||
| } | ||
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| private inline fun <T> depotOperation(action: MemScope.(depot: CPointer<DEPOT>) -> T): T = memScoped { | ||
| val depot = dpopen(path, (DP_OWRITER or DP_OREADER or DP_OCREAT).toInt(), 0) | ||
| if (depot == null) { | ||
| val message = dperrmsg(dpecode)?.toKString() | ||
| error("error on depot open: $message") | ||
| } | ||
| val out = action(depot) | ||
| dpclose(depot) | ||
| out | ||
| } | ||
| } |
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