com.jtransc.util.bits.kt Maven / Gradle / Ivy

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JVM AOT compiler currently generating JavaScript, C++, Haxe, with initial focus on Kotlin and games.

There is a newer version: 0.6.8

/*
 * Copyright 2016 Carlos Ballesteros Velasco
 *
 * 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.jtransc.util

object Bits {
	@JvmStatic
	fun mask(count: Int): Int = (1 shl count) - 1

	@JvmStatic
	fun extract(data: Int, offset: Int, length: Int): Int {
		return (data ushr offset) and mask(length)
	}

	@JvmStatic
	fun extractBool(data: Int, offset: Int): Boolean = extract(data, offset, 1) != 0

}

fun Int.extract(offset: Int, length: Int): Int = Bits.extract(this, offset, length)
fun Int.extractBool(offset: Int): Boolean = Bits.extractBool(this, offset)
fun Int.hasBitmask(mask: Int): Boolean = (this and mask) == mask

fun Int.withBool(offset: Int): Int {
	val v = (1 shl offset)
	return (this and v.inv()) or (v)
}

fun Int.withoutBool(offset: Int): Int {
	val v = (1 shl offset)
	return (this and v.inv())
}