commonMain.fr.acinq.bitcoin.io.Input.kt Maven / Gradle / Ivy
/*
* Copyright 2020 ACINQ SAS
*
* 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 fr.acinq.bitcoin.io
public interface Input {
public val availableBytes: Int
public fun read(): Int
public fun read(b: ByteArray, offset: Int = 0, length: Int = b.size - offset): Int
}
/** Read bytes from the input. Return null if the input is too small. */
public fun Input.readNBytes(n: Int): ByteArray? = if (availableBytes < n) null else ByteArray(n).also { read(it, 0, n) }