/*
 * Copyright 2010-2016 JetBrains s.r.o.
 *
 * 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 org.jetbrains.kotlin.incremental.snapshots

import com.intellij.util.io.DataExternalizer
import java.io.DataInput
import java.io.DataOutput

internal object FileSnapshotExternalizer : DataExternalizer<FileSnapshot> {
    override fun save(out: DataOutput, value: FileSnapshot) {
        out.writeLong(value.length)
        out.writeInt(value.hash.size)
        out.write(value.hash)
    }

    override fun read(input: DataInput): FileSnapshot {
        val length = input.readLong()
        val hashSize = input.readInt()
        val hash = ByteArray(hashSize)
        input.readFully(hash)
        return FileSnapshot(length, hash)
    }
}