41 lines
1.0 KiB
Kotlin
41 lines
1.0 KiB
Kotlin
package jp.juggler.apng.util
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import java.util.*
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internal class ByteSequenceQueue(private val bufferRecycler :(ByteSequence)->Unit) {
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private val list = LinkedList<ByteSequence>()
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val remain: Int
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get() = list.sumBy { it.length }
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fun add(range: ByteSequence) {
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list.add(range)
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}
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fun clear() {
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for( item in list ){
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bufferRecycler(item)
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}
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list.clear()
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}
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fun readBytes(dst: ByteArray, offset: Int, length: Int): Int {
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var nRead = 0
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while (nRead < length && list.isNotEmpty()) {
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val item = list.first()
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if (item.length <= 0) {
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bufferRecycler(item)
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list.removeFirst()
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continue
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}
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val delta = Math.min(item.length, length - nRead)
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System.arraycopy(item.array, item.offset, dst, offset + nRead, delta)
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item.offset += delta
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item.length -= delta
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nRead += delta
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}
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return nRead
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}
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}
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