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package java.nio
object ByteBuffer {
private final val HashSeed = -547316498 // "java.nio.ByteBuffer".##
def allocate(capacity: Int): ByteBuffer =
wrap(new Array[Byte](capacity))
def allocateDirect(capacity: Int): ByteBuffer =
allocate(capacity)
def wrap(array: Array[Byte], offset: Int, length: Int): ByteBuffer =
HeapByteBuffer.wrap(array, 0, array.length, offset, length, false)
def wrap(array: Array[Byte]): ByteBuffer =
wrap(array, 0, array.length)
}
abstract class ByteBuffer private[nio] (
_capacity: Int, private[nio] val _array: Array[Byte],
private[nio] val _arrayOffset: Int)
extends Buffer(_capacity) with Comparable[ByteBuffer] {
def this(_capacity: Int) = this(_capacity, null, -1)
private var _order: ByteOrder = ByteOrder.BIG_ENDIAN
def slice(): ByteBuffer
def duplicate(): ByteBuffer
def asReadOnlyBuffer(): ByteBuffer
def get(): Byte
def put(b: Byte): ByteBuffer
def get(index: Int): Byte
def put(index: Int, b: Byte): ByteBuffer
def get(dst: Array[Byte], offset: Int, length: Int): ByteBuffer = {
val end = offset + length
if (offset < 0 || length < 0 || end > dst.length)
throw new IndexOutOfBoundsException
if (remaining < length)
throw new BufferUnderflowException
var i = offset
while (i != end) {
dst(i) = get()
i += 1
}
this
}
def get(dst: Array[Byte]): ByteBuffer =
get(dst, 0, dst.length)
def put(src: ByteBuffer): ByteBuffer = {
if (src eq this)
throw new IllegalArgumentException
if (isReadOnly)
throw new ReadOnlyBufferException
if (src.remaining > remaining)
throw new BufferOverflowException
var n = src.remaining
if (src._array != null) { // even if read-only
val pos = src.position
put(src._array, src._arrayOffset + pos, n)
src.position(pos + n)
} else {
while (n != 0) {
put(src.get())
n -= 1
}
}
this
}
def put(src: Array[Byte], offset: Int, length: Int): ByteBuffer = {
val end = offset + length
if (offset < 0 || length < 0 || end > src.length)
throw new IndexOutOfBoundsException
if (isReadOnly)
throw new ReadOnlyBufferException
if (remaining < length)
throw new BufferOverflowException
var i = offset
while (i != end) {
put(src(i))
i += 1
}
this
}
final def put(src: Array[Byte]): ByteBuffer =
put(src, 0, src.length)
@inline final def hasArray(): Boolean = _array != null && !isReadOnly
@inline final def array(): Array[Byte] = {
val a = _array
if (a == null)
throw new UnsupportedOperationException
if (isReadOnly)
throw new ReadOnlyBufferException
a
}
@inline final def arrayOffset(): Int = {
val o = _arrayOffset
if (o == -1)
throw new UnsupportedOperationException
if (isReadOnly)
throw new ReadOnlyBufferException
o
}
def compact(): ByteBuffer
// Not implemented:
//def isDirect(): Boolean
// toString(): String inherited from Buffer
override def hashCode(): Int = {
import scala.util.hashing.MurmurHash3._
val start = position
val end = limit
var h = ByteBuffer.HashSeed
var i = start
while (i != end) {
h = mix(h, get().##)
i += 1
}
position(start)
finalizeHash(h, end-start)
}
override def equals(that: Any): Boolean = that match {
case that: ByteBuffer => compareTo(that) == 0
case _ => false
}
def compareTo(that: ByteBuffer): Int = {
if (this eq that) {
0
} else {
val thisStart = this.position
val thisRemaining = this.remaining
val thatStart = that.position
val thatRemaining = that.remaining
val shortestLength = Math.min(thisRemaining, thatRemaining)
var i = 0
while (i != shortestLength) {
val cmp = this.get().compareTo(that.get())
if (cmp != 0) {
this.position(thisStart)
that.position(thatStart)
return cmp
}
i += 1
}
this.position(thisStart)
that.position(thatStart)
thisRemaining.compareTo(thatRemaining)
}
}
final def order(): ByteOrder = _order
final def order(bo: ByteOrder): ByteBuffer = {
if (bo == null)
throw new NullPointerException
_order = bo
this
}
/* Not implemented:
def getChar(): Char
def putChar(value: Char): ByteBuffer
def getChar(index: Int): Char
def putChar(index: Int, value: Char): ByteBuffer
def asCharBuffer(): CharBuffer
def getShort(): Short
def putShort(value: Short): ByteBuffer
def getShort(index: Int): Short
def putShort(index: Int, value: Short): ByteBuffer
def asShortBuffer(): ShortBuffer
def getInt(): Int
def putInt(value: Int): ByteBuffer
def getInt(index: Int): Int
def putInt(index: Int, value: Int): ByteBuffer
def asIntBuffer(): IntBuffer
def getLong(): Long
def putLong(value: Long): ByteBuffer
def getLong(index: Int): Long
def putLong(index: Int, value: Long): ByteBuffer
def asLongBuffer(): LongBuffer
def getFloat(): Float
def putFloat(value: Float): ByteBuffer
def getFloat(index: Int): Float
def putFloat(index: Int, value: Float): ByteBuffer
def asFloatBuffer(): FloatBuffer
def getDouble(): Double
def putDouble(value: Double): ByteBuffer
def getDouble(index: Int): Double
def putDouble(index: Int, value: Double): ByteBuffer
def asDoubleBuffer(): DoubleBuffer
*/
}
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