DirectByteBufferImpl.java [plain text]
package java.nio;
import gnu.classpath.Configuration;
import gnu.gcj.RawData;
final class DirectByteBufferImpl extends ByteBuffer
{
static
{
if (Configuration.INIT_LOAD_LIBRARY)
{
System.loadLibrary ("javanio");
}
}
protected Object owner;
RawData address;
private boolean readOnly;
public DirectByteBufferImpl (RawData address, long len)
{
this (null, address, (int) len, (int) len, 0, false);
}
public DirectByteBufferImpl (Object owner, RawData address,
int capacity, int limit,
int position, boolean readOnly)
{
super (capacity, limit, position, -1);
this.address = address;
this.readOnly = readOnly;
this.owner = owner;
}
private static native RawData allocateImpl (int capacity);
private static native void freeImpl (RawData address);
protected void finalize () throws Throwable
{
freeImpl (address);
}
static native byte getImpl (RawData address, int index);
static native void putImpl (RawData address, int index, byte value);
public byte get ()
{
checkForUnderflow();
int pos = position();
byte result = getImpl (address, pos);
position (pos + 1);
return result;
}
public byte get (int index)
{
checkIndex(index);
return getImpl (address, index);
}
static native void getImpl (RawData address, int index,
byte[] dst, int offset, int length);
public ByteBuffer get (byte[] dst, int offset, int length)
{
checkArraySize(dst.length, offset, length);
checkForUnderflow(length);
int index = position();
getImpl(address, index, dst, offset, length);
position(index+length);
return this;
}
public ByteBuffer put (byte value)
{
checkIfReadOnly();
checkForOverflow();
int pos = position();
putImpl (address, pos, value);
position (pos + 1);
return this;
}
public ByteBuffer put (int index, byte value)
{
checkIfReadOnly();
checkIndex(index);
putImpl (address, index, value);
return this;
}
static native void shiftDown(RawData address, int dst_offset, int src_offset, int count);
void shiftDown(int dst_offset, int src_offset, int count)
{
shiftDown(address, dst_offset, src_offset, count);
}
public ByteBuffer compact ()
{
int pos = position();
if (pos > 0)
{
int count = remaining();
shiftDown(address, 0, pos, count);
position(count);
limit(capacity());
}
return this;
}
public static native RawData adjustAddress(RawData address, int offset);
public ByteBuffer slice ()
{
int rem = remaining();
return new DirectByteBufferImpl (owner,
adjustAddress(address, position()),
rem, rem, 0, isReadOnly ());
}
private ByteBuffer duplicate (boolean readOnly)
{
int pos = position();
reset();
int mark = position();
position(pos);
DirectByteBufferImpl result
= new DirectByteBufferImpl (owner, address, capacity (), limit (),
pos, readOnly);
if (mark != pos)
{
result.position(mark);
result.mark();
result.position(pos);
}
return result;
}
public ByteBuffer duplicate ()
{
return duplicate(isReadOnly());
}
public ByteBuffer asReadOnlyBuffer ()
{
return duplicate(true);
}
public boolean isReadOnly ()
{
return readOnly;
}
public boolean isDirect ()
{
return true;
}
public CharBuffer asCharBuffer ()
{
return new CharViewBufferImpl (this, remaining() >> 1);
}
public ShortBuffer asShortBuffer ()
{
return new ShortViewBufferImpl (this, remaining() >> 1);
}
public IntBuffer asIntBuffer ()
{
return new IntViewBufferImpl (this, remaining() >> 2);
}
public LongBuffer asLongBuffer ()
{
return new LongViewBufferImpl (this, remaining() >> 3);
}
public FloatBuffer asFloatBuffer ()
{
return new FloatViewBufferImpl (this, remaining() >> 2);
}
public DoubleBuffer asDoubleBuffer ()
{
return new DoubleViewBufferImpl (this, remaining() >> 3);
}
public char getChar ()
{
return ByteBufferHelper.getChar(this, order());
}
public ByteBuffer putChar (char value)
{
ByteBufferHelper.putChar(this, value, order());
return this;
}
public char getChar (int index)
{
return ByteBufferHelper.getChar(this, index, order());
}
public ByteBuffer putChar (int index, char value)
{
ByteBufferHelper.putChar(this, index, value, order());
return this;
}
public short getShort ()
{
return ByteBufferHelper.getShort(this, order());
}
public ByteBuffer putShort (short value)
{
ByteBufferHelper.putShort(this, value, order());
return this;
}
public short getShort (int index)
{
return ByteBufferHelper.getShort(this, index, order());
}
public ByteBuffer putShort (int index, short value)
{
ByteBufferHelper.putShort(this, index, value, order());
return this;
}
public int getInt ()
{
return ByteBufferHelper.getInt(this, order());
}
public ByteBuffer putInt (int value)
{
ByteBufferHelper.putInt(this, value, order());
return this;
}
public int getInt (int index)
{
return ByteBufferHelper.getInt(this, index, order());
}
public ByteBuffer putInt (int index, int value)
{
ByteBufferHelper.putInt(this, index, value, order());
return this;
}
public long getLong ()
{
return ByteBufferHelper.getLong(this, order());
}
public ByteBuffer putLong (long value)
{
ByteBufferHelper.putLong (this, value, order());
return this;
}
public long getLong (int index)
{
return ByteBufferHelper.getLong (this, index, order());
}
public ByteBuffer putLong (int index, long value)
{
ByteBufferHelper.putLong (this, index, value, order());
return this;
}
public float getFloat ()
{
return ByteBufferHelper.getFloat (this, order());
}
public ByteBuffer putFloat (float value)
{
ByteBufferHelper.putFloat (this, value, order());
return this;
}
public float getFloat (int index)
{
return ByteBufferHelper.getFloat (this, index, order());
}
public ByteBuffer putFloat (int index, float value)
{
ByteBufferHelper.putFloat (this, index, value, order());
return this;
}
public double getDouble ()
{
return ByteBufferHelper.getDouble (this, order());
}
public ByteBuffer putDouble (double value)
{
ByteBufferHelper.putDouble (this, value, order());
return this;
}
public double getDouble (int index)
{
return ByteBufferHelper.getDouble (this, index, order());
}
public ByteBuffer putDouble (int index, double value)
{
ByteBufferHelper.putDouble (this, index, value, order());
return this;
}
}