/*
* @(#)Direct-X-Buffer.java 1.48 04/05/03
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
// -- This file was mechanically generated: Do not edit! -- //
package java.nio;
import sun.misc.Cleaner;
import sun.misc.Unsafe;
import sun.nio.ch.DirectBuffer;
import sun.nio.ch.FileChannelImpl;
class DirectCharBufferS
extends CharBuffer
implements DirectBuffer
{
// Cached unsafe-access object
protected static final Unsafe unsafe = Bits.unsafe();
// Cached unaligned-access capability
protected static final boolean unaligned = Bits.unaligned();
// Base address, used in all indexing calculations
// NOTE: moved up to Buffer.java for speed in JNI GetDirectBufferAddress
// protected long address;
// If this buffer is a view of another buffer then we keep a reference to
// that buffer so that its memory isn't freed before we're done with it
protected Object viewedBuffer = null;
public Object viewedBuffer() {
return viewedBuffer;
}
public Cleaner cleaner() { return null; }
// For duplicates and slices
//
DirectCharBufferS(DirectBuffer db, // package-private
int mark, int pos, int lim, int cap,
int off)
{
super(mark, pos, lim, cap);
address = db.address() + off;
viewedBuffer = db;
}
public CharBuffer slice() {
int pos = this.position();
int lim = this.limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
int off = (pos << 1);
assert (off >= 0);
return new DirectCharBufferS(this, -1, 0, rem, rem, off);
}
public CharBuffer duplicate() {
return new DirectCharBufferS(this,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
0);
}
public CharBuffer asReadOnlyBuffer() {
return new DirectCharBufferRS(this,
this.markValue(),
this.position(),
this.limit(),
this.capacity(),
0);
}
public long address() {
return address;
}
private long ix(int i) {
return address + (i << 1);
}
public char get() {
return (Bits.swap(unsafe.getChar(ix(nextGetIndex()))));
}
public char get(int i) {
return (Bits.swap(unsafe.getChar(ix(checkIndex(i)))));
}
public CharBuffer get(char[] dst, int offset, int length) {
if ((length << 1) > Bits.JNI_COPY_TO_ARRAY_THRESHOLD) {
checkBounds(offset, length, dst.length);
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
if (length > rem)
throw new BufferUnderflowException();
if (order() != ByteOrder.nativeOrder())
Bits.copyToCharArray(ix(pos), dst,
offset << 1,
length << 1);
else
Bits.copyToByteArray(ix(pos), dst,
offset << 1,
length << 1);
position(pos + length);
} else {
super.get(dst, offset, length);
}
return this;
}
public CharBuffer put(char x) {
unsafe.putChar(ix(nextPutIndex()), Bits.swap((x)));
return this;
}
public CharBuffer put(int i, char x) {
unsafe.putChar(ix(checkIndex(i)), Bits.swap((x)));
return this;
}
public CharBuffer put(CharBuffer src) {
if (src instanceof DirectCharBufferS) {
if (src == this)
throw new IllegalArgumentException();
DirectCharBufferS sb = (DirectCharBufferS)src;
int spos = sb.position();
int slim = sb.limit();
assert (spos <= slim);
int srem = (spos <= slim ? slim - spos : 0);
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
if (srem > rem)
throw new BufferOverflowException();
unsafe.copyMemory(sb.ix(spos), ix(pos), srem << 1);
sb.position(spos + srem);
position(pos + srem);
} else if (!src.isDirect()) {
int spos = src.position();
int slim = src.limit();
assert (spos <= slim);
int srem = (spos <= slim ? slim - spos : 0);
put(src.hb, src.offset + spos, srem);
src.position(spos + srem);
} else {
super.put(src);
}
return this;
}
public CharBuffer put(char[] src, int offset, int length) {
if ((length << 1) > Bits.JNI_COPY_FROM_ARRAY_THRESHOLD) {
checkBounds(offset, length, src.length);
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
if (length > rem)
throw new BufferOverflowException();
if (order() != ByteOrder.nativeOrder())
Bits.copyFromCharArray(src, offset << 1,
ix(pos), length << 1);
else
Bits.copyFromByteArray(src, offset << 1,
ix(pos), length << 1);
position(pos + length);
} else {
super.put(src, offset, length);
}
return this;
}
public CharBuffer compact() {
int pos = position();
int lim = limit();
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
unsafe.copyMemory(ix(pos), ix(0), rem << 1);
position(rem);
limit(capacity());
return this;
}
public boolean isDirect() {
return true;
}
public boolean isReadOnly() {
return false;
}
public String toString(int start, int end) {
if ((end > limit()) || (start > end))
throw new IndexOutOfBoundsException();
try {
int len = end - start;
char[] ca = new char[len];
CharBuffer cb = CharBuffer.wrap(ca);
CharBuffer db = this.duplicate();
db.position(start);
db.limit(end);
cb.put(db);
return new String(ca);
} catch (StringIndexOutOfBoundsException x) {
throw new IndexOutOfBoundsException();
}
}
// --- Methods to support CharSequence ---
public CharSequence subSequence(int start, int end) {
int pos = position();
int lim = limit();
assert (pos <= lim);
pos = (pos <= lim ? pos : lim);
int len = lim - pos;
if ((start < 0) || (end > len) || (start > end))
throw new IndexOutOfBoundsException();
int sublen = end - start;
int off = (pos + start) << 1;
assert (off >= 0);
return new DirectCharBufferS(this, -1, 0, sublen, sublen, off);
}
public ByteOrder order() {
return ((ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN)
? ByteOrder.LITTLE_ENDIAN : ByteOrder.BIG_ENDIAN);
}
}
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