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/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (c) 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package com.jogamp.common.nio;
import java.nio.*;
/**
* @author Kenneth Russel, et al.
*/
public class StructAccessor {
private final ByteBuffer bb;
public StructAccessor(final ByteBuffer bb) {
// Setting of byte order is concession to native code which needs
// to instantiate these
this.bb = bb.order(ByteOrder.nativeOrder());
}
public final ByteBuffer getBuffer() {
return bb;
}
/**
* Returns a slice of the current ByteBuffer starting at the
* specified byte offset and extending the specified number of
* bytes. Note that this method is not thread-safe with respect to
* the other methods in this class.
*/
public final ByteBuffer slice(final int byteOffset, final int byteLength) {
bb.position(byteOffset);
bb.limit(byteOffset + byteLength);
final ByteBuffer newBuf = bb.slice().order(bb.order()); // slice and duplicate may change byte order
bb.position(0);
bb.limit(bb.capacity());
return newBuf;
}
/** Retrieves the byte at the specified byteOffset. */
public final byte getByteAt(final int byteOffset) {
return bb.get(byteOffset);
}
/** Puts a byte at the specified byteOffset. */
public final void setByteAt(final int byteOffset, final byte v) {
bb.put(byteOffset, v);
}
/** Retrieves the boolean at the specified byteOffset. */
public final boolean getBooleanAt(final int byteOffset) {
return (byte)0 != bb.get(byteOffset);
}
/** Puts a boolean at the specified byteOffset. */
public final void setBooleanAt(final int byteOffset, final boolean v) {
bb.put(byteOffset, v?(byte)1:(byte)0);
}
/** Retrieves the char at the specified byteOffset. */
public final char getCharAt(final int byteOffset) {
return bb.getChar(byteOffset);
}
/** Puts a char at the specified byteOffset. */
public final void setCharAt(final int byteOffset, final char v) {
bb.putChar(byteOffset, v);
}
/** Retrieves the short at the specified byteOffset. */
public final short getShortAt(final int byteOffset) {
return bb.getShort(byteOffset);
}
/** Puts a short at the specified byteOffset. */
public final void setShortAt(final int byteOffset, final short v) {
bb.putShort(byteOffset, v);
}
/** Retrieves the int at the specified byteOffset. */
public final int getIntAt(final int byteOffset) {
return bb.getInt(byteOffset);
}
/** Puts a int at the specified byteOffset. */
public final void setIntAt(final int byteOffset, final int v) {
bb.putInt(byteOffset, v);
}
/** Retrieves the int at the specified byteOffset. */
public final int getIntAt(final int byteOffset, final int nativeSizeInBytes) {
switch(nativeSizeInBytes) {
case 2:
return bb.getShort(byteOffset) & 0x0000FFFF ;
case 4:
return bb.getInt(byteOffset);
case 8:
return (int) ( bb.getLong(byteOffset) & 0x00000000FFFFFFFFL ) ;
default:
throw new InternalError("invalid nativeSizeInBytes "+nativeSizeInBytes);
}
}
/** Puts a int at the specified byteOffset. */
public final void setIntAt(final int byteOffset, final int v, final int nativeSizeInBytes) {
switch(nativeSizeInBytes) {
case 2:
bb.putShort(byteOffset, (short) ( v & 0x0000FFFF ) );
break;
case 4:
bb.putInt(byteOffset, v);
break;
case 8:
bb.putLong(byteOffset, v & 0x00000000FFFFFFFFL );
break;
default:
throw new InternalError("invalid nativeSizeInBytes "+nativeSizeInBytes);
}
}
/** Retrieves the float at the specified byteOffset. */
public final float getFloatAt(final int byteOffset) {
return bb.getFloat(byteOffset);
}
/** Puts a float at the specified byteOffset. */
public final void setFloatAt(final int byteOffset, final float v) {
bb.putFloat(byteOffset, v);
}
/** Retrieves the double at the specified byteOffset. */
public final double getDoubleAt(final int byteOffset) {
return bb.getDouble(byteOffset);
}
/** Puts a double at the specified byteOffset. */
public final void setDoubleAt(final int byteOffset, final double v) {
bb.putDouble(byteOffset, v);
}
/** Retrieves the long at the specified byteOffset. */
public final long getLongAt(final int byteOffset) {
return bb.getLong(byteOffset);
}
/** Puts a long at the specified byteOffset. */
public final void setLongAt(final int byteOffset, final long v) {
bb.putLong(byteOffset, v);
}
/** Retrieves the long at the specified byteOffset. */
public final long getLongAt(final int byteOffset, final int nativeSizeInBytes) {
switch(nativeSizeInBytes) {
case 4:
return bb.getInt(byteOffset) & 0x00000000FFFFFFFFL;
case 8:
return bb.getLong(byteOffset);
default:
throw new InternalError("invalid nativeSizeInBytes "+nativeSizeInBytes);
}
}
/** Puts a long at the specified byteOffset. */
public final void setLongAt(final int byteOffset, final long v, final int nativeSizeInBytes) {
switch(nativeSizeInBytes) {
case 4:
bb.putInt(byteOffset, (int) ( v & 0x00000000FFFFFFFFL ) );
break;
case 8:
bb.putLong(byteOffset, v);
break;
default:
throw new InternalError("invalid nativeSizeInBytes "+nativeSizeInBytes);
}
}
public final void setBytesAt(int byteOffset, final byte[] v) {
for (int i = 0; i < v.length; i++) {
bb.put(byteOffset++, v[i]);
}
}
public final byte[] getBytesAt(int byteOffset, final byte[] v) {
for (int i = 0; i < v.length; i++) {
v[i] = bb.get(byteOffset++);
}
return v;
}
public final void setBooleansAt(int byteOffset, final boolean[] v) {
for (int i = 0; i < v.length; i++) {
bb.put(byteOffset++, v[i]?(byte)1:(byte)0);
}
}
public final boolean[] getBooleansAt(int byteOffset, final boolean[] v) {
for (int i = 0; i < v.length; i++) {
v[i] = (byte)0 != bb.get(byteOffset++);
}
return v;
}
public final void setCharsAt(int byteOffset, final char[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=2) {
bb.putChar(byteOffset, v[i]);
}
}
public final char[] getCharsAt(int byteOffset, final char[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=2) {
v[i] = bb.getChar(byteOffset);
}
return v;
}
public final void setShortsAt(int byteOffset, final short[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=2) {
bb.putShort(byteOffset, v[i]);
}
}
public final short[] getShortsAt(int byteOffset, final short[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=2) {
v[i] = bb.getShort(byteOffset);
}
return v;
}
public final void setIntsAt(int byteOffset, final int[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=4) {
bb.putInt(byteOffset, v[i]);
}
}
public final int[] getIntsAt(int byteOffset, final int[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=4) {
v[i] = bb.getInt(byteOffset);
}
return v;
}
public final void setFloatsAt(int byteOffset, final float[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=4) {
bb.putFloat(byteOffset, v[i]);
}
}
public final float[] getFloatsAt(int byteOffset, final float[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=4) {
v[i] = bb.getFloat(byteOffset);
}
return v;
}
public final void setDoublesAt(int byteOffset, final double[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=8) {
bb.putDouble(byteOffset, v[i]);
}
}
public final double[] getDoublesAt(int byteOffset, final double[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=8) {
v[i] = bb.getDouble(byteOffset);
}
return v;
}
public final void setLongsAt(int byteOffset, final long[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=8) {
bb.putLong(byteOffset, v[i]);
}
}
public final long[] getLongsAt(int byteOffset, final long[] v) {
for (int i = 0; i < v.length; i++, byteOffset+=8) {
v[i] = bb.getLong(byteOffset);
}
return v;
}
}
