0 if the given buffer is null.
* @see #typeNameToBufferClass(String)
* @see #sizeOfBufferElem(Object)
*/
public static int sizeOfBufferElem(final Class bufferClz) {
if (bufferClz == null) {
return 0;
}
if (ByteBuffer.class.isAssignableFrom(bufferClz)) {
return SIZEOF_BYTE;
} else if (ShortBuffer.class.isAssignableFrom(bufferClz)) {
return SIZEOF_SHORT;
} else if (CharBuffer.class.isAssignableFrom(bufferClz)) {
return SIZEOF_CHAR;
} else if (IntBuffer.class.isAssignableFrom(bufferClz)) {
return SIZEOF_INT;
} else if (FloatBuffer.class.isAssignableFrom(bufferClz)) {
return SIZEOF_FLOAT;
} else if (LongBuffer.class.isAssignableFrom(bufferClz)) {
return SIZEOF_LONG;
} else if (DoubleBuffer.class.isAssignableFrom(bufferClz)) {
return SIZEOF_DOUBLE;
}
throw new RuntimeException("Unexpected buffer type " + bufferClz.getName());
}
/**
* Returns the size of a single element of the given buffer in bytes
* or 0 if the given buffer is null.
* @see #sizeOfBufferElem(Class)
*/
public static int sizeOfBufferElem(final Object buffer) {
if (buffer == null) {
return 0;
}
if (buffer instanceof ByteBuffer) {
return SIZEOF_BYTE;
} else if (buffer instanceof IntBuffer) {
return SIZEOF_INT;
} else if (buffer instanceof ShortBuffer) {
return SIZEOF_SHORT;
} else if (buffer instanceof FloatBuffer) {
return SIZEOF_FLOAT;
} else if (buffer instanceof DoubleBuffer) {
return SIZEOF_DOUBLE;
} else if (buffer instanceof LongBuffer) {
return SIZEOF_LONG;
} else if (buffer instanceof CharBuffer) {
return SIZEOF_CHAR;
} else if (buffer instanceof NativeBuffer) {
return ((NativeBuffer) buffer).elementSize();
}
throw new RuntimeException("Unexpected buffer type " + buffer.getClass().getName());
}
/**
* Returns the number of remaining elements of the given anonymous buffer.
*
* @param buffer Anonymous Buffer of type {@link NativeBuffer} or a derivation of {@link Buffer}.
* @return If buffer is null, returns 0, otherwise the remaining size in elements.
* @throws IllegalArgumentException if buffer is of invalid type.
*/
public static int remainingElem(final Object buffer) throws IllegalArgumentException {
if (buffer == null) {
return 0;
}
if (buffer instanceof Buffer) {
return ((Buffer) buffer).remaining();
} else if (buffer instanceof NativeBuffer) {
return ((NativeBuffer) buffer).remaining();
} else {
throw new IllegalArgumentException("Unsupported anonymous buffer type: "+buffer.getClass().getCanonicalName());
}
}
/**
* Returns the number of remaining bytes of the given anonymous buffer.
*
* @param buffer Anonymous Buffer of type {@link NativeBuffer} or a derivation of {@link Buffer}.
* @return If buffer is null, returns 0, otherwise the remaining size in bytes.
* @throws IllegalArgumentException if buffer is of invalid type.
*/
public static int remainingBytes(final Object buffer) throws IllegalArgumentException {
if (buffer == null) {
return 0;
}
final int bytesRemaining;
if (buffer instanceof Buffer) {
final int elementsRemaining = ((Buffer) buffer).remaining();
if (buffer instanceof ByteBuffer) {
bytesRemaining = elementsRemaining;
} else if (buffer instanceof FloatBuffer) {
bytesRemaining = elementsRemaining * SIZEOF_FLOAT;
} else if (buffer instanceof IntBuffer) {
bytesRemaining = elementsRemaining * SIZEOF_INT;
} else if (buffer instanceof ShortBuffer) {
bytesRemaining = elementsRemaining * SIZEOF_SHORT;
} else if (buffer instanceof DoubleBuffer) {
bytesRemaining = elementsRemaining * SIZEOF_DOUBLE;
} else if (buffer instanceof LongBuffer) {
bytesRemaining = elementsRemaining * SIZEOF_LONG;
} else if (buffer instanceof CharBuffer) {
bytesRemaining = elementsRemaining * SIZEOF_CHAR;
} else {
throw new InternalError("Unsupported Buffer type: "+buffer.getClass().getCanonicalName());
}
} else if (buffer instanceof NativeBuffer) {
final NativeBuffer nb = (NativeBuffer) buffer;
bytesRemaining = nb.remaining() * nb.elementSize();
} else {
throw new IllegalArgumentException("Unsupported anonymous buffer type: "+buffer.getClass().getCanonicalName());
}
return bytesRemaining;
}
/**
* Helper routine to tell whether a buffer is direct or not. Null
* pointers are considered direct.
*/
public static boolean isDirect(final Object buf) {
if (buf == null) {
return true;
}
if (buf instanceof Buffer) {
return ((Buffer) buf).isDirect();
} else if (buf instanceof PointerBuffer) {
return ((PointerBuffer) buf).isDirect();
}
throw new IllegalArgumentException("Unexpected buffer type " + buf.getClass().getName());
}
/**
* Helper routine to get the Buffer byte offset by taking into
* account the Buffer position and the underlying type. This is
* the total offset for Direct Buffers.
*/
public static int getDirectBufferByteOffset(final Object buf) {
if (buf == null) {
return 0;
}
if (buf instanceof Buffer) {
final int pos = ((Buffer) buf).position();
if (buf instanceof ByteBuffer) {
return pos;
} else if (buf instanceof FloatBuffer) {
return pos * SIZEOF_FLOAT;
} else if (buf instanceof IntBuffer) {
return pos * SIZEOF_INT;
} else if (buf instanceof ShortBuffer) {
return pos * SIZEOF_SHORT;
} else if (buf instanceof DoubleBuffer) {
return pos * SIZEOF_DOUBLE;
} else if (buf instanceof LongBuffer) {
return pos * SIZEOF_LONG;
} else if (buf instanceof CharBuffer) {
return pos * SIZEOF_CHAR;
}
} else if (buf instanceof NativeBuffer) {
final NativeBuffer nb = (NativeBuffer) buf;
return nb.position() * nb.elementSize() ;
}
throw new IllegalArgumentException("Disallowed array backing store type in buffer " + buf.getClass().getName());
}
/**
* Helper routine to return the array backing store reference from
* a Buffer object.
* @throws UnsupportedOperationException if the passed Object does not have an array backing store
* @throws IllegalArgumentException if the passed Object is neither of type {@link java.nio.Buffer} or {@link NativeBuffer}.
*/
public static Object getArray(final Object buf) throws UnsupportedOperationException, IllegalArgumentException {
if (buf == null) {
return null;
}
if (buf instanceof Buffer) {
return ((Buffer) buf).array();
} else if (buf instanceof NativeBuffer) {
return ((NativeBuffer) buf).array();
}
throw new IllegalArgumentException("Disallowed array backing store type in buffer " + buf.getClass().getName());
}
/**
* Helper routine to get the full byte offset from the beginning of
* the array that is the storage for the indirect Buffer
* object. The array offset also includes the position offset
* within the buffer, in addition to any array offset.
*/
public static int getIndirectBufferByteOffset(final Object buf) {
if (buf == null) {
return 0;
}
if (buf instanceof Buffer) {
final int pos = ((Buffer) buf).position();
if (buf instanceof ByteBuffer) {
return (((ByteBuffer) buf).arrayOffset() + pos);
} else if (buf instanceof FloatBuffer) {
return (SIZEOF_FLOAT * (((FloatBuffer) buf).arrayOffset() + pos));
} else if (buf instanceof IntBuffer) {
return (SIZEOF_INT * (((IntBuffer) buf).arrayOffset() + pos));
} else if (buf instanceof ShortBuffer) {
return (SIZEOF_SHORT * (((ShortBuffer) buf).arrayOffset() + pos));
} else if (buf instanceof DoubleBuffer) {
return (SIZEOF_DOUBLE * (((DoubleBuffer) buf).arrayOffset() + pos));
} else if (buf instanceof LongBuffer) {
return (SIZEOF_LONG * (((LongBuffer) buf).arrayOffset() + pos));
} else if (buf instanceof CharBuffer) {
return (SIZEOF_CHAR * (((CharBuffer) buf).arrayOffset() + pos));
}
} else if (buf instanceof NativeBuffer) {
final NativeBuffer nb = (NativeBuffer) buf;
return nb.elementSize() * ( nb.arrayOffset() + nb.position() );
}
throw new IllegalArgumentException("Unknown buffer type " + buf.getClass().getName());
}
//----------------------------------------------------------------------
// Slice routines (mapping buffer to typed-buffer w/o copy)
//
/**
* Calls slice on the specified buffer while maintaining the byteorder.
* @see #slice(java.nio.Buffer, int, int)
*/
@SuppressWarnings("unchecked")
public static B slice(final B buffer) {
if (buffer instanceof ByteBuffer) {
final ByteBuffer bb = (ByteBuffer) buffer;
return (B) bb.slice().order(bb.order()); // slice and duplicate may change byte order
} else if (buffer instanceof IntBuffer) {
return (B) ((IntBuffer) buffer).slice();
} else if (buffer instanceof ShortBuffer) {
return (B) ((ShortBuffer) buffer).slice();
} else if (buffer instanceof FloatBuffer) {
return (B) ((FloatBuffer) buffer).slice();
} else if (buffer instanceof DoubleBuffer) {
return (B) ((DoubleBuffer) buffer).slice();
} else if (buffer instanceof LongBuffer) {
return (B) ((LongBuffer) buffer).slice();
} else if (buffer instanceof CharBuffer) {
return (B) ((CharBuffer) buffer).slice();
}
throw new IllegalArgumentException("unexpected buffer type: " + buffer.getClass());
}
/**
* Slices the specified buffer with offset as position and offset+size as limit
* while maintaining the byteorder.
* Concurrency warning: this method changes the buffers position and limit but
* will restore it before return.
*/
public static B slice(final B buffer, final int offset, final int size) {
final int pos = buffer.position();
final int limit = buffer.limit();
B slice = null;
try {
buffer.position(offset).limit(offset+size);
slice = slice(buffer);
} finally {
buffer.position(pos).limit(limit);
}
return slice;
}
/**
* Slices a ByteBuffer or a FloatBuffer to a FloatBuffer
* at the given `elementStartPos` with the given `elementCount` in float-space.
*
* The returned sliced buffer's start position is zero.
*
*
* The returned sliced buffer is {@link FloatBuffer#mark() marked} at it's {@link FloatBuffer#position() start position}. Hence
* {@link FloatBuffer#reset()} will rewind it to start after applying relative operations like {@link FloatBuffer#get()}.
*
*
* Using a ByteBuffer as the source guarantees
* keeping the source native order programmatically.
* This works around Honeycomb / Android 3.0 Issue 16434.
* This bug is resolved at least in Android 3.2.
*
*
* @param buf source Buffer, maybe ByteBuffer (recommended) or FloatBuffer.
* Buffer's position is ignored and `elementStartPos` is being used.
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_FLOAT}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_FLOAT}
* @return FloatBuffer w/ native byte order as given ByteBuffer
*/
public static final FloatBuffer slice2Float(final Buffer buf, final int elementStartPos, final int elementCount) {
if( null == buf ) {
throw new IllegalArgumentException("Buffer is null");
}
final int pos = buf.position();
final int limit = buf.limit();
final FloatBuffer res;
try {
if(buf instanceof ByteBuffer) {
final ByteBuffer bb = (ByteBuffer) buf;
bb.position( elementStartPos * Buffers.SIZEOF_FLOAT );
bb.limit( (elementStartPos + elementCount) * Buffers.SIZEOF_FLOAT );
res = bb.slice().order(bb.order()).asFloatBuffer(); // slice and duplicate may change byte order
} else if(buf instanceof FloatBuffer) {
final FloatBuffer fb = (FloatBuffer) buf;
fb.position( elementStartPos );
fb.limit( elementStartPos + elementCount );
res = fb.slice(); // slice and duplicate may change byte order
} else {
throw new IllegalArgumentException("Buffer not ByteBuffer, nor FloarBuffer, nor backing array given");
}
} finally {
buf.position(pos).limit(limit);
}
res.mark();
return res;
}
/**
* Slices a primitive float backing array to a FloatBuffer at the given `elementStartPos` with the given `elementCount`
* in float-space by {@link FloatBuffer#wrap(float[], int, int) wrapping} the backing array.
*
* Due to {@link FloatBuffer#wrap(float[], int, int) wrapping} the backing array,
* the returned sliced buffer's {@link FloatBuffer#position() start position} equals
* the given floatStartPos within the given backing array
* while it's {@link FloatBuffer#arrayOffset() array-offset} is zero.
* This has the advantage of being able to dismiss the {@link FloatBuffer#arrayOffset() array-offset}
* in user code, while only being required to consider it's {@link FloatBuffer#position() position}.
*
*
* The returned sliced buffer is {@link FloatBuffer#mark() marked} at it's {@link FloatBuffer#position() start position}. Hence
* {@link FloatBuffer#reset()} will rewind it to start after applying relative operations like {@link FloatBuffer#get()}.
*
*
* @param backing source float array
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_FLOAT}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_FLOAT}
* @return FloatBuffer w/ native byte order as given ByteBuffer
*/
public static final FloatBuffer slice2Float(final float[] backing, final int elementStartPos, final int elementCount) {
return (FloatBuffer) FloatBuffer.wrap(backing, elementStartPos, elementCount).mark();
}
/**
* Slices a ByteBuffer or a ShortBuffer to a ShortBuffer
* at the given `elementStartPos` with the given `elementCount` in short-space.
*
* The returned sliced buffer's start position is zero.
*
*
* See {@link #slice2Float(Buffer, int, int)} for details.
*
*
* @param buf source Buffer, maybe ByteBuffer (recommended) or ShortBuffer.
* Buffer's position is ignored and `elementStartPos` is being used.
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_SHORT}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_SHORT}
* @return ShortBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(Buffer, int, int)
*/
public static final ShortBuffer slice2Short(final Buffer buf, final int elementStartPos, final int elementCount) {
if( null == buf ) {
throw new IllegalArgumentException("Buffer is null");
}
final int pos = buf.position();
final int limit = buf.limit();
final ShortBuffer res;
try {
if(buf instanceof ByteBuffer) {
final ByteBuffer bb = (ByteBuffer) buf;
bb.position( elementStartPos * Buffers.SIZEOF_SHORT );
bb.limit( (elementStartPos + elementCount) * Buffers.SIZEOF_SHORT );
res = bb.slice().order(bb.order()).asShortBuffer(); // slice and duplicate may change byte order
} else if(buf instanceof ShortBuffer) {
final ShortBuffer fb = (ShortBuffer) buf;
fb.position( elementStartPos );
fb.limit( elementStartPos + elementCount );
res = fb.slice(); // slice and duplicate may change byte order
} else {
throw new IllegalArgumentException("Buffer not ByteBuffer, nor ShortBuffer");
}
} finally {
buf.position(pos).limit(limit);
}
res.mark();
return res;
}
/**
* Slices a primitive float backing array to a ShortBuffer at the given `elementStartPos` with the given `elementCount`
* in short-space by {@link ShortBuffer#wrap(float[], int, int) wrapping} the backing array.
*
* See {@link #slice2Float(float[], int, int)} for details.
*
* @param backing source float array
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_SHORT}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_SHORT}
* @return ShortBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(float[], int, int)
*/
public static final ShortBuffer slice2Short(final short[] backing, final int elementStartPos, final int elementCount) {
return (ShortBuffer) ShortBuffer.wrap(backing, elementStartPos, elementCount).mark();
}
/**
* Slices a ByteBuffer or a CharBuffer to a CharBuffer
* at the given `elementStartPos` with the given `elementCount` in short-space.
*
* The returned sliced buffer's start position is zero.
*
*
* See {@link #slice2Float(Buffer, int, int)} for details.
*
*
* @param buf source Buffer, maybe ByteBuffer (recommended) or CharBuffer.
* Buffer's position is ignored and `elementStartPos` is being used.
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_CHAR}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_CHAR}
* @return CharBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(Buffer, int, int)
*/
public static final CharBuffer slice2Char(final Buffer buf, final int elementStartPos, final int elementCount) {
if( null == buf ) {
throw new IllegalArgumentException("Buffer is null");
}
final int pos = buf.position();
final int limit = buf.limit();
final CharBuffer res;
try {
if(buf instanceof ByteBuffer) {
final ByteBuffer bb = (ByteBuffer) buf;
bb.position( elementStartPos * Buffers.SIZEOF_CHAR );
bb.limit( (elementStartPos + elementCount) * Buffers.SIZEOF_CHAR );
res = bb.slice().order(bb.order()).asCharBuffer(); // slice and duplicate may change byte order
} else if(buf instanceof CharBuffer) {
final CharBuffer fb = (CharBuffer) buf;
fb.position( elementStartPos );
fb.limit( elementStartPos + elementCount );
res = fb.slice(); // slice and duplicate may change byte order
} else {
throw new IllegalArgumentException("Buffer not ByteBuffer, nor CharBuffer");
}
} finally {
buf.position(pos).limit(limit);
}
res.mark();
return res;
}
/**
* Slices a primitive float backing array to a CharBuffer at the given `elementStartPos` with the given `elementCount`
* in short-space by {@link CharBuffer#wrap(float[], int, int) wrapping} the backing array.
*
* See {@link #slice2Float(float[], int, int)} for details.
*
* @param backing source float array
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_CHAR}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_CHAR}
* @return CharBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(float[], int, int)
*/
public static final CharBuffer slice2Char(final char[] backing, final int elementStartPos, final int elementCount) {
return (CharBuffer) CharBuffer.wrap(backing, elementStartPos, elementCount).mark();
}
/**
* Slices a ByteBuffer or a IntBuffer to a IntBuffer
* at the given `elementStartPos` with the given `elementCount` in int-space.
*
* The returned sliced buffer's start position is zero.
*
*
* See {@link #slice2Float(Buffer, int, int)} for details.
*
*
* @param buf source Buffer, maybe ByteBuffer (recommended) or IntBuffer.
* Buffer's position is ignored and `elementStartPos` is being used.
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_INT}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_INT}
* @return IntBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(Buffer, int, int)
*/
public static final IntBuffer slice2Int(final Buffer buf, final int elementStartPos, final int elementCount) {
if( null == buf ) {
throw new IllegalArgumentException("Buffer is null");
}
final int pos = buf.position();
final int limit = buf.limit();
final IntBuffer res;
try {
if(buf instanceof ByteBuffer) {
final ByteBuffer bb = (ByteBuffer) buf;
bb.position( elementStartPos * Buffers.SIZEOF_INT );
bb.limit( (elementStartPos + elementCount) * Buffers.SIZEOF_INT );
res = bb.slice().order(bb.order()).asIntBuffer(); // slice and duplicate may change byte order
} else if(buf instanceof IntBuffer) {
final IntBuffer fb = (IntBuffer) buf;
fb.position( elementStartPos );
fb.limit( elementStartPos + elementCount );
res = fb.slice(); // slice and duplicate may change byte order
} else {
throw new IllegalArgumentException("Buffer not ByteBuffer, nor IntBuffer");
}
} finally {
buf.position(pos).limit(limit);
}
res.mark();
return res;
}
/**
* Slices a primitive float backing array to a IntBuffer at the given `elementStartPos` with the given `elementCount`
* in int-space by {@link IntBuffer#wrap(float[], int, int) wrapping} the backing array.
*
* See {@link #slice2Float(float[], int, int)} for details.
*
* @param backing source float array
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_INT}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_INT}
* @return IntBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(float[], int, int)
*/
public static final IntBuffer slice2Int(final int[] backing, final int elementStartPos, final int elementCount) {
return (IntBuffer) IntBuffer.wrap(backing, elementStartPos, elementCount).mark();
}
/**
* Slices a ByteBuffer or a LongBuffer to a LongBuffer
* at the given `elementStartPos` with the given `elementCount` in long-space.
*
* The returned sliced buffer's start position is zero.
*
*
* See {@link #slice2Float(Buffer, int, int)} for details.
*
*
* @param buf source Buffer, maybe ByteBuffer (recommended) or LongBuffer.
* Buffer's position is ignored and `elementStartPos` is being used.
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_LONG}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_LONG}
* @return LongBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(Buffer, int, int)
*/
public static final LongBuffer slice2Long(final Buffer buf, final int elementStartPos, final int elementCount) {
if( null == buf ) {
throw new IllegalArgumentException("Buffer is null");
}
final int pos = buf.position();
final int limit = buf.limit();
final LongBuffer res;
try {
if(buf instanceof ByteBuffer) {
final ByteBuffer bb = (ByteBuffer) buf;
bb.position( elementStartPos * Buffers.SIZEOF_LONG );
bb.limit( (elementStartPos + elementCount) * Buffers.SIZEOF_LONG );
res = bb.slice().order(bb.order()).asLongBuffer(); // slice and duplicate may change byte order
} else if(buf instanceof LongBuffer) {
final LongBuffer fb = (LongBuffer) buf;
fb.position( elementStartPos );
fb.limit( elementStartPos + elementCount );
res = fb.slice(); // slice and duplicate may change byte order
} else {
throw new IllegalArgumentException("Buffer not ByteBuffer, nor LongBuffer");
}
} finally {
buf.position(pos).limit(limit);
}
res.mark();
return res;
}
/**
* Slices a primitive float backing array to a LongBuffer at the given `elementStartPos` with the given `elementCount`
* in long-space by {@link LongBuffer#wrap(float[], int, int) wrapping} the backing array.
*
* See {@link #slice2Float(float[], int, int)} for details.
*
* @param backing source float array
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_LONG}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_LONG}
* @return LongBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(float[], int, int)
*/
public static final LongBuffer slice2Long(final long[] backing, final int elementStartPos, final int elementCount) {
return (LongBuffer) LongBuffer.wrap(backing, elementStartPos, elementCount).mark();
}
/**
* Slices a ByteBuffer or a DoubleBuffer to a DoubleBuffer
* at the given `elementStartPos` with the given `elementCount` in double-space.
*
* The returned sliced buffer's start position is zero.
*
*
* See {@link #slice2Float(Buffer, int, int)} for details.
*
*
* @param buf source Buffer, maybe ByteBuffer (recommended) or DoubleBuffer.
* Buffer's position is ignored and `elementStartPos` is being used.
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_DOUBLE}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_DOUBLE}
* @return DoubleBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(Buffer, int, int)
*/
public static final DoubleBuffer slice2Double(final Buffer buf, final int elementStartPos, final int elementCount) {
if( null == buf ) {
throw new IllegalArgumentException("Buffer is null");
}
final int pos = buf.position();
final int limit = buf.limit();
final DoubleBuffer res;
try {
if(buf instanceof ByteBuffer) {
final ByteBuffer bb = (ByteBuffer) buf;
bb.position( elementStartPos * Buffers.SIZEOF_DOUBLE );
bb.limit( (elementStartPos + elementCount) * Buffers.SIZEOF_DOUBLE );
res = bb.slice().order(bb.order()).asDoubleBuffer(); // slice and duplicate may change byte order
} else if(buf instanceof DoubleBuffer) {
final DoubleBuffer fb = (DoubleBuffer) buf;
fb.position( elementStartPos );
fb.limit( elementStartPos + elementCount );
res = fb.slice(); // slice and duplicate may change byte order
} else {
throw new IllegalArgumentException("Buffer not ByteBuffer, nor DoubleBuffer");
}
} finally {
buf.position(pos).limit(limit);
}
res.mark();
return res;
}
/**
* Slices a primitive float backing array to a DoubleBuffer at the given `elementStartPos` with the given `elementCount`
* in double-space by {@link DoubleBuffer#wrap(float[], int, int) wrapping} the backing array.
*
* See {@link #slice2Float(float[], int, int)} for details.
*
* @param backing source float array
* @param elementStartPos element start position w/ element of size {@link Buffers#SIZEOF_DOUBLE}
* @param elementCount element count for element of size {@link Buffers#SIZEOF_DOUBLE}
* @return DoubleBuffer w/ native byte order as given ByteBuffer
* @see #slice2Float(float[], int, int)
*/
public static final DoubleBuffer slice2Double(final double[] backing, final int elementStartPos, final int elementCount) {
return (DoubleBuffer) DoubleBuffer.wrap(backing, elementStartPos, elementCount).mark();
}
//----------------------------------------------------------------------
// Copy routines (type-to-type)
//
/**
* Copies the remaining elements (as defined by
* limit() - position()) in the passed ByteBuffer into
* a newly-allocated direct ByteBuffer. The returned buffer will
* have its byte order set to the host platform's native byte
* order. The position of the newly-allocated buffer will be zero,
* and the position of the passed buffer is unchanged.
*/
public static ByteBuffer copyByteBuffer(final ByteBuffer orig) {
final int op0 = orig.position();
final ByteBuffer dest = newDirectByteBuffer(orig.remaining());
dest.put(orig);
dest.rewind();
orig.position(op0);
return dest;
}
/**
* Copies the remaining elements (as defined by
* limit() - position()) in the passed FloatBuffer
* into a newly-allocated direct FloatBuffer. The returned buffer
* will have its byte order set to the host platform's native byte
* order. The position of the newly-allocated buffer will be zero,
* and the position of the passed buffer is unchanged.
*/
public static FloatBuffer copyFloatBuffer(final FloatBuffer orig) {
return copyFloatBufferAsByteBuffer(orig).asFloatBuffer();
}
/**
* Copies the remaining elements (as defined by
* limit() - position()) in the passed IntBuffer
* into a newly-allocated direct IntBuffer. The returned buffer
* will have its byte order set to the host platform's native byte
* order. The position of the newly-allocated buffer will be zero,
* and the position of the passed buffer is unchanged.
*/
public static IntBuffer copyIntBuffer(final IntBuffer orig) {
return copyIntBufferAsByteBuffer(orig).asIntBuffer();
}
/**
* Copies the remaining elements (as defined by
* limit() - position()) in the passed ShortBuffer
* into a newly-allocated direct ShortBuffer. The returned buffer
* will have its byte order set to the host platform's native byte
* order. The position of the newly-allocated buffer will be zero,
* and the position of the passed buffer is unchanged.
*/
public static ShortBuffer copyShortBuffer(final ShortBuffer orig) {
return copyShortBufferAsByteBuffer(orig).asShortBuffer();
}
//----------------------------------------------------------------------
// Copy routines (type-to-ByteBuffer)
//
/**
* Copies the remaining elements (as defined by
* limit() - position()) in the passed FloatBuffer
* into a newly-allocated direct ByteBuffer. The returned buffer
* will have its byte order set to the host platform's native byte
* order. The position of the newly-allocated buffer will be zero,
* and the position of the passed buffer is unchanged.
*/
public static ByteBuffer copyFloatBufferAsByteBuffer(final FloatBuffer orig) {
final int op0 = orig.position();
final ByteBuffer dest = newDirectByteBuffer(orig.remaining() * SIZEOF_FLOAT);
dest.asFloatBuffer().put(orig);
dest.rewind();
orig.position(op0);
return dest;
}
/**
* Copies the remaining elements (as defined by
* limit() - position()) in the passed IntBuffer into
* a newly-allocated direct ByteBuffer. The returned buffer will
* have its byte order set to the host platform's native byte
* order. The position of the newly-allocated buffer will be zero,
* and the position of the passed buffer is unchanged.
*/
public static ByteBuffer copyIntBufferAsByteBuffer(final IntBuffer orig) {
final int op0 = orig.position();
final ByteBuffer dest = newDirectByteBuffer(orig.remaining() * SIZEOF_INT);
dest.asIntBuffer().put(orig);
dest.rewind();
orig.position(op0);
return dest;
}
/**
* Copies the remaining elements (as defined by
* limit() - position()) in the passed ShortBuffer
* into a newly-allocated direct ByteBuffer. The returned buffer
* will have its byte order set to the host platform's native byte
* order. The position of the newly-allocated buffer will be zero,
* and the position of the passed buffer is unchanged.
*/
public static ByteBuffer copyShortBufferAsByteBuffer(final ShortBuffer orig) {
final int op0 = orig.position();
final ByteBuffer dest = newDirectByteBuffer(orig.remaining() * SIZEOF_SHORT);
dest.asShortBuffer().put(orig);
dest.rewind();
orig.position(op0);
return dest;
}
//----------------------------------------------------------------------
// Conversion routines
//
/**
* @param source the source array
* @param soffset the offset
* @param dest the target array, if null, a new array is being created with size len.
* @param doffset the offset in the dest array
* @param len the payload of elements to be copied, if len < 0 then len = source.length - soffset
* @return the passed or newly created target array
*/
public static float[] getFloatArray(final double[] source, final int soffset, float[] dest, int doffset, int len) {
if(0>len) {
len = source.length - soffset;
}
if(len > source.length - soffset) {
throw new IllegalArgumentException("payload ("+len+") greater than remaining source bytes [len "+source.length+", offset "+soffset+"]");
}
if(null==dest) {
dest = new float[len];
doffset = 0;
}
if(len > dest.length - doffset) {
throw new IllegalArgumentException("payload ("+len+") greater than remaining dest bytes [len "+dest.length+", offset "+doffset+"]");
}
for(int i=0; isource.remaining()
* @return the passed or newly created target buffer
*/
public static FloatBuffer getFloatBuffer(final DoubleBuffer source, FloatBuffer dest) {
if(null == dest) {
dest = newDirectFloatBuffer(source.remaining());
}
if( dest.remaining() < source.remaining() ) {
throw new IllegalArgumentException("payload ("+source.remaining()+") is greater than remaining dest bytes: "+dest.remaining());
}
while (source.hasRemaining()) {
dest.put((float) source.get());
}
return dest;
}
/**
* @param source the source array
* @param soffset the offset
* @param dest the target array, if null, a new array is being created with size len.
* @param doffset the offset in the dest array
* @param len the payload of elements to be copied, if len < 0 then len = source.length - soffset
* @return the passed or newly created target array
*/
public static double[] getDoubleArray(final float[] source, final int soffset, double[] dest, int doffset, int len) {
if(0>len) {
len = source.length - soffset;
}
if(len > source.length - soffset) {
throw new IllegalArgumentException("payload ("+len+") greater than remaining source bytes [len "+source.length+", offset "+soffset+"]");
}
if(null==dest) {
dest = new double[len];
doffset = 0;
}
if(len > dest.length - doffset) {
throw new IllegalArgumentException("payload ("+len+") greater than remaining dest bytes [len "+dest.length+", offset "+doffset+"]");
}
for(int i=0; isource.remaining()
* @return the passed or newly created target buffer
*/
public static DoubleBuffer getDoubleBuffer(final FloatBuffer source, DoubleBuffer dest) {
if(null == dest) {
dest = newDirectDoubleBuffer(source.remaining());
}
if( dest.remaining() < source.remaining() ) {
throw new IllegalArgumentException("payload ("+source.remaining()+") is greater than remaining dest bytes: "+dest.remaining());
}
while (source.hasRemaining()) {
dest.put(source.get());
}
return dest;
}
//----------------------------------------------------------------------
// Convenient put methods with generic target Buffer w/o value range conversion, i.e. normalization
//
@SuppressWarnings("unchecked")
public static B put(final B dest, final Buffer src) {
if ((dest instanceof ByteBuffer) && (src instanceof ByteBuffer)) {
return (B) ((ByteBuffer) dest).put((ByteBuffer) src);
} else if ((dest instanceof ShortBuffer) && (src instanceof ShortBuffer)) {
return (B) ((ShortBuffer) dest).put((ShortBuffer) src);
} else if ((dest instanceof IntBuffer) && (src instanceof IntBuffer)) {
return (B) ((IntBuffer) dest).put((IntBuffer) src);
} else if ((dest instanceof FloatBuffer) && (src instanceof FloatBuffer)) {
return (B) ((FloatBuffer) dest).put((FloatBuffer) src);
} else if ((dest instanceof LongBuffer) && (src instanceof LongBuffer)) {
return (B) ((LongBuffer) dest).put((LongBuffer) src);
} else if ((dest instanceof DoubleBuffer) && (src instanceof DoubleBuffer)) {
return (B) ((DoubleBuffer) dest).put((DoubleBuffer) src);
} else if ((dest instanceof CharBuffer) && (src instanceof CharBuffer)) {
return (B) ((CharBuffer) dest).put((CharBuffer) src);
}
throw new IllegalArgumentException("Incompatible Buffer classes: dest = " + dest.getClass().getName() + ", src = " + src.getClass().getName());
}
@SuppressWarnings("unchecked")
public static B putb(final B dest, final byte v) {
if (dest instanceof ByteBuffer) {
return (B) ((ByteBuffer) dest).put(v);
} else if (dest instanceof ShortBuffer) {
return (B) ((ShortBuffer) dest).put(v);
} else if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put(v);
} else if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put(v);
} else if (dest instanceof LongBuffer) {
return (B) ((LongBuffer) dest).put(v);
} else if (dest instanceof DoubleBuffer) {
return (B) ((DoubleBuffer) dest).put(v);
} else if (dest instanceof CharBuffer) {
return (B) ((CharBuffer) dest).put((char) v);
} else {
throw new IllegalArgumentException("Byte doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put3b(final B dest, final byte v1, final byte v2, final byte v3) {
if (dest instanceof ByteBuffer) {
final ByteBuffer b = (ByteBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof ShortBuffer) {
final ShortBuffer b = (ShortBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof IntBuffer) {
final IntBuffer b = (IntBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof LongBuffer) {
final LongBuffer b = (LongBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof CharBuffer) {
final CharBuffer b = (CharBuffer) dest;
b.put((char)v1);
b.put((char)v2);
b.put((char)v3);
return (B)b;
} else {
throw new IllegalArgumentException("Byte doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put4b(final B dest, final byte v1, final byte v2, final byte v3, final byte v4) {
if (dest instanceof ByteBuffer) {
final ByteBuffer b = (ByteBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof ShortBuffer) {
final ShortBuffer b = (ShortBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof IntBuffer) {
final IntBuffer b = (IntBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof LongBuffer) {
final LongBuffer b = (LongBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof CharBuffer) {
final CharBuffer b = (CharBuffer) dest;
b.put((char)v1);
b.put((char)v2);
b.put((char)v3);
b.put((char)v4);
return (B)b;
} else {
throw new IllegalArgumentException("Byte doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B putb(final B dest, final byte[] src, final int offset, final int length) {
if (dest instanceof ByteBuffer) {
return (B) ((ByteBuffer) dest).put(src, offset, length);
} else if (dest instanceof ShortBuffer) {
final ShortBuffer b = (ShortBuffer) dest;
for(int i=0; i B puts(final B dest, final short v) {
if (dest instanceof ShortBuffer) {
return (B) ((ShortBuffer) dest).put(v);
} else if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put(v);
} else if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put(v);
} else if (dest instanceof LongBuffer) {
return (B) ((LongBuffer) dest).put(v);
} else if (dest instanceof DoubleBuffer) {
return (B) ((DoubleBuffer) dest).put(v);
} else {
throw new IllegalArgumentException("Short doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put3s(final B dest, final short v1, final short v2, final short v3) {
if (dest instanceof ShortBuffer) {
final ShortBuffer b = (ShortBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof IntBuffer) {
final IntBuffer b = (IntBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof LongBuffer) {
final LongBuffer b = (LongBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else {
throw new IllegalArgumentException("Short doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put4s(final B dest, final short v1, final short v2, final short v3, final short v4) {
if (dest instanceof ShortBuffer) {
final ShortBuffer b = (ShortBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof IntBuffer) {
final IntBuffer b = (IntBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof LongBuffer) {
final LongBuffer b = (LongBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else {
throw new IllegalArgumentException("Short doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B puts(final B dest, final short[] src, final int offset, final int length) {
if (dest instanceof ShortBuffer) {
return (B) ((ShortBuffer) dest).put(src, offset, length);
} else if (dest instanceof IntBuffer) {
final IntBuffer b = (IntBuffer) dest;
for(int i=0; i B puti(final B dest, final int v) {
if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put(v);
} else if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put(v);
} else if (dest instanceof LongBuffer) {
return (B) ((LongBuffer) dest).put(v);
} else if (dest instanceof DoubleBuffer) {
return (B) ((DoubleBuffer) dest).put(v);
} else {
throw new IllegalArgumentException("Integer doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put3i(final B dest, final int v1, final int v2, final int v3) {
if (dest instanceof IntBuffer) {
final IntBuffer b = (IntBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof LongBuffer) {
final LongBuffer b = (LongBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else {
throw new IllegalArgumentException("Integer doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put4i(final B dest, final int v1, final int v2, final int v3, final int v4) {
if (dest instanceof IntBuffer) {
final IntBuffer b = (IntBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof LongBuffer) {
final LongBuffer b = (LongBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else {
throw new IllegalArgumentException("Integer doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B puti(final B dest, final int[] src, final int offset, final int length) {
if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put(src, offset, length);
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
for(int i=0; i B putf(final B dest, final float v) {
if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put(v);
} else if (dest instanceof DoubleBuffer) {
return (B) ((DoubleBuffer) dest).put(v);
/* TODO FixedPoint required
} else if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put(FixedPoint.toFixed(v));
*/
} else {
throw new IllegalArgumentException("Float doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put3f(final B dest, final float v1, final float v2, final float v3) {
if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else {
throw new IllegalArgumentException("Float doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put4f(final B dest, final float v1, final float v2, final float v3, final float v4) {
if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else {
throw new IllegalArgumentException("Float doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B putf(final B dest, final float[] src, final int offset, final int length) {
if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put(src, offset, length);
} else if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
for(int i=0; i B putd(final B dest, final double v) {
if (dest instanceof DoubleBuffer) {
return (B) ((DoubleBuffer) dest).put(v);
} else if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put((float) v);
} else {
throw new IllegalArgumentException("Double doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put3d(final B dest, final double v1, final double v2, final double v3) {
if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
return (B)b;
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put((float) v1);
b.put((float) v2);
b.put((float) v3);
return (B)b;
} else {
throw new IllegalArgumentException("Double doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B put4d(final B dest, final double v1, final double v2, final double v3, final double v4) {
if (dest instanceof DoubleBuffer) {
final DoubleBuffer b = (DoubleBuffer) dest;
b.put(v1);
b.put(v2);
b.put(v3);
b.put(v4);
return (B)b;
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
b.put((float) v1);
b.put((float) v2);
b.put((float) v3);
b.put((float) v4);
return (B)b;
} else {
throw new IllegalArgumentException("Double doesn't match Buffer Class: " + dest);
}
}
@SuppressWarnings("unchecked")
public static B putd(final B dest, final double[] src, final int offset, final int length) {
if (dest instanceof DoubleBuffer) {
return (B) ((DoubleBuffer) dest).put(src, offset, length);
} else if (dest instanceof FloatBuffer) {
final FloatBuffer b = (FloatBuffer) dest;
for(int i=0; i B putNb(final B dest, final boolean dSigned, final byte v, final boolean sSigned) {
if (dest instanceof ByteBuffer) {
return (B) ((ByteBuffer) dest).put( v );
} else if (dest instanceof ShortBuffer) {
return (B) ((ShortBuffer) dest).put( ValueConv.byte_to_short(v, sSigned, dSigned) );
} else if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put( ValueConv.byte_to_int(v, sSigned, dSigned) );
} else if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put( ValueConv.byte_to_float(v, sSigned) );
} else {
throw new IllegalArgumentException("Byte doesn't match Buffer Class: " + dest);
}
}
/**
* Store short source value in given buffer after normalizing it to the destination value range
* considering signed and unsigned source and destination representation.
*
* @param dest One of {@link ByteBuffer}, {@link ShortBuffer}, {@link IntBuffer}, {@link FloatBuffer}
* @param dSigned true if destination buffer holds signed values, false if destination buffer holds unsigned values
* @param v source short value to be put in dest buffer
* @param sSigned true if source represents a signed value, false if source represents an unsigned value
*/
@SuppressWarnings("unchecked")
public static B putNs(final B dest, final boolean dSigned, final short v, final boolean sSigned) {
if (dest instanceof ByteBuffer) {
return (B) ((ByteBuffer) dest).put( ValueConv.short_to_byte(v, sSigned, dSigned) );
} else if (dest instanceof ShortBuffer) {
return (B) ((ShortBuffer) dest).put( v );
} else if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put( ValueConv.short_to_int(v, sSigned, dSigned) );
} else if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put( ValueConv.short_to_float(v, sSigned) );
} else {
throw new IllegalArgumentException("Byte doesn't match Buffer Class: " + dest);
}
}
/**
* Store short source value in given buffer after normalizing it to the destination value range
* considering signed and unsigned source and destination representation.
*
* @param dest One of {@link ByteBuffer}, {@link ShortBuffer}, {@link IntBuffer}, {@link FloatBuffer}
* @param dSigned true if destination buffer holds signed values, false if destination buffer holds unsigned values
* @param v source short value to be put in dest buffer
* @param sSigned true if source represents a signed value, false if source represents an unsigned value
*/
@SuppressWarnings("unchecked")
public static B putNi(final B dest, final boolean dSigned, final int v, final boolean sSigned) {
if (dest instanceof ByteBuffer) {
return (B) ((ByteBuffer) dest).put( ValueConv.int_to_byte(v, sSigned, dSigned) );
} else if (dest instanceof ShortBuffer) {
return (B) ((ShortBuffer) dest).put( ValueConv.int_to_short(v, sSigned, dSigned) );
} else if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put( v );
} else if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put( ValueConv.int_to_float(v, sSigned) );
} else {
throw new IllegalArgumentException("Byte doesn't match Buffer Class: " + dest);
}
}
/**
* Store float source value in given buffer after normalizing it to the destination value range
* considering signed and unsigned destination representation.
*
* @param dest One of {@link ByteBuffer}, {@link ShortBuffer}, {@link IntBuffer}, {@link FloatBuffer}
* @param dSigned true if destination buffer holds signed values, false if destination buffer holds unsigned values
* @param v source float value to be put in dest buffer
*/
@SuppressWarnings("unchecked")
public static B putNf(final B dest, final boolean dSigned, final float v) {
if (dest instanceof ByteBuffer) {
return (B) ((ByteBuffer) dest).put( ValueConv.float_to_byte(v, dSigned) );
} else if (dest instanceof ShortBuffer) {
return (B) ((ShortBuffer) dest).put( ValueConv.float_to_short(v, dSigned) );
} else if (dest instanceof IntBuffer) {
return (B) ((IntBuffer) dest).put( ValueConv.float_to_int(v, dSigned) );
} else if (dest instanceof FloatBuffer) {
return (B) ((FloatBuffer) dest).put( v );
} else {
throw new IllegalArgumentException("Byte doesn't match Buffer Class: " + dest);
}
}
//----------------------------------------------------------------------
// Range check methods
//
public static void rangeCheck(final byte[] array, final int offset, final int minElementsRemaining) {
if (array == null) {
return;
}
if (array.length < offset + minElementsRemaining) {
throw new ArrayIndexOutOfBoundsException("Required " + minElementsRemaining + " elements in array, only had " + (array.length - offset));
}
}
public static void rangeCheck(final char[] array, final int offset, final int minElementsRemaining) {
if (array == null) {
return;
}
if (array.length < offset + minElementsRemaining) {
throw new ArrayIndexOutOfBoundsException("Required " + minElementsRemaining + " elements in array, only had " + (array.length - offset));
}
}
public static void rangeCheck(final short[] array, final int offset, final int minElementsRemaining) {
if (array == null) {
return;
}
if (array.length < offset + minElementsRemaining) {
throw new ArrayIndexOutOfBoundsException("Required " + minElementsRemaining + " elements in array, only had " + (array.length - offset));
}
}
public static void rangeCheck(final int[] array, final int offset, final int minElementsRemaining) {
if (array == null) {
return;
}
if (array.length < offset + minElementsRemaining) {
throw new ArrayIndexOutOfBoundsException("Required " + minElementsRemaining + " elements in array, only had " + (array.length - offset));
}
}
public static void rangeCheck(final long[] array, final int offset, final int minElementsRemaining) {
if (array == null) {
return;
}
if (array.length < offset + minElementsRemaining) {
throw new ArrayIndexOutOfBoundsException("Required " + minElementsRemaining + " elements in array, only had " + (array.length - offset));
}
}
public static void rangeCheck(final float[] array, final int offset, final int minElementsRemaining) {
if (array == null) {
return;
}
if (array.length < offset + minElementsRemaining) {
throw new ArrayIndexOutOfBoundsException("Required " + minElementsRemaining + " elements in array, only had " + (array.length - offset));
}
}
public static void rangeCheck(final double[] array, final int offset, final int minElementsRemaining) {
if (array == null) {
return;
}
if (array.length < offset + minElementsRemaining) {
throw new ArrayIndexOutOfBoundsException("Required " + minElementsRemaining + " elements in array, only had " + (array.length - offset));
}
}
public static void rangeCheck(final Buffer buffer, final int minElementsRemaining) {
if (buffer == null) {
return;
}
if (buffer.remaining() < minElementsRemaining) {
throw new IndexOutOfBoundsException("Required " + minElementsRemaining + " remaining elements in buffer, only had " + buffer.remaining());
}
}
/**
* @param buffer buffer to test for minimum
* @param minBytesRemaining minimum bytes remaining
* @throws IllegalArgumentException if buffer is of invalid type.
* @throws IndexOutOfBoundsException if {@link #remainingBytes(Object)} is < minBytesRemaining.
*/
public static void rangeCheckBytes(final Object buffer, final int minBytesRemaining) throws IllegalArgumentException, IndexOutOfBoundsException {
if (buffer == null) {
return;
}
final int bytesRemaining = remainingBytes(buffer);
if (bytesRemaining < minBytesRemaining) {
throw new IndexOutOfBoundsException("Required " + minBytesRemaining + " remaining bytes in buffer, only had " + bytesRemaining);
}
}
/**
* Appends Buffer details inclusive data to a StringBuilder instance.
* @param sb optional pass through StringBuilder
* @param f optional format string of one element, i.e. "%10.5f" for {@link FloatBuffer}, see {@link java.util.Formatter},
* or null for unformatted output.
* Note: Caller is responsible to match the format string w/ the data type as expected in the given buffer.
* @param buffer Any valid Buffer instance
* @return the modified StringBuilder containing the Buffer details
*/
public static StringBuilder toString(StringBuilder sb, final String f, final Buffer buffer) {
if(null == sb) {
sb = new StringBuilder();
}
sb.append(buffer.getClass().getSimpleName());
sb.append("[pos ").append(buffer.position()).append(", lim ").append(buffer.limit()).append(", cap ").append(buffer.capacity());
sb.append(", remaining ").append(buffer.remaining());
sb.append("; array ").append(buffer.hasArray()).append(", direct ").append(buffer.isDirect());
sb.append(", r/w ").append(!buffer.isReadOnly()).append(": ");
if (buffer instanceof ByteBuffer) {
final ByteBuffer b = (ByteBuffer)buffer;
for(int i=0; i() {
@Override
public Boolean run() {
try {
if( PlatformPropsImpl.JAVA_9 ) {
return UnsafeUtil.hasInvokeCleaner();
} else {
_mbbCleaner[0] = ReflectionUtil.getMethod("sun.nio.ch.DirectBuffer", "cleaner", null, Buffers.class.getClassLoader());
_mbbCleaner[0].setAccessible(true);
final Class cleanerType = _mbbCleaner[0].getReturnType();
// Java >= 9: jdk.internal.ref.Cleaner (NOT accessible!)
// "Unable to make public void jdk.internal.ref.Cleaner.clean() accessible:
// module java.base does not "exports jdk.internal.ref" to unnamed module"
// Java <= 8: sun.misc.Cleaner OK
_cClean[0] = cleanerType.getMethod("clean");
_cClean[0].setAccessible(true);
return Boolean.TRUE;
}
} catch(final Throwable t) {
if( DEBUG ) {
ExceptionUtils.dumpThrowable("Buffers", t);
}
return Boolean.FALSE;
} } } ).booleanValue() ) {
mbbCleaner = _mbbCleaner[0];
cClean = _cClean[0];
hasCleaner = PlatformPropsImpl.JAVA_9 || ( null != mbbCleaner && null != cClean );
} else {
mbbCleaner = null;
cClean = null;
hasCleaner = false;
}
cleanerError = !hasCleaner;
if( DEBUG ) {
System.err.print("Buffers.Cleaner.init: hasCleaner: "+hasCleaner+", cleanerError "+cleanerError);
if( null != mbbCleaner ) {
System.err.print(", using Cleaner class: "+mbbCleaner.getReturnType().getName());
}
System.err.println();
}
}
/**
* If {@code b} is an direct NIO buffer, i.e {@link sun.nio.ch.DirectBuffer},
* calls it's {@link sun.misc.Cleaner} instance {@code clean()} method once.
* @return {@code true} if successful, otherwise {@code false}.
*/
public static boolean clean(final ByteBuffer bb) {
if( cleanerError || !bb.isDirect() ) {
return false;
}
try {
if( PlatformPropsImpl.JAVA_9 ) {
UnsafeUtil.invokeCleaner(bb);
} else {
cClean.invoke(mbbCleaner.invoke(bb));
}
return true;
} catch(final Throwable t) {
cleanerError = true;
if( DEBUG ) {
ExceptionUtils.dumpThrowable("Buffers", t);
}
return false;
}
}
}
/**
* Copy `len` native bytes @ `source_address` into a newly created direct {@link ByteBuffer}.
* @param source_address memory address of bytes to copy from
* @param len number of bytes to copy
* @return newly created direct {@link ByteBuffer} holding the copied bytes
*/
public static ByteBuffer copyNativeToDirectByteBuffer(final long source_address, final long len) {
if( Integer.MAX_VALUE < len ) {
throw new IllegalArgumentException("length "+len+" > MAX_INT");
}
final int lenI = (int)len;
final ByteBuffer bb = Buffers.newDirectByteBuffer(lenI);
if( null == bb ) {
throw new RuntimeException("New direct ByteBuffer is NULL");
}
if( 0 < lenI ) {
final long byteBufferPtr = getDirectBufferAddressImpl(bb);
memcpyImpl(byteBufferPtr, source_address, lenI);
}
return bb;
}
/* pp */ static ByteBuffer getDirectByteBuffer(final long aptr, final int byteCount) {
final ByteBuffer r = getDirectByteBufferImpl(aptr, byteCount);
return null != r ? nativeOrder( r ) : null;
}
/* pp */ static void storeDirectAddress(final long addr, final ByteBuffer dest, final int destBytePos, final int nativeSizeInBytes) {
switch(nativeSizeInBytes) {
case 4:
dest.putInt(destBytePos, (int) ( addr & 0x00000000FFFFFFFFL ) );
break;
case 8:
dest.putLong(destBytePos, addr);
break;
default:
throw new InternalError("invalid nativeSizeInBytes "+nativeSizeInBytes);
}
}
/**
* Returns strnlen(cstrptr, maxlen) according to POSIX.1-2008.
*
* The `strnlen()` function returns the number of bytes in the string pointed to by `cstrptr`, excluding the terminating null byte ('\0'), but at most `maxlen`.
* In doing this, `strnlen()` looks only at the first `maxlen` characters in the string pointed to by `cstrptr` and never beyond `cstrptr[maxlen-1]`.
*
*/
public static int strnlen(final long cstrptr, final int maxlen) {
return strnlenImpl(cstrptr, maxlen);
}
/**
* Returns memcpy(dest, src, len) according to POSIX.1-2001, POSIX.1-2008.
*
* The `memcpy()` function copies `len` bytes from memory area `src` to memory area `dest`. The memory areas must not overlap.
* The `memcpy()` function returns a pointer to `dest`.
*
public static long memcpy(final long dest, final long src, final long len) {
return memcpyImpl(dest, src, len);
}
*/
/* pp */ static native long getDirectBufferAddressImpl(Object directBuffer);
private static native ByteBuffer getDirectByteBufferImpl(long aptr, int byteCount);
private static native int strnlenImpl(long cstrptr, int maxlen);
private static native long memcpyImpl(long dest, long src, long len);
}