diff options
Diffstat (limited to 'src/java/com/sun/gluegen/runtime/BufferFactory.java.javase')
-rwxr-xr-x | src/java/com/sun/gluegen/runtime/BufferFactory.java.javase | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/src/java/com/sun/gluegen/runtime/BufferFactory.java.javase b/src/java/com/sun/gluegen/runtime/BufferFactory.java.javase new file mode 100755 index 0000000..3986bf6 --- /dev/null +++ b/src/java/com/sun/gluegen/runtime/BufferFactory.java.javase @@ -0,0 +1,299 @@ +/* + * Copyright (c) 2003 Sun Microsystems, Inc. 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.sun.gluegen.runtime; + +import java.nio.*; + +public class BufferFactory { + public static final int SIZEOF_BYTE = 1; + public static final int SIZEOF_SHORT = 2; + public static final int SIZEOF_CHAR = 2; + public static final int SIZEOF_INT = 4; + public static final int SIZEOF_FLOAT = 4; + public static final int SIZEOF_LONG = 8; + public static final int SIZEOF_DOUBLE = 8; + + public static ByteBuffer newDirectByteBuffer(int size) { + ByteBuffer buf = ByteBuffer.allocateDirect(size); + buf.order(ByteOrder.nativeOrder()); + return buf; + } + + /** Helper routine to set a ByteBuffer to the native byte order, if + that operation is supported by the underlying NIO + implementation. */ + public static ByteBuffer nativeOrder(ByteBuffer buf) { + return buf.order(ByteOrder.nativeOrder()); + } + + /** Helper routine to tell whether a buffer is direct or not. Null + pointers are considered direct. isDirect() should really be + public in Buffer and not replicated in all subclasses. */ + public static boolean isDirect(Buffer buf) { + if (buf == null) { + return true; + } + if (buf instanceof ByteBuffer) { + return ((ByteBuffer) buf).isDirect(); + } else if (buf instanceof FloatBuffer) { + return ((FloatBuffer) buf).isDirect(); + } else if (buf instanceof DoubleBuffer) { + return ((DoubleBuffer) buf).isDirect(); + } else if (buf instanceof CharBuffer) { + return ((CharBuffer) buf).isDirect(); + } else if (buf instanceof ShortBuffer) { + return ((ShortBuffer) buf).isDirect(); + } else if (buf instanceof IntBuffer) { + return ((IntBuffer) buf).isDirect(); + } else if (buf instanceof LongBuffer) { + return ((LongBuffer) buf).isDirect(); + } + throw new RuntimeException("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(Buffer buf) { + if(buf == null) { + return 0; + } + if(buf instanceof ByteBuffer) { + return (buf.position()); + } else if (buf instanceof FloatBuffer) { + return (buf.position() * SIZEOF_FLOAT); + } else if (buf instanceof IntBuffer) { + return (buf.position() * SIZEOF_INT); + } else if (buf instanceof ShortBuffer) { + return (buf.position() * SIZEOF_SHORT); + } else if (buf instanceof DoubleBuffer) { + return (buf.position() * SIZEOF_DOUBLE); + } else if (buf instanceof LongBuffer) { + return (buf.position() * SIZEOF_LONG); + } else if (buf instanceof CharBuffer) { + return (buf.position() * SIZEOF_CHAR); + } + + throw new RuntimeException("Disallowed array backing store type in buffer " + + buf.getClass().getName()); + } + + + /** Helper routine to return the array backing store reference from + a Buffer object. */ + + public static Object getArray(Buffer buf) { + if (buf == null) { + return null; + } + if(buf instanceof ByteBuffer) { + return ((ByteBuffer) buf).array(); + } else if (buf instanceof FloatBuffer) { + return ((FloatBuffer) buf).array(); + } else if (buf instanceof IntBuffer) { + return ((IntBuffer) buf).array(); + } else if (buf instanceof ShortBuffer) { + return ((ShortBuffer) buf).array(); + } else if (buf instanceof DoubleBuffer) { + return ((DoubleBuffer) buf).array(); + } else if (buf instanceof LongBuffer) { + return ((LongBuffer) buf).array(); + } else if (buf instanceof CharBuffer) { + return ((CharBuffer) buf).array(); + } + + throw new RuntimeException("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(Buffer buf) { + if(buf == null) { + return 0; + } + int pos = 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)); + } + + throw new RuntimeException("Unknown buffer type " + buf.getClass().getName()); + } + + public static void rangeCheck(byte[] array, int offset, 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(char[] array, int offset, 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(short[] array, int offset, 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(int[] array, int offset, 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(long[] array, int offset, 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(float[] array, int offset, 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(double[] array, int offset, 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(Buffer buffer, int minElementsRemaining) { + if (buffer == null) { + return; + } + + if (buffer.remaining() < minElementsRemaining) { + throw new IndexOutOfBoundsException("Required " + minElementsRemaining + " remaining elements in buffer, only had " + buffer.remaining()); + } + } + + public static void rangeCheckBytes(Buffer buffer, int minBytesRemaining) { + if (buffer == null) { + return; + } + + int elementsRemaining = buffer.remaining(); + int bytesRemaining = 0; + 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; + } + if (bytesRemaining < minBytesRemaining) { + throw new IndexOutOfBoundsException("Required " + minBytesRemaining + " remaining bytes in buffer, only had " + bytesRemaining); + } + } + + public static LongBuffer asPointerBuffer(ByteBuffer src) { + if (CPU.is32Bit()) { + // Must convert each pointer from 32-bit to 64-bit + IntBuffer buf = src.asIntBuffer(); + int len = buf.capacity(); + LongBuffer res = LongBuffer.wrap(new long[len]); + for (int i = 0; i < len; i++) { + res.put(i, buf.get(i)); + } + return res; + } else { + return src.asLongBuffer(); + } + } +} |