| /* ByteBufferImpl.java -- |
| Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package java.nio; |
| |
| /** |
| * @author Michael Koch (konqueror@gmx.de) |
| */ |
| final class ByteBufferHelper |
| { |
| public static char getChar (ByteBuffer buffer, ByteOrder order) |
| { |
| return (char) getShort (buffer, order); |
| } |
| |
| public static void putChar (ByteBuffer buffer, char value, ByteOrder order) |
| { |
| putShort (buffer, (short) value, order); |
| } |
| |
| public static char getChar (ByteBuffer buffer, int index, ByteOrder order) |
| { |
| return (char) getShort (buffer, index, order); |
| } |
| |
| public static void putChar (ByteBuffer buffer, int index, |
| char value, ByteOrder order) |
| { |
| putShort (buffer, index, (short) value, order); |
| } |
| |
| public static short getShort (ByteBuffer buffer, ByteOrder order) |
| { |
| buffer.checkForUnderflow(2); |
| |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| return (short) ((buffer.get() & 0xff) |
| + (buffer.get() << 8)); |
| } |
| |
| return (short) ((buffer.get() << 8) |
| + (buffer.get() & 0xff)); |
| } |
| |
| public static void putShort (ByteBuffer buffer, short value, ByteOrder order) |
| { |
| buffer.checkForOverflow(2); |
| |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| buffer.put ((byte) value); |
| buffer.put ((byte) (value >> 8)); |
| } |
| else |
| { |
| buffer.put ((byte) (value >> 8)); |
| buffer.put ((byte) value); |
| } |
| } |
| |
| public static short getShort (ByteBuffer buffer, |
| int index, ByteOrder order) |
| { |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| return (short) ((buffer.get (index) & 0xff) |
| + (buffer.get (++index) << 8)); |
| } |
| |
| return (short) ((buffer.get (index) << 8) |
| + (buffer.get (++index) & 0xff)); |
| } |
| |
| public static void putShort (ByteBuffer buffer, int index, |
| short value, ByteOrder order) |
| { |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| buffer.put (index, (byte) value); |
| buffer.put (++index, (byte) (value >> 8)); |
| } |
| else |
| { |
| buffer.put (index, (byte) (value >> 8)); |
| buffer.put (++index, (byte) value); |
| } |
| } |
| |
| public static int getInt (ByteBuffer buffer, ByteOrder order) |
| { |
| buffer.checkForUnderflow(4); |
| |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| return ((buffer.get() & 0xff) |
| + ((buffer.get() & 0xff) << 8) |
| + ((buffer.get() & 0xff) << 16) |
| + (buffer.get() << 24)); |
| } |
| |
| return (int) ((buffer.get() << 24) |
| + ((buffer.get() & 0xff) << 16) |
| + ((buffer.get() & 0xff) << 8) |
| + (buffer.get() & 0xff)); |
| } |
| |
| public static void putInt (ByteBuffer buffer, int value, ByteOrder order) |
| { |
| buffer.checkForOverflow(4); |
| |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| buffer.put ((byte) value); |
| buffer.put ((byte) (value >> 8)); |
| buffer.put ((byte) (value >> 16)); |
| buffer.put ((byte) (value >> 24)); |
| } |
| else |
| { |
| buffer.put ((byte) (value >> 24)); |
| buffer.put ((byte) (value >> 16)); |
| buffer.put ((byte) (value >> 8)); |
| buffer.put ((byte) value); |
| } |
| } |
| |
| public static int getInt (ByteBuffer buffer, int index, ByteOrder order) |
| { |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| return ((buffer.get (index) & 0xff) |
| + ((buffer.get (++index) & 0xff) << 8) |
| + ((buffer.get (++index) & 0xff) << 16) |
| + (buffer.get (++index) << 24)); |
| } |
| |
| return ((buffer.get (index) << 24) |
| + ((buffer.get (++index) & 0xff) << 16) |
| + ((buffer.get (++index) & 0xff) << 8) |
| + (buffer.get (++index) & 0xff)); |
| } |
| |
| public static void putInt (ByteBuffer buffer, int index, |
| int value, ByteOrder order) |
| { |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| buffer.put (index, (byte) value); |
| buffer.put (++index, (byte) (value >> 8)); |
| buffer.put (++index, (byte) (value >> 16)); |
| buffer.put (++index, (byte) (value >> 24)); |
| } |
| else |
| { |
| buffer.put (index, (byte) (value >> 24)); |
| buffer.put (++index, (byte) (value >> 16)); |
| buffer.put (++index, (byte) (value >> 8)); |
| buffer.put (++index, (byte) value); |
| } |
| } |
| |
| public static long getLong (ByteBuffer buffer, ByteOrder order) |
| { |
| buffer.checkForUnderflow(8); |
| |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| return ((buffer.get() & 0xff) |
| + (((buffer.get() & 0xff)) << 8) |
| + (((buffer.get() & 0xff)) << 16) |
| + (((buffer.get() & 0xffL)) << 24) |
| + (((buffer.get() & 0xffL)) << 32) |
| + (((buffer.get() & 0xffL)) << 40) |
| + (((buffer.get() & 0xffL)) << 48) |
| + (((long) buffer.get()) << 56)); |
| } |
| |
| return ((((long) buffer.get()) << 56) |
| + ((buffer.get() & 0xffL) << 48) |
| + ((buffer.get() & 0xffL) << 40) |
| + ((buffer.get() & 0xffL) << 32) |
| + ((buffer.get() & 0xffL) << 24) |
| + ((buffer.get() & 0xff) << 16) |
| + ((buffer.get() & 0xff) << 8) |
| + (buffer.get() & 0xff)); |
| } |
| |
| public static void putLong (ByteBuffer buffer, long value, ByteOrder order) |
| { |
| buffer.checkForOverflow(8); |
| |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| buffer.put ((byte) value); |
| buffer.put ((byte) (value >> 8)); |
| buffer.put ((byte) (value >> 16)); |
| buffer.put ((byte) (value >> 24)); |
| buffer.put ((byte) (value >> 32)); |
| buffer.put ((byte) (value >> 40)); |
| buffer.put ((byte) (value >> 48)); |
| buffer.put ((byte) (value >> 56)); |
| } |
| else |
| { |
| buffer.put ((byte) (value >> 56)); |
| buffer.put ((byte) (value >> 48)); |
| buffer.put ((byte) (value >> 40)); |
| buffer.put ((byte) (value >> 32)); |
| buffer.put ((byte) (value >> 24)); |
| buffer.put ((byte) (value >> 16)); |
| buffer.put ((byte) (value >> 8)); |
| buffer.put ((byte) value); |
| } |
| } |
| |
| public static long getLong (ByteBuffer buffer, int index, ByteOrder order) |
| { |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| return ((buffer.get (index) & 0xff) |
| + ((buffer.get (++index) & 0xff) << 8) |
| + ((buffer.get (++index) & 0xff) << 16) |
| + ((buffer.get (++index) & 0xffL) << 24) |
| + ((buffer.get (++index) & 0xffL) << 32) |
| + ((buffer.get (++index) & 0xffL) << 40) |
| + ((buffer.get (++index) & 0xffL) << 48) |
| + (((long) buffer.get (++index)) << 56)); |
| } |
| |
| return ((((long) buffer.get (index)) << 56) |
| + ((buffer.get (++index) & 0xffL) << 48) |
| + ((buffer.get (++index) & 0xffL) << 40) |
| + ((buffer.get (++index) & 0xffL) << 32) |
| + ((buffer.get (++index) & 0xffL) << 24) |
| + ((buffer.get (++index) & 0xff) << 16) |
| + ((buffer.get (++index) & 0xff) << 8) |
| + (buffer.get (++index) & 0xff)); |
| } |
| |
| public static void putLong (ByteBuffer buffer, int index, |
| long value, ByteOrder order) |
| { |
| if (order == ByteOrder.LITTLE_ENDIAN) |
| { |
| buffer.put (index, (byte) value); |
| buffer.put (++index, (byte) (value >> 8)); |
| buffer.put (++index, (byte) (value >> 16)); |
| buffer.put (++index, (byte) (value >> 24)); |
| buffer.put (++index, (byte) (value >> 32)); |
| buffer.put (++index, (byte) (value >> 40)); |
| buffer.put (++index, (byte) (value >> 48)); |
| buffer.put (++index, (byte) (value >> 56)); |
| } |
| else |
| { |
| buffer.put (index, (byte) (value >> 56)); |
| buffer.put (++index, (byte) (value >> 48)); |
| buffer.put (++index, (byte) (value >> 40)); |
| buffer.put (++index, (byte) (value >> 32)); |
| buffer.put (++index, (byte) (value >> 24)); |
| buffer.put (++index, (byte) (value >> 16)); |
| buffer.put (++index, (byte) (value >> 8)); |
| buffer.put (++index, (byte) value); |
| } |
| } |
| |
| public static float getFloat (ByteBuffer buffer, ByteOrder order) |
| { |
| return Float.intBitsToFloat (getInt (buffer, order)); |
| } |
| |
| public static void putFloat (ByteBuffer buffer, float value, ByteOrder order) |
| { |
| putInt (buffer, Float.floatToRawIntBits (value), order); |
| } |
| |
| public static float getFloat (ByteBuffer buffer, int index, ByteOrder order) |
| { |
| return Float.intBitsToFloat (getInt (buffer, index, order)); |
| } |
| |
| public static void putFloat (ByteBuffer buffer, int index, |
| float value, ByteOrder order) |
| { |
| putInt (buffer, index, Float.floatToRawIntBits (value), order); |
| } |
| |
| public static double getDouble (ByteBuffer buffer, ByteOrder order) |
| { |
| return Double.longBitsToDouble (getLong (buffer, order)); |
| } |
| |
| public static void putDouble (ByteBuffer buffer, double value, ByteOrder order) |
| { |
| putLong (buffer, Double.doubleToRawLongBits (value), order); |
| } |
| |
| public static double getDouble (ByteBuffer buffer, int index, ByteOrder order) |
| { |
| return Double.longBitsToDouble (getLong (buffer, index, order)); |
| } |
| |
| public static void putDouble (ByteBuffer buffer, int index, |
| double value, ByteOrder order) |
| { |
| putLong (buffer, index, Double.doubleToRawLongBits (value), order); |
| } |
| } // ByteBufferHelper |
| |