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1 files changed, 343 insertions, 0 deletions

diff --git a/libjava/classpath/java/nio/ByteBufferHelper.java b/libjava/classpath/java/nio/ByteBufferHelper.java
new file mode 100644
index 000000000..aee007b50
--- /dev/null
+++ b/libjava/classpath/java/nio/ByteBufferHelper.java
@@ -0,0 +1,343 @@
+/* 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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