1 files changed, 317 insertions, 0 deletions
diff --git a/src/java/com/jogamp/gluegen/runtime/BufferFactory.java b/src/java/com/jogamp/gluegen/runtime/BufferFactory.java
new file mode 100755
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--- /dev/null
+++ b/src/java/com/jogamp/gluegen/runtime/BufferFactory.java
@@ -0,0 +1,317 @@
+/*
+ * 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.jogamp.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;
+
+  private static final boolean isLittleEndian;
+
+  static {
+    ByteBuffer tst_b = BufferFactory.newDirectByteBuffer(BufferFactory.SIZEOF_INT); // 32bit in native order
+    IntBuffer tst_i = tst_b.asIntBuffer();
+    ShortBuffer tst_s = tst_b.asShortBuffer();
+    tst_i.put(0, 0x0A0B0C0D);
+    isLittleEndian = 0x0C0D == tst_s.get(0) ;
+  }
+
+  public static boolean isLittleEndian() {
+    return isLittleEndian;
+  }
+
+  /** Helper routine to create a direct ByteBuffer with native order */
+  public static ByteBuffer newDirectByteBuffer(int size) {
+    return nativeOrder(ByteBuffer.allocateDirect(size));
+  }
+
+  /** 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 NOT direct. isDirect() should really be
+      public in Buffer and not replicated in all subclasses. */
+  public static boolean isDirect(Object 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();
+    } else if (buf instanceof PointerBuffer) {
+      return ((PointerBuffer) 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(Object buf) {
+    if(buf == null) {
+      return 0;
+    }
+    if(buf instanceof Buffer) {
+        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 PointerBuffer) {
+      PointerBuffer pb = (PointerBuffer)buf;
+      return pb.position() * pb.elementSize();
+    } 
+
+    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(Object 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();
+     } else if (buf instanceof PointerBuffer) { 
+       return ((PointerBuffer) 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(Object buf) {
+    if(buf == null) {
+      return 0;
+    }
+    if (buf instanceof Buffer) {
+        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 PointerBuffer) {
+        PointerBuffer pb = (PointerBuffer)buf;
+        return pb.elementSize()*(pb.arrayOffset() + pb.position());
+    }
+
+    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(Object buffer, int minBytesRemaining) {
+    if (buffer == null) {
+      return;
+    }
+
+    int bytesRemaining = 0;
+    if (buffer instanceof Buffer) {
+        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 if (buffer instanceof PointerBuffer) {
+      PointerBuffer pb = (PointerBuffer)buffer;
+      bytesRemaining = pb.remaining() * pb.elementSize();
+    }
+    if (bytesRemaining < minBytesRemaining) {
+      throw new IndexOutOfBoundsException("Required " + minBytesRemaining + " remaining bytes in buffer, only had " + bytesRemaining);
+    }
+  }
+}