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// natDirectByteBufferImpl.cc

/* Copyright (C) 2003, 2004  Free Software Foundation

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the

Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for

details.  */

#include <config.h>

#include <gcj/cni.h>

#include <jvm.h>

#include <stdlib.h>

#include <gnu/gcj/RawData.h>

#include <java/nio/VMDirectByteBuffer.h>

using gnu::gcj::RawData;

RawData*

java::nio::VMDirectByteBuffer::allocate (jint capacity)

{

  return reinterpret_cast<gnu::gcj::RawData*> (::malloc (capacity));

}

void

java::nio::VMDirectByteBuffer::free (gnu::gcj::RawData* address)

{

  ::free (reinterpret_cast<void*> (address));

}

jbyte

java::nio::VMDirectByteBuffer::get (RawData* address, jint index)

{

  jbyte* pointer = reinterpret_cast<jbyte*> (address) + index;

  return *pointer;

}

void

java::nio::VMDirectByteBuffer::get (RawData* address, jint index,

                                    jbyteArray dst, jint offset, jint length)

{

  jbyte* src = reinterpret_cast<jbyte*> (address) + index;

  memcpy (elements (dst) + offset, src, length);

}

void

java::nio::VMDirectByteBuffer::put (gnu::gcj::RawData* address,

                                    jint index, jbyte value)

{

  jbyte* pointer = reinterpret_cast<jbyte*> (address) + index;

  *pointer = value;

}

RawData*

java::nio::VMDirectByteBuffer::adjustAddress (RawData* address, jint offset)

{

  jbyte* start = reinterpret_cast<jbyte*> (address) + offset;

  return reinterpret_cast<RawData*>(start);

}

void

java::nio::VMDirectByteBuffer::shiftDown (RawData* address, jint dst_offset,

                                          jint src_offset, jint count)

{

  jbyte* dst = reinterpret_cast<jbyte*> (address) + dst_offset;

  jbyte* src = reinterpret_cast<jbyte*> (address) + src_offset;

  ::memmove(dst, src, count);

}