/* Generated automatically by jlpp - do not edit. */

#line 1 "io/ByteArrayInputStream.jlc"
// -*- c++ -*-

/*
 * Jakelib2 - General purpose C++ library
 * Copyright (C) 2001 Florian Wolff  (florian@donuz.de)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: ByteArrayInputStream.jlc,v 1.4 2003/09/27 08:10:28 florian Exp $
 */


#include "jakelib2.h"
#include "jakelib2/io/ByteArrayInputStream.h"
#include "jakelib2/io/File.h"
#include "jakelib2/util/ByteArray.h"
#include "jakelib2/lang/Math.h"
#include <string.h>

using namespace jakelib::lang;
using namespace jakelib::io;
using namespace jakelib::util;

JAKELIB_IMPLEMENT_CLASS("jakelib.io.ByteArrayInputStream", ByteArrayInputStream, InputStream)


/*****************************************************************************\
 * ByteArrayInputStream                                                       |
 *****************************************************************************/
ByteArrayInputStream::ByteArrayInputStream(jbyte* bytes, int len,
        jboolean copyBytes)
{
  this->copyBytes = copyBytes;

  pos = 0;
  count = len;
  byteArray = null;

  if (copyBytes) {
    buf = (jbyte*) malloc(len * sizeof(jbyte));
    memcpy(buf, bytes, len * sizeof(jbyte));
  }
  else {
    buf = bytes;
  }
}
 
ByteArrayInputStream::ByteArrayInputStream(ByteArray* byteArray,
        jboolean copyBytes)
{
  this->copyBytes = copyBytes;

  pos = 0;
  count = byteArray->size();

  if (copyBytes) {
    buf = (jbyte*) malloc(count * sizeof(jbyte));
    byteArray->copyTo(buf);
    this->byteArray = null;
  }
  else {
    buf = byteArray->getBytes();
    this->byteArray = byteArray;
  }
}

ByteArrayInputStream::~ByteArrayInputStream()
{
  close();
}


/*****************************************************************************\
 * read                                                                       |
 *****************************************************************************/
int ByteArrayInputStream::read()
{
  jbyte b;

  if (pos < count) {
    b = buf[pos++];
    return b & 0xff;
  }
  else {
    return -1;
  }
}


/*****************************************************************************\
 * read                                                                       |
 *****************************************************************************/
int ByteArrayInputStream::read(jbyte* b, int offset, int len)
{
  int r;

  if (b == null)
    throw new NullPointerException(JAKELIB_AT2("jakelib.io.ByteArrayInputStream.read"));
  else if (len < 0 || offset < 0)
    throw new IndexOutOfBoundsException(JAKELIB_AT2("jakelib.io.ByteArrayInputStream.read"));
  else if (len == 0)
    return 0;
  
  r = Math::max(len, count - pos);

  memcpy(b, buf, r * sizeof(jbyte));

  pos += r;

  return r;
}


/*****************************************************************************\
 * close                                                                      |
 *****************************************************************************/
void ByteArrayInputStream::close()
{
  if (copyBytes) {
    free(buf);
  }

  buf = null;
  byteArray = null;
}


/*****************************************************************************\
 * reset                                                                      |
 *****************************************************************************/
void ByteArrayInputStream::reset()
{
  pos = 0;
}


/*****************************************************************************\
 * available                                                                  |
 *****************************************************************************/
int ByteArrayInputStream::available()
{
  return count - pos;
}


/*****************************************************************************\
 * skip                                                                       |
 *****************************************************************************/
int ByteArrayInputStream::skip(int n)
{
  // FIXME
  return 0;
}