/*+
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 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.+
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.+
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 *+
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 * This code is free software; you can redistribute it and/or modify it+
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 * under the terms of the GNU General Public License version 2 only, as+
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 * published by the Free Software Foundation.+
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 *+
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 * This code is distributed in the hope that it will be useful, but WITHOUT+
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or+
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License+
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 * version 2 for more details (a copy is included in the LICENSE file that+
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 * accompanied this code).+
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 *+
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 * You should have received a copy of the GNU General Public License version+
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 * 2 along with this work; if not, write to the Free Software Foundation,+
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.+
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 *+
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA+
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 * or visit www.oracle.com if you need additional information or have any+
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 * questions.+
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 *+
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 */+
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+
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#include "Buffer.hpp"+
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+
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#include <string.h>+
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+
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Buffer::Buffer(int bufSize) {+
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  buf = new char[bufSize];+
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  sz = bufSize;+
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  fill = 0;+
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  drain = 0;+
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}+
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+
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Buffer::~Buffer() {+
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  delete[] buf;+
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}+
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+
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char*+
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Buffer::fillPos() {+
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  return buf + fill;+
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}+
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+
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int+
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Buffer::remaining() {+
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  return sz - fill;+
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}+
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+
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int+
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Buffer::size() {+
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  return sz;+
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}+
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+
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bool+
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Buffer::incrFillPos(int amt) {+
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  if (fill + amt >= sz) {+
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    return false;+
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  }+
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  fill += amt;+
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  return true;+
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}+
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+
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int+
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Buffer::readByte() {+
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  if (drain < fill) {+
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    return buf[drain++] & 0xFF;+
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  } else {+
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    return -1;+
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  }+
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}+
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+
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int+
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Buffer::readBytes(char* data, int len) {+
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  int numRead = 0;+
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  while (numRead < len) {+
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    int c = readByte();+
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    if (c < 0) break;+
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    data[numRead++] = (char) c;+
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  }+
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  return numRead;+
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}+
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+
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char*+
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Buffer::drainPos() {+
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  return buf + drain;+
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}+
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+
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int+
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Buffer::drainRemaining() {+
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  return fill - drain;+
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}+
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+
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bool+
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Buffer::incrDrainPos(int amt) {+
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  if (drainRemaining() < amt) {+
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    return false;+
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  }+
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  drain += amt;+
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  return true;+
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}+
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+
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void+
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Buffer::compact() {+
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  // Copy down data+
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  memmove(buf, buf + drain, fill - drain);+
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  // Adjust positions+
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  fill -= drain;+
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  drain = 0;+
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}+
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