otpexternal.java

来自「OTP是开放电信平台的简称」· Java 代码 · 共 89 行

/* ``The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved via the world wide web at http://www.erlang.org/.
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * The Initial Developer of the Original Code is Ericsson Utvecklings AB.
 * Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
 * AB. All Rights Reserved.''
 * 
 *     $Id$
 */
package com.ericsson.otp.erlang;

/**
 * Provides a collection of constants used when encoding and decoding
 * Erlang terms.
 **/
public class OtpExternal {
  // no constructor
  private OtpExternal() {
  }
  
  /** The tag used for small integers */
  public static final int smallIntTag =     97;

  /** The tag used for integers */
  public static final int intTag =          98;

  /** The tag used for floating point numbers */
  public static final int floatTag =        99;

  /** The tag used for atoms */
  public static final int atomTag =        100;

  /** The tag used for old stype references */
  public static final int refTag =         101;

  /** The tag used for ports */
  public static final int portTag =        102;

  /** The tag used for PIDs */
  public static final int pidTag =         103;

  /** The tag used for small tuples */
  public static final int smallTupleTag =  104;

  /** The tag used for large tuples */
  public static final int largeTupleTag =  105;

  /** The tag used for empty lists */
  public static final int nilTag =         106;

  /** The tag used for strings and lists of small integers */
  public static final int stringTag =      107;

  /** The tag used for non-empty lists */
  public static final int listTag =        108;

  /** The tag used for binaries */
  public static final int binTag =         109;

  /** The tag used for small bignums */
  public static final int smallBigTag =    110;

  /** The tag used for large bignums */
  public static final int largeBigTag =    111;

  /** The tag used for new style references */
  public static final int newRefTag =      114;

  /** The version number used to mark serialized Erlang terms */
  public static final int versionTag =     131;

  /** The largest value that can be encoded as an integer */
  public static final int erlMax = (1 << 27) -1;

  /** The smallest value that can be encoded as an integer */
  public static final int erlMin = -(1 << 27);

  /** The longest allowed Erlang atom */
  public static final int maxAtomLength = 255;
}