package org.mathpiper.mpreduce.io.streams;

//
// This file is part of the Jlisp implementation of Standard Lisp
// Copyright \u00a9 (C) Codemist Ltd, 1998-2000.
//

/**************************************************************************
 * Copyright (C) 1998-2011, Codemist Ltd.                A C Norman       *
 *                            also contributions from Vijay Chauhan, 2002 *
 *                                                                        *
 * Redistribution and use in source and binary forms, with or without     *
 * modification, are permitted provided that the following conditions are *
 * met:                                                                   *
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 *     * Redistributions of source code must retain the relevant          *
 *       copyright notice, this list of conditions and the following      *
 *       disclaimer.                                                      *
 *     * Redistributions 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.                                           *
 *                                                                        *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS    *
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT      *
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS      *
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE         *
 * COPYRIGHT OWNERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,   *
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,   *
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 * DAMAGE.                                                                *
 *************************************************************************/


public class LispStringReader extends LispStream
{

    int pos;

    public LispStringReader(String data)
    {
        super("<read from string>");
        stringData = data;
        pos = 0;
        needsPrompt = false;
        escaped = false;
        this.allowOctal = allowOctal;
        nextChar = -2;
    }

    public int read()
    {
        if (pos >= stringData.length()) return -1;
        else return (int)stringData.charAt(pos++);
    }

    public void close()
    {
        stringData = null;
    }

}

// end of LispStringReader.java
