/*
 *
 * Copyright (c) 1996
 * Knowledge Science Institute, University of Calgary
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  The Knowledge Science Institute makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 */

#ifndef MLEXER_H
#define MLEXER_H

#ifndef __IOSTREAM_H
#include <iostream.h>
#endif

#ifndef MPLATFORM_H
#include <MPlatform.h>
#endif

//The Lexer class is just a collection of functions (static members) designed
//to be used for stream input/output.
//All the functions return a status: 0=success; <0=failure; >0=warning
class Lexer
  {
  public:
    static void setDelim(char delim);
    static char getDelim();
    static int writeDelim(ostream& s, char delim=Delim);
    static int readDelim(istream& s, char delim=Delim);
    static int scanPastDelim(istream& s, char delim=Delim);

    static int writeQuotedString(ostream& s, string& x);
    static int readQuotedString(istream& s, string& x);
    static int writeString(ostream& s, string x); //use only for strings that never contain the delim char, such as identifiers
    static int readString(istream& s, string& x);
    static int writeLong(ostream& s, long x);
    static int readLong(istream& s, long& x);
    static int writeUnsigned(ostream& s, unsigned long x);
    static int readUnsigned(istream& s, unsigned long& x);
    static int writeRectangle(ostream& s, RECTANGLE& x);
    static int readRectangle(istream& s, RECTANGLE& x);
    static int writePoint(ostream& s, POINT& x);
    static int readPoint(istream& s, POINT& x);
  protected:
    static char Delim;
  };
  
#endif