stringcl.h

this is a lp0 compilator new

//
// *****************************************************************
// *
// *    Author          : Gerald ( Jerry ) Carter
// *                      [e-mail]
// *    Filename        : stringcl.cc
// *    Date Created    : 940401
// *    Last update     : 970219
// *
// *    Description
// *    -----------
// *    This file contains all the method defintion for the string
// *    class from "stringcl.h".  Each method is documented individually.
// *
// *****************************************************************
//

// INCLUDE FILES
#include <iostream.h>      // ostream class
#include <string.h>        // strdup ()
#include "logic.h"         // boolean typedefs

#ifndef _STRINGCL_H          // to prevent multiple inclusion
#define _STRINGCL_H

// MACROS
#define MAX_BUF_SIZE 1000   // used in operator/ ()

class string {
   private :
      char        *text;          // char* to text string ('\0' terminated)
      int	  length;	  // length of actual characters in string

   public :
      // CONSTRUCTORS
      string (char, int);	  // allocted string of length int with char in
				  //   each position
      string (char*);		  // allocated copy of char*
      string (void);		  // no text with length = 0
      string (const string&);	  // assigment
      
      // DESTRUCTORS
      ~string (void)		  // destructor
         { delete []text; }

      // OVERLOADED OPERATORS
      string operator+ (char);	               // add char to end of string
      string operator+ (const string&);        // catenates 2 strings
      string operator- (char);	               // delete all instances of char
					       //   in string
      string operator- (int);		       // delete char at int position
      string& operator= (const string&);       // assignment operator
      int operator< (const string&) const;     // simple ascii comparison
      int operator> (const string&) const;     // simple ascii comparison
      int operator== (const string&) const;    // simple ascii comparison
      int operator!= (const string&) const;    // simple ascii comparison
      string operator/ (const char);	       // returns portion of string
					       //   preceding passed character
      string operator% (const char);	       // returns portion of string
                                               //   after passed character 
                                               //   inclusive
      char& operator[] (int) const;	       // returns reference to char at 
                                               //   int position
      friend ostream& operator<< (ostream&, const string&); // get from op
      friend istream& operator>> (istream&, string&);       // put to op
      operator char* (void) const              // cast a string to a char*
         { return text; }
      
      // GENERAL METHODS
      int StrLength (void) const	       // return length of string
         { return length; }
      char* StrText (void) const	       // return allocated copy of 
	 { return strdup(text); }              //   string text

      // static data members
      static const string empty_string;
};    

#endif

//********** end of stringcl.h ******************************************
//***********************************************************************