base_string.h

Go to the documentation of this file.

#ifndef BASE_STRING_CLASS
#define BASE_STRING_CLASS
 
/*****************************************************************************\
*                                                                             *
*  Name   : base_string                                                       *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 1992-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/
 
//hmmm: some of these methods could be pulled out to a base_array class.
//      that would be a nice further abstraction.
 
#include "contracts.h"
 
namespace basis {
 
 
class base_string : public virtual orderable
{
public:
  virtual int length() const = 0;
 
  virtual const char *observe() const = 0;
 
  virtual char *access() = 0;
 
  virtual char get(int index) const = 0;
 
  virtual void put(int position, char to_put) = 0;
 
  virtual bool sub_compare(const base_string &to_compare, int start_first,
          int start_second, int count, bool case_sensitive) const = 0;
 
  virtual base_string &assign(const base_string &s) = 0;
 
  virtual base_string &upgrade(const char *s) = 0;
 
  virtual void insert(int position, const base_string &to_insert) = 0;
 
  virtual void zap(int start, int end) = 0;
 
  virtual base_string &concatenate_string(const base_string &s) = 0;
 
  virtual base_string &concatenate_char(char c) = 0;
 
  virtual bool sub_string(base_string &target, int start, int end) const = 0;
 
 
  virtual base_string &operator =(const base_string &to_copy) { return assign(to_copy); }
};
 
} //namespace.
 
#endif