//  File: bstring.h
//
//  Header file for buffered string

#ifndef _bstring_h
#define _bstring_h

#include <iostream.h>

class BString {
friend ostream& operator <<(ostream&, const BString&) ;

public:

   // Constructors
   //
   BString() ;                  // Default constructor
   BString(int) ;               // Constructor with initial buffer size
   BString(char *s, int n=0);   // Initialize with string & opt buffer size
   BString(const BString&) ;    // Copy Constructor


   // Destructor
   //
   ~BString() ;


   // Add char(s) to the end of this string
   //
   void append(char) ;
   void append(const char *) ;
   void append(const BString&) ;

   // Remove char(s) at the end of the string
   //
   void chop(int n=1) ;

   // Reduce buffer size if possible
   //
   void trim() ;
   void force_trim() ;


   // Overloaded Operators
   //

   BString& operator =(const BString&) ;    // assignment
   BString  operator +(const BString&) ;    // + is concatenate
   char& operator [](int) ;

   bool operator  <(const BString&) ;       // comparisons
   bool operator <=(const BString&) ;
   bool operator ==(const BString&) ;
   bool operator >=(const BString&) ;
   bool operator  >(const BString&) ;

   // Type conversion
   //
   operator char *() ;

   void GetLine(istream&) ;

   inline int length() { return len ;} 

   void debug() ;
private:

   char *str ;
   int len ;
   int bufsize ;
} ;

istream& operator >>(istream&, BString&) ;
ostream& operator <<(ostream&, const BString&) ;

#endif