//  This is the header file for the String class as defined in
//  EECS 370.  This follows closely the code written in the Drake
//  text "Object Oriented Programming with C++ and Smalltalk" on 
//  page 697.

#ifndef STRING_C
#define STRING_C

#include <string.h>
#include <iostream>

using namespace std;

class String
{
 // friend functions updated 2/16/2000
 friend bool operator== (const String&, const String&);
 friend ostream& operator<<(ostream&, const String&);

 private:
   char * str_;
   int length_;
   String (int);

 public:
   String ();
   String (char);
   String (const char *);
   String (const String &);
   ~String ();

   int length ();
   int indexOf (char, int = 0);
   bool isSubstring (const String&);
   String concat (const String&);
   void printStr ();

   // updated 2/16/2000
   String& operator=(const String&);
};

// The inline methods of the class are written in the .h file.
// Most methods of this class could be inline methods; however,
// only a few are written as inline to show how to write both
// inline and regular mehtods.

inline String::String()
{
 length_ = 0;
 str_ = new char [1];
 str_[0] = '\0';
}

inline String::String(char ch)
{
 length_ = 1;
 str_ = new char [2];
 str_[0] = ch;
 str_[1] = '\0';
}

inline int String::length()
{
 return length_;
}

inline void String::printStr()
{
 cout << "Length: " << length_ << ", Value: \"" << str_ <<"\"";
}

#endif