#ifndef __STRING_HPP
#define __STRING_HPP

class ostream;
class istream;

class String {
	char *buf;
	int buflen;
	int textlen;

public:
	String();
	String(const String& s);
	String(const char *s);
	String(istream& i);

	~String();

	/* Access methods */
	//array subscript
	char& operator[](int i);
	//get n'th char - a bit faster than []
	char operator()(int i) const;
	//return pointer to string (ASCIIZ)
	operator char*();

	//assignment
	String& operator=(const String& s);
	String& operator=(const char *s);

	/* Comparision operators */
	static int compare(const String& s1, const String& s2);
	int operator==(const String& s2) const
	  { return compare(*this,s2)==0; }
	int operator!=(const String& s2) const
	  { return compare(*this,s2)!=0; }
	int operator<=(const String& s2) const
	  { return compare(*this,s2)<=0; }
	int operator<(const String& s2) const
	  { return compare(*this,s2)<0; }
	int operator>=(const String& s2) const
	  { return compare(*this,s2)>=0; }
	int operator>(const String& s2) const
	  { return compare(*this,s2)>0; }

	/* concatenation */
	String& operator+=(char c);
	String& operator+=(const String& s);

	int length() const;

	int expandTo(int newlen,int keep=1);

	friend ostream& operator<<(ostream& o, const String& s);
	friend istream& operator>>(istream& o, String& s);
};

inline int length(const String& s) {
	return s.length();
}

#endif