// Author: Joseph Bertolami
// Email: jbertola@uci.edu

#ifndef _D_STRING_H_	// may be included more than once
#define _D_STRING_H_

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

class DString
{

	friend class DFile;
	friend class DGFile;

public:

	void setChar(char c, int index);

	// note: before the string is set/reset you cannot use any of the 
	// string functions! b/c buffer == NULL
	DString() : buffer(NULL), length(0) {}
	DString(const DString & rhs);
	DString(const char *str);
	~DString();

	// operator = 
	// assigns rhs to *this
	DString operator = (const DString & rhs);
//	char * operator = (DString & rhs);

	// operator +
	// cat's rhs onto *this
	DString operator + (DString & rhs);

	// operator +=
	DString operator += (DString & rhs);
	DString operator += (char * rhs);

	// char *substr
	// returns a pointer to the first occurrence of
	// string 'token' in string 'str'
	char * substr(const char *token, const char *str);

	char operator [](unsigned int index);

	// do not ignore case for now, b/c input file is all same case!
	bool operator == (DString & rhs);

	// unsigned nsubstr
	// returns number of occurrences of substring token
	// in string 'str'
	unsigned nsubstr(const char *token, const char *str);
	DString substr(int start, int end);

	// returns 0 if no match
	// note, if comparisons begin coming up wrong,
	// slow this function down by enforcing ascii
	// comparison to avoid erroneous data
	int strcmp(DString & string2);

	char *		data();
	void		clear();
	unsigned	size();
	void		print();
	void		set(const char *text);

protected:

	char *buffer;
	unsigned length;
};

#endif