//	Larry Bush		April 26, 2002
//
//	email		:	bushl2@rpi.edu
//					Lawrence_Bush@dps.state.ny.us
//
//	Student ID	:	660 220 742  
//
//  File Name	:	traverse.h
//	Final Proj.	:	Grep for Windows
//	Class		:	Operating Systems
//	Instructor	:	Susan Bonner
//	Language	:	C++
//	


//******************************************************************************************
//******************************************************************************************
//******************************************************************************************
//*************                                                               **************
//*************                          Traverse Object                       **************
//*************                                                               **************
//*************                           Header File                         **************
//*************                                                               **************
//******************************************************************************************
//******************************************************************************************
//******************************************************************************************
//		traverse.h	Declares the traverse class, which traverses all the subdirectories of a
//				given subdirectory.  It also uses the buffer class to process each file that
//				it finds.  It performs these tasks on a separate thread from the main program.
//				The traverse class manages its own thread.  In other words, the thread is called
//				by a member function of the class.  This thread is premptable.  In other words
//				the user may stop the grep process in mid stream.  The idea behind this is that
//				the user may have made a mistake and invoked a process that will take a very 
//				long time or possibly have unintended (bad) consequence.  The traverse class
//				also handles this functionality.
//
// traverse.h: interface for the traverse class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_TRAVERSE_H__A892AC06_6934_41DF_A784_5C8E45F6EEED__INCLUDED_)
#define AFX_TRAVERSE_H__A892AC06_6934_41DF_A784_5C8E45F6EEED__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include <windows.h>
//#include "buffer.h"

// thread stuff
typedef unsigned (WINAPI  *PBEGINTHREADEX_THREADFUNC) (
													   LPVOID LPTHREADPARAMETER
													   );

typedef unsigned *PBEGINTHREADEX_THREADID;

// end thread stuff

class traverse  
{
	
private:
	char * mv_currentDirectoryPath; // declare variable to store directory path
	char * mv_word_to_find;// declare variable to store the word to find
	char * mv_replacement_word;// declare variable to store the replacement word
	bool stop;// = 0; // should thread stop? 1=yes
	
	
public:
	// Declare public members
 
	// funny c++ object thread function declaration
	static DWORD WINAPI ThreadFunc (LPVOID param);	
	traverse(char * currentDirectoryPath, char * word_to_find, char * replacement_word);
	virtual ~traverse(); // declare virtual destructor
	// declare search helper function
	int DirSearchHelper(char * currentDirectoryPath, char * word_to_find, char * replacement_word);
	// declare dir or file function
	void DirectoryOrFile( WIN32_FIND_DATA findData, char * currentDirectoryPath, char * word_to_find, char * replacement_word );
	// declare the multithreaded traverse function
	void multithreaded_traverse();
	
};

#endif // !defined(AFX_TRAVERSE_H__A892AC06_6934_41DF_A784_5C8E45F6EEED__INCLUDED_)