#include <iostream>
#include <string>
#include <stdio.h>
#include <stdlib.h>
// Additional files for file I/O
#include <fstream>
#include <sys/stat.h>
#include <sys/types.h>
// The following header may not be necessary
//#include <fcntl.h>

// Include Boost C++ libraries
#include <boost/filesystem.hpp>
#include "boost/filesystem/operations.hpp"
#include "boost/filesystem/path.hpp"
#include "boost/progress.hpp"


using namespace boost::filesystem;


using namespace std;

int main() {
	string my_str = "This is a string.";

	cout << my_str << endl;
/*
	my_str = system("pwd");
	my_str.append("\b\b\b\b\b\b\b\b extra");
	cout << my_str << "a\b\b\b\b\b\b=" << endl;
*/

	// Declare an output file stream.
	ofstream ofs;
	// Declare an input file stream.
	ifstream ifs;
	
	// Open the output file stream.
	string mystr = "read_me.text";
	ofs.open(mystr.c_str(),ofstream::out);
	// Write some text to the output file stream.
	ofs << "	Hello World." << endl;
	// Close the output file stream.
	ofs.close();

	// Re-open the output file stream with a new name.
	mystr = "new.text";
	ofs.open(mystr.c_str(),ofstream::out);
	// Write some text to the output file stream.
	ofs << "	Overwritten." << endl;
	// Close the output file stream.
	ofs.close();

	// Re-open the output file stream with the old name.
	mystr = "read_me.text";
	ofs.open(mystr.c_str(),ofstream::out);
	// Write some text to the output file stream.
	ofs << "	Finally Overwritten." << endl;
	// Close the output file stream.
	ofs.close();
	
	// File that I want to determine the size of.
	mystr = "/home/arvind/projects/eda/rigatonista/benchmarks/tau2013_contest_library.v2.0.lb";
	// Open input file stream.
	ifs.open(mystr.c_str(),ifstream::in);
	
	// Use C++ STL to determine the size of a file.
	// Get the initial position of the i/p file pointer.
	long initial = ifs.tellg();
	// Bring the i/p file pointer to the end of the file.
	ifs.seekg(0, ios_base::end);
	// Get the final position of the i/p file pointer.
	long final = ifs.tellg();
	cout << "		==Size is:::" << (final - initial) << "=" << endl;
	
	// Use POSIX/UNIX-based stat struct to determine the size of a file.
	struct stat st;
	if(0 == stat(mystr.c_str(), &st)) {
		cout << "		==POSIX/UNIX size:::" << st.st_size << "=" << endl;
	}else{
		cout << "	>>> File does not exist." << endl;
	}
	
	// Use Boost C++ Libraries to determine the size of a file.
	// Create a path for the file.
	path p(mystr);
	cout << p << "==" << endl;
	cout << "		==Boost C++ size:::" << file_size(mystr) << "=" << endl;
	
	
	// Close the input file stream.
	ifs.close();
		
	return 0;
}