//
//  NBO_file_IO.cpp
//
//  A module to demonstrate reading and writing NBOs to a binary
//    file.
//

#include <iostream>
#include <iomanip>
#include <fstream>

#include "NBO.h"

using namespace std;
namespace
{
	const unsigned int NUMBER_COUNT = 40;

//
//  writeNBOs
//
//  Purpose: To write a series of NBOs to a file.  The numbers
//	     comprise the first NUMBER_COUNT terms of the
//	     Fibonacci sequence.
//  Argument(s):
//	<1> filename: The name of the file
//  Precondition(s):
//	<1> filename.compare("") != 0
//  Returns: N/A
//  Side Effect: The first NUMBER_COUNT Fibonacci numbers are
//		 written to a binary file named filename.
//

	void writeNBOs (const string& filename)
	{
		NBO fibonacci[NUMBER_COUNT];
		ofstream outfile;

		fibonacci[0] = 0;
		fibonacci[1] = 1;
		for(unsigned int i = 2; i < NUMBER_COUNT; i++)
			fibonacci[i] = fibonacci[i - 1] + fibonacci[i - 2];

		outfile.open(filename.c_str(), ios::out | ios::binary);
		for(unsigned int i = 0; i < NUMBER_COUNT; i++)
		{
			NBO term = fibonacci[i];

			outfile.put(term[0]);
			outfile.put(term[1]);
			outfile.put(term[2]);
			outfile.put(term[3]);
		}
		outfile.close();
	}

//
//  readNBOs
//
//  Purpose: To write a series of NBOs from an existing binary
//	     file and print them to standard output.
//  Argument(s):
//	<1> filename: The name of the file
//  Precondition(s):
//	<1> filename.compare("") != 0
//  Returns: N/A
//  Side Effect: The first NUMBER_COUNT numbers are read from
//		 binary file filename and printed to standard
//		 output.
//

	void readNBOs (const string& filename)
	{
		ifstream infile;

		infile.open(filename.c_str(), ios::in | ios::binary);
		for(unsigned int i = 0; i < NUMBER_COUNT; i++)
		{
			NBO number;

			number[0] = infile.get();
			number[1] = infile.get();
			number[2] = infile.get();
			number[3] = infile.get();

			cout << setw(15) << number;
			if(i % 5 == 4)
				cout << endl;
		}
		infile.close();
	}

} // end of anonymous namespace



int main ()
{
	string filename = "Fibonacci.dat";

	writeNBOs(filename);
	readNBOs(filename);

	return 0;
}