/******************************************************************************
 * This program reads bytes from a file and prints them in hexadecimal format.
 * 
 * Copyright © 2021 Richard Lesh.  All rights reserved.
 *****************************************************************************/

#undef NDEBUG

#include "Utils.hpp"
#include <format>
#include <fstream>
#include <iostream>
#include <string>

using namespace Utils;
using namespace std;

void read_binary_file(string filespec) {
	ifstream ifh(filesystem::path(filespec).c_str(), ios_base::binary);
	if (!ifh.good()) {
		throw ios_base::failure("Problem opening input file!");
	}
	unsigned char c;
	int count = 0;
	while (Utils::getbytes(ifh, c)) {
		cout << format("{0:02x} ", int32_t(c));
		++count;
		if (count % 16 == 0) {
			cout << endl;
		}
	}
	if (count % 16 != 0) {
		cout << endl;
	}
	ifh.close();
}

int main(int argc, char **argv) {
	if (argc != 2) {
		cout << "Syntax: " << argv[0] << " {filename}" << endl;
		exit(1);
	}
	string const FILESPEC = string(argv[1]);
	try {
		read_binary_file(FILESPEC);
	} catch (ios_base::failure ex) {
		cout << "Error: " << Utils::exceptionMessage<char>(ex) << endl;
	} catch (...) {
		cout << "Unexpected File Read Error" << endl;
	}
	return 0;
}