#include <fstream>
#include <cstdlib>
#include <climits>
#include <ctime>
#include <iostream>

using namespace std;

int file_size(const char *filename){
	ifstream ifile;
	ifile.open(filename, ios_base::binary | ios_base::ate);
	int size = ifile.tellg();
	ifile.close();
	return size;
}

int main(int argc,char** argv) {
	for (int i = 0; i < 2; i++) {
		// Read my own program
		ifstream ifile;
		ifile.open(argv[0], ios::binary) ;
		srand( time(NULL) );
		int filesize = file_size(argv[0]);
		int rand_byte = rand() %  ( filesize + 1 );
		// Devide
		ofstream ofile;
		string filename = tempnam(".", "bact-");
		cout << "Creating new bacteria called: "<< filename << " with size:" << file_size(argv[0]) << '\n';;
		ofile.open(filename, ios::binary | ios::out);

		if ( ifile.fail() or ofile.fail() ) {
		   return 1; //error
		}

		int byte_counter = 0;
		while (!ifile.eof()) {
			unsigned char c;

			c = ifile.get();

			if (ifile.fail()) {
				break;
			}
			if (byte_counter == rand_byte and i == 1) { 
				int bit = rand() % CHAR_BIT;
				cout << "Mutating bit: " << bit << " of byte: " << byte_counter << '\n';
				c ^= (1u << bit);
			}
			ofile.put(c);
			byte_counter++;
		}

		ofile.close();
		string executable = "/bin/chmod +x " + filename;
		string run = filename;
		system(executable.c_str());
		//system(run.c_str());
	}
	return 0;
}