// Micheal H. McCabe
// October 7, 2022
// Hexadecimal Dump of card / tape files
// Part of the Retrochallenge 2022/10

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

#define IFNAME "BinaryDump.cpp"

string Hex="0123456789ABCDEF";
string PrintHex4(int V);
string PrintHex2(int V);

int main()
{
	streampos size;
	char * memblock;
	ifstream infile(IFNAME, ios::in|ios::binary|ios::ate);

	if (infile.is_open())
		{
		  size = infile.tellg();
		  if (size>65535)
		    {
		      cout << "Filesize too large for this program. 64k Maximum exceeded." << endl;
			}
		  memblock = new char [size];
                  infile.seekg(0, ios::beg);
                  infile.read(memblock, size);
                  infile.close();

          for (int address=0; address<=size; address=address+16)
            {
              cout << PrintHex4(address) << ": ";	
              for (int addr2=0; addr2<16; addr2++)
                {
                  int byte;
                  int vector=address+addr2;
                  if (vector<=size)
                   {
                   byte=int(memblock[vector]);
                   }
                   else 
				   {
				   byte = 0;
			       }
                  cout << PrintHex2(byte) << " ";
				}
				cout << endl;
			}
		}
		
	
	return 0;
}

string PrintHex4(int v)
  {
  	int page=v/256;
  	int byte=v-(page*256);
  	string addr = PrintHex2(page)+PrintHex2(byte);
	return addr;
  }
  
string PrintHex2(int v)
  { 
     string Hex="0123456789ABCDEF";
	 int h=v/16;
	 int l=v-(h*16);
	 string data = Hex.substr(h,1)+Hex.substr(l,1);
	 return data;
  }