/*
 * Crusty Old Ram Dump code - circa 1996, hacked for CS560
 *   A. J. Wright - <ajw@utk.edu>
 *     For free use in the CS560 class.
 *
 *   Two Arguments:
 *     1. An offset from the beginning of main_memory to start printing
 *     2. The number of bytes to print.
 *
 *   Output: pretty-printed RAM dump to stdout
 *
 *  Example ... and perhaps a hint.
 *    dumpRam (pcb->base + pcb->limit - 160, 160);
 *
 *  Your milage may vary.  Good luck.
 *
 *  NOTE: This does not meet the coding standards for CS560.
 */

/* You may need to modify these, depending on your code. */
#include <sys/types.h>
#include "jos.h"

void
dumpRam (size_t start, size_t length)
{
  unsigned char *aBuf = &main_memory[start];
  int Current = 0, Begin = 0, i;

  while (Current < length)
    {
      printf (" %.8x  ", (unsigned int) Current + start);
      Begin = Current;

      for (i = 0; i < 8; i++)
	{
	  printf ("%.2hx ", aBuf[Current++]);
	  if (Current > length)
	    {
	      while (++i < 8)
		printf ("   ");
	      break;
	    }
	}

      if (Current <= length)
	{
	  printf ("- ");
	  for (i = 0; i < 8; i++)
	    {
	      printf ("%.2hx ", aBuf[Current++]);
	      if (Current > length)
		{
		  while (++i < 8)
		    printf ("   ");
		  break;
		}
	    }
	  printf ("   ");
	}
      else
	printf ("                             ");

      for (i = 0; i < 16; i++)
	{
	  if (isprint ((int) aBuf[Begin]))
	    printf ("%c", aBuf[Begin]);
	  else
	    printf ("_");
	  Begin++;
	  if (Begin > length)
	    {
	      printf ("\n");
	      return;
	    }
	}

      printf ("\n");
    }
}