#include <stdio.h>
#include <ctype.h>

void hexdump(void *pAddressIn, long  lSize)
{
 char szBuf[100];
 long lIndent = 1;
 long lOutLen, lIndex, lIndex2, lOutLen2;
 long lRelPos;
 struct { char *pData; unsigned long lSize; } buf;
 unsigned char *pTmp,ucTmp;
 unsigned char *pAddress = (unsigned char *)pAddressIn;

   buf.pData   = (char *)pAddress;
   buf.lSize   = lSize;

   while (buf.lSize > 0)
   {
      pTmp     = (unsigned char *)buf.pData;
      lOutLen  = (int)buf.lSize;
      if (lOutLen > 16)
          lOutLen = 16;

      // create a 64-character formatted output line:
      sprintf(szBuf, " >                            "
                     "                      "
                     "    %08lX", pTmp-pAddress);
      lOutLen2 = lOutLen;

      for(lIndex = 1+lIndent, lIndex2 = 53-15+lIndent, lRelPos = 0;
          lOutLen2;
          lOutLen2--, lIndex += 2, lIndex2++
         )
      {
         ucTmp = *pTmp++;

         sprintf(szBuf + lIndex, "%02X ", (unsigned short)ucTmp);
         if(!isprint(ucTmp))  ucTmp = '.'; // nonprintable char
         szBuf[lIndex2] = ucTmp;

         if (!(++lRelPos & 3))     // extra blank after 4 bytes
         {  lIndex++; szBuf[lIndex+2] = ' '; }
      }

      if (!(lRelPos & 3)) lIndex--;

      szBuf[lIndex  ]   = '<';
      szBuf[lIndex+1]   = ' ';

      printf("%s\n", szBuf);

      buf.pData   += lOutLen;
      buf.lSize   -= lOutLen;
   }
}

int main(int argc, char *argv[])
{
   char abStack[100];

   printf("hello world, dump of abStack follows:\n");
   hexdump(abStack, 100);
}