#define NOARGC  /* no arg count passing */›#define FIXARGC /* don't expect arg counts passed in */›#include <stdio.h>›/*›** xtoi -- convert hex string to integer nbr›**         returns field size, else ERR on error›*/››/* what should this be?? -- jrd */›#define ERR -1››xtoi(hexstr, nbr) ›char *hexstr; ›int *nbr; ›$(›  int d, b;  char *cp;›  d = *nbr = 0; cp = hexstr;›  while(*cp == '0') ++cp;›  while(1) ›    $(›    switch(*cp) ›      $(›      case '0': case '1': case '2':›      case '3': case '4': case '5':›      case '6': case '7': case '8':›      case '9':                     b=48; break;›      case 'A': case 'B': case 'C':›      case 'D': case 'E': case 'F': b=55; break;›      case 'a': case 'b': case 'c':›      case 'd': case 'e': case 'f': b=87; break;›       default: return (cp - hexstr);›      $)›    if(d < 4) ++d; else return (ERR);›    *nbr = (*nbr << 4) + (*cp++ - b);›    $)›$)›