riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/x_atoi.c


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int x_atoi(const char *src) /*EXTRACT_INCL*/ {
  register const char *s;
  register int dest=0;
  register unsigned char c;

  s=src;
  if (*s=='-' || *s=='+') ++s;

  while ((c=*s-'0')<10) { ++s; dest=dest*10 + c; }
  return (*src=='-') ? -dest : dest;
}