-/* $Id: rank1.c,v 1.23 2005-03-08 14:02:12 adam Exp $
+/* $Id: rank1.c,v 1.25 2005-06-14 20:28:54 adam Exp $
Copyright (C) 1995-2005
Index Data ApS
#include <assert.h>
#ifdef WIN32
#include <io.h>
-#else
+#endif
+#if HAVE_UNISTD_H
#include <unistd.h>
#endif
static int log2_int (zint g)
{
int n = 0;
+ if (g < 0)
+ return 0;
while ((g = g>>1))
n++;
return n;