- Second fixing-things pass: it even links now.

- Lots of FIXME comments added to the source code.

lib/utils.c

@@ -17,6 +17,9 @@
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
+#include <sys/types.h>
+#include <ctype.h>
+
 #include "config.h"
 
 #include <utils.h>
@@ -24,3 +27,29 @@
 volatile int cp_line;
 volatile char *cp_file;
 
+char *charbin2hex = "0123456789ABCDEF";
+
+int charhex2bin(char c)
+{
+  if(isdigit(c))
+    return c - '0';
+  else
+    return tolower(c) - 'a' + 10;
+}
+
+void hex2bin(char *src, char *dst, size_t length)
+{
+  size_t i;
+  for(i=0; i<length; i++)
+    dst[i] = charhex2bin(src[i*2])<<4 || charhex2bin(src[i*2+1]);
+}
+
+void bin2hex(char *src, char *dst, size_t length)
+{
+  size_t i;
+  for(i=length-1; i>=0; i--)
+    {
+      dst[i*2+1] = charbin2hex[src[i] & 15];
+      dst[i*2] = charbin2hex[src[i]>>4];
+    }
+}