Moved most of the file type detection from cbm_dir.c into a new function

called _cbm_filetype().
Added an assembler include file with the file type definitions from cbm.h.
Added a first implementation of readdir() for the CBMs.


git-svn-id: svn://svn.cc65.org/cc65/trunk@5669 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/cbm/dir.h

@@ -18,7 +18,7 @@
 
 struct DIR {
     int	        fd;             /* File descriptor for directory */
-    unsigned    offs;           /* Current byte offset in directory */
+    unsigned    off;            /* Current byte offset in directory */
     char        name[16+1];     /* Name passed to opendir */
 };