*valerie_dir_entry, valerie_dir_entry_t;
/* Directory reading. */
-extern valerie_dir valerie_dir_init( valerie, char * );
+extern valerie_dir valerie_dir_init( valerie, const char * );
extern valerie_error_code valerie_dir_get_error_code( valerie_dir );
extern valerie_error_code valerie_dir_get( valerie_dir, int, valerie_dir_entry );
extern int valerie_dir_count( valerie_dir );
/* Miscellaenous functions */
extern valerie_response valerie_get_last_response( valerie );
-extern char *valerie_error_description( valerie_error_code );
+extern const char *valerie_error_description( valerie_error_code );
/* Courtesy functions. */
extern valerie_error_code valerie_execute( valerie, size_t, const char *, ... );
-extern valerie_error_code valerie_push( valerie, mlt_service, size_t, char *, ... );
+extern valerie_error_code valerie_push( valerie, mlt_service, size_t, const char *, ... );
/* Close function. */
extern void valerie_close( valerie );