Done major changes to libisofs, including multisession and reading support

libisofs/util.h

@@ -141,9 +141,13 @@ int ucscmp(const uint16_t *s1, const uint16_t *s2);
 /**
  * Copy up to \p len chars from \p buf and return this newly allocated
  * string. The new string is null-terminated.
- * TODO it would be great to return NULL is the original string was all
- * white spaces.
  */
 char *strcopy(const char *buf, size_t len);
 
+/**
+ * Convert a Joliet string with a length of \p len bytes to a new string
+ * in local charset.
+ */
+char *ucs2str(const char *buf, size_t len);
+
 #endif /* LIBISO_UTIL_H */