Add hb_string_t
diff --git a/src/hb-private.hh b/src/hb-private.hh
index f6dbbe2..b88de08 100644
--- a/src/hb-private.hh
+++ b/src/hb-private.hh
@@ -1137,4 +1137,31 @@
/* Size signifying variable-sized array */
#define VAR 1
+
+/* String type. */
+
+struct hb_string_t
+{
+ inline hb_string_t (void) : bytes (nullptr), len (0) {}
+ inline hb_string_t (const char *bytes_, unsigned int len_) : bytes (bytes_), len (len_) {}
+
+ inline int cmp (const hb_string_t *a) const
+ {
+ if (len != a->len)
+ return (int) a->len - (int) len;
+
+ return memcmp (a->bytes, bytes, len);
+ }
+ static inline int cmp (const void *pa, const void *pb)
+ {
+ hb_string_t *a = (hb_string_t *) pa;
+ hb_string_t *b = (hb_string_t *) pb;
+ return b->cmp (a);
+ }
+
+ const char *bytes;
+ unsigned int len;
+};
+
+
#endif /* HB_PRIVATE_HH */
