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+/*
+ * Copyright © 2022 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ */
+
+#ifndef HB_SUBSET_REPACKER_H
+#define HB_SUBSET_REPACKER_H
+
+#include "hb.h"
+
+HB_BEGIN_DECLS
+
+#ifdef HB_EXPERIMENTAL_API
+/*
+ * struct hb_link_t
+ * width: offsetSize in bytes
+ * position: position of the offset field in bytes
+ * from beginning of subtable
+ * objidx: index of subtable
+ */
+struct hb_link_t
+{
+ unsigned width;
+ unsigned position;
+ unsigned objidx;
+};
+
+typedef struct hb_link_t hb_link_t;
+
+/*
+ * struct hb_object_t
+ * head: start of object data
+ * tail: end of object data
+ * num_real_links: num of offset field in the object
+ * real_links: pointer to array of offset info
+ * num_virtual_links: num of objects that must be packed
+ * after current object in the final serialized order
+ * virtual_links: array of virtual link info
+ */
+struct hb_object_t
+{
+ char *head;
+ char *tail;
+ unsigned num_real_links;
+ hb_link_t *real_links;
+ unsigned num_virtual_links;
+ hb_link_t *virtual_links;
+};
+
+typedef struct hb_object_t hb_object_t;
+
+HB_EXTERN hb_blob_t*
+hb_subset_repack_or_fail (hb_tag_t table_tag,
+ hb_object_t* hb_objects,
+ unsigned num_hb_objs);
+
+#endif
+
+HB_END_DECLS
+
+#endif /* HB_SUBSET_REPACKER_H */