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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.
+ *
+ * Google Author(s): Garret Rieger
+ */
+
+#ifndef HB_SUBSET_ACCELERATOR_HH
+#define HB_SUBSET_ACCELERATOR_HH
+
+
+#include "hb.hh"
+
+#include "hb-map.hh"
+#include "hb-set.hh"
+
+struct hb_subset_accelerator_t
+{
+ static hb_user_data_key_t* user_data_key()
+ {
+ static hb_user_data_key_t key;
+ return &key;
+ }
+
+ static hb_subset_accelerator_t* create(const hb_map_t& unicode_to_gid_,
+ const hb_set_t& unicodes_) {
+ hb_subset_accelerator_t* accel =
+ (hb_subset_accelerator_t*) hb_malloc (sizeof(hb_subset_accelerator_t));
+ new (accel) hb_subset_accelerator_t (unicode_to_gid_, unicodes_);
+ return accel;
+ }
+
+ static void destroy(void* value) {
+ if (!value) return;
+
+ hb_subset_accelerator_t* accel = (hb_subset_accelerator_t*) value;
+ accel->~hb_subset_accelerator_t ();
+ hb_free (accel);
+ }
+
+ hb_subset_accelerator_t(const hb_map_t& unicode_to_gid_,
+ const hb_set_t& unicodes_)
+ : unicode_to_gid(unicode_to_gid_), unicodes(unicodes_) {}
+
+ const hb_map_t unicode_to_gid;
+ const hb_set_t unicodes;
+ // TODO(garretrieger): cumulative glyf checksum map
+ // TODO(garretrieger): sanitized table cache.
+
+ bool in_error () const
+ {
+ return unicode_to_gid.in_error() || unicodes.in_error ();
+ }
+};
+
+
+#endif /* HB_SUBSET_ACCELERATOR_HH */