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diff --git a/src/3rdparty/harfbuzz-ng/src/hb-map.cc b/src/3rdparty/harfbuzz-ng/src/hb-map.cc
new file mode 100644
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+++ b/src/3rdparty/harfbuzz-ng/src/hb-map.cc
@@ -0,0 +1,268 @@
+/*
+ * Copyright © 2018  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): Behdad Esfahbod
+ */
+
+#include "hb-map.hh"
+
+
+/**
+ * SECTION:hb-map
+ * @title: hb-map
+ * @short_description: Object representing integer to integer mapping
+ * @include: hb.h
+ *
+ * Map objects are integer-to-integer hash-maps.  Currently they are
+ * not used in the HarfBuzz public API, but are provided for client's
+ * use if desired.
+ **/
+
+
+/**
+ * hb_map_create: (Xconstructor)
+ *
+ * Return value: (transfer full):
+ *
+ * Since: 1.7.7
+ **/
+hb_map_t *
+hb_map_create ()
+{
+  hb_map_t *map;
+
+  if (!(map = hb_object_create<hb_map_t> ()))
+    return hb_map_get_empty ();
+
+  map->init_shallow ();
+
+  return map;
+}
+
+/**
+ * hb_map_get_empty:
+ *
+ * Return value: (transfer full):
+ *
+ * Since: 1.7.7
+ **/
+hb_map_t *
+hb_map_get_empty ()
+{
+  return const_cast<hb_map_t *> (&Null(hb_map_t));
+}
+
+/**
+ * hb_map_reference: (skip)
+ * @map: a map.
+ *
+ * Return value: (transfer full):
+ *
+ * Since: 1.7.7
+ **/
+hb_map_t *
+hb_map_reference (hb_map_t *map)
+{
+  return hb_object_reference (map);
+}
+
+/**
+ * hb_map_destroy: (skip)
+ * @map: a map.
+ *
+ * Since: 1.7.7
+ **/
+void
+hb_map_destroy (hb_map_t *map)
+{
+  if (!hb_object_destroy (map)) return;
+
+  map->fini_shallow ();
+
+  free (map);
+}
+
+/**
+ * hb_map_set_user_data: (skip)
+ * @map: a map.
+ * @key:
+ * @data:
+ * @destroy:
+ * @replace:
+ *
+ * Return value:
+ *
+ * Since: 1.7.7
+ **/
+hb_bool_t
+hb_map_set_user_data (hb_map_t           *map,
+		      hb_user_data_key_t *key,
+		      void *              data,
+		      hb_destroy_func_t   destroy,
+		      hb_bool_t           replace)
+{
+  return hb_object_set_user_data (map, key, data, destroy, replace);
+}
+
+/**
+ * hb_map_get_user_data: (skip)
+ * @map: a map.
+ * @key:
+ *
+ * Return value: (transfer none):
+ *
+ * Since: 1.7.7
+ **/
+void *
+hb_map_get_user_data (hb_map_t           *map,
+		      hb_user_data_key_t *key)
+{
+  return hb_object_get_user_data (map, key);
+}
+
+
+/**
+ * hb_map_allocation_successful:
+ * @map: a map.
+ *
+ *
+ *
+ * Return value:
+ *
+ * Since: 1.7.7
+ **/
+hb_bool_t
+hb_map_allocation_successful (const hb_map_t  *map)
+{
+  return map->successful;
+}
+
+
+/**
+ * hb_map_set:
+ * @map: a map.
+ * @key:
+ * @value:
+ *
+ *
+ *
+ * Since: 1.7.7
+ **/
+void
+hb_map_set (hb_map_t       *map,
+	    hb_codepoint_t  key,
+	    hb_codepoint_t  value)
+{
+  map->set (key, value);
+}
+
+/**
+ * hb_map_get:
+ * @map: a map.
+ * @key:
+ *
+ *
+ *
+ * Since: 1.7.7
+ **/
+hb_codepoint_t
+hb_map_get (const hb_map_t *map,
+	    hb_codepoint_t  key)
+{
+  return map->get (key);
+}
+
+/**
+ * hb_map_del:
+ * @map: a map.
+ * @key:
+ *
+ *
+ *
+ * Since: 1.7.7
+ **/
+void
+hb_map_del (hb_map_t       *map,
+	    hb_codepoint_t  key)
+{
+  map->del (key);
+}
+
+/**
+ * hb_map_has:
+ * @map: a map.
+ * @key:
+ *
+ *
+ *
+ * Since: 1.7.7
+ **/
+hb_bool_t
+hb_map_has (const hb_map_t *map,
+	    hb_codepoint_t  key)
+{
+  return map->has (key);
+}
+
+
+/**
+ * hb_map_clear:
+ * @map: a map.
+ *
+ *
+ *
+ * Since: 1.7.7
+ **/
+void
+hb_map_clear (hb_map_t *map)
+{
+  return map->clear ();
+}
+
+/**
+ * hb_map_is_empty:
+ * @map: a map.
+ *
+ *
+ *
+ * Since: 1.7.7
+ **/
+hb_bool_t
+hb_map_is_empty (const hb_map_t *map)
+{
+  return map->is_empty ();
+}
+
+/**
+ * hb_map_get_population:
+ * @map: a map.
+ *
+ *
+ *
+ * Since: 1.7.7
+ **/
+unsigned int
+hb_map_get_population (const hb_map_t *map)
+{
+  return map->get_population ();
+}