1 files changed, 96 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-multimap.hh b/gfx/harfbuzz/src/hb-multimap.hh
new file mode 100644
index 0000000000..0184279c12
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-multimap.hh
@@ -0,0 +1,96 @@
+/*
+ * Copyright © 2022  Behdad Esfahbod
+ *
+ *  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_MULTIMAP_HH
+#define HB_MULTIMAP_HH
+
+#include "hb.hh"
+#include "hb-map.hh"
+#include "hb-vector.hh"
+
+
+/*
+ * hb_multimap_t
+ */
+
+struct hb_multimap_t
+{
+  void add (hb_codepoint_t k, hb_codepoint_t v)
+  {
+    hb_vector_t<hb_codepoint_t> *m;
+    if (multiples.has (k, &m))
+    {
+      m->push (v);
+      return;
+    }
+
+    hb_codepoint_t *old_v;
+    if (singulars.has (k, &old_v))
+    {
+      hb_codepoint_t old = *old_v;
+      singulars.del (k);
+
+      multiples.set (k, hb_vector_t<hb_codepoint_t> {old, v});
+      return;
+    }
+
+    singulars.set (k, v);
+  }
+
+  hb_array_t<const hb_codepoint_t> get (hb_codepoint_t k) const
+  {
+    const hb_codepoint_t *v;
+    if (singulars.has (k, &v))
+      return hb_array (v, 1);
+
+    hb_vector_t<hb_codepoint_t> *m;
+    if (multiples.has (k, &m))
+      return m->as_array ();
+
+    return hb_array_t<const hb_codepoint_t> ();
+  }
+
+  bool in_error () const
+  {
+    if (singulars.in_error () || multiples.in_error ())
+      return true;
+    for (const auto &m : multiples.values_ref ())
+      if (m.in_error ())
+        return true;
+    return false;
+  }
+
+  void alloc (unsigned size)
+  {
+    singulars.alloc (size);
+  }
+
+  protected:
+  hb_map_t singulars;
+  hb_hashmap_t<hb_codepoint_t, hb_vector_t<hb_codepoint_t>> multiples;
+};
+
+
+
+#endif /* HB_MULTIMAP_HH */