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+/*
+ * Copyright © 2009 Red Hat, Inc.
+ * 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.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_BLOB_PRIVATE_HH
+#define HB_BLOB_PRIVATE_HH
+
+#include "hb-private.hh"
+
+#include "hb-object-private.hh"
+
+
+/*
+ * hb_blob_t
+ */
+
+struct hb_blob_t
+{
+ inline void fini_shallow (void)
+ {
+ destroy_user_data ();
+ }
+
+ inline void destroy_user_data (void)
+ {
+ if (destroy)
+ {
+ destroy (user_data);
+ user_data = nullptr;
+ destroy = nullptr;
+ }
+ }
+
+ HB_INTERNAL bool try_make_writable (void);
+ HB_INTERNAL bool try_make_writable_inplace (void);
+ HB_INTERNAL bool try_make_writable_inplace_unix (void);
+
+ inline void lock (void)
+ {
+ hb_blob_make_immutable (this);
+ }
+
+ template <typename Type>
+ inline const Type* as (void) const
+ {
+ return unlikely (!data) ? &Null(Type) : reinterpret_cast<const Type *> (data);
+ }
+
+ public:
+ hb_object_header_t header;
+ ASSERT_POD ();
+
+ bool immutable;
+
+ const char *data;
+ unsigned int length;
+ hb_memory_mode_t mode;
+
+ void *user_data;
+ hb_destroy_func_t destroy;
+};
+
+
+#endif /* HB_BLOB_PRIVATE_HH */