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/*
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* Copyright © 2009 Red Hat, Inc.
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* Copyright © 2018 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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54232
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#ifndef HB_BLOB_HH
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#define HB_BLOB_HH
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50826
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54232
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#include "hb.hh"
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50826
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/*
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* hb_blob_t
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*/
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struct hb_blob_t
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{
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54232
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void fini_shallow () { destroy_user_data (); }
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54232
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void destroy_user_data ()
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{
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if (destroy)
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{
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destroy (user_data);
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user_data = nullptr;
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destroy = nullptr;
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}
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}
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HB_INTERNAL bool try_make_writable ();
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HB_INTERNAL bool try_make_writable_inplace ();
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HB_INTERNAL bool try_make_writable_inplace_unix ();
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template <typename Type>
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const Type* as () const
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{
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return length < hb_null_size (Type) ? &Null(Type) : reinterpret_cast<const Type *> (data);
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}
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hb_bytes_t as_bytes () const
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{ return hb_bytes_t (data, length); }
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public:
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hb_object_header_t header;
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const char *data;
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unsigned int length;
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hb_memory_mode_t mode;
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void *user_data;
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hb_destroy_func_t destroy;
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};
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/*
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* hb_blob_ptr_t
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*/
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template <typename P>
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struct hb_blob_ptr_t
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{
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typedef typename hb_remove_pointer (P) T;
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hb_blob_ptr_t (hb_blob_t *b_ = nullptr) : b (b_) {}
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hb_blob_t * operator = (hb_blob_t *b_) { return b = b_; }
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const T * operator -> () const { return get (); }
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const T & operator * () const { return *get (); }
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template <typename C> operator const C * () const { return get (); }
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operator const char * () const { return (const char *) get (); }
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const T * get () const { return b->as<T> (); }
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hb_blob_t * get_blob () const { return b.get_raw (); }
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unsigned int get_length () const { return b.get ()->length; }
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void destroy () { hb_blob_destroy (b.get ()); b = nullptr; }
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hb_nonnull_ptr_t<hb_blob_t> b;
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};
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#endif /* HB_BLOB_HH */
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