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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_HH
#define HB_BLOB_HH
#include "hb.hh"
/*
* hb_blob_t
*/
struct hb_blob_t
{
~hb_blob_t () { destroy_user_data (); }
void destroy_user_data ()
{
if (destroy)
{
destroy (user_data);
user_data = nullptr;
destroy = nullptr;
}
}
HB_INTERNAL bool try_make_writable ();
HB_INTERNAL bool try_make_writable_inplace ();
HB_INTERNAL bool try_make_writable_inplace_unix ();
hb_bytes_t as_bytes () const { return hb_bytes_t (data, length); }
template <typename Type>
const Type* as () const { return as_bytes ().as<Type> (); }
public:
hb_object_header_t header;
const char *data = nullptr;
unsigned int length = 0;
hb_memory_mode_t mode = (hb_memory_mode_t) 0;
void *user_data = nullptr;
hb_destroy_func_t destroy = nullptr;
};
/*
* hb_blob_ptr_t
*/
template <typename P>
struct hb_blob_ptr_t
{
typedef hb_remove_pointer<P> T;
hb_blob_ptr_t (hb_blob_t *b_ = nullptr) : b (b_) {}
hb_blob_t * operator = (hb_blob_t *b_) { return b = b_; }
const T * operator -> () const { return get (); }
const T & operator * () const { return *get (); }
template <typename C> operator const C * () const { return get (); }
operator const char * () const { return (const char *) get (); }
const T * get () const { return b->as<T> (); }
hb_blob_t * get_blob () const { return b.get_raw (); }
unsigned int get_length () const { return b.get ()->length; }
void destroy () { hb_blob_destroy (b.get_raw ()); b = nullptr; }
private:
hb_nonnull_ptr_t<hb_blob_t> b;
};
#endif /* HB_BLOB_HH */
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