99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
/*
|
|
* 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 */
|