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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
{
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);
template <typename Type>
inline const Type* as (void) const
{
return length < hb_null_size (Type) ? &Null(Type) : reinterpret_cast<const Type *> (data);
}
inline hb_bytes_t as_bytes (void) const
{
return hb_bytes_t (data, length);
}
public:
hb_object_header_t header;
const char *data;
unsigned int length;
hb_memory_mode_t mode;
void *user_data;
hb_destroy_func_t destroy;
};
/*
* hb_blob_ptr_t
*/
template <typename P>
struct hb_blob_ptr_t
{
typedef typename hb_remove_pointer (P) T;
inline hb_blob_ptr_t (hb_blob_t *b_ = nullptr) : b (b_) {}
inline hb_blob_t * operator = (hb_blob_t *b_) { return b = b_; }
inline const T * operator -> (void) const { return get (); }
inline const T & operator * (void) const { return *get (); }
template <typename C> inline operator const C * (void) const { return get (); }
inline operator const char * (void) const { return (const char *) get (); }
inline const T * get (void) const { return b->as<T> (); }
inline hb_blob_t * get_blob (void) const { return b.get_raw (); }
inline unsigned int get_length (void) const { return b.get ()->length; }
inline void destroy (void) { hb_blob_destroy (b.get ()); b = nullptr; }
hb_nonnull_ptr_t<hb_blob_t> b;
};
#endif /* HB_BLOB_HH */
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