godot/thirdparty/harfbuzz/src/hb-machinery.hh

/*
 * Copyright © 2007,2008,2009,2010  Red Hat, Inc.
 * Copyright © 2012,2018  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_MACHINERY_HH
#define HB_MACHINERY_HH

#include "hb.hh"
#include "hb-blob.hh"

#include "hb-dispatch.hh"
#include "hb-sanitize.hh"


/*
 * Casts
 */

/* StructAtOffset<T>(P,Ofs) returns the struct T& that is placed at memory
 * location pointed to by P plus Ofs bytes. */
template<typename Type>
static inline const Type& StructAtOffset(const void *P, unsigned int offset)
{ … }
template<typename Type>
static inline Type& StructAtOffset(void *P, unsigned int offset)
{ … }
template<typename Type>
static inline const Type& StructAtOffsetUnaligned(const void *P, unsigned int offset)
{ … }
template<typename Type>
static inline Type& StructAtOffsetUnaligned(void *P, unsigned int offset)
{ … }

/* StructAfter<T>(X) returns the struct T& that is placed after X.
 * Works with X of variable size also.  X must implement get_size() */
template<typename Type, typename TObject>
static inline const Type& StructAfter(const TObject &X)
{ … }
template<typename Type, typename TObject>
static inline Type& StructAfter(TObject &X)
{ … }


/*
 * Size checking
 */

/* Size signifying variable-sized array */
#ifndef HB_VAR_ARRAY
#define HB_VAR_ARRAY …
#endif

/* Check _assertion in a method environment */
#define _DEFINE_INSTANCE_ASSERTION1(_line, _assertion) …
#define _DEFINE_INSTANCE_ASSERTION0(_line, _assertion) …
#define DEFINE_INSTANCE_ASSERTION(_assertion) …

/* Check that _code compiles in a method environment */
#define _DEFINE_COMPILES_ASSERTION1(_line, _code) …
#define _DEFINE_COMPILES_ASSERTION0(_line, _code) …
#define DEFINE_COMPILES_ASSERTION(_code) …


#define DEFINE_SIZE_STATIC(size) …

#define DEFINE_SIZE_UNION(size, _member) …

#define DEFINE_SIZE_MIN(size) …

#define DEFINE_SIZE_UNBOUNDED(size) …

#define DEFINE_SIZE_ARRAY(size, array) …

#define DEFINE_SIZE_ARRAY_SIZED(size, array) …



/*
 * Lazy loaders.
 *
 * The lazy-loaders are thread-safe pointer-like objects that create their
 * instead on-demand.  They also support access to a "data" object that is
 * necessary for creating their instance.  The data object, if specified,
 * is accessed via pointer math, located at a location before the position
 * of the loader itself.  This avoids having to store a pointer to data
 * for every lazy-loader.  Multiple lazy-loaders can access the same data.
 */

template <typename Data, unsigned int WheresData>
struct hb_data_wrapper_t
{ … };
template <>
struct hb_data_wrapper_t<void, 0>
{ … };

template <typename T1, typename T2> struct hb_non_void_t { … };
hb_non_void_t<void, T2>;

template <typename Returned,
	  typename Subclass = void,
	  typename Data = void,
	  unsigned int WheresData = 0,
	  typename Stored = Returned>
struct hb_lazy_loader_t : hb_data_wrapper_t<Data, WheresData>
{ … };

/* Specializations. */

template <typename T, unsigned int WheresFace>
struct hb_face_lazy_loader_t : hb_lazy_loader_t<T,
						hb_face_lazy_loader_t<T, WheresFace>,
						hb_face_t, WheresFace>
{ … };

template <typename T, unsigned int WheresFace, bool core=false>
struct hb_table_lazy_loader_t : hb_lazy_loader_t<T,
						 hb_table_lazy_loader_t<T, WheresFace, core>,
						 hb_face_t, WheresFace,
						 hb_blob_t>
{ … };

#define HB_DEFINE_TYPE_FUNCS_LAZY_LOADER_T …

HB_DEFINE_TYPE_FUNCS_LAZY_LOADER_T;
HB_DEFINE_TYPE_FUNCS_LAZY_LOADER_T;
HB_DEFINE_TYPE_FUNCS_LAZY_LOADER_T;
HB_DEFINE_TYPE_FUNCS_LAZY_LOADER_T;

#undef HB_DEFINE_TYPE_FUNCS_LAZY_LOADER_T


#endif /* HB_MACHINERY_HH */