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/*
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef PACKED_ATTRIBUTE_HPP_
#define PACKED_ATTRIBUTE_HPP_
/** packed__: lead in macro, requires __packed lead out as well. Consider using __pack(...). */
#ifndef packed__
#ifdef _MSC_VER
#define packed__ __pragma( pack(push, 1) )
#else
#define packed__
#endif
#endif
/** __packed: lead out macro, requires packed__ lead in as well. Consider using __pack(...). */
#ifndef __packed
#ifdef _MSC_VER
#define __packed __pragma( pack(pop))
#else
#define __packed __attribute__ ((packed))
#endif
#endif
/** __pack(...): Produces MSVC, clang and gcc compatible lead-in and -out macros. */
#ifndef __pack
#ifdef _MSC_VER
#define __pack(...) __pragma( pack(push, 1) ) __VA_ARGS__ __pragma( pack(pop))
#else
#define __pack(...) __VA_ARGS__ __attribute__ ((packed))
#endif
#endif
/**
* Safe access to a pointer cast from unaligned memory via __packed__ attribute,
* i.e. utilizing compiler generated safe load and store operations.
* <p>
* This template shall cause no costs, the cast data pointer is identical to 'T & p = &store'.
* </p>
*/
template<typename T> __pack ( struct packed_t {
T store;
} ) ;
#endif /* PACKED_ATTRIBUTE_HPP_ */
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