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/*************************************************************************
* Copyright (C) 2009-2014 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Compiler abstractions.
*/
/**
* @internal
* @def DMNSN_C_VERSION
* The C version according to \p __STDC_VERSION__ if available, otherwise 0.
*/
#ifdef __STDC_VERSION__
#define DMNSN_C_VERSION __STDC_VERSION__
#else
#define DMNSN_C_VERSION 0L
#endif
/**
* @internal
* @def DMNSN_CXX_VERSION
* The C++ version according to \p __cplusplus if available, otherwise 0.
*/
#ifdef __cplusplus
#define DMNSN_CXX_VERSION __cplusplus
#else
#define DMNSN_CXX_VERSION 0L
#endif
/**
* @internal
* Whether we're being compiled as C++.
*/
#define DMNSN_CXX (DMNSN_CXX_VERSION > 0)
/**
* @internal
* Whether C++11 features are supported.
*/
#define DMNSN_CXX11 (DMNSN_CXX_VERSION >= 201103L)
/**
* @internal
* Whether C99 features are supported.
*/
#define DMNSN_C99 (DMNSN_C_VERSION >= 199901L || DMNSN_CXX11)
/**
* @internal
* Whether C11 features are supported.
*/
#define DMNSN_C11 (DMNSN_C_VERSION >= 201112L)
/**
* @internal
* Whether GNU C features are supported.
*/
#define DMNSN_GNUC defined(__GNUC__)
/**
* @def DMNSN_INLINE
* A portable inline specifier. Expands to the correct method of declaring
* inline functions for the version of C you are using.
*/
#ifndef DMNSN_INLINE
#if DMNSN_CXX
/* C++ inline semantics */
#define DMNSN_INLINE inline
#elif DMNSN_C99
/* C99 inline semantics */
#define DMNSN_INLINE inline
#elif DMNSN_GNUC
/* GCC inline semantics */
#define DMNSN_INLINE __extension__ extern __inline__
#else
/* Unknown C - mark functions static and hope the compiler is smart enough
to inline them */
#define DMNSN_INLINE static
#endif
#endif
/**
* @def DMNSN_NORETURN
* A portable noreturn attribute.
*/
#if DMNSN_CXX11
#define DMNSN_NORETURN [[noreturn]] void
#elif DMNSN_C11
#define DMNSN_NORETURN _Noreturn void
#elif DMNSN_GNUC
#define DMNSN_NORETURN __attribute__((noreturn)) void
#else
#define DMNSN_NORETURN void
#endif
/**
* @internal
* @def DMNSN_FUNC
* @brief Expands to the name of the current function
*/
#if DMNSN_GNUC
#define DMNSN_FUNC __PRETTY_FUNCTION__
#elif DMNSN_C99
#define DMNSN_FUNC __func__
#else
#define DMNSN_FUNC "<unknown function>"
#endif
/**
* @internal
* An unreachable statement.
*/
#if DMNSN_GNUC
#define DMNSN_UNREACHABLE() __builtin_unreachable()
#else
#define DMNSN_UNREACHABLE() ((void)0)
#endif
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