indimacros.h

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/*
    Copyright (C) 2021 by Pawel Soja <kernel32.pl@gmail.com>
 
    This 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 2.1 of the License, or (at your option) any later version.
 
    This 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 library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/
 
#pragma once
 
#ifndef INDI_UNUSED
# define INDI_UNUSED(x) (void)x
#endif
 
#ifndef INDI_HAS_CPP_ATTRIBUTE
# ifdef __has_cpp_attribute
#   define INDI_HAS_CPP_ATTRIBUTE(x)  __has_cpp_attribute(x)
# else
#   define INDI_HAS_CPP_ATTRIBUTE(x)  0
# endif
#endif
 
#ifndef INDI_HAS_ATTRIBUTE
# ifdef __has_attribute
#   define INDI_HAS_ATTRIBUTE(x)      __has_attribute(x)
# else
#   define INDI_HAS_ATTRIBUTE(x)   0
# endif
#endif
 
#ifndef INDI_FALLTHROUGH
# if defined(__cplusplus)
#  if INDI_HAS_CPP_ATTRIBUTE(clang::fallthrough)
#   define INDI_FALLTHROUGH [[clang::fallthrough]]
#  elif INDI_HAS_CPP_ATTRIBUTE(gnu::fallthrough)
#   define INDI_FALLTHROUGH [[gnu::fallthrough]]
#  elif INDI_HAS_CPP_ATTRIBUTE(fallthrough)
#   define INDI_FALLTHROUGH [[fallthrough]]
#  endif
# else
#  if INDI_HAS_ATTRIBUTE(fallthrough)
#   define INDI_FALLTHROUGH __attribute__((fallthrough))
#  else
#   define INDI_FALLTHROUGH do {} while (0)
#  endif
# endif
#endif
 
#if defined(__cplusplus)
 
template <typename T>
static inline T *getPtrHelper(T *ptr) { return ptr; }
 
template <typename Wrapper>
static inline typename Wrapper::element_type *getPtrHelper(const Wrapper &p) { return p.get(); }
 
#define DECLARE_PRIVATE(Class) \
    inline Class##Private* d_func() { return reinterpret_cast<Class##Private *>(getPtrHelper(this->d_ptr)); } \
    inline const Class##Private* d_func() const { return reinterpret_cast<const Class##Private *>(getPtrHelper(this->d_ptr)); } \
    friend Class##Private;
 
#define DECLARE_PRIVATE_D(Dptr, Class) \
    inline Class##Private* d_func() { return reinterpret_cast<Class##Private *>(getPtrHelper(Dptr)); } \
    inline const Class##Private* d_func() const { return reinterpret_cast<const Class##Private *>(getPtrHelper(Dptr)); } \
    friend Class##Private;
 
#define D_PTR(Class) Class##Private * const d = d_func()
 
#endif
 
// enable warnings for printf-style functions
#ifndef ATTRIBUTE_FORMAT_PRINTF
# if INDI_HAS_ATTRIBUTE(format)
#  define ATTRIBUTE_FORMAT_PRINTF(A, B) __attribute__((format(printf, (A), (B))))
# else
#  define ATTRIBUTE_FORMAT_PRINTF(A, B)
# endif
#endif