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dindexer/include/helpers/lengthof.h

37 lines
1.2 KiB
C++

/* Copyright 2015, 2016, Michele Santullo
* This file is part of "dindexer".
*
* "dindexer" is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* "dindexer" 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with "dindexer". If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef id19B690A53A9546D5BD95D89FFF388283
#define id19B690A53A9546D5BD95D89FFF388283
#if defined(__cplusplus)
# include <cstddef>
#else
# include <stddef.h>
#endif
#if defined(lengthof)
# undef lengthof
#endif
//http://stackoverflow.com/questions/4415524/common-array-length-macro-for-c#4415646
#if defined(__cplusplus)
# define lengthof(x) ((sizeof(x)/sizeof(0[x])) / ((std::size_t)(!(sizeof(x) % sizeof(0[x])))))
#else
# define lengthof(x) ((sizeof(x)/sizeof(0[x])) / ((size_t)(!(sizeof(x) % sizeof(0[x])))))
#endif
#endif