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math.h
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1/*
2 * Copyright (C) 2022 ML!PA Consulting GmbH
3 *
4 * This file is subject to the terms and conditions of the GNU Lesser
5 * General Public License v2.1. See the file LICENSE in the top level
6 * directory for more details.
7 */
8
19#ifndef MACROS_MATH_H
20#define MACROS_MATH_H
21
22#ifdef __cplusplus
23extern "C" {
24#endif
25
29#define SIGNOF(a) _Generic(a, unsigned char: 1, \
30 unsigned short: 1, \
31 unsigned int: 1, \
32 unsigned long: 1, \
33 unsigned long long: 1, \
34 default: ((a) <= 0 ? ((a) == 0 ? 1L : -1L ): 1L))
38#define DIV_ROUND(a, b) ((SIGNOF(a) * ((SIGNOF(a) * (a)) + (SIGNOF(b) * (b)) / 2) / (b)))
39
43#define DIV_ROUND_UP(a, b) ((SIGNOF(a)>0 && SIGNOF(b)>0) ? (((a) + (b) - 1) / (b)):\
44 (SIGNOF(a)<0 && SIGNOF(b)<0) ? (((a) + (b) + 1) / (b)): (a) / (b))
45
49#define DIV_ROUND_INF(a, b) (SIGNOF(a) * (((SIGNOF(a) * (a)) + (SIGNOF(b) * (b)) - 1) / (b)))
50
54#define MATH_ALIGN(num, chunk) ((chunk) * DIV_ROUND_INF(num, chunk))
55
56#ifdef __cplusplus
57}
58#endif
59
60#endif /* MACROS_MATH_H */