math.h
Go to the documentation of this file.
1 /*
2  * SPDX-FileCopyrightText: 2022 ML!PA Consulting GmbH
3  * SPDX-License-Identifier: LGPL-2.1-only
4  */
5 
6 #pragma once
7 
18 #ifdef __cplusplus
19 extern "C" {
20 #endif
21 
25 #define SIGNOF(a) _Generic(a, unsigned char: 1, \
26  unsigned short: 1, \
27  unsigned int: 1, \
28  unsigned long: 1, \
29  unsigned long long: 1, \
30  default: ((a) <= 0 ? ((a) == 0 ? 1L : -1L ): 1L))
34 #define DIV_ROUND(a, b) ((SIGNOF(a) * ((SIGNOF(a) * (a)) + (SIGNOF(b) * (b)) / 2) / (b)))
35 
39 #define DIV_ROUND_UP(a, b) ((SIGNOF(a)>0 && SIGNOF(b)>0) ? (((a) + (b) - 1) / (b)):\
40  (SIGNOF(a)<0 && SIGNOF(b)<0) ? (((a) + (b) + 1) / (b)): (a) / (b))
41 
45 #define DIV_ROUND_INF(a, b) (SIGNOF(a) * (((SIGNOF(a) * (a)) + (SIGNOF(b) * (b)) - 1) / (b)))
46 
50 #define MATH_ALIGN(num, chunk) ((chunk) * DIV_ROUND_INF(num, chunk))
51 
52 #ifdef __cplusplus
53 }
54 #endif
55