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d6e6a27d MWO |
1 | #ifndef _TOOLS_MATH_H |
2 | #define _TOOLS_MATH_H | |
3 | ||
4 | /* | |
5 | * This looks more complex than it should be. But we need to | |
6 | * get the type for the ~ right in round_down (it needs to be | |
7 | * as wide as the result!), and we want to evaluate the macro | |
8 | * arguments just once each. | |
9 | */ | |
10 | #define __round_mask(x, y) ((__typeof__(x))((y)-1)) | |
11 | #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) | |
12 | #define round_down(x, y) ((x) & ~__round_mask(x, y)) | |
13 | ||
14 | #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) | |
15 | ||
16 | #ifndef roundup | |
17 | #define roundup(x, y) ( \ | |
18 | { \ | |
19 | const typeof(y) __y = y; \ | |
20 | (((x) + (__y - 1)) / __y) * __y; \ | |
21 | } \ | |
22 | ) | |
23 | #endif | |
24 | ||
25 | #endif |