1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2009 Intel Corporation; author H. Peter Anvin
4 *
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use,
9 * copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following
12 * conditions:
13 *
14 * The above copyright notice and this permission notice shall
15 * be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * ----------------------------------------------------------------------- */
27
28 #ifndef _SYSLINUX_ALIGN_H
29 #define _SYSLINUX_ALIGN_H
30
31 #include <stdint.h>
32
__align_down(uintptr_t __p,uintptr_t __a)33 static inline uintptr_t __align_down(uintptr_t __p, uintptr_t __a)
34 {
35 return __p & ~(__a - 1);
36 }
37
__align_up(uintptr_t __p,uintptr_t __a)38 static inline uintptr_t __align_up(uintptr_t __p, uintptr_t __a)
39 {
40 return (__p + __a - 1) & ~(__a - 1);
41 }
42
43 #define ALIGN_UP(p,a) ((__typeof__(p))__align_up((uintptr_t)(p), (a)))
44 #define ALIGN_DOWN(p,a) ((__typeof__(p))__align_down((uintptr_t)(p), (a)))
45 #define ALIGN_UP_FOR(p,t) ALIGN_UP(p,sizeof(t))
46 #define ALIGN_DOWN_FOR(p,t) ALIGN_DOWN(p,sizeof(t))
47
48 #endif /* _SYSLINUX_ALIGN_H */
49