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