| [86d05fae] | 1 | /*
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| [df4ed85] | 2 | * Copyright (c) 2005 Jakub Jermar
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| [86d05fae] | 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| [fadd381] | 29 | /** @addtogroup libc
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| [b2951e2] | 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| [fadd381] | 35 | #ifndef LIBC_ALIGN_H_
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| 36 | #define LIBC_ALIGN_H_
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| [86d05fae] | 37 |
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| 38 | /** Align to the nearest lower address.
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| 39 | *
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| 40 | * @param s Address or size to be aligned.
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| 41 | * @param a Size of alignment, must be power of 2.
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| 42 | */
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| 43 | #define ALIGN_DOWN(s, a) ((s) & ~((a) - 1))
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| 44 |
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| 45 |
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| 46 | /** Align to the nearest higher address.
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| 47 | *
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| 48 | * @param s Address or size to be aligned.
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| 49 | * @param a Size of alignment, must be power of 2.
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| 50 | */
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| [bf9afa07] | 51 | #define ALIGN_UP(s, a) ((long)((s) + ((a) - 1)) & ~((long) (a) - 1))
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| [86d05fae] | 52 |
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| 53 | #endif
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| [b2951e2] | 54 |
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| [fadd381] | 55 | /** @}
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| [b2951e2] | 56 | */
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