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| Rev | Author | Line No. | Line |
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| 1125 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
| 1125 | jermar | 3 | * All rights reserved. |
| 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 | |||
| 1866 | jermar | 29 | /** @addtogroup libc |
| 1653 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 1866 | jermar | 35 | #ifndef LIBC_ALIGN_H_ |
| 36 | #define LIBC_ALIGN_H_ |
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| 1125 | jermar | 37 | |
| 3498 | jermar | 38 | /** Align to the nearest lower address which is a power of two. |
| 1125 | jermar | 39 | * |
| 3498 | jermar | 40 | * @param s Address or size to be aligned. |
| 41 | * @param a Size of alignment, must be power of 2. |
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| 1125 | jermar | 42 | */ |
| 43 | #define ALIGN_DOWN(s, a) ((s) & ~((a) - 1)) |
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| 44 | |||
| 45 | |||
| 3498 | jermar | 46 | /** Align to the nearest higher address which is a power of two. |
| 1125 | jermar | 47 | * |
| 3498 | jermar | 48 | * @param s Address or size to be aligned. |
| 49 | * @param a Size of alignment, must be power of 2. |
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| 1125 | jermar | 50 | */ |
| 1501 | palkovsky | 51 | #define ALIGN_UP(s, a) ((long)((s) + ((a) - 1)) & ~((long) (a) - 1)) |
| 1125 | jermar | 52 | |
| 3498 | jermar | 53 | /** Round up to the nearest higher boundary. |
| 54 | * |
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| 55 | * @param n Number to be aligned. |
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| 56 | * @param b Boundary, arbitrary unsigned number. |
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| 57 | */ |
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| 58 | #define ROUND_UP(n, b) (((n) / (b) + ((n) % (b) != 0)) * (b)) |
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| 59 | |||
| 1125 | jermar | 60 | #endif |
| 1653 | cejka | 61 | |
| 1866 | jermar | 62 | /** @} |
| 1653 | cejka | 63 | */ |