| Deepa Dinamani | 39112ac | 2012-12-20 11:32:05 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2012, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * Redistribution and use in source and binary forms, with or without |
| 4 | * modification, are permitted provided that the following conditions are |
| 5 | * met: |
| 6 | * * Redistributions of source code must retain the above copyright |
| 7 | * notice, this list of conditions and the following disclaimer. |
| 8 | * * Redistributions in binary form must reproduce the above |
| 9 | * copyright notice, this list of conditions and the following |
| 10 | * disclaimer in the documentation and/or other materials provided |
| 11 | * with the distribution. |
| 12 | * * Neither the name of The Linux Foundation nor the names of its |
| 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 23 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 25 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 26 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | static void swap(unsigned *x, unsigned *y) |
| 30 | { |
| 31 | unsigned temp; |
| 32 | |
| 33 | temp = *x; |
| 34 | *x = *y; |
| 35 | *y = temp; |
| 36 | } |
| 37 | |
| 38 | /* Function to calculate gcd of two positive numbers. */ |
| 39 | unsigned gcd(unsigned m, unsigned n) |
| 40 | { |
| 41 | unsigned x; |
| 42 | |
| 43 | if (m < n) |
| 44 | swap(&m, &n); |
| 45 | |
| 46 | while (n != 0) |
| 47 | { |
| 48 | x = m % n; |
| 49 | m = n; |
| 50 | n = x; |
| 51 | } |
| 52 | |
| 53 | return m; |
| 54 | } |
| 55 | |
| 56 | /* Function to calculate lcm of two positive numbers. */ |
| 57 | unsigned lcm(unsigned m, unsigned n) |
| 58 | { |
| 59 | unsigned lcm; |
| 60 | |
| 61 | lcm = (m * n) / gcd(m, n); |
| 62 | |
| 63 | return lcm; |
| 64 | } |