1 /* 2 * Copyright (c) 2014, STMicroelectronics International N.V. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #ifndef UTIL_H 28 #define UTIL_H 29 30 #ifndef MAX 31 #define MAX(a, b) \ 32 (__extension__({ __typeof__(a) _a = (a); \ 33 __typeof__(b) _b = (b); \ 34 _a > _b ? _a : _b; })) 35 36 #define MIN(a, b) \ 37 (__extension__({ __typeof__(a) _a = (a); \ 38 __typeof__(b) _b = (b); \ 39 _a < _b ? _a : _b; })) 40 #endif 41 42 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 43 44 /* Round up the even multiple of size, size has to be a multiple of 2 */ 45 #define ROUNDUP(v, size) (((v) + ((size) - 1)) & ~((size) - 1)) 46 47 /* Round down the even multiple of size, size has to be a multiple of 2 */ 48 #define ROUNDDOWN(v, size) ((v) & ~((size) - 1)) 49 50 /* x has to be of an unsigned type */ 51 #define IS_POWER_OF_TWO(x) (((x) != 0) && (((x) & (~(x) + 1)) == (x))) 52 53 #define TO_STR(x) _TO_STR(x) 54 #define _TO_STR(x) #x 55 56 #endif /*UTIL_H*/ 57