1 /* 2 * Some simple utility functions. 3 * 4 * Copyright (C) 2018 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software: you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation, either version 3 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #ifndef __UTILS_H__ 21 #define __UTILS_H__ 22 23 #include <stdint.h> 24 25 #define abs(x) ((x) < 0 ? -(x) : (x)) 26 #define max(x, y) ((x) > (y) ? (x) : (y)) 27 #define min(x, y) ((x) < (y) ? (x) : (y)) 28 29 void wait(uint32_t delay); 30 31 uint8_t *wrap_pointer(uint8_t *ptr, uint8_t *lower, uint8_t *upper); 32 33 int wrap_value(int value, int limit); 34 35 #endif /* __UTILS_H__ */