math.c
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上传日期:2022-07-16
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文件大小:3k
- /* ----------------------------------------------------------------------------
- * ATMEL Microcontroller Software Support
- * ----------------------------------------------------------------------------
- * Copyright (c) 2008, Atmel Corporation
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * - Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the disclaimer below.
- *
- * Atmel's name may not be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
- * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ----------------------------------------------------------------------------
- */
- //------------------------------------------------------------------------------
- // Headers
- //------------------------------------------------------------------------------
- #include "math.h"
- #include "trace.h"
- //------------------------------------------------------------------------------
- // Exported functions
- //------------------------------------------------------------------------------
- //------------------------------------------------------------------------------
- /// Returns the minimum value between two integers.
- /// param a First integer to compare.
- /// param b Second integer to compare.
- //------------------------------------------------------------------------------
- unsigned int min(unsigned int a, unsigned int b)
- {
- if (a < b) {
- return a;
- }
- else {
- return b;
- }
- }
- //------------------------------------------------------------------------------
- /// Returns the absolute value of an integer.
- /// param value Integer value.
- //------------------------------------------------------------------------------
- // Do not call this function "abs", problem with gcc !
- unsigned int absv(signed int value)
- {
- if (value < 0) {
- return -value;
- }
- else {
- return value;
- }
- }
- //------------------------------------------------------------------------------
- /// Computes and returns x power of y.
- /// param x Value.
- /// param y Power.
- //------------------------------------------------------------------------------
- unsigned int power(unsigned int x, unsigned int y)
- {
- unsigned int result = 1;
-
- while (y > 0) {
- result *= x;
- y--;
- }
- return result;
- }