1/* 2 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium 3 * Copyright (c) 2002-2007, Professor Benoit Macq 4 * Copyright (c) 2001-2003, David Janssens 5 * Copyright (c) 2002-2003, Yannick Verschueren 6 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe 7 * Copyright (c) 2005, Herve Drolon, FreeImage Team 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31#ifndef __FIX_H 32#define __FIX_H 33 34#if defined(_MSC_VER) || defined(__BORLANDC__) 35#define int64 __int64 36#else 37#define int64 long long 38#endif 39 40/** 41@file fix.h 42@brief Implementation of operations of specific multiplication (FIX) 43 44The functions in FIX.H have for goal to realize specific multiplication. 45*/ 46 47/** @defgroup FIX FIX - Implementation of operations of specific multiplication */ 48/*@{*/ 49 50/** 51Multiply two fixed-precision rational numbers. 52@param a 53@param b 54@return Returns a * b 55*/ 56static INLINE int fix_mul(int a, int b) { 57 int64 temp = (int64) a * (int64) b ; 58 temp += temp & 4096; 59 return (int) (temp >> 13) ; 60} 61 62/*@}*/ 63 64#endif /* __FIX_H */ 65