00001 /* 00002 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium 00003 * Copyright (c) 2002-2007, Professor Benoit Macq 00004 * Copyright (c) 2001-2003, David Janssens 00005 * Copyright (c) 2002-2003, Yannick Verschueren 00006 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe 00007 * Copyright (c) 2005, Herve Drolon, FreeImage Team 00008 * All rights reserved. 00009 * 00010 * Redistribution and use in source and binary forms, with or without 00011 * modification, are permitted provided that the following conditions 00012 * are met: 00013 * 1. Redistributions of source code must retain the above copyright 00014 * notice, this list of conditions and the following disclaimer. 00015 * 2. Redistributions in binary form must reproduce the above copyright 00016 * notice, this list of conditions and the following disclaimer in the 00017 * documentation and/or other materials provided with the distribution. 00018 * 00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' 00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00022 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00023 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00024 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00025 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00026 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00027 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00029 * POSSIBILITY OF SUCH DAMAGE. 00030 */ 00031 #ifndef __INT_H 00032 #define __INT_H 00033 00042 00045 /* ----------------------------------------------------------------------- */ 00050 static INLINE int int_min(int a, int b) { 00051 return a < b ? a : b; 00052 } 00057 static INLINE int int_max(int a, int b) { 00058 return (a > b) ? a : b; 00059 } 00069 static INLINE int int_clamp(int a, int min, int max) { 00070 if (a < min) 00071 return min; 00072 if (a > max) 00073 return max; 00074 return a; 00075 } 00079 static INLINE int int_abs(int a) { 00080 return a < 0 ? -a : a; 00081 } 00086 static INLINE int int_ceildiv(int a, int b) { 00087 return (a + b - 1) / b; 00088 } 00093 static INLINE int int_ceildivpow2(int a, int b) { 00094 return (a + (1 << b) - 1) >> b; 00095 } 00100 static INLINE int int_floordivpow2(int a, int b) { 00101 return a >> b; 00102 } 00107 static INLINE int int_floorlog2(int a) { 00108 int l; 00109 for (l = 0; a > 1; l++) { 00110 a >>= 1; 00111 } 00112 return l; 00113 } 00114 /* ----------------------------------------------------------------------- */ 00118 00119 #endif