/* * Copyright (c) 1999-2000 Image Power, Inc. and the University of *   British Columbia. * Copyright (c) 2001-2002 Michael David Adams. * All rights reserved. */ /* __START_OF_JASPER_LICENSE__ *  * JasPer License Version 2.0 *  * Copyright (c) 2001-2006 Michael David Adams * Copyright (c) 1999-2000 Image Power, Inc. * Copyright (c) 1999-2000 The University of British Columbia *  * All rights reserved. *  * Permission is hereby granted, free of charge, to any person (the * "User") obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, * publish, distribute, and/or sell copies of the Software, and to permit * persons to whom the Software is furnished to do so, subject to the * following conditions: *  * 1.  The above copyright notices and this permission notice (which * includes the disclaimer below) shall be included in all copies or * substantial portions of the Software. *  * 2.  The name of a copyright holder shall not be used to endorse or * promote products derived from the Software without specific prior * written permission. *  * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY. * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES, * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH, * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. *  * __END_OF_JASPER_LICENSE__ */ /* * Fixed-Point Number Class * * $Id$ */ #ifndef JPC_FIX_H#define JPC_FIX_H /******************************************************************************\* Includes.\******************************************************************************/ #include "jasper/jas_config.h"#include "jasper/jas_types.h"#include "jasper/jas_fix.h"#include "jasper/jas_math.h" /******************************************************************************\* Basic parameters of the fixed-point type.\******************************************************************************/ /*jpc_fix_t.The integral type used to represent a fixed-point number.  Thistype must be capable of representing values from -(2^31) to 2^31-1(inclusive). jpc_fix_big_t.The integral type used to respresent higher-precision intermediate results.This type should be capable of representing values from -(2^63) to 2^63-1(inclusive). JPC_FIX_FRACBITS.The number of bits used for the fractional part of a fixed-point number.*/ typedef jas_fix_t jpc_fix_t;typedef jas_fix_big_t jpc_fix_big_t; #if defined(JAS_ENABLE_32BIT)#define JPC_FIX_FRACBITS	13#else#define JPC_FIX_FRACBITS	18#endif /******************************************************************************\* Instantiations of the generic fixed-point number macros for the* parameters given above.  (Too bad C does not support templates, eh?)* The purpose of these macros is self-evident if one examines the* corresponding macros in the jasper/jas_fix.h header file.\******************************************************************************/ #define	JPC_FIX_ZERO	JAS_FIX_ZERO(jpc_fix_t, JPC_FIX_FRACBITS)#define	JPC_FIX_ONE		JAS_FIX_ONE(jpc_fix_t, JPC_FIX_FRACBITS)#define	JPC_FIX_HALF	JAS_FIX_HALF(jpc_fix_t, JPC_FIX_FRACBITS) JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_inttofix(int x){	return JAS_INTTOFIX(jpc_fix_t, JPC_FIX_FRACBITS, x);} JAS_ATTRIBUTE_CONSTstatic inline int jpc_fixtoint(jpc_fix_t x){	return JAS_FIXTOINT(jpc_fix_t, JPC_FIX_FRACBITS, x);} JAS_ATTRIBUTE_CONSTstatic inline double jpc_fixtodbl(jpc_fix_t x){	return JAS_FIXTODBL(jpc_fix_t, JPC_FIX_FRACBITS, x);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_dbltofix(double x){	return JAS_DBLTOFIX(jpc_fix_t, JPC_FIX_FRACBITS, x);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_add(jpc_fix_t x, jpc_fix_t y){	return JAS_FIX_ADD(jpc_fix_t, JPC_FIX_FRACBITS, x, y);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_sub(jpc_fix_t x, jpc_fix_t y){	return JAS_FIX_SUB(jpc_fix_t, JPC_FIX_FRACBITS, x, y);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_mul(jpc_fix_big_t x, jpc_fix_big_t y){	return JAS_FIX_MUL(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_big_t jpc_fix_mulbyint(jpc_fix_big_t x, int y){	return JAS_FIX_MUL(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_div(jpc_fix_big_t x, jpc_fix_t y){	return JAS_FIX_DIV(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_neg(jpc_fix_t x){	return JAS_FIX_NEG(jpc_fix_t, JPC_FIX_FRACBITS, x);} //#define	jpc_fix_asl(x, n)	JAS_FIX_ASL(jpc_fix_t, JPC_FIX_FRACBITS, x, n)//#define	jpc_fix_asr(x, n)	JAS_FIX_ASR(jpc_fix_t, JPC_FIX_FRACBITS, x, n) #if 0#ifdef JAS_ENABLE_32BIT#define jpc_fix_asl jas_least32_asl#define jpc_fix_asr jas_least32_asr#else#define jpc_fix_asl jas_fast32_asl#define jpc_fix_asr jas_fast32_asr#endif#endif#define jpc_fix_asl jas_fix_asl#define jpc_fix_asr jas_fix_asr #define jpc_fix_pluseq(x, y) \	JAS_FIX_PLUSEQ(jpc_fix_t, JPC_FIX_FRACBITS, x, y)#define jpc_fix_minuseq(x, y) \	JAS_FIX_MINUSEQ(jpc_fix_t, JPC_FIX_FRACBITS, x, y)#define	jpc_fix_muleq(x, y)	\	JAS_FIX_MULEQ(jpc_fix_t, JPC_FIX_FRACBITS, jpc_fix_big_t, x, y) JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_abs(jpc_fix_t x){	return JAS_FIX_ABS(jpc_fix_t, JPC_FIX_FRACBITS, x);} JAS_ATTRIBUTE_CONSTstatic inline bool jpc_fix_isint(jpc_fix_t x){	return JAS_FIX_ISINT(jpc_fix_t, JPC_FIX_FRACBITS, x);} JAS_ATTRIBUTE_CONSTstatic inline int jpc_fix_sgn(jpc_fix_t x){	return JAS_FIX_SGN(jpc_fix_t, JPC_FIX_FRACBITS, x);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_round(jpc_fix_t x){	return JAS_FIX_ROUND(jpc_fix_t, JPC_FIX_FRACBITS, x);} JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_floor(jpc_fix_t x){	return JAS_FIX_FLOOR(jpc_fix_t, JPC_FIX_FRACBITS, x);} /******************************************************************************\* Extra macros for convenience.\******************************************************************************/ /* Compute the sum of three fixed-point numbers. */JAS_ATTRIBUTE_CONSTstatic inline jpc_fix_t jpc_fix_add3(jpc_fix_t x, jpc_fix_t y, jpc_fix_t z){	return jpc_fix_add(jpc_fix_add(x, y), z);} #endif