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Diffstat (limited to 'src/3rdparty/jasper/src/libjasper/include/jasper/jas_fix.h')
| -rw-r--r-- | src/3rdparty/jasper/src/libjasper/include/jasper/jas_fix.h | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/src/3rdparty/jasper/src/libjasper/include/jasper/jas_fix.h b/src/3rdparty/jasper/src/libjasper/include/jasper/jas_fix.h new file mode 100644 index 0000000..8081f20 --- /dev/null +++ b/src/3rdparty/jasper/src/libjasper/include/jasper/jas_fix.h @@ -0,0 +1,358 @@ +/* + * 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 JAS_FIX_H +#define JAS_FIX_H + +/******************************************************************************\ +* Includes. +\******************************************************************************/ + +#include <stdio.h> +#include <stdlib.h> +#include <math.h> + +#include <jasper/jas_config.h> +#include <jasper/jas_types.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/******************************************************************************\ +* Constants. +\******************************************************************************/ + +/* The representation of the value zero. */ +#define JAS_FIX_ZERO(fix_t, fracbits) \ + JAS_CAST(fix_t, 0) + +/* The representation of the value one. */ +#define JAS_FIX_ONE(fix_t, fracbits) \ + (JAS_CAST(fix_t, 1) << (fracbits)) + +/* The representation of the value one half. */ +#define JAS_FIX_HALF(fix_t, fracbits) \ + (JAS_CAST(fix_t, 1) << ((fracbits) - 1)) + +/******************************************************************************\ +* Conversion operations. +\******************************************************************************/ + +/* Convert an int to a fixed-point number. */ +#define JAS_INTTOFIX(fix_t, fracbits, x) \ + JAS_CAST(fix_t, (x) << (fracbits)) + +/* Convert a fixed-point number to an int. */ +#define JAS_FIXTOINT(fix_t, fracbits, x) \ + JAS_CAST(int, (x) >> (fracbits)) + +/* Convert a fixed-point number to a double. */ +#define JAS_FIXTODBL(fix_t, fracbits, x) \ + (JAS_CAST(double, x) / (JAS_CAST(fix_t, 1) << (fracbits))) + +/* Convert a double to a fixed-point number. */ +#define JAS_DBLTOFIX(fix_t, fracbits, x) \ + JAS_CAST(fix_t, ((x) * JAS_CAST(double, JAS_CAST(fix_t, 1) << (fracbits)))) + +/******************************************************************************\ +* Basic arithmetic operations. +* All other arithmetic operations are synthesized from these basic operations. +* There are three macros for each type of arithmetic operation. +* One macro always performs overflow/underflow checking, one never performs +* overflow/underflow checking, and one is generic with its behavior +* depending on compile-time flags. +* Only the generic macros should be invoked directly by application code. +\******************************************************************************/ + +/* Calculate the sum of two fixed-point numbers. */ +#if !defined(DEBUG_OVERFLOW) +#define JAS_FIX_ADD JAS_FIX_ADD_FAST +#else +#define JAS_FIX_ADD JAS_FIX_ADD_OFLOW +#endif + +/* Calculate the sum of two fixed-point numbers without overflow checking. */ +#define JAS_FIX_ADD_FAST(fix_t, fracbits, x, y) ((x) + (y)) + +/* Calculate the sum of two fixed-point numbers with overflow checking. */ +#define JAS_FIX_ADD_OFLOW(fix_t, fracbits, x, y) \ + ((x) >= 0) ? \ + (((y) >= 0) ? ((x) + (y) >= 0 || JAS_FIX_OFLOW(), (x) + (y)) : \ + ((x) + (y))) : \ + (((y) >= 0) ? ((x) + (y)) : ((x) + (y) < 0 || JAS_FIX_OFLOW(), \ + (x) + (y))) + +/* Calculate the product of two fixed-point numbers. */ +#if !defined(DEBUG_OVERFLOW) +#define JAS_FIX_MUL JAS_FIX_MUL_FAST +#else +#define JAS_FIX_MUL JAS_FIX_MUL_OFLOW +#endif + +/* Calculate the product of two fixed-point numbers without overflow + checking. */ +#define JAS_FIX_MUL_FAST(fix_t, fracbits, bigfix_t, x, y) \ + JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y)) >> \ + (fracbits)) + +/* Calculate the product of two fixed-point numbers with overflow + checking. */ +#define JAS_FIX_MUL_OFLOW(fix_t, fracbits, bigfix_t, x, y) \ + ((JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> (fracbits)) == \ + JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> \ + (fracbits))) ? \ + JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> \ + (fracbits))) : JAS_FIX_OFLOW()) + +/* Calculate the product of a fixed-point number and an int. */ +#if !defined(DEBUG_OVERFLOW) +#define JAS_FIX_MULBYINT JAS_FIX_MULBYINT_FAST +#else +#define JAS_FIX_MULBYINT JAS_FIX_MULBYINT_OFLOW +#endif + +/* Calculate the product of a fixed-point number and an int without overflow + checking. */ +#define JAS_FIX_MULBYINT_FAST(fix_t, fracbits, x, y) \ + JAS_CAST(fix_t, ((x) * (y))) + +/* Calculate the product of a fixed-point number and an int with overflow + checking. */ +#define JAS_FIX_MULBYINT_OFLOW(fix_t, fracbits, x, y) \ + JAS_FIX_MULBYINT_FAST(fix_t, fracbits, x, y) + +/* Calculate the quotient of two fixed-point numbers. */ +#if !defined(DEBUG_OVERFLOW) +#define JAS_FIX_DIV JAS_FIX_DIV_FAST +#else +#define JAS_FIX_DIV JAS_FIX_DIV_UFLOW +#endif + +/* Calculate the quotient of two fixed-point numbers without underflow + checking. */ +#define JAS_FIX_DIV_FAST(fix_t, fracbits, bigfix_t, x, y) \ + JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) << (fracbits)) / (y)) + +/* Calculate the quotient of two fixed-point numbers with underflow + checking. */ +#define JAS_FIX_DIV_UFLOW(fix_t, fracbits, bigfix_t, x, y) \ + JAS_FIX_DIV_FAST(fix_t, fracbits, bigfix_t, x, y) + +/* Negate a fixed-point number. */ +#if !defined(DEBUG_OVERFLOW) +#define JAS_FIX_NEG JAS_FIX_NEG_FAST +#else +#define JAS_FIX_NEG JAS_FIX_NEG_OFLOW +#endif + +/* Negate a fixed-point number without overflow checking. */ +#define JAS_FIX_NEG_FAST(fix_t, fracbits, x) \ + (-(x)) + +/* Negate a fixed-point number with overflow checking. */ +/* Yes, overflow is actually possible for two's complement representations, + although highly unlikely to occur. */ +#define JAS_FIX_NEG_OFLOW(fix_t, fracbits, x) \ + (((x) < 0) ? (-(x) > 0 || JAS_FIX_OFLOW(), -(x)) : (-(x))) + +/* Perform an arithmetic shift left of a fixed-point number. */ +#if !defined(DEBUG_OVERFLOW) +#define JAS_FIX_ASL JAS_FIX_ASL_FAST +#else +#define JAS_FIX_ASL JAS_FIX_ASL_OFLOW +#endif + +/* Perform an arithmetic shift left of a fixed-point number without overflow + checking. */ +#define JAS_FIX_ASL_FAST(fix_t, fracbits, x, n) \ + ((x) << (n)) + +/* Perform an arithmetic shift left of a fixed-point number with overflow + checking. */ +#define JAS_FIX_ASL_OFLOW(fix_t, fracbits, x, n) \ + ((((x) << (n)) >> (n)) == (x) || JAS_FIX_OFLOW(), (x) << (n)) + +/* Perform an arithmetic shift right of a fixed-point number. */ +#if !defined(DEBUG_OVERFLOW) +#define JAS_FIX_ASR JAS_FIX_ASR_FAST +#else +#define JAS_FIX_ASR JAS_FIX_ASR_UFLOW +#endif + +/* Perform an arithmetic shift right of a fixed-point number without underflow + checking. */ +#define JAS_FIX_ASR_FAST(fix_t, fracbits, x, n) \ + ((x) >> (n)) + +/* Perform an arithmetic shift right of a fixed-point number with underflow + checking. */ +#define JAS_FIX_ASR_UFLOW(fix_t, fracbits, x, n) \ + JAS_FIX_ASR_FAST(fix_t, fracbits, x, n) + +/******************************************************************************\ +* Other basic arithmetic operations. +\******************************************************************************/ + +/* Calculate the difference between two fixed-point numbers. */ +#define JAS_FIX_SUB(fix_t, fracbits, x, y) \ + JAS_FIX_ADD(fix_t, fracbits, x, JAS_FIX_NEG(fix_t, fracbits, y)) + +/* Add one fixed-point number to another. */ +#define JAS_FIX_PLUSEQ(fix_t, fracbits, x, y) \ + ((x) = JAS_FIX_ADD(fix_t, fracbits, x, y)) + +/* Subtract one fixed-point number from another. */ +#define JAS_FIX_MINUSEQ(fix_t, fracbits, x, y) \ + ((x) = JAS_FIX_SUB(fix_t, fracbits, x, y)) + +/* Multiply one fixed-point number by another. */ +#define JAS_FIX_MULEQ(fix_t, fracbits, bigfix_t, x, y) \ + ((x) = JAS_FIX_MUL(fix_t, fracbits, bigfix_t, x, y)) + +/******************************************************************************\ +* Miscellaneous operations. +\******************************************************************************/ + +/* Calculate the absolute value of a fixed-point number. */ +#define JAS_FIX_ABS(fix_t, fracbits, x) \ + (((x) >= 0) ? (x) : (JAS_FIX_NEG(fix_t, fracbits, x))) + +/* Is a fixed-point number an integer? */ +#define JAS_FIX_ISINT(fix_t, fracbits, x) \ + (JAS_FIX_FLOOR(fix_t, fracbits, x) == (x)) + +/* Get the sign of a fixed-point number. */ +#define JAS_FIX_SGN(fix_t, fracbits, x) \ + ((x) >= 0 ? 1 : (-1)) + +/******************************************************************************\ +* Relational operations. +\******************************************************************************/ + +/* Compare two fixed-point numbers. */ +#define JAS_FIX_CMP(fix_t, fracbits, x, y) \ + ((x) > (y) ? 1 : (((x) == (y)) ? 0 : (-1))) + +/* Less than. */ +#define JAS_FIX_LT(fix_t, fracbits, x, y) \ + ((x) < (y)) + +/* Less than or equal. */ +#define JAS_FIX_LTE(fix_t, fracbits, x, y) \ + ((x) <= (y)) + +/* Greater than. */ +#define JAS_FIX_GT(fix_t, fracbits, x, y) \ + ((x) > (y)) + +/* Greater than or equal. */ +#define JAS_FIX_GTE(fix_t, fracbits, x, y) \ + ((x) >= (y)) + +/******************************************************************************\ +* Rounding functions. +\******************************************************************************/ + +/* Round a fixed-point number to the nearest integer. */ +#define JAS_FIX_ROUND(fix_t, fracbits, x) \ + (((x) < 0) ? JAS_FIX_FLOOR(fix_t, fracbits, JAS_FIX_ADD(fix_t, fracbits, \ + (x), JAS_FIX_HALF(fix_t, fracbits))) : \ + JAS_FIX_NEG(fix_t, fracbits, JAS_FIX_FLOOR(fix_t, fracbits, \ + JAS_FIX_ADD(fix_t, fracbits, (-(x)), JAS_FIX_HALF(fix_t, fracbits))))) + +/* Round a fixed-point number to the nearest integer in the direction of + negative infinity (i.e., the floor function). */ +#define JAS_FIX_FLOOR(fix_t, fracbits, x) \ + ((x) & (~((JAS_CAST(fix_t, 1) << (fracbits)) - 1))) + +/* Round a fixed-point number to the nearest integer in the direction + of zero. */ +#define JAS_FIX_TRUNC(fix_t, fracbits, x) \ + (((x) >= 0) ? JAS_FIX_FLOOR(fix_t, fracbits, x) : \ + JAS_FIX_CEIL(fix_t, fracbits, x)) + +/******************************************************************************\ +* The below macros are for internal library use only. Do not invoke them +* directly in application code. +\******************************************************************************/ + +/* Handle overflow. */ +#define JAS_FIX_OFLOW() \ + jas_eprintf("overflow error: file %s, line %d\n", __FILE__, __LINE__) + +/* Handle underflow. */ +#define JAS_FIX_UFLOW() \ + jas_eprintf("underflow error: file %s, line %d\n", __FILE__, __LINE__) + +#ifdef __cplusplus +} +#endif + +#endif |