/src/jasper/src/libjasper/jpc/jpc_fix.h

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/*
 * 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.
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 */

/*
 * 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.  This
type 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_CONST
static inline jpc_fix_t jpc_inttofix(int x)
{
  return JAS_INTTOFIX(jpc_fix_t, JPC_FIX_FRACBITS, x);
}

JAS_ATTRIBUTE_CONST
static inline int jpc_fixtoint(jpc_fix_t x)
{
  return JAS_FIXTOINT(jpc_fix_t, JPC_FIX_FRACBITS, x);
}

JAS_ATTRIBUTE_CONST
static inline double jpc_fixtodbl(jpc_fix_t x)
{
  return JAS_FIXTODBL(jpc_fix_t, JPC_FIX_FRACBITS, x);
}

JAS_ATTRIBUTE_CONST
static inline jpc_fix_t jpc_dbltofix(double x)
{
  return JAS_DBLTOFIX(jpc_fix_t, JPC_FIX_FRACBITS, x);
}

JAS_ATTRIBUTE_CONST
static 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_CONST
static 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_CONST
static 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_CONST
static 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_CONST
static 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_CONST
static 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_CONST
static inline jpc_fix_t jpc_fix_abs(jpc_fix_t x)
{
  return JAS_FIX_ABS(jpc_fix_t, JPC_FIX_FRACBITS, x);
}

JAS_ATTRIBUTE_CONST
static inline bool jpc_fix_isint(jpc_fix_t x)
{
  return JAS_FIX_ISINT(jpc_fix_t, JPC_FIX_FRACBITS, x);
}

JAS_ATTRIBUTE_CONST
static inline int jpc_fix_sgn(jpc_fix_t x)
{
  return JAS_FIX_SGN(jpc_fix_t, JPC_FIX_FRACBITS, x);
}

JAS_ATTRIBUTE_CONST
static inline jpc_fix_t jpc_fix_round(jpc_fix_t x)
{
  return JAS_FIX_ROUND(jpc_fix_t, JPC_FIX_FRACBITS, x);
}

JAS_ATTRIBUTE_CONST
static 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_CONST
static 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

Coverage Report

Created: 2025-11-16 07:22