/*
 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
 * Copyright (c) 2002-2007, Professor Benoit Macq
 * Copyright (c) 2001-2003, David Janssens
 * Copyright (c) 2002-2003, Yannick Verschueren
 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
 * Copyright (c) 2005, Herve Drolon, FreeImage Team
 * Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef __INT_H
#define __INT_H
/**
@file int.h
@brief Implementation of operations on integers (INT)

The functions in INT.H have for goal to realize operations on integers.
*/
#include "openjpeg.h"
#include "opj_includes.h"
/** @defgroup INT INT - Implementation of operations on integers */
/*@{*/

/** @name Exported functions (see also openjpeg.h) */
/*@{*/
/* ----------------------------------------------------------------------- */
/**
Get the minimum of two integers
@return Returns a if a < b else b
*/
static INLINE OPJ_INT32 int_min(OPJ_INT32 a, OPJ_INT32 b) {
  return a < b ? a : b;
}

/**
Get the minimum of two integers
@return Returns a if a < b else b
*/
static INLINE OPJ_UINT32 uint_min(OPJ_UINT32 a, OPJ_UINT32 b) {
  return a < b ? a : b;
}

/**
Get the maximum of two integers
@return Returns a if a > b else b
*/
static INLINE OPJ_INT32 int_max(OPJ_INT32  a, OPJ_INT32  b) {
  return (a > b) ? a : b;
}

/**
Get the maximum of two integers
@return Returns a if a > b else b
*/
static INLINE OPJ_UINT32 uint_max(OPJ_UINT32  a, OPJ_UINT32  b) {
  return (a > b) ? a : b;
}
/**
Clamp an integer inside an interval
@return
<ul>
<li>Returns a if (min < a < max)
<li>Returns max if (a > max)
<li>Returns min if (a < min)
</ul>
*/
static INLINE OPJ_INT32  int_clamp(OPJ_INT32  a, OPJ_INT32  min, OPJ_INT32  max) {
  if (a < min)
    return min;
  if (a > max)
    return max;
  return a;
}
/**
@return Get absolute value of integer
*/
static INLINE OPJ_INT32  int_abs(OPJ_INT32  a) {
  return a < 0 ? -a : a;
}
/**
Divide an integer and round upwards
@return Returns a divided by b
*/
static INLINE OPJ_INT32  int_ceildiv(OPJ_INT32  a, OPJ_INT32  b) {
  return (a + b - 1) / b;
}

/**
Divide an integer and round upwards
@return Returns a divided by b
*/
static INLINE OPJ_UINT32  uint_ceildiv(OPJ_UINT32  a, OPJ_UINT32  b) {
  return (a + b - 1) / b;
}
/**
Divide an integer by a power of 2 and round upwards
@return Returns a divided by 2^b
*/
static INLINE OPJ_INT32  int_ceildivpow2(OPJ_INT32  a, OPJ_INT32  b) {
  return (a + (1 << b) - 1) >> b;
}
/**
Divide an integer by a power of 2 and round downwards
@return Returns a divided by 2^b
*/
static INLINE OPJ_INT32  int_floordivpow2(OPJ_INT32  a, OPJ_INT32  b) {
  return a >> b;
}
/**
Get logarithm of an integer and round downwards
@return Returns log2(a)
*/
static INLINE OPJ_INT32  int_floorlog2(OPJ_INT32  a) {
  OPJ_INT32  l;
  for (l = 0; a > 1; l++) {
    a >>= 1;
  }
  return l;
}

/**
Get logarithm of an integer and round downwards
@return Returns log2(a)
*/
static INLINE OPJ_UINT32  uint_floorlog2(OPJ_UINT32  a) {
  OPJ_UINT32  l;
  for (l = 0; a > 1; ++l)
  {
    a >>= 1;
  }
  return l;
}
/* ----------------------------------------------------------------------- */
/*@}*/

/*@}*/

#endif
