706 lines
21 KiB
C++
706 lines
21 KiB
C++
// ____ ______ __
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// / __ \ / ____// /
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// / /_/ // / / /
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// / ____// /___ / /___ PixInsight Class Library
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// /_/ \____//_____/ PCL 2.4.23
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// ----------------------------------------------------------------------------
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// pcl/Utility.h - Released 2022-03-12T18:59:29Z
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// ----------------------------------------------------------------------------
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// This file is part of the PixInsight Class Library (PCL).
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// PCL is a multiplatform C++ framework for development of PixInsight modules.
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//
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// Copyright (c) 2003-2022 Pleiades Astrophoto S.L. All Rights Reserved.
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//
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// Redistribution and use in both source and binary forms, with or without
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// modification, is permitted provided that the following conditions are met:
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//
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// 1. All redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. All redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the names "PixInsight" and "Pleiades Astrophoto", nor the names
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// of their contributors, may be used to endorse or promote products derived
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// from this software without specific prior written permission. For written
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// permission, please contact info@pixinsight.com.
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//
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// 4. All products derived from this software, in any form whatsoever, must
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// reproduce the following acknowledgment in the end-user documentation
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// and/or other materials provided with the product:
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//
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// "This product is based on software from the PixInsight project, developed
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// by Pleiades Astrophoto and its contributors (https://pixinsight.com/)."
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//
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// Alternatively, if that is where third-party acknowledgments normally
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// appear, this acknowledgment must be reproduced in the product itself.
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//
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// THIS SOFTWARE IS PROVIDED BY PLEIADES ASTROPHOTO AND ITS CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PLEIADES ASTROPHOTO OR ITS
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, BUSINESS
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// INTERRUPTION; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; AND LOSS OF USE,
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// DATA OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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// ----------------------------------------------------------------------------
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#ifndef __PCL_Utility_h
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#define __PCL_Utility_h
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/// \file pcl/Utility.h
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#include <pcl/Defs.h>
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#include <pcl/Diagnostics.h>
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#include <pcl/Association.h>
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namespace pcl
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{
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// ----------------------------------------------------------------------------
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/*!
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* \defgroup utility_algorithms Utility Algorithms
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*
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* Template formal parameters:
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*
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* FI Forward iterator \n
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* BI Bidirectional iterator \n
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* RI Random access iterator \n
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* UP Unary predicate \n
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* BP Binary predicate \n
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* T Item type \n
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* F Function
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*/
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// ----------------------------------------------------------------------------
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/*!
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* Returns a reference to the smaller of two objects \a a and \a b. Returns
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* \a b if b < a. Returns \a a if a <= b.
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*
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* \ingroup utility_algorithms
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*/
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template <typename T> inline constexpr
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const T& Min( const T& a, const T& b ) noexcept
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{
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return (b < a) ? b : a;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns a reference to the smallest of two objects \a a and \a b, as
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* specified by the binary predicate \a p. Returns \a b if p(b,a) is true;
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* returns \a a otherwise.
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*
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* \ingroup utility_algorithms
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*/
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template <typename T, class BP> inline
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const T& Min( const T& a, const T& b, BP p ) noexcept( noexcept( p ) )
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{
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return p( b, a ) ? b : a;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns a reference to the largest of two objects \a a and \a b. Returns
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* \a b if a < b. Returns \a a if b <= a.
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*
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* \ingroup utility_algorithms
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*/
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template <typename T> inline constexpr
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const T& Max( const T& a, const T& b ) noexcept
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{
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return (a < b) ? b : a;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns a reference to the largest of two objects \a a and \a b, as
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* specified by the binary predicate \a p. Returns \a b if p(a,b) is true;
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* returns \a a otherwise.
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*
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* \ingroup utility_algorithms
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*/
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template <typename T, class BP> inline
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const T& Max( const T& a, const T& b, BP p ) noexcept( noexcept( p ) )
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{
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return p( a, b ) ? b : a;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns a reference to the median of three objects \a a, \a b and \a c:
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*
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* \li \a a if (c <= a < b) || (b <= a < c)
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* \li \a b if (a < b < c) || (c <= b <= a)
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* \li \a c if (a < c < b) || (b < c <= a)
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*
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* \ingroup utility_algorithms
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*/
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template <typename T> inline constexpr
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const T& Median( const T& a, const T& b, const T& c ) noexcept
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{
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return (a < b) ? ((b < c) ? b : ((a < c) ? c : a)) :
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((a < c) ? a : ((b < c) ? c : b));
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns a reference to the median of three objects \a a, \a b and \a c, as
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* specified by the binary predicate \a p:
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*
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* \li \a a if p(a,b) && !p(b,c) && !p(a,c) || !p(a,b) && p(a,c)
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* \li \a b if p(a,b) && p(b,c) || !p(a,b) && !p(a,c) && !p(b,c)
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* \li \a c if p(a,b) && !p(b,c) && p(a,c) || !p(a,b) && !p(a,c) && p(b,c)
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*
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* \ingroup utility_algorithms
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*/
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template <typename T, class BP> inline
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const T& Median( const T& a, const T& b, const T& c, BP p ) noexcept( noexcept( p ) )
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{
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return p( a, b ) ? (p( b, c ) ? b : (p( a, c ) ? c : a)) :
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(p( a, c ) ? a : (p( b, c ) ? c : b));
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns a reference to the specified object \a x, if and only if it belongs
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* to the range [a,b]. Returns a reference to the nearest range bounding object
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* otherwise. Returns:
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*
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* \li \a x if (a <= x <= b)
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* \li \a a if (x < a)
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* \li \a b if (b < x)
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*
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* \ingroup utility_algorithms
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*/
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template <typename T> inline constexpr
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const T& Range( const T& x, const T& a, const T& b ) noexcept
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{
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PCL_PRECONDITION( a < b )
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return (x < a) ? a : ((b < x) ? b : x);
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns a reference to the specified object \a x, if and only if it belongs
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* to the range [a,b], as specified by the binary predicate \a p. Returns a
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* reference to the nearest range bounding object otherwise. Returns:
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*
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* \li \a x if !p(x,a) && !p(b,x)
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* \li \a a if p(x,a)
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* \li \a b if p(b,x)
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*
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* \ingroup utility_algorithms
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*/
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template <typename T, class BP> inline
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const T& Range( const T& x, const T& a, const T& b, BP p ) noexcept( noexcept( p ) )
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{
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PCL_PRECONDITION( p( a, b ) )
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return p( x, a ) ? a : (p( b, x ) ? b : x);
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns the number of elements in the specified C array \a a.
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*
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* \ingroup utility_algorithms
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*/
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#define ItemsInArray( a ) (sizeof( a )/sizeof( *a ))
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// ----------------------------------------------------------------------------
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/*!
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* Exchanges two objects \a a and \a b.
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*
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* \ingroup utility_algorithms
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*/
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template <typename T> inline
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void Swap( T& a, T& b ) noexcept( std::is_nothrow_copy_constructible<T>::value
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&& std::is_nothrow_copy_assignable<T>::value
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&& std::is_nothrow_move_assignable<T>::value )
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{
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T c( a ); a = b; b = std::move( c );
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}
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// ----------------------------------------------------------------------------
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/*!
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* Applies a unary function \a f to the range [i,j). For each iterator t in the
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* range [i,j) this function performs the function call f(*t).
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class F> inline
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void Apply( FI i, FI j, F f ) noexcept( noexcept( f ) )
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{
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for( ; i != j; ++i )
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f( *i );
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}
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// ----------------------------------------------------------------------------
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/*!
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* Applies a binary function \a f to the range [i,j) with the specified
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* right-hand constant argument \a x. For each iterator t in the range [i,j)
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* this function performs the function call f(*t,x).
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class F, typename T1> inline
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void Apply( FI i, FI j, F f, T1 x ) noexcept( noexcept( f ) )
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{
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for( ; i != j; ++i )
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f( *i, x );
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}
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// ----------------------------------------------------------------------------
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/*!
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* Applies a unary function \a f to those elements in the range [i,j) that
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* satisfy a condition given by a unary predicate \a p. For each iterator t in
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* the range [i,j) this function performs the function call f(*t) if and only
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* if p(*t) is true.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class F, class UP> inline
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void ApplyIf( FI i, FI j, F f, UP p ) noexcept( noexcept( f ) && noexcept( p ) )
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{
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for( ; i != j; ++i )
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if ( p( *i ) )
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f( *i );
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}
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// ----------------------------------------------------------------------------
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/*!
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* Applies a unary function \a f to those elements in the range [i,j) that
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* satisfy a condition given by a unary predicate \a p, with right-hand
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* constant argument \a x. For each iterator t in the range [i,j) this function
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* performs the function call f(*t,x) if and only if p(*t) is true.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class F, class UP, typename T1> inline
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void ApplyIf( FI i, FI j, F f, UP p, T1 x ) noexcept( noexcept( f ) && noexcept( p ) )
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{
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for( ; i != j; ++i )
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if ( p( *i ) )
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f( *i, x );
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns the first iterator t in the range [i,j) such that the specified
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* unary predicate p(*t) is true, or j if no such iterator exists.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class UP> inline
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FI FirstThat( FI i, FI j, UP p ) noexcept( noexcept( p ) )
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{
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for ( ; i != j; ++i )
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if ( p( *i ) )
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break;
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return i;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns the first iterator t in the range [i,j) such that the specified
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* unary predicate p(*t,x) is true, or j if no such iterator exists.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class UP, typename T1> inline
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FI FirstThat( FI i, FI j, UP p, T1 x ) noexcept( noexcept( p ) )
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{
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for ( ; i != j; ++i )
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if ( p( *i, x ) )
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break;
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return i;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns the last iterator t in the range [i,j) such that the specified
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* unary predicate p(*t) is true, or j if no such iterator exists.
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*
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* \ingroup utility_algorithms
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*/
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template <class BI, class UP> inline
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BI LastThat( BI i, BI j, UP p ) noexcept( noexcept( p ) )
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{
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for ( BI k = j; i != k; )
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if ( p( *--k ) )
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return k;
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return j;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns the last iterator t in the range [i,j) such that the specified
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* unary predicate p(*t,x) is true, or j if no such iterator exists.
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*
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* \ingroup utility_algorithms
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*/
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template <class BI, class UP, typename T1> inline
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BI LastThat( BI i, BI j, UP p, T1 x ) noexcept( noexcept( p ) )
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{
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for ( BI k = j; i != k; )
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if ( p( *--k, x ) )
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return k;
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return j;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns the total number of objects in the range [i,j) that are equal to
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* the specified constant object \a v.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, typename T> inline
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size_type Count( FI i, FI j, const T& v ) noexcept
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{
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size_type N = 0;
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for( ; i != j; ++i )
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if ( *i == v )
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++N;
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return N;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns the total number of objects in the range [i,j) that are equal to
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* a constant object \a v, as specified by the binary predicate \a p. For each
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* iterator t in the range [i,j), counts the number of objects for which
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* p(*t,v) is true.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, typename T, class BP> inline
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size_type Count( FI i, FI j, const T& v, BP p ) noexcept( noexcept( p ) )
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{
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size_type N = 0;
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for( ; i != j; ++i )
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if ( p( *i, v ) )
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++N;
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return N;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns the total number of objects in the range [i,j) that satisfy a
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* condition given by a unary predicate \a p. For each iterator t in the range
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* [i,j), counts the number of objects for which p(*t) is true.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class UP> inline
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size_type CountIf( FI i, FI j, UP p ) noexcept( noexcept( p ) )
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{
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size_type N = 0;
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for( ; i != j; ++i )
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if ( p( *i ) )
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++N;
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return N;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns an iterator m in the range [i,j) such that *m <= *t for any t != m
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* in [i,j). Returns j if and only if i == j.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI> inline
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FI MinItem( FI i, FI j ) noexcept
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{
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FI k = i;
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if ( i != j )
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while ( ++i != j )
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if ( *i < *k )
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k = i;
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return k;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns an iterator m in the range [i,j) such that p(*t,*m) is false for any
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* t != m in [i,j). Returns j if and only if i == j.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class BP> inline
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FI MinItem( FI i, FI j, BP p ) noexcept( noexcept( p ) )
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{
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FI k = i;
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if ( i != j )
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while ( ++i != j )
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if ( p( *i, *k ) )
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k = i;
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return k;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns an iterator m in the range [i,j) such that *m >= *t for any t != m
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* in [i,j). Returns j if and only if i == j.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI> inline
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FI MaxItem( FI i, FI j ) noexcept
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{
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FI k = i;
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if ( i != j )
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while ( ++i != j )
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if ( *k < *i )
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k = i;
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return k;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Returns an iterator m in the range [i,j) such that p(*m,*t) is false for any
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* t != m in [i,j). Returns j if and only if i == j.
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*
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* \ingroup utility_algorithms
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*/
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template <class FI, class BP> inline
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FI MaxItem( FI i, FI j, BP p ) noexcept( noexcept( p ) )
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{
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FI k = i;
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if ( i != j )
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while ( ++i != j )
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if ( p( *k, *i ) )
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k = i;
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return k;
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}
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// ----------------------------------------------------------------------------
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/*!
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* Finds two iterators n and m in the range [i,j) such that *n <= *u for any
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* u != n in [i,j) and *m >= *v for any v != m in [i,j).
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*
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* \ingroup utility_algorithms
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*/
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template <class FI> inline
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void FindExtremeItems( FI& kmin, FI& kmax, FI i, FI j ) noexcept
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{
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kmin = kmax = i;
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if ( i != j )
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while ( ++i != j )
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{
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if ( *i < *kmin )
|
|
kmin = i;
|
|
if ( *kmax < *i )
|
|
kmax = i;
|
|
}
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* Finds two iterators n and m in the range [i,j) such that p(*u,*n) is false
|
|
* for any u != n in [i,j) and p(*m,*v) is false for any v != m in [i,j).
|
|
*
|
|
* \ingroup utility_algorithms
|
|
*/
|
|
template <class FI, class BP> inline
|
|
void FindExtremeItems( FI& kmin, FI& kmax, FI i, FI j, BP p ) noexcept( noexcept( p ) )
|
|
{
|
|
kmin = kmax = i;
|
|
if ( i != j )
|
|
while ( ++i != j )
|
|
{
|
|
if ( p( *i, *kmin ) )
|
|
kmin = i;
|
|
if ( p( *kmax, *i ) )
|
|
kmax = i;
|
|
}
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* Returns a tuple {i,j} such that *i != *j, where i >= i1 and j is in the
|
|
* range [i2,j2), or a tuple {i>=i1,j2} if no such j exists.
|
|
*
|
|
* \ingroup utility_algorithms
|
|
*/
|
|
template <class FI1, class FI2> inline
|
|
Association<FI1, FI2> FindNotEqual( FI1 i1, FI2 i2, FI2 j2 ) noexcept
|
|
{
|
|
for ( ; i2 != j2 && *i1 == *i2; ++i1, ++i2 ) {}
|
|
return Associate( i1, i2 );
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* Returns a tuple {i,j} such that p(*i,*j) is false, where i >= i1 and j is in
|
|
* the range [i2,j2), or a tuple {i>=i1,j2} if no such j exists.
|
|
*
|
|
* \ingroup utility_algorithms
|
|
*/
|
|
template <class FI1, class FI2, class BP> inline
|
|
Association<FI1, FI2> FindNotEqual( FI1 i1, FI2 i2, FI2 j2, BP p ) noexcept
|
|
{
|
|
for ( ; i2 != j2 && p( *i1, *i2 ); ++i1, ++i2 ) {}
|
|
return Associate( i1, i2 );
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* Returns true iff the objects in the range [i1,j1) are equal to the
|
|
* corresponding objects in the range [i2,j2), with
|
|
* j1 = Advance(i1,Distance(i2,j2)).
|
|
*
|
|
* \ingroup utility_algorithms
|
|
*/
|
|
template <class FI1, class FI2> inline
|
|
bool Equal( FI1 i1, FI2 i2, FI2 j2 ) noexcept
|
|
{
|
|
return FindNotEqual( i1, i2, j2 ).second == j2;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* Returns true iff the objects in the range [i1,j1) satisfy the condition
|
|
* specified by the binary predicate \a p for the corresponding objects in the
|
|
* range [i2,j2), with j1 = Advance(i1,Distance(i2,j2)).
|
|
*
|
|
* \ingroup utility_algorithms
|
|
*/
|
|
template <class FI1, class FI2, class BP> inline
|
|
bool Equal( FI1 i1, FI2 i2, FI2 j2, BP p ) noexcept( noexcept( p ) )
|
|
{
|
|
return FindNotEqual( i1, i2, j2, p ).second == j2;
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* Performs a comparison of the objects in the ranges [i1,j1) and [i2,j2).
|
|
* Returns the result of the comparison encoded as an integer:
|
|
*
|
|
* Returns 0 if:
|
|
*
|
|
* \li (1) Distance(i1,j1) == Distance(i2,j2).
|
|
* \li (2) For each pair {u,v} of iterators such that u in [i1,j1) and v in
|
|
* [i2,j2) and Distance(i1,u) == Distance(i2,v), *u == *v.
|
|
*
|
|
* Returns -1 if:
|
|
*
|
|
* \li (3) A pair {u,v} of iterators exists such that u in [i1,j1) and v in
|
|
* [i2,j2) and Distance(i1,u) == Distance(i2,v) and *u < *v.
|
|
* \li (4) Condition (2) is true and Distance(i1,j1) < Distance(i2,j2).
|
|
*
|
|
* Returns +1 if:
|
|
*
|
|
* \li (5) A pair {u,v} of iterators exists such that u in [i1,j1) and v in
|
|
* [i2,j2) and Distance(i1,u) == Distance(i2,v) and *v < *u.
|
|
* \li (6) Condition (2) is true and Distance(i1,j1) > Distance(i2,j2).
|
|
*
|
|
* \ingroup utility_algorithms
|
|
*/
|
|
template <class FI1, class FI2> inline
|
|
int Compare( FI1 i1, FI1 j1, FI2 i2, FI2 j2 ) noexcept
|
|
{
|
|
for ( ; ; ++i1, ++i2 )
|
|
{
|
|
if ( i1 == j1 )
|
|
return (i2 == j2) ? 0 : -1;
|
|
if ( i2 == j2 )
|
|
return +1;
|
|
if ( *i1 < *i2 )
|
|
return -1;
|
|
if ( *i2 < *i1 )
|
|
return +1;
|
|
}
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
/*!
|
|
* Performs a comparison of the objects in the ranges [i1,j1) and [i2,j2) as
|
|
* specified by a binary predicate \a p. Returns the result of the comparison
|
|
* encoded as an integer:
|
|
*
|
|
* Returns 0 if:
|
|
*
|
|
* \li (1) Distance(i1,j1) == Distance(i2,j2).
|
|
* \li (2) For each pair {u,v} of iterators such that u in [i1,j1) and v in
|
|
* [i2,j2) and Distance(i1,u) == Distance(i2,v), both p(*u,*v) and p(*v,*u) are
|
|
* false.
|
|
*
|
|
* Returns -1 if:
|
|
*
|
|
* \li (3) A pair {u,v} of iterators exists such that u in [i1,j1) and v in
|
|
* [i2,j2) and Distance(i1,u) == Distance(i2,v) and p(*u,*v) is true.
|
|
* \li (4) Condition (2) is true and Distance(i1,j1) < Distance(i2,j2).
|
|
*
|
|
* Returns +1 if:
|
|
*
|
|
* \li (5) A pair {u,v} of iterators exists such that u in [i1,j1) and v in
|
|
* [i2,j2) and Distance(i1,u) == Distance(i2,v) and p(*v,*u) is true.
|
|
* \li (6) Condition (2) is true and Distance(i1,j1) > Distance(i2,j2).
|
|
*
|
|
* \ingroup utility_algorithms
|
|
*/
|
|
template <class FI1, class FI2, class BP> inline
|
|
int Compare( FI1 i1, FI1 j1, FI2 i2, FI2 j2, BP p ) noexcept( noexcept( p ) )
|
|
{
|
|
for ( ; ; ++i1, ++i2 )
|
|
{
|
|
if ( i1 == j1 )
|
|
return (i2 == j2) ? 0 : -1;
|
|
if ( i2 == j2 )
|
|
return +1;
|
|
if ( p( *i1, *i2 ) )
|
|
return -1;
|
|
if ( p( *i2, *i1 ) )
|
|
return +1;
|
|
}
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
} // pcl
|
|
|
|
#endif // __PCL_Utility_h
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// EOF pcl/Utility.h - Released 2022-03-12T18:59:29Z
|