/usr/include/SFCGAL/detail/Interval.h is in libsfcgal-dev 1.2.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | /**
* SFCGAL
*
* Copyright (C) 2012-2013 Oslandia <infos@oslandia.com>
* Copyright (C) 2012-2013 IGN (http://www.ign.fr)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _SFCGAL_DETAIL_INTERVAL_H_
#define _SFCGAL_DETAIL_INTERVAL_H_
#include <SFCGAL/config.h>
namespace SFCGAL {
namespace detail {
/**
* Represents an interval
*/
class SFCGAL_API Interval {
public:
/**
* default constructor (empty interval)
*/
Interval() ;
/**
* collapsed interval constructor
*/
Interval( const double& value ) ;
/**
* constructor with two values
*/
Interval( const double& v1, const double& v2 ) ;
/**
* copy constructor
*/
Interval( const Interval& other ) ;
/**
* assign operator
*/
Interval& operator = ( const Interval& other ) ;
/**
* destructor
*/
~Interval() ;
/**
* indicates if the interval is empty
*/
bool isEmpty() const ;
/**
* returns the lower value
*/
inline const double& lower() const {
return _lower;
}
/**
* returns the upper value
*/
inline const double& upper() const {
return _upper;
}
/**
* returns the with of the interval
*/
inline double width() const {
return _upper - _lower ;
}
/**
* expand the interval
*
* @warning no effect if isEmpty()
*/
void expandBy( const double& d ) ;
/**
* expand the interval to include an other interval.
*
* @warning no effect if other.isEmpty()
*/
void expandToInclude( const Interval& other ) ;
/**
* expand the interval to include a value
*
* @warning no effect if value is NaN
*/
void expandToInclude( const double& value ) ;
/**
* test if this intersects other
*/
bool intersects( const Interval& other ) const ;
/**
* compare two intervals
* @warning true for empty intervals
*/
bool operator == ( const Interval& other ) const ;
/**
* compare two intervals
* @warning false for empty intervals
*/
bool operator != ( const Interval& other ) const ;
private:
double _lower ;
double _upper ;
};
}//detail
}//SFCGAL
#endif
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