/usr/include/libqhullcpp/functionObjects.h is in libqhull-dev 2012.1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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**
** Copyright (c) 2008-2012 C.B. Barber. All rights reserved.
** $Id: //main/2011/qhull/src/libqhullcpp/functionObjects.h#4 $$Change: 1464 $
** $DateTime: 2012/01/25 22:58:41 $$Author: bbarber $
**
****************************************************************************/
#ifndef QHFUNCTIONOBJECTS_H
#define QHFUNCTIONOBJECTS_H
#include <stdlib.h>
#include <math.h>
namespace orgQhull {
#//Type
//! Sum of absolute values of the elements in a container
class AbsoluteSumOf;
//! Sum of the elements in a container
class SumOf;
//! Sum of squares of the elements in a container
class SumSquaresOf;
#//Class
//! Absolute sum of the elements in a container
class AbsoluteSumOf
{
private:
double sum;
public:
inline AbsoluteSumOf() : sum(0.0) {}
inline void operator()(double v) { sum += fabs(v); }
inline operator double() { return sum; }
};//AbsoluteSumOf
//! Sum of the elements in a container
class SumOf
{
private:
double sum;
public:
inline SumOf() : sum(0.0) {}
inline void operator()(double v) { sum += v; }
inline operator double() { return sum; }
};//SumOf
//! Sum of squares of the elements in a container
class SumSquaresOf
{
private:
double sum;
public:
inline SumSquaresOf() : sum(0.0) {}
inline void operator()(double v) { sum += v*v; }
inline operator double() { return sum; }
};//SumSquaresOf
}//orgQhull
#endif //QHFUNCTIONOBJECTS_H
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