/usr/include/ThePEG/Utilities/Selector.tcc is in libthepeg-dev 1.8.0-1.
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 | // -*- C++ -*-
//
// Selector.tcc is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2011 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
namespace ThePEG {
template <typename T, typename WeightType>
WeightType Selector<T,WeightType>::erase(const T & t) {
Selector<T,WeightType> newSelector;
WeightType oldsum = WeightType();
for ( iterator it = theMap.begin();
it != theMap.end(); ++it ) {
WeightType r = it->first - oldsum;
oldsum = it->first;
if ( it->second != t ) newSelector.insert(r, it->second);
}
theMap.swap(newSelector.theMap);
return theSum = newSelector.theSum;
}
template <typename T, typename WeightType>
const T & Selector<T,WeightType>::
select(double rnd, double * remainder) const throw(range_error) {
if ( rnd <= 0 )
throw range_error("Random number out of range in Selector::select.");
const_iterator it = theMap.upper_bound(rnd*theSum);
if ( it == theMap.end() )
throw range_error("Empty Selector, or random number out of range "
"in Selector::select");
if ( remainder ) {
if ( it == theMap.begin() )
*remainder = rnd*theSum/(it->first);
else {
const_iterator prit = it;
--prit;
*remainder = (rnd*theSum - prit->first)/(it->first - prit->first);
}
}
return it->second;
}
template <typename T, typename WeightType>
T & Selector<T,WeightType>::
select(double rnd, double * remainder) throw(range_error) {
if ( rnd <= 0 )
throw range_error("Random number out of range in Selector::select.");
iterator it = theMap.upper_bound(rnd*theSum);
if ( it == theMap.end() )
throw range_error("Empty Selector, or random number out of range "
"in Selector::select");
if ( remainder ) {
if ( it == theMap.begin() )
*remainder = rnd*theSum/(it->first);
else {
const_iterator prit = it;
--prit;
*remainder = (rnd*theSum - prit->first)/(it->first - prit->first);
}
}
return it->second;
}
template <typename T, typename WeightType>
template <typename OStream>
void Selector<T,WeightType>::output(OStream & os) const {
os << ounit(theSum,TypeTraits<WeightType>::baseunit) << size();
for ( const_iterator it = theMap.begin(); it != theMap.end(); ++it )
os << ounit(it->first,TypeTraits<WeightType>::baseunit) << it->second;
}
template <typename T, typename WeightType>
template <typename IStream>
void Selector<T,WeightType>::input(IStream & is) {
typedef typename MapType::value_type value_type;
clear();
T t;
WeightType weightsum;
long n;
is >> iunit(theSum,TypeTraits<WeightType>::baseunit) >> n;
while ( n-- ) {
is >> iunit(weightsum,TypeTraits<WeightType>::baseunit) >> t;
theMap.insert(theMap.end(), value_type(weightsum, t));
}
}
}
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