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// Author: David Alexander
#pragma once
#include <algorithm>
#include <boost/range.hpp>
#include <boost/shared_array.hpp>
#include <boost/utility.hpp>
#include <cassert>
#include <string>
#include <vector>
#include <ConsensusCore/Types.hpp>
namespace ConsensusCore {
// Feature/Features object usage caveats:
// - Feature and Features objects _must_ be stored by value, not reference
// - The underlying array must be allocated using new[]
template <typename T>
class Feature : private boost::shared_array<T>
{
public:
// \brief Allocate a new feature object, copying content from ptr.
Feature(const T* inPtr, int length) : boost::shared_array<T>(new T[length]), length_(length)
{
assert(length >= 0);
std::copy(inPtr, inPtr + length, get());
}
// Our features are typically stored in unsigned char[] or short[].
// Here are constructors to make it easier to stuff those guys into
// a FloatFeature.
Feature(const unsigned char* inPtr, int length)
: boost::shared_array<T>(new T[length]), length_(length)
{
assert(length >= 0);
std::copy(inPtr, inPtr + length, get());
}
// \brief Allocate and zero-fill a new feature object of given length.
explicit Feature(int length) : boost::shared_array<T>(new T[length]()), length_(length)
{
assert(length >= 0);
}
int Length() const { return length_; }
const T& operator[](int i) const { return this->boost::shared_array<T>::operator[](i); }
T& operator[](int i) { return this->boost::shared_array<T>::operator[](i); }
T ElementAt(int i) const { return (*this)[i]; }
std::string ToString() const { return std::string{*this}; }
private:
int length_;
#ifndef SWIG
public:
T* get() { return this->boost::shared_array<T>::get(); }
const T* get() const { return this->boost::shared_array<T>::get(); }
operator std::string() const;
#endif // !SWIG
};
#ifndef SWIG
//
// Support for boost::foreach
//
template <typename T>
inline const T* range_begin(const Feature<T>& f)
{
return f.get();
}
template <typename T>
inline const T* range_end(const Feature<T>& f)
{
return f.get() + f.Length();
}
template <typename T>
inline T* range_begin(Feature<T>& f) // NOLINT
{
return f.get();
}
template <typename T>
inline T* range_end(Feature<T>& f) // NOLINT
{
return f.get() + f.Length();
}
#endif // !SWIG
typedef Feature<float> FloatFeature;
typedef Feature<char> CharFeature;
typedef Feature<int> IntFeature;
}
#ifndef SWIG
namespace boost {
template <typename T>
struct range_const_iterator<ConsensusCore::Feature<T>>
{
typedef const T* type;
};
template <typename T>
struct range_mutable_iterator<ConsensusCore::Feature<T>>
{
typedef T* type;
};
}
#endif // !SWIG
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