FixedOracle.hpp

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#ifndef TATAMI_FIXED_ORACLE_HPP
#define TATAMI_FIXED_ORACLE_HPP
 
#include "../base/Oracle.hpp"
 
#include <vector>
#include <cstddef>
 
#include "sanisizer/sanisizer.hpp"
 
namespace tatami {
 
template<typename Index_, typename Pointer_ = const Index_*>
class FixedViewOracle final : public Oracle<Index_> {
public:
    FixedViewOracle(Pointer_ ptr, const PredictionIndex number) : my_reference(ptr), my_length(number) {
        sanisizer::can_cast<std::size_t>(number); // make sure that array is addressable by all [0, number).
    }
 
    PredictionIndex total() const {
        return my_length;
    }
 
    Index_ get(PredictionIndex i) const {
        return my_reference[i];
    }
 
private:
    Pointer_ my_reference;
    PredictionIndex my_length;
};
 
template<typename Index_, class Container_ = std::vector<Index_> >
class FixedVectorOracle final : public Oracle<Index_> {
public:
    FixedVectorOracle(Container_ sequence) : my_sequence(std::move(sequence)) {
        sanisizer::can_cast<PredictionIndex>(my_sequence.size()); // make sure that total() will return a sensible value.
    }
 
    PredictionIndex total() const {
        return my_sequence.size();
    }
 
    Index_ get(PredictionIndex i) const {
        return my_sequence[i];
    }
 
private:
    Container_ my_sequence;
};
 
}
 
#endif