| 1 | //
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| 2 | // C++ Interface: HuntLocator
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| 3 | //
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| 4 | // Description:
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| 5 | //
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| 6 | //
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| 7 | // Author: Takeshi Nakazato <takeshi.nakazato@nao.ac.jp>, (C) 2012
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| 8 | //
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| 9 | // Copyright: See COPYING file that comes with this distribution
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| 10 | //
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| 11 | //
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| 12 | #ifndef ASAP_HUNT_LOCATOR_H
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| 13 | #define ASAP_HUNT_LOCATOR_H
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| 14 |
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| 15 | #include "Locator.h"
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| 16 |
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| 17 | namespace asap {
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| 18 |
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| 19 | /**
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| 20 | * Implementation of locate operation by bisection search
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| 21 | * @author TakeshiNakazato
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| 22 | */
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| 23 | template <class T> class HuntLocator : public Locator<T> {
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| 24 | public:
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| 25 | // Default constructor.
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| 26 | HuntLocator();
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| 27 |
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| 28 | // Construct with data
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| 29 | // @param[in] v pointer to input data.
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| 30 | // @param[in] n length of the data.
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| 31 | // @param[in] copystorage whether allocate internal memory or not.
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| 32 | // @see Locator::set()
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| 33 | HuntLocator(T *v, unsigned int n, bool copystorage=true);
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| 34 |
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| 35 | // Destructor.
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| 36 | virtual ~HuntLocator();
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| 37 |
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| 38 | // Return right hand side index of location using bisection search
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| 39 | // plus hunt algorithm.
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| 40 | // @param[in] x input value to be located.
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| 41 | // @return location as an index j.
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| 42 | // @see Locator::locate()
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| 43 | unsigned int locate(T x);
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| 44 | private:
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| 45 | // Hunt algorithm
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| 46 | // @param[in] x input value to be located.
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| 47 | // @param[in,out] left input: the starting point for hunt.
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| 48 | // output: the left index of hunted region.
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| 49 | // @param[out] right the right index of hunted region.
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| 50 | void hunt(T x, unsigned int &left, unsigned int &right);
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| 51 |
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| 52 | // Storage for previous result.
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| 53 | unsigned int prev_;
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| 54 | };
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| 55 |
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| 56 | }
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| 57 |
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| 58 | #include "HuntLocator.tcc"
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| 59 |
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| 60 | #endif
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