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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 99 | pmbaty | 1 | /* |
| 2 | Texel - A UCI chess engine. |
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| 3 | Copyright (C) 2013 Peter Österlund, peterosterlund2@gmail.com |
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| 4 | |||
| 5 | This program is free software: you can redistribute it and/or modify |
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| 6 | it under the terms of the GNU General Public License as published by |
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| 7 | the Free Software Foundation, either version 3 of the License, or |
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| 8 | (at your option) any later version. |
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| 9 | |||
| 10 | This program is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | GNU General Public License for more details. |
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| 14 | |||
| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 17 | */ |
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| 18 | |||
| 19 | /* |
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| 20 | * histogram.hpp |
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| 21 | * |
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| 22 | * Created on: Oct 20, 2013 |
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| 23 | * Author: petero |
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| 24 | */ |
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| 25 | |||
| 26 | #ifndef HISTOGRAM_HPP_ |
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| 27 | #define HISTOGRAM_HPP_ |
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| 28 | |||
| 29 | #include "util.hpp" |
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| 30 | |||
| 31 | /** A histogram over integer range [minV,maxV[. Out of range values are ignored. */ |
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| 32 | template <int minV, int maxV> |
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| 33 | class Histogram { |
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| 34 | public: |
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| 35 | /** Create an empty histogram. */ |
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| 36 | Histogram(); |
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| 37 | |||
| 38 | /** Set all counts to 0. */ |
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| 39 | void clear(); |
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| 40 | |||
| 41 | /** Add a data point. */ |
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| 42 | void add(int value, int count = 1); |
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| 43 | |||
| 44 | /** Get count corresponding to value. */ |
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| 45 | int get(int value) const; |
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| 46 | |||
| 47 | constexpr static int minValue() { return minV; } |
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| 48 | constexpr static int maxValue() { return maxV; } |
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| 49 | |||
| 50 | private: |
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| 51 | int counts[maxV - minV]; |
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| 52 | }; |
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| 53 | |||
| 54 | |||
| 55 | /** RAII class that adds a value to a histogram in the destructor. |
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| 56 | * The value added is equal to the number of times inc() was called. */ |
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| 57 | template <typename Histogram> |
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| 58 | class HistogramAdder { |
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| 59 | public: |
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| 60 | /** Constructor. */ |
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| 61 | HistogramAdder(Histogram& h); |
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| 62 | |||
| 63 | /** Destructor. Adds current value to histogram. */ |
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| 64 | ~HistogramAdder(); |
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| 65 | |||
| 66 | /** Increment value to be added to histogram. */ |
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| 67 | void inc(); |
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| 68 | |||
| 69 | private: |
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| 70 | int value; |
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| 71 | Histogram& hist; |
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| 72 | }; |
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| 73 | |||
| 74 | |||
| 75 | template <int minV, int maxV> |
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| 76 | inline |
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| 77 | Histogram<minV,maxV>::Histogram() { |
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| 78 | static_assert(maxV >= minV, "Negative size not allowed"); |
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| 79 | clear(); |
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| 80 | } |
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| 81 | |||
| 82 | template <int minV, int maxV> |
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| 83 | inline void |
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| 84 | Histogram<minV,maxV>::clear() { |
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| 85 | for (int i = 0; i < (int)COUNT_OF(counts); i++) |
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| 86 | counts[i] = 0; |
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| 87 | } |
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| 88 | |||
| 89 | template <int minV, int maxV> |
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| 90 | inline void |
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| 91 | Histogram<minV,maxV>::add(int value, int count) { |
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| 92 | if ((value >= minV) && (value < maxV)) |
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| 93 | counts[value - minV] += count; |
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| 94 | } |
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| 95 | |||
| 96 | template <int minV, int maxV> |
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| 97 | inline int |
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| 98 | Histogram<minV,maxV>::get(int value) const { |
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| 99 | if ((value >= minV) && (value < maxV)) |
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| 100 | return counts[value - minV]; |
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| 101 | else |
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| 102 | return 0; |
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| 103 | } |
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| 104 | |||
| 105 | |||
| 106 | template <typename Histogram> |
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| 107 | inline |
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| 108 | HistogramAdder<Histogram>::HistogramAdder(Histogram& h) |
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| 109 | : value(0), hist(h) { |
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| 110 | } |
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| 111 | |||
| 112 | template <typename Histogram> |
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| 113 | inline |
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| 114 | HistogramAdder<Histogram>::~HistogramAdder() { |
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| 115 | hist.add(value); |
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| 116 | } |
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| 117 | |||
| 118 | template <typename Histogram> |
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| 119 | inline void |
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| 120 | HistogramAdder<Histogram>::inc() { |
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| 121 | value++; |
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| 122 | } |
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| 123 | |||
| 124 | #endif /* HISTOGRAM_HPP_ */ |