125 lines
2.7 KiB
C++
125 lines
2.7 KiB
C++
#include "range.hpp"
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#include "debug.hpp"
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#include "maths.hpp"
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#include <limits>
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#include <cstdint>
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using namespace std;
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using namespace util;
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/*
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* Range
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*/
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template <typename T>
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range<T>::range (const json::node &node) {
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if (node.is_string () && (node.to_string () == "UNIT" ||
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node.to_string () == "unit")) {
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min = UNIT.min;
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max = UNIT.max;
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} else if (node.is_string () && (node.to_string () == "UNLIMITED" ||
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node.to_string () == "unlimited")) {
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min = UNLIMITED.min;
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max = UNLIMITED.max;
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} else {
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min = node.to_array ()[0].to_number ();
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max = node.to_array ()[0].to_number ();
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}
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sanity ();
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}
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template <typename T>
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range<T>::range (T _min, T _max):
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min (_min),
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max (_max)
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{ sanity (); }
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template <typename T>
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bool
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range<T>::contains (T val) const
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{ return val >= min && val <= max; }
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template <typename T>
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bool
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range<T>::contains (const range <T> &r) const
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{ return r.min >= min && r.max <= max; }
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template <typename T>
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void
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range<T>::sanity (void) const
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{ check (min <= max); }
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template <typename T>
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T
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range<T>::clamp (T val) const
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{ return std::max (min, std::min (val, max)); }
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template <typename T>
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double
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range<T>::normalise (T val) const {
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return ((double)val - min) /
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((double)max - min);
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}
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template <typename T>
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T
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range<T>::random (void) const {
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double pos = ::rand () / (double)(RAND_MAX);
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return (max - min) * pos + min;
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}
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namespace util {
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template <>
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bool
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range<float>::operator ==(const range<float> &rhs) const
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{ return almost_equal (min, rhs.min) &&
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almost_equal (max, rhs.max); }
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template <>
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bool
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range<double>::operator ==(const range<double> &rhs) const
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{ return almost_equal (min, rhs.min) &&
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almost_equal (max, rhs.max); }
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}
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template <typename T>
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bool
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range<T>::operator ==(const range<T> &rhs) const
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{ return min == rhs.min && max == rhs.max; }
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template <typename T>
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const range<T>
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range<T>::UNLIMITED (numeric_limits <T>::is_integer ? numeric_limits <T>::min () :
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-numeric_limits <T>::infinity (),
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numeric_limits <T>::is_integer ? numeric_limits <T>::max () :
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numeric_limits <T>::infinity ());
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template <typename T>
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const range<T>
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range<T>::UNIT (0.0, 1.0);
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template struct range<double>;
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template struct range<float>;
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template struct range<uint8_t>;
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template struct range<uint16_t>;
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template struct range<uint32_t>;
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template struct range<uint64_t>;
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