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/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright (C) 2019, Raspberry Pi (Trading) Limited
 *
 * pwl.hpp - piecewise linear functions interface
 */
#pragma once

#include <math.h>
#include <vector>

#include <boost/property_tree/ptree.hpp>

namespace RPi {

class Pwl
{
public:
	struct Interval {
		Interval(double _start, double _end) : start(_start), end(_end)
		{
		}
		double start, end;
		bool Contains(double value)
		{
			return value >= start && value <= end;
		}
		double Clip(double value)
		{
			return value < start ? start
					     : (value > end ? end : value);
		}
		double Len() const { return end - start; }
	};
	struct Point {
		Point() : x(0), y(0) {}
		Point(double _x, double _y) : x(_x), y(_y) {}
		double x, y;
		Point operator-(Point const &p) const
		{
			return Point(x - p.x, y - p.y);
		}
		Point operator+(Point const &p) const
		{
			return Point(x + p.x, y + p.y);
		}
		double operator%(Point const &p) const
		{
			return x * p.x + y * p.y;
		}
		Point operator*(double f) const { return Point(x * f, y * f); }