json-validator/include/jvalidate/constraint/number_constraint.h

#pragma once

#include <cmath>
#include <iostream>

#include <jvalidate/adapter.h>
#include <jvalidate/constraint/constraint.h>
#include <jvalidate/detail/number.h>
#include <jvalidate/forward.h>
#include <limits>

namespace jvalidate::constraint {
class MaximumConstraint : public SimpleConstraint<MaximumConstraint> {
public:
  double value;
  bool exclusive;

public:
  MaximumConstraint(double value, bool exclusive) : value(value), exclusive(exclusive) {}

  bool operator()(double arg) const { return exclusive ? arg < value : arg <= value; }
};

class MinimumConstraint : public SimpleConstraint<MinimumConstraint> {
public:
  double value;
  bool exclusive;

public:
  MinimumConstraint(double value, bool exclusive) : value(value), exclusive(exclusive) {}

  bool operator()(double arg) const { return exclusive ? arg > value : arg >= value; }
};

class MultipleOfConstraint : public SimpleConstraint<MultipleOfConstraint> {
public:
  double value;

public:
  MultipleOfConstraint(double value) : value(value) {}

  bool operator()(double arg) const {
    if (std::fabs(std::remainder(arg, value)) <= std::numeric_limits<double>::epsilon()) {
      return true;
    }

    double const div = arg / value;
    return std::isfinite(div) && detail::is_json_integer(div);
  }
};
}