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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/vespalib/geo/zcurve.h>
#include <string>
#include <cstdint>
#include <limits>
namespace search::common {
/**
* An immutable struct for a (geo) location.
* Contains a point with optional radius, a bounding box, or both.
**/
struct GeoLocation
{
// contained structs and helper constants:
static constexpr int32_t range_low = std::numeric_limits<int32_t>::min();
static constexpr int32_t range_high = std::numeric_limits<int32_t>::max();
static constexpr uint32_t radius_inf = std::numeric_limits<uint32_t>::max();
struct Point {
Point(int32_t x_in, int32_t y_in) : x(x_in), y(y_in) {}
const int32_t x;
const int32_t y;
Point() = delete;
};
struct Aspect {
uint32_t multiplier;
Aspect() : multiplier(0) {}
Aspect(uint32_t multiplier_in) : multiplier(multiplier_in) {}
// for unit tests:
Aspect(double multiplier_in) : multiplier(multiplier_in*4294967296.0) {}
bool active() const { return multiplier != 0; }
};
struct Range {
const int32_t low;
const int32_t high;
bool active() const {
return (low != range_low) || (high != range_high);
}
};
static constexpr Range no_range = {range_low, range_high};
struct Box {
const Range x;
const Range y;
bool active() const { return x.active() || y.active(); }
};
static constexpr Box no_box = {no_range, no_range};
// actual content of struct:
const bool has_point;
Point point;
uint32_t radius;
Aspect x_aspect;
Box bounding_box;
GeoLocation();
// constructors:
GeoLocation(Point p);
GeoLocation(Point p, Aspect xa);
GeoLocation(Point p, uint32_t r);
GeoLocation(Point p, uint32_t r, Aspect xa);
GeoLocation(Box b);
GeoLocation(Box b, Point p);
GeoLocation(Box b, Point p, Aspect xa);
GeoLocation(Box b, Point p, uint32_t r);
GeoLocation(Box b, Point p, uint32_t r, Aspect xa);
// helper methods:
bool has_radius() const { return radius != radius_inf; }
bool valid() const { return has_point || bounding_box.active(); }
bool can_limit() const { return bounding_box.active(); }
uint64_t sq_distance_to(Point p) const;
bool inside_limit(Point p) const;
bool inside_limit(int64_t zcurve_encoded_xy) const {
if (_z_bounding_box.getzFailBoundingBoxTest(zcurve_encoded_xy)) return false;
int32_t x = 0;
int32_t y = 0;
vespalib::geo::ZCurve::decode(zcurve_encoded_xy, &x, &y);
return inside_limit(Point(x, y));
}
private:
// constants for implementation of helper methods:
static constexpr uint64_t sq_radius_inf = std::numeric_limits<uint64_t>::max();
const uint64_t _sq_radius;
const vespalib::geo::ZCurve::BoundingBox _z_bounding_box;
};
} // namespace
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