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/*
* include/framework/RecordInterface.h
*
* Copyright (C) 2023 Douglas Rumbaugh <drumbaugh@psu.edu>
* Dong Xie <dongx@psu.edu>
*
* All rights reserved. Published under the Modified BSD License.
*
*/
#pragma once
#include <cstring>
#include <concepts>
#include <cmath>
#include "util/base.h"
#include "util/hash.h"
namespace de {
template<typename R>
concept RecordInterface = requires(R r, R s) {
{ r < s } ->std::convertible_to<bool>;
{ r == s } ->std::convertible_to<bool>;
};
template<typename R>
concept WeightedRecordInterface = requires(R r) {
{r.weight} -> std::convertible_to<double>;
};
template<typename R>
concept NDRecordInterface = RecordInterface<R> && requires(R r, R s) {
{r.calc_distance(s)} -> std::convertible_to<double>;
};
template <typename R>
concept KVPInterface = RecordInterface<R> && requires(R r) {
r.key;
r.value;
};
template<RecordInterface R>
struct Wrapped {
uint32_t header;
R rec;
inline void set_delete() {
header |= 2;
}
inline bool is_deleted() const {
return header & 2;
}
inline void set_tombstone(bool val=true) {
if (val) {
header |= val;
} else {
header &= 0;
}
}
inline bool is_tombstone() const {
return header & 1;
}
inline bool operator<(const Wrapped& other) const {
return rec < other.rec || (rec == other.rec && header < other.header);
}
};
template <typename K, typename V>
struct Record {
K key;
V value;
uint32_t header = 0;
inline bool operator<(const Record& other) const {
return key < other.key || (key == other.key && value < other.value);
}
inline bool operator==(const Record& other) const {
return key == other.key && value == other.value;
}
};
template <typename K, typename V, typename W>
struct WeightedRecord {
K key;
V value;
W weight = 1;
inline bool operator==(const WeightedRecord& other) const {
return key == other.key && value == other.value;
}
inline bool operator<(const WeightedRecord& other) const {
return key < other.key || (key == other.key && value < other.value);
}
};
template <typename V, size_t D=2>
struct Point{
V data[D];
inline bool operator==(const Point& other) const {
for (size_t i=0; i<D; i++) {
if (data[i] != other.data[i]) {
return false;
}
}
return true;
}
// lexicographic order
inline bool operator<(const Point& other) const {
for (size_t i=0; i<D; i++) {
if (data[i] < other.data[i]) {
return true;
} else if (data[i] > other.data[i]) {
return false;
}
}
return false;
}
inline double calc_distance(const Point& other) const {
double dist = 0;
for (size_t i=0; i<D; i++) {
dist += pow(data[i] - other.data[i], 2);
}
return sqrt(dist);
}
};
template<RecordInterface R>
struct RecordHash {
size_t operator()(R const &rec) const {
return hash_bytes((char *) &rec, sizeof(R));
}
};
}
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