cs_ExactMatchFilter.h

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/*
 * Author: Crownstone Team
 * Copyright: Crownstone (https://crownstone.rocks)
 * Date: May 27, 2021
 * License: LGPLv3+, Apache License 2.0, and/or MIT (triple-licensed)
 */
#pragma once
 
#include <protocol/cs_ExactMatchFilterStructs.h>
#include <util/cs_FilterInterface.h>
 
class ExactMatchFilter : public FilterInterface {
public:
    // -------------------------------------------------------------
    // Interface methods.
    // -------------------------------------------------------------
 
    ExactMatchFilter(exact_match_filter_data_t* data);
 
    ExactMatchFilter() : _data(nullptr) {}
 
    bool contains(const void* key, size_t keyLengthInBytes) override;
 
    bool isValid() override;
 
    int find(const void* item, size_t itemSize);
 
    // -------------------------------------------------------------
    // Sizing helpers
    // -------------------------------------------------------------
 
    static constexpr size_t bufferSize(uint8_t itemCount, uint8_t itemSize) { return itemCount * itemSize; }
 
    static constexpr size_t size(uint8_t itemCount, uint8_t itemSize) {
        return sizeof(exact_match_filter_data_t) + bufferSize(itemCount, itemSize);
    }
 
    constexpr size_t bufferSize() { return bufferSize(_data->itemCount, _data->itemSize); }
 
    constexpr size_t size() { return size(_data->itemCount, _data->itemSize); }
 
private:
    uint8_t* getItem(size_t index);
 
    exact_match_filter_data_t* _data;
};