59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
#pragma once
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#ifdef SIMDJSON_COMPETITION_NLOHMANN_JSON
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#include "distinct_user_id.h"
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namespace distinct_user_id {
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using json = nlohmann::json;
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struct nlohmann_json_sax {
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struct Handler : json::json_sax_t
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{
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std::vector<uint64_t>& result;
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bool user = false;
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bool user_id = false;
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Handler(std::vector<uint64_t> &r) : result(r) { }
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bool key(string_t& val) override {
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// Assume that valid user/id pairs appear only once in main array of user objects
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if (user) { // If already found user object, find id key
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if (val.compare("id") == 0) { user_id = true; }
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}
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else if (val.compare("user") == 0) { user = true; } // Otherwise, find user object
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return true;
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}
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bool number_unsigned(number_unsigned_t val) override {
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if (user_id) {
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result.emplace_back(val);
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user = false;
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user_id = false;
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}
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return true;
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}
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// Irrelevant events
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bool null() override { return true; }
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bool boolean(bool val) override { return true; }
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bool number_float(number_float_t val, const string_t& s) override { return true; }
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bool number_integer(number_integer_t val) override { return true; }
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bool string(string_t& val) override { return true; }
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bool start_object(std::size_t elements) override { return true; }
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bool end_object() override { return true; }
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bool start_array(std::size_t elements) override { return true; }
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bool end_array() override { return true; }
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bool binary(json::binary_t& val) override { return true; }
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bool parse_error(std::size_t position, const std::string& last_token, const json::exception& ex) override { return false; }
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}; // Handler
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bool run(simdjson::padded_string &json, std::vector<uint64_t> &result) {
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Handler handler(result);
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json::sax_parse(json.data(), &handler);
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return true;
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}
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}; // nlohmann_json_sax
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BENCHMARK_TEMPLATE(distinct_user_id, nlohmann_json_sax)->UseManualTime();
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} // namespace distinct_user_id
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#endif // SIMDJSON_COMPETITION_NLOHMANN_JSON
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