66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
#pragma once
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#if SIMDJSON_EXCEPTIONS
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#include "partial_tweets.h"
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namespace partial_tweets {
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using namespace simdjson;
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using namespace simdjson::builtin;
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class OnDemand {
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public:
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OnDemand() {
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if(!displayed_implementation) {
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std::cout << "On Demand implementation: " << builtin_implementation()->name() << std::endl;
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displayed_implementation = true;
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}
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}
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simdjson_really_inline bool Run(const padded_string &json);
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simdjson_really_inline const std::vector<tweet> &Result() { return tweets; }
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simdjson_really_inline size_t ItemCount() { return tweets.size(); }
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private:
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ondemand::parser parser{};
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std::vector<tweet> tweets{};
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simdjson_really_inline uint64_t nullable_int(ondemand::value && value) {
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if (value.is_null()) { return 0; }
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return std::move(value);
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}
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simdjson_really_inline twitter_user read_user(ondemand::object && user) {
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// Move user into a local object so it gets destroyed (and moves the iterator)
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ondemand::object u = std::move(user);
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return { u["id"], u["screen_name"] };
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}
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static inline bool displayed_implementation = false;
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};
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simdjson_really_inline bool OnDemand::Run(const padded_string &json) {
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tweets.clear();
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// Walk the document, parsing the tweets as we go
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auto doc = parser.iterate(json);
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for (ondemand::object tweet : doc["statuses"]) {
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tweets.emplace_back(partial_tweets::tweet{
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tweet["created_at"],
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tweet["id"],
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tweet["text"],
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nullable_int(tweet["in_reply_to_status_id"]),
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read_user(tweet["user"]),
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tweet["retweet_count"],
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tweet["favorite_count"]
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});
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}
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return true;
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}
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BENCHMARK_TEMPLATE(PartialTweets, OnDemand);
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} // namespace partial_tweets
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#endif // SIMDJSON_EXCEPTIONS
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