RecompressionQueries/mem_testing.cpp at main · gregzb/RecompressionQueries · GitHub

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#include <fstream>
#include <iostream>
#include <string>
#include <iomanip>
#include <random>
#include <chrono>

#include "s2st.hpp"
#include "superfix.hpp"
#include "fstack.hpp"
#include "parse_tree_ptr.hpp"
#include "uncompressed_parse_tree_ptr.hpp"
#include "parse_tree_levels.hpp"
#include "parse_tree_symbol_processing.hpp"
#include "context_insensitive_decomposition.hpp"
#include "index.hpp"
#include "recompression.hpp"
#include "memory_profiling.hpp"

using namespace recomp;

auto clock_now() {
    return std::chrono::high_resolution_clock::now();
}

double time_between(const auto &a, const auto &b) {
    return std::chrono::duration<double>(b - a).count();
}

template <class F>
double timeF(F f) {
    auto start = clock_now();
    f();
    auto end = clock_now();
    return time_between(start, end);
}

template <class F>
decltype(std::declval<F>()()) timeF(F f, double &time) {
    auto start = clock_now();
    auto ret = f();
    auto end = clock_now();
    time = time_between(start, end);
    return ret;
}

std::string get_file_contents(const char *filename)
{
    std::ifstream in(filename, std::ios::in | std::ios::binary);
    if (in)
    {
        return(std::string((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>()));
    }
    throw(errno);
}

std::vector<Fragment> generate_frag_queries(size_t len, size_t num_queries) {
    std::random_device dev;
    // std::mt19937 rng(dev());
    std::mt19937 rng(0);
    std::uniform_int_distribution<uint64_t> disti(0, 9999999999999ULL);
    std::uniform_int_distribution<uint64_t> distl(4, 60);

    std::vector<Fragment> frag_queries;
    for (size_t i = 0; i < num_queries; i++) {
        size_t index = disti(rng) % len;
        size_t frag_len = std::min(distl(rng), len - index);
        frag_queries.push_back(Fragment{index, frag_len});
    }
    return frag_queries;

}

int main(int argc, char **argv) {
    if (argc != 2) {
        std::cout << "Usage: " << argv[0] << " <input_file>" << std::endl;
        return 1;
    }

    PRINT_MEM();
    auto text = get_file_contents(argv[1]);
    std::cout << "Loaded text file" << std::endl;

    PRINT_MEM("loaded text, before index");

    double t1;
    auto myindex = timeF([&]{return Index::from(text);}, t1);
    std::cout << "Constructed text index in " << t1 << " seconds" << std::endl;
    PRINT_MEM("alloc'd index");

    std::vector<uint8_t> text_vec(text.size());
    for (size_t i = 0; i < text_vec.size(); i++) {
        text_vec[i] = (unsigned char)text[i];
    }

    auto frag_queries = generate_frag_queries(text.size(), 1000);

    std::vector<std::vector<uint8_t>> queries(frag_queries.size());
    std::transform(frag_queries.begin(), frag_queries.end(), queries.begin(), [&](Fragment f){
        auto str = myindex.slp.extract(f.index, f.length);
        std::vector<uint8_t> vec(str.size());
        for (size_t i = 0; i < vec.size(); i++) {
            vec[i] = (unsigned char)str[i];
        }
        return vec;
    });

    std::vector<std::vector<size_t>> query_results_1(frag_queries.size());

    double t2 = timeF([&]{
        for (size_t i = 0; i < frag_queries.size(); i++) {
            auto frag = frag_queries[i];
            myindex.report(frag, [&](int64_t j){
                query_results_1[i].push_back(j);
            });
        }
    });

    std::cout << "Finished index reporting in " << t2 << " seconds" << std::endl;
    return 0;
}