cs-lab34/main.cpp

#include <sstream>
#include <string>
#include <curl/curl.h>
#include <iostream>
#include <vector>
#include <string>
#include "histogram.hpp"
#include "text.hpp"
#include "svg.hpp"
using namespace std;

struct Input {
    vector<double> numbers;
    size_t bin_count{};
};

Input input_data(istream& in, bool prompt = 0) {
    size_t number_count;
    
    if (prompt) cerr << "Введите кол-во чисел в строке: ";
    in >> number_count;
    Input input;
    input.numbers.resize(number_count);
    
    if (prompt) cerr << "Введите строку чисел: ";
    for (int i = 0; i < number_count; i++) {
        in >> input.numbers[i];
    }
    
    if (prompt) cerr << "Введите кол-во корзин: ";
    in >> input.bin_count;
    return input;
}

size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
    auto data_size = item_size * item_count;
    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
    buffer->write(reinterpret_cast<const char*>(items), data_size);
    return 0;
}

Input download (const string& address) {
    stringstream buffer;
    CURL *curl = curl_easy_init();
    if(curl) {
        CURLcode res;
        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
        res = curl_easy_perform(curl);
        if(res != false) {
            cout << curl_easy_strerror(res);
            exit(1);
        }
        curl_easy_cleanup(curl);
    }
    return input_data(buffer, false);
}

int main (int argc, char* argv[]) {
    Input input;
    if (argc > 1) {
        input = download(argv[1]);
    } else {
        input = input_data(cin, true);
    }
    auto bins = make_histogram(input.numbers, input.bin_count);
    show_histogram_svg(bins);
    return 0;
}