cs-lab34/main.cpp

#include <curl/curl.h>
#include <iostream>
#include <vector>
#include <sstream>
#include "histogram.h"
#include "text.h"
#include "svg.h"

using namespace std;

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

Input input_data(istream& stream, bool prompt)
{
    Input in;
    size_t number_count;
    if (prompt){
        cerr << "Enter num count >>";
    }
    stream >> number_count;

    in.numbers.resize(number_count);

    for (size_t i = 0; i < number_count; i++)
    {
        stream >> in.numbers[i];
    }
    if (prompt){
        cerr << "Enter bin count >>";
    }
    stream >> in.bin_count;
    return in;
}

size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
    size_t data_size = item_count * item_size;
    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
    char *item = reinterpret_cast<char *>(items);
    buffer->write(item, data_size);

    return data_size;
}


Input download(const string& address) {
    stringstream buffer;
        curl_global_init(CURL_GLOBAL_ALL);
        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 != CURLE_OK)
            {
                cerr << curl_easy_strerror(res);
                exit(1);
            }
            char* ip_address;
            curl_easy_getinfo(curl, CURLINFO_PRIMARY_IP, &ip_address);
            if (ip_address)
            {
                cerr << ip_address << endl;
            }
            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);
    }

    const auto bins = make_histogram(input.numbers, input.bin_count);
    show_histogram_svg(bins);
}