cs-lab34/main.cpp

#include <curl/curl.h>

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

using namespace std;

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

Input input_data(istream& in, bool promt = false) {

    //ïåðåìåííàÿ-ýêçåìïëÿð
    Input qin;

    //ââîä êîëè÷åñòâà ÷èñåë
    size_t number_count;
    if( promt ) {
        cerr << "Enter number count: ";
    }
    in >> number_count;

    //ââîä ÷èñåë
    qin.numbers.resize(number_count);
    for (size_t i = 0 ; i < number_count ; i++) {
        in >> qin.numbers[i];
    }

    //ââîä êîëè÷åñòâà êîðçèí
    if( promt ) {
        cerr << "Enter bin count: ";
    }
    in >> qin.bin_count;
    return qin;
}

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

Input download(const string& address) {
    stringstream buffer;
    CURL *curl = curl_easy_init();
    if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
        CURLcode res = curl_easy_perform(curl);
        curl_easy_cleanup(curl);
        if(res != 0){
            cerr << curl_easy_strerror(res);
            exit(1);
        }
    }
    return input_data(buffer, false);
}

int main(int argc, char* argv[]) {

    curl_global_init(CURL_GLOBAL_ALL);

    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);
}