code: добавлена работа с буфером, загруженным по сети

.gitignore

@@ -1,5 +1,6 @@
 /bin
 /obj
+/curl
 lab03.depend
 unittest.depend
 unittest.layout

main.cpp

@@ -1,8 +1,11 @@
 #include <iostream>
+#include <curl/curl.h>
 #include <vector>
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
+#include <sstream>
+#include <string>
 
 using namespace std;
 
@@ -13,33 +16,74 @@ struct Input {
 };
 
 Input
-input_data() {
-    Input in;
+input_data(istream& in, bool prompt) {
+    Input local;
 
     size_t number_count;
     size_t bin_count;
 
-    cerr << "Enter number count: ";
-    cin >> in.number_count;
-    cerr << "Enter bin count: ";
-    cin >> in.bin_count;
+    if (prompt) {
+        cerr << "Enter number count: ";
+    }
+    in >> local.number_count;
+    if (prompt) {
+        cerr << "Enter bin count: ";
+    }
+    in >> local.bin_count;
 
-    in.numbers.resize(in.number_count);
+    local.numbers.resize(local.number_count);
 
-    for (size_t i = 0; i < in.number_count; i++) {
-        cin >> in.numbers[i];
+    for (size_t i = 0; i < local.number_count; i++) {
+        in >> local.numbers[i];
     }
 
-    return in;
+    return local;
 };
 
-int main() {
+Input
+download (const string& address) {
+    stringstream buffer;
+    CURL *curl = curl_easy_init();
+
+    if(curl) {
+        CURLcode res;
+        curl_easy_setopt(curl, CURLOPT_URL, address);
+        res = curl_easy_perform(curl);
+
+        if (res != CURLE_OK) {
+            cerr << curl_easy_strerror(res);
+            exit(1);
+        }
+
+        curl_easy_cleanup(curl);
+    }
+
+    return input_data(buffer, false);
+}
+
+size_t
+write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
+    size_t data_size = item_size * item_count;
+    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
+    buffer->write(static_cast<char*>(items), data_size);
+    return data_size;
+}
+
+int main(int argc, char* argv[]) {
 
     std::string fill = "red";
     std::string stroke = "#000000";
 
-    auto in = input_data();
-    auto bins = make_histogram(in.numbers, in.bin_count);
+    curl_global_init(CURL_GLOBAL_ALL);
+
+    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, fill, stroke);
     return 0;
 }