main: добавлена работа с буфером, загруженным по сети

main.cpp

@@ -1,3 +1,5 @@
+#include <sstream>
+#include <string>
 #include <curl/curl.h>
 #include <iostream>
 #include <vector>
@@ -33,16 +35,16 @@ input_data(istream& in, bool prompt)
     return local;
 }
 
-int main(int argc, char* argv[])
-{
-    curl_global_init(CURL_GLOBAL_ALL);
-    if (argc > 1)
+Input
+download(const string& address)
 {
+    stringstream buffer;
+
     CURL *curl = curl_easy_init();
     if(curl)
         {
             CURLcode res;
-                    curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
+            curl_easy_setopt(curl, CURLOPT_URL, address);
             res = curl_easy_perform(curl);
             if (res != CURLE_OK)
                 {
@@ -51,11 +53,28 @@ int main(int argc, char* argv[])
                 }
             curl_easy_cleanup(curl);
         }
-            return 0;
+    return input_data(buffer, false);
 }
 
-    auto in = input_data(cin, true);
-    auto bins = make_histogram(in.numbers, in.bin_count);
+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(reinterpret_cast<const char*>(items), data_size);
+    return data_size;
+}
+
+
+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);
-    return 0;
 }
+