code: работа с буфером

main.cpp

@@ -1,10 +1,11 @@
 #include <iostream>
 #include <vector>
-
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
 #include <curl/curl.h>
+#include <sstream>
+#include <string>
 
 using namespace std;
 
@@ -47,32 +48,50 @@ inp >> 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_size * item_count;
 
-int main(int argc, char* argv[])
+    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
-{
+    buffer->write(reinterpret_cast<const char*>(items), data_size);
+
+    return data_size;
+}
+
+Input
+download(const string& address) {
+    stringstream buffer;
 
-    if (argc > 1){
     CURL* curl = curl_easy_init();
-       if (curl) {
+    if (curl){
         CURLcode res;
-            curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
+        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 != 0) {
             cout << curl_easy_strerror(res);
             exit(1);
         }
+
+
         curl_easy_cleanup(curl);
     }
-    return 0;
-    }
 
- curl_global_init(CURL_GLOBAL_ALL);
+    return input_data(buffer, false);
+}
+
+
+int main(int argc, char* argv[])
+{
+    Input in;
+    if (argc > 1) {
+        in = download(argv[1]);
+        }
+    else {
+        in = input_data(cin, true);
+    }
 
-unsigned int  n;
-bool prompt=true;
-auto in = input_data(cin, prompt);
-double min,max;
 auto  bins = make_histogram(in.numbers, in.bin_count);
 
 show_histogram_svg ( bins );