code: добавлена работа с буфером, загруженным по сети

main.cpp

@@ -4,6 +4,8 @@
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
+#include <sstream>
+#include <string>
 
 using namespace std;
 
@@ -38,18 +40,14 @@ input_data(istream& in, bool prompt) {
     return local;
 };
 
-int main(int argc, char* argv[]) {
-
-    std::string fill = "red";
-    std::string stroke = "#000000";
-
-    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) {
@@ -59,11 +57,33 @@ int main(int argc, char* argv[]) {
 
         curl_easy_cleanup(curl);
     }
-        return 0;
+
+    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";
+
+    curl_global_init(CURL_GLOBAL_ALL);
+
+    Input input;
+    if (argc > 1) {
+        input = download(argv[1]);
+    } else {
+        input = input_data(cin, true);
     }
 
-    auto in = input_data(cin, true);
-    auto bins = make_histogram(in.numbers, in.bin_count);
+    const auto bins = make_histogram(input.numbers, input.bin_count);
     show_histogram_svg(bins, fill, stroke);
     return 0;
 }