code: сохранение данных из сети в буфер

main.cpp

@@ -5,6 +5,8 @@
 #include "text.h"
 #include "svg.h"
 #include <curl/curl.h>
+#include <sstream>
+#include <string>
 
 using namespace std;
 
@@ -29,10 +31,15 @@ inx >> number_count;
 Input in;
 
 in.numbers.resize(number_count);
-if (prompt) cerr << "Input some numbers: ";
-for (size_t i = 0; i < number_count; i++) {
+if (prompt)
+    {
+    cerr << "Input some numbers: ";
+    }
+
+for (size_t i = 0; i < number_count; i++)
+    {
     inx >> in.numbers[i];
-}
+    }
 
 if (prompt) cerr << "Input amount of promejutkov: ";
 inx >> in.bin_count;
@@ -48,35 +55,56 @@ for (size_t i = 0; i < in.bin_count; i++)
 return in;
 }
 
+Input
+download(const string& address) {
+    stringstream buffer;
+
+    CURL* curl = curl_easy_init();
+    if(curl)
+    {
+        CURLcode res;
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+        res = curl_easy_perform(curl);
+        if (res != CURLE_OK)
+            {
+            fprintf(stderr, "curl_easy_perform() failed: %s\n",
+            curl_easy_strerror(res));
+            exit(1);
+            }
+
+
+        curl_easy_cleanup(curl);
+    }
+    return input_data(buffer);
+}
+
+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;
+}
 
 int
 main(int argc, char* argv[])
 {
-    if (argc > 1)
-    {
-        CURL* curl = curl_easy_init();
-    if(curl)
-    {
-        CURLcode res;
-        curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
-        res = curl_easy_perform(curl);
-        if (res != 0)
-            {
-            cout << curl_easy_strerror(res);
-            exit(1);
-            }
-        curl_easy_cleanup(curl);
-    }
-        return 0;
+
+
+    Input input;
+
+    if (argc > 1) {
+        input = download(argv[1]);
+    } else {
+        input = input_data(cin);
     }
 
     curl_global_init(CURL_GLOBAL_ALL);
 
-    auto in = input_data(cin);
+    auto bins = make_histogram(input.numbers, input.bin_count);
 
-    auto bins = make_histogram(in.numbers, in.bin_count);
-
-    show_histogram_svg(bins, in.fill);
+    show_histogram_svg(bins, input.fill);
 
     return 0;
 }