code: ЛР4 сохранение данных в буфер

main.cpp

@@ -4,6 +4,7 @@
 #include "text.h"
 #include "svg.h"
 #include <curl/curl.h>
+#include <sstream>
 
 
 using namespace std;
@@ -15,56 +16,71 @@ struct Input {
     size_t bin_count{};
 };
 
-Input input_data(istream& in, bool prompt) {
+Input input_data(istream& str, bool prompt) {
 
     size_t number_count;
     if (prompt){
         cerr << "Enter number count: ";
     }
-    in >> number_count;
+    str >> number_count;
 
-    Input on;
+    Input in;
 
     if (prompt){
         cerr << "Enter bin count: ";
     }
-    in >> on.bin_count;
+    str >> in.bin_count;
 
-    on.numbers.resize(number_count);
+    in.numbers.resize(number_count);
 
     if (prompt){
         cerr << "Enter numbers: ";
     }
     for (size_t i = 0; i < number_count; i++) {
-        in >> on.numbers[i];
+        str >> in.numbers[i];
     }
-    return on;
+    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;
+    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;
+    CURL* curl = curl_easy_init();
+    if(curl) {
+        CURLcode res;
+        res = curl_easy_perform(curl);
+
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+
+        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, false);
+}
+
 int main( int argc, char* argv[]){
+    Input input;
     if (argc > 1){
-        CURL* curl = curl_easy_init();
+        input = download(argv[1]);
-        if(curl) {
+    }else{
-            CURLcode res;
+        input = input_data(cin, true);
-            curl_easy_setopt(curl, CURLOPT_URL, argv[0]);
-            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 0;
     }
 
-    curl_global_init(CURL_GLOBAL_ALL);
+    const auto bins = make_histogram(input);
 
-    bool prompt = true;
-    auto in = input_data(cin, prompt);
-    auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_text(bins, in.bin_count);
     show_histogram_svg(bins);
-    return 0;
 }