Issue 5146 - Implement DownloadableSubscription parsing in C++

compiled/FilterNotifier.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #pragma once
 
 #include <cstdio>
 
+#include "base.h"
 #include "library.h"
 #include "String.h"
+
+ABP_NS_BEGIN
 
 class Filter;
 class Subscription;
 
 namespace FilterNotifier
 {
-  enum class Topic
+  enum class Topic : int32_t
   {
     NONE,
     FILTER_ADDED,
     FILTER_REMOVED,
     FILTER_DISABLED,
     FILTER_HITCOUNT,
     FILTER_LASTHIT,
     SUBSCRIPTION_ADDED,
     SUBSCRIPTION_REMOVED,
     SUBSCRIPTION_MOVED,
     SUBSCRIPTION_TITLE,
     SUBSCRIPTION_DISABLED,
     SUBSCRIPTION_FIXEDTITLE,
     SUBSCRIPTION_BEFORE_FILTERS_REPLACED,
     SUBSCRIPTION_FILTERS_REPLACED,
     SUBSCRIPTION_HOMEPAGE,
     SUBSCRIPTION_LASTCHECK,
     SUBSCRIPTION_LASTDOWNLOAD,
     SUBSCRIPTION_DOWNLOADSTATUS,
     SUBSCRIPTION_ERRORS,
   };
 
-  inline void GenerateCustomBindings()
+  template<typename T>
+  inline T lexical_cast(Topic);
+
+  template<>
+  inline int32_t lexical_cast<int32_t>(Topic value)
   {
-    printf("var FilterNotifier = require('filterNotifier').FilterNotifier;\n");
-    printf("var notifierTopics = new Map([\n");
-    printf("  [%i, 'filter.added'],\n", Topic::FILTER_ADDED);
-    printf("  [%i, 'filter.removed'],\n", Topic::FILTER_REMOVED);
-    printf("  [%i, 'filter.disabled'],\n", Topic::FILTER_DISABLED);
-    printf("  [%i, 'filter.hitCount'],\n", Topic::FILTER_HITCOUNT);
-    printf("  [%i, 'filter.lastHit'],\n", Topic::FILTER_LASTHIT);
-    printf("  [%i, 'subscription.added'],\n", Topic::SUBSCRIPTION_ADDED);
-    printf("  [%i, 'subscription.removed'],\n", Topic::SUBSCRIPTION_REMOVED);
-    printf("  [%i, 'subscription.moved'],\n", Topic::SUBSCRIPTION_MOVED);
-    printf("  [%i, 'subscription.title'],\n", Topic::SUBSCRIPTION_TITLE);
-    printf("  [%i, 'subscription.disabled'],\n", Topic::SUBSCRIPTION_DISABLED);
-    printf("  [%i, 'subscription.fixedTitle'],\n", Topic::SUBSCRIPTION_FIXEDTITLE);
-    printf("  [%i, 'subscription.beforefiltersreplaced'],\n",
-           Topic::SUBSCRIPTION_BEFORE_FILTERS_REPLACED);
-    printf("  [%i, 'subscription.filtersreplaced'],\n",
-           Topic::SUBSCRIPTION_FILTERS_REPLACED);
-    printf("  [%i, 'subscription.homepage'],\n", Topic::SUBSCRIPTION_HOMEPAGE);
-    printf("  [%i, 'subscription.lastCheck'],\n", Topic::SUBSCRIPTION_LASTCHECK);
-    printf("  [%i, 'subscription.lastDownload'],\n", Topic::SUBSCRIPTION_LASTDOWNLOAD);
-    printf("  [%i, 'subscription.downloadStatus'],\n", Topic::SUBSCRIPTION_DOWNLOADSTATUS);
-    printf("  [%i, 'subscription.errors'],\n", Topic::SUBSCRIPTION_ERRORS);
-    printf("]);");
+    return static_cast<int32_t>(value);
+  }
+
+  namespace GenerateCustomBindings
+  {
+    inline void printfTopic(const char* format, Topic topic)
+    {
+      ::printf(format, lexical_cast<int32_t>(topic));
+    }
+
+    inline void Generate()
+    {
+      printf("var FilterNotifier = require('filterNotifier').FilterNotifier;\n");
+      printf("var notifierTopics = new Map([\n");
+      printfTopic("  [%i, 'filter.added'],\n", Topic::FILTER_ADDED);
+      printfTopic("  [%i, 'filter.removed'],\n", Topic::FILTER_REMOVED);
+      printfTopic("  [%i, 'filter.disabled'],\n", Topic::FILTER_DISABLED);
+      printfTopic("  [%i, 'filter.hitCount'],\n", Topic::FILTER_HITCOUNT);
+      printfTopic("  [%i, 'filter.lastHit'],\n", Topic::FILTER_LASTHIT);
+      printfTopic("  [%i, 'subscription.added'],\n", Topic::SUBSCRIPTION_ADDED);
+      printfTopic("  [%i, 'subscription.removed'],\n", Topic::SUBSCRIPTION_REMOVED);
+      printfTopic("  [%i, 'subscription.moved'],\n", Topic::SUBSCRIPTION_MOVED);
+      printfTopic("  [%i, 'subscription.title'],\n", Topic::SUBSCRIPTION_TITLE);
+      printfTopic("  [%i, 'subscription.disabled'],\n", Topic::SUBSCRIPTION_DISABLED);
+      printfTopic("  [%i, 'subscription.fixedTitle'],\n", Topic::SUBSCRIPTION_FIXEDTITLE);
+      printfTopic("  [%i, 'subscription.beforefiltersreplaced'],\n", Topic::SUBSCRIPTION_BEFORE_FILTERS_REPLACED);
+      printfTopic("  [%i, 'subscription.filtersreplaced'],\n", Topic::SUBSCRIPTION_FILTERS_REPLACED);
+      printfTopic("  [%i, 'subscription.homepage'],\n", Topic::SUBSCRIPTION_HOMEPAGE);
+      printfTopic("  [%i, 'subscription.lastCheck'],\n", Topic::SUBSCRIPTION_LASTCHECK);
+      printfTopic("  [%i, 'subscription.lastDownload'],\n", Topic::SUBSCRIPTION_LASTDOWNLOAD);
+      printfTopic("  [%i, 'subscription.downloadStatus'],\n", Topic::SUBSCRIPTION_DOWNLOADSTATUS);
+      printfTopic("  [%i, 'subscription.errors'],\n", Topic::SUBSCRIPTION_ERRORS);
+      printf("]);");
+    }
   }
 
   inline void FilterChange(Topic topic, Filter& filter,
       Subscription* subscription = nullptr, unsigned int position = 0)
   {
     JSNotifyFilterChange(topic, filter, subscription, position);
   }
 
   inline void SubscriptionChange(Topic topic, Subscription& subscription)
   {
     JSNotifySubscriptionChange(topic, subscription);
   }
 }
+
+ABP_NS_END