Issue 5183 - Provide async interface for FileSystem

src/Utils.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 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
@@ skipping 17 matching lines @@
 
 std::string Utils::FromV8String(const v8::Handle<v8::Value>& value)
 {
   v8::String::Utf8Value stringValue(value);
   if (stringValue.length())
     return std::string(*stringValue, stringValue.length());
   else
     return std::string();
 }
 
+StringBuffer Utils::StringBufferFromV8String(const v8::Handle<v8::Value>& value)
+{
+  v8::String::Utf8Value stringValue(value);
+  if (stringValue.length())
+    return IFileSystem::IOBuffer(*stringValue, *stringValue + stringValue.length());
+  else
+    return IFileSystem::IOBuffer();
+}
+
 v8::Local<v8::String> Utils::ToV8String(v8::Isolate* isolate, const std::string& str)
 {
   return v8::String::NewFromUtf8(isolate, str.c_str(),
     v8::String::NewStringType::kNormalString, str.length());
+}
+
+v8::Local<v8::String> Utils::StringBufferToV8String(v8::Isolate* isolate, const StringBuffer& str)
+{
+  return v8::String::NewFromUtf8(isolate,
+    reinterpret_cast<const char*>(str.data()),
+    v8::String::NewStringType::kNormalString, str.size());
 }
 
 void Utils::ThrowExceptionInJS(v8::Isolate* isolate, const std::string& str)
 {
   isolate->ThrowException(Utils::ToV8String(isolate, str));
 }
 
 #ifdef _WIN32
 std::wstring Utils::ToUtf16String(const std::string& str)
 {
@@ skipping 41 matching lines @@
     if (FAILED(hr))
     {
       throw std::runtime_error("CanonizeUrl failed\n");
     }
   }
   return canonizedUrl;
 
 }
 #endif