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 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /* vim: set ts=2 et sw=2 tw=80: */

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

  * You can obtain one at http://mozilla.org/MPL/2.0/. */

 // Original author: ekr@rtfm.com

 #ifndef databuffer_h__

 #define databuffer_h__

 #include <algorithm>

 #include <mozilla/Scoped.h>

 #include <m_cpp_utils.h>

 #include <nsISupportsImpl.h>

 namespace mozilla {

 class DataBuffer {

  public:

   DataBuffer() : data_(nullptr), len_(0) {}

   DataBuffer(const uint8_t *data, size_t len) {

     Assign(data, len);

   }

   void Assign(const uint8_t *data, size_t len) {

     data_ = new unsigned char[ len ? len : 1];  // Don't depend on new [0].

     memcpy(static_cast<void *>(data_.get()),

            static_cast<const void *>(data), len);

     len_ = len;

   }

   const uint8_t *data() const { return data_; }

   size_t len() const { return len_; }

   const bool empty() const { return len_ != 0; }

   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DataBuffer)

 private:

   ScopedDeleteArray<uint8_t> data_;

   size_t len_;

   DISALLOW_COPY_ASSIGN(DataBuffer);

 };

 }

 #endif