michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: // Original author: ekr@rtfm.com
michael@0: 
michael@0: #ifndef databuffer_h__
michael@0: #define databuffer_h__
michael@0: #include <algorithm>
michael@0: #include <mozilla/Scoped.h>
michael@0: #include <m_cpp_utils.h>
michael@0: #include <nsISupportsImpl.h>
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: class DataBuffer {
michael@0:  public:
michael@0:   DataBuffer() : data_(nullptr), len_(0) {}
michael@0:   DataBuffer(const uint8_t *data, size_t len) {
michael@0:     Assign(data, len);
michael@0:   }
michael@0: 
michael@0:   void Assign(const uint8_t *data, size_t len) {
michael@0:     data_ = new unsigned char[ len ? len : 1];  // Don't depend on new [0].
michael@0:     memcpy(static_cast<void *>(data_.get()),
michael@0:            static_cast<const void *>(data), len);
michael@0:     len_ = len;
michael@0:   }
michael@0: 
michael@0:   const uint8_t *data() const { return data_; }
michael@0:   size_t len() const { return len_; }
michael@0:   const bool empty() const { return len_ != 0; }
michael@0: 
michael@0:   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DataBuffer)
michael@0: 
michael@0: private:
michael@0:   ScopedDeleteArray<uint8_t> data_;
michael@0:   size_t len_;
michael@0: 
michael@0:   DISALLOW_COPY_ASSIGN(DataBuffer);
michael@0: };
michael@0: 
michael@0: }
michael@0: 
michael@0: #endif