third_party/WebKit/public/platform/WebData.h

   1 /*
   2  * Copyright (C) 2009 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef WebData_h
  32 #define WebData_h
  33
  34 #include "WebCommon.h"
  35 #include "WebPrivatePtr.h"
  36
  37 namespace blink {
  38
  39 class SharedBuffer;
  40
  41 // A container for raw bytes.  It is inexpensive to copy a WebData object.
  42 //
  43 // WARNING: It is not safe to pass a WebData across threads!!!
  44 //
  45 class BLINK_PLATFORM_EXPORT WebData {
  46 public:
  47     ~WebData() { reset(); }
  48
  49     WebData() { }
  50
  51     WebData(const char* data, size_t size)
  52     {
  53         assign(data, size);
  54     }
  55
  56     template <int N>
  57     WebData(const char (&data)[N])
  58     {
  59         assign(data, N - 1);
  60     }
  61
  62     WebData(const WebData& d) { assign(d); }
  63
  64     WebData& operator=(const WebData& d)
  65     {
  66         assign(d);
  67         return *this;
  68     }
  69
  70     void reset();
  71     void assign(const WebData&);
  72     void assign(const char* data, size_t size);
  73
  74     size_t size() const;
  75     const char* data() const;
  76
  77     bool isEmpty() const { return !size(); }
  78     bool isNull() const { return m_private.isNull(); }
  79
  80 #if INSIDE_BLINK
  81     WebData(const PassRefPtr<SharedBuffer>&);
  82     WebData& operator=(const PassRefPtr<SharedBuffer>&);
  83     operator PassRefPtr<SharedBuffer>() const;
  84 #else
  85     template <class C>
  86     WebData(const C& c)
  87     {
  88         assign(c.data(), c.size());
  89     }
  90
  91     template <class C>
  92     WebData& operator=(const C& c)
  93     {
  94         assign(c.data(), c.size());
  95         return *this;
  96     }
  97 #endif
  98
  99 private:
 100     WebPrivatePtr<SharedBuffer> m_private;
 101 };
 102
 103 } // namespace blink
 104
 105 #endif