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      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 #include "config.h"
     32 #include "WebData.h"
     33 
     34 #include "SharedBuffer.h"
     35 
     36 using namespace WebCore;
     37 
     38 namespace WebKit {
     39 
     40 class WebDataPrivate : public SharedBuffer {
     41 };
     42 
     43 void WebData::reset()
     44 {
     45     if (m_private) {
     46         m_private->deref();
     47         m_private = 0;
     48     }
     49 }
     50 
     51 void WebData::assign(const WebData& other)
     52 {
     53     WebDataPrivate* p = const_cast<WebDataPrivate*>(other.m_private);
     54     if (p)
     55         p->ref();
     56     assign(p);
     57 }
     58 
     59 void WebData::assign(const char* data, size_t size)
     60 {
     61     assign(static_cast<WebDataPrivate*>(
     62         SharedBuffer::create(data, size).releaseRef()));
     63 }
     64 
     65 size_t WebData::size() const
     66 {
     67     if (!m_private)
     68         return 0;
     69     return const_cast<WebDataPrivate*>(m_private)->size();
     70 }
     71 
     72 const char* WebData::data() const
     73 {
     74     if (!m_private)
     75         return 0;
     76     return const_cast<WebDataPrivate*>(m_private)->data();
     77 }
     78 
     79 WebData::WebData(const PassRefPtr<SharedBuffer>& buffer)
     80     : m_private(static_cast<WebDataPrivate*>(buffer.releaseRef()))
     81 {
     82 }
     83 
     84 WebData& WebData::operator=(const PassRefPtr<SharedBuffer>& buffer)
     85 {
     86     assign(static_cast<WebDataPrivate*>(buffer.releaseRef()));
     87     return *this;
     88 }
     89 
     90 WebData::operator PassRefPtr<SharedBuffer>() const
     91 {
     92     return PassRefPtr<SharedBuffer>(const_cast<WebDataPrivate*>(m_private));
     93 }
     94 
     95 void WebData::assign(WebDataPrivate* p)
     96 {
     97     // p is already ref'd for us by the caller
     98     if (m_private)
     99         m_private->deref();
    100     m_private = p;
    101 }
    102 
    103 } // namespace WebKit
    104