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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 "WebString.h"
     33 
     34 #include "PlatformString.h"
     35 #include <wtf/text/CString.h>
     36 #include <wtf/text/AtomicString.h>
     37 
     38 #include "WebCString.h"
     39 
     40 namespace WebKit {
     41 
     42 class WebStringPrivate : public WTF::StringImpl {
     43 };
     44 
     45 void WebString::reset()
     46 {
     47     if (m_private) {
     48         m_private->deref();
     49         m_private = 0;
     50     }
     51 }
     52 
     53 void WebString::assign(const WebString& other)
     54 {
     55     assign(const_cast<WebStringPrivate*>(other.m_private));
     56 }
     57 
     58 void WebString::assign(const WebUChar* data, size_t length)
     59 {
     60     assign(static_cast<WebStringPrivate*>(
     61         WTF::StringImpl::create(data, length).get()));
     62 }
     63 
     64 size_t WebString::length() const
     65 {
     66     return m_private ? const_cast<WebStringPrivate*>(m_private)->length() : 0;
     67 }
     68 
     69 const WebUChar* WebString::data() const
     70 {
     71     return m_private ? const_cast<WebStringPrivate*>(m_private)->characters() : 0;
     72 }
     73 
     74 WebCString WebString::utf8() const
     75 {
     76     return WTF::String(m_private).utf8();
     77 }
     78 
     79 WebString WebString::fromUTF8(const char* data, size_t length)
     80 {
     81     return WTF::String::fromUTF8(data, length);
     82 }
     83 
     84 WebString WebString::fromUTF8(const char* data)
     85 {
     86     return WTF::String::fromUTF8(data);
     87 }
     88 
     89 bool WebString::equals(const WebString& s) const
     90 {
     91     return equal(m_private, s.m_private);
     92 }
     93 
     94 WebString::WebString(const WTF::String& s)
     95     : m_private(static_cast<WebStringPrivate*>(s.impl()))
     96 {
     97     if (m_private)
     98         m_private->ref();
     99 }
    100 
    101 WebString& WebString::operator=(const WTF::String& s)
    102 {
    103     assign(static_cast<WebStringPrivate*>(s.impl()));
    104     return *this;
    105 }
    106 
    107 WebString::operator WTF::String() const
    108 {
    109     return m_private;
    110 }
    111 
    112 WebString::WebString(const WTF::AtomicString& s)
    113     : m_private(0)
    114 {
    115     assign(s.string());
    116 }
    117 
    118 WebString& WebString::operator=(const WTF::AtomicString& s)
    119 {
    120     assign(s.string());
    121     return *this;
    122 }
    123 
    124 WebString::operator WTF::AtomicString() const
    125 {
    126     return WTF::AtomicString(static_cast<WTF::StringImpl *>(m_private));
    127 }
    128 
    129 void WebString::assign(WebStringPrivate* p)
    130 {
    131     // Take care to handle the case where m_private == p
    132     if (p)
    133         p->ref();
    134     if (m_private)
    135         m_private->deref();
    136     m_private = p;
    137 }
    138 
    139 } // namespace WebKit
    140