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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 #ifndef WebCString_h
     32 #define WebCString_h
     33 
     34 #include "WebCommon.h"
     35 
     36 #if WEBKIT_IMPLEMENTATION
     37 namespace WebCore { class CString; }
     38 #else
     39 #include <string>
     40 #endif
     41 
     42 namespace WebKit {
     43 
     44 class WebCStringPrivate;
     45 class WebString;
     46 
     47 // A single-byte string container with unspecified encoding.  It is
     48 // inexpensive to copy a WebCString object.
     49 //
     50 // WARNING: It is not safe to pass a WebCString across threads!!!
     51 //
     52 class WebCString {
     53 public:
     54     ~WebCString() { reset(); }
     55 
     56     WebCString() : m_private(0) { }
     57 
     58     WebCString(const char* data, size_t len) : m_private(0)
     59     {
     60         assign(data, len);
     61     }
     62 
     63     WebCString(const WebCString& s) : m_private(0) { assign(s); }
     64 
     65     WebCString& operator=(const WebCString& s)
     66     {
     67         assign(s);
     68         return *this;
     69     }
     70 
     71     WEBKIT_API void reset();
     72     WEBKIT_API void assign(const WebCString&);
     73     WEBKIT_API void assign(const char* data, size_t len);
     74 
     75     WEBKIT_API size_t length() const;
     76     WEBKIT_API const char* data() const;
     77 
     78     bool isEmpty() const { return !length(); }
     79     bool isNull() const { return !m_private; }
     80 
     81     WEBKIT_API WebString utf16() const;
     82 
     83     WEBKIT_API static WebCString fromUTF16(const WebUChar* data, size_t length);
     84     WEBKIT_API static WebCString fromUTF16(const WebUChar* data);
     85 
     86 #if WEBKIT_IMPLEMENTATION
     87     WebCString(const WebCore::CString&);
     88     WebCString& operator=(const WebCore::CString&);
     89     operator WebCore::CString() const;
     90 #else
     91     WebCString(const std::string& s) : m_private(0)
     92     {
     93         assign(s.data(), s.length());
     94     }
     95 
     96     WebCString& operator=(const std::string& s)
     97     {
     98         assign(s.data(), s.length());
     99         return *this;
    100     }
    101 
    102     operator std::string() const
    103     {
    104         size_t len = length();
    105         return len ? std::string(data(), len) : std::string();
    106     }
    107 
    108     template <class UTF16String>
    109     static WebCString fromUTF16(const UTF16String& s)
    110     {
    111         return fromUTF16(s.data(), s.length());
    112     }
    113 #endif
    114 
    115 private:
    116     void assign(WebCStringPrivate*);
    117     WebCStringPrivate* m_private;
    118 };
    119 
    120 } // namespace WebKit
    121 
    122 #endif
    123