API/OpaqueJSString.h

   1 /*
   2  * Copyright (C) 2008 Apple 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
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef OpaqueJSString_h
  27 #define OpaqueJSString_h
  28
  29 #include <runtime/UString.h>
  30
  31 namespace JSC {
  32     class Identifier;
  33     class JSGlobalData;
  34 }
  35
  36 struct OpaqueJSString : public ThreadSafeShared<OpaqueJSString> {
  37
  38     static PassRefPtr<OpaqueJSString> create() // null
  39     {
  40         return adoptRef(new OpaqueJSString);
  41     }
  42
  43     static PassRefPtr<OpaqueJSString> create(const UChar* characters, unsigned length)
  44     {
  45         return adoptRef(new OpaqueJSString(characters, length));
  46     }
  47
  48     static PassRefPtr<OpaqueJSString> create(const JSC::UString&);
  49
  50     UChar* characters() { return this ? m_characters : 0; }
  51     unsigned length() { return this ? m_length : 0; }
  52
  53     JSC::UString ustring() const;
  54     JSC::Identifier identifier(JSC::JSGlobalData*) const;
  55
  56 private:
  57     friend class WTF::ThreadSafeShared<OpaqueJSString>;
  58
  59     OpaqueJSString()
  60         : m_characters(0)
  61         , m_length(0)
  62     {
  63     }
  64
  65     OpaqueJSString(const UChar* characters, unsigned length)
  66         : m_length(length)
  67     {
  68         m_characters = new UChar[length];
  69         memcpy(m_characters, characters, length * sizeof(UChar));
  70     }
  71
  72     ~OpaqueJSString()
  73     {
  74         delete[] m_characters;
  75     }
  76
  77     UChar* m_characters;
  78     unsigned m_length;
  79 };
  80
  81 #endif