1 /* 2 * Copyright (C) 2003, 2006, 2008, 2009 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 CString_h 27 #define CString_h 28 29 #include "SharedBuffer.h" 30 31 #include <wtf/PassRefPtr.h> 32 #include <wtf/RefCounted.h> 33 #include <wtf/Vector.h> 34 35 namespace WebCore { 36 37 class CStringBuffer : public RefCounted<CStringBuffer> { 38 public: data()39 const char* data() { return m_vector.data(); } length()40 size_t length() { return m_vector.size(); } 41 42 private: 43 friend class CString; 44 create(unsigned length)45 static PassRefPtr<CStringBuffer> create(unsigned length) { return adoptRef(new CStringBuffer(length)); } CStringBuffer(unsigned length)46 CStringBuffer(unsigned length) : m_vector(length) { } mutableData()47 char* mutableData() { return m_vector.data(); } 48 49 Vector<char> m_vector; 50 }; 51 52 // A container for a null-terminated char array supporting copy-on-write 53 // assignment. The contained char array may be null. 54 class CString { 55 public: CString()56 CString() { } 57 CString(const char*); 58 CString(const char*, unsigned length); CString(CStringBuffer * buffer)59 CString(CStringBuffer* buffer) : m_buffer(buffer) { } 60 static CString newUninitialized(size_t length, char*& characterBuffer); 61 62 const char* data() const; 63 char* mutableData(); 64 unsigned length() const; 65 isNull()66 bool isNull() const { return !m_buffer; } 67 buffer()68 CStringBuffer* buffer() const { return m_buffer.get(); } 69 70 private: 71 void copyBufferIfNeeded(); 72 void init(const char*, unsigned length); 73 RefPtr<CStringBuffer> m_buffer; 74 }; 75 76 bool operator==(const CString& a, const CString& b); 77 inline bool operator!=(const CString& a, const CString& b) { return !(a == b); } 78 79 } // namespace WebCore 80 81 #endif // CString_h 82