1 /* 2 * Copyright (C) 2003, 2006, 2008, 2009, 2010 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 "PassRefPtr.h" 30 #include "RefCounted.h" 31 #include "Vector.h" 32 33 namespace WTF { 34 35 class CStringBuffer : public RefCounted<CStringBuffer> { 36 public: data()37 const char* data() { return m_vector.data(); } length()38 size_t length() { return m_vector.size(); } 39 40 private: 41 friend class CString; 42 create(size_t length)43 static PassRefPtr<CStringBuffer> create(size_t length) { return adoptRef(new CStringBuffer(length)); } CStringBuffer(size_t length)44 CStringBuffer(size_t length) : m_vector(length) { } mutableData()45 char* mutableData() { return m_vector.data(); } 46 47 Vector<char> m_vector; 48 }; 49 50 // A container for a null-terminated char array supporting copy-on-write 51 // assignment. The contained char array may be null. 52 class CString { 53 public: CString()54 CString() { } 55 CString(const char*); 56 CString(const char*, size_t length); CString(CStringBuffer * buffer)57 CString(CStringBuffer* buffer) : m_buffer(buffer) { } 58 static CString newUninitialized(size_t length, char*& characterBuffer); 59 data()60 const char* data() const 61 { 62 return m_buffer ? m_buffer->data() : 0; 63 } 64 char* mutableData(); length()65 size_t length() const 66 { 67 return m_buffer ? m_buffer->length() - 1 : 0; 68 } 69 isNull()70 bool isNull() const { return !m_buffer; } 71 buffer()72 CStringBuffer* buffer() const { return m_buffer.get(); } 73 74 private: 75 void copyBufferIfNeeded(); 76 void init(const char*, size_t length); 77 RefPtr<CStringBuffer> m_buffer; 78 }; 79 80 bool operator==(const CString& a, const CString& b); 81 inline bool operator!=(const CString& a, const CString& b) { return !(a == b); } 82 83 } // namespace WTF 84 85 using WTF::CString; 86 87 #endif // CString_h 88