| /* |
| * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef CString_h |
| #define CString_h |
| |
| #include <wtf/PassRefPtr.h> |
| #include <wtf/RefCounted.h> |
| #include <wtf/Vector.h> |
| |
| namespace WTF { |
| |
| // CStringBuffer is the ref-counted storage class for the characters in a CString. |
| // The data is implicitly allocated 1 character longer than length(), as it is zero-terminated. |
| class CStringBuffer : public RefCounted<CStringBuffer> { |
| public: |
| const char* data() { return m_data; } |
| size_t length() const { return m_length; } |
| |
| private: |
| friend class CString; |
| |
| static PassRefPtr<CStringBuffer> createUninitialized(size_t length); |
| |
| CStringBuffer(size_t length) : m_length(length) { } |
| char* mutableData() { return m_data; } |
| |
| const size_t m_length; |
| char m_data[1]; |
| }; |
| |
| // A container for a null-terminated char array supporting copy-on-write |
| // assignment. The contained char array may be null. |
| class CString { |
| public: |
| CString() { } |
| WTF_EXPORT_PRIVATE CString(const char*); |
| WTF_EXPORT_PRIVATE CString(const char*, size_t length); |
| CString(CStringBuffer* buffer) : m_buffer(buffer) { } |
| WTF_EXPORT_PRIVATE static CString newUninitialized(size_t length, char*& characterBuffer); |
| |
| const char* data() const |
| { |
| return m_buffer ? m_buffer->data() : 0; |
| } |
| WTF_EXPORT_PRIVATE char* mutableData(); |
| size_t length() const |
| { |
| return m_buffer ? m_buffer->length() : 0; |
| } |
| |
| bool isNull() const { return !m_buffer; } |
| |
| CStringBuffer* buffer() const { return m_buffer.get(); } |
| |
| private: |
| void copyBufferIfNeeded(); |
| void init(const char*, size_t length); |
| RefPtr<CStringBuffer> m_buffer; |
| }; |
| |
| WTF_EXPORT_PRIVATE bool operator==(const CString& a, const CString& b); |
| inline bool operator!=(const CString& a, const CString& b) { return !(a == b); } |
| |
| } // namespace WTF |
| |
| using WTF::CString; |
| |
| #endif // CString_h |