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