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| 1 /* | 1 /* |
| 2 * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserv
ed. | 2 * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserv
ed. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
| 11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
| 12 * | 12 * |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 24 */ | 24 */ |
| 25 | 25 |
| 26 #ifndef CString_h | 26 #ifndef CString_h |
| 27 #define CString_h | 27 #define CString_h |
| 28 | 28 |
| 29 #include <wtf/PassRefPtr.h> | 29 #include "wtf/PassRefPtr.h" |
| 30 #include <wtf/RefCounted.h> | 30 #include "wtf/RefCounted.h" |
| 31 #include <wtf/Vector.h> | 31 #include "wtf/Vector.h" |
| 32 #include "wtf/WTFExport.h" |
| 32 | 33 |
| 33 namespace WTF { | 34 namespace WTF { |
| 34 | 35 |
| 35 // CStringBuffer is the ref-counted storage class for the characters in a CStrin
g. | 36 // CStringBuffer is the ref-counted storage class for the characters in a CStrin
g. |
| 36 // The data is implicitly allocated 1 character longer than length(), as it is z
ero-terminated. | 37 // The data is implicitly allocated 1 character longer than length(), as it is z
ero-terminated. |
| 37 class CStringBuffer : public RefCounted<CStringBuffer> { | 38 class CStringBuffer : public RefCounted<CStringBuffer> { |
| 38 // This is needed because we malloc() space for a CStringBuffer plus an | 39 // This is needed because we malloc() space for a CStringBuffer plus an |
| 39 // immediately following buffer, as a performance tweak. | 40 // immediately following buffer, as a performance tweak. |
| 40 NEW_DELETE_SAME_AS_MALLOC_FREE; | 41 NEW_DELETE_SAME_AS_MALLOC_FREE; |
| 41 public: | 42 public: |
| 42 const char* data() { return m_data; } | 43 const char* data() { return m_data; } |
| 43 size_t length() const { return m_length; } | 44 size_t length() const { return m_length; } |
| 44 | 45 |
| 45 private: | 46 private: |
| 46 friend class CString; | 47 friend class CString; |
| 47 | 48 |
| 48 static PassRefPtr<CStringBuffer> createUninitialized(size_t length); | 49 static PassRefPtr<CStringBuffer> createUninitialized(size_t length); |
| 49 | 50 |
| 50 CStringBuffer(size_t length) : m_length(length) { } | 51 CStringBuffer(size_t length) : m_length(length) { } |
| 51 char* mutableData() { return m_data; } | 52 char* mutableData() { return m_data; } |
| 52 | 53 |
| 53 const unsigned m_length; | 54 const unsigned m_length; |
| 54 char m_data[1]; | 55 char m_data[1]; |
| 55 }; | 56 }; |
| 56 | 57 |
| 57 // A container for a null-terminated char array supporting copy-on-write | 58 // A container for a null-terminated char array supporting copy-on-write |
| 58 // assignment. The contained char array may be null. | 59 // assignment. The contained char array may be null. |
| 59 class CString { | 60 class WTF_EXPORT CString { |
| 60 public: | 61 public: |
| 61 CString() { } | 62 CString() { } |
| 62 CString(const char*); | 63 CString(const char*); |
| 63 CString(const char*, size_t length); | 64 CString(const char*, size_t length); |
| 64 CString(CStringBuffer* buffer) : m_buffer(buffer) { } | 65 CString(CStringBuffer* buffer) : m_buffer(buffer) { } |
| 65 static CString newUninitialized(size_t length, char*& characterBuffer); | 66 static CString newUninitialized(size_t length, char*& characterBuffer); |
| 66 | 67 |
| 67 const char* data() const | 68 const char* data() const |
| 68 { | 69 { |
| 69 return m_buffer ? m_buffer->data() : 0; | 70 return m_buffer ? m_buffer->data() : 0; |
| 70 } | 71 } |
| 71 char* mutableData(); | 72 char* mutableData(); |
| 72 size_t length() const | 73 size_t length() const |
| 73 { | 74 { |
| 74 return m_buffer ? m_buffer->length() : 0; | 75 return m_buffer ? m_buffer->length() : 0; |
| 75 } | 76 } |
| 76 | 77 |
| 77 bool isNull() const { return !m_buffer; } | 78 bool isNull() const { return !m_buffer; } |
| 78 bool isSafeToSendToAnotherThread() const; | 79 bool isSafeToSendToAnotherThread() const; |
| 79 | 80 |
| 80 CStringBuffer* buffer() const { return m_buffer.get(); } | 81 CStringBuffer* buffer() const { return m_buffer.get(); } |
| 81 | 82 |
| 82 private: | 83 private: |
| 83 void copyBufferIfNeeded(); | 84 void copyBufferIfNeeded(); |
| 84 void init(const char*, size_t length); | 85 void init(const char*, size_t length); |
| 85 RefPtr<CStringBuffer> m_buffer; | 86 RefPtr<CStringBuffer> m_buffer; |
| 86 }; | 87 }; |
| 87 | 88 |
| 88 bool operator==(const CString& a, const CString& b); | 89 WTF_EXPORT bool operator==(const CString& a, const CString& b); |
| 89 inline bool operator!=(const CString& a, const CString& b) { return !(a == b); } | 90 inline bool operator!=(const CString& a, const CString& b) { return !(a == b); } |
| 90 bool operator==(const CString& a, const char* b); | 91 WTF_EXPORT bool operator==(const CString& a, const char* b); |
| 91 inline bool operator!=(const CString& a, const char* b) { return !(a == b); } | 92 inline bool operator!=(const CString& a, const char* b) { return !(a == b); } |
| 92 | 93 |
| 93 } // namespace WTF | 94 } // namespace WTF |
| 94 | 95 |
| 95 using WTF::CString; | 96 using WTF::CString; |
| 96 | 97 |
| 97 #endif // CString_h | 98 #endif // CString_h |
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