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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 |
| (...skipping 17 matching lines...) Expand all Loading... |
| 28 | 28 |
| 29 #include "wtf/RefCounted.h" | 29 #include "wtf/RefCounted.h" |
| 30 #include "wtf/RefPtr.h" | 30 #include "wtf/RefPtr.h" |
| 31 #include "wtf/WTFExport.h" | 31 #include "wtf/WTFExport.h" |
| 32 | 32 |
| 33 namespace WTF { | 33 namespace WTF { |
| 34 | 34 |
| 35 // CStringBuffer is the ref-counted storage class for the characters in a CStrin
g. | 35 // 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. | 36 // The data is implicitly allocated 1 character longer than length(), as it is z
ero-terminated. |
| 37 class WTF_EXPORT CStringBuffer : public RefCounted<CStringBuffer> { | 37 class WTF_EXPORT CStringBuffer : public RefCounted<CStringBuffer> { |
| 38 public: | 38 public: |
| 39 const char* data() { return mutableData(); } | 39 const char* data() { return mutableData(); } |
| 40 size_t length() const { return m_length; } | 40 size_t length() const { return m_length; } |
| 41 | 41 |
| 42 private: | 42 private: |
| 43 friend class CString; | 43 friend class CString; |
| 44 friend class RefCounted<CStringBuffer>; | 44 friend class RefCounted<CStringBuffer>; |
| 45 // CStringBuffers are allocated out of the WTF buffer partition. | 45 // CStringBuffers are allocated out of the WTF buffer partition. |
| 46 void* operator new(size_t, void* ptr) { return ptr; } | 46 void* operator new(size_t, void* ptr) { return ptr; } |
| 47 void operator delete(void*); | 47 void operator delete(void*); |
| 48 | 48 |
| 49 static PassRefPtr<CStringBuffer> createUninitialized(size_t length); | 49 static PassRefPtr<CStringBuffer> createUninitialized(size_t length); |
| 50 | 50 |
| 51 CStringBuffer(size_t length) : m_length(length) { } | 51 CStringBuffer(size_t length) |
| 52 char* mutableData() { return reinterpret_cast<char*>(this + 1); } | 52 : m_length(length) {} |
| 53 char* mutableData() { return reinterpret_cast<char*>(this + 1); } |
| 53 | 54 |
| 54 const unsigned m_length; | 55 const unsigned m_length; |
| 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 WTF_EXPORT 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) |
| 65 static CString newUninitialized(size_t length, char*& characterBuffer); | 66 : m_buffer(buffer) {} |
| 67 static CString newUninitialized(size_t length, char*& characterBuffer); |
| 66 | 68 |
| 67 const char* data() const | 69 const char* data() const { |
| 68 { | 70 return m_buffer ? m_buffer->data() : 0; |
| 69 return m_buffer ? m_buffer->data() : 0; | 71 } |
| 70 } | 72 char* mutableData(); |
| 71 char* mutableData(); | 73 size_t length() const { |
| 72 size_t length() const | 74 return m_buffer ? m_buffer->length() : 0; |
| 73 { | 75 } |
| 74 return m_buffer ? m_buffer->length() : 0; | |
| 75 } | |
| 76 | 76 |
| 77 bool isNull() const { return !m_buffer; } | 77 bool isNull() const { return !m_buffer; } |
| 78 bool isSafeToSendToAnotherThread() const; | 78 bool isSafeToSendToAnotherThread() const; |
| 79 | 79 |
| 80 CStringBuffer* buffer() const { return m_buffer.get(); } | 80 CStringBuffer* buffer() const { return m_buffer.get(); } |
| 81 | 81 |
| 82 private: | 82 private: |
| 83 void copyBufferIfNeeded(); | 83 void copyBufferIfNeeded(); |
| 84 void init(const char*, size_t length); | 84 void init(const char*, size_t length); |
| 85 RefPtr<CStringBuffer> m_buffer; | 85 RefPtr<CStringBuffer> m_buffer; |
| 86 }; | 86 }; |
| 87 | 87 |
| 88 WTF_EXPORT bool operator==(const CString& a, const CString& b); | 88 WTF_EXPORT bool operator==(const CString& a, const CString& b); |
| 89 inline bool operator!=(const CString& a, const CString& b) { return !(a == b); } | 89 inline bool operator!=(const CString& a, const CString& b) { |
| 90 return !(a == b); |
| 91 } |
| 90 WTF_EXPORT bool operator==(const CString& a, const char* b); | 92 WTF_EXPORT bool operator==(const CString& a, const char* b); |
| 91 inline bool operator!=(const CString& a, const char* b) { return !(a == b); } | 93 inline bool operator!=(const CString& a, const char* b) { |
| 94 return !(a == b); |
| 95 } |
| 92 | 96 |
| 93 } // namespace WTF | 97 } // namespace WTF |
| 94 | 98 |
| 95 using WTF::CString; | 99 using WTF::CString; |
| 96 | 100 |
| 97 #endif // CString_h | 101 #endif // CString_h |
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