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| 1 /* | 1 /* |
| 2 * Copyright (C) 2008, 2010 Apple Inc. All rights reserved. | 2 * Copyright (C) 2008, 2010 Apple Inc. All rights reserved. |
| 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 * | 7 * |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
| (...skipping 20 matching lines...) Expand all Loading... |
| 31 | 31 |
| 32 #include "wtf/Allocator.h" | 32 #include "wtf/Allocator.h" |
| 33 #include "wtf/Assertions.h" | 33 #include "wtf/Assertions.h" |
| 34 #include "wtf/text/StringImpl.h" | 34 #include "wtf/text/StringImpl.h" |
| 35 #include "wtf/text/Unicode.h" | 35 #include "wtf/text/Unicode.h" |
| 36 | 36 |
| 37 namespace WTF { | 37 namespace WTF { |
| 38 | 38 |
| 39 template <typename CharType> | 39 template <typename CharType> |
| 40 class StringBuffer { | 40 class StringBuffer { |
| 41 DISALLOW_NEW(); | 41 DISALLOW_NEW(); |
| 42 WTF_MAKE_NONCOPYABLE(StringBuffer); | 42 WTF_MAKE_NONCOPYABLE(StringBuffer); |
| 43 public: | |
| 44 StringBuffer() { } | |
| 45 | 43 |
| 46 explicit StringBuffer(unsigned length) | 44 public: |
| 47 { | 45 StringBuffer() {} |
| 48 CharType* characters; | |
| 49 m_data = StringImpl::createUninitialized(length, characters); | |
| 50 } | |
| 51 | 46 |
| 52 ~StringBuffer() | 47 explicit StringBuffer(unsigned length) { |
| 53 { | 48 CharType* characters; |
| 54 } | 49 m_data = StringImpl::createUninitialized(length, characters); |
| 50 } |
| 55 | 51 |
| 56 void shrink(unsigned newLength); | 52 ~StringBuffer() {} |
| 57 | 53 |
| 58 unsigned length() const { return m_data ? m_data->length() : 0; } | 54 void shrink(unsigned newLength); |
| 59 CharType* characters() { return length() ? const_cast<CharType*>(m_data->get
Characters<CharType>()) : 0; } | |
| 60 | 55 |
| 61 CharType& operator[](unsigned i) { ASSERT_WITH_SECURITY_IMPLICATION(i < leng
th()); return characters()[i]; } | 56 unsigned length() const { return m_data ? m_data->length() : 0; } |
| 57 CharType* characters() { |
| 58 return length() ? const_cast<CharType*>(m_data->getCharacters<CharType>()) |
| 59 : 0; |
| 60 } |
| 62 | 61 |
| 63 PassRefPtr<StringImpl> release() { return m_data.release(); } | 62 CharType& operator[](unsigned i) { |
| 63 ASSERT_WITH_SECURITY_IMPLICATION(i < length()); |
| 64 return characters()[i]; |
| 65 } |
| 64 | 66 |
| 65 private: | 67 PassRefPtr<StringImpl> release() { return m_data.release(); } |
| 66 RefPtr<StringImpl> m_data; | 68 |
| 69 private: |
| 70 RefPtr<StringImpl> m_data; |
| 67 }; | 71 }; |
| 68 | 72 |
| 69 template <typename CharType> | 73 template <typename CharType> |
| 70 void StringBuffer<CharType>::shrink(unsigned newLength) | 74 void StringBuffer<CharType>::shrink(unsigned newLength) { |
| 71 { | 75 ASSERT(m_data); |
| 72 ASSERT(m_data); | 76 if (m_data->length() == newLength) |
| 73 if (m_data->length() == newLength) | 77 return; |
| 74 return; | 78 m_data = m_data->substring(0, newLength); |
| 75 m_data = m_data->substring(0, newLength); | |
| 76 } | 79 } |
| 77 | 80 |
| 78 } // namespace WTF | 81 } // namespace WTF |
| 79 | 82 |
| 80 using WTF::StringBuffer; | 83 using WTF::StringBuffer; |
| 81 | 84 |
| 82 #endif // StringBuffer_h | 85 #endif // StringBuffer_h |
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