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| 1 /* | 1 /* |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google 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 are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * 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 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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| 42 // This class lets you get UTF-8 data out of a String without mallocing a | 42 // This class lets you get UTF-8 data out of a String without mallocing a |
| 43 // separate buffer to hold the data if the String happens to be 8 bit and | 43 // separate buffer to hold the data if the String happens to be 8 bit and |
| 44 // contain only ASCII characters. | 44 // contain only ASCII characters. |
| 45 class StringUTF8Adaptor final { | 45 class StringUTF8Adaptor final { |
| 46 DISALLOW_NEW(); | 46 DISALLOW_NEW(); |
| 47 | 47 |
| 48 public: | 48 public: |
| 49 explicit StringUTF8Adaptor(const String& string) : m_data(0), m_length(0) { | 49 explicit StringUTF8Adaptor(const String& string) : m_data(0), m_length(0) { |
| 50 if (string.isEmpty()) | 50 if (string.isEmpty()) |
| 51 return; | 51 return; |
| 52 // Unfortunately, 8 bit WTFStrings are encoded in Latin-1 and GURL uses UTF-
8 | 52 // Unfortunately, 8 bit WTFStrings are encoded in Latin-1 and GURL uses |
| 53 // when processing 8 bit strings. If |relative| is entirely ASCII, we luck o
ut | 53 // UTF-8 when processing 8 bit strings. If |relative| is entirely ASCII, we |
| 54 // and can avoid mallocing a new buffer to hold the UTF-8 data because UTF-8 | 54 // luck out and can avoid mallocing a new buffer to hold the UTF-8 data |
| 55 // and Latin-1 use the same code units for ASCII code points. | 55 // because UTF-8 and Latin-1 use the same code units for ASCII code points. |
| 56 if (string.is8Bit() && string.containsOnlyASCII()) { | 56 if (string.is8Bit() && string.containsOnlyASCII()) { |
| 57 m_data = reinterpret_cast<const char*>(string.characters8()); | 57 m_data = reinterpret_cast<const char*>(string.characters8()); |
| 58 m_length = string.length(); | 58 m_length = string.length(); |
| 59 } else { | 59 } else { |
| 60 m_utf8Buffer = string.utf8(); | 60 m_utf8Buffer = string.utf8(); |
| 61 m_data = m_utf8Buffer.data(); | 61 m_data = m_utf8Buffer.data(); |
| 62 m_length = m_utf8Buffer.length(); | 62 m_length = m_utf8Buffer.length(); |
| 63 } | 63 } |
| 64 } | 64 } |
| 65 | 65 |
| 66 const char* data() const { return m_data; } | 66 const char* data() const { return m_data; } |
| 67 size_t length() const { return m_length; } | 67 size_t length() const { return m_length; } |
| 68 | 68 |
| 69 base::StringPiece asStringPiece() const { | 69 base::StringPiece asStringPiece() const { |
| 70 return base::StringPiece(m_data, m_length); | 70 return base::StringPiece(m_data, m_length); |
| 71 } | 71 } |
| 72 | 72 |
| 73 private: | 73 private: |
| 74 CString m_utf8Buffer; | 74 CString m_utf8Buffer; |
| 75 const char* m_data; | 75 const char* m_data; |
| 76 size_t m_length; | 76 size_t m_length; |
| 77 }; | 77 }; |
| 78 | 78 |
| 79 } // namespace WTF | 79 } // namespace WTF |
| 80 | 80 |
| 81 using WTF::StringUTF8Adaptor; | 81 using WTF::StringUTF8Adaptor; |
| 82 | 82 |
| 83 #endif // StringUTF8Adaptor_h | 83 #endif // StringUTF8Adaptor_h |
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