OLD | NEW |
1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_SCANNER_CHARACTER_STREAMS_H_ | 5 #ifndef V8_SCANNER_CHARACTER_STREAMS_H_ |
6 #define V8_SCANNER_CHARACTER_STREAMS_H_ | 6 #define V8_SCANNER_CHARACTER_STREAMS_H_ |
7 | 7 |
8 #include "src/scanner.h" | 8 #include "src/scanner.h" |
9 | 9 |
10 namespace v8 { | 10 namespace v8 { |
(...skipping 25 matching lines...) Expand all Loading... |
36 }; | 36 }; |
37 | 37 |
38 | 38 |
39 // Generic string stream. | 39 // Generic string stream. |
40 class GenericStringUtf16CharacterStream: public BufferedUtf16CharacterStream { | 40 class GenericStringUtf16CharacterStream: public BufferedUtf16CharacterStream { |
41 public: | 41 public: |
42 GenericStringUtf16CharacterStream(Handle<String> data, size_t start_position, | 42 GenericStringUtf16CharacterStream(Handle<String> data, size_t start_position, |
43 size_t end_position); | 43 size_t end_position); |
44 virtual ~GenericStringUtf16CharacterStream(); | 44 virtual ~GenericStringUtf16CharacterStream(); |
45 | 45 |
| 46 virtual bool SetBookmark(); |
| 47 virtual void ResetToBookmark(); |
| 48 |
46 protected: | 49 protected: |
| 50 static const size_t kNoBookmark = -1; |
| 51 |
47 virtual size_t BufferSeekForward(size_t delta); | 52 virtual size_t BufferSeekForward(size_t delta); |
48 virtual size_t FillBuffer(size_t position); | 53 virtual size_t FillBuffer(size_t position); |
49 | 54 |
50 Handle<String> string_; | 55 Handle<String> string_; |
51 size_t length_; | 56 size_t length_; |
| 57 size_t bookmark_; |
52 }; | 58 }; |
53 | 59 |
54 | 60 |
55 // Utf16 stream based on a literal UTF-8 string. | 61 // Utf16 stream based on a literal UTF-8 string. |
56 class Utf8ToUtf16CharacterStream: public BufferedUtf16CharacterStream { | 62 class Utf8ToUtf16CharacterStream: public BufferedUtf16CharacterStream { |
57 public: | 63 public: |
58 Utf8ToUtf16CharacterStream(const byte* data, size_t length); | 64 Utf8ToUtf16CharacterStream(const byte* data, size_t length); |
59 virtual ~Utf8ToUtf16CharacterStream(); | 65 virtual ~Utf8ToUtf16CharacterStream(); |
60 | 66 |
61 static size_t CopyChars(uint16_t* dest, size_t length, const byte* src, | 67 static size_t CopyChars(uint16_t* dest, size_t length, const byte* src, |
(...skipping 60 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
122 int start_position, | 128 int start_position, |
123 int end_position); | 129 int end_position); |
124 virtual ~ExternalTwoByteStringUtf16CharacterStream(); | 130 virtual ~ExternalTwoByteStringUtf16CharacterStream(); |
125 | 131 |
126 virtual void PushBack(uc32 character) { | 132 virtual void PushBack(uc32 character) { |
127 DCHECK(buffer_cursor_ > raw_data_); | 133 DCHECK(buffer_cursor_ > raw_data_); |
128 buffer_cursor_--; | 134 buffer_cursor_--; |
129 pos_--; | 135 pos_--; |
130 } | 136 } |
131 | 137 |
| 138 virtual bool SetBookmark(); |
| 139 virtual void ResetToBookmark(); |
| 140 |
132 protected: | 141 protected: |
133 virtual size_t SlowSeekForward(size_t delta) { | 142 virtual size_t SlowSeekForward(size_t delta) { |
134 // Fast case always handles seeking. | 143 // Fast case always handles seeking. |
135 return 0; | 144 return 0; |
136 } | 145 } |
137 virtual bool ReadBlock() { | 146 virtual bool ReadBlock() { |
138 // Entire string is read at start. | 147 // Entire string is read at start. |
139 return false; | 148 return false; |
140 } | 149 } |
141 Handle<ExternalTwoByteString> source_; | 150 Handle<ExternalTwoByteString> source_; |
142 const uc16* raw_data_; // Pointer to the actual array of characters. | 151 const uc16* raw_data_; // Pointer to the actual array of characters. |
| 152 |
| 153 private: |
| 154 static const size_t kNoBookmark = -1; |
| 155 |
| 156 size_t bookmark_; |
143 }; | 157 }; |
144 | 158 |
145 } } // namespace v8::internal | 159 } } // namespace v8::internal |
146 | 160 |
147 #endif // V8_SCANNER_CHARACTER_STREAMS_H_ | 161 #endif // V8_SCANNER_CHARACTER_STREAMS_H_ |
OLD | NEW |