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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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309 dest += kStepSize; | 309 dest += kStepSize; |
310 src += kStepSize; | 310 src += kStepSize; |
311 } | 311 } |
312 } | 312 } |
313 #endif | 313 #endif |
314 while (dest < limit) { | 314 while (dest < limit) { |
315 *dest++ = static_cast<sinkchar>(*src++); | 315 *dest++ = static_cast<sinkchar>(*src++); |
316 } | 316 } |
317 } | 317 } |
318 | 318 |
| 319 |
| 320 // A resource for using mmapped files to back external strings that are read |
| 321 // from files. |
| 322 class MemoryMappedExternalResource: public |
| 323 v8::String::ExternalAsciiStringResource { |
| 324 public: |
| 325 explicit MemoryMappedExternalResource(const char* filename); |
| 326 MemoryMappedExternalResource(const char* filename, |
| 327 bool remove_file_on_cleanup); |
| 328 virtual ~MemoryMappedExternalResource(); |
| 329 |
| 330 virtual const char* data() const { return data_; } |
| 331 virtual size_t length() const { return length_; } |
| 332 |
| 333 bool exists() const { return file_ != NULL; } |
| 334 bool is_empty() const { return length_ == 0; } |
| 335 |
| 336 bool EnsureIsAscii(bool abort_if_failed) const; |
| 337 bool EnsureIsAscii() const { return EnsureIsAscii(true); } |
| 338 bool IsAscii() const { return EnsureIsAscii(false); } |
| 339 |
| 340 private: |
| 341 void Init(const char* filename); |
| 342 |
| 343 char* filename_; |
| 344 OS::MemoryMappedFile* file_; |
| 345 |
| 346 const char* data_; |
| 347 size_t length_; |
| 348 bool remove_file_on_cleanup_; |
| 349 }; |
| 350 |
| 351 |
319 } } // namespace v8::internal | 352 } } // namespace v8::internal |
320 | 353 |
321 #endif // V8_V8UTILS_H_ | 354 #endif // V8_V8UTILS_H_ |
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