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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_SYMBOLS_H_ | 5 #ifndef VM_SYMBOLS_H_ |
6 #define VM_SYMBOLS_H_ | 6 #define VM_SYMBOLS_H_ |
7 | 7 |
8 #include "vm/object.h" | 8 #include "vm/object.h" |
9 #include "vm/snapshot_ids.h" | 9 #include "vm/snapshot_ids.h" |
10 | 10 |
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389 class Symbols : public AllStatic { | 389 class Symbols : public AllStatic { |
390 public: | 390 public: |
391 enum { kMaxOneCharCodeSymbol = 0xFF }; | 391 enum { kMaxOneCharCodeSymbol = 0xFF }; |
392 | 392 |
393 // List of strings that are pre created in the vm isolate. | 393 // List of strings that are pre created in the vm isolate. |
394 enum SymbolId { | 394 enum SymbolId { |
395 kIllegal = 0, | 395 kIllegal = 0, |
396 | 396 |
397 #define DEFINE_SYMBOL_INDEX(symbol, literal) \ | 397 #define DEFINE_SYMBOL_INDEX(symbol, literal) \ |
398 k##symbol##Id, | 398 k##symbol##Id, |
399 PREDEFINED_SYMBOLS_LIST(DEFINE_SYMBOL_INDEX) | 399 PREDEFINED_SYMBOLS_LIST(DEFINE_SYMBOL_INDEX) |
400 #undef DEFINE_SYMBOL_INDEX | 400 #undef DEFINE_SYMBOL_INDEX |
401 | 401 |
402 kKwTableStart, // First keyword at kKwTableStart + 1. | 402 kKwTableStart, // First keyword at kKwTableStart + 1. |
403 | 403 |
404 #define DEFINE_KEYWORD_SYMBOL_INDEX(token, chars, ignore1, ignore2) \ | 404 #define DEFINE_KEYWORD_SYMBOL_INDEX(t, s, p, a) \ |
405 token##Id, | 405 t##Id, |
406 DART_KEYWORD_LIST(DEFINE_KEYWORD_SYMBOL_INDEX) | 406 DART_KEYWORD_LIST(DEFINE_KEYWORD_SYMBOL_INDEX) |
407 #undef DEFINE_KEYWORD_SYMBOL_INDEX | 407 #undef DEFINE_KEYWORD_SYMBOL_INDEX |
408 | 408 |
409 kNullCharId, // One char code symbol starts here and takes up 256 entries. | 409 kNullCharId, // One char code symbol starts here and takes up 256 entries. |
410 kMaxPredefinedId = kNullCharId + kMaxOneCharCodeSymbol + 1, | 410 kMaxPredefinedId = kNullCharId + kMaxOneCharCodeSymbol + 1, |
411 }; | 411 }; |
412 | 412 |
413 // Number of one character symbols being predefined in the predefined_ array. | 413 // Number of one character symbols being predefined in the predefined_ array. |
414 static const int kNumberOfOneCharCodeSymbols = | 414 static const int kNumberOfOneCharCodeSymbols = |
415 (kMaxPredefinedId - kNullCharId); | 415 (kMaxPredefinedId - kNullCharId); |
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507 } | 507 } |
508 | 508 |
509 static const String& Empty() { return *(symbol_handles_[kKwTableStart]); } | 509 static const String& Empty() { return *(symbol_handles_[kKwTableStart]); } |
510 static const String& False() { return *(symbol_handles_[kFALSEId]); } | 510 static const String& False() { return *(symbol_handles_[kFALSEId]); } |
511 static const String& Library() { return *(symbol_handles_[kLIBRARYId]); } | 511 static const String& Library() { return *(symbol_handles_[kLIBRARYId]); } |
512 static const String& Super() { return *(symbol_handles_[kSUPERId]); } | 512 static const String& Super() { return *(symbol_handles_[kSUPERId]); } |
513 static const String& This() { return *(symbol_handles_[kTHISId]); } | 513 static const String& This() { return *(symbol_handles_[kTHISId]); } |
514 static const String& True() { return *(symbol_handles_[kTRUEId]); } | 514 static const String& True() { return *(symbol_handles_[kTRUEId]); } |
515 static const String& Void() { return *(symbol_handles_[kVOIDId]); } | 515 static const String& Void() { return *(symbol_handles_[kVOIDId]); } |
516 | 516 |
517 // Access methods for symbol handles stored in the vm isolate. | 517 // Access methods for symbol handles stored in the vm isolate for predefined |
| 518 // symbols. |
518 #define DEFINE_SYMBOL_HANDLE_ACCESSOR(symbol, literal) \ | 519 #define DEFINE_SYMBOL_HANDLE_ACCESSOR(symbol, literal) \ |
519 static const String& symbol() { return *(symbol_handles_[k##symbol##Id]); } | 520 static const String& symbol() { return *(symbol_handles_[k##symbol##Id]); } |
520 PREDEFINED_SYMBOLS_LIST(DEFINE_SYMBOL_HANDLE_ACCESSOR) | 521 PREDEFINED_SYMBOLS_LIST(DEFINE_SYMBOL_HANDLE_ACCESSOR) |
| 522 #undef DEFINE_SYMBOL_HANDLE_ACCESSOR |
| 523 |
| 524 // Access methods for symbol handles stored in the vm isolate for keywords. |
| 525 #define DEFINE_SYMBOL_HANDLE_ACCESSOR(t, s, p, a) \ |
| 526 static const String& t() { return *(symbol_handles_[t##Id]); } |
| 527 DART_KEYWORD_LIST(DEFINE_SYMBOL_HANDLE_ACCESSOR) |
521 #undef DEFINE_SYMBOL_HANDLE_ACCESSOR | 528 #undef DEFINE_SYMBOL_HANDLE_ACCESSOR |
522 | 529 |
523 // Get symbol for scanner keyword. | 530 // Get symbol for scanner keyword. |
524 static const String& Keyword(Token::Kind keyword); | 531 static const String& Keyword(Token::Kind keyword); |
525 | 532 |
526 // Initialize frequently used symbols in the vm isolate. | 533 // Initialize frequently used symbols in the vm isolate. |
527 static void InitOnce(Isolate* isolate); | 534 static void InitOnce(Isolate* isolate); |
528 | 535 |
529 // Initialize and setup a symbol table for the isolate. | 536 // Initialize and setup a symbol table for the isolate. |
530 static void SetupSymbolTable(Isolate* isolate); | 537 static void SetupSymbolTable(Isolate* isolate); |
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602 friend class SnapshotReader; | 609 friend class SnapshotReader; |
603 friend class SnapshotWriter; | 610 friend class SnapshotWriter; |
604 friend class ApiMessageReader; | 611 friend class ApiMessageReader; |
605 | 612 |
606 DISALLOW_COPY_AND_ASSIGN(Symbols); | 613 DISALLOW_COPY_AND_ASSIGN(Symbols); |
607 }; | 614 }; |
608 | 615 |
609 } // namespace dart | 616 } // namespace dart |
610 | 617 |
611 #endif // VM_SYMBOLS_H_ | 618 #endif // VM_SYMBOLS_H_ |
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