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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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503 | 503 |
504 switch (representation_tag()) { | 504 switch (representation_tag()) { |
505 case kSlicedStringTag: { | 505 case kSlicedStringTag: { |
506 SlicedString* ss = SlicedString::cast(this); | 506 SlicedString* ss = SlicedString::cast(this); |
507 // The SlicedString constructor should ensure that there are no | 507 // The SlicedString constructor should ensure that there are no |
508 // SlicedStrings that are constructed directly on top of other | 508 // SlicedStrings that are constructed directly on top of other |
509 // SlicedStrings. | 509 // SlicedStrings. |
510 ASSERT(!ss->buffer()->IsSlicedString()); | 510 ASSERT(!ss->buffer()->IsSlicedString()); |
511 Object* ok = String::cast(ss->buffer())->Flatten(); | 511 Object* ok = String::cast(ss->buffer())->Flatten(); |
512 if (ok->IsFailure()) return ok; | 512 if (ok->IsFailure()) return ok; |
| 513 // Under certain circumstances (TryFlatten fails in String::Slice) |
| 514 // we can have a cons string under a slice. In this case we need |
| 515 // to get the flat string out of the cons! |
| 516 if (String::cast(ok)->StringIsConsString()) { |
| 517 ss->set_buffer(ConsString::cast(ok)->first()); |
| 518 } |
513 return this; | 519 return this; |
514 } | 520 } |
515 case kConsStringTag: { | 521 case kConsStringTag: { |
516 ConsString* cs = ConsString::cast(this); | 522 ConsString* cs = ConsString::cast(this); |
517 if (String::cast(cs->second())->length() == 0) { | 523 if (String::cast(cs->second())->length() == 0) { |
518 return this; | 524 return this; |
519 } | 525 } |
520 // There's little point in putting the flat string in new space if the | 526 // There's little point in putting the flat string in new space if the |
521 // cons string is in old space. It can never get GCed until there is | 527 // cons string is in old space. It can never get GCed until there is |
522 // an old space GC. | 528 // an old space GC. |
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6472 // No break point. | 6478 // No break point. |
6473 if (break_point_objects()->IsUndefined()) return 0; | 6479 if (break_point_objects()->IsUndefined()) return 0; |
6474 // Single beak point. | 6480 // Single beak point. |
6475 if (!break_point_objects()->IsFixedArray()) return 1; | 6481 if (!break_point_objects()->IsFixedArray()) return 1; |
6476 // Multiple break points. | 6482 // Multiple break points. |
6477 return FixedArray::cast(break_point_objects())->length(); | 6483 return FixedArray::cast(break_point_objects())->length(); |
6478 } | 6484 } |
6479 | 6485 |
6480 | 6486 |
6481 } } // namespace v8::internal | 6487 } } // namespace v8::internal |
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