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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 | 2 |
3 // Check that we can traverse very deep stacks of ConsStrings using | 3 // Check that we can traverse very deep stacks of ConsStrings using |
4 // StringInputBuffer. Check that Get(int) works on very deep stacks | 4 // StringInputBuffer. Check that Get(int) works on very deep stacks |
5 // of ConsStrings. These operations may not be very fast, but they | 5 // of ConsStrings. These operations may not be very fast, but they |
6 // should be possible without getting errors due to too deep recursion. | 6 // should be possible without getting errors due to too deep recursion. |
7 | 7 |
8 #include <stdlib.h> | 8 #include <stdlib.h> |
9 | 9 |
10 #include "v8.h" | 10 #include "v8.h" |
11 | 11 |
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495 // After slicing, the original string becomes a flat cons. | 495 // After slicing, the original string becomes a flat cons. |
496 CHECK(parent->IsFlat()); | 496 CHECK(parent->IsFlat()); |
497 CHECK(slice->IsSlicedString()); | 497 CHECK(slice->IsSlicedString()); |
498 CHECK_EQ(SlicedString::cast(*slice)->parent(), | 498 CHECK_EQ(SlicedString::cast(*slice)->parent(), |
499 ConsString::cast(*parent)->first()); | 499 ConsString::cast(*parent)->first()); |
500 CHECK(SlicedString::cast(*slice)->parent()->IsSeqString()); | 500 CHECK(SlicedString::cast(*slice)->parent()->IsSeqString()); |
501 CHECK(slice->IsFlat()); | 501 CHECK(slice->IsFlat()); |
502 } | 502 } |
503 | 503 |
504 | 504 |
| 505 class AsciiVectorResource : public v8::String::ExternalAsciiStringResource { |
| 506 public: |
| 507 explicit AsciiVectorResource(i::Vector<const char> vector) |
| 508 : data_(vector) {} |
| 509 virtual ~AsciiVectorResource() {} |
| 510 virtual size_t length() const { return data_.length(); } |
| 511 virtual const char* data() const { return data_.start(); } |
| 512 private: |
| 513 i::Vector<const char> data_; |
| 514 }; |
| 515 |
| 516 |
| 517 TEST(SliceFromExternal) { |
| 518 FLAG_string_slices = true; |
| 519 InitializeVM(); |
| 520 v8::HandleScope scope; |
| 521 AsciiVectorResource resource( |
| 522 i::Vector<const char>("abcdefghijklmnopqrstuvwxyz", 26)); |
| 523 Handle<String> string = FACTORY->NewExternalStringFromAscii(&resource); |
| 524 CHECK(string->IsExternalString()); |
| 525 Handle<String> slice = FACTORY->NewSubString(string, 1, 25); |
| 526 CHECK(slice->IsSlicedString()); |
| 527 CHECK(string->IsExternalString()); |
| 528 CHECK_EQ(SlicedString::cast(*slice)->parent(), *string); |
| 529 CHECK(SlicedString::cast(*slice)->parent()->IsExternalString()); |
| 530 CHECK(slice->IsFlat()); |
| 531 } |
| 532 |
| 533 |
505 TEST(TrivialSlice) { | 534 TEST(TrivialSlice) { |
506 // This tests whether a slice that contains the entire parent string | 535 // This tests whether a slice that contains the entire parent string |
507 // actually creates a new string (it should not). | 536 // actually creates a new string (it should not). |
508 FLAG_string_slices = true; | 537 FLAG_string_slices = true; |
509 InitializeVM(); | 538 InitializeVM(); |
510 HandleScope scope; | 539 HandleScope scope; |
511 v8::Local<v8::Value> result; | 540 v8::Local<v8::Value> result; |
512 Handle<String> string; | 541 Handle<String> string; |
513 const char* init = "var str = 'abcdefghijklmnopqrstuvwxyz';"; | 542 const char* init = "var str = 'abcdefghijklmnopqrstuvwxyz';"; |
514 const char* check = "str.slice(0,26)"; | 543 const char* check = "str.slice(0,26)"; |
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551 CHECK(SlicedString::cast(*string)->parent()->IsSeqString()); | 580 CHECK(SlicedString::cast(*string)->parent()->IsSeqString()); |
552 CHECK_EQ("bcdefghijklmnopqrstuvwxy", *(string->ToCString())); | 581 CHECK_EQ("bcdefghijklmnopqrstuvwxy", *(string->ToCString())); |
553 | 582 |
554 result = CompileRun(slice_from_slice); | 583 result = CompileRun(slice_from_slice); |
555 CHECK(result->IsString()); | 584 CHECK(result->IsString()); |
556 string = v8::Utils::OpenHandle(v8::String::Cast(*result)); | 585 string = v8::Utils::OpenHandle(v8::String::Cast(*result)); |
557 CHECK(string->IsSlicedString()); | 586 CHECK(string->IsSlicedString()); |
558 CHECK(SlicedString::cast(*string)->parent()->IsSeqString()); | 587 CHECK(SlicedString::cast(*string)->parent()->IsSeqString()); |
559 CHECK_EQ("cdefghijklmnopqrstuvwx", *(string->ToCString())); | 588 CHECK_EQ("cdefghijklmnopqrstuvwx", *(string->ToCString())); |
560 } | 589 } |
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