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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 | 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" |
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474 v8::Local<v8::Value> result = | 474 v8::Local<v8::Value> result = |
475 v8::Script::Compile(v8::String::New(line))->Run(); | 475 v8::Script::Compile(v8::String::New(line))->Run(); |
476 CHECK_EQ(results[i]->IsUndefined(), result->IsUndefined()); | 476 CHECK_EQ(results[i]->IsUndefined(), result->IsUndefined()); |
477 CHECK_EQ(results[i]->IsNumber(), result->IsNumber()); | 477 CHECK_EQ(results[i]->IsNumber(), result->IsNumber()); |
478 if (result->IsNumber()) { | 478 if (result->IsNumber()) { |
479 CHECK_EQ(Smi::cast(results[i]->ToSmi()->ToObjectChecked())->value(), | 479 CHECK_EQ(Smi::cast(results[i]->ToSmi()->ToObjectChecked())->value(), |
480 result->ToInt32()->Value()); | 480 result->ToInt32()->Value()); |
481 } | 481 } |
482 } | 482 } |
483 } | 483 } |
| 484 |
| 485 |
| 486 TEST(TruncateSlice) { |
| 487 FLAG_string_slices = true; |
| 488 InitializeVM(); |
| 489 v8::HandleScope scope; |
| 490 Handle<String> string = |
| 491 FACTORY->NewStringFromAscii(CStrVector("parentparentparent")); |
| 492 Handle<String> parent = FACTORY->NewConsString(string, string); |
| 493 CHECK(parent->IsConsString()); |
| 494 CHECK(!parent->IsFlat()); |
| 495 Handle<String> slice = FACTORY->NewSubString(parent, 1, 25); |
| 496 // After slicing, the original string becomes a flat cons. |
| 497 CHECK(parent->IsFlat()); |
| 498 CHECK(slice->IsSlicedString()); |
| 499 CHECK_EQ(SlicedString::cast(*slice)->parent(), |
| 500 ConsString::cast(*parent)->first()); |
| 501 CHECK(SlicedString::cast(*slice)->parent()->IsSeqString()); |
| 502 CHECK(!slice->IsTruncated()); |
| 503 CHECK(!slice->IsFlatAndTruncated()); |
| 504 CHECK(slice->IsFlat()); |
| 505 TruncateString(slice); |
| 506 CHECK(slice->IsTruncated()); |
| 507 CHECK(slice->IsFlatAndTruncated()); |
| 508 CHECK_NE(slice->GetIndirect(), parent->GetIndirect()); |
| 509 } |
| 510 |
| 511 |
| 512 TEST(TrivialSlice) { |
| 513 // This tests whether a slice that contains the entire parent string |
| 514 // actually creates a new string (it should not). |
| 515 FLAG_string_slices = true; |
| 516 InitializeVM(); |
| 517 HandleScope scope; |
| 518 v8::Local<v8::Value> result; |
| 519 Handle<String> string; |
| 520 const char* init = "var str = 'abcdefghijklmnopqrstuvwxyz';"; |
| 521 const char* check = "str.slice(0,26)"; |
| 522 const char* crosscheck = "str.slice(1,25)"; |
| 523 |
| 524 v8::Script::Compile(v8::String::New(init))->Run(); |
| 525 |
| 526 result = v8::Script::Compile(v8::String::New(check))->Run(); |
| 527 CHECK(result->IsString()); |
| 528 string = v8::Utils::OpenHandle(v8::String::Cast(*result)); |
| 529 CHECK(!string->IsSlicedString()); |
| 530 |
| 531 string = FACTORY->NewSubString(string, 0, 26); |
| 532 CHECK(!string->IsSlicedString()); |
| 533 |
| 534 result = v8::Script::Compile(v8::String::New(crosscheck))->Run(); |
| 535 CHECK(result->IsString()); |
| 536 string = v8::Utils::OpenHandle(v8::String::Cast(*result)); |
| 537 CHECK(string->IsSlicedString()); |
| 538 CHECK_EQ("bcdefghijklmnopqrstuvwxy", *(string->ToCString())); |
| 539 } |
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