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Issue 5188006: Push version 2.5.7 to trunk.... (Closed) Base URL: http://v8.googlecode.com/svn/trunk/
Patch Set: Created 10 years, 1 month ago
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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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693 return Top::TerminateExecution(); 693 return Top::TerminateExecution();
694 } 694 }
695 if (StackGuard::IsInterrupted()) { 695 if (StackGuard::IsInterrupted()) {
696 // interrupt 696 // interrupt
697 StackGuard::Continue(INTERRUPT); 697 StackGuard::Continue(INTERRUPT);
698 return Top::StackOverflow(); 698 return Top::StackOverflow();
699 } 699 }
700 return Heap::undefined_value(); 700 return Heap::undefined_value();
701 } 701 }
702 702
703 // --- G C E x t e n s i o n ---
704
705 const char* const GCExtension::kSource = "native function gc();";
706
707
708 v8::Handle<v8::FunctionTemplate> GCExtension::GetNativeFunction(
709 v8::Handle<v8::String> str) {
710 return v8::FunctionTemplate::New(GCExtension::GC);
711 }
712
713
714 v8::Handle<v8::Value> GCExtension::GC(const v8::Arguments& args) {
715 // All allocation spaces other than NEW_SPACE have the same effect.
716 Heap::CollectAllGarbage(false);
717 return v8::Undefined();
718 }
719
720
721 static GCExtension gc_extension;
722 static v8::DeclareExtension gc_extension_declaration(&gc_extension);
723
724
725 // --- E x t e r n a l i z e S t r i n g E x t e n s i o n ---
726
727
728 template <typename Char, typename Base>
729 class SimpleStringResource : public Base {
730 public:
731 // Takes ownership of |data|.
732 SimpleStringResource(Char* data, size_t length)
733 : data_(data),
734 length_(length) {}
735
736 virtual ~SimpleStringResource() { delete[] data_; }
737
738 virtual const Char* data() const { return data_; }
739
740 virtual size_t length() const { return length_; }
741
742 private:
743 Char* const data_;
744 const size_t length_;
745 };
746
747
748 typedef SimpleStringResource<char, v8::String::ExternalAsciiStringResource>
749 SimpleAsciiStringResource;
750 typedef SimpleStringResource<uc16, v8::String::ExternalStringResource>
751 SimpleTwoByteStringResource;
752
753
754 const char* const ExternalizeStringExtension::kSource =
755 "native function externalizeString();"
756 "native function isAsciiString();";
757
758
759 v8::Handle<v8::FunctionTemplate> ExternalizeStringExtension::GetNativeFunction(
760 v8::Handle<v8::String> str) {
761 if (strcmp(*v8::String::AsciiValue(str), "externalizeString") == 0) {
762 return v8::FunctionTemplate::New(ExternalizeStringExtension::Externalize);
763 } else {
764 ASSERT(strcmp(*v8::String::AsciiValue(str), "isAsciiString") == 0);
765 return v8::FunctionTemplate::New(ExternalizeStringExtension::IsAscii);
766 }
767 }
768
769
770 v8::Handle<v8::Value> ExternalizeStringExtension::Externalize(
771 const v8::Arguments& args) {
772 if (args.Length() < 1 || !args[0]->IsString()) {
773 return v8::ThrowException(v8::String::New(
774 "First parameter to externalizeString() must be a string."));
775 }
776 bool force_two_byte = false;
777 if (args.Length() >= 2) {
778 if (args[1]->IsBoolean()) {
779 force_two_byte = args[1]->BooleanValue();
780 } else {
781 return v8::ThrowException(v8::String::New(
782 "Second parameter to externalizeString() must be a boolean."));
783 }
784 }
785 bool result = false;
786 Handle<String> string = Utils::OpenHandle(*args[0].As<v8::String>());
787 if (string->IsExternalString()) {
788 return v8::ThrowException(v8::String::New(
789 "externalizeString() can't externalize twice."));
790 }
791 if (string->IsAsciiRepresentation() && !force_two_byte) {
792 char* data = new char[string->length()];
793 String::WriteToFlat(*string, data, 0, string->length());
794 SimpleAsciiStringResource* resource = new SimpleAsciiStringResource(
795 data, string->length());
796 result = string->MakeExternal(resource);
797 if (result && !string->IsSymbol()) {
798 i::ExternalStringTable::AddString(*string);
799 }
800 if (!result) delete resource;
801 } else {
802 uc16* data = new uc16[string->length()];
803 String::WriteToFlat(*string, data, 0, string->length());
804 SimpleTwoByteStringResource* resource = new SimpleTwoByteStringResource(
805 data, string->length());
806 result = string->MakeExternal(resource);
807 if (result && !string->IsSymbol()) {
808 i::ExternalStringTable::AddString(*string);
809 }
810 if (!result) delete resource;
811 }
812 if (!result) {
813 return v8::ThrowException(v8::String::New("externalizeString() failed."));
814 }
815 return v8::Undefined();
816 }
817
818
819 v8::Handle<v8::Value> ExternalizeStringExtension::IsAscii(
820 const v8::Arguments& args) {
821 if (args.Length() != 1 || !args[0]->IsString()) {
822 return v8::ThrowException(v8::String::New(
823 "isAsciiString() requires a single string argument."));
824 }
825 return Utils::OpenHandle(*args[0].As<v8::String>())->IsAsciiRepresentation() ?
826 v8::True() : v8::False();
827 }
828
829
830 static ExternalizeStringExtension externalize_extension;
831 static v8::DeclareExtension externalize_extension_declaration(
832 &externalize_extension);
833
834 } } // namespace v8::internal 703 } } // namespace v8::internal
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