129 lines
4.2 KiB
C++
129 lines
4.2 KiB
C++
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// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "../include/v8-preparser.h"
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#include "globals.h"
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#include "checks.h"
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#include "allocation.h"
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#include "utils.h"
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#include "list.h"
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#include "scanner-base.h"
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#include "preparse-data.h"
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#include "preparser.h"
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namespace v8 {
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namespace internal {
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// UTF16Buffer based on a v8::UnicodeInputStream.
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class InputStreamUTF16Buffer : public UTF16Buffer {
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public:
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explicit InputStreamUTF16Buffer(UnicodeInputStream* stream)
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: UTF16Buffer(),
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stream_(stream) { }
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virtual ~InputStreamUTF16Buffer() { }
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virtual void PushBack(uc32 ch) {
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stream_->PushBack(ch);
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pos_--;
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}
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virtual uc32 Advance() {
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uc32 result = stream_->Next();
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if (result >= 0) pos_++;
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return result;
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}
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virtual void SeekForward(int pos) {
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// Seeking in the input is not used by preparsing.
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// It's only used by the real parser based on preparser data.
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UNIMPLEMENTED();
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}
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private:
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v8::UnicodeInputStream* const stream_;
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};
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class StandAloneJavaScriptScanner : public JavaScriptScanner {
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public:
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void Initialize(UTF16Buffer* source) {
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source_ = source;
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literal_flags_ = kLiteralString | kLiteralIdentifier;
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Init();
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// Skip initial whitespace allowing HTML comment ends just like
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// after a newline and scan first token.
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has_line_terminator_before_next_ = true;
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SkipWhiteSpace();
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Scan();
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}
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};
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// Functions declared by allocation.h
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void FatalProcessOutOfMemory(const char* reason) {
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V8_Fatal(__FILE__, __LINE__, reason);
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}
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bool EnableSlowAsserts() { return true; }
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} // namespace internal.
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UnicodeInputStream::~UnicodeInputStream() { }
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PreParserData Preparse(UnicodeInputStream* input, size_t max_stack) {
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internal::InputStreamUTF16Buffer buffer(input);
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uintptr_t stack_limit = reinterpret_cast<uintptr_t>(&buffer) - max_stack;
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internal::StandAloneJavaScriptScanner scanner;
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scanner.Initialize(&buffer);
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internal::CompleteParserRecorder recorder;
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preparser::PreParser::PreParseResult result =
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preparser::PreParser::PreParseProgram(&scanner,
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&recorder,
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true,
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stack_limit);
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if (result == preparser::PreParser::kPreParseStackOverflow) {
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return PreParserData::StackOverflow();
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}
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internal::Vector<unsigned> pre_data = recorder.ExtractData();
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size_t size = pre_data.length() * sizeof(pre_data[0]);
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unsigned char* data = reinterpret_cast<unsigned char*>(pre_data.start());
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return PreParserData(size, data);
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}
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} // namespace v8.
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// Used by ASSERT macros and other immediate exits.
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extern "C" void V8_Fatal(const char* file, int line, const char* format, ...) {
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exit(EXIT_FAILURE);
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}
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