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