Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(1239)

Unified Diff: src/preparser-api.cc

Issue 5295004: Preparser extracted into separate files that can be compiled to a library. (Closed)
Patch Set: Cleanup of preparse class. Created 10 years, 1 month ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « src/preparser.cc ('k') | src/scanner.h » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: src/preparser-api.cc
diff --git a/src/preparser-api.cc b/src/preparser-api.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f096e941b704ab29f3516176ea1aa000ed766bd7
--- /dev/null
+++ b/src/preparser-api.cc
@@ -0,0 +1,128 @@
+// 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);
+}
« no previous file with comments | « src/preparser.cc ('k') | src/scanner.h » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698