Expose JSON parser through V8 API

src/api.cc

 // Copyright 2012 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
@@ skipping 28 matching lines @@
 #include "conversions-inl.h"
 #include "counters.h"
 #include "cpu-profiler.h"
 #include "debug.h"
 #include "deoptimizer.h"
 #include "execution.h"
 #include "global-handles.h"
 #include "heap-profiler.h"
 #include "heap-snapshot-generator-inl.h"
 #include "icu_util.h"
+#include "json-parser.h"
 #include "messages.h"
 #ifdef COMPRESS_STARTUP_DATA_BZ2
 #include "natives.h"
 #endif
 #include "parser.h"
 #include "platform.h"
 #include "profile-generator-inl.h"
 #include "property-details.h"
 #include "property.h"
 #include "runtime.h"
@@ skipping 2541 matching lines @@
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   if (IsDeadCheck(isolate, "v8::StackFrame::IsConstructor()")) return false;
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   i::Handle<i::JSObject> self = Utils::OpenHandle(this);
   i::Handle<i::Object> is_constructor = GetProperty(self, "isConstructor");
   return is_constructor->IsTrue();
 }
 
 
+// --- J S O N ---
+
+Local<Object> JSON::Parse(Local<String> json_string) {
+  i::Isolate* isolate = i::Isolate::Current();
+  EnsureInitializedForIsolate(isolate, "v8::JSON::Parse");
+  ENTER_V8(isolate);
+  i::HandleScope scope(isolate);
+  i::Handle<i::String> source = i::Handle<i::String>(
+      Utils::OpenHandle(*json_string)->TryFlattenGetString());

[Yang, 2013/08/05 10:52:35]

I would prefer FlattenGetString here. While you are at it, please change it for
Runtime_ParseJson as well.

+  EXCEPTION_PREAMBLE(isolate);
+  i::Handle<i::Object> result;
+  if (source->IsSeqOneByteString()) {
+    result = i::JsonParser<true>::Parse(source);
+  } else {
+    result = i::JsonParser<false>::Parse(source);
+  }
+  has_pending_exception = result.is_null();
+  EXCEPTION_BAILOUT_CHECK(isolate, Local<Object>());
+  return Utils::ToLocal(
+      i::Handle<i::JSObject>::cast(scope.CloseAndEscape(result)));
+}
+
+
 // --- D a t a ---
 
 bool Value::FullIsUndefined() const {
   if (IsDeadCheck(i::Isolate::Current(), "v8::Value::IsUndefined()")) {
     return false;
   }
   bool result = Utils::OpenHandle(this)->IsUndefined();
   ASSERT_EQ(result, QuickIsUndefined());
   return result;
 }
@@ skipping 5516 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   return callback(info);
 }
 
 
 } }  // namespace v8::internal