Expose JSON parser through V8 API

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 60627a39710443b4aef0b17ab570af6a1cc6c4bd..4c53977e707e101de372676770d77d4516e83c55 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -46,6 +46,7 @@
 #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"
@@ -2607,6 +2608,29 @@ bool StackFrame::IsConstructor() const {
 }
 
 
+// --- 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 {