First cut at API for ES6 ArrayBuffers

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 34 matching lines @@
 #include "heap-snapshot-generator-inl.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"
 #include "runtime-profiler.h"
 #include "scanner-character-streams.h"
 #include "snapshot.h"
 #include "unicode-inl.h"
 #include "v8threads.h"
 #include "version.h"
 #include "vm-state-inl.h"
 
 
 #define LOG_API(isolate, expr) LOG(isolate, ApiEntryCall(expr))
@@ skipping 2682 matching lines @@
 
 void v8::Array::CheckCast(Value* that) {
   if (IsDeadCheck(i::Isolate::Current(), "v8::Array::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsJSArray(),
            "v8::Array::Cast()",
            "Could not convert to array");
 }
 
 
+void v8::ArrayBuffer::CheckCast(Value* that) {
+  if (IsDeadCheck(i::Isolate::Current(), "v8::ArrayBuffer::Cast()")) return;
+  i::Handle<i::Object> obj = Utils::OpenHandle(that);
+  ApiCheck(obj->IsJSArrayBuffer(),
+           "v8::ArrayBuffer::Cast()",
+           "Could not convert to ArrayBuffer");
+}
+
+
 void v8::Date::CheckCast(v8::Value* that) {
   i::Isolate* isolate = i::Isolate::Current();
   if (IsDeadCheck(isolate, "v8::Date::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->HasSpecificClassOf(isolate->heap()->Date_string()),
            "v8::Date::Cast()",
            "Could not convert to date");
 }
 
 
@@ skipping 3017 matching lines @@
   }
   i::Handle<i::JSObject> paragon_handle(i::JSObject::cast(paragon));
   EXCEPTION_PREAMBLE(isolate);
   ENTER_V8(isolate);
   i::Handle<i::JSObject> result = i::Copy(paragon_handle);
   has_pending_exception = result.is_null();
   EXCEPTION_BAILOUT_CHECK(isolate, Local<Object>());
   return Utils::ToLocal(result);
 }
 
+size_t v8::ArrayBuffer::ByteLength() const {
+  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
+  if (IsDeadCheck(isolate, "v8::ArrayBuffer::ByteLength()")) return 0;
+  i::Handle<i::JSArrayBuffer> obj = Utils::OpenHandle(this);
+  i::Object* byte_length = obj->byte_length();
+  if (byte_length->IsSmi()) {
+    return i::Smi::cast(byte_length)->value();

[rossberg, 2013/04/25 11:00:55]

The case distinction shouldn't be needed, it's done by Object::Number.

[Dmitry Lomov (no reviews), 2013/04/25 11:48:01]

Done.

+  } else {
+    return static_cast<size_t>(byte_length->Number());
+  }
+}
+
+void* v8::ArrayBuffer::Data() const {
+  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
+  if (IsDeadCheck(isolate, "v8::ArrayBuffer::Data()")) return 0;
+  i::Handle<i::JSArrayBuffer> obj = Utils::OpenHandle(this);
+  return obj->backing_store();
+}
+
+
+Local<ArrayBuffer> v8::ArrayBuffer::New(size_t byte_length) {
+  i::Isolate* isolate = i::Isolate::Current();
+  EnsureInitializedForIsolate(isolate, "v8::ArrayBuffer::New(size_t)");
+  LOG_API(isolate, "v8::ArrayBuffer::New(size_t)");
+  ENTER_V8(isolate);
+  i::Handle<i::JSArrayBuffer> obj =
+      isolate->factory()->NewJSArrayBuffer();
+  i::Runtime::AllocateAndSetupArrayBuffer(isolate, obj, byte_length);
+  return Utils::ToLocal(obj);
+}
+
+
+Local<ArrayBuffer> v8::ArrayBuffer::New(void* data, size_t byte_length) {
+  i::Isolate* isolate = i::Isolate::Current();
+  EnsureInitializedForIsolate(isolate, "v8::ArrayBuffer::New(void*, size_t)");
+  LOG_API(isolate, "v8::ArrayBuffer::New(void*, size_t)");
+  ENTER_V8(isolate);
+  i::Handle<i::JSArrayBuffer> obj =
+      isolate->factory()->NewJSArrayBuffer();
+  i::Runtime::SetupArrayBuffer(isolate, obj, data, byte_length);
+  return Utils::ToLocal(obj);
+}
+
 
 Local<Symbol> v8::Symbol::New(Isolate* isolate) {
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
   EnsureInitializedForIsolate(i_isolate, "v8::Symbol::New()");
   LOG_API(i_isolate, "Symbol::New()");
   ENTER_V8(i_isolate);
   i::Handle<i::Symbol> result = i_isolate->factory()->NewSymbol();
   return Utils::ToLocal(result);
 }
 
@@ skipping 1630 matching lines @@
 
   v->VisitPointers(blocks_.first(), first_block_limit_);
 
   for (int i = 1; i < blocks_.length(); i++) {
     v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]);
   }
 }
 
 
 } }  // namespace v8::internal