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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/arguments.h"
#include "src/runtime/runtime-utils.h"
#include "src/v8.h"
namespace v8 {
namespace internal {
RUNTIME_FUNCTION(Runtime_ForInDone) {
SealHandleScope scope(isolate);
DCHECK_EQ(2, args.length());
CONVERT_SMI_ARG_CHECKED(index, 0);
CONVERT_SMI_ARG_CHECKED(length, 1);
DCHECK_LE(0, index);
DCHECK_LE(index, length);
return isolate->heap()->ToBoolean(index == length);
}
RUNTIME_FUNCTION(Runtime_ForInFilter) {
HandleScope scope(isolate);
DCHECK_EQ(2, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
// TODO(turbofan): Fast case for array indices.
Handle<Name> name;
if (!Runtime::ToName(isolate, key).ToHandle(&name)) {
return isolate->heap()->exception();
}
Maybe<bool> result = JSReceiver::HasProperty(receiver, name);
if (!result.IsJust()) return isolate->heap()->exception();
if (result.FromJust()) return *name;
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_ForInNext) {
HandleScope scope(isolate);
DCHECK_EQ(4, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, cache_array, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, cache_type, 2);
CONVERT_SMI_ARG_CHECKED(index, 3);
Handle<Object> key = handle(cache_array->get(index), isolate);
// Don't need filtering if expected map still matches that of the receiver,
// and neither for proxies.
if (receiver->map() == *cache_type || *cache_type == Smi::FromInt(0)) {
return *key;
}
// TODO(turbofan): Fast case for array indices.
Handle<Name> name;
if (!Runtime::ToName(isolate, key).ToHandle(&name)) {
return isolate->heap()->exception();
}
Maybe<bool> result = JSReceiver::HasProperty(receiver, name);
if (!result.IsJust()) return isolate->heap()->exception();
if (result.FromJust()) return *name;
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_ForInStep) {
SealHandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_SMI_ARG_CHECKED(index, 0);
DCHECK_LE(0, index);
DCHECK_LT(index, Smi::kMaxValue);
return Smi::FromInt(index + 1);
}
} // namespace internal
} // namespace v8
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