src/runtime/runtime-symbol.cc

// Copyright 2014 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/runtime/runtime-utils.h"

#include "src/arguments.h"
#include "src/isolate-inl.h"
#include "src/objects-inl.h"
#include "src/string-builder.h"

namespace v8 {
namespace internal {

RUNTIME_FUNCTION(Runtime_CreateSymbol) {
  HandleScope scope(isolate);
  DCHECK(args.length() == 1);
  CONVERT_ARG_HANDLE_CHECKED(Object, name, 0);
  RUNTIME_ASSERT(name->IsString() || name->IsUndefined());
  Handle<Symbol> symbol = isolate->factory()->NewSymbol();
  if (name->IsString()) symbol->set_name(*name);
  return *symbol;
}


RUNTIME_FUNCTION(Runtime_CreatePrivateSymbol) {
  HandleScope scope(isolate);
  DCHECK(args.length() == 1);
  CONVERT_ARG_HANDLE_CHECKED(Object, name, 0);
  RUNTIME_ASSERT(name->IsString() || name->IsUndefined());
  Handle<Symbol> symbol = isolate->factory()->NewPrivateSymbol();
  if (name->IsString()) symbol->set_name(*name);
  return *symbol;
}


RUNTIME_FUNCTION(Runtime_SymbolDescription) {
  SealHandleScope shs(isolate);
  DCHECK(args.length() == 1);
  CONVERT_ARG_CHECKED(Symbol, symbol, 0);
  return symbol->name();
}


RUNTIME_FUNCTION(Runtime_SymbolDescriptiveString) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
  CONVERT_ARG_HANDLE_CHECKED(Symbol, symbol, 0);
  IncrementalStringBuilder builder(isolate);
  builder.AppendCString("Symbol(");
  if (symbol->name()->IsString()) {
    builder.AppendString(handle(String::cast(symbol->name()), isolate));
  }
  builder.AppendCharacter(')');
  Handle<String> result;
  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, builder.Finish());
  return *result;
}


RUNTIME_FUNCTION(Runtime_SymbolRegistry) {
  HandleScope scope(isolate);
  DCHECK(args.length() == 0);
  return *isolate->GetSymbolRegistry();
}


RUNTIME_FUNCTION(Runtime_SymbolIsPrivate) {
  SealHandleScope shs(isolate);
  DCHECK(args.length() == 1);
  CONVERT_ARG_CHECKED(Symbol, symbol, 0);
  return isolate->heap()->ToBoolean(symbol->is_private());
}
}  // namespace internal
}  // namespace v8