1// Copyright 2018 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_BUILTINS_GROWABLE_FIXED_ARRAY_GEN_H_
6#define V8_BUILTINS_GROWABLE_FIXED_ARRAY_GEN_H_
7
8#include "src/codegen/code-stub-assembler.h"
9
10namespace v8 {
11namespace internal {
12
13
14// Utility class implementing a growable fixed array through CSA.
15class GrowableFixedArray : public CodeStubAssembler {
16 public:
17  explicit GrowableFixedArray(compiler::CodeAssemblerState* state)
18      : CodeStubAssembler(state),
19        var_array_(this),
20        var_length_(this),
21        var_capacity_(this) {
22    var_array_ = EmptyFixedArrayConstant();
23    var_capacity_ = IntPtrConstant(0);
24    var_length_ = IntPtrConstant(0);
25  }
26
27  TNode<IntPtrT> length() const { return var_length_.value(); }
28
29  TVariable<FixedArray>* var_array() { return &var_array_; }
30  TVariable<IntPtrT>* var_length() { return &var_length_; }
31  TVariable<IntPtrT>* var_capacity() { return &var_capacity_; }
32
33  void Push(const TNode<Object> value);
34
35  TNode<FixedArray> ToFixedArray();
36  TNode<JSArray> ToJSArray(const TNode<Context> context);
37
38 private:
39  TNode<IntPtrT> NewCapacity(TNode<IntPtrT> current_capacity);
40
41  // Creates a new array with {new_capacity} and copies the first
42  // {element_count} elements from the current array.
43  TNode<FixedArray> ResizeFixedArray(const TNode<IntPtrT> element_count,
44                                     const TNode<IntPtrT> new_capacity);
45
46 private:
47  TVariable<FixedArray> var_array_;
48  TVariable<IntPtrT> var_length_;
49  TVariable<IntPtrT> var_capacity_;
50};
51
52}  // namespace internal
53}  // namespace v8
54
55#endif  // V8_BUILTINS_GROWABLE_FIXED_ARRAY_GEN_H_
56