1// Copyright (c) 2013 The Chromium 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#include "ppapi/shared_impl/array_var.h"
6
7#include <limits>
8
9#include "base/logging.h"
10#include "base/memory/ref_counted.h"
11#include "ppapi/shared_impl/ppapi_globals.h"
12#include "ppapi/shared_impl/var_tracker.h"
13
14namespace ppapi {
15
16ArrayVar::ArrayVar() {}
17
18ArrayVar::~ArrayVar() {}
19
20// static
21ArrayVar* ArrayVar::FromPPVar(const PP_Var& var) {
22  if (var.type != PP_VARTYPE_ARRAY)
23    return NULL;
24
25  scoped_refptr<Var> var_object(
26      PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
27  if (!var_object.get())
28    return NULL;
29  return var_object->AsArrayVar();
30}
31
32ArrayVar* ArrayVar::AsArrayVar() { return this; }
33
34PP_VarType ArrayVar::GetType() const { return PP_VARTYPE_ARRAY; }
35
36PP_Var ArrayVar::Get(uint32_t index) const {
37  if (index >= elements_.size())
38    return PP_MakeUndefined();
39
40  const PP_Var& element = elements_[index].get();
41  if (PpapiGlobals::Get()->GetVarTracker()->AddRefVar(element))
42    return element;
43  else
44    return PP_MakeUndefined();
45}
46
47PP_Bool ArrayVar::Set(uint32_t index, const PP_Var& value) {
48  if (index == std::numeric_limits<uint32_t>::max())
49    return PP_FALSE;
50
51  if (index >= elements_.size()) {
52    // Insert ScopedPPVars of type PP_VARTYPE_UNDEFINED to reach the new size
53    // (index + 1).
54    elements_.resize(index + 1);
55  }
56
57  elements_[index] = value;
58  return PP_TRUE;
59}
60
61uint32_t ArrayVar::GetLength() const {
62  if (elements_.size() > std::numeric_limits<uint32_t>::max()) {
63    CHECK(false);
64    return 0;
65  }
66
67  return static_cast<uint32_t>(elements_.size());
68}
69
70PP_Bool ArrayVar::SetLength(uint32_t length) {
71  // If |length| is larger than the current size, ScopedPPVars of type
72  // PP_VARTYPE_UNDEFINED will be inserted to reach the new length.
73  elements_.resize(length);
74  return PP_TRUE;
75}
76
77}  // namespace ppapi
78