1// Copyright (c) 2012 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/cpp/var_array_buffer.h"
6
7#include <limits>
8
9#include "ppapi/c/ppb_var_array_buffer.h"
10#include "ppapi/cpp/logging.h"
11#include "ppapi/cpp/module_impl.h"
12
13namespace pp {
14
15namespace {
16
17template <> const char* interface_name<PPB_VarArrayBuffer_1_0>() {
18  return PPB_VAR_ARRAY_BUFFER_INTERFACE_1_0;
19}
20
21}  // namespace
22
23VarArrayBuffer::VarArrayBuffer() {
24  ConstructWithSize(0);
25}
26
27VarArrayBuffer::VarArrayBuffer(const Var& var) : Var(var) {
28  if (!var.is_array_buffer()) {
29    PP_NOTREACHED();
30    var_ = PP_MakeNull();
31  }
32}
33
34VarArrayBuffer::VarArrayBuffer(uint32_t size_in_bytes) {
35  ConstructWithSize(size_in_bytes);
36}
37
38pp::VarArrayBuffer& VarArrayBuffer::operator=(const VarArrayBuffer& other) {
39  Var::operator=(other);
40  return *this;
41}
42
43pp::Var& VarArrayBuffer::operator=(const Var& other) {
44  if (other.is_array_buffer()) {
45    return Var::operator=(other);
46  } else {
47    PP_NOTREACHED();
48    return *this;
49  }
50}
51
52uint32_t VarArrayBuffer::ByteLength() const {
53  uint32_t byte_length = std::numeric_limits<uint32_t>::max();
54  if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
55    get_interface<PPB_VarArrayBuffer_1_0>()->ByteLength(var_, &byte_length);
56  else
57    PP_NOTREACHED();
58  return byte_length;
59}
60
61void* VarArrayBuffer::Map() {
62  if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
63    return get_interface<PPB_VarArrayBuffer_1_0>()->Map(var_);
64  PP_NOTREACHED();
65  return NULL;
66}
67
68void VarArrayBuffer::Unmap() {
69  if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
70    get_interface<PPB_VarArrayBuffer_1_0>()->Unmap(var_);
71  else
72    PP_NOTREACHED();
73}
74
75
76void VarArrayBuffer::ConstructWithSize(uint32_t size_in_bytes) {
77  PP_DCHECK(is_undefined());
78
79  if (has_interface<PPB_VarArrayBuffer_1_0>()) {
80    var_ = get_interface<PPB_VarArrayBuffer_1_0>()->Create(size_in_bytes);
81  } else {
82    PP_NOTREACHED();
83    var_ = PP_MakeNull();
84  }
85  is_managed_ = true;
86}
87
88}  // namespace pp
89