Buffers.cpp 3.0 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495
  1. /*
  2. * Copyright (c) 2023, Shannon Booth <shannon@serenityos.org>
  3. * Copyright (c) 2023, Matthew Olsson <mattco@serenityos.org>
  4. *
  5. * SPDX-License-Identifier: BSD-2-Clause
  6. */
  7. #include <LibJS/Runtime/DataView.h>
  8. #include <LibJS/Runtime/TypedArray.h>
  9. #include <LibWeb/WebIDL/Buffers.h>
  10. namespace Web::WebIDL {
  11. GC_DEFINE_ALLOCATOR(BufferableObjectBase);
  12. GC_DEFINE_ALLOCATOR(ArrayBufferView);
  13. GC_DEFINE_ALLOCATOR(BufferSource);
  14. u32 BufferableObjectBase::byte_length() const
  15. {
  16. return m_bufferable_object.visit(
  17. [](GC::Ref<JS::TypedArrayBase> typed_array) {
  18. auto typed_array_record = JS::make_typed_array_with_buffer_witness_record(typed_array, JS::ArrayBuffer::Order::SeqCst);
  19. return JS::typed_array_byte_length(typed_array_record);
  20. },
  21. [](GC::Ref<JS::DataView> data_view) {
  22. auto view_record = JS::make_data_view_with_buffer_witness_record(data_view, JS::ArrayBuffer::Order::SeqCst);
  23. return JS::get_view_byte_length(view_record);
  24. },
  25. [](GC::Ref<JS::ArrayBuffer> array_buffer) { return static_cast<u32>(array_buffer->byte_length()); });
  26. }
  27. GC::Ref<JS::Object> BufferableObjectBase::raw_object()
  28. {
  29. return m_bufferable_object.visit([](auto const& obj) -> GC::Ref<JS::Object> { return obj; });
  30. }
  31. GC::Ptr<JS::ArrayBuffer> BufferableObjectBase::viewed_array_buffer()
  32. {
  33. return m_bufferable_object.visit(
  34. [](GC::Ref<JS::ArrayBuffer> array_buffer) -> GC::Ptr<JS::ArrayBuffer> { return array_buffer; },
  35. [](auto const& view) -> GC::Ptr<JS::ArrayBuffer> { return view->viewed_array_buffer(); });
  36. }
  37. BufferableObject BufferableObjectBase::bufferable_object_from_raw_object(GC::Ref<JS::Object> object)
  38. {
  39. if (is<JS::TypedArrayBase>(*object))
  40. return GC::Ref { static_cast<JS::TypedArrayBase&>(*object) };
  41. if (is<JS::DataView>(*object))
  42. return GC::Ref { static_cast<JS::DataView&>(*object) };
  43. if (is<JS::ArrayBuffer>(*object))
  44. return GC::Ref { static_cast<JS::ArrayBuffer&>(*object) };
  45. VERIFY_NOT_REACHED();
  46. }
  47. BufferableObjectBase::BufferableObjectBase(GC::Ref<JS::Object> object)
  48. : m_bufferable_object(bufferable_object_from_raw_object(object))
  49. {
  50. }
  51. bool BufferableObjectBase::is_typed_array_base() const
  52. {
  53. return m_bufferable_object.has<GC::Ref<JS::TypedArrayBase>>();
  54. }
  55. bool BufferableObjectBase::is_data_view() const
  56. {
  57. return m_bufferable_object.has<GC::Ref<JS::DataView>>();
  58. }
  59. bool BufferableObjectBase::is_array_buffer() const
  60. {
  61. return m_bufferable_object.has<GC::Ref<JS::ArrayBuffer>>();
  62. }
  63. void BufferableObjectBase::visit_edges(Visitor& visitor)
  64. {
  65. Base::visit_edges(visitor);
  66. m_bufferable_object.visit([&](auto& obj) { visitor.visit(obj); });
  67. }
  68. ArrayBufferView::~ArrayBufferView() = default;
  69. u32 ArrayBufferView::byte_offset() const
  70. {
  71. return m_bufferable_object.visit(
  72. [](GC::Ref<JS::ArrayBuffer>) -> u32 { VERIFY_NOT_REACHED(); },
  73. [](auto& view) -> u32 { return static_cast<u32>(view->byte_offset()); });
  74. }
  75. BufferSource::~BufferSource() = default;
  76. }