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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "mojo/public/cpp/base/big_buffer_mojom_traits.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "mojo/public/cpp/bindings/array_data_view.h"
namespace mojo {
// static
uint32_t StructTraits<mojo_base::mojom::BigBufferSharedMemoryRegionDataView,
mojo_base::internal::BigBufferSharedMemoryRegion>::
size(const mojo_base::internal::BigBufferSharedMemoryRegion& region) {
return base::checked_cast<uint32_t>(region.size());
}
// static
ScopedSharedBufferHandle
StructTraits<mojo_base::mojom::BigBufferSharedMemoryRegionDataView,
mojo_base::internal::BigBufferSharedMemoryRegion>::
buffer_handle(mojo_base::internal::BigBufferSharedMemoryRegion& region) {
return region.TakeBufferHandle();
}
// static
bool StructTraits<mojo_base::mojom::BigBufferSharedMemoryRegionDataView,
mojo_base::internal::BigBufferSharedMemoryRegion>::
Read(mojo_base::mojom::BigBufferSharedMemoryRegionDataView data,
mojo_base::internal::BigBufferSharedMemoryRegion* out) {
*out = mojo_base::internal::BigBufferSharedMemoryRegion(
data.TakeBufferHandle(), data.size());
return out->memory() != nullptr;
}
// static
mojo_base::mojom::BigBufferDataView::Tag
UnionTraits<mojo_base::mojom::BigBufferDataView, mojo_base::BigBuffer>::GetTag(
const mojo_base::BigBuffer& buffer) {
switch (buffer.storage_type()) {
case mojo_base::BigBuffer::StorageType::kBytes:
return mojo_base::mojom::BigBufferDataView::Tag::kBytes;
case mojo_base::BigBuffer::StorageType::kSharedMemory:
return mojo_base::mojom::BigBufferDataView::Tag::kSharedMemory;
case mojo_base::BigBuffer::StorageType::kInvalidBuffer:
return mojo_base::mojom::BigBufferDataView::Tag::kInvalidBuffer;
}
NOTREACHED();
}
// static
base::span<const uint8_t>
UnionTraits<mojo_base::mojom::BigBufferDataView, mojo_base::BigBuffer>::bytes(
const mojo_base::BigBuffer& buffer) {
return buffer.byte_span();
}
// static
mojo_base::internal::BigBufferSharedMemoryRegion&
UnionTraits<mojo_base::mojom::BigBufferDataView,
mojo_base::BigBuffer>::shared_memory(mojo_base::BigBuffer& buffer) {
return buffer.shared_memory();
}
// static
bool UnionTraits<mojo_base::mojom::BigBufferDataView,
mojo_base::BigBuffer>::invalid_buffer(mojo_base::BigBuffer&
buffer) {
return true;
}
// static
bool UnionTraits<mojo_base::mojom::BigBufferDataView, mojo_base::BigBuffer>::
Read(mojo_base::mojom::BigBufferDataView data, mojo_base::BigBuffer* out) {
switch (data.tag()) {
case mojo_base::mojom::BigBufferDataView::Tag::kBytes: {
mojo::ArrayDataView<uint8_t> bytes_view;
data.GetBytesDataView(&bytes_view);
*out = mojo_base::BigBuffer(bytes_view);
return true;
}
case mojo_base::mojom::BigBufferDataView::Tag::kSharedMemory: {
mojo_base::internal::BigBufferSharedMemoryRegion shared_memory;
if (!data.ReadSharedMemory(&shared_memory))
return false;
*out = mojo_base::BigBuffer(std::move(shared_memory));
return true;
}
case mojo_base::mojom::BigBufferDataView::Tag::kInvalidBuffer:
// Always reject an invalid buffer in deserialization.
return false;
}
return false;
}
// static
mojo_base::mojom::BigBufferDataView::Tag UnionTraits<
mojo_base::mojom::BigBufferDataView,
mojo_base::BigBufferView>::GetTag(const mojo_base::BigBufferView& view) {
switch (view.storage_type()) {
case mojo_base::BigBuffer::StorageType::kBytes:
return mojo_base::mojom::BigBufferDataView::Tag::kBytes;
case mojo_base::BigBuffer::StorageType::kSharedMemory:
return mojo_base::mojom::BigBufferDataView::Tag::kSharedMemory;
case mojo_base::BigBuffer::StorageType::kInvalidBuffer:
return mojo_base::mojom::BigBufferDataView::Tag::kInvalidBuffer;
}
NOTREACHED();
}
// static
base::span<const uint8_t> UnionTraits<
mojo_base::mojom::BigBufferDataView,
mojo_base::BigBufferView>::bytes(const mojo_base::BigBufferView& view) {
return view.bytes();
}
// static
mojo_base::internal::BigBufferSharedMemoryRegion& UnionTraits<
mojo_base::mojom::BigBufferDataView,
mojo_base::BigBufferView>::shared_memory(mojo_base::BigBufferView& view) {
return view.shared_memory();
}
// static
bool UnionTraits<mojo_base::mojom::BigBufferDataView,
mojo_base::BigBufferView>::
invalid_buffer(mojo_base::BigBufferView& buffer) {
return true;
}
// static
bool UnionTraits<
mojo_base::mojom::BigBufferDataView,
mojo_base::BigBufferView>::Read(mojo_base::mojom::BigBufferDataView data,
mojo_base::BigBufferView* out) {
switch (data.tag()) {
case mojo_base::mojom::BigBufferDataView::Tag::kBytes: {
mojo::ArrayDataView<uint8_t> bytes_view;
data.GetBytesDataView(&bytes_view);
out->SetBytes(bytes_view);
return true;
}
case mojo_base::mojom::BigBufferDataView::Tag::kSharedMemory: {
mojo_base::internal::BigBufferSharedMemoryRegion shared_memory;
if (!data.ReadSharedMemory(&shared_memory))
return false;
out->SetSharedMemory(std::move(shared_memory));
return true;
}
case mojo_base::mojom::BigBufferDataView::Tag::kInvalidBuffer:
// Always reject an invalid buffer in deserialization.
return false;
}
return false;
}
} // namespace mojo
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