mojo/common/common_custom_types_struct_traits.cc

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "mojo/common/common_custom_types_struct_traits.h"

#include <iterator>

namespace mojo {

// static
mojo::ConstCArray<uint16_t>
StructTraits<mojo::common::mojom::String16DataView, base::string16>::data(
    const base::string16& str) {
  return mojo::ConstCArray<uint16_t>(
      str.size(), reinterpret_cast<const uint16_t*>(str.data()));
}

// static
bool StructTraits<mojo::common::mojom::String16DataView, base::string16>::Read(
    mojo::common::mojom::String16DataView data,
    base::string16* out) {
  mojo::ArrayDataView<uint16_t> view;
  data.GetDataDataView(&view);
  if (view.is_null())
    return false;
  out->assign(reinterpret_cast<const base::char16*>(view.data()), view.size());
  return true;
}

// static
const std::vector<uint32_t>&
StructTraits<mojo::common::mojom::VersionDataView, base::Version>::components(
    const base::Version& version) {
  return version.components();
}

// static
bool StructTraits<mojo::common::mojom::VersionDataView, base::Version>::Read(
    mojo::common::mojom::VersionDataView data,
    base::Version* out) {
  std::vector<uint32_t> components;
  if (!data.ReadComponents(&components))
    return false;

  *out = base::Version(base::Version(std::move(components)));
  return out->IsValid();
}

// static
bool StructTraits<mojo::common::mojom::UnguessableTokenDataView,
                  base::UnguessableToken>::
    Read(mojo::common::mojom::UnguessableTokenDataView data,
         base::UnguessableToken* out) {
  uint64_t high = data.high();
  uint64_t low = data.low();

  // Receiving a zeroed UnguessableToken is a security issue.
  if (high == 0 && low == 0)
    return false;

  *out = base::UnguessableToken::Deserialize(high, low);
  return true;
}

}  // namespace mojo