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// 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 "third_party/blink/renderer/platform/mojo/string16_mojom_traits.h"
#include <cstring>
#include "base/containers/span.h"
#include "mojo/public/cpp/base/big_buffer.h"
#include "mojo/public/cpp/base/big_buffer_mojom_traits.h"
namespace mojo {
// static
void* StructTraits<mojo_base::mojom::String16DataView,
WTF::String>::SetUpContext(const WTF::String& input) {
// If it is null (i.e., StructTraits<>::IsNull() returns true), this method is
// guaranteed not to be called.
DCHECK(!input.IsNull());
if (!input.Is8Bit())
return nullptr;
return new base::string16(input.Characters8(),
input.Characters8() + input.length());
}
// static
void StructTraits<mojo_base::mojom::String16DataView,
WTF::String>::TearDownContext(const WTF::String& input,
void* context) {
delete static_cast<base::string16*>(context);
}
// static
base::span<const uint16_t>
StructTraits<mojo_base::mojom::String16DataView, WTF::String>::data(
const WTF::String& input,
void* context) {
auto* contextObject = static_cast<base::string16*>(context);
DCHECK_EQ(input.Is8Bit(), !!contextObject);
if (contextObject) {
return base::make_span(
reinterpret_cast<const uint16_t*>(contextObject->data()),
contextObject->size());
}
return base::make_span(
reinterpret_cast<const uint16_t*>(input.Characters16()), input.length());
}
// static
bool StructTraits<mojo_base::mojom::String16DataView, WTF::String>::Read(
mojo_base::mojom::String16DataView data,
WTF::String* out) {
ArrayDataView<uint16_t> view;
data.GetDataDataView(&view);
*out = WTF::String(reinterpret_cast<const UChar*>(view.data()), view.size());
return true;
}
// static
mojo_base::BigBuffer StructTraits<mojo_base::mojom::BigString16DataView,
WTF::String>::data(const WTF::String& input) {
if (input.Is8Bit()) {
base::string16 input16(input.Characters8(),
input.Characters8() + input.length());
return mojo_base::BigBuffer(
base::make_span(reinterpret_cast<const uint8_t*>(input16.data()),
input16.size() * sizeof(UChar)));
}
return mojo_base::BigBuffer(
base::make_span(reinterpret_cast<const uint8_t*>(input.Characters16()),
input.length() * sizeof(UChar)));
}
// static
bool StructTraits<mojo_base::mojom::BigString16DataView, WTF::String>::Read(
mojo_base::mojom::BigString16DataView data,
WTF::String* out) {
mojo_base::BigBuffer buffer;
if (!data.ReadData(&buffer))
return false;
size_t size = buffer.size();
if (size % sizeof(UChar))
return false;
// An empty |mojo_base::BigBuffer| may have a null |data()| if empty.
if (!size) {
*out = g_empty_string;
} else {
*out = WTF::String(reinterpret_cast<const UChar*>(buffer.data()),
size / sizeof(UChar));
}
return true;
}
} // namespace mojo
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