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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.
#ifndef MOJO_PUBLIC_CPP_BINDINGS_STRING_TRAITS_STRING_PIECE_H_
#define MOJO_PUBLIC_CPP_BINDINGS_STRING_TRAITS_STRING_PIECE_H_
#include "base/strings/string_piece.h"
#include "mojo/public/cpp/bindings/string_traits.h"
namespace mojo {
template <>
struct StringTraits<base::StringPiece> {
static bool IsNull(const base::StringPiece& input) {
// base::StringPiece is always converted to non-null mojom string. We could
// have let StringPiece containing a null data pointer map to null mojom
// string, but StringPiece::empty() returns true in this case. It seems
// confusing to mix the concept of empty and null strings, especially
// because they mean different things in mojom.
return false;
}
static void SetToNull(base::StringPiece* output) {
// Convert null to an "empty" base::StringPiece.
output->set(nullptr, 0);
}
static size_t GetSize(const base::StringPiece& input) { return input.size(); }
static const char* GetData(const base::StringPiece& input) {
return input.data();
}
static bool Read(StringDataView input, base::StringPiece* output) {
output->set(input.storage(), input.size());
return true;
}
};
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_STRING_TRAITS_STRING_PIECE_H_
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