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56 lines
2.6 KiB
56 lines
2.6 KiB
4 months ago
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// Copyright (C) 2020 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <inttypes.h>
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#include <android-base/endian.h>
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// The utilities in android-base/endian.h still require the use of regular int
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// types to store values with any endianness, which requires the user to
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// remember to manually do the required conversions, which is prone to errors.
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// The types introduced here allow handling these values safely.
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namespace cuttlefish {
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#define DECLARE_TYPE(new_type, base_type, to_new, to_base) \
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class new_type { \
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public: \
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new_type() = default; \
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explicit new_type(base_type val) : inner_(to_new(val)) {} \
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new_type(const new_type&) = default; \
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new_type& operator=(const new_type& other) = default; \
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volatile new_type& operator=(const new_type& other) volatile { \
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inner_ = other.inner_; \
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return *this; \
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} \
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base_type as_##base_type() const volatile { return to_base(inner_); } \
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\
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private: \
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base_type inner_; \
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}; \
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static_assert(sizeof(new_type) == sizeof(base_type))
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DECLARE_TYPE(Le16, uint16_t, htole16, le16toh);
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DECLARE_TYPE(Le32, uint32_t, htole32, le32toh);
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DECLARE_TYPE(Le64, uint64_t, htole64, le64toh);
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DECLARE_TYPE(Be16, uint16_t, htobe16, be16toh);
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DECLARE_TYPE(Be32, uint32_t, htobe32, be32toh);
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DECLARE_TYPE(Be64, uint64_t, htobe64, be64toh);
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#undef DECLARE_TYPE
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} // namespace cuttlefish
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