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94 lines
3.6 KiB
C++
94 lines
3.6 KiB
C++
// Copyright (c) 2022, The Monero Project
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include <string>
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#include <system_error>
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#include "byte_stream.h"
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#include "serialization/wire/json/fwd.h"
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#include "span.h"
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//! Declare functions that convert `type` to/from json bytes
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#define WIRE_JSON_DECLARE_CONVERSION(type) \
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std::error_code convert_from_json(::epee::span<const char>, type&); \
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std::error_code convert_to_json(std::string&, const type&) \
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//! Declare functions that convert `type::request` and `type::response` to/from json bytes
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#define WIRE_JSON_DECLARE_COMMAND(type) \
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WIRE_JSON_DECLARE_CONVERSION(type::request); \
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WIRE_JSON_DECLARE_CONVERSION(type::response)
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namespace wire
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{
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struct json
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{
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using input_type = json_reader;
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using output_type = json_string_writer;
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//! Only enabled if `T` has templated method `from_bytes`.
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template<typename T>
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static auto from_bytes(const epee::span<const char> source, T& dest) -> decltype(dest.template from_bytes<input_type>(source))
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{
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return dest.template from_bytes<input_type>(source);
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}
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//! Only enabled if `T` has templated method `to_bytes`.
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template<typename T>
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static auto to_bytes(std::string& dest, const T& source) -> decltype(source.template to_bytes<output_type>(dest))
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{
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return source.template to_bytes<output_type>(dest);
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}
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// Parameters packs have lower precedence; above functions are preferred.
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template<typename... T>
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static std::error_code from_bytes(const epee::span<const char> source, T&... dest)
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{
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return convert_from_json(source, dest...); // ADL (searches every associated namespace)
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}
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template<typename... T>
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static std::error_code to_bytes(std::string& dest, const T&... source)
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{
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return convert_to_json(dest, source...); // ADL (searches every associated namespace)
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}
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template<typename T>
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static std::error_code to_bytes(epee::byte_stream& dest, const T& source)
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{
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std::string buf{};
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const std::error_code error = to_bytes(buf, source);
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if (!error)
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dest.write(epee::to_span(buf));
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return error;
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}
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};
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}
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