Initial working base separated from top-level monero project

src/wire.h

@@ -0,0 +1,77 @@
+// Copyright (c) 2020, The Monero Project
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+#include <algorithm>
+#include <boost/utility/string_ref.hpp>
+#include <iterator>
+#include <type_traits>
+
+#include "common/expect.h" // monero/src
+#include "wire/error.h"
+#include "wire/read.h"
+#include "wire/write.h"
+
+#define WIRE_DEFINE_ENUM(type_, map)                                    \
+  static_assert(std::is_enum<type_>::value, "get_string will fail");    \
+  static_assert(!std::is_signed<type_>::value, "write_bytes will fail"); \
+  const char* get_string(const type_ source) noexcept                   \
+  {                                                                     \
+    using native_type = std::underlying_type<type_>::type;              \
+    const native_type value = native_type(source);                      \
+    if (value < std::end(map) - std::begin(map))                        \
+      return map[value];                                                \
+    return "invalid enum value";                                        \
+  }                                                                     \
+  expect<type_> type_ ## _from_string(const boost::string_ref source) noexcept \
+  {                                                                     \
+    if (const auto elem = std::find(std::begin(map), std::end(map), source)) \
+    {                                                                   \
+      if (elem != std::end(map))                                        \
+        return type_(elem - std::begin(map));                           \
+    }                                                                   \
+    return {::wire::error::schema::enumeration};                        \
+  }                                                                     \
+  void read_bytes(::wire::reader& source, type_& dest)                  \
+  {                                                                     \
+    dest = type_(source.enumeration(map));                              \
+  }                                                                     \
+  void write_bytes(::wire::writer& dest, const type_ source)            \
+  {                                                                     \
+    dest.enumeration(std::size_t(source), map);                         \
+  }
+
+#define WIRE_DEFINE_OBJECT(type, map)                          \
+  void read_bytes(::wire::reader& source, type& dest)          \
+  {                                                            \
+    map(source, dest);                                         \
+  }                                                            \
+  void write_bytes(::wire::writer& dest, const type& source)   \
+  {                                                            \
+    map(dest, source);                                         \
+  }