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fix serialization being different on mac

Browse source 
On Mac, size_t is a distinct type from uint64_t, and some
types (in wallet cache as well as cold/hot wallet transfer
data) use pairs/containers with size_t as fields. Mac would
save those as full size, while other platforms would save
them as varints. Might apply to other platforms where the
types are distinct.

There's a nasty hack for backward compatibility, which can
go after a couple forks.
This commit is contained in:
moneromooo-monero 2021-01-12 18:24:55 +00:00
parent b8f3e44a3f
commit f9b5b521e8
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GPG key ID: 686F07454D6CEFC3
9 changed files with 64 additions and 27 deletions
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9
src/serialization/binary_archive.h
View file

@ -98,7 +98,7 @@ template <>
struct binary_archive<false> : public binary_archive_base<std::istream, false>
{
explicit binary_archive(stream_type &s) : base_type(s) {
explicit binary_archive(stream_type &s) : base_type(s), varint_bug_backward_compatibility_(false) {
stream_type::pos_type pos = stream_.tellg();
stream_.seekg(0, std::ios_base::end);
eof_pos_ = stream_.tellg();
@ -173,8 +173,13 @@ struct binary_archive<false> : public binary_archive_base<std::istream, false>
assert(stream_.tellg() <= eof_pos_);
return eof_pos_ - stream_.tellg();
}
void enable_varint_bug_backward_compatibility() { varint_bug_backward_compatibility_ = true; }
bool varint_bug_backward_compatibility_enabled() const { return varint_bug_backward_compatibility_; }
protected:
std::streamoff eof_pos_;
bool varint_bug_backward_compatibility_;
};
template <>
@ -227,6 +232,8 @@ struct binary_archive<true> : public binary_archive_base<std::ostream, true>
void write_variant_tag(variant_tag_type t) {
serialize_int(t);
}
bool varint_bug_backward_compatibility_enabled() const { return false; }
};
POP_WARNINGS

23
src/serialization/container.h
View file

@ -32,22 +32,27 @@ namespace serialization
{
namespace detail
{
template<typename T>
inline constexpr bool use_container_varint() noexcept
{
return std::is_integral<T>::value && std::is_unsigned<T>::value && sizeof(T) > 1;
}
template <typename Archive, class T>
bool serialize_container_element(Archive& ar, T& e)
typename std::enable_if<!use_container_varint<T>(), bool>::type
serialize_container_element(Archive& ar, T& e)
{
return ::do_serialize(ar, e);
}
template <typename Archive>
bool serialize_container_element(Archive& ar, uint32_t& e)
template<typename Archive, typename T>
typename std::enable_if<use_container_varint<T>(), bool>::type
serialize_container_element(Archive& ar, T& e)
{
ar.serialize_varint(e);
return true;
}
static constexpr const bool previously_varint = std::is_same<uint64_t, T>() || std::is_same<uint32_t, T>();
template <typename Archive>
bool serialize_container_element(Archive& ar, uint64_t& e)
{
if (!previously_varint && ar.varint_bug_backward_compatibility_enabled() && !typename Archive::is_saving())
return ::do_serialize(ar, e);
ar.serialize_varint(e);
return true;
}

2
src/serialization/json_archive.h
View file

@ -84,6 +84,8 @@ struct json_archive_base
void end_variant() { end_object(); }
Stream &stream() { return stream_; }
bool varint_bug_backward_compatibility_enabled() const { return false; }
protected:
void make_indent()
{

19
src/serialization/pair.h
View file

@ -30,21 +30,34 @@
#pragma once
#include <memory>
#include <boost/type_traits/make_unsigned.hpp>
#include "serialization.h"
namespace serialization
{
namespace detail
{
template<typename T>
inline constexpr bool use_pair_varint() noexcept
{
return std::is_integral<T>::value && std::is_unsigned<T>::value && sizeof(T) > 1;
}
template <typename Archive, class T>
bool serialize_pair_element(Archive& ar, T& e)
typename std::enable_if<!use_pair_varint<T>(), bool>::type
serialize_pair_element(Archive& ar, T& e)
{
return ::do_serialize(ar, e);
}
template <typename Archive>
bool serialize_pair_element(Archive& ar, uint64_t& e)
template<typename Archive, typename T>
typename std::enable_if<use_pair_varint<T>(), bool>::type
serialize_pair_element(Archive& ar, T& e)
{
static constexpr const bool previously_varint = std::is_same<uint64_t, T>();
if (!previously_varint && ar.varint_bug_backward_compatibility_enabled() && !typename Archive::is_saving())
return ::do_serialize(ar, e);
ar.serialize_varint(e);
return true;
}