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abi_serializer.cpp
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abi_serializer.cpp
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/**
* @file
* @copyright defined in eos/LICENSE.txt
*/
#include <eos/types/abi_serializer.hpp>
#include <fc/io/raw.hpp>
#include <boost/algorithm/string/predicate.hpp>
using namespace boost;
namespace eosio { namespace types {
using boost::algorithm::ends_with;
using std::string;
template <typename T>
inline fc::variant variant_from_stream(fc::datastream<const char*>& stream) {
T temp;
fc::raw::unpack( stream, temp );
return fc::variant(temp);
}
template <typename T>
auto pack_unpack() {
return std::make_pair<abi_serializer::unpack_function, abi_serializer::pack_function>(
[]( fc::datastream<const char*>& stream, bool is_array) -> fc::variant {
if( is_array )
return variant_from_stream<vector<T>>(stream);
return variant_from_stream<T>(stream);
},
[]( const fc::variant& var, fc::datastream<char*>& ds, bool is_array ){
if( is_array )
fc::raw::pack( ds, var.as<vector<T>>() );
else
fc::raw::pack( ds, var.as<T>());
}
);
}
abi_serializer::abi_serializer( const abi& abi ) {
configure_built_in_types();
set_abi(abi);
}
void abi_serializer::configure_built_in_types() {
//public_key.hpp
built_in_types.emplace("public_key", pack_unpack<public_key>());
//asset.hpp
built_in_types.emplace("asset", pack_unpack<asset>());
built_in_types.emplace("price", pack_unpack<price>());
//native.hpp
built_in_types.emplace("string", pack_unpack<string>());
built_in_types.emplace("time", pack_unpack<time>());
built_in_types.emplace("signature", pack_unpack<signature>());
built_in_types.emplace("checksum", pack_unpack<checksum>());
built_in_types.emplace("field_name", pack_unpack<field_name>());
built_in_types.emplace("fixed_string32",pack_unpack<fixed_string32>());
built_in_types.emplace("fixed_string16",pack_unpack<fixed_string16>());
built_in_types.emplace("type_name", pack_unpack<type_name>());
built_in_types.emplace("bytes", pack_unpack<bytes>());
built_in_types.emplace("uint8", pack_unpack<uint8>());
built_in_types.emplace("uint16", pack_unpack<uint16>());
built_in_types.emplace("uint32", pack_unpack<uint32>());
built_in_types.emplace("uint64", pack_unpack<uint64>());
built_in_types.emplace("uint128", pack_unpack<uint128>());
built_in_types.emplace("uint256", pack_unpack<uint256>());
built_in_types.emplace("int8", pack_unpack<int8_t>());
built_in_types.emplace("int16", pack_unpack<int16_t>());
built_in_types.emplace("int32", pack_unpack<int32_t>());
built_in_types.emplace("int64", pack_unpack<int64_t>());
//built_in_types.emplace("int128", pack_unpack<int128>());
//built_in_types.emplace("int256", pack_unpack<int256>());
//built_in_types.emplace("uint128_t", pack_unpack<uint128_t>());
built_in_types.emplace("name", pack_unpack<name>());
built_in_types.emplace("field", pack_unpack<field>());
built_in_types.emplace("struct_t", pack_unpack<struct_t>());
built_in_types.emplace("fields", pack_unpack<fields>());
//generated.hpp
built_in_types.emplace("account_name", pack_unpack<account_name>());
built_in_types.emplace("permission_name", pack_unpack<permission_name>());
built_in_types.emplace("func_name", pack_unpack<func_name>());
built_in_types.emplace("message_name", pack_unpack<message_name>());
//built_in_types.emplace("type_name", pack_unpack<type_name>());
built_in_types.emplace("account_permission", pack_unpack<account_permission>());
built_in_types.emplace("message", pack_unpack<message>());
built_in_types.emplace("account_permission_weight",pack_unpack<account_permission_weight>());
built_in_types.emplace("transaction", pack_unpack<transaction>());
built_in_types.emplace("signed_transaction", pack_unpack<signed_transaction>());
built_in_types.emplace("key_permission_weight", pack_unpack<key_permission_weight>());
built_in_types.emplace("authority", pack_unpack<authority>());
built_in_types.emplace("blockchain_configuration", pack_unpack<blockchain_configuration>());
built_in_types.emplace("type_def", pack_unpack<type_def>());
built_in_types.emplace("action", pack_unpack<action>());
built_in_types.emplace("table", pack_unpack<table>());
built_in_types.emplace("abi", pack_unpack<abi>());
}
void abi_serializer::set_abi(const abi& abi) {
typedefs.clear();
structs.clear();
actions.clear();
tables.clear();
for( const auto& st : abi.structs )
structs[st.name] = st;
for( const auto& td : abi.types ) {
FC_ASSERT(is_type(td.type), "invalid type", ("type",td.type));
typedefs[td.new_type_name] = td.type;
}
for( const auto& a : abi.actions )
actions[a.action_name] = a.type;
for( const auto& t : abi.tables )
tables[t.table_name] = t.type;
/**
* The ABI vector may contain duplicates which would make it
* an invalid ABI
*/
FC_ASSERT( typedefs.size() == abi.types.size() );
FC_ASSERT( structs.size() == abi.structs.size() );
FC_ASSERT( actions.size() == abi.actions.size() );
FC_ASSERT( tables.size() == abi.tables.size() );
}
bool abi_serializer::is_builtin_type(const type_name& type)const {
return built_in_types.find(type) != built_in_types.end();
}
bool abi_serializer::is_integer(const type_name& type) const {
string stype = type;
return boost::starts_with(stype, "uint") || boost::starts_with(stype, "int");
}
int abi_serializer::get_integer_size(const type_name& type) const {
string stype = type;
FC_ASSERT( is_integer(type), "${stype} is not an integer type", ("stype",stype));
if( boost::starts_with(stype, "uint") ) {
return boost::lexical_cast<int>(stype.substr(4));
} else {
return boost::lexical_cast<int>(stype.substr(3));
}
}
bool abi_serializer::is_struct(const type_name& type)const {
return structs.find(resolve_type(type)) != structs.end();
}
bool abi_serializer::is_array(const type_name& type)const {
return ends_with(string(type), "[]");
}
type_name abi_serializer::array_type(const type_name& type)const {
if( !is_array(type) ) return type;
return type_name(string(type).substr(0, type.size()-2));
}
bool abi_serializer::is_type(const type_name& rtype)const {
auto type = array_type(rtype);
if( built_in_types.find(type) != built_in_types.end() ) return true;
if( typedefs.find(type) != typedefs.end() ) return is_type(typedefs.find(type)->second);
if( structs.find(type) != structs.end() ) return true;
return false;
}
const struct_t& abi_serializer::get_struct(const type_name& type)const {
auto itr = structs.find(resolve_type(type) );
FC_ASSERT( itr != structs.end(), "Unknown struct ${type}", ("type",type) );
return itr->second;
}
void abi_serializer::validate()const {
for( const auto& t : typedefs ) { try {
vector<type_name> types_seen{t.first, t.second};
auto itr = typedefs.find(t.second);
while( itr != typedefs.end() ) {
FC_ASSERT( find(types_seen.begin(), types_seen.end(), itr->second) == types_seen.end(), "Circular reference in type ${type}", ("type",t.first) );
types_seen.emplace_back(itr->second);
itr = typedefs.find(itr->second);
}
} FC_CAPTURE_AND_RETHROW( (t) ) }
for( const auto& t : typedefs ) { try {
FC_ASSERT(is_type(t.second), "", ("type",t.second) );
} FC_CAPTURE_AND_RETHROW( (t) ) }
for( const auto& s : structs ) { try {
if( s.second.base != type_name() ) {
struct_t current = s.second;
vector<type_name> types_seen{current.name};
while( current.base != type_name() ) {
const auto& base = get_struct(current.base); //<-- force struct to inherit from another struct
FC_ASSERT( find(types_seen.begin(), types_seen.end(), base.name) == types_seen.end(), "Circular reference in struct ${type}", ("type",s.second.name) );
types_seen.emplace_back(base.name);
current = base;
}
}
for( const auto& field : s.second.fields ) { try {
FC_ASSERT(is_type(field.type) );
} FC_CAPTURE_AND_RETHROW( (field) ) }
} FC_CAPTURE_AND_RETHROW( (s) ) }
for( const auto& a : actions ) { try {
FC_ASSERT(is_type(a.second), "", ("type",a.second) );
} FC_CAPTURE_AND_RETHROW( (a) ) }
for( const auto& t : tables ) { try {
FC_ASSERT(is_type(t.second), "", ("type",t.second) );
} FC_CAPTURE_AND_RETHROW( (t) ) }
}
type_name abi_serializer::resolve_type(const type_name& type)const {
auto itr = typedefs.find(type);
if( itr != typedefs.end() )
return resolve_type(itr->second);
return type;
}
void abi_serializer::binary_to_variant(const type_name& type, fc::datastream<const char *>& stream,
fc::mutable_variant_object& obj)const {
const auto& st = get_struct(type);
if( st.base != type_name() ) {
binary_to_variant(resolve_type(st.base), stream, obj);
}
for( const auto& field : st.fields ) {
obj( field.name, binary_to_variant(resolve_type(field.type), stream) );
}
}
fc::variant abi_serializer::binary_to_variant(const type_name& type, fc::datastream<const char *>& stream)const
{
type_name rtype = resolve_type(type);
auto btype = built_in_types.find(array_type(rtype) );
if( btype != built_in_types.end() ) {
return btype->second.first(stream, is_array(rtype));
}
fc::mutable_variant_object mvo;
binary_to_variant(rtype, stream, mvo);
return fc::variant( std::move(mvo) );
}
fc::variant abi_serializer::binary_to_variant(const type_name& type, const bytes& binary)const{
fc::datastream<const char*> ds( binary.data(), binary.size() );
return binary_to_variant(type, ds);
}
void abi_serializer::variant_to_binary(const type_name& type, const fc::variant& var, fc::datastream<char *>& ds)const
{ try {
auto rtype = resolve_type(type);
auto btype = built_in_types.find(array_type(rtype));
if( btype != built_in_types.end() ) {
btype->second.second(var, ds, is_array(rtype));
} else {
const auto& st = get_struct(rtype);
const auto& vo = var.get_object();
if( st.base != type_name() ) {
variant_to_binary(resolve_type(st.base), var, ds);
}
for( const auto& field : st.fields ) {
if( vo.contains( string(field.name).c_str() ) ) {
variant_to_binary(field.type, vo[field.name], ds);
}
else {
/// TODO: default construct field and write it out
FC_ASSERT( !"missing field in variant object", "Missing '${f}' in variant object", ("f",field.name) );
}
}
}
} FC_CAPTURE_AND_RETHROW( (type)(var) ) }
bytes abi_serializer::variant_to_binary(const type_name& type, const fc::variant& var)const {
if( !is_type(type) ) {
return var.as<bytes>();
}
bytes temp( 1024*1024 );
fc::datastream<char*> ds(temp.data(), temp.size() );
variant_to_binary(type, var, ds);
temp.resize(ds.tellp());
return temp;
}
type_name abi_serializer::get_action_type(name action)const {
auto itr = actions.find(action);
if( itr != actions.end() ) return itr->second;
return type_name();
}
type_name abi_serializer::get_table_type(name action)const {
auto itr = tables.find(action);
if( itr != tables.end() ) return itr->second;
return type_name();
}
} }