peerplays_migrated/libraries/chain/assert_evaluator.cpp

/*
 * Copyright (c) 2015 Cryptonomex, Inc., and contributors.
 * 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. Any modified source or binaries are used only with the BitShares network.
 *
 * 2. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *
 * 3. 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.
 *
 * 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.
 *
 */

#include <graphene/chain/assert_evaluator.hpp>
#include <graphene/chain/block_summary_object.hpp>
#include <graphene/chain/database.hpp>

#include <sstream>

namespace graphene { namespace chain {

struct predicate_evaluator
{
   typedef void result_type;
   const database& db;

   predicate_evaluator( const database& d ):db(d){}

   void operator()( const  account_name_eq_lit_predicate& p )const
   {
      FC_ASSERT( p.account_id(db).name == p.name );
   }
   void operator()( const  asset_symbol_eq_lit_predicate& p )const
   {
      FC_ASSERT( p.asset_id(db).symbol == p.symbol );
   }
   void operator()( const block_id_predicate& p )const
   {
      FC_ASSERT( block_summary_id_type( block_header::num_from_id( p.id ) & 0xffff )(db).block_id == p.id );
   }
};

void_result assert_evaluator::do_evaluate( const assert_operation& o )
{ try {
   const database& _db = db();
   uint32_t skip = _db.get_node_properties().skip_flags;
   auto max_predicate_opcode = _db.get_global_properties().parameters.max_predicate_opcode;

   if( skip & database::skip_assert_evaluation )
      return void_result();

   for( const auto& p : o.predicates )
   {
      FC_ASSERT( p.which() >= 0 );
      FC_ASSERT( unsigned(p.which()) < max_predicate_opcode );
      p.visit( predicate_evaluator( _db ) );
   }
   return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }

void_result assert_evaluator::do_apply( const assert_operation& o )
{ try {
   // assert_operation is always a no-op
   return void_result();
} FC_CAPTURE_AND_RETHROW( (o) ) }

} } // graphene::chain