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Contents
// Copyright (c) 2018-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/json/
#ifndef TAO_JSON_EVENTS_LIMIT_NESTING_DEPTH_HPP
#define TAO_JSON_EVENTS_LIMIT_NESTING_DEPTH_HPP
#include <cstddef>
#include <cstdint>
#include <stdexcept>
namespace tao::json::events
{
template< typename Consumer, std::size_t Limit >
class limit_nesting_depth
: public Consumer
{
private:
std::size_t m_depth = 0;
void count_and_limit()
{
if( ++m_depth > Limit ) {
throw std::runtime_error( "nesting depth limit exceeded" );
}
}
public:
using Consumer::Consumer;
void begin_array()
{
count_and_limit();
Consumer::begin_array();
}
void begin_array( const std::size_t size )
{
count_and_limit();
Consumer::begin_array( size );
}
void end_array()
{
Consumer::end_array();
--m_depth;
}
void end_array( const std::size_t size )
{
Consumer::end_array( size );
--m_depth;
}
void begin_object()
{
count_and_limit();
Consumer::begin_object();
}
void begin_object( const std::size_t size )
{
count_and_limit();
Consumer::begin_object( size );
}
void end_object()
{
Consumer::end_object();
--m_depth;
}
void end_object( const std::size_t size )
{
Consumer::end_object( size );
--m_depth;
}
};
} // namespace tao::json::events
#endif
Version data entries
34 entries across 34 versions & 1 rubygems