mirror of
https://github.com/geode-sdk/geode.git
synced 2024-12-04 13:11:09 -05:00
88 lines
2.4 KiB
C++
Executable file
88 lines
2.4 KiB
C++
Executable file
// Copyright (c) 2021-2022 Dr. Colin Hirsch and Daniel Frey
|
|
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
|
|
|
|
#ifndef TAO_PEGTL_CONTRIB_LIMIT_BYTES_HPP
|
|
#define TAO_PEGTL_CONTRIB_LIMIT_BYTES_HPP
|
|
|
|
#include <algorithm>
|
|
|
|
#include "../apply_mode.hpp"
|
|
#include "../config.hpp"
|
|
#include "../match.hpp"
|
|
#include "../nothing.hpp"
|
|
#include "../rewind_mode.hpp"
|
|
|
|
#if defined( __cpp_exceptions )
|
|
#include "../parse_error.hpp"
|
|
#else
|
|
#include <cstdio>
|
|
#include <exception>
|
|
#endif
|
|
|
|
namespace TAO_PEGTL_NAMESPACE
|
|
{
|
|
namespace internal
|
|
{
|
|
template< std::size_t Maximum, typename MemoryInput >
|
|
struct [[nodiscard]] bytes_guard
|
|
{
|
|
MemoryInput& m_in;
|
|
const char* m_end;
|
|
|
|
explicit bytes_guard( MemoryInput& in_in ) noexcept
|
|
: m_in( in_in ),
|
|
m_end( in_in.end() )
|
|
{
|
|
m_in.private_set_end( m_in.begin() + std::min( m_in.size(), Maximum ) );
|
|
}
|
|
|
|
bytes_guard( bytes_guard&& ) = delete;
|
|
bytes_guard( const bytes_guard& ) = delete;
|
|
|
|
~bytes_guard()
|
|
{
|
|
m_in.private_set_end( m_end );
|
|
}
|
|
|
|
bytes_guard& operator=( bytes_guard&& ) = delete;
|
|
bytes_guard& operator=( const bytes_guard& ) = delete;
|
|
};
|
|
|
|
// C++17 does not allow for partial deduction guides.
|
|
|
|
} // namespace internal
|
|
|
|
template< std::size_t Maximum >
|
|
struct limit_bytes
|
|
: maybe_nothing
|
|
{
|
|
template< typename Rule,
|
|
apply_mode A,
|
|
rewind_mode M,
|
|
template< typename... >
|
|
class Action,
|
|
template< typename... >
|
|
class Control,
|
|
typename ParseInput,
|
|
typename... States >
|
|
[[nodiscard]] static bool match( ParseInput& in, States&&... st )
|
|
{
|
|
internal::bytes_guard< Maximum, ParseInput > bg( in );
|
|
if( TAO_PEGTL_NAMESPACE::match< Rule, A, M, Action, Control >( in, st... ) ) {
|
|
if( in.empty() && ( bg.m_end != in.current() ) ) {
|
|
#if defined( __cpp_exceptions )
|
|
throw TAO_PEGTL_NAMESPACE::parse_error( "maximum allowed rule consumption reached", in );
|
|
#else
|
|
std::fputs( "maximum allowed rule consumption reached\n", stderr );
|
|
std::terminate();
|
|
#endif
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
};
|
|
|
|
} // namespace TAO_PEGTL_NAMESPACE
|
|
|
|
#endif
|