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Contents
// Copyright (c) 2018-2022 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/json/
#ifndef TAO_JSON_UTF8_HPP
#define TAO_JSON_UTF8_HPP
#include <tao/pegtl/memory_input.hpp>
#include <tao/pegtl/parse_error.hpp>
#include <tao/pegtl/utf8.hpp>
namespace tao::json
{
enum class utf8_mode : bool
{
check,
trust
};
namespace internal
{
template< typename Input >
bool consume_utf8_impl( Input& in, const std::size_t todo )
{
std::size_t i = 0;
while( i < todo ) {
const auto p = pegtl::internal::peek_utf8::peek( in ).size;
if( ( p == 0 ) || ( ( i += p ) > todo ) ) {
return false;
}
in.bump_in_this_line( p );
}
return true;
}
template< utf8_mode M, typename Input >
void consume_utf8_throws( Input& in, const std::size_t todo )
{
if constexpr( M == utf8_mode::trust ) {
in.bump_in_this_line( todo );
}
else if( !consume_utf8_impl( in, todo ) ) {
throw pegtl::parse_error( "invalid utf8", in );
}
}
inline bool validate_utf8_nothrow( const std::string_view sv ) noexcept
{
pegtl::memory_input in( sv, "validate_utf8" );
return consume_utf8_impl( in, sv.size() );
}
} // namespace internal
} // namespace tao::json
#endif
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7 entries across 7 versions & 1 rubygems