mirror of
https://github.com/geode-sdk/geode.git
synced 2024-12-04 21:21:01 -05:00
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
|
// Copyright (c) 2016-2022 Dr. Colin Hirsch and Daniel Frey
|
||
|
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
|
||
|
|
||
|
#ifndef TAO_PEGTL_INTERNAL_CSTREAM_READER_HPP
|
||
|
#define TAO_PEGTL_INTERNAL_CSTREAM_READER_HPP
|
||
|
|
||
|
#include <cassert>
|
||
|
#include <cstddef>
|
||
|
#include <cstdio>
|
||
|
|
||
|
#if defined( __cpp_exceptions )
|
||
|
#include <system_error>
|
||
|
#else
|
||
|
#include <exception>
|
||
|
#endif
|
||
|
|
||
|
#include "../config.hpp"
|
||
|
|
||
|
namespace TAO_PEGTL_NAMESPACE::internal
|
||
|
{
|
||
|
struct cstream_reader
|
||
|
{
|
||
|
explicit cstream_reader( std::FILE* s ) noexcept
|
||
|
: m_cstream( s )
|
||
|
{
|
||
|
assert( m_cstream != nullptr );
|
||
|
}
|
||
|
|
||
|
[[nodiscard]] std::size_t operator()( char* buffer, const std::size_t length ) const
|
||
|
{
|
||
|
if( const auto r = std::fread( buffer, 1, length, m_cstream ) ) {
|
||
|
return r;
|
||
|
}
|
||
|
if( std::feof( m_cstream ) != 0 ) {
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
// Please contact us if you know how to provoke the following exception.
|
||
|
// The example on cppreference.com doesn't work, at least not on macOS.
|
||
|
|
||
|
// LCOV_EXCL_START
|
||
|
#if defined( __cpp_exceptions )
|
||
|
const auto ec = std::ferror( m_cstream );
|
||
|
assert( ec != 0 );
|
||
|
throw std::system_error( ec, std::system_category(), "std::fread() failed" );
|
||
|
#else
|
||
|
std::fputs( "std::fread() failed\n", stderr );
|
||
|
std::terminate();
|
||
|
#endif
|
||
|
// LCOV_EXCL_STOP
|
||
|
}
|
||
|
|
||
|
std::FILE* m_cstream;
|
||
|
};
|
||
|
|
||
|
} // namespace TAO_PEGTL_NAMESPACE::internal
|
||
|
|
||
|
#endif
|