43 lines
980 B
C++
43 lines
980 B
C++
// Copyright (c) 2016 Dr. Colin Hirsch and Daniel Frey
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// Please see LICENSE for license or visit https://github.com/ColinH/PEGTL/
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#ifndef TAO_CPP_PEGTL_INTERNAL_ISTREAM_READER_HH
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#define TAO_CPP_PEGTL_INTERNAL_ISTREAM_READER_HH
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#include <istream>
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#include "../input_error.hh"
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namespace tao_json_pegtl
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{
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namespace internal
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{
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struct istream_reader
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{
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explicit
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istream_reader( std::istream & s )
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: m_istream( s )
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{ }
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std::size_t operator() ( char * buffer, const std::size_t length )
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{
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m_istream.read( buffer, length );
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if ( const auto r = m_istream.gcount() ) {
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return r;
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}
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if ( m_istream.eof() ) {
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return 0;
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}
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TAO_CPP_PEGTL_THROW_INPUT_ERROR( "error in istream.read()" );
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}
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std::istream & m_istream;
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};
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} // namespace internal
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} // namespace tao_json_pegtl
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#endif
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