blob: 850908019a14178ee5fee228c1e2e9fbffffd0b2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
// Copyright (c) 2016-2017 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
#ifndef TAOCPP_PEGTL_INCLUDE_INTERNAL_ISTREAM_READER_HPP
#define TAOCPP_PEGTL_INCLUDE_INTERNAL_ISTREAM_READER_HPP
#include <istream>
#include "../config.hpp"
#include "../input_error.hpp"
namespace tao
{
namespace TAOCPP_PEGTL_NAMESPACE
{
namespace internal
{
struct istream_reader
{
explicit istream_reader( std::istream& s ) noexcept
: m_istream( s )
{
}
std::size_t operator()( char* buffer, const std::size_t length )
{
m_istream.read( buffer, std::streamsize( length ) );
if( const auto r = m_istream.gcount() ) {
return std::size_t( r );
}
if( m_istream.eof() ) {
return 0;
}
TAOCPP_PEGTL_THROW_INPUT_ERROR( "error in istream.read()" );
}
std::istream& m_istream;
};
} // namespace internal
} // namespace TAOCPP_PEGTL_NAMESPACE
} // namespace tao
#endif
|
