109 lines
2.9 KiB
C++
109 lines
2.9 KiB
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_EOL_IMPL_HH
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#define TAO_CPP_PEGTL_INTERNAL_EOL_IMPL_HH
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#include <utility>
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#include "../eol_mode.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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using eol_pair = std::pair< bool, std::size_t >;
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template< eol_mode EOL > struct eol_impl;
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template<> struct eol_impl< eol_mode::LF_ONLY >
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{
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template< typename Input >
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static eol_pair match( Input & in )
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{
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eol_pair p = { false, in.size( 1 ) };
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if ( p.second ) {
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if ( in.peek_char() == '\n' ) {
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in.bump_to_next_line();
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p.first = true;
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}
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}
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return p;
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}
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};
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template<> struct eol_impl< eol_mode::CR_ONLY >
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{
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template< typename Input >
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static eol_pair match( Input & in )
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{
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eol_pair p = { false, in.size( 1 ) };
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if ( p.second ) {
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if ( in.peek_char() == '\r' ) {
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in.bump_to_next_line();
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p.first = true;
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}
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}
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return p;
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}
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};
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template<> struct eol_impl< eol_mode::CRLF_ONLY >
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{
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template< typename Input >
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static eol_pair match( Input & in )
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{
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eol_pair p = { false, in.size( 2 ) };
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if ( p.second > 1 ) {
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if ( ( in.peek_char() == '\r' ) && ( in.peek_char( 1 ) == '\n' ) ) {
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in.bump_to_next_line( 2 );
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p.first = true;
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}
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}
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return p;
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}
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};
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template<> struct eol_impl< eol_mode::LF_WITH_CRLF >
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{
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template< typename Input >
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static eol_pair match( Input & in )
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{
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eol_pair p = { false, in.size( 2 ) };
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if ( p.second ) {
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const auto a = in.peek_char();
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if ( a == '\n' ) {
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in.bump_to_next_line();
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p.first = true;
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}
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else if ( ( a == '\r' ) && ( p.second > 1 ) && ( in.peek_char( 1 ) == '\n' ) ) {
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in.bump_to_next_line( 2 );
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p.first = true;
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}
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}
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return p;
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}
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};
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template<> struct eol_impl< eol_mode::CR_WITH_CRLF >
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{
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template< typename Input >
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static eol_pair match( Input & in )
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{
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eol_pair p = { false, in.size( 2 ) };
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if ( p.second ) {
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if ( in.peek_char() == '\r' ) {
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in.bump_to_next_line( 1 + ( ( p.second > 1 ) && ( in.peek_char( 1 ) == '\n' ) ) );
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p.first = true;
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}
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}
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return p;
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}
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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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