| /*============================================================================== |
| Copyright (c) 2001-2011 Joel de Guzman |
| Copyright (c) 2010-2011 Bryce Lelbach |
| |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file BOOST_LICENSE_1_0.rst or copy at http://www.boost.org/LICENSE_1_0.txt) |
| ==============================================================================*/ |
| |
| #if !defined(BOOST_SPIRIT_UTREE_EXAMPLE_UTF8_PARSER_HPP) |
| #define BOOST_SPIRIT_UTREE_EXAMPLE_UTF8_PARSER_HPP |
| |
| #include <string> |
| |
| #include <boost/cstdint.hpp> |
| |
| #include <boost/regex/pending/unicode_iterator.hpp> |
| |
| #include <boost/spirit/include/qi.hpp> |
| #include <boost/spirit/include/phoenix_core.hpp> |
| #include <boost/spirit/include/phoenix_container.hpp> |
| #include <boost/spirit/include/phoenix_statement.hpp> |
| #include <boost/spirit/include/phoenix_operator.hpp> |
| #include <boost/spirit/include/support_utree.hpp> |
| |
| namespace utf8 |
| { |
| |
| namespace qi = boost::spirit::qi; |
| namespace px = boost::phoenix; |
| namespace standard = boost::spirit::standard; |
| |
| using boost::spirit::utree; |
| using boost::spirit::utf8_symbol_type; |
| using boost::spirit::utf8_string_type; |
| using boost::spirit::binary_string_type; |
| |
| typedef boost::uint32_t uchar; |
| |
| struct push_string |
| { |
| template <typename, typename> |
| struct result |
| { |
| typedef void type; |
| }; |
| |
| void operator()(std::string& s, uchar code_point) const |
| { |
| typedef std::back_insert_iterator<std::string> insert_iter; |
| insert_iter out_iter(s); |
| boost::utf8_output_iterator<insert_iter> s_iter(out_iter); |
| *s_iter++ = code_point; |
| } |
| }; |
| |
| struct push_escaped_string |
| { |
| template <typename, typename> |
| struct result |
| { |
| typedef void type; |
| }; |
| |
| void operator()(std::string& s, uchar c) const |
| { |
| switch (c) { |
| case 'b': |
| s += '\b'; |
| break; |
| case 't': |
| s += '\t'; |
| break; |
| case 'n': |
| s += '\n'; |
| break; |
| case 'f': |
| s += '\f'; |
| break; |
| case 'r': |
| s += '\r'; |
| break; |
| case '"': |
| s += '"'; |
| break; |
| case '\\': |
| s += '\\'; |
| break; |
| } |
| } |
| }; |
| |
| template <typename Iterator> |
| struct parser : qi::grammar<Iterator, std::string()> |
| { |
| qi::rule<Iterator, void(std::string&)> |
| escaped; |
| |
| qi::rule<Iterator, std::string()> |
| start; |
| |
| px::function<push_string> |
| push_str; |
| |
| px::function<push_escaped_string> |
| push_esc; |
| |
| parser() : parser::base_type (start) |
| { |
| using standard::char_; |
| using qi::uint_parser; |
| using qi::_val; |
| using qi::_r1; |
| using qi::_1; |
| |
| uint_parser<uchar, 16, 4, 4> hex4; |
| uint_parser<uchar, 16, 8, 8> hex8; |
| |
| escaped |
| = '\\' |
| > ( ('u' > hex4) [push_str(_r1, _1)] |
| | ('U' > hex8) [push_str(_r1, _1)] |
| | char_("btnfr\\\"'") [push_esc(_r1, _1)] |
| ); |
| |
| start |
| = '"' |
| > *(escaped(_val) | (~char_('"')) [_val += _1]) |
| > '"'; |
| |
| escaped.name("escaped_string"); |
| start.name("string"); |
| } |
| }; |
| |
| } // utf8 |
| |
| #endif // BOOST_SPIRIT_UTREE_EXAMPLE_UTF8_PARSER_HPP |
| |