/*
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* Copyright Andrey Semashev 2007 - 2015.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file formatters/csv_decorator.hpp
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* \author Andrey Semashev
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* \date 18.11.2012
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*
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* The header contains implementation of a CSV-style character decorator.
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* See: http://en.wikipedia.org/wiki/Comma-separated_values
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*/
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#ifndef BOOST_LOG_EXPRESSIONS_FORMATTERS_CSV_DECORATOR_HPP_INCLUDED_
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#define BOOST_LOG_EXPRESSIONS_FORMATTERS_CSV_DECORATOR_HPP_INCLUDED_
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#include <boost/range/iterator_range_core.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/expressions/formatters/char_decorator.hpp>
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace expressions {
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namespace aux {
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template< typename >
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struct csv_decorator_traits;
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#ifdef BOOST_LOG_USE_CHAR
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template< >
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struct csv_decorator_traits< char >
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{
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static boost::iterator_range< const char* const* > get_patterns()
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{
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static const char* const patterns[] =
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{
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"\""
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};
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return boost::make_iterator_range(patterns);
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}
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static boost::iterator_range< const char* const* > get_replacements()
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{
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static const char* const replacements[] =
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{
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"\"\""
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};
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return boost::make_iterator_range(replacements);
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}
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};
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#endif // BOOST_LOG_USE_CHAR
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#ifdef BOOST_LOG_USE_WCHAR_T
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template< >
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struct csv_decorator_traits< wchar_t >
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{
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static boost::iterator_range< const wchar_t* const* > get_patterns()
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{
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static const wchar_t* const patterns[] =
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{
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L"\""
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};
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return boost::make_iterator_range(patterns);
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}
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static boost::iterator_range< const wchar_t* const* > get_replacements()
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{
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static const wchar_t* const replacements[] =
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{
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L"\"\""
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};
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return boost::make_iterator_range(replacements);
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}
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};
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#endif // BOOST_LOG_USE_WCHAR_T
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template< typename CharT >
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struct csv_decorator_gen
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{
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typedef CharT char_type;
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template< typename SubactorT >
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BOOST_FORCEINLINE char_decorator_actor< SubactorT, pattern_replacer< char_type > > operator[] (SubactorT const& subactor) const
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{
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typedef csv_decorator_traits< char_type > traits_type;
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typedef pattern_replacer< char_type > replacer_type;
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typedef char_decorator_actor< SubactorT, replacer_type > result_type;
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typedef typename result_type::terminal_type terminal_type;
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typename result_type::base_type act = {{ terminal_type(subactor, replacer_type(traits_type::get_patterns(), traits_type::get_replacements())) }};
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return result_type(act);
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}
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};
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} // namespace aux
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/*!
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* CSV-style decorator generator object. The decorator doubles double quotes that may be found
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* in the output. See http://en.wikipedia.org/wiki/Comma-separated_values for more information on
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* the CSV format. The generator provides <tt>operator[]</tt> that can be used to construct
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* the actual decorator. For example:
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*
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* <code>
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* csv_decor[ stream << attr< std::string >("MyAttr") ]
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* </code>
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*
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* For wide-character formatting there is the similar \c wcsv_decor decorator generator object.
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*/
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#ifdef BOOST_LOG_USE_CHAR
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BOOST_INLINE_VARIABLE const aux::csv_decorator_gen< char > csv_decor = {};
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#endif
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#ifdef BOOST_LOG_USE_WCHAR_T
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BOOST_INLINE_VARIABLE const aux::csv_decorator_gen< wchar_t > wcsv_decor = {};
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#endif
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/*!
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* The function creates an CSV-style decorator generator for arbitrary character type.
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*/
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template< typename CharT >
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BOOST_FORCEINLINE aux::csv_decorator_gen< CharT > make_csv_decor()
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{
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return aux::csv_decorator_gen< CharT >();
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}
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} // namespace expressions
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_EXPRESSIONS_FORMATTERS_CSV_DECORATOR_HPP_INCLUDED_
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