| // Copyright (c) 2001-2008 Hartmut Kaiser |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| #if !defined(BOOST_SPIRIT_KARMA_PADDING_MAY_06_2008_0436PM) |
| #define BOOST_SPIRIT_KARMA_PADDING_MAY_06_2008_0436PM |
| |
| #include <boost/lexical_cast.hpp> |
| |
| #include <boost/spirit/home/karma/domain.hpp> |
| #include <boost/spirit/home/karma/delimit.hpp> |
| #include <boost/spirit/home/support/unused.hpp> |
| #include <boost/fusion/include/at.hpp> |
| #include <boost/spirit/home/karma/detail/generate_to.hpp> |
| |
| namespace boost { namespace spirit { namespace karma |
| { |
| struct binary_padding_director |
| { |
| template <typename Component, typename Context, typename Unused> |
| struct attribute |
| { |
| typedef unused_type type; |
| }; |
| |
| template <typename Component, typename OutputIterator, |
| typename Context, typename Delimiter, typename Parameter> |
| static bool |
| generate(Component const& component, OutputIterator& sink, |
| Context& ctx, Delimiter const& d, Parameter const&) |
| { |
| std::size_t padbytes = fusion::at_c<0>(component.elements); |
| std::size_t count = sink.get_out_count() % padbytes; |
| |
| if (count) |
| count = padbytes - count; |
| |
| bool result = true; |
| while (result && count-- != 0) |
| result = detail::generate_to(sink, 0); |
| |
| karma::delimit(sink, d); // always do post-delimiting |
| return result; |
| } |
| |
| template <typename Component, typename Context> |
| static std::string what(Component const& component, Context const& ctx) |
| { |
| return std::string("pad(") + |
| boost::lexical_cast<std::string>( |
| fusion::at_c<0>(component.elements)) + |
| ")"; |
| } |
| }; |
| |
| }}} |
| |
| #endif |