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