// Copyright (c) 2001-2011 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 | |
#if defined(_MSC_VER) | |
#pragma once | |
#endif | |
#include <boost/spirit/home/support/common_terminals.hpp> | |
#include <boost/spirit/home/support/info.hpp> | |
#include <boost/spirit/home/karma/domain.hpp> | |
#include <boost/spirit/home/karma/meta_compiler.hpp> | |
#include <boost/spirit/home/karma/delimit_out.hpp> | |
#include <boost/spirit/home/karma/auxiliary/lazy.hpp> | |
#include <boost/spirit/home/karma/detail/generate_to.hpp> | |
#include <boost/spirit/home/support/unused.hpp> | |
#include <boost/fusion/include/at.hpp> | |
#include <boost/fusion/include/vector.hpp> | |
/////////////////////////////////////////////////////////////////////////////// | |
namespace boost { namespace spirit | |
{ | |
/////////////////////////////////////////////////////////////////////////// | |
// Enablers | |
/////////////////////////////////////////////////////////////////////////// | |
// enables pad(...) | |
template <typename A0> | |
struct use_terminal<karma::domain | |
, terminal_ex<tag::pad, fusion::vector1<A0> > > | |
: mpl::true_ {}; | |
// enables lazy pad(...) | |
template <> | |
struct use_lazy_terminal<karma::domain, tag::pad, 1> | |
: mpl::true_ {}; | |
}} | |
/////////////////////////////////////////////////////////////////////////////// | |
namespace boost { namespace spirit { namespace karma | |
{ | |
using boost::spirit::pad; | |
using boost::spirit::pad_type; | |
struct binary_padding_generator | |
: primitive_generator<binary_padding_generator> | |
{ | |
typedef mpl::int_<generator_properties::tracking> properties; | |
template <typename Context, typename Unused> | |
struct attribute | |
{ | |
typedef unused_type type; | |
}; | |
binary_padding_generator(int numpadbytes) | |
: numpadbytes_(numpadbytes) | |
{} | |
template < | |
typename OutputIterator, typename Context, typename Delimiter | |
, typename Attribute> | |
bool generate(OutputIterator& sink, Context&, Delimiter const& d | |
, Attribute const& /*attr*/) const | |
{ | |
std::size_t count = sink.get_out_count() % numpadbytes_; | |
if (count) | |
count = numpadbytes_ - count; | |
bool result = true; | |
while (result && count-- != 0) | |
result = detail::generate_to(sink, '\0'); | |
if (result) | |
result = karma::delimit_out(sink, d); // always do post-delimiting | |
return result; | |
} | |
template <typename Context> | |
static info what(Context const& ctx) | |
{ | |
return info("pad"); | |
} | |
int numpadbytes_; | |
}; | |
/////////////////////////////////////////////////////////////////////////// | |
// Generator generators: make_xxx function (objects) | |
/////////////////////////////////////////////////////////////////////////// | |
template <typename Modifiers, typename A0> | |
struct make_primitive< | |
terminal_ex<tag::pad, fusion::vector1<A0> > | |
, Modifiers> | |
{ | |
typedef binary_padding_generator result_type; | |
template <typename Terminal> | |
result_type operator()(Terminal const& term, unused_type) const | |
{ | |
return result_type(fusion::at_c<0>(term.args)); | |
} | |
}; | |
}}} | |
#endif |