stabilize build system: depends, installer, boost/bdb fixes, cross targets groundwork
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// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
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// (C) Copyright 2003-2007 Jonathan Turkanis
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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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// See http://www.boost.org/libs/iostreams for documentation.
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// Contains the definition of the template codecvt_helper, useful for
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// defining specializations of std::codecvt where state_type != mbstate_t.
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// Compensates for the fact that some standard library implementations
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// do not derive the primiary codecvt template from locale::facet or
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// provide the correct member types and functions.
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// Usage:
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//
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// // In global namespace:
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// BOOST_IOSTREAMS_CODECVT_SPEC(mystate)
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//
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// // In user namespace:
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// template<typename Intern, typename Extern>
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// struct mycodecvt : codecvt_helper<Intern, Extern, State> { ... };
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//
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// // Or:
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// struct mycodecvt : codecvt_helper<wchar_t, char, State> { ... };
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//
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// Etc.
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#ifndef BOOST_IOSTREAMS_DETAIL_CODECVT_HELPER_HPP_INCLUDED
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#define BOOST_IOSTREAMS_DETAIL_CODECVT_HELPER_HPP_INCLUDED
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#include <boost/config.hpp> // Put size_t in std, BOOST_MSVC, Dinkum.
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#include <boost/detail/workaround.hpp>
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#include <algorithm> // min.
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#include <cstddef> // size_t.
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#include <locale> // locale, codecvt_base, codecvt.
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#include <boost/iostreams/detail/config/codecvt.hpp>
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//------------------Definition of traits--------------------------------------//
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namespace boost { namespace iostreams { namespace detail {
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#if !BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, == 1) //-----------------------//
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template<typename T>
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struct codecvt_intern { typedef typename T::intern_type type; };
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template<typename T>
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struct codecvt_extern { typedef typename T::extern_type type; };
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#else // #if !BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, == 1) //--------------//
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template<typename T>
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struct codecvt_intern { typedef typename T::from_type type; };
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template<typename T>
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struct codecvt_extern { typedef typename T::to_type type; };
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#endif // #if !BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, == 1) //-------------//
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template<typename T>
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struct codecvt_state { typedef typename T::state_type type; };
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} } } // End namespaces detail, iostreams, boost.
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//------------------Definition of codecvt_impl--------------------------------//
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#if defined(BOOST_IOSTREAMS_NO_PRIMARY_CODECVT_DEFINITION) || \
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defined(BOOST_IOSTREAMS_EMPTY_PRIMARY_CODECVT_DEFINITION) || \
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defined(BOOST_IOSTREAMS_NO_LOCALE) \
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/**/
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namespace boost { namespace iostreams { namespace detail {
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template<typename Intern, typename Extern, typename State>
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struct codecvt_impl : std::locale::facet, std::codecvt_base {
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public:
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typedef Intern intern_type;
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typedef Extern extern_type;
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typedef State state_type;
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codecvt_impl(std::size_t refs = 0) : std::locale::facet(refs) { }
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std::codecvt_base::result
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in( State& state, const Extern* first1, const Extern* last1,
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const Extern*& next1, Intern* first2, Intern* last2,
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Intern*& next2 ) const
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{
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return do_in(state, first1, last1, next1, first2, last2, next2);
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}
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std::codecvt_base::result
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out( State& state, const Intern* first1, const Intern* last1,
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const Intern*& next1, Extern* first2, Extern* last2,
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Extern*& next2 ) const
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{
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return do_out(state, first1, last1, next1, first2, last2, next2);
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}
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std::codecvt_base::result
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unshift(State& state, Extern* first2, Extern* last2, Extern*& next2) const
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{
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return do_unshift(state, first2, last2, next2);
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}
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bool always_noconv() const throw() { return do_always_noconv(); }
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int max_length() const throw() { return do_max_length(); }
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int encoding() const throw() { return do_encoding(); }
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int length( BOOST_IOSTREAMS_CODECVT_CV_QUALIFIER State& state,
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const Extern* first1, const Extern* last1,
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std::size_t len2 ) const throw()
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{
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return do_length(state, first1, last1, len2);
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}
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protected:
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std::codecvt_base::result
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virtual do_in( State&, const Extern*, const Extern*, const Extern*&,
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Intern*, Intern*, Intern*& ) const
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{
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return std::codecvt_base::noconv;
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}
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std::codecvt_base::result
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virtual do_out( State&, const Intern*, const Intern*, const Intern*&,
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Extern*, Extern*, Extern*& ) const
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{
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return std::codecvt_base::noconv;
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}
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std::codecvt_base::result
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virtual do_unshift(State&, Extern*, Extern*, Extern*&) const
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{
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return std::codecvt_base::ok;
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}
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virtual bool do_always_noconv() const throw() { return true; }
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virtual int do_max_length() const throw() { return 1; }
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virtual int do_encoding() const throw() { return 1; }
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virtual int do_length( BOOST_IOSTREAMS_CODECVT_CV_QUALIFIER State&,
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const Extern* first1, const Extern* last1,
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std::size_t len2 ) const throw()
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{
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return (std::min)(static_cast<std::size_t>(last1 - first1), len2);
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}
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};
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} } } // End namespaces detail, iostreams, boost.
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#endif // no primary codecvt definition, empty definition.
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//------------------Definition of BOOST_IOSTREAMS_CODECVT_SPEC----------------//
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#if defined(BOOST_IOSTREAMS_NO_PRIMARY_CODECVT_DEFINITION) || \
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defined(BOOST_IOSTREAMS_EMPTY_PRIMARY_CODECVT_DEFINITION) \
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/**/
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# define BOOST_IOSTREAMS_CODECVT_SPEC(state) \
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namespace std { \
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template<typename Intern, typename Extern> \
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class codecvt<Intern, Extern, state> \
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: public ::boost::iostreams::detail::codecvt_impl< \
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Intern, Extern, state \
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> \
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{ \
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public: \
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codecvt(std::size_t refs = 0) \
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: ::boost::iostreams::detail::codecvt_impl< \
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Intern, Extern, state \
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>(refs) \
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{ } \
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static std::locale::id id; \
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}; \
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template<typename Intern, typename Extern> \
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std::locale::id codecvt<Intern, Extern, state>::id; \
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} \
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/**/
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#else
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# define BOOST_IOSTREAMS_CODECVT_SPEC(state)
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#endif // no primary codecvt definition, or empty definition.
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namespace boost { namespace iostreams { namespace detail {
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//------------------Definition of codecvt_helper------------------------------//
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template<typename Intern, typename Extern, typename State>
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struct codecvt_helper : std::codecvt<Intern, Extern, State> {
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typedef Intern intern_type;
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typedef Extern extern_type;
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typedef State state_type;
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codecvt_helper(std::size_t refs = 0)
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#if !defined(BOOST_IOSTREAMS_NO_CODECVT_CTOR_FROM_SIZE_T)
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: std::codecvt<Intern, Extern, State>(refs)
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#else
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: std::codecvt<Intern, Extern, State>()
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#endif
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{ }
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#ifdef BOOST_IOSTREAMS_NO_CODECVT_MAX_LENGTH
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int max_length() const throw() { return do_max_length(); }
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protected:
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virtual int do_max_length() const throw() { return 1; }
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#endif
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};
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} } } // End namespaces detail, iostreams, boost.
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#endif // #ifndef BOOST_IOSTREAMS_DETAIL_CODECVT_HELPER_HPP_INCLUDED
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