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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@14895 a592a061-630c-0410-9148-cb99ea01b6c8
122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
// path.cpp ----------------------------------------------------------------//
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// Copyright 2005 Beman Dawes
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// Use, modification, and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy
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// at http://www.boost.org/LICENSE_1_0.txt)
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// See library home page at http://www.boost.org/libs/filesystem
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//----------------------------------------------------------------------------//
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// define BOOST_FILESYSTEM_SOURCE so that <boost/filesystem/config.hpp> knows
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// the library is being built (possibly exporting rather than importing code)
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#define BOOST_FILESYSTEM_SOURCE
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#include <boost/filesystem/config.hpp>
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#ifndef BOOST_FILESYSTEM_NARROW_ONLY
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#include <boost/filesystem/path.hpp>
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#include <boost/scoped_array.hpp>
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#include <locale>
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#include <cerrno>
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namespace
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{
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// std::locale construction can throw (if LC_MESSAGES is wrong, for example),
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// so a static at function scope is used to ensure that exceptions can be
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// caught. (A previous version was at namespace scope, so initialization
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// occurred before main(), preventing exceptions from being caught.)
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std::locale & loc()
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{
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// ISO C calls this "the locale-specific native environment":
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static std::locale lc("");
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return lc;
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}
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const std::codecvt<wchar_t, char, std::mbstate_t> *&
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converter()
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{
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static const std::codecvt<wchar_t, char, std::mbstate_t> *
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cvtr(
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&std::use_facet<std::codecvt<wchar_t, char, std::mbstate_t> >
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( loc() ) );
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return cvtr;
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}
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bool locked(false);
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} // unnamed namespace
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namespace boost
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{
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namespace filesystem
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{
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bool wpath_traits::imbue( const std::locale & new_loc, const std::nothrow_t & )
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{
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if ( locked ) return false;
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locked = true;
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loc() = new_loc;
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converter() = &std::use_facet
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<std::codecvt<wchar_t, char, std::mbstate_t> >( loc() );
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return true;
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}
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void wpath_traits::imbue( const std::locale & new_loc )
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{
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if ( locked ) boost::throw_exception( filesystem_wpath_error(
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"boost::filesystem::wpath_traits::imbue() after lockdown", 0 ) );
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imbue( new_loc, std::nothrow );
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}
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# ifdef BOOST_POSIX_API
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// Because this is POSIX only code, we don't have to worry about ABI issues
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// described in http://www.boost.org/more/separate_compilation.html
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wpath_traits::external_string_type
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wpath_traits::to_external( const wpath & ph,
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const internal_string_type & src )
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{
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locked = true;
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std::size_t work_size( converter()->max_length() * (src.size()+1) );
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boost::scoped_array<char> work( new char[ work_size ] );
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std::mbstate_t state;
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const internal_string_type::value_type * from_next;
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external_string_type::value_type * to_next;
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if ( converter()->out(
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state, src.c_str(), src.c_str()+src.size(), from_next, work.get(),
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work.get()+work_size, to_next ) != std::codecvt_base::ok )
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boost::throw_exception( boost::filesystem::filesystem_wpath_error(
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"boost::filesystem::wpath::to_external conversion error",
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ph, EINVAL ) );
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*to_next = '\0';
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return external_string_type( work.get() );
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}
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wpath_traits::internal_string_type
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wpath_traits::to_internal( const external_string_type & src )
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{
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locked = true;
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std::size_t work_size( src.size()+1 );
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boost::scoped_array<wchar_t> work( new wchar_t[ work_size ] );
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std::mbstate_t state;
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const external_string_type::value_type * from_next;
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internal_string_type::value_type * to_next;
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if ( converter()->in(
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state, src.c_str(), src.c_str()+src.size(), from_next, work.get(),
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work.get()+work_size, to_next ) != std::codecvt_base::ok )
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boost::throw_exception( boost::filesystem::filesystem_wpath_error(
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"boost::filesystem::wpath::to_internal conversion error", EINVAL ) );
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*to_next = L'\0';
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return internal_string_type( work.get() );
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}
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# endif // BOOST_POSIX_API
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} // namespace filesystem
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} // namespace boost
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#endif // ifndef BOOST_FILESYSTEM_NARROW_ONLY
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