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// Boost.Filesystem mbpath.hpp ---------------------------------------------//
// Copyright Beman Dawes 2005
// Use, modification, and distribution is subject to 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)
// See Boost.Filesystem home page at http://www.boost.org/libs/filesystem
#include <boost/filesystem/config.hpp>
# ifdef BOOST_FILESYSTEM_NARROW_ONLY
# error This compiler or standard library does not support wide-character strings or paths
# endif
#include "mbpath.hpp"
#include <cerrno>
#include <boost/scoped_array.hpp>
namespace fs = boost::filesystem;
namespace
{
// ISO C calls this "the locale-specific native environment":
std::locale loc("");
const std::codecvt<wchar_t, char, std::mbstate_t> *
cvt( &std::use_facet<std::codecvt<wchar_t, char, std::mbstate_t> >
( loc ) );
}
namespace user
{
mbpath_traits::external_string_type
mbpath_traits::to_external( const mbpath & ph,
const internal_string_type & src )
{
std::size_t work_size( cvt->max_length() * (src.size()+1) );
boost::scoped_array<char> work( new char[ work_size ] );
std::mbstate_t state;
const internal_string_type::value_type * from_next;
external_string_type::value_type * to_next;
if ( cvt->out(
state, src.c_str(), src.c_str()+src.size(), from_next, work.get(),
work.get()+work_size, to_next ) != std::codecvt_base::ok )
boost::throw_exception<fs::basic_filesystem_error<mbpath> >(
fs::basic_filesystem_error<mbpath>(
"user::mbpath::to_external conversion error",
ph, EINVAL ) );
*to_next = '\0';
return external_string_type( work.get() );
}
mbpath_traits::internal_string_type
mbpath_traits::to_internal( const external_string_type & src )
{
std::size_t work_size( src.size()+1 );
boost::scoped_array<wchar_t> work( new wchar_t[ work_size ] );
std::mbstate_t state;
const external_string_type::value_type * from_next;
internal_string_type::value_type * to_next;
if ( cvt->in(
state, src.c_str(), src.c_str()+src.size(), from_next, work.get(),
work.get()+work_size, to_next ) != std::codecvt_base::ok )
boost::throw_exception<fs::basic_filesystem_error<mbpath> >(
fs::basic_filesystem_error<mbpath>(
"user::mbpath::to_internal conversion error", EINVAL ) );
*to_next = L'\0';
return internal_string_type( work.get() );
}
void mbpath_traits::imbue( const std::locale & new_loc )
{
loc = new_loc;
cvt = &std::use_facet
<std::codecvt<wchar_t, char, std::mbstate_t> >( loc );
}
} // namespace user
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