79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
// Boost.Filesystem mbpath.cpp ---------------------------------------------//
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// (c) Copyright Beman Dawes 2005
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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 at
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// http://www.boost.org/LICENSE_1_0.txt)
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// See Boost.Filesystem home page at http://www.boost.org/libs/filesystem
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#include <boost/filesystem/config.hpp>
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#ifdef BOOST_FILESYSTEM_NARROW_ONLY
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#error This compiler or standard library does not support wide-character strings or paths
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#endif
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#include "mbpath.hpp"
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#include <boost/system/system_error.hpp>
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#include <boost/scoped_array.hpp>
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namespace fs = boost::filesystem;
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namespace {
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// ISO C calls this "the locale-specific native environment":
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std::locale loc("");
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const std::codecvt< wchar_t, char, std::mbstate_t >*
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cvt(&std::use_facet< std::codecvt< wchar_t, char, std::mbstate_t > >(loc));
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} // namespace
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namespace user {
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mbpath_traits::external_string_type
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mbpath_traits::to_external(const mbpath& ph, const internal_string_type& src)
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{
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std::size_t work_size(cvt->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 (cvt->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< fs::basic_filesystem_error< mbpath > >(
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fs::basic_filesystem_error< mbpath >(
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"user::mbpath::to_external conversion error",
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ph, boost::system::error_code(EINVAL, boost::system::errno_ecat)));
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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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mbpath_traits::internal_string_type
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mbpath_traits::to_internal(const external_string_type& src)
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{
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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 (cvt->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< fs::basic_filesystem_error< mbpath > >(
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fs::basic_filesystem_error< mbpath >(
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"user::mbpath::to_internal conversion error",
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boost::system::error_code(EINVAL, boost::system::errno_ecat)));
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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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void mbpath_traits::imbue(const std::locale& new_loc)
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{
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loc = new_loc;
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cvt = &std::use_facet< std::codecvt< wchar_t, char, std::mbstate_t > >(loc);
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}
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} // namespace user
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