977ed18d
 Hu Chunming
提交三方库
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// Boost.Filesystem mbpath.cpp ---------------------------------------------//
// (c) 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 <boost/system/system_error.hpp>
#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
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, boost::system::error_code(EINVAL, boost::system::errno_ecat)));
*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",
boost::system::error_code(EINVAL, boost::system::errno_ecat)));
*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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