boost/beast/core/detail/win32_unicode_path.hpp
//
// Copyright (c) 2019 Mika Fischer (mika.fischer@zoopnet.de)
//
// Distributed under 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)
//
// Official repository: https://github.com/boostorg/beast
//
#ifndef BOOST_BEAST_CORE_DETAIL_WIN32_UNICODE_PATH_HPP
#define BOOST_BEAST_CORE_DETAIL_WIN32_UNICODE_PATH_HPP
#ifdef _WIN32
#include <boost/config.hpp>
#include <boost/beast/core/error.hpp>
#include <boost/winapi/character_code_conversion.hpp>
#include <boost/winapi/file_management.hpp>
#include <boost/winapi/get_last_error.hpp>
#include <array>
#include <vector>
namespace boost {
namespace beast {
namespace detail {
class win32_unicode_path
{
using WCHAR_ = boost::winapi::WCHAR_;
public:
win32_unicode_path(const char* utf8_path, error_code& ec) {
int ret = mb2wide(utf8_path, static_buf_.data(),
static_buf_.size());
if (ret == 0)
{
int sz = mb2wide(utf8_path, nullptr, 0);
if (sz == 0)
{
ec.assign(boost::winapi::GetLastError(),
system_category());
return;
}
dynamic_buf_.resize(sz);
int ret2 = mb2wide(utf8_path,
dynamic_buf_.data(),
dynamic_buf_.size());
if (ret2 == 0)
{
ec.assign(boost::winapi::GetLastError(),
system_category());
return;
}
}
}
WCHAR_ const* c_str() const noexcept
{
return dynamic_buf_.empty()
? static_buf_.data()
: dynamic_buf_.data();
}
private:
int mb2wide(const char* utf8_path, WCHAR_* buf, size_t sz)
{
return boost::winapi::MultiByteToWideChar(
boost::winapi::CP_UTF8_,
boost::winapi::MB_ERR_INVALID_CHARS_,
utf8_path, -1,
buf, static_cast<int>(sz));
}
std::array<WCHAR_, boost::winapi::MAX_PATH_> static_buf_;
std::vector<WCHAR_> dynamic_buf_;
};
} // detail
} // beast
} // boost
#endif
#endif