v1/__filesystem/u8path.h

0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef _LIBCPP___FILESYSTEM_U8PATH_H
0011 #define _LIBCPP___FILESYSTEM_U8PATH_H
0012
0013 #include <__algorithm/unwrap_iter.h>
0014 #include <__config>
0015 #include <__filesystem/path.h>
0016 #include <string>
0017
0018 // Only required on Windows for __widen_from_utf8, and included conservatively
0019 // because it requires support for localization.
0020 #if defined(_LIBCPP_WIN32API)
0021 #  include <locale>
0022 #endif
0023
0024 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0025 #  pragma GCC system_header
0026 #endif
0027
0028 #if _LIBCPP_STD_VER >= 17
0029
0030 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
0031
0032 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_PUSH
0033
0034 template <class _InputIt, __enable_if_t<__is_pathable<_InputIt>::value, int> = 0>
0035 _LIBCPP_HIDE_FROM_ABI _LIBCPP_DEPRECATED_WITH_CHAR8_T path u8path(_InputIt __f, _InputIt __l) {
0036   static_assert(
0037 #  if _LIBCPP_HAS_CHAR8_T
0038       is_same<typename __is_pathable<_InputIt>::__char_type, char8_t>::value ||
0039 #  endif
0040           is_same<typename __is_pathable<_InputIt>::__char_type, char>::value,
0041       "u8path(Iter, Iter) requires Iter have a value_type of type 'char'"
0042       " or 'char8_t'");
0043 #  if defined(_LIBCPP_WIN32API)
0044   string __tmp(__f, __l);
0045   using _CVT = __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__>;
0046   std::wstring __w;
0047   __w.reserve(__tmp.size());
0048   _CVT()(back_inserter(__w), __tmp.data(), __tmp.data() + __tmp.size());
0049   return path(__w);
0050 #  else
0051   return path(__f, __l);
0052 #  endif /* !_LIBCPP_WIN32API */
0053 }
0054
0055 #  if defined(_LIBCPP_WIN32API)
0056 template <class _InputIt, __enable_if_t<__is_pathable<_InputIt>::value, int> = 0>
0057 _LIBCPP_HIDE_FROM_ABI _LIBCPP_DEPRECATED_WITH_CHAR8_T path u8path(_InputIt __f, _NullSentinel) {
0058   static_assert(
0059 #    if _LIBCPP_HAS_CHAR8_T
0060       is_same<typename __is_pathable<_InputIt>::__char_type, char8_t>::value ||
0061 #    endif
0062           is_same<typename __is_pathable<_InputIt>::__char_type, char>::value,
0063       "u8path(Iter, Iter) requires Iter have a value_type of type 'char'"
0064       " or 'char8_t'");
0065   string __tmp;
0066   const char __sentinel = char{};
0067   for (; *__f != __sentinel; ++__f)
0068     __tmp.push_back(*__f);
0069   using _CVT = __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__>;
0070   std::wstring __w;
0071   __w.reserve(__tmp.size());
0072   _CVT()(back_inserter(__w), __tmp.data(), __tmp.data() + __tmp.size());
0073   return path(__w);
0074 }
0075 #  endif /* _LIBCPP_WIN32API */
0076
0077 template <class _Source, __enable_if_t<__is_pathable<_Source>::value, int> = 0>
0078 _LIBCPP_HIDE_FROM_ABI _LIBCPP_DEPRECATED_WITH_CHAR8_T path u8path(const _Source& __s) {
0079   static_assert(
0080 #  if _LIBCPP_HAS_CHAR8_T
0081       is_same<typename __is_pathable<_Source>::__char_type, char8_t>::value ||
0082 #  endif
0083           is_same<typename __is_pathable<_Source>::__char_type, char>::value,
0084       "u8path(Source const&) requires Source have a character type of type "
0085       "'char' or 'char8_t'");
0086 #  if defined(_LIBCPP_WIN32API)
0087   using _Traits = __is_pathable<_Source>;
0088   return u8path(std::__unwrap_iter(_Traits::__range_begin(__s)), std::__unwrap_iter(_Traits::__range_end(__s)));
0089 #  else
0090   return path(__s);
0091 #  endif
0092 }
0093
0094 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_POP
0095
0096 _LIBCPP_END_NAMESPACE_FILESYSTEM
0097
0098 #endif // _LIBCPP_STD_VER >= 17
0099
0100 #endif // _LIBCPP___FILESYSTEM_U8PATH_H