libcxx/include/__filesystem/u8path.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef _LIBCPP___FILESYSTEM_U8PATH_H
  11 #define _LIBCPP___FILESYSTEM_U8PATH_H
  12
  13 #include <__algorithm/unwrap_iter.h>
  14 #include <__availability>
  15 #include <__config>
  16 #include <__filesystem/path.h>
  17 #include <string>
  18
  19 // Only required on Windows for __widen_from_utf8, and included conservatively
  20 // because it requires support for localization.
  21 #if defined(_LIBCPP_WIN32API)
  22 # include <locale>
  23 #endif
  24
  25 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  26 #  pragma GCC system_header
  27 #endif
  28
  29 #ifndef _LIBCPP_CXX03_LANG
  30
  31 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
  32
  33 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_PUSH
  34
  35 template <class _InputIt, __enable_if_t<__is_pathable<_InputIt>::value, int> = 0>
  36 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T
  37     path
  38     u8path(_InputIt __f, _InputIt __l) {
  39   static_assert(
  40 #ifndef _LIBCPP_HAS_NO_CHAR8_T
  41       is_same<typename __is_pathable<_InputIt>::__char_type, char8_t>::value ||
  42 #endif
  43       is_same<typename __is_pathable<_InputIt>::__char_type, char>::value,
  44       "u8path(Iter, Iter) requires Iter have a value_type of type 'char'"
  45       " or 'char8_t'");
  46 #if defined(_LIBCPP_WIN32API)
  47   string __tmp(__f, __l);
  48   using _CVT = __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__>;
  49   _VSTD::wstring __w;
  50   __w.reserve(__tmp.size());
  51   _CVT()(back_inserter(__w), __tmp.data(), __tmp.data() + __tmp.size());
  52   return path(__w);
  53 #else
  54   return path(__f, __l);
  55 #endif /* !_LIBCPP_WIN32API */
  56 }
  57
  58 #if defined(_LIBCPP_WIN32API)
  59 template <class _InputIt, __enable_if_t<__is_pathable<_InputIt>::value, int> = 0>
  60 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T
  61     path
  62     u8path(_InputIt __f, _NullSentinel) {
  63   static_assert(
  64 #ifndef _LIBCPP_HAS_NO_CHAR8_T
  65       is_same<typename __is_pathable<_InputIt>::__char_type, char8_t>::value ||
  66 #endif
  67       is_same<typename __is_pathable<_InputIt>::__char_type, char>::value,
  68       "u8path(Iter, Iter) requires Iter have a value_type of type 'char'"
  69       " or 'char8_t'");
  70   string __tmp;
  71   const char __sentinel = char{};
  72   for (; *__f != __sentinel; ++__f)
  73     __tmp.push_back(*__f);
  74   using _CVT = __widen_from_utf8<sizeof(wchar_t) * __CHAR_BIT__>;
  75   _VSTD::wstring __w;
  76   __w.reserve(__tmp.size());
  77   _CVT()(back_inserter(__w), __tmp.data(), __tmp.data() + __tmp.size());
  78   return path(__w);
  79 }
  80 #endif /* _LIBCPP_WIN32API */
  81
  82 template <class _Source, __enable_if_t<__is_pathable<_Source>::value, int> = 0>
  83 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_WITH_CHAR8_T
  84     path
  85     u8path(const _Source& __s) {
  86   static_assert(
  87 #ifndef _LIBCPP_HAS_NO_CHAR8_T
  88       is_same<typename __is_pathable<_Source>::__char_type, char8_t>::value ||
  89 #endif
  90       is_same<typename __is_pathable<_Source>::__char_type, char>::value,
  91       "u8path(Source const&) requires Source have a character type of type "
  92       "'char' or 'char8_t'");
  93 #if defined(_LIBCPP_WIN32API)
  94   using _Traits = __is_pathable<_Source>;
  95   return u8path(_VSTD::__unwrap_iter(_Traits::__range_begin(__s)), _VSTD::__unwrap_iter(_Traits::__range_end(__s)));
  96 #else
  97   return path(__s);
  98 #endif
  99 }
 100
 101 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_POP
 102
 103 _LIBCPP_END_NAMESPACE_FILESYSTEM
 104
 105 #endif // _LIBCPP_CXX03_LANG
 106
 107 #endif // _LIBCPP___FILESYSTEM_U8PATH_H