// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___FILESYSTEM_PERMS_H
#define _LIBCPP___FILESYSTEM_PERMS_H

#include <__availability>
#include <__config>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

#ifndef _LIBCPP_CXX03_LANG

_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM

_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH

// On Windows, these permission bits map to one single readonly flag per
// file, and the executable bit is always returned as set. When setting
// permissions, as long as the write bit is set for either owner, group or
// others, the readonly flag is cleared.
enum class _LIBCPP_ENUM_VIS perms : unsigned {
  none = 0,

  owner_read = 0400,
  owner_write = 0200,
  owner_exec = 0100,
  owner_all = 0700,

  group_read = 040,
  group_write = 020,
  group_exec = 010,
  group_all = 070,

  others_read = 04,
  others_write = 02,
  others_exec = 01,
  others_all = 07,

  all = 0777,

  set_uid = 04000,
  set_gid = 02000,
  sticky_bit = 01000,
  mask = 07777,
  unknown = 0xFFFF,
};

_LIBCPP_INLINE_VISIBILITY
inline constexpr perms operator&(perms _LHS, perms _RHS) {
  return static_cast<perms>(static_cast<unsigned>(_LHS) &
                            static_cast<unsigned>(_RHS));
}

_LIBCPP_INLINE_VISIBILITY
inline constexpr perms operator|(perms _LHS, perms _RHS) {
  return static_cast<perms>(static_cast<unsigned>(_LHS) |
                            static_cast<unsigned>(_RHS));
}

_LIBCPP_INLINE_VISIBILITY
inline constexpr perms operator^(perms _LHS, perms _RHS) {
  return static_cast<perms>(static_cast<unsigned>(_LHS) ^
                            static_cast<unsigned>(_RHS));
}

_LIBCPP_INLINE_VISIBILITY
inline constexpr perms operator~(perms _LHS) {
  return static_cast<perms>(~static_cast<unsigned>(_LHS));
}

_LIBCPP_INLINE_VISIBILITY
inline perms& operator&=(perms& _LHS, perms _RHS) { return _LHS = _LHS & _RHS; }

_LIBCPP_INLINE_VISIBILITY
inline perms& operator|=(perms& _LHS, perms _RHS) { return _LHS = _LHS | _RHS; }

_LIBCPP_INLINE_VISIBILITY
inline perms& operator^=(perms& _LHS, perms _RHS) { return _LHS = _LHS ^ _RHS; }

_LIBCPP_AVAILABILITY_FILESYSTEM_POP

_LIBCPP_END_NAMESPACE_FILESYSTEM

#endif // _LIBCPP_CXX03_LANG

#endif // _LIBCPP___FILESYSTEM_PERMS_H