[libc-commits] [libc] [libc][windows] implement unistd/rmdir (PR #123742)

[Sirui Mu via libc-commits]

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@@ -0,0 +1,134 @@
+//===------------- Convert Win32 Error to POSIX ---------------------------===//
+//
+// 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 LLVM_LIBC_SRC___SUPPORT_OSUTIL_WINDOWS_WINERROR_H
+#define LLVM_LIBC_SRC___SUPPORT_OSUTIL_WINDOWS_WINERROR_H
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <winerror.h>
+
+#include "hdr/errno_macros.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LIBC_INLINE constexpr int map_win_error_to_errno(DWORD error) {
+  // Translation based on
+  // https://github.com/llvm/llvm-project/blob/2b26ee6e790574e05c3c9a562bc37897daf0f384/libcxx/src/system_error.cpp
+
+  // For the relation between errc and errno, see:
+  // https://en.cppreference.com/w/cpp/error/errc
+  switch (error) {
+  case ERROR_ACCESS_DENIED:
+    return EPERM;
+  case ERROR_ALREADY_EXISTS:
+    return EEXIST;
+  case ERROR_BAD_NETPATH:
+    return ENOENT;
+  case ERROR_BAD_PATHNAME:
+    return ENOENT;
+  case ERROR_BAD_UNIT:
+    return ENODEV;
+  case ERROR_BROKEN_PIPE:
+    return EPIPE;
+  case ERROR_BUFFER_OVERFLOW:
+    return ENAMETOOLONG;
+  case ERROR_BUSY:
+    return EBUSY;
+  case ERROR_BUSY_DRIVE:
+    return EBUSY;
+  case ERROR_CANNOT_MAKE:
+    return EPERM;
+  case ERROR_CANTOPEN:
+    return EIO;
+  case ERROR_CANTREAD:
+    return EIO;
+  case ERROR_CANTWRITE:
+    return EIO;
+  case ERROR_CURRENT_DIRECTORY:
+    return EPERM;
+  case ERROR_DEV_NOT_EXIST:
+    return ENODEV;
+  case ERROR_DEVICE_IN_USE:
+    return EBUSY;
+  case ERROR_DIR_NOT_EMPTY:
+    return ENOTEMPTY;
+  case ERROR_DIRECTORY:
+    return EINVAL;
+  case ERROR_DISK_FULL:
+    return ENOSPC;
+  case ERROR_FILE_EXISTS:
+    return EEXIST;
+  case ERROR_FILE_NOT_FOUND:
+    return ENOENT;
+  case ERROR_HANDLE_DISK_FULL:
+    return ENOSPC;
+  case ERROR_INVALID_ACCESS:
+    return EPERM;
+  case ERROR_INVALID_DRIVE:
+    return ENODEV;
+  case ERROR_INVALID_FUNCTION:
+    return ENOSYS;
+  case ERROR_INVALID_HANDLE:
+    return EINVAL;
+  case ERROR_INVALID_NAME:
+    return ENOENT;
+  case ERROR_INVALID_PARAMETER:
+    return EINVAL;
+  case ERROR_LOCK_VIOLATION:
+    return ENOLCK;
+  case ERROR_LOCKED:
+    return ENOLCK;
+  case ERROR_NEGATIVE_SEEK:
+    return EINVAL;
+  case ERROR_NOACCESS:
+    return EPERM;
+  case ERROR_NOT_ENOUGH_MEMORY:
+    return ENOMEM;
+  case ERROR_NOT_READY:
+    return EAGAIN;
+  case ERROR_NOT_SAME_DEVICE:
+    return EXDEV;
+  case ERROR_NOT_SUPPORTED:
+    return ENOTSUP;
+  case ERROR_OPEN_FAILED:
+    return EIO;
+  case ERROR_OPEN_FILES:
+    return EBUSY;
+  case ERROR_OPERATION_ABORTED:
+    return ECANCELED;
+  case ERROR_OUTOFMEMORY:
+    return ENOMEM;
+  case ERROR_PATH_NOT_FOUND:
+    return ENOENT;
+  case ERROR_READ_FAULT:
+    return EIO;
+  case ERROR_REPARSE_TAG_INVALID:
+    return EINVAL;
+  case ERROR_RETRY:
+    return EAGAIN;
+  case ERROR_SEEK:
+    return EIO;
+  case ERROR_SHARING_VIOLATION:
+    return EPERM;
+  case ERROR_TOO_MANY_OPEN_FILES:
+    return EMFILE;
+  case ERROR_WRITE_FAULT:
+    return EIO;
+  case ERROR_WRITE_PROTECT:
+    return EPERM;
+  default:
+    // For unrecognized errno, default to ENOSYS
+    return ENOTSUP;
----------------
Lancern wrote:

`ENOSYS` or `ENOTSUP`?

https://github.com/llvm/llvm-project/pull/123742