llvm/lib/Support/WindowsError.cpp

//===-- WindowsError.cpp - Support for mapping windows errors to posix-----===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file implements a mapping from windows errors to posix ones.
//  The standard doesn't define what the equivalence is from system
//  errors to generic ones. The one implemented in msvc is too conservative
//  for llvm, so we do an extra mapping when constructing an error_code
//  from an windows error. This allows the rest of llvm to simple checks
//  like "EC == std::errc::file_exists" and have it work on both posix and
//  windows.
//
//===----------------------------------------------------------------------===//

#ifdef _MSC_VER

#include <winerror.h>

#include "llvm/Support/WindowsError.h"

// I'd rather not double the line count of the following.
#define MAP_ERR_TO_COND(x, y)                                                  \
  case x:                                                                      \
    return std::make_error_code(std::errc::y)

std::error_code llvm::mapWindowsError(unsigned EV) {
  switch (EV) {
    MAP_ERR_TO_COND(ERROR_ACCESS_DENIED, permission_denied);
    MAP_ERR_TO_COND(ERROR_ALREADY_EXISTS, file_exists);
    MAP_ERR_TO_COND(ERROR_BAD_UNIT, no_such_device);
    MAP_ERR_TO_COND(ERROR_BUFFER_OVERFLOW, filename_too_long);
    MAP_ERR_TO_COND(ERROR_BUSY, device_or_resource_busy);
    MAP_ERR_TO_COND(ERROR_BUSY_DRIVE, device_or_resource_busy);
    MAP_ERR_TO_COND(ERROR_CANNOT_MAKE, permission_denied);
    MAP_ERR_TO_COND(ERROR_CANTOPEN, io_error);
    MAP_ERR_TO_COND(ERROR_CANTREAD, io_error);
    MAP_ERR_TO_COND(ERROR_CANTWRITE, io_error);
    MAP_ERR_TO_COND(ERROR_CURRENT_DIRECTORY, permission_denied);
    MAP_ERR_TO_COND(ERROR_DEV_NOT_EXIST, no_such_device);
    MAP_ERR_TO_COND(ERROR_DEVICE_IN_USE, device_or_resource_busy);
    MAP_ERR_TO_COND(ERROR_DIR_NOT_EMPTY, directory_not_empty);
    MAP_ERR_TO_COND(ERROR_DIRECTORY, invalid_argument);
    MAP_ERR_TO_COND(ERROR_DISK_FULL, no_space_on_device);
    MAP_ERR_TO_COND(ERROR_FILE_EXISTS, file_exists);
    MAP_ERR_TO_COND(ERROR_FILE_NOT_FOUND, no_such_file_or_directory);
    MAP_ERR_TO_COND(ERROR_HANDLE_DISK_FULL, no_space_on_device);
    MAP_ERR_TO_COND(ERROR_HANDLE_EOF, value_too_large);
    MAP_ERR_TO_COND(ERROR_INVALID_ACCESS, permission_denied);
    MAP_ERR_TO_COND(ERROR_INVALID_DRIVE, no_such_device);
    MAP_ERR_TO_COND(ERROR_INVALID_FUNCTION, function_not_supported);
    MAP_ERR_TO_COND(ERROR_INVALID_HANDLE, invalid_argument);
    MAP_ERR_TO_COND(ERROR_INVALID_NAME, invalid_argument);
    MAP_ERR_TO_COND(ERROR_LOCK_VIOLATION, no_lock_available);
    MAP_ERR_TO_COND(ERROR_LOCKED, no_lock_available);
    MAP_ERR_TO_COND(ERROR_NEGATIVE_SEEK, invalid_argument);
    MAP_ERR_TO_COND(ERROR_NOACCESS, permission_denied);
    MAP_ERR_TO_COND(ERROR_NOT_ENOUGH_MEMORY, not_enough_memory);
    MAP_ERR_TO_COND(ERROR_NOT_READY, resource_unavailable_try_again);
    MAP_ERR_TO_COND(ERROR_NOT_SAME_DEVICE, cross_device_link);
    MAP_ERR_TO_COND(ERROR_OPEN_FAILED, io_error);
    MAP_ERR_TO_COND(ERROR_OPEN_FILES, device_or_resource_busy);
    MAP_ERR_TO_COND(ERROR_OPERATION_ABORTED, operation_canceled);
    MAP_ERR_TO_COND(ERROR_OUTOFMEMORY, not_enough_memory);
    MAP_ERR_TO_COND(ERROR_PATH_NOT_FOUND, no_such_file_or_directory);
    MAP_ERR_TO_COND(ERROR_BAD_NETPATH, no_such_file_or_directory);
    MAP_ERR_TO_COND(ERROR_READ_FAULT, io_error);
    MAP_ERR_TO_COND(ERROR_RETRY, resource_unavailable_try_again);
    MAP_ERR_TO_COND(ERROR_SEEK, io_error);
    MAP_ERR_TO_COND(ERROR_SHARING_VIOLATION, permission_denied);
    MAP_ERR_TO_COND(ERROR_TOO_MANY_OPEN_FILES, too_many_files_open);
    MAP_ERR_TO_COND(ERROR_WRITE_FAULT, io_error);
    MAP_ERR_TO_COND(ERROR_WRITE_PROTECT, permission_denied);
    MAP_ERR_TO_COND(ERROR_SEM_TIMEOUT, timed_out);
    MAP_ERR_TO_COND(WSAEACCES, permission_denied);
    MAP_ERR_TO_COND(WSAEADDRINUSE, address_in_use);
    MAP_ERR_TO_COND(WSAEADDRNOTAVAIL, address_not_available);
    MAP_ERR_TO_COND(WSAEAFNOSUPPORT, address_family_not_supported);
    MAP_ERR_TO_COND(WSAEALREADY, connection_already_in_progress);
    MAP_ERR_TO_COND(WSAEBADF, bad_file_descriptor);
    MAP_ERR_TO_COND(WSAECONNABORTED, connection_aborted);
    MAP_ERR_TO_COND(WSAECONNREFUSED, connection_refused);
    MAP_ERR_TO_COND(WSAECONNRESET, connection_reset);
    MAP_ERR_TO_COND(WSAEDESTADDRREQ, destination_address_required);
    MAP_ERR_TO_COND(WSAEFAULT, bad_address);
    MAP_ERR_TO_COND(WSAEHOSTUNREACH, host_unreachable);
    MAP_ERR_TO_COND(WSAEINPROGRESS, operation_in_progress);
    MAP_ERR_TO_COND(WSAEINTR, interrupted);
    MAP_ERR_TO_COND(WSAEINVAL, invalid_argument);
    MAP_ERR_TO_COND(WSAEISCONN, already_connected);
    MAP_ERR_TO_COND(WSAEMFILE, too_many_files_open);
    MAP_ERR_TO_COND(WSAEMSGSIZE, message_size);
    MAP_ERR_TO_COND(WSAENAMETOOLONG, filename_too_long);
    MAP_ERR_TO_COND(WSAENETDOWN, network_down);
    MAP_ERR_TO_COND(WSAENETRESET, network_reset);
    MAP_ERR_TO_COND(WSAENETUNREACH, network_unreachable);
    MAP_ERR_TO_COND(WSAENOBUFS, no_buffer_space);
    MAP_ERR_TO_COND(WSAENOPROTOOPT, no_protocol_option);
    MAP_ERR_TO_COND(WSAENOTCONN, not_connected);
    MAP_ERR_TO_COND(WSAENOTSOCK, not_a_socket);
    MAP_ERR_TO_COND(WSAEOPNOTSUPP, operation_not_supported);
    MAP_ERR_TO_COND(WSAEPROTONOSUPPORT, protocol_not_supported);
    MAP_ERR_TO_COND(WSAEPROTOTYPE, wrong_protocol_type);
    MAP_ERR_TO_COND(WSAETIMEDOUT, timed_out);
    MAP_ERR_TO_COND(WSAEWOULDBLOCK, operation_would_block);
  default:
    return std::error_code(EV, std::system_category());
  }
}

#endif