static int windows_to_posix_errno()

in erts/emulator/nifs/win32/win_prim_file.c [1505:1602]

• 98 lines of code
• 67 McCabe index (conditional complexity)

static int windows_to_posix_errno(DWORD last_error) {
    switch(last_error) {
    case ERROR_SUCCESS:
        return 0;
    case ERROR_INVALID_FUNCTION:
    case ERROR_INVALID_DATA:
    case ERROR_INVALID_PARAMETER:
    case ERROR_INVALID_TARGET_HANDLE:
    case ERROR_INVALID_CATEGORY:
    case ERROR_NEGATIVE_SEEK:
        return EINVAL;
    case ERROR_DIR_NOT_EMPTY:
        return EEXIST;
    case ERROR_BAD_FORMAT:
        return ENOEXEC;
    case ERROR_PATH_NOT_FOUND:
    case ERROR_FILE_NOT_FOUND:
    case ERROR_NO_MORE_FILES:
    case ERROR_INVALID_NAME:
        return ENOENT;
    case ERROR_TOO_MANY_OPEN_FILES:
        return EMFILE;
    case ERROR_ACCESS_DENIED:
    case ERROR_INVALID_ACCESS:
    case ERROR_CURRENT_DIRECTORY:
    case ERROR_SHARING_VIOLATION:
    case ERROR_LOCK_VIOLATION:
    case ERROR_INVALID_PASSWORD:
    case ERROR_DRIVE_LOCKED:
        return EACCES;
    case ERROR_INVALID_HANDLE:
        return EBADF;
    case ERROR_NOT_ENOUGH_MEMORY:
    case ERROR_OUTOFMEMORY:
    case ERROR_OUT_OF_STRUCTURES:
        return ENOMEM;
    case ERROR_INVALID_DRIVE:
    case ERROR_BAD_UNIT:
    case ERROR_NOT_READY:
    case ERROR_REM_NOT_LIST:
    case ERROR_DUP_NAME:
    case ERROR_BAD_NETPATH:
    case ERROR_NETWORK_BUSY:
    case ERROR_DEV_NOT_EXIST:
    case ERROR_BAD_NET_NAME:
        return ENXIO;
    case ERROR_NOT_SAME_DEVICE:
        return EXDEV;
    case ERROR_WRITE_PROTECT:
        return EROFS;
    case ERROR_BAD_LENGTH:
    case ERROR_BUFFER_OVERFLOW:
        return E2BIG;
    case ERROR_SEEK:
    case ERROR_SECTOR_NOT_FOUND:
        return ESPIPE;
    case ERROR_NOT_DOS_DISK:
        return ENODEV;
    case ERROR_GEN_FAILURE:
        return ENODEV;
    case ERROR_SHARING_BUFFER_EXCEEDED:
    case ERROR_NO_MORE_SEARCH_HANDLES:
        return EMFILE;
    case ERROR_HANDLE_EOF:
    case ERROR_BROKEN_PIPE:
        return EPIPE;
    case ERROR_HANDLE_DISK_FULL:
    case ERROR_DISK_FULL:
        return ENOSPC;
    case ERROR_NOT_SUPPORTED:
        return ENOTSUP;
    case ERROR_FILE_EXISTS:
    case ERROR_ALREADY_EXISTS:
    case ERROR_CANNOT_MAKE:
        return EEXIST;
    case ERROR_ALREADY_ASSIGNED:
        return EBUSY;
    case ERROR_NO_PROC_SLOTS:
        return EAGAIN;
    case ERROR_CANT_RESOLVE_FILENAME:
        return EMLINK;
    case ERROR_PRIVILEGE_NOT_HELD:
        return EPERM;
    case ERROR_ARENA_TRASHED:
    case ERROR_INVALID_BLOCK:
    case ERROR_BAD_ENVIRONMENT:
    case ERROR_BAD_COMMAND:
    case ERROR_CRC:
    case ERROR_OUT_OF_PAPER:
    case ERROR_READ_FAULT:
    case ERROR_WRITE_FAULT:
    case ERROR_WRONG_DISK:
    case ERROR_NET_WRITE_FAULT:
        return EIO;
    default: /* not to do with files I expect. */
        return EIO;
    }
}