1# Utilities for python-based QEMU tests 2# 3# Copyright 2024 Red Hat, Inc. 4# 5# Authors: 6# Thomas Huth <thuth@redhat.com> 7# 8# This work is licensed under the terms of the GNU GPL, version 2 or 9# later. See the COPYING file in the top-level directory. 10 11import os 12 13from .archive import tar_extract as archive_extract 14from .archive import cpio_extract 15from .uncompress import gzip_uncompress 16from .uncompress import lzma_uncompress 17 18""" 19Round up to next power of 2 20""" 21def pow2ceil(x): 22 return 1 if x == 0 else 2**(x - 1).bit_length() 23 24def file_truncate(path, size): 25 if size != os.path.getsize(path): 26 with open(path, 'ab+') as fd: 27 fd.truncate(size) 28 29""" 30Expand file size to next power of 2 31""" 32def image_pow2ceil_expand(path): 33 size = os.path.getsize(path) 34 size_aligned = pow2ceil(size) 35 if size != size_aligned: 36 with open(path, 'ab+') as fd: 37 fd.truncate(size_aligned) 38