blob: 2bb967cf29da025c34c55db61967b3fafe2f2999 [file] [log] [blame]
#!/usr/bin/env python3
#
# Copyright (c) 2017 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
"""Convert a file to a list of hex characters
The list of hex characters can then be included to a source file. Optionally,
the output can be compressed.
"""
import argparse
import codecs
import gzip
import io
def parse_args():
global args
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter, allow_abbrev=False)
parser.add_argument("-f", "--file", required=True, help="Input file")
parser.add_argument("-o", "--offset", type=lambda x: int(x, 0), default=0,
help="Byte offset in the input file")
parser.add_argument("-l", "--length", type=lambda x: int(x, 0), default=-1,
help="""Length in bytes to read from the input file.
Defaults to reading till the end of the input file.""")
parser.add_argument("-g", "--gzip", action="store_true",
help="Compress the file using gzip before output")
parser.add_argument("-t", "--gzip-mtime", type=int, default=0,
nargs='?', const=None,
help="""mtime seconds in the gzip header.
Defaults to zero to keep builds deterministic. For
current date and time (= "now") use this option
without any value.""")
args = parser.parse_args()
def get_nice_string(list_or_iterator):
return ", ".join("0x" + str(x) for x in list_or_iterator)
def make_hex(chunk):
hexdata = codecs.encode(chunk, 'hex').decode("utf-8")
hexlist = map(''.join, zip(*[iter(hexdata)] * 2))
print(get_nice_string(hexlist) + ',')
def main():
parse_args()
if args.gzip:
with io.BytesIO() as content:
with open(args.file, 'rb') as fg:
fg.seek(args.offset)
with gzip.GzipFile(fileobj=content, mode='w',
mtime=args.gzip_mtime,
compresslevel=9) as gz_obj:
gz_obj.write(fg.read(args.length))
content.seek(0)
for chunk in iter(lambda: content.read(8), b''):
make_hex(chunk)
else:
with open(args.file, "rb") as fp:
fp.seek(args.offset)
if args.length < 0:
for chunk in iter(lambda: fp.read(8), b''):
make_hex(chunk)
else:
remainder = args.length
for chunk in iter(lambda: fp.read(min(8, remainder)), b''):
make_hex(chunk)
remainder = remainder - len(chunk)
if __name__ == "__main__":
main()