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scripts: build: file2hex: Add optional offset and length parameters

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Add optional offset and length parameters to generate partial hex files.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>
This commit is contained in:
Pieter De Gendt 2023-09-13 16:22:42 +02:00 • committed by Carles Cufí
commit ae8c72444e
1 changed files with 16 additions and 3 deletions
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19
scripts/build/file2hex.py
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@ -26,6 +26,11 @@ def parse_args():
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,
@ -53,18 +58,26 @@ def main():
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())
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:
for chunk in iter(lambda: fp.read(8), b''):
make_hex(chunk)
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__":