64 lines
1.8 KiB
Python
64 lines
1.8 KiB
Python
import argparse
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import sys
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DEFAULT_WIDTH = 16
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def hexy(i, width=0):
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return hex(i)[2:].upper().rjust(width, '0')
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def hexdump(handle, width=DEFAULT_WIDTH, ellipse=False, start=None, end=None):
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if start is not None:
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start = int(start, 16)
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handle.seek(start)
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address = start
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else:
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address = 0
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if end is not None:
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end = int(end, 16)
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did_ellipse = False
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previous_line = None
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while True:
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if end is not None:
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if address > end:
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break
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this_width = min(width, end - address)
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else:
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this_width = width
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line = handle.read(this_width)
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if not line:
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break
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line = [hexy(x, 2) for x in line]
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line = ' '.join(line)
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if ellipse:
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if line == previous_line:
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if not did_ellipse:
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print('...')
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did_ellipse = True
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address += width
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continue
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previous_line = line
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print('%s | ' % hexy(address, 8), end='', flush=False)
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print(line)
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address += width
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def hexdump_argparse(args):
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handle = open(args.filename, 'rb')
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return hexdump(handle, width=args.width, ellipse=args.ellipse, start=args.start, end=args.end)
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def main(argv):
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parser = argparse.ArgumentParser()
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parser.add_argument('filename')
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parser.add_argument('--width', dest='width', default=DEFAULT_WIDTH, type=int)
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parser.add_argument('--start', dest='start', default=None)
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parser.add_argument('--end', dest='end', default=None)
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parser.add_argument('--ellipse', dest='ellipse', action='store_true')
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parser.set_defaults(func=hexdump_argparse)
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args = parser.parse_args(argv)
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return args.func(args)
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if __name__ == '__main__':
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raise SystemExit(main(sys.argv[1:]))
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