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#!/usr/bin/env python
#
# Copyright 2007 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from optparse import OptionParser
import sys
def main():
parser = OptionParser()
parser.add_option("-f", "--file", default=None,
help="Choose file to read data from.")
(options, args) = parser.parse_args()
if options.file == None:
print("Must specify file to read from using '-f'.")
sys.exit(1)
print("Using", options.file, "for data.")
f = open(options.file, 'r')
runs = []
count = 0
current = 0
bytes = 0
bits = 0
for ch in f.read():
x = ord(ch)
bytes = bytes + 1
for i in range(7, -1, -1):
bits = bits + 1
t = (x >> i) & 0x1
if t == current:
count = count + 1
else:
if count > 0:
if len(runs) < count:
for j in range(count - len(runs)):
runs.append(0)
runs[count - 1] = runs[count - 1] + 1
current = 1 - current
count = 1
# Deal with last run at EOF
if len(runs) < count and count > 0:
for j in range(count - len(runs)):
runs.append(0)
runs[count - 1] = runs[count - 1] + 1
chk = 0
print("Bytes read: ", bytes)
print("Bits read: ", bits)
print()
for i in range(len(runs)):
chk = chk + runs[i] * (i + 1)
print("Runs of length", i + 1, ":", runs[i])
print()
print("Sum of runs:", chk, "bits")
print()
print("Maximum run length is", len(runs), "bits")
if __name__ == "__main__":
main()
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