lehrkraefte:blc:informatik:efi-2023:bitsundbytes [https://fginfo.ksbg.ch Fachgruppe Informatik der KSBG]

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====== Bits und Bytes ======

<code python hexdump.py>
import sys
import os
import numpy as np

if len(sys.argv)!=2:
    raise "Es muss eine Datei als Kommandozeilenargument angegeben werden."

file = sys.argv[1]
if not os.path.exists(file):
    raise f"Datei {file} nicht gefunden!"


with open(file, "rb") as f:
    binData = f.read()

group = 4
for i in range(0, len(binData), group):
    line = "%04d | " % i
    for j in range(i, min(len(binData),i+group)):
        zweier = format(binData[j], "08b")
        line += zweier[0:4]+"_"+zweier[4:]+"  "
    line += " | "
    for j in range(i, min(len(binData),i+group)):
        line +="%02x " % binData[j]
    line += " | "
    for j in range(i, min(len(binData),i+group)):
        line +="%3d " % binData[j]
    line += " | "
    for j in range(i, min(len(binData),i+group)):
        if (binData[j]<127 and binData[j]>32):
            line += chr(binData[j])
        else:
            line += " "
    print(line)

</code>