root/hodgestar/PythonCode/PicturePocketRevEng/umontools.py

"""Stringify data is usbmon logs.
   """

import sys

def convert_data_to_ascii(oIter):
    for sLine in oIter:
        if not " = " in sLine:
            yield sLine
            continue

        sLog, sData = sLine.split(" = ",1)

        sHexByte, sNewData = "", ""
        sData = sData.strip()

        for c in sData:
            if c.upper() in "ABCDEF0123456789":
                sHexByte += c
                if len(sHexByte) == 2:
                    sNewData += chr(int(sHexByte,16))
                    sHexByte = ""
            elif c in " " and len(sHexByte) == 0:
                sNewData += c
            else:
                raise RuntimeError("Bad character %s (ASCII: %s) found in data." % (c,ord(c)))

        if len(sHexByte) != 0:
            sNewData += " (trailing byte)"

        yield sLog + " = " + sNewData + "\n"

if __name__ == "__main__":
    oIter = convert_data_to_ascii(sys.stdin)
    for sLine in oIter:
        sys.stdout.write(sLine)