Re: 2.6 - 3.x bytearray from c_char_ p

Turns out it actually wasn't working. It stopped on bytes of value 0
thinking it was a NULL termination.

I found in the docs:

class ctypes.c_char_p¶
    Represents the C char * datatype when it points to a zero-terminated
string. For a general character pointer that may also point to binary data,
POINTER(c_char) must be used. The constructor accepts an integer address,
or a string.


So the callback argument is of type POINTER(c_char) instead of c_char_p.

Given a parameter, Pointer, of such a type, to get a usable string of
"Length" size, use the notation Jeff gave:

def Callback(Pointer, Length):
    Usable = Pointer[:Length]

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