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#    -*- coding: utf-8 -*-

import os
import re
import sys
import time
import random


#************************************************************************

class CAN (object):


    def __init__ (self,communication_matrix={}):
        pass

#*************************************************************************

    def t_make_communication_matrix (self,msgcount=10):
    
        """
        Sets an arbitrary communication matrix by random,
        msgcount: the count of messages in the matrix
        """

        communication_matrix = {}
        rand     = random.Random()

        zaehler = 0
        while zaehler < msgcount:
        
            msg_signals = ""
            msg_bits    = 0
            msg_bytes   = rand.randint(1,8)
            msg_name    = "%03x" % rand.randint(1,2047)

            while (0 == 0):
                signal_name = rand.choice("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
                zaehler1 = 0
                zaehlmax = rand.randint(3,7)
                while (zaehler1 < zaehlmax):
                    signal_name = signal_name + rand.choice("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789______")
                    zaehler1 = zaehler1 + 1
                signal_len = rand.choice([1,1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,28,19,20])
                msg_bits   = msg_bits + signal_len
                if msg_bits > msg_bytes * 8:
                    break
                msg_signals = msg_signals + "," + signal_name + "," + str(signal_len)
                
            if not msg_signals == "":
                communication_matrix[msg_name] = msg_signals[1:]
                zaehler = zaehler + 1
                
            return(communication_matrix)

#****************************************************************

    def t_get_signals (self,communication_matrix):
    
        """
        Gets all signals from
        the given communication matrix
        """

        signal_list = {}

        for msg in communication_matrix.keys():
            sig_str = communication_matrix[msg].split(",")
            zaehler = 0
            while (0 == 0):
                try:
                    signal_list[sig_str[zaehler]] = sig_str[zaehler+1]
                except:
                    break
                zaehler = zaehler + 2

        return(signal_list)