Address Conversion to Hex

[teamsp]

Does anyone have a function that will convert an address in the form "23:4D:3E" (a string) to the form required for the rpc method?

n = int(mac.replace(':', ''), 16) doesn't seem to work as all the functions are not allowed.

I have also tried something like:
tmpAddrStr = AddrStr[0:1] & AddrStr[3:4] & AddrStr[6:7]
tmpConvertedHexAddr = int(tmpAddrStr, 16)
rpc(tmpConvertedHexAddr,"waitForData","Hello")

This results in an Allocation Failed in Function stdInEvent....

I've also tried:
tmpAddrStr = chr(int(tmpAddrStr[0:1],16)) + chr(int(tmpAddrStr[3:4],16)) + chr(int(tmpAddrStr[6:7],16))

I would think that should work... there are no errors, but using the resulting address does not appear to call the remote synapse module.

Any help would be appreciated.

Thank you.

[teamsp]

Anybody have any thoughts on this one?

[gvoce]

I would suggest seacrhing the forum for hex support also the attached files should help

[teamsp]

Thank you.

[nmaron]

The issue is slicing

If I understand your problem: using slice [3:4] for example, will only return the byte/character at location 3. You have to use [3:5] to get elements 3 and 4. I got bit by this myself until I got Python slicing down.

[mtalent]

I use these three methods I can't remember where I found them send AABBCC to convStrAddr(addrStr)

I have the methods to go the other way also if you need them

SORRY ABOUT THE SPACING I CAN'T SEEM TO PASTE THE METHODS IN WITH CORRECT INDENTATION



def convStrToAddr(addrStr):
'''Convert a regular string into a SNAP address
Expects 'AABBCC' address format as input'''
if len(addrStr) >= 6:
byte1 = addrStr[0:2]
byte2 = addrStr[2:4]
byte3 = addrStr[4:6]
return chr(convStrToByte(byte1)) + chr(convStrToByte(byte2)) + chr(convStrToByte(byte3))


def convStrToByte(byteStr):
'''Convert a byte-sized string'''
msd = byteStr[0]
lsd = byteStr[1]
result = convStrNibble(msd) << 4
result += convStrNibble(lsd)
return result

def convStrNibble(nibble):
'''Convert the nibble to hex value'''
numStr = "0123456789"
i = 0
found = False
while i < len(numStr):
if nibble == numStr[i]:
found = True
break
i+=1
if found:
return (ord(nibble) - ord('0'))

capStr = "ABCDEF"
i = 0
found = False
while i < len(capStr):
if nibble == capStr[i]:
found = True
break
i+=1
if found:
return (ord(nibble) - ord('A') + 10)

lwrStr = "abcdef"
i = 0
found = False
while i < len(lwrStr):
if nibble == lwrStr[i]:
found = True
break
i+=1
if found:
return (ord(nibble) - ord('a') + 10)

return None