Regex Optional Groups Captures with Values - regex

Question

I'm having difficulties extracting irregular data using Regex. I attempted to use Lookheads however when the value doesn't exist the entire match returns false. The data set is consistent all the way until I reach the characters starting with RXX. The RXX are unique identifiers (groups) and the numeric values in between each set of Rxx's is what I would like to capture and assigned them to group names.
The Rxx values are random from R01 to R15 and 1 to all 15 could exist in the string.
The string values could vary from
12*000000000**S304JB01811*8*0*8*4*4*34R0332R152~~~
12*000000000**S304JB01811*9*0*4*3*4*224R023R032R10234R1325~~~
I'm able to extract the values and assign a group name until I reach the Rxx
My attempt are extracting the values are as follow
S304JB0...(?<Total1>[\d]+).(?<Total2>[\d]+).(?<Total3>[\d]+).(?<Total4>[\d]+).(?<Total5>[\d]+).(?<Total6>[\d]+).(?<Total7>[\d]+)
Which gives me what I want below
Total1 `1`
Total2 `8`
Total3 `0`
Total4 `8`
Total5 `4`
Total6 `4`
Total7 `34`
Capturing the R03 value and assigning it to Row is achieved below but if the value R03 doesn't exist in the string then the entire match returns false
(?<Row3>(R03)[\d]+)
Looking how I can make these regex statements optional allowing me to return the following
Total1 `1`
Total2 `8`
Total3 `0`
Total4 `8`
Total5 `4`
Total6 `4`
Total7 `34`
Row1 `32`
Row15 `2`
S304JB0...(?<Total1>[\d]+).(?<Total2>[\d]+).(?<Total3>[\d]+).(?<Total4>[\d]+).(?<Total5>[\d]+).(?<Total6>[\d]+).(?<Total7>[\d]+)(?<Row3>(R03)[\d]+)(?<Row4>(R04)[\d]+) ------> (?<Row15>(R15)[\d]+)
Thanks for your help
-Edited
Thanks for the quick reply Jorge
The input data will be
12*000000000**S304JB01811*8*0*8*4*4*34R0332R152~~~
The output will be 9 captured groups results
Group | Result
Total1 = 1
Total2 = 8
Total3 = 0
Total4 = 8
Total5 = 4
Total6 = 4
Total7 = 34
Row1 = 32
Row15 = 2
My example is shared below with input and
https://regex101.com/r/wG3aM3/68
Hopefully this helped to clarify things
D.

Answer 1

I'm certain this would be easier parsing char by char and storing each value.
As for the regex question, basically what you want to do is create all the groups, just like you've already tried, but you also want to make them optional, because not all groups might be there.
You can make the group optional with a construct like:
(?:R01(?<Row1>\d+))?
So you should add one of each to get the values in different capture groups. Notice I used the construct (?:non-capturing) which is exactly the same as a group, but it doesn't create a backreference. You can read about it here.
Edit: One more thing. You're using a . to allow any delimiter. However, performance-wise it would be better to use something like \D (anything except digits). In case of failure, it saves the regex engine quite a few backtracking steps.
This would be the whole expression, assuming the Rxx groups are always ordered.
S304JB0...(?<Total1>\d+)\D(?<Total2>\d+)\D(?<Total3>\d+)\D(?<Total4>\d+)\D(?<Total5>\d+)\D(?<Total6>\d+)\D(?<Total7>\d+)(?:R01(?<Row1>\d+))?(?:R02(?<Row2>\d+))?(?:R03(?<Row3>\d+))?(?:R04(?<Row4>\d+))?(?:R05(?<Row5>\d+))?(?:R06(?<Row6>\d+))?(?:R07(?<Row7>\d+))?(?:R08(?<Row8>\d+))?(?:R09(?<Row9>\d+))?(?:R10(?<Row10>\d+))?(?:R11(?<Row11>\d+))?(?:R12(?<Row12>\d+))?(?:R13(?<Row13>\d+))?(?:R14(?<Row14>\d+))?(?:R15(?<Row15>\d+))?
DEMO