human readable TBCD STRING in XER

[leniviytorrent]

Suppose, I have the file gsn3_4.asn1 :

SGSNPDPRecord ::= SET
{
    recordType          [0] CallEventRecordType,
    servedIMSI          [3] OCTET STRING (SIZE (3..8)),
    servedIMEI          [4] OCTET STRING (SIZE (8)) OPTIONAL,
--  servedIMEI          [4] TBCD STRING (SIZE (8)) OPTIONAL,

It was adapted for asn1c, because TBCD STRING gives:

ASN.1 grammar parse error near line 113 (token "STRING"): syntax error, unexpected TOK_STRING, expecting '}'
Cannot parse "gsn3_4.asn1"

A CDR file converted to xml, has TBCD strings in the form:

        <servedIMSI>22 08 41 11 85 08 38 F0</servedIMSI>

I want to create an new syntax, which will be alternate for reading and default for writing. Something like this:

        <servedIMSI>'228014115880830'</servedIMSI>

[Lev Walkin]

You can do that by modifying the source code for OCTET STRING or IA5String.