Nicolas Williams 823fb82477 asn1: Add --decorate=... for internal bookkeeping ...

This option, `--decorate=TYPE-NAME:FIELD-TYPE:field-name[?]` allows one to add
a field to any struct generated by the ASN.1 compiler for any SET or SEQUENCE
type such that:

 - the field will     be freed by the `free_TYPE_NAME()` function
 - the field will     be copied by the `copy_TYPE_NAME()` function
 - the field will not be printed by the `print_TYPE_NAME()` function
 - the field will NOT be encoded or decoded

This is useful for internal bookkeeping.

The first use of this may well be for adding an optional field to
`Principal` where information about name attributes will be stored,
which will then allow us to have GSS name attributes for the krb5
mechanism w/o having to refactor the mechanism to use a different
structure for representing `gss_name_t` mechnames than the one currently
used (`Principal`; `krb5_principal` happens to be a typedef alias of
`Principal *`).

So w/o massive rototilling of the GSS krb5 mechanism we can have name
attributes, _and_ we'll also be able to have those in the krb5 API as
well w/o any massive rototilling there either.

2021-12-19 23:21:35 -06:00

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