We already have a function ctf_type_aname_raw, which returns the raw
name of a type with no decoration for structures or arrays or anything
like that: just the underlying name of whatever it is that's being
ultimately pointed at.
But this can be inconvenient to use, becauswe it always allocates new
storage for the string and copies it in, so it can potentially fail.
Add ctf_type_name_raw, which just returns the string directly out of
libctf's guts: it will live until the ctf_file_t is closed (if we later
gain the ability to remove types from writable dicts, it will live as
long as the type lives).
Reimplement ctf_type_aname_raw in terms of it.
include/
* ctf-api.c (ctf_type_name_raw): New.
libctf/
* ctf-types.c (ctf_type_name_raw): New.
(ctf_type_aname_raw): Reimplement accordingly.
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