The default separator is tab character which is \t. However, if there are comments in a line of code being analyzed it messes up the format of the generated tag file. How to Modify default separator for CTAGS generated tag file?
You may like xformat feature of Universal-ctags. With the feature you can define your own format of output.
[jet@localhost]~/var/ctags% cat input.c
#define ZERO 0
int main(void)
{
return ZERO;
}
[jet@localhost]~/var/ctags% ./ctags -x --_xformat='(N, K, L) = ("%{name}", "%{kind}", %{line})' input.c
(N, K, L) = ("ZERO", "macro", 1)
(N, K, L) = ("main", "function", 2)
http://docs.ctags.io/en/latest/news.html#customizing-xref-output may give you more hints.