Hmm... looking at some older code, maybe htab_t (from hashtab.h) is the only viable alternative.

Yet another hashtable ;-) Seems to be working with this, but would be great if you could do a quick review: jpf91@83983bb
I think there's no way to easily review merge commits on github. git show 83983bb produces more useful output.

BTW: Which code conventions are we using right now? Whitespace after function name before parenthesis? Whitespace after parenthesis for casts?