[pnathan]

That is characteristic of mathematical code, like btree. (ranty aside: being able to recognize this and find out information regarding btree for maintenance is(should be) one of the key reasons to get a CS degree)

I found the btree file relatively readable. Some macro stuff is not familiar to me, but I am sure I could figure it out in a few hours if I felt like. And I haven't yet rolled around to implementing a full-on btree, ever.