pgsql: Document and clean up gistsplit.c.

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Document and clean up gistsplit.c.
Date: 2013-02-10 16:59:12
Message-ID: E1U4aFE-0002Uq-3X@gemulon.postgresql.org
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Document and clean up gistsplit.c.

Improve comments, rename some variables and functions, slightly simplify
a couple of APIs, in an attempt to make this code readable by people other
than its original author.

Even though this is essentially just cosmetic, back-patch to all active
branches, because otherwise it's going to make back-patching future fixes
in this file very painful.

Branch
------
REL9_0_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/a260208afaf93a48da9813e9efccbea8f59a8fa3

Modified Files
--------------
src/backend/access/gist/gist.c | 8 +-
src/backend/access/gist/gistsplit.c | 442 +++++++++++++++++++++++------------
src/include/access/gist.h | 29 ++-
src/include/access/gist_private.h | 13 +-
4 files changed, 320 insertions(+), 172 deletions(-)

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