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* add missing forward declarations
* remove needless header inclusions
* some style unification
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Include <sys/types.h> where needed, it does not belong in config.h.
Remove <stdio.h> from config.h; if it is missing somewhere, it should
be added, but i cannot find a *.c file where it is missing.
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hence missing definition of __BEGIN_DECLS;
found by Thomas Klausner <wiz at NetBSD> on SunOS 5.11
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Split manual names out of the common "keys" table into their
own "names" table. This reduces standard apropos(1) search
times (i.e. searching for names and descriptions only) by
typically about 70% for the full /usr/share/man database.
(Yes, that multiplies with the previous optimization step,
so both together have reduced search times by a factor of
more than six. I'm not done yet, expect more to come.)
Even with the minimal databases built with makewhatis(8) -Q,
this step still reduces search times by 15-20%. For both cases,
database sizes and build times hardly change (+/-2%).
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back from the keys table to the mpages table: I found a good way
to still use them in searches, without complication of the code.
On my notebook, this reduces typical apropos(1) search times by about 40%,
it reduces /usr/share/man database size by 6% in makewhatis(8) -Q mode
and by 2% in standard mode (less overhead storing pointers to mpages),
and it doesn't measurably change database build times (may even be
going down by a percent or so because less data is being copied
around in ohashes).
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This helps to find missing MLINKS.
Database build times do not change and database growth is minimal
(1.2% with -Q, 0.7% without -Q in /usr/share/man),
so making this optional would be pointless.
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i need that for debugging, in particular to be used with -t.
To be able to do so, provide a global table of key names, for reuse.
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