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Re: SAFEcode

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: SAFEcode
Date 2015-04-16 22:11 +0100
Organization A noiseless patient Spider
Message-ID <87bnin93sm.fsf@bsb.me.uk> (permalink)
References (16 earlier) <b9041111-d6a1-42ca-81ee-c88a0c20b0b4@googlegroups.com> <87h9shrxzq.fsf@kst-u.example.com> <79e51590-587b-4fc3-8d7d-8c942be64d1b@googlegroups.com> <87iocw9itn.fsf@bsb.me.uk> <58fa4013-d529-4a33-9efb-84e73bf90169@googlegroups.com>

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Malcolm McLean <malcolm.mclean5@btinternet.com> writes:

> On Thursday, April 16, 2015 at 4:47:17 PM UTC+1, Ben Bacarisse wrote:
>> Malcolm McLean <malcolm.mclean5@btinternet.com> writes:
>> <snip>
>> > For example, we've opened a stream, which we know will send us a
>> > human-composed message in English text. We want to store it in a
>> > memory buffer. Every time we ask for memory, we get charged on a
>> > per byte basis (the malloc zeroes out memory, so if you ask for 20K,
>> > that's ten times as expensive as asking for 2K). realloc() has
>> > exactly the same cost as malloc().
>> > So, clearly, our best strategy is to get a  statistical distribution
>> > of the messages coming in, and then work out some sort of formula
>> > that minimises the number of calls.
>> 
>> Can you prove that (or have I made the mistake of taking you literally
>> again)?  Given the cost model you've proposed, the optimal strategy
>> would seem to involve minimising the number of bytes allocated, not the
>> number of calls made.
>> 
> malloc(10) costs 10 units, malloc(20) costs 20 units
> realloc(ptr, 10) costs 10 units, realloc(ptr, 20) costs 20 units.

Ah, so the cost is not per byte used but per byte asked for.  I suppose
I could have inferred that from the remark about realloc having the same
cost as malloc, but I took that to mean that reallocated memory costs
the same as allocated-once memory.

> So if we start with ptr = malloc(1) and then call
> ptr = realloc(ptr, 2), ptr = realloc(ptr, 3) etc it's an expensive algorithm,
> costing N^2/2 (plus N/2, since I'm under attack for being unclear and wrong
> in every respect).

That's what big O and friends are for -- the cost function is O(N^2).
I've lost track of where this was going, but if there is a connection
with golden section search I am now in a position to follow it.

> We're only allowed one buffer, I must clarify. Otherwise you can generate lots
> of buffers of one byte and trivially get an optimal answer. 

It sounds like you are setting this as a challenge.  I am not aware of
any optimal strategy, but, in terms of memory actually used and copied,
any exponential growth pattern avoids the quadratic behaviour of the
naive approach.  Are you saying that a Fibonacci pattern of allocations
is known to have some theoretical advantage?  I don't recall ever seeing
that used (though a Fibonacci-like pattern of sizes is sometimes used in
allocators that have fixed-sized blocks held in free lists).

-- 
Ben.

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Thread

SAFEcode G G <gdotone@gmail.com> - 2015-04-13 21:19 -0700
  Re: SAFEcode Ian Collins <ian-news@hotmail.com> - 2015-04-14 17:12 +1200
    Re: SAFEcode Ian Collins <ian-news@hotmail.com> - 2015-04-14 17:19 +1200
  Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-14 00:24 -0500
    Re: SAFEcode G G <gdotone@gmail.com> - 2015-04-13 23:45 -0700
  SAFEcode asetofsymbols@gmail.com - 2015-04-13 22:30 -0700
  Re: SAFEcode Robbie Hatley <see.my.sig@for.my.address> - 2015-04-14 00:14 -0700
    Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-14 10:33 +0200
      Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 02:01 -0700
        Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-14 10:23 +0100
        Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-14 11:49 +0200
          Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 04:31 -0700
            Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-14 14:54 +0200
              Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 06:39 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-14 16:10 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 08:11 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-14 23:58 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 01:25 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-15 11:11 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 02:35 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-15 13:52 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 06:04 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-15 08:08 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 08:57 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-15 18:24 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 09:45 -0700
                Re: SAFEcode Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-04-15 19:09 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 22:29 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-16 08:23 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-16 10:44 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-16 11:22 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-19 15:33 +0000
                Re: SAFEcode Steve Thompson <stevet810@gmail.com> - 2015-04-16 04:38 +0000
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-16 14:12 -0500
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-17 09:28 +0200
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-17 09:33 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-17 02:08 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-17 09:43 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-17 08:04 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-17 17:08 -0500
                Re: SAFEcode Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-17 08:07 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-15 12:29 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 22:56 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-16 10:29 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-16 04:46 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-16 13:08 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-16 08:42 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-16 16:47 +0100
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-16 16:53 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-16 10:52 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-16 22:11 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-17 10:22 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-17 02:17 -0700
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-17 05:56 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-17 04:37 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-17 10:04 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-17 08:38 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-17 20:52 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-18 13:16 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-18 04:22 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-18 14:08 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-18 06:00 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-18 21:42 +0200
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-18 17:47 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 00:11 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-19 12:52 +0000
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-19 09:10 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 07:21 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-19 12:54 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 11:18 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-20 09:58 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 08:09 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-20 13:06 -0500
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-19 07:32 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 09:03 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-19 16:30 +0100
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-19 12:58 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 05:37 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-18 08:00 -0500
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-18 19:28 +0100
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-18 09:37 -0500
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-19 11:37 +0100
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-19 09:56 -0500
                Re: SAFEcode Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-22 15:49 -0700
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 18:13 -0500
                Re: SAFEcode Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-28 12:46 -0700
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-20 16:50 -0500
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-17 10:31 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-17 21:09 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-17 19:01 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-18 15:18 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-18 09:00 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-18 21:52 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 00:02 -0700
                Re: SAFEcode asetofsymbols@gmail.com - 2015-04-19 00:40 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 03:52 -0700
                Re: SAFEcode asetofsymbols@gmail.com - 2015-04-21 09:02 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-19 12:58 +0000
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 07:25 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-19 15:51 +0000
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-19 23:22 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 16:26 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-20 00:48 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 09:15 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 00:39 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 10:33 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 01:55 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 11:28 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 02:39 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 12:35 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 03:58 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 13:37 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 06:04 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 15:37 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 06:52 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 16:23 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 07:32 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 22:42 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 21:56 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-21 09:21 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 01:00 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-21 10:37 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 01:59 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-21 12:21 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 03:45 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-21 10:05 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-21 12:14 +0200
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-21 08:18 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 08:51 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-22 09:44 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 01:38 -0700
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 03:45 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 02:13 -0700
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 04:29 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 03:29 -0700
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 10:30 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 09:13 -0700
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 13:03 -0500
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-22 11:38 -0700
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 15:25 -0500
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-22 21:49 +0100
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 16:17 -0500
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-22 22:33 +0100
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 16:56 -0500
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-23 09:24 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-23 02:25 -0700
                Re: SAFEcode Richard Damon <Richard@Damon-Family.org> - 2015-04-23 08:24 -0400
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-23 06:18 -0700
                Re: SAFEcode Ben Bacarisse <ben.lists@bsb.me.uk> - 2015-04-23 14:47 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-23 07:16 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-23 17:20 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-23 08:44 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-25 10:14 +0000
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-25 04:04 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-25 12:22 +0000
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-25 10:53 -0700
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-23 16:48 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-24 12:49 +0200
                Re: SAFEcode Ben Bacarisse <ben.lists@bsb.me.uk> - 2015-04-23 20:40 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-23 13:03 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-23 23:49 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-24 01:07 -0700
                Re: SAFEcode Ben Bacarisse <ben.lists@bsb.me.uk> - 2015-04-24 11:51 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-24 04:29 -0700
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-24 13:20 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-24 06:48 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-25 10:16 +0000
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-24 15:48 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-24 10:05 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-24 22:59 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-26 00:16 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-24 04:39 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-24 22:59 +0100
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-23 08:17 -0500
                Re: SAFEcode Robert Wessel <robertwessel2@yahoo.com> - 2015-04-22 16:49 -0500
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 17:01 -0500
                Re: SAFEcode James Kuyper <jameskuyper@verizon.net> - 2015-04-22 17:51 -0400
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-22 17:35 -0500
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-22 17:45 -0700
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-23 09:29 +0100
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-23 08:29 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-23 08:55 -0700
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-23 21:11 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 06:23 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-22 13:08 -0500
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-22 20:17 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 12:43 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-23 11:52 +0000
                Re: SAFEcode Robert Wessel <robertwessel2@yahoo.com> - 2015-04-23 13:53 -0500
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-25 10:18 +0000
                Re: SAFEcode Morris Dovey <mrdovey@iedu.com> - 2015-04-25 21:37 -0500
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-20 12:05 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 04:28 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 04:38 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-20 12:40 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 14:11 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 06:31 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 16:31 +0200
                Re: SAFEcode jadill33@gmail.com - 2015-04-20 09:38 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-20 22:52 +0200
                Re: SAFEcode asetofsymbols@gmail.com - 2015-04-20 11:10 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-20 22:43 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-20 22:59 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-21 09:27 +0200
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-21 15:12 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 07:31 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-21 16:43 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 08:01 -0700
                Re: SAFEcode raltbos@xs4all.nl (Richard Bos) - 2015-04-21 22:29 +0000
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-21 11:09 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 10:13 -0700
                Re: SAFEcode gwowen <gwowen@gmail.com> - 2015-04-21 10:22 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 16:51 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-22 02:52 +0100
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-21 14:44 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 16:58 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-22 01:11 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-21 17:31 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-22 10:09 +0200
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-22 10:50 +0100
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-22 11:12 +0100
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-22 11:37 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 05:54 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-22 15:31 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 06:48 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-22 16:29 +0200
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-22 16:13 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 08:22 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-22 16:25 +0100
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-22 10:35 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-22 13:24 -0500
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-23 01:18 +0200
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-23 06:11 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-23 09:36 +0200
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-22 08:38 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-22 13:04 +0200
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-22 09:52 -0500
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-22 16:23 +0100
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-22 10:28 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 08:16 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-22 13:53 -0500
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-22 12:45 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-22 16:44 -0500
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-21 22:58 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-22 09:53 +0200
                Re: SAFEcode gwowen <gwowen@gmail.com> - 2015-04-21 10:15 -0700
                Re: SAFEcode Martin Shobe <martin.shobe@yahoo.com> - 2015-04-21 13:57 -0500
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-21 23:01 +0100
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-21 23:46 +0100
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-22 01:49 +0100
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-22 08:32 +0100
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-22 10:02 +0100
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-21 12:06 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-21 20:18 +0100
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-21 12:30 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-21 21:30 +0100
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-21 13:39 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-21 20:21 +0100
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-22 10:24 +0200
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-22 09:46 +0100
                Re: SAFEcode gwowen <gwowen@gmail.com> - 2015-04-22 02:57 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-22 08:42 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-19 16:19 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-19 09:08 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-16 08:55 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-16 11:03 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-16 11:35 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-17 10:28 +0200
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-17 09:51 +0100
                Re: SAFEcode Phil Carmody <pc+usenet@asdf.org> - 2015-04-20 11:28 +0300
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-17 10:32 +0200
                Re: SAFEcode Bartc <bc@freeuk.com> - 2015-04-14 15:24 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 08:03 -0700
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-14 18:48 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 12:43 -0700
                Re: SAFEcode Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-04-14 21:52 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 13:16 -0700
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-14 21:39 +0100
                Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-15 01:20 +0100
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-15 01:29 +0100
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 01:32 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-15 08:17 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 09:13 -0700
                Re: SAFEcode Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-04-15 18:33 +0200
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-15 10:02 -0700
                Re: SAFEcode Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-04-15 20:55 +0200
                Re: SAFEcode Robert Wessel <robertwessel2@yahoo.com> - 2015-04-15 19:27 -0500
                Re: SAFEcode Phil Carmody <pc+usenet@asdf.org> - 2015-04-20 11:53 +0300
                Re: SAFEcode Ian Collins <ian-news@hotmail.com> - 2015-04-16 14:51 +1200
                Re: SAFEcode Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-17 02:13 -0700
                Re: SAFEcode Johannes Bauer <dfnsonfsduifb@gmx.de> - 2015-04-15 08:14 +0200
                Re: SAFEcode Richard Heathfield <rjh@cpax.org.uk> - 2015-04-14 21:02 +0100
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-14 08:33 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 08:54 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-14 11:43 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 12:41 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-14 13:08 -0700
                Re: SAFEcode Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-14 14:02 -0700
                Re: SAFEcode Keith Thompson <kst-u@mib.org> - 2015-04-14 15:29 -0700
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-15 10:03 +0200
                Re: SAFEcode David Brown <david.brown@hesbynett.no> - 2015-04-15 10:02 +0200
        Re: SAFEcode Phil Carmody <pc+usenet@asdf.org> - 2015-04-20 11:13 +0300
    Re: SAFEcode Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-14 13:03 +0100

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