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Re: [Nmh-workers] Limit of 27 messages sequences per folder

From: Lyndon Nerenberg
Subject: Re: [Nmh-workers] Limit of 27 messages sequences per folder
Date: Wed, 27 Mar 2013 19:24:14 -0700

On 2013-03-27, at 3:16 PM, David Levine wrote:

> Sure, 64-bit ints still have that risk.  But I don't have
> a Cray :-]

What you really want is a PDP-10.  Throw some 36-bit ints into the mix and 
watch people start excreting large bricks :-)  

Anyway, I'm with David on this one.  Leave the sequence bitmap at 32 bits.  
There's no way we can propose making this platform dependent and admit it could 
lose user data.  The short term fix should be to ensure we use a uint32_t 
instead of an int, to make it very clear what's going on, and document the 
limit.  The next step is for someone who really feels 27 sequences is a 
hindrance to replace the uint32_t with a variable-length bitfield.  I can't 
believe there are less than a few hundred license-compatible implementations 
out there to chose from.


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