Re: How to quickly compare equality of structs ...

[Keith David Bershatsky]

Thank you, Paul, for the suggestions.

This afternoon, I came across the Cantor's Pairing Function that can be used to 
create a unique ID for each fake cursor.  With that unique ID, I can limit the 
quantity of comparisons ....

 n = ((x + y)*(x + y + 1)/2) + y

I'll keep working the outline/plan ...

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> Date: [05-06-2019 14:22:37] <6 May 2019 14:22:37 -0700>
> From: Paul Eggert <address@hidden>
> To: Keith David Bershatsky <address@hidden>
> Cc: address@hidden
> Subject: Re: How to quickly compare equality of structs ...
> 
> On 5/6/19 1:40 PM, Keith David Bershatsky wrote:
> > C provides no method for comparing equality of structs
> 
> You can compare each member of the struct yourself. Or you can use
> memset to clear all the bytes in the struct (including padding bytes)
> before initializing the struct members, and then use memcmp on the result.
> 
> > Based on my limited experience with hash tables in Lisp, I am unable to 
> > visualize how I could use such a table in C to do my comparison for each 
> > fake cursor ....
> 
> I'm sure there's a way.