Survex and dates

[Mark Shinwell]

On Wed, Jul 28, 2010 at 12:36:02PM +0200, Graham Mullan wrote:
> Is it going to be possible to deal with the Unix date problem and get  
> Survex to recognise dates earlier than 1970, or are we tied down by the  
> vagaries of one operating system?

I'm not sure what you mean by the Unix date problem.  The usual practice is for
the standard Unix time type (time_t) to be signed, so you can go back before
the 1970 epoch.  A 32-bit time_t permits dates from 1901..2038 and the 64-bit
version goes back older than any cave.

Mark