Pioneer: Re: Savefile upgrades - a modest proposal

From: Robert Norris
To: pioneer-dev@pioneerspacesim.net
Subject: Re: Savefile upgrades - a modest proposal
Date: Wednesday, December 19, 2012 11:09 PM

On Wed, Dec 19, 2012 at 10:24:29PM +1100, Robert Norris wrote:
> To mark this in the file for the parser, we'll store a double (or
> float) as [ "d", "0x9.e0652141ef0dbf6p-3" ] (that's 1.23456789).  Its
> still relatively human-readable (maybe human-decipherable is a better
> term).

Actually the pseudo-type information isn't necessary, because you'll
retrieve this value through a GetDouble() or similar method, which knows
how to do the special handling required. So just storing as a string
will be fine.

For Lua data, just using the native JSON type information will be fine -
it maps very closely to Lua's own types. See here for what I did for the
RPC agent:

  https://github.com/robn/pioneer/blob/rpc-agent/src/LuaRPCAgent.cpp#L78

I don't think the precision requirement for Lua data is quite as
important, so the standard JSON double stuff should be just fine for
that.