Initial work on expression evaluation

[triptec]

Running when v1=229,v2=230,v3=231 rtl_433 -Xn=LOLZ,m=OOK_PPM,s=256,l=508,g=520,r=1520,preamble={119}000000000000000000000000000000,get=@0:{8}:length,get=@8:{8}:crc,get=@16:{8}:seq,get=@24:{8}:v1,get=@32:{8}:v2,get=@40:{8}:(value/10+230):v3 -r g001_433.92M_250k.cu8

time      : @0.312192s
model     : LOLZ         count     : 1             num_rows  : 2             rows      : 
len       : 0            data      :               length    : 0             crc       : 0             seq       : 0             v1        : 0             v2        : 0             v3        : 230.000, 
len       : 48           data      : 03565ae5e6e7  length    : 3             crc       : 86            seq       : 90            v1        : 229           v2        : 230           v3        : 253.100
codes     : {0}, {48}03565ae5e6e7

Would it be okay to use tinyexpr? It seems it also have support for passing functions into the evaluator so making things like rh_6to4 or other functions that would be useful in the evaluation of things.

I just got it to compile so stuff that just been copy pasted but I don't want to clean up unless you think I should continue.

[zuckschwerdt]

Yes, embedded ("header-only") libs will be okay.

[triptec]

So looking at the radiohead code I don't think it's going to be nice solution just using expressions. You guys might already come to that conclusion.