Parser number conversion LOCALE bug

[simoneruffini]

I found a "bug" in the parsing of numbers. As of now the parsing is handled by the following line:

CANdb/src/dbcparser.cpp

Line 159 in 150c42a

auto number = std::stod(std::string{ sv.token() });

The problem is that std::stod converts data using your locale hrence if your locale has the comma (,) as the decimal separator the parsing will not work correctly since the DBC standard uses the dot ..
My locale is it_IT.UTF-8 and unfortunately the decimal separator is the comma.
When CANdb parses the following signal in the dbc file:

SG_ HVB_tCellMean : 23|16@0+ (0.01,-273.15) [-40|105] "degC" Charger,VCU

It will parse factor=0 instead of 0.04 and offset=-273 instead of -273.15

I changed my environment variable when using CANdb to en_US-UTF.8 and now it works.

I think the solution is to define the parsing locale in the libary itself or better: change the conversion function to not use locale at all.