Function CP_Props1SI

wrappers/MathCAD/CoolPropMathcad.cpp:335–356

This code executes the user function CP_Props1SI, which is a wrapper for the CoolProp.Props1SI() function, used to simply extract a fluid-specific parameter that is not dependent on the state

// the CoolProp.Props1SI() function, used to simply extract a
// fluid-specific parameter that is not dependent on the state
static LRESULT CP_Props1SI(LPCOMPLEXSCALAR Prop,  // pointer to the result
                           LPCMCSTRING Fluid,     // string with a valid CoolProp fluid name
                           LPCMCSTRING PropName)  // a fluid property
{
    std::string PropStr(PropName->str);
    std::string FluidString = Fluid->str;

    // pass the arguments to the CoolProp.Props1() function
    Prop->real = CoolProp::Props1SI(Fluid->str, PropName->str);

    // Note: Props1SI does not throw exceptions, but instead
    // sets global parameter "errstring" and returns _HUGE.
    // Use ValidNumber(val) to see if Props1SI failed with an error message...
    if (!ValidNumber(Prop->real)) {
        std::string emsg = CoolProp::get_global_param_string("errstring");
        CoolProp::set_error_string(emsg);  // reset error string so Mathcad can retrieve it
        return HandleProps1SIError(emsg, FluidString, PropStr);
    }

    // normal return
    return 0;
}

// Helper: centralize text-matching logic for PropsSI and PhaseSI error handling
static LRESULT HandlePropsSIError(const std::string& emsg, const std::string& Prop1Name, const unsigned int o) {