File content as of revision 46:4cb96ab2d1c8:

/******************************************************************************
 *
 * File:                SetpointControl.cpp
 * Desciption:          ICE Setpoint Control Class implementation
 *
 *****************************************************************************/
#include "SetpointControl.h"
#include "mDot.h"
#include "MbedJSONValue.h"
#include <string>

extern mDot *GLOBAL_mdot;

bool SetpointControl::load(string _controlFile)
{
    MbedJSONValue json_value;           // JSON parsing element 
    controlFile = _controlFile;    
 
    // try to open the control file
    mDot::mdot_file file = GLOBAL_mdot->openUserFile(controlFile.c_str(), mDot::FM_RDONLY);
    if ( file.fd < 0 ) 
        return false;

    // read the data into a buffer
    char dataBuf[1024];

    int bytes_read = GLOBAL_mdot->readUserFile(file, (void *)dataBuf, sizeof(dataBuf));
    if ( bytes_read != sizeof(dataBuf) ) {
        logError("%s: failed to read %d bytes from %s", __func__, sizeof(dataBuf), controlFile.c_str());
        // we can't throw exceptions in mbed, so just return false. the calling function will
        // destroy the object 
        return false;
    }
    
    // close the file 
    GLOBAL_mdot->closeUserFile(file);

    // parse the json data 
    parse(json_value, dataBuf);
    
    id              = json_value["id"].get<string>();
    name            = json_value["name"].get<string>();
    priority        = atoi(json_value["priority"].get<string>().c_str());
    input           = json_value["input"].get<string>();
    output          = json_value["output"].get<string>();
    productFactor   = atof(json_value["prodfact"].get<string>().c_str());
    highAlert       = atof(json_value["halert"].get<string>().c_str());
    lowAlert        = atof(json_value["lalert"].get<string>().c_str());
    highFailsafe    = atof(json_value["hfs"].get<string>().c_str());
    lowFailsafe     = atof(json_value["lfs"].get<string>().c_str());
    tol             = atof(json_value["tol"].get<string>().c_str());

    return true;
}