Why do you need to inherit from SoftwareSerial rather than Print? (cf http://playground.arduino.cc/Code/Printclass )
That would allow to implement a simple scheme where you would pass at initialization a pointer to either a SoftwareSerial or HardwareSerial object that would become your print target in your code and leave the choice of hardware or software serial up to the user of the library
Why do you need to inherit from SoftwareSerial rather than Print? (cf http://playground.arduino.cc/Code/Printclass )
That would allow to implement a simple scheme where you would pass at initialization a pointer to either a SoftwareSerial or HardwareSerial object that would become your print target in your code and leave the choice of hardware or software serial up to the user of the library