NAME
sc_check_sw - Check return status from a card transaction
SYNOPSIS
#include <opensc.h>
int sc_check_sw(struct sc_card *card, int sw1, int sw2);
DESCRIPTION
This function checks the return status as given in sw1 and sw2 against
the card-specific errors of card. These are set by sc_transmit_apdu()
in the apdu.sw1 and apdu.sw2 fields, respectively.
The function should be called after every APDU transmission, to convert
the card's status code to an OpenSC error code.
RETURN VALUE
Returns 0 if successful, or a negative value in case of error.