/** The BUS_next function does a general search. This function
continues from the previous search state (held in struct device_search). The search state
can be reset by using the BUS_first function.
Returns: 0=No problems, 1=Problems
Sets LastDevice=1 if no more
*/
enum search_status BUS_next(struct device_search *ds, const struct parsedname *pn)
{
switch ( BUS_next_3try(ds, pn) ) {
case search_good:
// found a device in a directory search, add to "presence" cache
LEVEL_DEBUG("Device found: " SNformat, SNvar(ds->sn));
Cache_Add_Device(pn->selected_connection->index,ds->sn) ;
return search_good ;
case search_done:
BUS_next_cleanup(ds);
return search_done;
case search_error:
default:
BUS_next_cleanup(ds);
return search_error;
}
}
static GOOD_OR_BAD PresenceFromDirblob( struct parsedname * pn )
{
struct dirblob db; // cached dirblob
if ( GOOD( Cache_Get_Dir( &db , pn ) ) ) {
// Use the dirblob from the cache
GOOD_OR_BAD ret = ( DirblobSearch(pn->sn, &db ) >= 0 ) ? gbGOOD : gbBAD ;
DirblobClear( &db ) ;
return ret ;
} else {
// look through actual directory
struct device_search ds ;
enum search_status nextboth = BUS_first( &ds, pn ) ;
while ( nextboth == search_good ) {
if ( memcmp( ds.sn, pn->sn, SERIAL_NUMBER_SIZE ) == 0 ) {
// found it. Early exit.
BUS_next_cleanup( &ds );
return gbGOOD ;
}
// Not found. Clean up done by BUS_next in this case
nextboth = BUS_next( &ds, pn ) ;
}
return gbBAD ;
}
}
