void
chooser::insert_device (type_id type, const scanner::info& device)
{
insert (type, device.name (), device.text (), device.udi ());
}
scanner::ptr
scanner::create (connexion::ptr cnx, const scanner::info& info)
{
if (!info.is_driver_set ())
{
log::error ("driver not known for %1% (%2%)")
% info.name ()
% info.udi ()
;
return scanner::ptr ();
}
std::string plugin = "libdrv-" + info.driver ();
lt_dlhandle handle = NULL;
scanner_factory factory = 0;
std::string error (_("driver not found"));
log::brief ("looking for preloaded '%1%' driver")
% info.driver ();
lt_dladvise advice;
lt_dladvise_init (&advice);
lt_dladvise_preload (&advice);
lt_dladvise_ext (&advice);
handle = lt_dlopenadvise (plugin.c_str (), advice);
if (handle)
{
factory = get_scanner_factory (handle);
if (factory)
{
log::brief ("using preloaded '%1%' driver")
% info.driver ();
}
else
{
lt_dlclose (handle);
}
}
lt_dladvise_destroy (&advice);
if (!factory) { // trawl the file system
run_time rt;
run_time::sequence_type search (rt.load_dirs (run_time::pkg, "driver"));
run_time::sequence_type::const_iterator it;
for (it = search.begin (); !handle && it != search.end (); ++it)
{
path p (*it);
log::brief ("looking for '%1%' driver in '%2%'")
% info.driver ()
% p.string ()
;
p /= plugin;
handle = lt_dlopenext (p.string ().c_str ());
if (handle) {
factory = get_scanner_factory (handle);
if (factory) {
log::brief ("using '%1%'") % p.string ();
} else {
error = lt_dlerror ();
lt_dlclose (handle);
handle = NULL;
}
} else {
error = lt_dlerror ();
}
}
}
if (!factory) BOOST_THROW_EXCEPTION (runtime_error (error));
scanner::ptr rv;
factory (rv, cnx);
return rv;
}