#define _MAX_PROTOCOL_LEN 25
#define _MAX_MODEL_LEN    25

int
tdSensor(SV* protocol_sv, SV* model_sv, SV* id_sv, SV* dataTypes_sv)
   CODE:
   {
      char protocol[_MAX_PROTOCOL_LEN + 1];
      char model[_MAX_MODEL_LEN + 1];
      int  id;
      int  dataTypes;

      RETVAL = tdSensor(
         protocol, sizeof(protocol),
         model, sizeof(model),
         &id,
         &dataTypes
      );

      if (RETVAL == TELLSTICK_SUCCESS) {
         SV* sv;
         sv = sv_2mortal(newSVpv(protocol, 0)));  SvSetMagicSV(protocol_sv,  sv);
         sv = sv_2mortal(newSVpv(model, 0));      SvSetMagicSV(model_sv,     sv);
         sv = sv_2mortal(newIV(id));              SvSetMagicSV(id_sv,        sv);
         sv = sv_2mortal(newIV(dataTypes));       SvSetMagicSV(dataTypes_sv, sv);
      } else {
         SvSetMagicSV(protocol_sv,  &PL_sv_undef);
         SvSetMagicSV(model_sv,     &PL_sv_undef);
         SvSetMagicSV(id_sv,        &PL_sv_undef);
         SvSetMagicSV(dataTypes_sv, &PL_sv_undef);
      }
   }
   OUTPUT:
       RETVAL

##</code><code>##

#define _MAX_PROTOCOL_LEN 25
#define _MAX_MODEL_LEN    25

SV*
tdSensor()
   CODE:
   {
      char protocol[_MAX_PROTOCOL_LEN + 1];
      char model[_MAX_MODEL_LEN + 1];
      int  id;
      int  dataTypes;

      int rv = tdSensor(
         protocol, sizeof(protocol),
         model, sizeof(model),
         &id,
         &dataTypes
      );

      if (rv == TELLSTICK_SUCCESS) {
         HV* hv = newHV();
         SV* sv;
 
         /* In theory, hv_stores can fail.                        */
         /* However, I suspect it can't happen for this new hash. */
         /* It it were to happen here, this code would leak.      */
         sv = newSVpv(protocol, 0);  hv_stores(hv, "protocol",  sv);
         sv = newSVpv(model, 0);     hv_stores(hv, "model",     sv);
         sv = newIV(id);             hv_stores(hv, "id",        sv);
         sv = newIV(dataTypes);      hv_stores(hv, "dataTypes", sv);

         RETVAL = newRV_noinc(MUTABLE_SV(hv));
      } else {
         RETVAL = &PL_sv_undef;
      }
   }
   OUTPUT:
       RETVAL

##</code><code>##

use feature qw( say );

while (my $rec = tdSensor()) {
   say join ', ',
      "protocol: $rec->{protocol}",
      "model: $rec->{model}",
      "sensorId: $rec->{id}",
      "dataTypes: $rec->{dataTypes}";
}