#define TDB1_CONV(x) (TDB1_DOCONV() ? tdb1_convert(&x, sizeof(x)) : &x)
/* the body of the database is made of one tdb1_record for the free space
#define TDB1_CONV(x) (TDB1_DOCONV() ? tdb1_convert(&x, sizeof(x)) : &x)
/* the body of the database is made of one tdb1_record for the free space