/*
* call-seq:
* res.getvalue( tup_num, field_num )
*
* Returns the value in tuple number _tup_num_, field _field_num_,
* or +nil+ if the field is +NULL+.
*/
static VALUE
pgresult_getvalue(VALUE self, VALUE tup_num, VALUE field_num)
{
PGresult *result;
int i = NUM2INT(tup_num);
int j = NUM2INT(field_num);
result = get_pgresult(self);
if(i < 0 || i >= PQntuples(result)) {
rb_raise(rb_eArgError,"invalid tuple number %d", i);
}
if(j < 0 || j >= PQnfields(result)) {
rb_raise(rb_eArgError,"invalid field number %d", j);
}
if(PQgetisnull(result, i, j))
return Qnil;
return rb_tainted_str_new(PQgetvalue(result, i, j),
PQgetlength(result, i, j));
}