#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: cxx_multi.cpp,v 1.2 2004/03/30 01:21:24 jtownsen Exp $";
#endif
#include "db_cxx.h"
DbMultipleIterator::DbMultipleIterator(const Dbt &dbt)
: data_((u_int8_t*)dbt.get_data()),
p_((u_int32_t*)(data_ + dbt.get_size() - sizeof(u_int32_t)))
{
}
bool DbMultipleDataIterator::next(Dbt &data)
{
if (*p_ == (u_int32_t)-1) {
data.set_data(0);
data.set_size(0);
p_ = 0;
} else {
data.set_data(data_ + *p_--);
data.set_size(*p_--);
if (data.get_size() == 0 && data.get_data() == data_)
data.set_data(0);
}
return (data.get_data() != 0);
}
bool DbMultipleKeyDataIterator::next(Dbt &key, Dbt &data)
{
if (*p_ == (u_int32_t)-1) {
key.set_data(0);
key.set_size(0);
data.set_data(0);
data.set_size(0);
p_ = 0;
} else {
key.set_data(data_ + *p_--);
key.set_size(*p_--);
data.set_data(data_ + *p_--);
data.set_size(*p_--);
}
return (data.get_data() != 0);
}
bool DbMultipleRecnoDataIterator::next(db_recno_t &recno, Dbt &data)
{
if (*p_ == (u_int32_t)0) {
recno = 0;
data.set_data(0);
data.set_size(0);
p_ = 0;
} else {
recno = *p_--;
data.set_data(data_ + *p_--);
data.set_size(*p_--);
}
return (recno != 0);
}