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65 lines
1.3 KiB
C++
65 lines
1.3 KiB
C++
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997-2005
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* Sleepycat Software. All rights reserved.
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*
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* $Id: cxx_multi.cpp,v 12.3 2005/09/30 07:40:20 mjc Exp $
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*/
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#include "db_config.h"
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#include "db_cxx.h"
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DbMultipleIterator::DbMultipleIterator(const Dbt &dbt)
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: data_((u_int8_t*)dbt.get_data()),
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p_((u_int32_t*)(data_ + dbt.get_size() - sizeof(u_int32_t)))
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{
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}
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bool DbMultipleDataIterator::next(Dbt &data)
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{
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if (*p_ == (u_int32_t)-1) {
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data.set_data(0);
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data.set_size(0);
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p_ = 0;
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} else {
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data.set_data(data_ + *p_--);
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data.set_size(*p_--);
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if (data.get_size() == 0 && data.get_data() == data_)
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data.set_data(0);
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}
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return (p_ != 0);
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}
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bool DbMultipleKeyDataIterator::next(Dbt &key, Dbt &data)
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{
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if (*p_ == (u_int32_t)-1) {
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key.set_data(0);
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key.set_size(0);
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data.set_data(0);
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data.set_size(0);
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p_ = 0;
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} else {
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key.set_data(data_ + *p_--);
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key.set_size(*p_--);
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data.set_data(data_ + *p_--);
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data.set_size(*p_--);
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}
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return (p_ != 0);
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}
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bool DbMultipleRecnoDataIterator::next(db_recno_t &recno, Dbt &data)
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{
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if (*p_ == (u_int32_t)0) {
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recno = 0;
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data.set_data(0);
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data.set_size(0);
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p_ = 0;
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} else {
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recno = *p_--;
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data.set_data(data_ + *p_--);
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data.set_size(*p_--);
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}
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return (p_ != 0);
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}
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