blob: be6287a3c7ad0fb10dd5d455a28b92c1426e0f27 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997-2003
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: cxx_multi.cpp,v 1.3 2003/02/22 01:25:43 merrells Exp $";
#endif /* not lint */
#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);
}
|
