1 /** @file
2 * @brief A vector-like container of terms which can be iterated.
3 */
4 /* Copyright (C) 2011,2015 Olly Betts
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of the
9 * License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <config.h>
22
23 #include "vectortermlist.h"
24
25 #include "net/length.h"
26 #include "omassert.h"
27 #include "xapian/error.h"
28
29 using namespace std;
30
31 Xapian::termcount
get_approx_size() const32 VectorTermList::get_approx_size() const
33 {
34 return num_terms;
35 }
36
37 string
get_termname() const38 VectorTermList::get_termname() const
39 {
40 // Check we've started but not reached the end.
41 Assert(p != data.data());
42 Assert(!VectorTermList::at_end());
43 return current_term;
44 }
45
46 Xapian::termcount
get_wdf() const47 VectorTermList::get_wdf() const
48 {
49 // Check we've started but not reached the end.
50 Assert(p != data.data());
51 Assert(!VectorTermList::at_end());
52 return 1;
53 }
54
55 Xapian::doccount
get_termfreq() const56 VectorTermList::get_termfreq() const
57 {
58 throw Xapian::InvalidOperationError("VectorTermList::get_termfreq() not meaningful");
59 }
60
61 TermList *
next()62 VectorTermList::next()
63 {
64 // Check we've not reached the end.
65 Assert(!VectorTermList::at_end());
66
67 const char * end = data.data() + data.size();
68 if (p == end) {
69 current_term.resize(0);
70 p = NULL;
71 } else {
72 size_t len;
73 decode_length_and_check(&p, end, len);
74 current_term.assign(p, len);
75 p += len;
76 }
77
78 return NULL;
79 }
80
81 TermList *
skip_to(const string &)82 VectorTermList::skip_to(const string &)
83 {
84 // skip_to only makes sense for termlists which are in sorted order.
85 throw Xapian::InvalidOperationError("VectorTermList::skip_to() not meaningful");
86 }
87
88 bool
at_end() const89 VectorTermList::at_end() const
90 {
91 return p == NULL;
92 }
93
94 Xapian::termcount
positionlist_count() const95 VectorTermList::positionlist_count() const
96 {
97 throw Xapian::InvalidOperationError("VectorTermList::positionlist_count() not meaningful");
98 }
99
100 Xapian::PositionIterator
positionlist_begin() const101 VectorTermList::positionlist_begin() const
102 {
103 throw Xapian::InvalidOperationError("VectorTermList::positionlist_begin() not meaningful");
104 }
105