blob: 8e418c8c90a4ed965723cc803e751fe6f9140b07 (
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
|
// Copyright (C) 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "icing/index/hit/doc-hit-info.h"
#include "icing/legacy/core/icing-string-util.h"
namespace icing {
namespace lib {
bool DocHitInfo::operator<(const DocHitInfo& other) const {
if (document_id() != other.document_id()) {
// Sort by document_id descending. This mirrors how the individual hits that
// are collapsed into this DocHitInfo would sort with other hits -
// document_ids are inverted when encoded in hits. Hits are encoded this way
// because they are appended to posting lists and the most recent value
// appended to a posting list must have the smallest encoded value of any
// hit on the posting list.
return document_id() > other.document_id();
}
if (hit_section_ids_mask() != other.hit_section_ids_mask()) {
return hit_section_ids_mask() < other.hit_section_ids_mask();
}
// Doesn't matter which way we compare this array, as long as
// DocHitInfo is unequal when it is unequal.
return memcmp(hit_term_frequency_, other.hit_term_frequency_,
sizeof(hit_term_frequency_)) < 0;
}
void DocHitInfo::UpdateSection(SectionId section_id,
Hit::TermFrequency hit_term_frequency) {
SectionIdMask section_id_mask = (1u << section_id);
if ((hit_section_ids_mask() & section_id_mask)) {
// If the sectionId is already embedded in the hit_section_ids_mask,
// then the term frequencies should always match. So there is no
// need to update anything.
return;
}
hit_term_frequency_[section_id] = hit_term_frequency;
hit_section_ids_mask_ |= section_id_mask;
}
void DocHitInfo::MergeSectionsFrom(const DocHitInfo& other) {
SectionIdMask other_mask = other.hit_section_ids_mask();
while (other_mask) {
SectionId section_id = __builtin_ctz(other_mask);
UpdateSection(section_id, other.hit_term_frequency(section_id));
other_mask &= ~(1u << section_id);
}
}
} // namespace lib
} // namespace icing
|
