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
68
69
70
71
72
73
74
75
76
77
78
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/i18n/string_search.h"
#include "base/logging.h"
#include "unicode/usearch.h"
namespace {
bool CollationSensitiveStringSearch(const string16& find_this,
const string16& in_this,
UCollationStrength strength,
size_t* match_index,
size_t* match_length) {
UErrorCode status = U_ZERO_ERROR;
UStringSearch* search = usearch_open(find_this.data(), -1,
in_this.data(), -1,
uloc_getDefault(),
NULL, // breakiter
&status);
// Default to basic substring search if usearch fails. According to
// http://icu-project.org/apiref/icu4c/usearch_8h.html, usearch_open will fail
// if either |find_this| or |in_this| are empty. In either case basic
// substring search will give the correct return value.
if (!U_SUCCESS(status)) {
size_t index = in_this.find(find_this);
if (index == string16::npos) {
return false;
} else {
if (match_index)
*match_index = index;
if (match_length)
*match_length = find_this.size();
return true;
}
}
UCollator* collator = usearch_getCollator(search);
ucol_setStrength(collator, strength);
usearch_reset(search);
int32_t index = usearch_first(search, &status);
if (!U_SUCCESS(status) || index == USEARCH_DONE) {
usearch_close(search);
return false;
}
if (match_index)
*match_index = static_cast<size_t>(index);
if (match_length)
*match_length = static_cast<size_t>(usearch_getMatchedLength(search));
usearch_close(search);
return true;
}
} // namespace
namespace base {
namespace i18n {
bool StringSearchIgnoringCaseAndAccents(const string16& find_this,
const string16& in_this,
size_t* match_index,
size_t* match_length) {
return CollationSensitiveStringSearch(find_this,
in_this,
UCOL_PRIMARY,
match_index,
match_length);
}
} // namespace i18n
} // namespace base
|
