2
**********************************************************************
3
* Copyright (c) 2001-2012, International Business Machines
4
* Corporation and others. All Rights Reserved.
5
**********************************************************************
6
* Date Name Description
7
* 07/18/01 aliu Creation.
8
**********************************************************************
11
#include "unicode/unifilt.h"
12
#include "unicode/rep.h"
13
#include "unicode/utf16.h"
16
UOBJECT_DEFINE_ABSTRACT_RTTI_IMPLEMENTATION(UnicodeFilter)
19
/* Define this here due to the lack of another file.
20
It can't be defined in the header */
21
UnicodeMatcher::~UnicodeMatcher() {}
23
UnicodeFilter::~UnicodeFilter() {}
27
* Note that UnicodeMatcher is a base class of UnicodeFilter.
29
UnicodeMatcher* UnicodeFilter::toMatcher() const {
30
return const_cast<UnicodeFilter *>(this);
33
void UnicodeFilter::setData(const TransliterationRuleData*) {}
36
* Default implementation of UnicodeMatcher::matches() for Unicode
37
* filters. Matches a single code point at offset (either one or
38
* two 16-bit code units).
40
UMatchDegree UnicodeFilter::matches(const Replaceable& text,
46
contains(c = text.char32At(offset))) {
47
offset += U16_LENGTH(c);
51
contains(c = text.char32At(offset))) {
52
// Backup offset by 1, unless the preceding character is a
53
// surrogate pair -- then backup by 2 (keep offset pointing at
54
// the lead surrogate).
57
offset -= U16_LENGTH(text.char32At(offset)) - 1;
61
if (incremental && offset == limit) {
62
return U_PARTIAL_MATCH;