64 lines
2.1 KiB
C++
64 lines
2.1 KiB
C++
/*
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**********************************************************************
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* Copyright (C) 2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Date Name Description
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* 05/24/01 aliu Creation.
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**********************************************************************
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*/
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#include "unicode/xformtrn.h"
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#include "unicode/unifilt.h"
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U_NAMESPACE_BEGIN
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/**
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* Constructs a transliterator. For use by subclasses.
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*/
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TransformTransliterator::TransformTransliterator(const UnicodeString& id,
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UnicodeFilter* adoptedFilter) :
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Transliterator(id, adoptedFilter) {
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}
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/**
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* Implements {@link Transliterator#handleTransliterate}.
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*/
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void TransformTransliterator::handleTransliterate(Replaceable& text, UTransPosition& offsets,
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UBool isIncremental) const {
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int32_t start;
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for (start = offsets.start; start < offsets.limit; ++start) {
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// Scan for the first character that is != its transform.
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// If there are none, we fall out without doing anything.
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UChar32 c = text.charAt(start);
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if (hasTransform(c)) {
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// There is a transforming character at start.
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int32_t len = offsets.limit - start;
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// assert(len >= 1);
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// Temporary string used to do transformations
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UnicodeString str;
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for (int32_t i=start; i<offsets.limit; ++i) {
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str.append(text.charAt(i));
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}
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// Transform the characters
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transform(str);
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text.handleReplaceBetween(start, start + len, str);
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start += str.length();
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int32_t lenDelta = str.length() - len;
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offsets.limit += lenDelta;
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offsets.contextLimit += lenDelta;
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offsets.start = offsets.limit;
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return;
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}
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}
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// assert(start == offsets.limit);
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offsets.start = offsets.limit;
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}
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U_NAMESPACE_END
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