390 lines
14 KiB
C++
390 lines
14 KiB
C++
/*
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**********************************************************************
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* Copyright (C) 2001 IBM and others. All rights reserved.
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**********************************************************************
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* Date Name Description
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* 03/22/2000 helena Creation.
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**********************************************************************
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*/
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#include "unicode/stsearch.h"
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#include "cmemory.h"
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#include "usrchimp.h"
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// public constructors and destructors -----------------------------------
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StringSearch::StringSearch(const UnicodeString &pattern,
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const UnicodeString &text,
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const Locale &locale,
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BreakIterator *breakiter,
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UErrorCode &status) :
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SearchIterator(text, breakiter),
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m_collator_(),
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m_pattern_(pattern)
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{
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m_strsrch_ = usearch_open(m_pattern_.fArray, m_pattern_.fLength,
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m_text_.fArray, m_text_.fLength,
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locale.getName(), NULL, &status);
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uprv_free(m_search_);
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m_search_ = NULL;
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if (U_SUCCESS(status)) {
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int32_t length;
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const UChar *rules = ucol_getRules(m_strsrch_->collator, &length);
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m_collation_rules_.setTo(rules, length);
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m_collator_.setUCollator((UCollator *)m_strsrch_->collator,
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&m_collation_rules_);
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// m_search_ has been created by the base SearchIterator class
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m_search_ = m_strsrch_->search;
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}
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}
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StringSearch::StringSearch(const UnicodeString &pattern,
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const UnicodeString &text,
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RuleBasedCollator *coll,
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BreakIterator *breakiter,
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UErrorCode &status) :
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SearchIterator(text, breakiter),
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m_collator_(),
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m_pattern_(pattern)
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{
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if (coll == NULL) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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m_strsrch_ = NULL;
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return;
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}
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m_strsrch_ = usearch_openFromCollator(m_pattern_.fArray,
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m_pattern_.fLength, m_text_.fArray,
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m_text_.fLength, coll->ucollator,
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NULL, &status);
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uprv_free(m_search_);
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m_search_ = NULL;
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if (U_SUCCESS(status)) {
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int32_t length;
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const UChar *rules = ucol_getRules(m_strsrch_->collator, &length);
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m_collation_rules_.setTo(rules, length);
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m_collator_.setUCollator((UCollator *)m_strsrch_->collator,
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&m_collation_rules_);
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// m_search_ has been created by the base SearchIterator class
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m_search_ = m_strsrch_->search;
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}
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}
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StringSearch::StringSearch(const UnicodeString &pattern,
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CharacterIterator &text,
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const Locale &locale,
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BreakIterator *breakiter,
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UErrorCode &status) :
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SearchIterator(text, breakiter),
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m_collator_(),
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m_pattern_(pattern)
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{
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m_strsrch_ = usearch_open(m_pattern_.fArray, m_pattern_.fLength,
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m_text_.fArray, m_text_.fLength,
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locale.getName(), NULL, &status);
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uprv_free(m_search_);
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m_search_ = NULL;
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if (U_SUCCESS(status)) {
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int32_t length;
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const UChar *rules = ucol_getRules(m_strsrch_->collator, &length);
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m_collation_rules_.setTo(rules, length);
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m_collator_.setUCollator((UCollator *)m_strsrch_->collator,
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&m_collation_rules_);
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// m_search_ has been created by the base SearchIterator class
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m_search_ = m_strsrch_->search;
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}
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}
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StringSearch::StringSearch(const UnicodeString &pattern,
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CharacterIterator &text,
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RuleBasedCollator *coll,
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BreakIterator *breakiter,
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UErrorCode &status) :
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SearchIterator(text, breakiter),
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m_collator_(),
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m_pattern_(pattern)
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{
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if (coll == NULL) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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m_strsrch_ = NULL;
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return;
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}
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m_strsrch_ = usearch_openFromCollator(m_pattern_.fArray,
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m_pattern_.fLength, m_text_.fArray,
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m_text_.fLength, coll->ucollator,
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NULL, &status);
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uprv_free(m_search_);
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m_search_ = NULL;
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if (U_SUCCESS(status)) {
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int32_t length;
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const UChar *rules = ucol_getRules(m_strsrch_->collator, &length);
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m_collation_rules_.setTo(rules, length);
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m_collator_.setUCollator((UCollator *)m_strsrch_->collator,
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&m_collation_rules_);
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// m_search_ has been created by the base SearchIterator class
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m_search_ = m_strsrch_->search;
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}
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}
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StringSearch::StringSearch(const StringSearch &that) :
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SearchIterator(that.m_text_, that.m_breakiterator_),
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m_collator_(),
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m_pattern_(that.m_pattern_)
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{
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UErrorCode status = U_ZERO_ERROR;
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if (that.m_strsrch_ == NULL) {
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m_strsrch_ = NULL;
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status = U_ILLEGAL_ARGUMENT_ERROR;
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}
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else {
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m_strsrch_ = usearch_openFromCollator(m_pattern_.fArray,
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m_pattern_.fLength,
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m_text_.fArray, m_text_.fLength,
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that.m_strsrch_->collator,
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NULL, &status);
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}
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uprv_free(m_search_);
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m_search_ = NULL;
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if (U_SUCCESS(status)) {
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int32_t length;
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const UChar *rules = ucol_getRules(m_strsrch_->collator, &length);
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m_collation_rules_.setTo(rules, length);
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m_collator_.setUCollator((UCollator *)m_strsrch_->collator,
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&m_collation_rules_);
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// m_search_ has been created by the base SearchIterator class
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m_search_ = m_strsrch_->search;
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m_breakiterator_ = that.m_breakiterator_;
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}
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}
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StringSearch::~StringSearch()
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{
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if (m_strsrch_ != NULL) {
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usearch_close(m_strsrch_);
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m_search_ = NULL;
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}
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}
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// operator overloading ---------------------------------------------
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StringSearch & StringSearch::operator=(const StringSearch &that)
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{
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if ((*this) != that) {
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UErrorCode status = U_ZERO_ERROR;
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m_text_ = that.m_text_;
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m_breakiterator_ = that.m_breakiterator_;
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m_pattern_ = that.m_pattern_;
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// all m_search_ in the parent class is linked up with m_strsrch_
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usearch_close(m_strsrch_);
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m_strsrch_ = usearch_openFromCollator(m_pattern_.fArray,
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m_pattern_.fLength,
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m_text_.fArray,
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m_text_.fLength,
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that.m_strsrch_->collator,
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NULL, &status);
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int32_t length;
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const UChar *rules = ucol_getRules(m_strsrch_->collator, &length);
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m_collation_rules_.setTo(rules, length);
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m_collator_.setUCollator((UCollator *)m_strsrch_->collator,
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&m_collation_rules_);
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m_search_ = m_strsrch_->search;
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}
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return *this;
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}
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UBool StringSearch::operator==(const SearchIterator &that) const
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{
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if (this == &that) {
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return TRUE;
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}
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if (SearchIterator::operator ==(that)) {
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StringSearch &thatsrch = (StringSearch &)that;
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return (this->m_pattern_ == thatsrch.m_pattern_ &&
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this->m_strsrch_->collator == thatsrch.m_strsrch_->collator);
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}
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return FALSE;
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}
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// public get and set methods ----------------------------------------
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void StringSearch::setOffset(UTextOffset position, UErrorCode &status)
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{
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usearch_setOffset(m_strsrch_, position, &status);
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}
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UTextOffset StringSearch::getOffset(void) const
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{
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return usearch_getOffset(m_strsrch_);
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}
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void StringSearch::setText(const UnicodeString &text, UErrorCode &status)
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{
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m_text_ = text;
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usearch_setText(m_strsrch_, text.fArray, text.fLength, &status);
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}
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void StringSearch::setText(CharacterIterator &text, UErrorCode &status)
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{
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text.getText(m_text_);
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usearch_setText(m_strsrch_, m_text_.fArray, m_text_.fLength, &status);
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}
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RuleBasedCollator * StringSearch::getCollator() const
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{
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return (RuleBasedCollator *)&m_collator_;
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}
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void StringSearch::setCollator(RuleBasedCollator *coll, UErrorCode &status)
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{
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usearch_setCollator(m_strsrch_, coll->getUCollator(), &status);
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m_collation_rules_.setTo(coll->getRules());
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m_collator_.setUCollator((UCollator *)m_strsrch_->collator,
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&m_collation_rules_);
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}
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void StringSearch::setPattern(const UnicodeString &pattern,
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UErrorCode &status)
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{
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m_pattern_ = pattern;
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usearch_setPattern(m_strsrch_, m_pattern_.fArray, m_pattern_.fLength,
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&status);
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}
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const UnicodeString & StringSearch::getPattern() const
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{
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return m_pattern_;
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}
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// public methods ----------------------------------------------------
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void StringSearch::reset()
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{
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usearch_reset(m_strsrch_);
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}
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SearchIterator * StringSearch::safeClone(void) const
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{
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UErrorCode status = U_ZERO_ERROR;
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StringSearch *result = new StringSearch(m_pattern_, m_text_,
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(RuleBasedCollator *)&m_collator_,
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m_breakiterator_,
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status);
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result->setOffset(getOffset(), status);
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result->setMatchStart(m_strsrch_->search->matchedIndex);
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result->setMatchLength(m_strsrch_->search->matchedLength);
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if (U_FAILURE(status)) {
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return NULL;
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}
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return result;
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}
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// protected method -------------------------------------------------
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UTextOffset StringSearch::handleNext(int32_t position, UErrorCode &status)
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{
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// values passed here are already in the pre-shift position
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if (U_SUCCESS(status)) {
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if (m_strsrch_->pattern.CELength == 0) {
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m_search_->matchedIndex =
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m_search_->matchedIndex == USEARCH_DONE ?
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getOffset() : m_search_->matchedIndex + 1;
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m_search_->matchedLength = 0;
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ucol_setOffset(m_strsrch_->textIter, m_search_->matchedIndex,
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&status);
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if (m_search_->matchedIndex == m_search_->textLength) {
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m_search_->matchedIndex = USEARCH_DONE;
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}
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}
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else {
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// looking at usearch.cpp, this part is shifted out to
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// StringSearch instead of SearchIterator because m_strsrch_ is
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// not accessible in SearchIterator
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if (!m_search_->isOverlap &&
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position + m_strsrch_->pattern.defaultShiftSize >
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m_search_->textLength) {
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setMatchNotFound();
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return USEARCH_DONE;
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}
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while (TRUE) {
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if (m_search_->isCanonicalMatch) {
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// can't use exact here since extra accents are allowed.
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usearch_handleNextCanonical(m_strsrch_, &status);
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}
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else {
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usearch_handleNextExact(m_strsrch_, &status);
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}
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if (U_FAILURE(status)) {
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return USEARCH_DONE;
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}
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if (m_breakiterator_ == NULL ||
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m_search_->matchedIndex == USEARCH_DONE ||
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(m_breakiterator_->isBoundary(m_search_->matchedIndex) &&
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m_breakiterator_->isBoundary(m_search_->matchedIndex +
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m_search_->matchedLength))) {
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return m_search_->matchedIndex;
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}
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}
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}
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}
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return USEARCH_DONE;
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}
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UTextOffset StringSearch::handlePrev(int32_t position, UErrorCode &status)
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{
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// values passed here are already in the pre-shift position
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if (U_SUCCESS(status)) {
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if (m_strsrch_->pattern.CELength == 0) {
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m_search_->matchedIndex =
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(m_search_->matchedIndex == USEARCH_DONE ? getOffset() :
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m_search_->matchedIndex);
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if (m_search_->matchedIndex == 0) {
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setMatchNotFound();
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}
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else {
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m_search_->matchedIndex --;
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ucol_setOffset(m_strsrch_->textIter, m_search_->matchedIndex,
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&status);
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m_search_->matchedLength = 0;
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}
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}
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else {
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// looking at usearch.cpp, this part is shifted out to
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// StringSearch instead of SearchIterator because m_strsrch_ is
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// not accessible in SearchIterator
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if (!m_search_->isOverlap &&
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position - m_strsrch_->pattern.defaultShiftSize < 0) {
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setMatchNotFound();
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return USEARCH_DONE;
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}
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while (TRUE) {
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if (m_search_->isCanonicalMatch) {
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// can't use exact here since extra accents are allowed.
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usearch_handlePreviousCanonical(m_strsrch_, &status);
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}
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else {
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usearch_handlePreviousExact(m_strsrch_, &status);
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}
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if (U_FAILURE(status)) {
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return USEARCH_DONE;
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}
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if (m_breakiterator_ == NULL ||
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m_search_->matchedIndex == USEARCH_DONE ||
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(m_breakiterator_->isBoundary(m_search_->matchedIndex) &&
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m_breakiterator_->isBoundary(m_search_->matchedIndex +
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m_search_->matchedLength))) {
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return m_search_->matchedIndex;
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}
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}
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}
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return m_search_->matchedIndex;
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}
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return USEARCH_DONE;
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}
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