305 lines
10 KiB
C++
305 lines
10 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 1996-1999, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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*******************************************************************************
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*/
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/*
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* File coleitr.cpp
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*
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*
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*
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* Created by: Helena Shih
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*
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* Modification History:
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*
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* Date Name Description
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*
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* 6/23/97 helena Adding comments to make code more readable.
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* 08/03/98 erm Synched with 1.2 version of CollationElementIterator.java
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* 12/10/99 aliu Ported Thai collation support from Java.
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* 01/25/01 swquek Modified to a C++ wrapper calling C APIs (ucoliter.h)
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* 02/19/01 swquek Removed CollationElementsIterator() since it is
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* private constructor and no calls are made to it
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*/
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#include "unicode/coleitr.h"
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#include "ucol_imp.h"
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#include "cmemory.h"
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/* Constants --------------------------------------------------------------- */
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/* synwee : public can't remove */
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int32_t const CollationElementIterator::NULLORDER = 0xffffffff;
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/* CollationElementIterator public constructor/destructor ------------------ */
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CollationElementIterator::CollationElementIterator(
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const CollationElementIterator& other)
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: isDataOwned_(TRUE)
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{
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UErrorCode status = U_ZERO_ERROR;
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m_data_ = ucol_openElements(other.m_data_->iteratordata_.coll, NULL, 0, &status);
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*this = other;
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}
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CollationElementIterator::~CollationElementIterator()
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{
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if (isDataOwned_) {
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ucol_closeElements(m_data_);
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}
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}
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/* CollationElementIterator public methods --------------------------------- */
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UTextOffset CollationElementIterator::getOffset() const
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{
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return ucol_getOffset(m_data_);
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}
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/**
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* Get the ordering priority of the next character in the string.
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* @return the next character's ordering. Returns NULLORDER if an error has
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* occured or if the end of string has been reached
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*/
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int32_t CollationElementIterator::next(UErrorCode& status)
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{
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return ucol_next(m_data_, &status);
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}
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UBool CollationElementIterator::operator!=(
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const CollationElementIterator& other) const
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{
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return !(*this == other);
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}
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UBool CollationElementIterator::operator==(
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const CollationElementIterator& that) const
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{
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if (this == &that)
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return TRUE;
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if (m_data_ == that.m_data_)
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return TRUE;
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return (this->m_data_->normalization_ == that.m_data_->normalization_ &&
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this->m_data_->length_ == that.m_data_->length_ &&
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this->m_data_->reset_ == that.m_data_->reset_ &&
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uprv_memcmp(this->m_data_->iteratordata_.string,
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that.m_data_->iteratordata_.string,
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this->m_data_->length_) == 0 &&
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this->getOffset() == that.getOffset() &&
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this->m_data_->iteratordata_.isThai == that.m_data_->iteratordata_.isThai &&
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this->m_data_->iteratordata_.coll == that.m_data_->iteratordata_.coll);
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}
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/**
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* Get the ordering priority of the previous collation element in the string.
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* @param status the error code status.
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* @return the previous element's ordering. Returns NULLORDER if an error has
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* occured or if the start of string has been reached.
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*/
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int32_t CollationElementIterator::previous(UErrorCode& status)
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{
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return ucol_previous(m_data_, &status);
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}
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/**
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* Resets the cursor to the beginning of the string.
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*/
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void CollationElementIterator::reset()
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{
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ucol_reset(m_data_);
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}
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void CollationElementIterator::setOffset(UTextOffset newOffset,
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UErrorCode& status)
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{
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ucol_setOffset(m_data_, newOffset, &status);
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}
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/**
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* Sets the source to the new source string.
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*/
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void CollationElementIterator::setText(const UnicodeString& source,
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UErrorCode& status)
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{
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if (U_FAILURE(status))
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return;
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int32_t length = source.length();
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UChar *string = new UChar[length];
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source.extract(0, length, string);
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m_data_->length_ = length;
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if (m_data_->iteratordata_.isWritable &&
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m_data_->iteratordata_.string != NULL)
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uprv_free(m_data_->iteratordata_.string);
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init_collIterate(m_data_->iteratordata_.coll, string, length, &m_data_->iteratordata_, TRUE);
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}
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// Sets the source to the new character iterator.
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void CollationElementIterator::setText(CharacterIterator& source,
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UErrorCode& status)
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{
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if (U_FAILURE(status))
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return;
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int32_t length = source.getLength();
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UChar *buffer = new UChar[length];
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/*
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Using this constructor will prevent buffer from being removed when
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string gets removed
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*/
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UnicodeString string;
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source.getText(string);
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string.extract(0, length, buffer);
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m_data_->length_ = length;
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if (m_data_->iteratordata_.isWritable &&
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m_data_->iteratordata_.string != NULL)
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uprv_free(m_data_->iteratordata_.string);
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init_collIterate(m_data_->iteratordata_.coll, buffer, length, &m_data_->iteratordata_, TRUE);
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}
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int32_t CollationElementIterator::strengthOrder(int32_t order) const
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{
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UCollationStrength s = ucol_getStrength(m_data_->iteratordata_.coll);
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// Mask off the unwanted differences.
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if (s == UCOL_PRIMARY)
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order &= RuleBasedCollator::PRIMARYDIFFERENCEONLY;
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else
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if (s == UCOL_SECONDARY)
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order &= RuleBasedCollator::SECONDARYDIFFERENCEONLY;
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return order;
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}
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/* CollationElementIterator private constructors/destructors --------------- */
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/*
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This private method will never be called, but it makes the linker happy
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CollationElementIterator::CollationElementIterator() : m_data_(0)
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{
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}
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*/
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CollationElementIterator::CollationElementIterator(
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const RuleBasedCollator* order)
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: isDataOwned_(TRUE)
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{
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UErrorCode status = U_ZERO_ERROR;
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m_data_ = ucol_openElements(order->ucollator, NULL, 0, &status);
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}
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/**
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* This is the "real" constructor for this class; it constructs an iterator
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* over the source text using the specified collator
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*/
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CollationElementIterator::CollationElementIterator(
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const UnicodeString& sourceText,
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const RuleBasedCollator* order,
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UErrorCode& status)
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: isDataOwned_(TRUE)
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{
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if (U_FAILURE(status))
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return;
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int32_t length = sourceText.length();
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UChar *string = new UChar[length];
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/*
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Using this constructor will prevent buffer from being removed when
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string gets removed
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*/
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sourceText.extract(0, length, string);
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m_data_ = ucol_openElements(order->ucollator, string, length, &status);
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m_data_->iteratordata_.isWritable = TRUE;
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}
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/**
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* This is the "real" constructor for this class; it constructs an iterator over
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* the source text using the specified collator
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*/
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CollationElementIterator::CollationElementIterator(
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const CharacterIterator& sourceText,
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const RuleBasedCollator* order,
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UErrorCode& status)
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: isDataOwned_(TRUE)
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{
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if (U_FAILURE(status))
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return;
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// **** should I just drop this test? ****
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/*
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if ( sourceText.endIndex() != 0 )
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{
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// A CollationElementIterator is really a two-layered beast.
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// Internally it uses a Normalizer to munge the source text into a form
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// where all "composed" Unicode characters (such as <20>) are split into a
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// normal character and a combining accent character.
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// Afterward, CollationElementIterator does its own processing to handle
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// expanding and contracting collation sequences, ignorables, and so on.
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Normalizer::EMode decomp = order->getStrength() == Collator::IDENTICAL
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? Normalizer::NO_OP : order->getDecomposition();
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text = new Normalizer(sourceText, decomp);
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if (text == NULL)
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status = U_MEMORY_ALLOCATION_ERROR;
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}
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*/
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int32_t length = sourceText.getLength();
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UChar *buffer = new UChar[length];
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/*
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Using this constructor will prevent buffer from being removed when
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string gets removed
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*/
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UnicodeString string(buffer, length, length);
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((CharacterIterator &)sourceText).getText(string);
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string.extract(0, length, buffer);
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m_data_ = ucol_openElements(order->ucollator, buffer, length, &status);
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m_data_->iteratordata_.isWritable = TRUE;
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}
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/* CollationElementIterator private methods -------------------------------- */
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const CollationElementIterator& CollationElementIterator::operator=(
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const CollationElementIterator& other)
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{
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if (this != &other)
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{
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this->m_data_->normalization_ = other.m_data_->normalization_;
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this->m_data_->length_ = other.m_data_->length_;
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this->m_data_->reset_ = other.m_data_->reset_;
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this->m_data_->iteratordata_.string = other.m_data_->iteratordata_.string;
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this->m_data_->iteratordata_.start = other.m_data_->iteratordata_.start;
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this->m_data_->iteratordata_.len = other.m_data_->iteratordata_.len;
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this->m_data_->iteratordata_.pos = other.m_data_->iteratordata_.pos;
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this->m_data_->iteratordata_.toReturn = other.m_data_->iteratordata_.CEs +
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(other.m_data_->iteratordata_.toReturn - other.m_data_->iteratordata_.CEs);
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this->m_data_->iteratordata_.CEpos = other.m_data_->iteratordata_.CEs +
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(other.m_data_->iteratordata_.CEpos - other.m_data_->iteratordata_.CEs);
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uprv_memcpy(this->m_data_->iteratordata_.CEs, other.m_data_->iteratordata_.CEs,
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UCOL_EXPAND_CE_BUFFER_SIZE * sizeof(uint32_t));
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this->m_data_->iteratordata_.isThai = other.m_data_->iteratordata_.isThai;
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this->m_data_->iteratordata_.isWritable = other.m_data_->iteratordata_.isWritable;
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uprv_memcpy(this->m_data_->iteratordata_.stackWritableBuffer,
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other.m_data_->iteratordata_.stackWritableBuffer,
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UCOL_WRITABLE_BUFFER_SIZE * sizeof(UChar));
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/* writablebuffer is not used at the moment, not used */
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this->m_data_->iteratordata_.coll = other.m_data_->iteratordata_.coll;
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this->isDataOwned_ = FALSE;
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}
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return *this;
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}
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