1659 lines
60 KiB
C++
1659 lines
60 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 1996-2015, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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* rulebasedcollator.cpp
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*
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* (replaced the former tblcoll.cpp)
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*
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* created on: 2012feb14 with new and old collation code
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* created by: Markus W. Scherer
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_COLLATION
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#include "unicode/coll.h"
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#include "unicode/coleitr.h"
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#include "unicode/localpointer.h"
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#include "unicode/locid.h"
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#include "unicode/sortkey.h"
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#include "unicode/tblcoll.h"
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#include "unicode/ucol.h"
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#include "unicode/uiter.h"
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#include "unicode/uloc.h"
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#include "unicode/uniset.h"
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#include "unicode/unistr.h"
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#include "unicode/usetiter.h"
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#include "unicode/utf8.h"
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#include "unicode/uversion.h"
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#include "bocsu.h"
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#include "charstr.h"
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#include "cmemory.h"
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#include "collation.h"
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#include "collationcompare.h"
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#include "collationdata.h"
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#include "collationdatareader.h"
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#include "collationfastlatin.h"
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#include "collationiterator.h"
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#include "collationkeys.h"
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#include "collationroot.h"
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#include "collationsets.h"
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#include "collationsettings.h"
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#include "collationtailoring.h"
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#include "cstring.h"
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#include "uassert.h"
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#include "ucol_imp.h"
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#include "uhash.h"
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#include "uitercollationiterator.h"
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#include "ustr_imp.h"
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#include "utf16collationiterator.h"
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#include "utf8collationiterator.h"
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#include "uvectr64.h"
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U_NAMESPACE_BEGIN
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namespace {
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class FixedSortKeyByteSink : public SortKeyByteSink {
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public:
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FixedSortKeyByteSink(char *dest, int32_t destCapacity)
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: SortKeyByteSink(dest, destCapacity) {}
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virtual ~FixedSortKeyByteSink();
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private:
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virtual void AppendBeyondCapacity(const char *bytes, int32_t n, int32_t length);
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virtual UBool Resize(int32_t appendCapacity, int32_t length);
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};
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FixedSortKeyByteSink::~FixedSortKeyByteSink() {}
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void
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FixedSortKeyByteSink::AppendBeyondCapacity(const char *bytes, int32_t /*n*/, int32_t length) {
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// buffer_ != NULL && bytes != NULL && n > 0 && appended_ > capacity_
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// Fill the buffer completely.
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int32_t available = capacity_ - length;
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if (available > 0) {
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uprv_memcpy(buffer_ + length, bytes, available);
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}
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}
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UBool
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FixedSortKeyByteSink::Resize(int32_t /*appendCapacity*/, int32_t /*length*/) {
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return FALSE;
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}
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} // namespace
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// Not in an anonymous namespace, so that it can be a friend of CollationKey.
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class CollationKeyByteSink : public SortKeyByteSink {
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public:
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CollationKeyByteSink(CollationKey &key)
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: SortKeyByteSink(reinterpret_cast<char *>(key.getBytes()), key.getCapacity()),
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key_(key) {}
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virtual ~CollationKeyByteSink();
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private:
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virtual void AppendBeyondCapacity(const char *bytes, int32_t n, int32_t length);
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virtual UBool Resize(int32_t appendCapacity, int32_t length);
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CollationKey &key_;
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};
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CollationKeyByteSink::~CollationKeyByteSink() {}
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void
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CollationKeyByteSink::AppendBeyondCapacity(const char *bytes, int32_t n, int32_t length) {
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// buffer_ != NULL && bytes != NULL && n > 0 && appended_ > capacity_
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if (Resize(n, length)) {
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uprv_memcpy(buffer_ + length, bytes, n);
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}
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}
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UBool
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CollationKeyByteSink::Resize(int32_t appendCapacity, int32_t length) {
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if (buffer_ == NULL) {
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return FALSE; // allocation failed before already
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}
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int32_t newCapacity = 2 * capacity_;
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int32_t altCapacity = length + 2 * appendCapacity;
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if (newCapacity < altCapacity) {
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newCapacity = altCapacity;
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}
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if (newCapacity < 200) {
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newCapacity = 200;
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}
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uint8_t *newBuffer = key_.reallocate(newCapacity, length);
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if (newBuffer == NULL) {
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SetNotOk();
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return FALSE;
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}
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buffer_ = reinterpret_cast<char *>(newBuffer);
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capacity_ = newCapacity;
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return TRUE;
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}
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RuleBasedCollator::RuleBasedCollator(const RuleBasedCollator &other)
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: Collator(other),
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data(other.data),
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settings(other.settings),
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tailoring(other.tailoring),
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cacheEntry(other.cacheEntry),
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validLocale(other.validLocale),
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explicitlySetAttributes(other.explicitlySetAttributes),
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actualLocaleIsSameAsValid(other.actualLocaleIsSameAsValid) {
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settings->addRef();
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cacheEntry->addRef();
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}
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RuleBasedCollator::RuleBasedCollator(const uint8_t *bin, int32_t length,
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const RuleBasedCollator *base, UErrorCode &errorCode)
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: data(NULL),
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settings(NULL),
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tailoring(NULL),
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cacheEntry(NULL),
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validLocale(""),
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explicitlySetAttributes(0),
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actualLocaleIsSameAsValid(FALSE) {
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if(U_FAILURE(errorCode)) { return; }
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if(bin == NULL || length == 0 || base == NULL) {
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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const CollationTailoring *root = CollationRoot::getRoot(errorCode);
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if(U_FAILURE(errorCode)) { return; }
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if(base->tailoring != root) {
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errorCode = U_UNSUPPORTED_ERROR;
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return;
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}
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LocalPointer<CollationTailoring> t(new CollationTailoring(base->tailoring->settings));
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if(t.isNull() || t->isBogus()) {
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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CollationDataReader::read(base->tailoring, bin, length, *t, errorCode);
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if(U_FAILURE(errorCode)) { return; }
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t->actualLocale.setToBogus();
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adoptTailoring(t.orphan(), errorCode);
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}
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RuleBasedCollator::RuleBasedCollator(const CollationCacheEntry *entry)
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: data(entry->tailoring->data),
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settings(entry->tailoring->settings),
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tailoring(entry->tailoring),
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cacheEntry(entry),
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validLocale(entry->validLocale),
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explicitlySetAttributes(0),
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actualLocaleIsSameAsValid(FALSE) {
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settings->addRef();
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cacheEntry->addRef();
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}
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RuleBasedCollator::~RuleBasedCollator() {
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SharedObject::clearPtr(settings);
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SharedObject::clearPtr(cacheEntry);
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}
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void
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RuleBasedCollator::adoptTailoring(CollationTailoring *t, UErrorCode &errorCode) {
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if(U_FAILURE(errorCode)) {
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t->deleteIfZeroRefCount();
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return;
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}
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U_ASSERT(settings == NULL && data == NULL && tailoring == NULL && cacheEntry == NULL);
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cacheEntry = new CollationCacheEntry(t->actualLocale, t);
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if(cacheEntry == NULL) {
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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t->deleteIfZeroRefCount();
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return;
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}
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data = t->data;
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settings = t->settings;
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settings->addRef();
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tailoring = t;
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cacheEntry->addRef();
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validLocale = t->actualLocale;
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actualLocaleIsSameAsValid = FALSE;
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}
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Collator *
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RuleBasedCollator::clone() const {
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return new RuleBasedCollator(*this);
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}
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RuleBasedCollator &RuleBasedCollator::operator=(const RuleBasedCollator &other) {
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if(this == &other) { return *this; }
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SharedObject::copyPtr(other.settings, settings);
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tailoring = other.tailoring;
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SharedObject::copyPtr(other.cacheEntry, cacheEntry);
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data = tailoring->data;
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validLocale = other.validLocale;
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explicitlySetAttributes = other.explicitlySetAttributes;
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actualLocaleIsSameAsValid = other.actualLocaleIsSameAsValid;
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return *this;
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}
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RuleBasedCollator)
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UBool
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RuleBasedCollator::operator==(const Collator& other) const {
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if(this == &other) { return TRUE; }
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if(!Collator::operator==(other)) { return FALSE; }
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const RuleBasedCollator &o = static_cast<const RuleBasedCollator &>(other);
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if(*settings != *o.settings) { return FALSE; }
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if(data == o.data) { return TRUE; }
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UBool thisIsRoot = data->base == NULL;
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UBool otherIsRoot = o.data->base == NULL;
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U_ASSERT(!thisIsRoot || !otherIsRoot); // otherwise their data pointers should be ==
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if(thisIsRoot != otherIsRoot) { return FALSE; }
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if((thisIsRoot || !tailoring->rules.isEmpty()) &&
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(otherIsRoot || !o.tailoring->rules.isEmpty())) {
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// Shortcut: If both collators have valid rule strings, then compare those.
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if(tailoring->rules == o.tailoring->rules) { return TRUE; }
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}
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// Different rule strings can result in the same or equivalent tailoring.
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// The rule strings are optional in ICU resource bundles, although included by default.
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// cloneBinary() drops the rule string.
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UErrorCode errorCode = U_ZERO_ERROR;
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LocalPointer<UnicodeSet> thisTailored(getTailoredSet(errorCode));
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LocalPointer<UnicodeSet> otherTailored(o.getTailoredSet(errorCode));
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if(U_FAILURE(errorCode)) { return FALSE; }
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if(*thisTailored != *otherTailored) { return FALSE; }
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// For completeness, we should compare all of the mappings;
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// or we should create a list of strings, sort it with one collator,
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// and check if both collators compare adjacent strings the same
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// (order & strength, down to quaternary); or similar.
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// Testing equality of collators seems unusual.
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return TRUE;
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}
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int32_t
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RuleBasedCollator::hashCode() const {
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int32_t h = settings->hashCode();
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if(data->base == NULL) { return h; } // root collator
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// Do not rely on the rule string, see comments in operator==().
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UErrorCode errorCode = U_ZERO_ERROR;
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LocalPointer<UnicodeSet> set(getTailoredSet(errorCode));
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if(U_FAILURE(errorCode)) { return 0; }
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UnicodeSetIterator iter(*set);
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while(iter.next() && !iter.isString()) {
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h ^= data->getCE32(iter.getCodepoint());
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}
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return h;
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}
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void
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RuleBasedCollator::setLocales(const Locale &requested, const Locale &valid,
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const Locale &actual) {
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if(actual == tailoring->actualLocale) {
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actualLocaleIsSameAsValid = FALSE;
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} else {
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U_ASSERT(actual == valid);
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actualLocaleIsSameAsValid = TRUE;
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}
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// Do not modify tailoring.actualLocale:
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// We cannot be sure that that would be thread-safe.
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validLocale = valid;
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(void)requested; // Ignore, see also ticket #10477.
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}
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Locale
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RuleBasedCollator::getLocale(ULocDataLocaleType type, UErrorCode& errorCode) const {
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if(U_FAILURE(errorCode)) {
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return Locale::getRoot();
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}
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switch(type) {
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case ULOC_ACTUAL_LOCALE:
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return actualLocaleIsSameAsValid ? validLocale : tailoring->actualLocale;
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case ULOC_VALID_LOCALE:
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return validLocale;
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case ULOC_REQUESTED_LOCALE:
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default:
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return Locale::getRoot();
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}
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}
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const char *
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RuleBasedCollator::internalGetLocaleID(ULocDataLocaleType type, UErrorCode &errorCode) const {
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if(U_FAILURE(errorCode)) {
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return NULL;
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}
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const Locale *result;
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switch(type) {
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case ULOC_ACTUAL_LOCALE:
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result = actualLocaleIsSameAsValid ? &validLocale : &tailoring->actualLocale;
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break;
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case ULOC_VALID_LOCALE:
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result = &validLocale;
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break;
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case ULOC_REQUESTED_LOCALE:
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default:
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return NULL;
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}
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if(result->isBogus()) { return NULL; }
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const char *id = result->getName();
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return id[0] == 0 ? "root" : id;
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}
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const UnicodeString&
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RuleBasedCollator::getRules() const {
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return tailoring->rules;
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}
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void
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RuleBasedCollator::getRules(UColRuleOption delta, UnicodeString &buffer) const {
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if(delta == UCOL_TAILORING_ONLY) {
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buffer = tailoring->rules;
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return;
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}
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// UCOL_FULL_RULES
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buffer.remove();
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CollationLoader::appendRootRules(buffer);
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buffer.append(tailoring->rules).getTerminatedBuffer();
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}
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void
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RuleBasedCollator::getVersion(UVersionInfo version) const {
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uprv_memcpy(version, tailoring->version, U_MAX_VERSION_LENGTH);
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version[0] += (UCOL_RUNTIME_VERSION << 4) + (UCOL_RUNTIME_VERSION >> 4);
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}
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UnicodeSet *
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RuleBasedCollator::getTailoredSet(UErrorCode &errorCode) const {
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if(U_FAILURE(errorCode)) { return NULL; }
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UnicodeSet *tailored = new UnicodeSet();
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if(tailored == NULL) {
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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if(data->base != NULL) {
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TailoredSet(tailored).forData(data, errorCode);
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if(U_FAILURE(errorCode)) {
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delete tailored;
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return NULL;
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}
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}
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return tailored;
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}
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void
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RuleBasedCollator::internalGetContractionsAndExpansions(
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UnicodeSet *contractions, UnicodeSet *expansions,
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UBool addPrefixes, UErrorCode &errorCode) const {
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if(U_FAILURE(errorCode)) { return; }
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if(contractions != NULL) {
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contractions->clear();
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}
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if(expansions != NULL) {
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expansions->clear();
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}
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ContractionsAndExpansions(contractions, expansions, NULL, addPrefixes).forData(data, errorCode);
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}
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void
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RuleBasedCollator::internalAddContractions(UChar32 c, UnicodeSet &set, UErrorCode &errorCode) const {
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if(U_FAILURE(errorCode)) { return; }
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ContractionsAndExpansions(&set, NULL, NULL, FALSE).forCodePoint(data, c, errorCode);
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}
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const CollationSettings &
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RuleBasedCollator::getDefaultSettings() const {
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return *tailoring->settings;
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}
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UColAttributeValue
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RuleBasedCollator::getAttribute(UColAttribute attr, UErrorCode &errorCode) const {
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if(U_FAILURE(errorCode)) { return UCOL_DEFAULT; }
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int32_t option;
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switch(attr) {
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case UCOL_FRENCH_COLLATION:
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option = CollationSettings::BACKWARD_SECONDARY;
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break;
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case UCOL_ALTERNATE_HANDLING:
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return settings->getAlternateHandling();
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case UCOL_CASE_FIRST:
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return settings->getCaseFirst();
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case UCOL_CASE_LEVEL:
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option = CollationSettings::CASE_LEVEL;
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break;
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case UCOL_NORMALIZATION_MODE:
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option = CollationSettings::CHECK_FCD;
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break;
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case UCOL_STRENGTH:
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return (UColAttributeValue)settings->getStrength();
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case UCOL_HIRAGANA_QUATERNARY_MODE:
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// Deprecated attribute, unsettable.
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return UCOL_OFF;
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case UCOL_NUMERIC_COLLATION:
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option = CollationSettings::NUMERIC;
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break;
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default:
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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return UCOL_DEFAULT;
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}
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return ((settings->options & option) == 0) ? UCOL_OFF : UCOL_ON;
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}
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void
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RuleBasedCollator::setAttribute(UColAttribute attr, UColAttributeValue value,
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UErrorCode &errorCode) {
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UColAttributeValue oldValue = getAttribute(attr, errorCode);
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if(U_FAILURE(errorCode)) { return; }
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if(value == oldValue) {
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setAttributeExplicitly(attr);
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return;
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}
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const CollationSettings &defaultSettings = getDefaultSettings();
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if(settings == &defaultSettings) {
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if(value == UCOL_DEFAULT) {
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setAttributeDefault(attr);
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return;
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}
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}
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CollationSettings *ownedSettings = SharedObject::copyOnWrite(settings);
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if(ownedSettings == NULL) {
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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switch(attr) {
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case UCOL_FRENCH_COLLATION:
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ownedSettings->setFlag(CollationSettings::BACKWARD_SECONDARY, value,
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defaultSettings.options, errorCode);
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break;
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case UCOL_ALTERNATE_HANDLING:
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ownedSettings->setAlternateHandling(value, defaultSettings.options, errorCode);
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break;
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case UCOL_CASE_FIRST:
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ownedSettings->setCaseFirst(value, defaultSettings.options, errorCode);
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break;
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case UCOL_CASE_LEVEL:
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ownedSettings->setFlag(CollationSettings::CASE_LEVEL, value,
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defaultSettings.options, errorCode);
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break;
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case UCOL_NORMALIZATION_MODE:
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ownedSettings->setFlag(CollationSettings::CHECK_FCD, value,
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defaultSettings.options, errorCode);
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break;
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case UCOL_STRENGTH:
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ownedSettings->setStrength(value, defaultSettings.options, errorCode);
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break;
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case UCOL_HIRAGANA_QUATERNARY_MODE:
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// Deprecated attribute. Check for valid values but do not change anything.
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if(value != UCOL_OFF && value != UCOL_ON && value != UCOL_DEFAULT) {
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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}
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break;
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case UCOL_NUMERIC_COLLATION:
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ownedSettings->setFlag(CollationSettings::NUMERIC, value, defaultSettings.options, errorCode);
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break;
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default:
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errorCode = U_ILLEGAL_ARGUMENT_ERROR;
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break;
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}
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
setFastLatinOptions(*ownedSettings);
|
|
if(value == UCOL_DEFAULT) {
|
|
setAttributeDefault(attr);
|
|
} else {
|
|
setAttributeExplicitly(attr);
|
|
}
|
|
}
|
|
|
|
Collator &
|
|
RuleBasedCollator::setMaxVariable(UColReorderCode group, UErrorCode &errorCode) {
|
|
if(U_FAILURE(errorCode)) { return *this; }
|
|
// Convert the reorder code into a MaxVariable number, or UCOL_DEFAULT=-1.
|
|
int32_t value;
|
|
if(group == UCOL_REORDER_CODE_DEFAULT) {
|
|
value = UCOL_DEFAULT;
|
|
} else if(UCOL_REORDER_CODE_FIRST <= group && group <= UCOL_REORDER_CODE_CURRENCY) {
|
|
value = group - UCOL_REORDER_CODE_FIRST;
|
|
} else {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return *this;
|
|
}
|
|
CollationSettings::MaxVariable oldValue = settings->getMaxVariable();
|
|
if(value == oldValue) {
|
|
setAttributeExplicitly(ATTR_VARIABLE_TOP);
|
|
return *this;
|
|
}
|
|
const CollationSettings &defaultSettings = getDefaultSettings();
|
|
if(settings == &defaultSettings) {
|
|
if(value == UCOL_DEFAULT) {
|
|
setAttributeDefault(ATTR_VARIABLE_TOP);
|
|
return *this;
|
|
}
|
|
}
|
|
CollationSettings *ownedSettings = SharedObject::copyOnWrite(settings);
|
|
if(ownedSettings == NULL) {
|
|
errorCode = U_MEMORY_ALLOCATION_ERROR;
|
|
return *this;
|
|
}
|
|
|
|
if(group == UCOL_REORDER_CODE_DEFAULT) {
|
|
group = (UColReorderCode)(UCOL_REORDER_CODE_FIRST + defaultSettings.getMaxVariable());
|
|
}
|
|
uint32_t varTop = data->getLastPrimaryForGroup(group);
|
|
U_ASSERT(varTop != 0);
|
|
ownedSettings->setMaxVariable(value, defaultSettings.options, errorCode);
|
|
if(U_FAILURE(errorCode)) { return *this; }
|
|
ownedSettings->variableTop = varTop;
|
|
setFastLatinOptions(*ownedSettings);
|
|
if(value == UCOL_DEFAULT) {
|
|
setAttributeDefault(ATTR_VARIABLE_TOP);
|
|
} else {
|
|
setAttributeExplicitly(ATTR_VARIABLE_TOP);
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
UColReorderCode
|
|
RuleBasedCollator::getMaxVariable() const {
|
|
return (UColReorderCode)(UCOL_REORDER_CODE_FIRST + settings->getMaxVariable());
|
|
}
|
|
|
|
uint32_t
|
|
RuleBasedCollator::getVariableTop(UErrorCode & /*errorCode*/) const {
|
|
return settings->variableTop;
|
|
}
|
|
|
|
uint32_t
|
|
RuleBasedCollator::setVariableTop(const UChar *varTop, int32_t len, UErrorCode &errorCode) {
|
|
if(U_FAILURE(errorCode)) { return 0; }
|
|
if(varTop == NULL && len !=0) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return 0;
|
|
}
|
|
if(len < 0) { len = u_strlen(varTop); }
|
|
if(len == 0) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return 0;
|
|
}
|
|
UBool numeric = settings->isNumeric();
|
|
int64_t ce1, ce2;
|
|
if(settings->dontCheckFCD()) {
|
|
UTF16CollationIterator ci(data, numeric, varTop, varTop, varTop + len);
|
|
ce1 = ci.nextCE(errorCode);
|
|
ce2 = ci.nextCE(errorCode);
|
|
} else {
|
|
FCDUTF16CollationIterator ci(data, numeric, varTop, varTop, varTop + len);
|
|
ce1 = ci.nextCE(errorCode);
|
|
ce2 = ci.nextCE(errorCode);
|
|
}
|
|
if(ce1 == Collation::NO_CE || ce2 != Collation::NO_CE) {
|
|
errorCode = U_CE_NOT_FOUND_ERROR;
|
|
return 0;
|
|
}
|
|
setVariableTop((uint32_t)(ce1 >> 32), errorCode);
|
|
return settings->variableTop;
|
|
}
|
|
|
|
uint32_t
|
|
RuleBasedCollator::setVariableTop(const UnicodeString &varTop, UErrorCode &errorCode) {
|
|
return setVariableTop(varTop.getBuffer(), varTop.length(), errorCode);
|
|
}
|
|
|
|
void
|
|
RuleBasedCollator::setVariableTop(uint32_t varTop, UErrorCode &errorCode) {
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
if(varTop != settings->variableTop) {
|
|
// Pin the variable top to the end of the reordering group which contains it.
|
|
// Only a few special groups are supported.
|
|
int32_t group = data->getGroupForPrimary(varTop);
|
|
if(group < UCOL_REORDER_CODE_FIRST || UCOL_REORDER_CODE_CURRENCY < group) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
uint32_t v = data->getLastPrimaryForGroup(group);
|
|
U_ASSERT(v != 0 && v >= varTop);
|
|
varTop = v;
|
|
if(varTop != settings->variableTop) {
|
|
CollationSettings *ownedSettings = SharedObject::copyOnWrite(settings);
|
|
if(ownedSettings == NULL) {
|
|
errorCode = U_MEMORY_ALLOCATION_ERROR;
|
|
return;
|
|
}
|
|
ownedSettings->setMaxVariable(group - UCOL_REORDER_CODE_FIRST,
|
|
getDefaultSettings().options, errorCode);
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
ownedSettings->variableTop = varTop;
|
|
setFastLatinOptions(*ownedSettings);
|
|
}
|
|
}
|
|
if(varTop == getDefaultSettings().variableTop) {
|
|
setAttributeDefault(ATTR_VARIABLE_TOP);
|
|
} else {
|
|
setAttributeExplicitly(ATTR_VARIABLE_TOP);
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
RuleBasedCollator::getReorderCodes(int32_t *dest, int32_t capacity,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return 0; }
|
|
if(capacity < 0 || (dest == NULL && capacity > 0)) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return 0;
|
|
}
|
|
int32_t length = settings->reorderCodesLength;
|
|
if(length == 0) { return 0; }
|
|
if(length > capacity) {
|
|
errorCode = U_BUFFER_OVERFLOW_ERROR;
|
|
return length;
|
|
}
|
|
uprv_memcpy(dest, settings->reorderCodes, length * 4);
|
|
return length;
|
|
}
|
|
|
|
void
|
|
RuleBasedCollator::setReorderCodes(const int32_t *reorderCodes, int32_t length,
|
|
UErrorCode &errorCode) {
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
if(length < 0 || (reorderCodes == NULL && length > 0)) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
if(length == 1 && reorderCodes[0] == UCOL_REORDER_CODE_NONE) {
|
|
length = 0;
|
|
}
|
|
if(length == settings->reorderCodesLength &&
|
|
uprv_memcmp(reorderCodes, settings->reorderCodes, length * 4) == 0) {
|
|
return;
|
|
}
|
|
const CollationSettings &defaultSettings = getDefaultSettings();
|
|
if(length == 1 && reorderCodes[0] == UCOL_REORDER_CODE_DEFAULT) {
|
|
if(settings != &defaultSettings) {
|
|
CollationSettings *ownedSettings = SharedObject::copyOnWrite(settings);
|
|
if(ownedSettings == NULL) {
|
|
errorCode = U_MEMORY_ALLOCATION_ERROR;
|
|
return;
|
|
}
|
|
ownedSettings->copyReorderingFrom(defaultSettings, errorCode);
|
|
setFastLatinOptions(*ownedSettings);
|
|
}
|
|
return;
|
|
}
|
|
CollationSettings *ownedSettings = SharedObject::copyOnWrite(settings);
|
|
if(ownedSettings == NULL) {
|
|
errorCode = U_MEMORY_ALLOCATION_ERROR;
|
|
return;
|
|
}
|
|
ownedSettings->setReordering(*data, reorderCodes, length, errorCode);
|
|
setFastLatinOptions(*ownedSettings);
|
|
}
|
|
|
|
void
|
|
RuleBasedCollator::setFastLatinOptions(CollationSettings &ownedSettings) const {
|
|
ownedSettings.fastLatinOptions = CollationFastLatin::getOptions(
|
|
data, ownedSettings,
|
|
ownedSettings.fastLatinPrimaries, UPRV_LENGTHOF(ownedSettings.fastLatinPrimaries));
|
|
}
|
|
|
|
UCollationResult
|
|
RuleBasedCollator::compare(const UnicodeString &left, const UnicodeString &right,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return UCOL_EQUAL; }
|
|
return doCompare(left.getBuffer(), left.length(),
|
|
right.getBuffer(), right.length(), errorCode);
|
|
}
|
|
|
|
UCollationResult
|
|
RuleBasedCollator::compare(const UnicodeString &left, const UnicodeString &right,
|
|
int32_t length, UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode) || length == 0) { return UCOL_EQUAL; }
|
|
if(length < 0) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return UCOL_EQUAL;
|
|
}
|
|
int32_t leftLength = left.length();
|
|
int32_t rightLength = right.length();
|
|
if(leftLength > length) { leftLength = length; }
|
|
if(rightLength > length) { rightLength = length; }
|
|
return doCompare(left.getBuffer(), leftLength,
|
|
right.getBuffer(), rightLength, errorCode);
|
|
}
|
|
|
|
UCollationResult
|
|
RuleBasedCollator::compare(const UChar *left, int32_t leftLength,
|
|
const UChar *right, int32_t rightLength,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return UCOL_EQUAL; }
|
|
if((left == NULL && leftLength != 0) || (right == NULL && rightLength != 0)) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return UCOL_EQUAL;
|
|
}
|
|
// Make sure both or neither strings have a known length.
|
|
// We do not optimize for mixed length/termination.
|
|
if(leftLength >= 0) {
|
|
if(rightLength < 0) { rightLength = u_strlen(right); }
|
|
} else {
|
|
if(rightLength >= 0) { leftLength = u_strlen(left); }
|
|
}
|
|
return doCompare(left, leftLength, right, rightLength, errorCode);
|
|
}
|
|
|
|
UCollationResult
|
|
RuleBasedCollator::compareUTF8(const StringPiece &left, const StringPiece &right,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return UCOL_EQUAL; }
|
|
const uint8_t *leftBytes = reinterpret_cast<const uint8_t *>(left.data());
|
|
const uint8_t *rightBytes = reinterpret_cast<const uint8_t *>(right.data());
|
|
if((leftBytes == NULL && !left.empty()) || (rightBytes == NULL && !right.empty())) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return UCOL_EQUAL;
|
|
}
|
|
return doCompare(leftBytes, left.length(), rightBytes, right.length(), errorCode);
|
|
}
|
|
|
|
UCollationResult
|
|
RuleBasedCollator::internalCompareUTF8(const char *left, int32_t leftLength,
|
|
const char *right, int32_t rightLength,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return UCOL_EQUAL; }
|
|
if((left == NULL && leftLength != 0) || (right == NULL && rightLength != 0)) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return UCOL_EQUAL;
|
|
}
|
|
// Make sure both or neither strings have a known length.
|
|
// We do not optimize for mixed length/termination.
|
|
if(leftLength >= 0) {
|
|
if(rightLength < 0) { rightLength = uprv_strlen(right); }
|
|
} else {
|
|
if(rightLength >= 0) { leftLength = uprv_strlen(left); }
|
|
}
|
|
return doCompare(reinterpret_cast<const uint8_t *>(left), leftLength,
|
|
reinterpret_cast<const uint8_t *>(right), rightLength, errorCode);
|
|
}
|
|
|
|
namespace {
|
|
|
|
/**
|
|
* Abstract iterator for identical-level string comparisons.
|
|
* Returns FCD code points and handles temporary switching to NFD.
|
|
*/
|
|
class NFDIterator : public UObject {
|
|
public:
|
|
NFDIterator() : index(-1), length(0) {}
|
|
virtual ~NFDIterator() {}
|
|
/**
|
|
* Returns the next code point from the internal normalization buffer,
|
|
* or else the next text code point.
|
|
* Returns -1 at the end of the text.
|
|
*/
|
|
UChar32 nextCodePoint() {
|
|
if(index >= 0) {
|
|
if(index == length) {
|
|
index = -1;
|
|
} else {
|
|
UChar32 c;
|
|
U16_NEXT_UNSAFE(decomp, index, c);
|
|
return c;
|
|
}
|
|
}
|
|
return nextRawCodePoint();
|
|
}
|
|
/**
|
|
* @param nfcImpl
|
|
* @param c the last code point returned by nextCodePoint() or nextDecomposedCodePoint()
|
|
* @return the first code point in c's decomposition,
|
|
* or c itself if it was decomposed already or if it does not decompose
|
|
*/
|
|
UChar32 nextDecomposedCodePoint(const Normalizer2Impl &nfcImpl, UChar32 c) {
|
|
if(index >= 0) { return c; }
|
|
decomp = nfcImpl.getDecomposition(c, buffer, length);
|
|
if(decomp == NULL) { return c; }
|
|
index = 0;
|
|
U16_NEXT_UNSAFE(decomp, index, c);
|
|
return c;
|
|
}
|
|
protected:
|
|
/**
|
|
* Returns the next text code point in FCD order.
|
|
* Returns -1 at the end of the text.
|
|
*/
|
|
virtual UChar32 nextRawCodePoint() = 0;
|
|
private:
|
|
const UChar *decomp;
|
|
UChar buffer[4];
|
|
int32_t index;
|
|
int32_t length;
|
|
};
|
|
|
|
class UTF16NFDIterator : public NFDIterator {
|
|
public:
|
|
UTF16NFDIterator(const UChar *text, const UChar *textLimit) : s(text), limit(textLimit) {}
|
|
protected:
|
|
virtual UChar32 nextRawCodePoint() {
|
|
if(s == limit) { return U_SENTINEL; }
|
|
UChar32 c = *s++;
|
|
if(limit == NULL && c == 0) {
|
|
s = NULL;
|
|
return U_SENTINEL;
|
|
}
|
|
UChar trail;
|
|
if(U16_IS_LEAD(c) && s != limit && U16_IS_TRAIL(trail = *s)) {
|
|
++s;
|
|
c = U16_GET_SUPPLEMENTARY(c, trail);
|
|
}
|
|
return c;
|
|
}
|
|
|
|
const UChar *s;
|
|
const UChar *limit;
|
|
};
|
|
|
|
class FCDUTF16NFDIterator : public UTF16NFDIterator {
|
|
public:
|
|
FCDUTF16NFDIterator(const Normalizer2Impl &nfcImpl, const UChar *text, const UChar *textLimit)
|
|
: UTF16NFDIterator(NULL, NULL) {
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
const UChar *spanLimit = nfcImpl.makeFCD(text, textLimit, NULL, errorCode);
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
if(spanLimit == textLimit || (textLimit == NULL && *spanLimit == 0)) {
|
|
s = text;
|
|
limit = spanLimit;
|
|
} else {
|
|
str.setTo(text, (int32_t)(spanLimit - text));
|
|
{
|
|
ReorderingBuffer buffer(nfcImpl, str);
|
|
if(buffer.init(str.length(), errorCode)) {
|
|
nfcImpl.makeFCD(spanLimit, textLimit, &buffer, errorCode);
|
|
}
|
|
}
|
|
if(U_SUCCESS(errorCode)) {
|
|
s = str.getBuffer();
|
|
limit = s + str.length();
|
|
}
|
|
}
|
|
}
|
|
private:
|
|
UnicodeString str;
|
|
};
|
|
|
|
class UTF8NFDIterator : public NFDIterator {
|
|
public:
|
|
UTF8NFDIterator(const uint8_t *text, int32_t textLength)
|
|
: s(text), pos(0), length(textLength) {}
|
|
protected:
|
|
virtual UChar32 nextRawCodePoint() {
|
|
if(pos == length || (s[pos] == 0 && length < 0)) { return U_SENTINEL; }
|
|
UChar32 c;
|
|
U8_NEXT_OR_FFFD(s, pos, length, c);
|
|
return c;
|
|
}
|
|
|
|
const uint8_t *s;
|
|
int32_t pos;
|
|
int32_t length;
|
|
};
|
|
|
|
class FCDUTF8NFDIterator : public NFDIterator {
|
|
public:
|
|
FCDUTF8NFDIterator(const CollationData *data, const uint8_t *text, int32_t textLength)
|
|
: u8ci(data, FALSE, text, 0, textLength) {}
|
|
protected:
|
|
virtual UChar32 nextRawCodePoint() {
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
return u8ci.nextCodePoint(errorCode);
|
|
}
|
|
private:
|
|
FCDUTF8CollationIterator u8ci;
|
|
};
|
|
|
|
class UIterNFDIterator : public NFDIterator {
|
|
public:
|
|
UIterNFDIterator(UCharIterator &it) : iter(it) {}
|
|
protected:
|
|
virtual UChar32 nextRawCodePoint() {
|
|
return uiter_next32(&iter);
|
|
}
|
|
private:
|
|
UCharIterator &iter;
|
|
};
|
|
|
|
class FCDUIterNFDIterator : public NFDIterator {
|
|
public:
|
|
FCDUIterNFDIterator(const CollationData *data, UCharIterator &it, int32_t startIndex)
|
|
: uici(data, FALSE, it, startIndex) {}
|
|
protected:
|
|
virtual UChar32 nextRawCodePoint() {
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
return uici.nextCodePoint(errorCode);
|
|
}
|
|
private:
|
|
FCDUIterCollationIterator uici;
|
|
};
|
|
|
|
UCollationResult compareNFDIter(const Normalizer2Impl &nfcImpl,
|
|
NFDIterator &left, NFDIterator &right) {
|
|
for(;;) {
|
|
// Fetch the next FCD code point from each string.
|
|
UChar32 leftCp = left.nextCodePoint();
|
|
UChar32 rightCp = right.nextCodePoint();
|
|
if(leftCp == rightCp) {
|
|
if(leftCp < 0) { break; }
|
|
continue;
|
|
}
|
|
// If they are different, then decompose each and compare again.
|
|
if(leftCp < 0) {
|
|
leftCp = -2; // end of string
|
|
} else if(leftCp == 0xfffe) {
|
|
leftCp = -1; // U+FFFE: merge separator
|
|
} else {
|
|
leftCp = left.nextDecomposedCodePoint(nfcImpl, leftCp);
|
|
}
|
|
if(rightCp < 0) {
|
|
rightCp = -2; // end of string
|
|
} else if(rightCp == 0xfffe) {
|
|
rightCp = -1; // U+FFFE: merge separator
|
|
} else {
|
|
rightCp = right.nextDecomposedCodePoint(nfcImpl, rightCp);
|
|
}
|
|
if(leftCp < rightCp) { return UCOL_LESS; }
|
|
if(leftCp > rightCp) { return UCOL_GREATER; }
|
|
}
|
|
return UCOL_EQUAL;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
UCollationResult
|
|
RuleBasedCollator::doCompare(const UChar *left, int32_t leftLength,
|
|
const UChar *right, int32_t rightLength,
|
|
UErrorCode &errorCode) const {
|
|
// U_FAILURE(errorCode) checked by caller.
|
|
if(left == right && leftLength == rightLength) {
|
|
return UCOL_EQUAL;
|
|
}
|
|
|
|
// Identical-prefix test.
|
|
const UChar *leftLimit;
|
|
const UChar *rightLimit;
|
|
int32_t equalPrefixLength = 0;
|
|
if(leftLength < 0) {
|
|
leftLimit = NULL;
|
|
rightLimit = NULL;
|
|
UChar c;
|
|
while((c = left[equalPrefixLength]) == right[equalPrefixLength]) {
|
|
if(c == 0) { return UCOL_EQUAL; }
|
|
++equalPrefixLength;
|
|
}
|
|
} else {
|
|
leftLimit = left + leftLength;
|
|
rightLimit = right + rightLength;
|
|
for(;;) {
|
|
if(equalPrefixLength == leftLength) {
|
|
if(equalPrefixLength == rightLength) { return UCOL_EQUAL; }
|
|
break;
|
|
} else if(equalPrefixLength == rightLength ||
|
|
left[equalPrefixLength] != right[equalPrefixLength]) {
|
|
break;
|
|
}
|
|
++equalPrefixLength;
|
|
}
|
|
}
|
|
|
|
UBool numeric = settings->isNumeric();
|
|
if(equalPrefixLength > 0) {
|
|
if((equalPrefixLength != leftLength &&
|
|
data->isUnsafeBackward(left[equalPrefixLength], numeric)) ||
|
|
(equalPrefixLength != rightLength &&
|
|
data->isUnsafeBackward(right[equalPrefixLength], numeric))) {
|
|
// Identical prefix: Back up to the start of a contraction or reordering sequence.
|
|
while(--equalPrefixLength > 0 &&
|
|
data->isUnsafeBackward(left[equalPrefixLength], numeric)) {}
|
|
}
|
|
// Notes:
|
|
// - A longer string can compare equal to a prefix of it if only ignorables follow.
|
|
// - With a backward level, a longer string can compare less-than a prefix of it.
|
|
|
|
// Pass the actual start of each string into the CollationIterators,
|
|
// plus the equalPrefixLength position,
|
|
// so that prefix matches back into the equal prefix work.
|
|
}
|
|
|
|
int32_t result;
|
|
int32_t fastLatinOptions = settings->fastLatinOptions;
|
|
if(fastLatinOptions >= 0 &&
|
|
(equalPrefixLength == leftLength ||
|
|
left[equalPrefixLength] <= CollationFastLatin::LATIN_MAX) &&
|
|
(equalPrefixLength == rightLength ||
|
|
right[equalPrefixLength] <= CollationFastLatin::LATIN_MAX)) {
|
|
if(leftLength >= 0) {
|
|
result = CollationFastLatin::compareUTF16(data->fastLatinTable,
|
|
settings->fastLatinPrimaries,
|
|
fastLatinOptions,
|
|
left + equalPrefixLength,
|
|
leftLength - equalPrefixLength,
|
|
right + equalPrefixLength,
|
|
rightLength - equalPrefixLength);
|
|
} else {
|
|
result = CollationFastLatin::compareUTF16(data->fastLatinTable,
|
|
settings->fastLatinPrimaries,
|
|
fastLatinOptions,
|
|
left + equalPrefixLength, -1,
|
|
right + equalPrefixLength, -1);
|
|
}
|
|
} else {
|
|
result = CollationFastLatin::BAIL_OUT_RESULT;
|
|
}
|
|
|
|
if(result == CollationFastLatin::BAIL_OUT_RESULT) {
|
|
if(settings->dontCheckFCD()) {
|
|
UTF16CollationIterator leftIter(data, numeric,
|
|
left, left + equalPrefixLength, leftLimit);
|
|
UTF16CollationIterator rightIter(data, numeric,
|
|
right, right + equalPrefixLength, rightLimit);
|
|
result = CollationCompare::compareUpToQuaternary(leftIter, rightIter, *settings, errorCode);
|
|
} else {
|
|
FCDUTF16CollationIterator leftIter(data, numeric,
|
|
left, left + equalPrefixLength, leftLimit);
|
|
FCDUTF16CollationIterator rightIter(data, numeric,
|
|
right, right + equalPrefixLength, rightLimit);
|
|
result = CollationCompare::compareUpToQuaternary(leftIter, rightIter, *settings, errorCode);
|
|
}
|
|
}
|
|
if(result != UCOL_EQUAL || settings->getStrength() < UCOL_IDENTICAL || U_FAILURE(errorCode)) {
|
|
return (UCollationResult)result;
|
|
}
|
|
|
|
// Note: If NUL-terminated, we could get the actual limits from the iterators now.
|
|
// That would complicate the iterators a bit, NUL-terminated strings are only a C convenience,
|
|
// and the benefit seems unlikely to be measurable.
|
|
|
|
// Compare identical level.
|
|
const Normalizer2Impl &nfcImpl = data->nfcImpl;
|
|
left += equalPrefixLength;
|
|
right += equalPrefixLength;
|
|
if(settings->dontCheckFCD()) {
|
|
UTF16NFDIterator leftIter(left, leftLimit);
|
|
UTF16NFDIterator rightIter(right, rightLimit);
|
|
return compareNFDIter(nfcImpl, leftIter, rightIter);
|
|
} else {
|
|
FCDUTF16NFDIterator leftIter(nfcImpl, left, leftLimit);
|
|
FCDUTF16NFDIterator rightIter(nfcImpl, right, rightLimit);
|
|
return compareNFDIter(nfcImpl, leftIter, rightIter);
|
|
}
|
|
}
|
|
|
|
UCollationResult
|
|
RuleBasedCollator::doCompare(const uint8_t *left, int32_t leftLength,
|
|
const uint8_t *right, int32_t rightLength,
|
|
UErrorCode &errorCode) const {
|
|
// U_FAILURE(errorCode) checked by caller.
|
|
if(left == right && leftLength == rightLength) {
|
|
return UCOL_EQUAL;
|
|
}
|
|
|
|
// Identical-prefix test.
|
|
int32_t equalPrefixLength = 0;
|
|
if(leftLength < 0) {
|
|
uint8_t c;
|
|
while((c = left[equalPrefixLength]) == right[equalPrefixLength]) {
|
|
if(c == 0) { return UCOL_EQUAL; }
|
|
++equalPrefixLength;
|
|
}
|
|
} else {
|
|
for(;;) {
|
|
if(equalPrefixLength == leftLength) {
|
|
if(equalPrefixLength == rightLength) { return UCOL_EQUAL; }
|
|
break;
|
|
} else if(equalPrefixLength == rightLength ||
|
|
left[equalPrefixLength] != right[equalPrefixLength]) {
|
|
break;
|
|
}
|
|
++equalPrefixLength;
|
|
}
|
|
}
|
|
// Back up to the start of a partially-equal code point.
|
|
if(equalPrefixLength > 0 &&
|
|
((equalPrefixLength != leftLength && U8_IS_TRAIL(left[equalPrefixLength])) ||
|
|
(equalPrefixLength != rightLength && U8_IS_TRAIL(right[equalPrefixLength])))) {
|
|
while(--equalPrefixLength > 0 && U8_IS_TRAIL(left[equalPrefixLength])) {}
|
|
}
|
|
|
|
UBool numeric = settings->isNumeric();
|
|
if(equalPrefixLength > 0) {
|
|
UBool unsafe = FALSE;
|
|
if(equalPrefixLength != leftLength) {
|
|
int32_t i = equalPrefixLength;
|
|
UChar32 c;
|
|
U8_NEXT_OR_FFFD(left, i, leftLength, c);
|
|
unsafe = data->isUnsafeBackward(c, numeric);
|
|
}
|
|
if(!unsafe && equalPrefixLength != rightLength) {
|
|
int32_t i = equalPrefixLength;
|
|
UChar32 c;
|
|
U8_NEXT_OR_FFFD(right, i, rightLength, c);
|
|
unsafe = data->isUnsafeBackward(c, numeric);
|
|
}
|
|
if(unsafe) {
|
|
// Identical prefix: Back up to the start of a contraction or reordering sequence.
|
|
UChar32 c;
|
|
do {
|
|
U8_PREV_OR_FFFD(left, 0, equalPrefixLength, c);
|
|
} while(equalPrefixLength > 0 && data->isUnsafeBackward(c, numeric));
|
|
}
|
|
// See the notes in the UTF-16 version.
|
|
|
|
// Pass the actual start of each string into the CollationIterators,
|
|
// plus the equalPrefixLength position,
|
|
// so that prefix matches back into the equal prefix work.
|
|
}
|
|
|
|
int32_t result;
|
|
int32_t fastLatinOptions = settings->fastLatinOptions;
|
|
if(fastLatinOptions >= 0 &&
|
|
(equalPrefixLength == leftLength ||
|
|
left[equalPrefixLength] <= CollationFastLatin::LATIN_MAX_UTF8_LEAD) &&
|
|
(equalPrefixLength == rightLength ||
|
|
right[equalPrefixLength] <= CollationFastLatin::LATIN_MAX_UTF8_LEAD)) {
|
|
if(leftLength >= 0) {
|
|
result = CollationFastLatin::compareUTF8(data->fastLatinTable,
|
|
settings->fastLatinPrimaries,
|
|
fastLatinOptions,
|
|
left + equalPrefixLength,
|
|
leftLength - equalPrefixLength,
|
|
right + equalPrefixLength,
|
|
rightLength - equalPrefixLength);
|
|
} else {
|
|
result = CollationFastLatin::compareUTF8(data->fastLatinTable,
|
|
settings->fastLatinPrimaries,
|
|
fastLatinOptions,
|
|
left + equalPrefixLength, -1,
|
|
right + equalPrefixLength, -1);
|
|
}
|
|
} else {
|
|
result = CollationFastLatin::BAIL_OUT_RESULT;
|
|
}
|
|
|
|
if(result == CollationFastLatin::BAIL_OUT_RESULT) {
|
|
if(settings->dontCheckFCD()) {
|
|
UTF8CollationIterator leftIter(data, numeric, left, equalPrefixLength, leftLength);
|
|
UTF8CollationIterator rightIter(data, numeric, right, equalPrefixLength, rightLength);
|
|
result = CollationCompare::compareUpToQuaternary(leftIter, rightIter, *settings, errorCode);
|
|
} else {
|
|
FCDUTF8CollationIterator leftIter(data, numeric, left, equalPrefixLength, leftLength);
|
|
FCDUTF8CollationIterator rightIter(data, numeric, right, equalPrefixLength, rightLength);
|
|
result = CollationCompare::compareUpToQuaternary(leftIter, rightIter, *settings, errorCode);
|
|
}
|
|
}
|
|
if(result != UCOL_EQUAL || settings->getStrength() < UCOL_IDENTICAL || U_FAILURE(errorCode)) {
|
|
return (UCollationResult)result;
|
|
}
|
|
|
|
// Note: If NUL-terminated, we could get the actual limits from the iterators now.
|
|
// That would complicate the iterators a bit, NUL-terminated strings are only a C convenience,
|
|
// and the benefit seems unlikely to be measurable.
|
|
|
|
// Compare identical level.
|
|
const Normalizer2Impl &nfcImpl = data->nfcImpl;
|
|
left += equalPrefixLength;
|
|
right += equalPrefixLength;
|
|
if(leftLength > 0) {
|
|
leftLength -= equalPrefixLength;
|
|
rightLength -= equalPrefixLength;
|
|
}
|
|
if(settings->dontCheckFCD()) {
|
|
UTF8NFDIterator leftIter(left, leftLength);
|
|
UTF8NFDIterator rightIter(right, rightLength);
|
|
return compareNFDIter(nfcImpl, leftIter, rightIter);
|
|
} else {
|
|
FCDUTF8NFDIterator leftIter(data, left, leftLength);
|
|
FCDUTF8NFDIterator rightIter(data, right, rightLength);
|
|
return compareNFDIter(nfcImpl, leftIter, rightIter);
|
|
}
|
|
}
|
|
|
|
UCollationResult
|
|
RuleBasedCollator::compare(UCharIterator &left, UCharIterator &right,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode) || &left == &right) { return UCOL_EQUAL; }
|
|
UBool numeric = settings->isNumeric();
|
|
|
|
// Identical-prefix test.
|
|
int32_t equalPrefixLength = 0;
|
|
{
|
|
UChar32 leftUnit;
|
|
UChar32 rightUnit;
|
|
while((leftUnit = left.next(&left)) == (rightUnit = right.next(&right))) {
|
|
if(leftUnit < 0) { return UCOL_EQUAL; }
|
|
++equalPrefixLength;
|
|
}
|
|
|
|
// Back out the code units that differed, for the real collation comparison.
|
|
if(leftUnit >= 0) { left.previous(&left); }
|
|
if(rightUnit >= 0) { right.previous(&right); }
|
|
|
|
if(equalPrefixLength > 0) {
|
|
if((leftUnit >= 0 && data->isUnsafeBackward(leftUnit, numeric)) ||
|
|
(rightUnit >= 0 && data->isUnsafeBackward(rightUnit, numeric))) {
|
|
// Identical prefix: Back up to the start of a contraction or reordering sequence.
|
|
do {
|
|
--equalPrefixLength;
|
|
leftUnit = left.previous(&left);
|
|
right.previous(&right);
|
|
} while(equalPrefixLength > 0 && data->isUnsafeBackward(leftUnit, numeric));
|
|
}
|
|
// See the notes in the UTF-16 version.
|
|
}
|
|
}
|
|
|
|
UCollationResult result;
|
|
if(settings->dontCheckFCD()) {
|
|
UIterCollationIterator leftIter(data, numeric, left);
|
|
UIterCollationIterator rightIter(data, numeric, right);
|
|
result = CollationCompare::compareUpToQuaternary(leftIter, rightIter, *settings, errorCode);
|
|
} else {
|
|
FCDUIterCollationIterator leftIter(data, numeric, left, equalPrefixLength);
|
|
FCDUIterCollationIterator rightIter(data, numeric, right, equalPrefixLength);
|
|
result = CollationCompare::compareUpToQuaternary(leftIter, rightIter, *settings, errorCode);
|
|
}
|
|
if(result != UCOL_EQUAL || settings->getStrength() < UCOL_IDENTICAL || U_FAILURE(errorCode)) {
|
|
return result;
|
|
}
|
|
|
|
// Compare identical level.
|
|
left.move(&left, equalPrefixLength, UITER_ZERO);
|
|
right.move(&right, equalPrefixLength, UITER_ZERO);
|
|
const Normalizer2Impl &nfcImpl = data->nfcImpl;
|
|
if(settings->dontCheckFCD()) {
|
|
UIterNFDIterator leftIter(left);
|
|
UIterNFDIterator rightIter(right);
|
|
return compareNFDIter(nfcImpl, leftIter, rightIter);
|
|
} else {
|
|
FCDUIterNFDIterator leftIter(data, left, equalPrefixLength);
|
|
FCDUIterNFDIterator rightIter(data, right, equalPrefixLength);
|
|
return compareNFDIter(nfcImpl, leftIter, rightIter);
|
|
}
|
|
}
|
|
|
|
CollationKey &
|
|
RuleBasedCollator::getCollationKey(const UnicodeString &s, CollationKey &key,
|
|
UErrorCode &errorCode) const {
|
|
return getCollationKey(s.getBuffer(), s.length(), key, errorCode);
|
|
}
|
|
|
|
CollationKey &
|
|
RuleBasedCollator::getCollationKey(const UChar *s, int32_t length, CollationKey& key,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) {
|
|
return key.setToBogus();
|
|
}
|
|
if(s == NULL && length != 0) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return key.setToBogus();
|
|
}
|
|
key.reset(); // resets the "bogus" state
|
|
CollationKeyByteSink sink(key);
|
|
writeSortKey(s, length, sink, errorCode);
|
|
if(U_FAILURE(errorCode)) {
|
|
key.setToBogus();
|
|
} else if(key.isBogus()) {
|
|
errorCode = U_MEMORY_ALLOCATION_ERROR;
|
|
} else {
|
|
key.setLength(sink.NumberOfBytesAppended());
|
|
}
|
|
return key;
|
|
}
|
|
|
|
int32_t
|
|
RuleBasedCollator::getSortKey(const UnicodeString &s,
|
|
uint8_t *dest, int32_t capacity) const {
|
|
return getSortKey(s.getBuffer(), s.length(), dest, capacity);
|
|
}
|
|
|
|
int32_t
|
|
RuleBasedCollator::getSortKey(const UChar *s, int32_t length,
|
|
uint8_t *dest, int32_t capacity) const {
|
|
if((s == NULL && length != 0) || capacity < 0 || (dest == NULL && capacity > 0)) {
|
|
return 0;
|
|
}
|
|
uint8_t noDest[1] = { 0 };
|
|
if(dest == NULL) {
|
|
// Distinguish pure preflighting from an allocation error.
|
|
dest = noDest;
|
|
capacity = 0;
|
|
}
|
|
FixedSortKeyByteSink sink(reinterpret_cast<char *>(dest), capacity);
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
writeSortKey(s, length, sink, errorCode);
|
|
return U_SUCCESS(errorCode) ? sink.NumberOfBytesAppended() : 0;
|
|
}
|
|
|
|
void
|
|
RuleBasedCollator::writeSortKey(const UChar *s, int32_t length,
|
|
SortKeyByteSink &sink, UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
const UChar *limit = (length >= 0) ? s + length : NULL;
|
|
UBool numeric = settings->isNumeric();
|
|
CollationKeys::LevelCallback callback;
|
|
if(settings->dontCheckFCD()) {
|
|
UTF16CollationIterator iter(data, numeric, s, s, limit);
|
|
CollationKeys::writeSortKeyUpToQuaternary(iter, data->compressibleBytes, *settings,
|
|
sink, Collation::PRIMARY_LEVEL,
|
|
callback, TRUE, errorCode);
|
|
} else {
|
|
FCDUTF16CollationIterator iter(data, numeric, s, s, limit);
|
|
CollationKeys::writeSortKeyUpToQuaternary(iter, data->compressibleBytes, *settings,
|
|
sink, Collation::PRIMARY_LEVEL,
|
|
callback, TRUE, errorCode);
|
|
}
|
|
if(settings->getStrength() == UCOL_IDENTICAL) {
|
|
writeIdenticalLevel(s, limit, sink, errorCode);
|
|
}
|
|
static const char terminator = 0; // TERMINATOR_BYTE
|
|
sink.Append(&terminator, 1);
|
|
}
|
|
|
|
void
|
|
RuleBasedCollator::writeIdenticalLevel(const UChar *s, const UChar *limit,
|
|
SortKeyByteSink &sink, UErrorCode &errorCode) const {
|
|
// NFD quick check
|
|
const UChar *nfdQCYesLimit = data->nfcImpl.decompose(s, limit, NULL, errorCode);
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
sink.Append(Collation::LEVEL_SEPARATOR_BYTE);
|
|
UChar32 prev = 0;
|
|
if(nfdQCYesLimit != s) {
|
|
prev = u_writeIdenticalLevelRun(prev, s, (int32_t)(nfdQCYesLimit - s), sink);
|
|
}
|
|
// Is there non-NFD text?
|
|
int32_t destLengthEstimate;
|
|
if(limit != NULL) {
|
|
if(nfdQCYesLimit == limit) { return; }
|
|
destLengthEstimate = (int32_t)(limit - nfdQCYesLimit);
|
|
} else {
|
|
// s is NUL-terminated
|
|
if(*nfdQCYesLimit == 0) { return; }
|
|
destLengthEstimate = -1;
|
|
}
|
|
UnicodeString nfd;
|
|
data->nfcImpl.decompose(nfdQCYesLimit, limit, nfd, destLengthEstimate, errorCode);
|
|
u_writeIdenticalLevelRun(prev, nfd.getBuffer(), nfd.length(), sink);
|
|
}
|
|
|
|
namespace {
|
|
|
|
/**
|
|
* internalNextSortKeyPart() calls CollationKeys::writeSortKeyUpToQuaternary()
|
|
* with an instance of this callback class.
|
|
* When another level is about to be written, the callback
|
|
* records the level and the number of bytes that will be written until
|
|
* the sink (which is actually a FixedSortKeyByteSink) fills up.
|
|
*
|
|
* When internalNextSortKeyPart() is called again, it restarts with the last level
|
|
* and ignores as many bytes as were written previously for that level.
|
|
*/
|
|
class PartLevelCallback : public CollationKeys::LevelCallback {
|
|
public:
|
|
PartLevelCallback(const SortKeyByteSink &s)
|
|
: sink(s), level(Collation::PRIMARY_LEVEL) {
|
|
levelCapacity = sink.GetRemainingCapacity();
|
|
}
|
|
virtual ~PartLevelCallback() {}
|
|
virtual UBool needToWrite(Collation::Level l) {
|
|
if(!sink.Overflowed()) {
|
|
// Remember a level that will be at least partially written.
|
|
level = l;
|
|
levelCapacity = sink.GetRemainingCapacity();
|
|
return TRUE;
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
Collation::Level getLevel() const { return level; }
|
|
int32_t getLevelCapacity() const { return levelCapacity; }
|
|
|
|
private:
|
|
const SortKeyByteSink &sink;
|
|
Collation::Level level;
|
|
int32_t levelCapacity;
|
|
};
|
|
|
|
} // namespace
|
|
|
|
int32_t
|
|
RuleBasedCollator::internalNextSortKeyPart(UCharIterator *iter, uint32_t state[2],
|
|
uint8_t *dest, int32_t count, UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return 0; }
|
|
if(iter == NULL || state == NULL || count < 0 || (count > 0 && dest == NULL)) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return 0;
|
|
}
|
|
if(count == 0) { return 0; }
|
|
|
|
FixedSortKeyByteSink sink(reinterpret_cast<char *>(dest), count);
|
|
sink.IgnoreBytes((int32_t)state[1]);
|
|
iter->move(iter, 0, UITER_START);
|
|
|
|
Collation::Level level = (Collation::Level)state[0];
|
|
if(level <= Collation::QUATERNARY_LEVEL) {
|
|
UBool numeric = settings->isNumeric();
|
|
PartLevelCallback callback(sink);
|
|
if(settings->dontCheckFCD()) {
|
|
UIterCollationIterator ci(data, numeric, *iter);
|
|
CollationKeys::writeSortKeyUpToQuaternary(ci, data->compressibleBytes, *settings,
|
|
sink, level, callback, FALSE, errorCode);
|
|
} else {
|
|
FCDUIterCollationIterator ci(data, numeric, *iter, 0);
|
|
CollationKeys::writeSortKeyUpToQuaternary(ci, data->compressibleBytes, *settings,
|
|
sink, level, callback, FALSE, errorCode);
|
|
}
|
|
if(U_FAILURE(errorCode)) { return 0; }
|
|
if(sink.NumberOfBytesAppended() > count) {
|
|
state[0] = (uint32_t)callback.getLevel();
|
|
state[1] = (uint32_t)callback.getLevelCapacity();
|
|
return count;
|
|
}
|
|
// All of the normal levels are done.
|
|
if(settings->getStrength() == UCOL_IDENTICAL) {
|
|
level = Collation::IDENTICAL_LEVEL;
|
|
iter->move(iter, 0, UITER_START);
|
|
}
|
|
// else fall through to setting ZERO_LEVEL
|
|
}
|
|
|
|
if(level == Collation::IDENTICAL_LEVEL) {
|
|
int32_t levelCapacity = sink.GetRemainingCapacity();
|
|
UnicodeString s;
|
|
for(;;) {
|
|
UChar32 c = iter->next(iter);
|
|
if(c < 0) { break; }
|
|
s.append((UChar)c);
|
|
}
|
|
const UChar *sArray = s.getBuffer();
|
|
writeIdenticalLevel(sArray, sArray + s.length(), sink, errorCode);
|
|
if(U_FAILURE(errorCode)) { return 0; }
|
|
if(sink.NumberOfBytesAppended() > count) {
|
|
state[0] = (uint32_t)level;
|
|
state[1] = (uint32_t)levelCapacity;
|
|
return count;
|
|
}
|
|
}
|
|
|
|
// ZERO_LEVEL: Fill the remainder of dest with 00 bytes.
|
|
state[0] = (uint32_t)Collation::ZERO_LEVEL;
|
|
state[1] = 0;
|
|
int32_t length = sink.NumberOfBytesAppended();
|
|
int32_t i = length;
|
|
while(i < count) { dest[i++] = 0; }
|
|
return length;
|
|
}
|
|
|
|
void
|
|
RuleBasedCollator::internalGetCEs(const UnicodeString &str, UVector64 &ces,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
const UChar *s = str.getBuffer();
|
|
const UChar *limit = s + str.length();
|
|
UBool numeric = settings->isNumeric();
|
|
if(settings->dontCheckFCD()) {
|
|
UTF16CollationIterator iter(data, numeric, s, s, limit);
|
|
int64_t ce;
|
|
while((ce = iter.nextCE(errorCode)) != Collation::NO_CE) {
|
|
ces.addElement(ce, errorCode);
|
|
}
|
|
} else {
|
|
FCDUTF16CollationIterator iter(data, numeric, s, s, limit);
|
|
int64_t ce;
|
|
while((ce = iter.nextCE(errorCode)) != Collation::NO_CE) {
|
|
ces.addElement(ce, errorCode);
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
|
|
void appendSubtag(CharString &s, char letter, const char *subtag, int32_t length,
|
|
UErrorCode &errorCode) {
|
|
if(U_FAILURE(errorCode) || length == 0) { return; }
|
|
if(!s.isEmpty()) {
|
|
s.append('_', errorCode);
|
|
}
|
|
s.append(letter, errorCode);
|
|
for(int32_t i = 0; i < length; ++i) {
|
|
s.append(uprv_toupper(subtag[i]), errorCode);
|
|
}
|
|
}
|
|
|
|
void appendAttribute(CharString &s, char letter, UColAttributeValue value,
|
|
UErrorCode &errorCode) {
|
|
if(U_FAILURE(errorCode)) { return; }
|
|
if(!s.isEmpty()) {
|
|
s.append('_', errorCode);
|
|
}
|
|
static const char *valueChars = "1234...........IXO..SN..LU......";
|
|
s.append(letter, errorCode);
|
|
s.append(valueChars[value], errorCode);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
int32_t
|
|
RuleBasedCollator::internalGetShortDefinitionString(const char *locale,
|
|
char *buffer, int32_t capacity,
|
|
UErrorCode &errorCode) const {
|
|
if(U_FAILURE(errorCode)) { return 0; }
|
|
if(buffer == NULL ? capacity != 0 : capacity < 0) {
|
|
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
|
|
return 0;
|
|
}
|
|
if(locale == NULL) {
|
|
locale = internalGetLocaleID(ULOC_VALID_LOCALE, errorCode);
|
|
}
|
|
|
|
char resultLocale[ULOC_FULLNAME_CAPACITY + 1];
|
|
int32_t length = ucol_getFunctionalEquivalent(resultLocale, ULOC_FULLNAME_CAPACITY,
|
|
"collation", locale,
|
|
NULL, &errorCode);
|
|
if(U_FAILURE(errorCode)) { return 0; }
|
|
if(length == 0) {
|
|
uprv_strcpy(resultLocale, "root");
|
|
} else {
|
|
resultLocale[length] = 0;
|
|
}
|
|
|
|
// Append items in alphabetic order of their short definition letters.
|
|
CharString result;
|
|
char subtag[ULOC_KEYWORD_AND_VALUES_CAPACITY];
|
|
|
|
if(attributeHasBeenSetExplicitly(UCOL_ALTERNATE_HANDLING)) {
|
|
appendAttribute(result, 'A', getAttribute(UCOL_ALTERNATE_HANDLING, errorCode), errorCode);
|
|
}
|
|
// ATTR_VARIABLE_TOP not supported because 'B' was broken.
|
|
// See ICU tickets #10372 and #10386.
|
|
if(attributeHasBeenSetExplicitly(UCOL_CASE_FIRST)) {
|
|
appendAttribute(result, 'C', getAttribute(UCOL_CASE_FIRST, errorCode), errorCode);
|
|
}
|
|
if(attributeHasBeenSetExplicitly(UCOL_NUMERIC_COLLATION)) {
|
|
appendAttribute(result, 'D', getAttribute(UCOL_NUMERIC_COLLATION, errorCode), errorCode);
|
|
}
|
|
if(attributeHasBeenSetExplicitly(UCOL_CASE_LEVEL)) {
|
|
appendAttribute(result, 'E', getAttribute(UCOL_CASE_LEVEL, errorCode), errorCode);
|
|
}
|
|
if(attributeHasBeenSetExplicitly(UCOL_FRENCH_COLLATION)) {
|
|
appendAttribute(result, 'F', getAttribute(UCOL_FRENCH_COLLATION, errorCode), errorCode);
|
|
}
|
|
// Note: UCOL_HIRAGANA_QUATERNARY_MODE is deprecated and never changes away from default.
|
|
length = uloc_getKeywordValue(resultLocale, "collation", subtag, UPRV_LENGTHOF(subtag), &errorCode);
|
|
appendSubtag(result, 'K', subtag, length, errorCode);
|
|
length = uloc_getLanguage(resultLocale, subtag, UPRV_LENGTHOF(subtag), &errorCode);
|
|
appendSubtag(result, 'L', subtag, length, errorCode);
|
|
if(attributeHasBeenSetExplicitly(UCOL_NORMALIZATION_MODE)) {
|
|
appendAttribute(result, 'N', getAttribute(UCOL_NORMALIZATION_MODE, errorCode), errorCode);
|
|
}
|
|
length = uloc_getCountry(resultLocale, subtag, UPRV_LENGTHOF(subtag), &errorCode);
|
|
appendSubtag(result, 'R', subtag, length, errorCode);
|
|
if(attributeHasBeenSetExplicitly(UCOL_STRENGTH)) {
|
|
appendAttribute(result, 'S', getAttribute(UCOL_STRENGTH, errorCode), errorCode);
|
|
}
|
|
length = uloc_getVariant(resultLocale, subtag, UPRV_LENGTHOF(subtag), &errorCode);
|
|
appendSubtag(result, 'V', subtag, length, errorCode);
|
|
length = uloc_getScript(resultLocale, subtag, UPRV_LENGTHOF(subtag), &errorCode);
|
|
appendSubtag(result, 'Z', subtag, length, errorCode);
|
|
|
|
if(U_FAILURE(errorCode)) { return 0; }
|
|
if(result.length() <= capacity) {
|
|
uprv_memcpy(buffer, result.data(), result.length());
|
|
}
|
|
return u_terminateChars(buffer, capacity, result.length(), &errorCode);
|
|
}
|
|
|
|
UBool
|
|
RuleBasedCollator::isUnsafe(UChar32 c) const {
|
|
return data->isUnsafeBackward(c, settings->isNumeric());
|
|
}
|
|
|
|
void U_CALLCONV
|
|
RuleBasedCollator::computeMaxExpansions(const CollationTailoring *t, UErrorCode &errorCode) {
|
|
t->maxExpansions = CollationElementIterator::computeMaxExpansions(t->data, errorCode);
|
|
}
|
|
|
|
UBool
|
|
RuleBasedCollator::initMaxExpansions(UErrorCode &errorCode) const {
|
|
umtx_initOnce(tailoring->maxExpansionsInitOnce, computeMaxExpansions, tailoring, errorCode);
|
|
return U_SUCCESS(errorCode);
|
|
}
|
|
|
|
CollationElementIterator *
|
|
RuleBasedCollator::createCollationElementIterator(const UnicodeString& source) const {
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
if(!initMaxExpansions(errorCode)) { return NULL; }
|
|
CollationElementIterator *cei = new CollationElementIterator(source, this, errorCode);
|
|
if(U_FAILURE(errorCode)) {
|
|
delete cei;
|
|
return NULL;
|
|
}
|
|
return cei;
|
|
}
|
|
|
|
CollationElementIterator *
|
|
RuleBasedCollator::createCollationElementIterator(const CharacterIterator& source) const {
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
if(!initMaxExpansions(errorCode)) { return NULL; }
|
|
CollationElementIterator *cei = new CollationElementIterator(source, this, errorCode);
|
|
if(U_FAILURE(errorCode)) {
|
|
delete cei;
|
|
return NULL;
|
|
}
|
|
return cei;
|
|
}
|
|
|
|
int32_t
|
|
RuleBasedCollator::getMaxExpansion(int32_t order) const {
|
|
UErrorCode errorCode = U_ZERO_ERROR;
|
|
(void)initMaxExpansions(errorCode);
|
|
return CollationElementIterator::getMaxExpansion(tailoring->maxExpansions, order);
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif // !UCONFIG_NO_COLLATION
|