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// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ****************************************************************************** * Copyright (C) 1996-2016, International Business Machines Corporation and * others. All Rights Reserved. ****************************************************************************** */ /** * \file * \brief C++ API: The RuleBasedCollator class implements the Collator abstract base class. */ /** * File tblcoll.h * * Created by: Helena Shih * * Modification History: * * Date Name Description * 2/5/97 aliu Added streamIn and streamOut methods. Added * constructor which reads RuleBasedCollator object from * a binary file. Added writeToFile method which streams * RuleBasedCollator out to a binary file. The streamIn * and streamOut methods use istream and ostream objects * in binary mode. * 2/12/97 aliu Modified to use TableCollationData sub-object to * hold invariant data. * 2/13/97 aliu Moved several methods into this class from Collation. * Added a private RuleBasedCollator(Locale&) constructor, * to be used by Collator::createDefault(). General * clean up. * 2/20/97 helena Added clone, operator==, operator!=, operator=, and copy * constructor and getDynamicClassID. * 3/5/97 aliu Modified constructFromFile() to add parameter * specifying whether or not binary loading is to be * attempted. This is required for dynamic rule loading. * 05/07/97 helena Added memory allocation error detection. * 6/17/97 helena Added IDENTICAL strength for compare, changed getRules to * use MergeCollation::getPattern. * 6/20/97 helena Java class name change. * 8/18/97 helena Added internal API documentation. * 09/03/97 helena Added createCollationKeyValues(). * 02/10/98 damiba Added compare with "length" parameter * 08/05/98 erm Synched with 1.2 version of RuleBasedCollator.java * 04/23/99 stephen Removed EDecompositionMode, merged with * Normalizer::EMode * 06/14/99 stephen Removed kResourceBundleSuffix * 11/02/99 helena Collator performance enhancements. Eliminates the * UnicodeString construction and special case for NO_OP. * 11/23/99 srl More performance enhancements. Updates to NormalizerIterator * internal state management. * 12/15/99 aliu Update to support Thai collation. Move NormalizerIterator * to implementation file. * 01/29/01 synwee Modified into a C++ wrapper which calls C API * (ucol.h) * 2012-2014 markus Rewritten in C++ again. */ #ifndef TBLCOLL_H #define TBLCOLL_H #include "unicode/utypes.h" #if U_SHOW_CPLUSPLUS_API #if !UCONFIG_NO_COLLATION #include "unicode/coll.h" #include "unicode/locid.h" #include "unicode/uiter.h" #include "unicode/ucol.h" U_NAMESPACE_BEGIN struct CollationCacheEntry; struct CollationData; struct CollationSettings; struct CollationTailoring; /** * @stable ICU 2.0 */ class StringSearch; /** * @stable ICU 2.0 */ class CollationElementIterator; class CollationKey; class SortKeyByteSink; class UnicodeSet; class UnicodeString; class UVector64; /** * The RuleBasedCollator class provides the implementation of * Collator, using data-driven tables. The user can create a customized * table-based collation. *

* For more information about the collation service see * the User Guide. *

* Collation service provides correct sorting orders for most locales supported in ICU. * If specific data for a locale is not available, the orders eventually falls back * to the CLDR root sort order. *

* Sort ordering may be customized by providing your own set of rules. For more on * this subject see the * Collation Customization section of the User Guide. *

* Note, RuleBasedCollator is not to be subclassed. * @see Collator */ class U_I18N_API_CLASS RuleBasedCollator final : public Collator { public: /** * RuleBasedCollator constructor. This takes the table rules and builds a * collation table out of them. Please see RuleBasedCollator class * description for more details on the collation rule syntax. * @param rules the collation rules to build the collation table from. * @param status reporting a success or an error. * @stable ICU 2.0 */ U_I18N_API RuleBasedCollator(const UnicodeString& rules, UErrorCode& status); /** * RuleBasedCollator constructor. This takes the table rules and builds a * collation table out of them. Please see RuleBasedCollator class * description for more details on the collation rule syntax. * @param rules the collation rules to build the collation table from. * @param collationStrength strength for comparison * @param status reporting a success or an error. * @stable ICU 2.0 */ U_I18N_API RuleBasedCollator(const UnicodeString& rules, ECollationStrength collationStrength, UErrorCode& status); /** * RuleBasedCollator constructor. This takes the table rules and builds a * collation table out of them. Please see RuleBasedCollator class * description for more details on the collation rule syntax. * @param rules the collation rules to build the collation table from. * @param decompositionMode the normalisation mode * @param status reporting a success or an error. * @stable ICU 2.0 */ U_I18N_API RuleBasedCollator(const UnicodeString& rules, UColAttributeValue decompositionMode, UErrorCode& status); /** * RuleBasedCollator constructor. This takes the table rules and builds a * collation table out of them. Please see RuleBasedCollator class * description for more details on the collation rule syntax. * @param rules the collation rules to build the collation table from. * @param collationStrength strength for comparison * @param decompositionMode the normalisation mode * @param status reporting a success or an error. * @stable ICU 2.0 */ U_I18N_API RuleBasedCollator(const UnicodeString& rules, ECollationStrength collationStrength, UColAttributeValue decompositionMode, UErrorCode& status); #ifndef U_HIDE_INTERNAL_API /** * TODO: document & propose as public API * @internal */ U_I18N_API RuleBasedCollator(const UnicodeString& rules, UParseError& parseError, UnicodeString& reason, UErrorCode& errorCode); #endif /* U_HIDE_INTERNAL_API */ /** * Copy constructor. * @param other the RuleBasedCollator object to be copied * @stable ICU 2.0 */ U_I18N_API RuleBasedCollator(const RuleBasedCollator& other); /** Opens a collator from a collator binary image created using * cloneBinary. Binary image used in instantiation of the * collator remains owned by the user and should stay around for * the lifetime of the collator. The API also takes a base collator * which must be the root collator. * @param bin binary image owned by the user and required through the * lifetime of the collator * @param length size of the image. If negative, the API will try to * figure out the length of the image * @param base Base collator, for lookup of untailored characters. * Must be the root collator, must not be nullptr. * The base is required to be present through the lifetime of the collator. * @param status for catching errors * @return newly created collator * @see cloneBinary * @stable ICU 3.4 */ U_I18N_API RuleBasedCollator(const uint8_t* bin, int32_t length, const RuleBasedCollator* base, UErrorCode& status); /** * Destructor. * @stable ICU 2.0 */ U_I18N_API virtual ~RuleBasedCollator(); /** * Assignment operator. * @param other other RuleBasedCollator object to copy from. * @stable ICU 2.0 */ U_I18N_API RuleBasedCollator& operator=(const RuleBasedCollator& other); /** * Returns true if argument is the same as this object. * @param other Collator object to be compared. * @return true if arguments is the same as this object. * @stable ICU 2.0 */ U_I18N_API virtual bool operator==(const Collator& other) const override; /** * Makes a copy of this object. * @return a copy of this object, owned by the caller * @stable ICU 2.0 */ U_I18N_API virtual RuleBasedCollator* clone() const override; /** * Creates a collation element iterator for the source string. The caller of * this method is responsible for the memory management of the return * pointer. * @param source the string over which the CollationElementIterator will * iterate. * @return the collation element iterator of the source string using this as * the based Collator. * @stable ICU 2.2 */ U_I18N_API CollationElementIterator* createCollationElementIterator(const UnicodeString& source) const; /** * Creates a collation element iterator for the source. The caller of this * method is responsible for the memory management of the returned pointer. * @param source the CharacterIterator which produces the characters over * which the CollationElementItgerator will iterate. * @return the collation element iterator of the source using this as the * based Collator. * @stable ICU 2.2 */ U_I18N_API CollationElementIterator* createCollationElementIterator(const CharacterIterator& source) const; // Make deprecated versions of Collator::compare() visible. using Collator::compare; /** * The comparison function compares the character data stored in two * different strings. Returns information about whether a string is less * than, greater than or equal to another string. * @param source the source string to be compared with. * @param target the string that is to be compared with the source string. * @param status possible error code * @return Returns an enum value. UCOL_GREATER if source is greater * than target; UCOL_EQUAL if source is equal to target; UCOL_LESS if source is less * than target * @stable ICU 2.6 **/ U_I18N_API virtual UCollationResult compare(const UnicodeString& source, const UnicodeString& target, UErrorCode& status) const override; /** * Does the same thing as compare but limits the comparison to a specified * length * @param source the source string to be compared with. * @param target the string that is to be compared with the source string. * @param length the length the comparison is limited to * @param status possible error code * @return Returns an enum value. UCOL_GREATER if source (up to the specified * length) is greater than target; UCOL_EQUAL if source (up to specified * length) is equal to target; UCOL_LESS if source (up to the specified * length) is less than target. * @stable ICU 2.6 */ U_I18N_API virtual UCollationResult compare(const UnicodeString& source, const UnicodeString& target, int32_t length, UErrorCode& status) const override; /** * The comparison function compares the character data stored in two * different string arrays. Returns information about whether a string array * is less than, greater than or equal to another string array. * @param source the source string array to be compared with. * @param sourceLength the length of the source string array. If this value * is equal to -1, the string array is null-terminated. * @param target the string that is to be compared with the source string. * @param targetLength the length of the target string array. If this value * is equal to -1, the string array is null-terminated. * @param status possible error code * @return Returns an enum value. UCOL_GREATER if source is greater * than target; UCOL_EQUAL if source is equal to target; UCOL_LESS if source is less * than target * @stable ICU 2.6 */ U_I18N_API virtual UCollationResult compare(const char16_t* source, int32_t sourceLength, const char16_t* target, int32_t targetLength, UErrorCode& status) const override; /** * Compares two strings using the Collator. * Returns whether the first one compares less than/equal to/greater than * the second one. * This version takes UCharIterator input. * @param sIter the first ("source") string iterator * @param tIter the second ("target") string iterator * @param status ICU status * @return UCOL_LESS, UCOL_EQUAL or UCOL_GREATER * @stable ICU 4.2 */ U_I18N_API virtual UCollationResult compare(UCharIterator& sIter, UCharIterator& tIter, UErrorCode& status) const override; /** * Compares two UTF-8 strings using the Collator. * Returns whether the first one compares less than/equal to/greater than * the second one. * This version takes UTF-8 input. * Note that a StringPiece can be implicitly constructed * from a std::string or a NUL-terminated const char * string. * @param source the first UTF-8 string * @param target the second UTF-8 string * @param status ICU status * @return UCOL_LESS, UCOL_EQUAL or UCOL_GREATER * @stable ICU 51 */ U_I18N_API virtual UCollationResult compareUTF8(const StringPiece& source, const StringPiece& target, UErrorCode& status) const override; /** * Transforms the string into a series of characters * that can be compared with CollationKey.compare(). * * Note that sort keys are often less efficient than simply doing comparison. * For more details, see the ICU User Guide. * * @param source the source string. * @param key the transformed key of the source string. * @param status the error code status. * @return the transformed key. * @see CollationKey * @stable ICU 2.0 */ U_I18N_API virtual CollationKey& getCollationKey(const UnicodeString& source, CollationKey& key, UErrorCode& status) const override; /** * Transforms a specified region of the string into a series of characters * that can be compared with CollationKey.compare. * * Note that sort keys are often less efficient than simply doing comparison. * For more details, see the ICU User Guide. * * @param source the source string. * @param sourceLength the length of the source string. * @param key the transformed key of the source string. * @param status the error code status. * @return the transformed key. * @see CollationKey * @stable ICU 2.0 */ U_I18N_API virtual CollationKey& getCollationKey(const char16_t* source, int32_t sourceLength, CollationKey& key, UErrorCode& status) const override; /** * Generates the hash code for the rule-based collation object. * @return the hash code. * @stable ICU 2.0 */ U_I18N_API virtual int32_t hashCode() const override; #ifndef U_FORCE_HIDE_DEPRECATED_API /** * Gets the locale of the Collator * @param type can be either requested, valid or actual locale. For more * information see the definition of ULocDataLocaleType in * uloc.h * @param status the error code status. * @return locale where the collation data lives. If the collator * was instantiated from rules, locale is empty. * @deprecated ICU 2.8 likely to change in ICU 3.0, based on feedback */ U_I18N_API virtual Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const override; #endif // U_FORCE_HIDE_DEPRECATED_API /** * Gets the tailoring rules for this collator. * @return the collation tailoring from which this collator was created * @stable ICU 2.0 */ U_I18N_API const UnicodeString& getRules() const; /** * Gets the version information for a Collator. * @param info the version # information, the result will be filled in * @stable ICU 2.0 */ U_I18N_API virtual void getVersion(UVersionInfo info) const override; #ifndef U_HIDE_DEPRECATED_API /** * Returns the maximum length of any expansion sequences that end with the * specified comparison order. * * This is specific to the kind of collation element values and sequences * returned by the CollationElementIterator. * Call CollationElementIterator::getMaxExpansion() instead. * * @param order a collation order returned by CollationElementIterator::previous * or CollationElementIterator::next. * @return maximum size of the expansion sequences ending with the collation * element, or 1 if the collation element does not occur at the end of * any expansion sequence * @see CollationElementIterator#getMaxExpansion * @deprecated ICU 51 Use CollationElementIterator::getMaxExpansion() instead. */ U_I18N_API int32_t getMaxExpansion(int32_t order) const; #endif /* U_HIDE_DEPRECATED_API */ /** * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This * method is to implement a simple version of RTTI, since not all C++ * compilers support genuine RTTI. Polymorphic operator==() and clone() * methods call this method. * @return The class ID for this object. All objects of a given class have * the same class ID. Objects of other classes have different class * IDs. * @stable ICU 2.0 */ U_I18N_API virtual UClassID getDynamicClassID() const override; /** * Returns the class ID for this class. This is useful only for comparing to * a return value from getDynamicClassID(). For example: * 

     * Base* polymorphic_pointer = createPolymorphicObject();
     * if (polymorphic_pointer->getDynamicClassID() ==
     *                                          Derived::getStaticClassID()) ...
     *
* @return The class ID for all objects of this class. * @stable ICU 2.0 */ U_I18N_API static UClassID getStaticClassID(); #ifndef U_HIDE_DEPRECATED_API /** * Do not use this method: The caller and the ICU library might use different heaps. * Use cloneBinary() instead which writes to caller-provided memory. * * Returns a binary format of this collator. * @param length Returns the length of the data, in bytes * @param status the error code status. * @return memory, owned by the caller, of size 'length' bytes. * @deprecated ICU 52. Use cloneBinary() instead. */ U_I18N_API uint8_t* cloneRuleData(int32_t& length, UErrorCode& status) const; #endif /* U_HIDE_DEPRECATED_API */ /** Creates a binary image of a collator. This binary image can be stored and * later used to instantiate a collator using ucol_openBinary. * This API supports preflighting. * @param buffer a fill-in buffer to receive the binary image * @param capacity capacity of the destination buffer * @param status for catching errors * @return size of the image * @see ucol_openBinary * @stable ICU 3.4 */ U_I18N_API int32_t cloneBinary(uint8_t* buffer, int32_t capacity, UErrorCode& status) const; /** * Returns current rules. Delta defines whether full rules are returned or * just the tailoring. * * getRules(void) should normally be used instead. * See https://unicode-org.github.io/icu/userguide/collation/customization#building-on-existing-locales * @param delta one of UCOL_TAILORING_ONLY, UCOL_FULL_RULES. * @param buffer UnicodeString to store the result rules * @stable ICU 2.2 * @see UCOL_FULL_RULES */ U_I18N_API void getRules(UColRuleOption delta, UnicodeString& buffer) const; /** * Universal attribute setter * @param attr attribute type * @param value attribute value * @param status to indicate whether the operation went on smoothly or there were errors * @stable ICU 2.2 */ U_I18N_API virtual void setAttribute(UColAttribute attr, UColAttributeValue value, UErrorCode& status) override; /** * Universal attribute getter. * @param attr attribute type * @param status to indicate whether the operation went on smoothly or there were errors * @return attribute value * @stable ICU 2.2 */ U_I18N_API virtual UColAttributeValue getAttribute(UColAttribute attr, UErrorCode& status) const override; /** * Sets the variable top to the top of the specified reordering group. * The variable top determines the highest-sorting character * which is affected by UCOL_ALTERNATE_HANDLING. * If that attribute is set to UCOL_NON_IGNORABLE, then the variable top has no effect. * @param group one of UCOL_REORDER_CODE_SPACE, UCOL_REORDER_CODE_PUNCTUATION, * UCOL_REORDER_CODE_SYMBOL, UCOL_REORDER_CODE_CURRENCY; * or UCOL_REORDER_CODE_DEFAULT to restore the default max variable group * @param errorCode Standard ICU error code. Its input value must * pass the U_SUCCESS() test, or else the function returns * immediately. Check for U_FAILURE() on output or use with * function chaining. (See User Guide for details.) * @return *this * @see getMaxVariable * @stable ICU 53 */ U_I18N_API virtual Collator& setMaxVariable(UColReorderCode group, UErrorCode& errorCode) override; /** * Returns the maximum reordering group whose characters are affected by UCOL_ALTERNATE_HANDLING. * @return the maximum variable reordering group. * @see setMaxVariable * @stable ICU 53 */ U_I18N_API virtual UColReorderCode getMaxVariable() const override; #ifndef U_FORCE_HIDE_DEPRECATED_API /** * Sets the variable top to the primary weight of the specified string. * * Beginning with ICU 53, the variable top is pinned to * the top of one of the supported reordering groups, * and it must not be beyond the last of those groups. * See setMaxVariable(). * @param varTop one or more (if contraction) char16_ts to which the variable top should be set * @param len length of variable top string. If -1 it is considered to be zero terminated. * @param status error code. If error code is set, the return value is undefined. Errors set by this function are:
* U_CE_NOT_FOUND_ERROR if more than one character was passed and there is no such contraction
* U_ILLEGAL_ARGUMENT_ERROR if the variable top is beyond * the last reordering group supported by setMaxVariable() * @return variable top primary weight * @deprecated ICU 53 Call setMaxVariable() instead. */ U_I18N_API virtual uint32_t setVariableTop(const char16_t* varTop, int32_t len, UErrorCode& status) override; /** * Sets the variable top to the primary weight of the specified string. * * Beginning with ICU 53, the variable top is pinned to * the top of one of the supported reordering groups, * and it must not be beyond the last of those groups. * See setMaxVariable(). * @param varTop a UnicodeString size 1 or more (if contraction) of char16_ts to which the variable top should be set * @param status error code. If error code is set, the return value is undefined. Errors set by this function are:
* U_CE_NOT_FOUND_ERROR if more than one character was passed and there is no such contraction
* U_ILLEGAL_ARGUMENT_ERROR if the variable top is beyond * the last reordering group supported by setMaxVariable() * @return variable top primary weight * @deprecated ICU 53 Call setMaxVariable() instead. */ U_I18N_API virtual uint32_t setVariableTop(const UnicodeString& varTop, UErrorCode& status) override; /** * Sets the variable top to the specified primary weight. * * Beginning with ICU 53, the variable top is pinned to * the top of one of the supported reordering groups, * and it must not be beyond the last of those groups. * See setMaxVariable(). * @param varTop primary weight, as returned by setVariableTop or ucol_getVariableTop * @param status error code * @deprecated ICU 53 Call setMaxVariable() instead. */ U_I18N_API virtual void setVariableTop(uint32_t varTop, UErrorCode& status) override; #endif // U_FORCE_HIDE_DEPRECATED_API /** * Gets the variable top value of a Collator. * @param status error code (not changed by function). If error code is set, the return value is undefined. * @return the variable top primary weight * @see getMaxVariable * @stable ICU 2.0 */ U_I18N_API virtual uint32_t getVariableTop(UErrorCode& status) const override; /** * Get a UnicodeSet that contains all the characters and sequences tailored in * this collator. * @param status error code of the operation * @return a pointer to a UnicodeSet object containing all the * code points and sequences that may sort differently than * in the root collator. The object must be disposed of by using delete * @stable ICU 2.4 */ U_I18N_API virtual UnicodeSet* getTailoredSet(UErrorCode& status) const override; /** * Get the sort key as an array of bytes from a UnicodeString. * * Note that sort keys are often less efficient than simply doing comparison. * For more details, see the ICU User Guide. * * @param source string to be processed. * @param result buffer to store result in. If nullptr, number of bytes needed * will be returned. * @param resultLength length of the result buffer. If if not enough the * buffer will be filled to capacity. * @return Number of bytes needed for storing the sort key * @stable ICU 2.0 */ U_I18N_API virtual int32_t getSortKey(const UnicodeString& source, uint8_t* result, int32_t resultLength) const override; /** * Get the sort key as an array of bytes from a char16_t buffer. * * Note that sort keys are often less efficient than simply doing comparison. * For more details, see the ICU User Guide. * * @param source string to be processed. * @param sourceLength length of string to be processed. If -1, the string * is 0 terminated and length will be decided by the function. * @param result buffer to store result in. If nullptr, number of bytes needed * will be returned. * @param resultLength length of the result buffer. If if not enough the * buffer will be filled to capacity. * @return Number of bytes needed for storing the sort key * @stable ICU 2.2 */ U_I18N_API virtual int32_t getSortKey(const char16_t* source, int32_t sourceLength, uint8_t* result, int32_t resultLength) const override; /** * Retrieves the reordering codes for this collator. * @param dest The array to fill with the script ordering. * @param destCapacity The length of dest. If it is 0, then dest may be nullptr and the function * will only return the length of the result without writing any codes (pre-flighting). * @param status A reference to an error code value, which must not indicate * a failure before the function call. * @return The length of the script ordering array. * @see ucol_setReorderCodes * @see Collator#getEquivalentReorderCodes * @see Collator#setReorderCodes * @stable ICU 4.8 */ U_I18N_API virtual int32_t getReorderCodes(int32_t* dest, int32_t destCapacity, UErrorCode& status) const override; /** * Sets the ordering of scripts for this collator. * @param reorderCodes An array of script codes in the new order. This can be nullptr if the * length is also set to 0. An empty array will clear any reordering codes on the collator. * @param reorderCodesLength The length of reorderCodes. * @param status error code * @see ucol_setReorderCodes * @see Collator#getReorderCodes * @see Collator#getEquivalentReorderCodes * @stable ICU 4.8 */ U_I18N_API virtual void setReorderCodes(const int32_t* reorderCodes, int32_t reorderCodesLength, UErrorCode& status) override; /** * Implements ucol_strcollUTF8(). * @internal */ U_I18N_API virtual UCollationResult internalCompareUTF8(const char* left, int32_t leftLength, const char* right, int32_t rightLength, UErrorCode& errorCode) const override; /** Get the short definition string for a collator. This internal API harvests the collator's * locale and the attribute set and produces a string that can be used for opening * a collator with the same attributes using the ucol_openFromShortString API. * This string will be normalized. * The structure and the syntax of the string is defined in the "Naming collators" * section of the users guide: * https://unicode-org.github.io/icu/userguide/collation/concepts#collator-naming-scheme * This function supports preflighting. * * This is internal, and intended to be used with delegate converters. * * @param locale a locale that will appear as a collators locale in the resulting * short string definition. If nullptr, the locale will be harvested * from the collator. * @param buffer space to hold the resulting string * @param capacity capacity of the buffer * @param status for returning errors. All the preflighting errors are featured * @return length of the resulting string * @see ucol_openFromShortString * @see ucol_normalizeShortDefinitionString * @see ucol_getShortDefinitionString * @internal */ U_I18N_API virtual int32_t internalGetShortDefinitionString(const char* locale, char* buffer, int32_t capacity, UErrorCode& status) const override; /** * Implements ucol_nextSortKeyPart(). * @internal */ U_I18N_API virtual int32_t internalNextSortKeyPart(UCharIterator* iter, uint32_t state[2], uint8_t* dest, int32_t count, UErrorCode& errorCode) const override; // Do not enclose the default constructor with #ifndef U_HIDE_INTERNAL_API /** * Only for use in ucol_openRules(). * @internal */ U_I18N_API RuleBasedCollator(); #ifndef U_HIDE_INTERNAL_API /** * Implements ucol_getLocaleByType(). * Needed because the lifetime of the locale ID string must match that of the collator. * getLocale() returns a copy of a Locale, with minimal lifetime in a C wrapper. * @internal */ U_I18N_API const char* internalGetLocaleID(ULocDataLocaleType type, UErrorCode& errorCode) const; /** * Implements ucol_getContractionsAndExpansions(). * Gets this collator's sets of contraction strings and/or * characters and strings that map to multiple collation elements (expansions). * If addPrefixes is true, then contractions that are expressed as * prefix/pre-context rules are included. * @param contractions if not nullptr, the set to hold the contractions * @param expansions if not nullptr, the set to hold the expansions * @param addPrefixes include prefix contextual mappings * @param errorCode in/out ICU error code * @internal */ U_I18N_API void internalGetContractionsAndExpansions(UnicodeSet* contractions, UnicodeSet* expansions, UBool addPrefixes, UErrorCode& errorCode) const; /** * Adds the contractions that start with character c to the set. * Ignores prefixes. Used by AlphabeticIndex. * @internal */ U_I18N_API void internalAddContractions(UChar32 c, UnicodeSet& set, UErrorCode& errorCode) const; /** * Implements from-rule constructors, and ucol_openRules(). * @internal */ U_I18N_API void internalBuildTailoring(const UnicodeString& rules, int32_t strength, UColAttributeValue decompositionMode, UParseError* outParseError, UnicodeString* outReason, UErrorCode& errorCode); /** @internal */ static inline RuleBasedCollator *rbcFromUCollator(UCollator *uc) { return dynamic_cast(fromUCollator(uc)); } /** @internal */ static inline const RuleBasedCollator *rbcFromUCollator(const UCollator *uc) { return dynamic_cast(fromUCollator(uc)); } /** * Appends the CEs for the string to the vector. * @internal for tests & tools */ U_I18N_API void internalGetCEs(const UnicodeString& str, UVector64& ces, UErrorCode& errorCode) const; #endif // U_HIDE_INTERNAL_API protected: /** * Used internally by registration to define the requested and valid locales. * @param requestedLocale the requested locale * @param validLocale the valid locale * @param actualLocale the actual locale * @internal */ U_I18N_API virtual void setLocales(const Locale& requestedLocale, const Locale& validLocale, const Locale& actualLocale) override; private: friend class CollationElementIterator; friend class Collator; RuleBasedCollator(const CollationCacheEntry *entry); /** * Enumeration of attributes that are relevant for short definition strings * (e.g., ucol_getShortDefinitionString()). * Effectively extends UColAttribute. */ enum Attributes { ATTR_VARIABLE_TOP = UCOL_ATTRIBUTE_COUNT, ATTR_LIMIT }; void adoptTailoring(CollationTailoring *t, UErrorCode &errorCode); // Both lengths must be <0 or else both must be >=0. UCollationResult doCompare(const char16_t *left, int32_t leftLength, const char16_t *right, int32_t rightLength, UErrorCode &errorCode) const; UCollationResult doCompare(const uint8_t *left, int32_t leftLength, const uint8_t *right, int32_t rightLength, UErrorCode &errorCode) const; void writeSortKey(const char16_t *s, int32_t length, SortKeyByteSink &sink, UErrorCode &errorCode) const; void writeIdenticalLevel(const char16_t *s, const char16_t *limit, SortKeyByteSink &sink, UErrorCode &errorCode) const; const CollationSettings &getDefaultSettings() const; void setAttributeDefault(int32_t attribute) { explicitlySetAttributes &= ~(static_cast(1) << attribute); } void setAttributeExplicitly(int32_t attribute) { explicitlySetAttributes |= static_cast(1) << attribute; } UBool attributeHasBeenSetExplicitly(int32_t attribute) const { // assert(0 <= attribute < ATTR_LIMIT); return (explicitlySetAttributes & (static_cast(1) << attribute)) != 0; } /** * Tests whether a character is "unsafe" for use as a collation starting point. * * @param c code point or code unit * @return true if c is unsafe * @see CollationElementIterator#setOffset(int) */ UBool isUnsafe(UChar32 c) const; static void U_CALLCONV computeMaxExpansions(const CollationTailoring *t, UErrorCode &errorCode); UBool initMaxExpansions(UErrorCode &errorCode) const; void setFastLatinOptions(CollationSettings &ownedSettings) const; const CollationData *data; const CollationSettings *settings; // reference-counted const CollationTailoring *tailoring; // alias of cacheEntry->tailoring const CollationCacheEntry *cacheEntry; // reference-counted Locale validLocale; uint32_t explicitlySetAttributes; UBool actualLocaleIsSameAsValid; }; U_NAMESPACE_END #endif // !UCONFIG_NO_COLLATION #endif /* U_SHOW_CPLUSPLUS_API */ #endif // TBLCOLL_H