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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.
* <p>
* For more information about the collation service see
* <a href="https://unicode-org.github.io/icu/userguide/collation">the User Guide</a>.
* <p>
* 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 <a href="http://www.unicode.org/reports/tr35/tr35-collation.html#Root_Collation">CLDR root sort order</a>.
* <p>
* Sort ordering may be customized by providing your own set of rules. For more on
* this subject see the <a href="https://unicode-org.github.io/icu/userguide/collation/customization">
* Collation Customization</a> section of the User Guide.
* <p>
* Note, RuleBasedCollator is not to be subclassed.
* @see Collator
*/
class U_I18N_API 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
*/
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
*/
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
*/
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
*/
RuleBasedCollator(const UnicodeString& rules,
ECollationStrength collationStrength,
UColAttributeValue decompositionMode,
UErrorCode& status);
#ifndef U_HIDE_INTERNAL_API
/**
* TODO: document & propose as public API
* @internal
*/
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
*/
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
*/
RuleBasedCollator(const uint8_t *bin, int32_t length,
const RuleBasedCollator *base,
UErrorCode &status);
/**
* Destructor.
* @stable ICU 2.0
*/
virtual ~RuleBasedCollator();
/**
* Assignment operator.
* @param other other RuleBasedCollator object to copy from.
* @stable ICU 2.0
*/
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
*/
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
*/
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
*/
virtual 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
*/
virtual 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
**/
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
*/
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
*/
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
*/
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
*/
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
*/
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
*/
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
*/
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
*/
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
*/
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
*/
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.
*/
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
*/
virtual UClassID getDynamicClassID(void) const override;
/**
* Returns the class ID for this class. This is useful only for comparing to
* a return value from getDynamicClassID(). For example:
* <pre>
* Base* polymorphic_pointer = createPolymorphicObject();
* if (polymorphic_pointer->getDynamicClassID() ==
* Derived::getStaticClassID()) ...
* </pre>
* @return The class ID for all objects of this class.
* @stable ICU 2.0
*/
static UClassID U_EXPORT2 getStaticClassID(void);
#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.
*/
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
*/
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
*/
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
*/
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
*/
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
*/
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
*/
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: <br>
* U_CE_NOT_FOUND_ERROR if more than one character was passed and there is no such contraction<br>
* 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.
*/
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: <br>
* U_CE_NOT_FOUND_ERROR if more than one character was passed and there is no such contraction<br>
* 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.
*/
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.
*/
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
*/
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
*/
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
*/
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
*/
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
*/
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
*/
virtual void setReorderCodes(const int32_t* reorderCodes,
int32_t reorderCodesLength,
UErrorCode& status) override;
/**
* Implements ucol_strcollUTF8().
* @internal
*/
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
*/
virtual int32_t internalGetShortDefinitionString(const char *locale,
char *buffer,
int32_t capacity,
UErrorCode &status) const override;
/**
* Implements ucol_nextSortKeyPart().
* @internal
*/
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
*/
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
*/
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
*/
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
*/
void internalAddContractions(UChar32 c, UnicodeSet &set, UErrorCode &errorCode) const;
/**
* Implements from-rule constructors, and ucol_openRules().
* @internal
*/
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<RuleBasedCollator *>(fromUCollator(uc));
}
/** @internal */
static inline const RuleBasedCollator *rbcFromUCollator(const UCollator *uc) {
return dynamic_cast<const RuleBasedCollator *>(fromUCollator(uc));
}
/**
* Appends the CEs for the string to the vector.
* @internal for tests & tools
*/
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
*/
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 &= ~((uint32_t)1 << attribute);
}
void setAttributeExplicitly(int32_t attribute) {
explicitlySetAttributes |= (uint32_t)1 << attribute;
}
UBool attributeHasBeenSetExplicitly(int32_t attribute) const {
// assert(0 <= attribute < ATTR_LIMIT);
return (UBool)((explicitlySetAttributes & ((uint32_t)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