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ðŸ“„ alphaindex.h(26.48 KB)
ðŸ“„ appendable.h(8.49 KB)
ðŸ“„ basictz.h(9.15 KB)
ðŸ“„ brkiter.h(27.8 KB)
ðŸ“„ bytestream.h(9.6 KB)
ðŸ“„ bytestrie.h(20.77 KB)
ðŸ“„ bytestriebuilder.h(7.08 KB)
ðŸ“„ calendar.h(105.74 KB)
ðŸ“„ caniter.h(7.43 KB)
ðŸ“„ casemap.h(25.33 KB)
ðŸ“„ char16ptr.h(7.22 KB)
ðŸ“„ chariter.h(24.05 KB)
ðŸ“„ choicfmt.h(23.91 KB)
ðŸ“„ coleitr.h(13.76 KB)
ðŸ“„ coll.h(56.23 KB)
ðŸ“„ compactdecimalformat.h(6.88 KB)
ðŸ“„ curramt.h(3.76 KB)
ðŸ“„ currpinf.h(7.3 KB)
ðŸ“„ currunit.h(4.05 KB)
ðŸ“„ datefmt.h(40.67 KB)
ðŸ“„ dbbi.h(1.19 KB)
ðŸ“„ dcfmtsym.h(20.13 KB)
ðŸ“„ decimfmt.h(87.38 KB)
ðŸ“„ docmain.h(6.97 KB)
ðŸ“„ dtfmtsym.h(37.7 KB)
ðŸ“„ dtintrv.h(3.84 KB)
ðŸ“„ dtitvfmt.h(46.63 KB)
ðŸ“„ dtitvinf.h(18.51 KB)
ðŸ“„ dtptngen.h(25.08 KB)
ðŸ“„ dtrule.h(8.68 KB)
ðŸ“„ edits.h(20.74 KB)
ðŸ“„ enumset.h(2.08 KB)
ðŸ“„ errorcode.h(4.84 KB)
ðŸ“„ fieldpos.h(8.69 KB)
ðŸ“„ filteredbrk.h(5.37 KB)
ðŸ“„ fmtable.h(24.42 KB)
ðŸ“„ format.h(12.5 KB)
ðŸ“„ formattedvalue.h(10.27 KB)
ðŸ“„ fpositer.h(3.04 KB)
ðŸ“„ gender.h(3.33 KB)
ðŸ“„ gregocal.h(31.71 KB)
ðŸ“„ icudataver.h(1.03 KB)
ðŸ“„ icuplug.h(11.88 KB)
ðŸ“„ idna.h(12.7 KB)
ðŸ“„ listformatter.h(9.47 KB)
ðŸ“„ localebuilder.h(11.27 KB)
ðŸ“„ localematcher.h(22.5 KB)
ðŸ“„ localpointer.h(19.69 KB)
ðŸ“„ locdspnm.h(7.12 KB)
ðŸ“„ locid.h(47.4 KB)
ðŸ“„ measfmt.h(11.33 KB)
ðŸ“„ measunit.h(93.31 KB)
ðŸ“„ measure.h(4.32 KB)
ðŸ“„ messagepattern.h(33.71 KB)
ðŸ“„ msgfmt.h(44.11 KB)
ðŸ“„ normalizer2.h(34.03 KB)
ðŸ“„ normlzr.h(30.94 KB)
ðŸ“„ nounit.h(2.69 KB)
ðŸ“„ numberformatter.h(86.31 KB)
ðŸ“„ numberrangeformatter.h(30.14 KB)
ðŸ“„ numfmt.h(49.81 KB)
ðŸ“„ numsys.h(7.19 KB)
ðŸ“„ parseerr.h(3.08 KB)
ðŸ“„ parsepos.h(5.56 KB)
ðŸ“„ platform.h(28.08 KB)
ðŸ“„ plurfmt.h(25.2 KB)
ðŸ“„ plurrule.h(18.39 KB)
ðŸ“„ ptypes.h(3.49 KB)
ðŸ“„ putil.h(6.33 KB)
ðŸ“„ rbbi.h(26.58 KB)
ðŸ“„ rbnf.h(48.73 KB)
ðŸ“„ rbtz.h(15.6 KB)
ðŸ“„ regex.h(84.36 KB)
ðŸ“„ region.h(9.18 KB)
ðŸ“„ reldatefmt.h(22.62 KB)
ðŸ“„ rep.h(9.37 KB)
ðŸ“„ resbund.h(18.07 KB)
ðŸ“„ schriter.h(6.32 KB)
ðŸ“„ scientificnumberformatter.h(6.4 KB)
ðŸ“„ search.h(22.22 KB)
ðŸ“„ selfmt.h(14.3 KB)
ðŸ“„ simpleformatter.h(12.59 KB)
ðŸ“„ simpletz.h(45.44 KB)
ðŸ“„ smpdtfmt.h(70.97 KB)
ðŸ“„ sortkey.h(11.18 KB)
ðŸ“„ std_string.h(1.05 KB)
ðŸ“„ strenum.h(9.92 KB)
ðŸ“„ stringoptions.h(5.79 KB)
ðŸ“„ stringpiece.h(7.38 KB)
ðŸ“„ stringtriebuilder.h(15.33 KB)
ðŸ“„ stsearch.h(21.3 KB)
ðŸ“„ symtable.h(4.27 KB)
ðŸ“„ tblcoll.h(36.61 KB)
ðŸ“„ timezone.h(41.02 KB)
ðŸ“„ tmunit.h(3.38 KB)
ðŸ“„ tmutamt.h(4.9 KB)
ðŸ“„ tmutfmt.h(7.85 KB)
ðŸ“„ translit.h(65.82 KB)
ðŸ“„ tzfmt.h(42.89 KB)
ðŸ“„ tznames.h(16.85 KB)
ðŸ“„ tzrule.h(35.37 KB)
ðŸ“„ tztrans.h(6.12 KB)
ðŸ“„ ubidi.h(89.56 KB)
ðŸ“„ ubiditransform.h(12.65 KB)
ðŸ“„ ubrk.h(23.97 KB)
ðŸ“„ ucal.h(56.9 KB)
ðŸ“„ ucasemap.h(15.18 KB)
ðŸ“„ ucat.h(5.36 KB)
ðŸ“„ uchar.h(140.56 KB)
ðŸ“„ ucharstrie.h(22.58 KB)
ðŸ“„ ucharstriebuilder.h(7.21 KB)
ðŸ“„ uchriter.h(13.2 KB)
ðŸ“„ uclean.h(11.21 KB)
ðŸ“„ ucnv.h(83.09 KB)
ðŸ“„ ucnv_cb.h(6.59 KB)
ðŸ“„ ucnv_err.h(20.99 KB)
ðŸ“„ ucnvsel.h(6.14 KB)
ðŸ“„ ucol.h(61.46 KB)
ðŸ“„ ucoleitr.h(9.46 KB)
ðŸ“„ uconfig.h(12.07 KB)
ðŸ“„ ucpmap.h(5.53 KB)
ðŸ“„ ucptrie.h(22.46 KB)
ðŸ“„ ucsdet.h(14.67 KB)
ðŸ“„ ucurr.h(16.12 KB)
ðŸ“„ udat.h(60.88 KB)
ðŸ“„ udata.h(15.56 KB)
ðŸ“„ udateintervalformat.h(10.03 KB)
ðŸ“„ udatpg.h(26.01 KB)
ðŸ“„ udisplaycontext.h(5.89 KB)
ðŸ“„ uenum.h(7.78 KB)
ðŸ“„ ufieldpositer.h(4.36 KB)
ðŸ“„ uformattable.h(10.94 KB)
ðŸ“„ uformattedvalue.h(12.14 KB)
ðŸ“„ ugender.h(2 KB)
ðŸ“„ uidna.h(33.37 KB)
ðŸ“„ uiter.h(22.77 KB)
ðŸ“„ uldnames.h(10.45 KB)
ðŸ“„ ulistformatter.h(8.83 KB)
ðŸ“„ uloc.h(52.54 KB)
ðŸ“„ ulocdata.h(11.26 KB)
ðŸ“„ umachine.h(14.53 KB)
ðŸ“„ umisc.h(1.33 KB)
ðŸ“„ umsg.h(24.23 KB)
ðŸ“„ umutablecptrie.h(8.24 KB)
ðŸ“„ unifilt.h(3.96 KB)
ðŸ“„ unifunct.h(4.04 KB)
ðŸ“„ unimatch.h(6.1 KB)
ðŸ“„ unirepl.h(3.38 KB)
ðŸ“„ uniset.h(64.9 KB)
ðŸ“„ unistr.h(170.43 KB)
ðŸ“„ unorm.h(20.52 KB)
ðŸ“„ unorm2.h(24.66 KB)
ðŸ“„ unum.h(53.62 KB)
ðŸ“„ unumberformatter.h(25.36 KB)
ðŸ“„ unumsys.h(7.21 KB)
ðŸ“„ uobject.h(10.68 KB)
ðŸ“„ upluralrules.h(7.88 KB)
ðŸ“„ uregex.h(72.05 KB)
ðŸ“„ uregion.h(9.84 KB)
ðŸ“„ ureldatefmt.h(17.26 KB)
ðŸ“„ urename.h(130.97 KB)
ðŸ“„ urep.h(5.38 KB)
ðŸ“„ ures.h(36.54 KB)
ðŸ“„ uscript.h(26.87 KB)
ðŸ“„ usearch.h(38.12 KB)
ðŸ“„ uset.h(40 KB)
ðŸ“„ usetiter.h(9.55 KB)
ðŸ“„ ushape.h(18 KB)
ðŸ“„ uspoof.h(65.9 KB)
ðŸ“„ usprep.h(8.14 KB)
ðŸ“„ ustdio.h(38.54 KB)
ðŸ“„ ustream.h(1.89 KB)
ðŸ“„ ustring.h(72.47 KB)
ðŸ“„ ustringtrie.h(3.15 KB)
ðŸ“„ utext.h(58.13 KB)
ðŸ“„ utf.h(7.86 KB)
ðŸ“„ utf16.h(23.32 KB)
ðŸ“„ utf32.h(763 B)
ðŸ“„ utf8.h(30.96 KB)
ðŸ“„ utf_old.h(45.83 KB)
ðŸ“„ utmscale.h(13.78 KB)
ðŸ“„ utrace.h(15.73 KB)
ðŸ“„ utrans.h(25.52 KB)
ðŸ“„ utypes.h(30.74 KB)
ðŸ“„ uvernum.h(6.67 KB)
ðŸ“„ uversion.h(6 KB)
ðŸ“„ vtzone.h(20.3 KB)

Editing: coleitr.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
 ******************************************************************************
 *   Copyright (C) 1997-2014, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 ******************************************************************************
 */

/**
 * \file 
 * \brief C++ API: Collation Element Iterator.
 */

/**
* File coleitr.h
*
* Created by: Helena Shih
*
* Modification History:
*
*  Date       Name        Description
*
*  8/18/97    helena      Added internal API documentation.
* 08/03/98    erm         Synched with 1.2 version CollationElementIterator.java
* 12/10/99    aliu        Ported Thai collation support from Java.
* 01/25/01    swquek      Modified into a C++ wrapper calling C APIs (ucoliter.h)
* 02/19/01    swquek      Removed CollationElementsIterator() since it is 
*                         private constructor and no calls are made to it
* 2012-2014   markus      Rewritten in C++ again.
*/

#ifndef COLEITR_H
#define COLEITR_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_COLLATION

#include "unicode/unistr.h"
#include "unicode/uobject.h"

struct UCollationElements;
struct UHashtable;

U_NAMESPACE_BEGIN

struct CollationData;

class CharacterIterator;
class CollationIterator;
class RuleBasedCollator;
class UCollationPCE;
class UVector32;

/**
* The CollationElementIterator class is used as an iterator to walk through 
* each character of an international string. Use the iterator to return the
* ordering priority of the positioned character. The ordering priority of a 
* character, which we refer to as a key, defines how a character is collated in 
* the given collation object.
* For example, consider the following in Slovak and in traditional Spanish collation:
* <pre>
* "ca" -> the first key is key('c') and second key is key('a').
* "cha" -> the first key is key('ch') and second key is key('a').</pre>
* And in German phonebook collation,
* <pre> \htmlonly "&#x00E6;b"-> the first key is key('a'), the second key is key('e'), and
* the third key is key('b'). \endhtmlonly </pre>
* The key of a character, is an integer composed of primary order(short),
* secondary order(char), and tertiary order(char). Java strictly defines the 
* size and signedness of its primitive data types. Therefore, the static
* functions primaryOrder(), secondaryOrder(), and tertiaryOrder() return 
* int32_t to ensure the correctness of the key value.
* Example of the iterator usage: (without error checking)
* <pre>
* \code
* void CollationElementIterator_Example()
* {
* UnicodeString str = "This is a test";
* UErrorCode success = U_ZERO_ERROR;
* RuleBasedCollator* rbc =
* (RuleBasedCollator*) RuleBasedCollator::createInstance(success);
* CollationElementIterator* c =
* rbc->createCollationElementIterator( str );
* int32_t order = c->next(success);
* c->reset();
* order = c->previous(success);
* delete c;
* delete rbc;
* }
* \endcode
* </pre>
* 
* The method next() returns the collation order of the next character based on
* the comparison level of the collator. The method previous() returns the
* collation order of the previous character based on the comparison level of
* the collator. The Collation Element Iterator moves only in one direction
* between calls to reset(), setOffset(), or setText(). That is, next() 
* and previous() can not be inter-used. Whenever previous() is to be called after 
* next() or vice versa, reset(), setOffset() or setText() has to be called first
* to reset the status, shifting pointers to either the end or the start of
* the string (reset() or setText()), or the specified position (setOffset()).
* Hence at the next call of next() or previous(), the first or last collation order,
* or collation order at the spefcifieid position will be returned. If a change of
* direction is done without one of these calls, the result is undefined.
* 
* The result of a forward iterate (next()) and reversed result of the backward
* iterate (previous()) on the same string are equivalent, if collation orders
* with the value 0 are ignored.
* Character based on the comparison level of the collator. A collation order 
* consists of primary order, secondary order and tertiary order. The data 
* type of the collation order is int32_t. 
*
* Note, CollationElementIterator should not be subclassed.
* @see Collator
* @see RuleBasedCollator
* @version 1.8 Jan 16 2001
*/
class U_I18N_API CollationElementIterator U_FINAL : public UObject {
public:

// CollationElementIterator public data member ------------------------------

enum {
        /**
         * NULLORDER indicates that an error has occured while processing
         * @stable ICU 2.0
         */
        NULLORDER = (int32_t)0xffffffff
    };

// CollationElementIterator public constructor/destructor -------------------

/**
    * Copy constructor.
    *
    * @param other    the object to be copied from
    * @stable ICU 2.0
    */
    CollationElementIterator(const CollationElementIterator& other);

/** 
    * Destructor
    * @stable ICU 2.0
    */
    virtual ~CollationElementIterator();

// CollationElementIterator public methods ----------------------------------

/**
    * Returns true if "other" is the same as "this"
    *
    * @param other    the object to be compared
    * @return         true if "other" is the same as "this"
    * @stable ICU 2.0
    */
    UBool operator==(const CollationElementIterator& other) const;

/**
    * Returns true if "other" is not the same as "this".
    *
    * @param other    the object to be compared
    * @return         true if "other" is not the same as "this"
    * @stable ICU 2.0
    */
    UBool operator!=(const CollationElementIterator& other) const;

/**
    * Resets the cursor to the beginning of the string.
    * @stable ICU 2.0
    */
    void reset(void);

/**
    * Gets the ordering priority of the next character in the string.
    * @param status the error code status.
    * @return the next character's ordering. otherwise returns NULLORDER if an 
    *         error has occured or if the end of string has been reached
    * @stable ICU 2.0
    */
    int32_t next(UErrorCode& status);

/**
    * Get the ordering priority of the previous collation element in the string.
    * @param status the error code status.
    * @return the previous element's ordering. otherwise returns NULLORDER if an 
    *         error has occured or if the start of string has been reached
    * @stable ICU 2.0
    */
    int32_t previous(UErrorCode& status);

/**
    * Gets the primary order of a collation order.
    * @param order the collation order
    * @return the primary order of a collation order.
    * @stable ICU 2.0
    */
    static inline int32_t primaryOrder(int32_t order);

/**
    * Gets the secondary order of a collation order.
    * @param order the collation order
    * @return the secondary order of a collation order.
    * @stable ICU 2.0
    */
    static inline int32_t secondaryOrder(int32_t order);

/**
    * Gets the tertiary order of a collation order.
    * @param order the collation order
    * @return the tertiary order of a collation order.
    * @stable ICU 2.0
    */
    static inline int32_t tertiaryOrder(int32_t order);

/**
    * Return the maximum length of any expansion sequences that end with the 
    * specified comparison order.
    * @param order a collation order returned by previous or next.
    * @return maximum size of the expansion sequences ending with the collation 
    *         element or 1 if collation element does not occur at the end of any 
    *         expansion sequence
    * @stable ICU 2.0
    */
    int32_t getMaxExpansion(int32_t order) const;

/**
    * Gets the comparison order in the desired strength. Ignore the other
    * differences.
    * @param order The order value
    * @stable ICU 2.0
    */
    int32_t strengthOrder(int32_t order) const;

/**
    * Sets the source string.
    * @param str the source string.
    * @param status the error code status.
    * @stable ICU 2.0
    */
    void setText(const UnicodeString& str, UErrorCode& status);

/**
    * Sets the source string.
    * @param str the source character iterator.
    * @param status the error code status.
    * @stable ICU 2.0
    */
    void setText(CharacterIterator& str, UErrorCode& status);

/**
    * Checks if a comparison order is ignorable.
    * @param order the collation order.
    * @return TRUE if a character is ignorable, FALSE otherwise.
    * @stable ICU 2.0
    */
    static inline UBool isIgnorable(int32_t order);

/**
    * Gets the offset of the currently processed character in the source string.
    * @return the offset of the character.
    * @stable ICU 2.0
    */
    int32_t getOffset(void) const;

/**
    * Sets the offset of the currently processed character in the source string.
    * @param newOffset the new offset.
    * @param status the error code status.
    * @return the offset of the character.
    * @stable ICU 2.0
    */
    void setOffset(int32_t newOffset, UErrorCode& status);

/**
    * ICU "poor man's RTTI", returns a UClassID for the actual class.
    *
    * @stable ICU 2.2
    */
    virtual UClassID getDynamicClassID() const;

/**
    * ICU "poor man's RTTI", returns a UClassID for this class.
    *
    * @stable ICU 2.2
    */
    static UClassID U_EXPORT2 getStaticClassID();

#ifndef U_HIDE_INTERNAL_API
 /** @internal */
 static inline CollationElementIterator *fromUCollationElements(UCollationElements *uc) {
 return reinterpret_cast<CollationElementIterator *>(uc);
 }
 /** @internal */
 static inline const CollationElementIterator *fromUCollationElements(const UCollationElements *uc) {
 return reinterpret_cast<const CollationElementIterator *>(uc);
 }
 /** @internal */
 inline UCollationElements *toUCollationElements() {
 return reinterpret_cast<UCollationElements *>(this);
 }
 /** @internal */
 inline const UCollationElements *toUCollationElements() const {
 return reinterpret_cast<const UCollationElements *>(this);
 }
#endif // U_HIDE_INTERNAL_API

private:
    friend class RuleBasedCollator;
    friend class UCollationPCE;

/**
    * CollationElementIterator constructor. This takes the source string and the 
    * collation object. The cursor will walk thru the source string based on the 
    * predefined collation rules. If the source string is empty, NULLORDER will 
    * be returned on the calls to next().
    * @param sourceText    the source string.
    * @param order         the collation object.
    * @param status        the error code status.
    */
    CollationElementIterator(const UnicodeString& sourceText,
        const RuleBasedCollator* order, UErrorCode& status);
    // Note: The constructors should take settings & tailoring, not a collator,
    // to avoid circular dependencies.
    // However, for operator==() we would need to be able to compare tailoring data for equality
    // without making CollationData or CollationTailoring depend on TailoredSet.
    // (See the implementation of RuleBasedCollator::operator==().)
    // That might require creating an intermediate class that would be used
    // by both CollationElementIterator and RuleBasedCollator
    // but only contain the part of RBC== related to data and rules.

/**
    * Assignment operator
    *
    * @param other    the object to be copied
    */
    const CollationElementIterator&
        operator=(const CollationElementIterator& other);

CollationElementIterator(); // default constructor not implemented

/** Normalizes dir_=1 (just after setOffset()) to dir_=0 (just after reset()). */
    inline int8_t normalizeDir() const { return dir_ == 1 ? 0 : dir_; }

static UHashtable *computeMaxExpansions(const CollationData *data, UErrorCode &errorCode);

static int32_t getMaxExpansion(const UHashtable *maxExpansions, int32_t order);

// CollationElementIterator private data members ----------------------------

CollationIterator *iter_; // owned
 const RuleBasedCollator *rbc_; // aliased
 uint32_t otherHalf_;
 /**
 * <0: backwards; 0: just after reset() (previous() begins from end);
 * 1: just after setOffset(); >1: forward
 */
 int8_t dir_;
 /**
 * Stores offsets from expansions and from unsafe-backwards iteration,
 * so that getOffset() returns intermediate offsets for the CEs
 * that are consistent with forward iteration.
 */
 UVector32 *offsets_;

UnicodeString string_;
};

// CollationElementIterator inline method definitions --------------------------

inline int32_t CollationElementIterator::primaryOrder(int32_t order)
{
    return (order >> 16) & 0xffff;
}

inline int32_t CollationElementIterator::secondaryOrder(int32_t order)
{
    return (order >> 8) & 0xff;
}

inline int32_t CollationElementIterator::tertiaryOrder(int32_t order)
{
    return order & 0xff;
}

inline UBool CollationElementIterator::isIgnorable(int32_t order)
{
    return (order & 0xffff0000) == 0;
}

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_COLLATION */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif

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