FM / unicode

/usr/include/unicode

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alphaindex.h	27118	0644	edit dl rm
appendable.h	8694	0644	edit dl rm
basictz.h	9491	0644	edit dl rm
brkiter.h	28464	0644	edit dl rm
bytestream.h	11037	0644	edit dl rm
bytestrie.h	21266	0644	edit dl rm
bytestriebuilder.h	7248	0644	edit dl rm
calendar.h	108278	0644	edit dl rm
caniter.h	7611	0644	edit dl rm
casemap.h	25933	0644	edit dl rm
char16ptr.h	7393	0644	edit dl rm
chariter.h	24632	0644	edit dl rm
choicfmt.h	24482	0644	edit dl rm
coleitr.h	14094	0644	edit dl rm
coll.h	57581	0644	edit dl rm
compactdecimalformat.h	7047	0644	edit dl rm
curramt.h	3851	0644	edit dl rm
currpinf.h	7473	0644	edit dl rm
currunit.h	4094	0644	edit dl rm
datefmt.h	41641	0644	edit dl rm
dbbi.h	1223	0644	edit dl rm
dcfmtsym.h	20897	0644	edit dl rm
decimfmt.h	89278	0644	edit dl rm
docmain.h	7142	0644	edit dl rm
dtfmtsym.h	38609	0644	edit dl rm
dtintrv.h	3930	0644	edit dl rm
dtitvfmt.h	47634	0644	edit dl rm
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dtrule.h	8888	0644	edit dl rm
edits.h	21237	0644	edit dl rm
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fieldpos.h	8899	0644	edit dl rm
filteredbrk.h	5501	0644	edit dl rm
fmtable.h	25007	0644	edit dl rm
format.h	12802	0644	edit dl rm
formattedvalue.h	9987	0644	edit dl rm
fpositer.h	3109	0644	edit dl rm
gender.h	3408	0644	edit dl rm
gregocal.h	32472	0644	edit dl rm
icudataver.h	1051	0644	edit dl rm
icuplug.h	12166	0644	edit dl rm
idna.h	13000	0644	edit dl rm
listformatter.h	9493	0644	edit dl rm
localebuilder.h	11502	0644	edit dl rm
localematcher.h	25147	0644	edit dl rm
localpointer.h	19829	0644	edit dl rm
locdspnm.h	7292	0644	edit dl rm
locid.h	48821	0644	edit dl rm
measfmt.h	11603	0644	edit dl rm
measunit.h	97563	0644	edit dl rm
measure.h	4423	0644	edit dl rm
messagepattern.h	34521	0644	edit dl rm
msgfmt.h	45168	0644	edit dl rm
normalizer2.h	34851	0644	edit dl rm
normlzr.h	31682	0644	edit dl rm
nounit.h	2754	0644	edit dl rm
numberformatter.h	86276	0644	edit dl rm
numberrangeformatter.h	28617	0644	edit dl rm
numfmt.h	50950	0644	edit dl rm
numsys.h	7500	0644	edit dl rm
parseerr.h	3155	0644	edit dl rm
parsepos.h	5692	0644	edit dl rm
platform.h	28751	0644	edit dl rm
plurfmt.h	25800	0644	edit dl rm
plurrule.h	18780	0644	edit dl rm
ptypes.h	3577	0644	edit dl rm
putil.h	6487	0644	edit dl rm
rbbi.h	27218	0644	edit dl rm
rbnf.h	49899	0644	edit dl rm
rbtz.h	15979	0644	edit dl rm
regex.h	86367	0644	edit dl rm
region.h	9404	0644	edit dl rm
reldatefmt.h	22801	0644	edit dl rm
rep.h	9599	0644	edit dl rm
resbund.h	18503	0644	edit dl rm
schriter.h	6475	0644	edit dl rm
scientificnumberformatter.h	6553	0644	edit dl rm
search.h	22757	0644	edit dl rm
selfmt.h	14643	0644	edit dl rm
simpleformatter.h	12888	0644	edit dl rm
simpletz.h	46527	0644	edit dl rm
smpdtfmt.h	72713	0644	edit dl rm
sortkey.h	11444	0644	edit dl rm
std_string.h	1076	0644	edit dl rm
strenum.h	10158	0644	edit dl rm
stringoptions.h	5926	0644	edit dl rm
stringpiece.h	10597	0644	edit dl rm
stringtriebuilder.h	15698	0644	edit dl rm
stsearch.h	21810	0644	edit dl rm
symtable.h	4374	0644	edit dl rm
tblcoll.h	37489	0644	edit dl rm
timezone.h	42005	0644	edit dl rm
tmunit.h	3461	0644	edit dl rm
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translit.h	67400	0644	edit dl rm
tzfmt.h	43916	0644	edit dl rm
tznames.h	17252	0644	edit dl rm
tzrule.h	36215	0644	edit dl rm
tztrans.h	6271	0644	edit dl rm
ubidi.h	91711	0644	edit dl rm
ubiditransform.h	12950	0644	edit dl rm
ubrk.h	24547	0644	edit dl rm
ucal.h	58265	0644	edit dl rm
ucasemap.h	15546	0644	edit dl rm
ucat.h	5484	0644	edit dl rm
uchar.h	144630	0644	edit dl rm
ucharstrie.h	23120	0644	edit dl rm
ucharstriebuilder.h	7378	0644	edit dl rm
uchriter.h	13521	0644	edit dl rm
uclean.h	11474	0644	edit dl rm
ucnv.h	85085	0644	edit dl rm
ucnvsel.h	6283	0644	edit dl rm
ucnv_cb.h	6748	0644	edit dl rm
ucnv_err.h	21492	0644	edit dl rm
ucol.h	62939	0644	edit dl rm
ucoleitr.h	9684	0644	edit dl rm
uconfig.h	12356	0644	edit dl rm
ucpmap.h	5663	0644	edit dl rm
ucptrie.h	23002	0644	edit dl rm
ucsdet.h	15018	0644	edit dl rm
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udat.h	62851	0644	edit dl rm
udata.h	15930	0644	edit dl rm
udateintervalformat.h	10995	0644	edit dl rm
udatpg.h	27447	0644	edit dl rm
udisplaycontext.h	6029	0644	edit dl rm
uenum.h	7970	0644	edit dl rm
ufieldpositer.h	4461	0644	edit dl rm
uformattable.h	11198	0644	edit dl rm
uformattedvalue.h	12413	0644	edit dl rm
ugender.h	2052	0644	edit dl rm
uidna.h	34169	0644	edit dl rm
uiter.h	23319	0644	edit dl rm
uldnames.h	10702	0644	edit dl rm
ulistformatter.h	11086	0644	edit dl rm
uloc.h	54432	0644	edit dl rm
ulocdata.h	11533	0644	edit dl rm
umachine.h	14884	0644	edit dl rm
umisc.h	1365	0644	edit dl rm
umsg.h	24812	0644	edit dl rm
umutablecptrie.h	8435	0644	edit dl rm
unifilt.h	4055	0644	edit dl rm
unifunct.h	4141	0644	edit dl rm
unimatch.h	6244	0644	edit dl rm
unirepl.h	3464	0644	edit dl rm
uniset.h	66459	0644	edit dl rm
unistr.h	174523	0644	edit dl rm
unorm.h	21015	0644	edit dl rm
unorm2.h	25254	0644	edit dl rm
unum.h	54743	0644	edit dl rm
unumberformatter.h	25824	0644	edit dl rm
unumsys.h	7387	0644	edit dl rm
uobject.h	10936	0644	edit dl rm
upluralrules.h	8013	0644	edit dl rm
uregex.h	73784	0644	edit dl rm
uregion.h	10073	0644	edit dl rm
ureldatefmt.h	17409	0644	edit dl rm
urename.h	134449	0644	edit dl rm
urep.h	5507	0644	edit dl rm
ures.h	37415	0644	edit dl rm
uscript.h	27867	0644	edit dl rm
usearch.h	39039	0644	edit dl rm
uset.h	40958	0644	edit dl rm
usetiter.h	9781	0644	edit dl rm
ushape.h	18432	0644	edit dl rm
uspoof.h	67480	0644	edit dl rm
usprep.h	8331	0644	edit dl rm
ustdio.h	39469	0644	edit dl rm
ustream.h	1934	0644	edit dl rm
ustring.h	74211	0644	edit dl rm
ustringtrie.h	3224	0644	edit dl rm
utext.h	59527	0644	edit dl rm
utf.h	8046	0644	edit dl rm
utf8.h	31700	0644	edit dl rm
utf16.h	23878	0644	edit dl rm
utf32.h	763	0644	edit dl rm
utf_old.h	46929	0644	edit dl rm
utmscale.h	14113	0644	edit dl rm
utrace.h	17706	0644	edit dl rm
utrans.h	26130	0644	edit dl rm
utypes.h	31481	0644	edit dl rm
uvernum.h	6832	0644	edit dl rm
uversion.h	6145	0644	edit dl rm
vtzone.h	20784	0644	edit dl rm

Edit: /usr/include/unicode/search.h (22757B)

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
*   Copyright (C) 2001-2011 IBM and others. All rights reserved.
**********************************************************************
*   Date        Name        Description
*  03/22/2000   helena      Creation.
**********************************************************************
*/

#ifndef SEARCH_H
#define SEARCH_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

/**
 * \file 
 * \brief C++ API: SearchIterator object.
 */
 
#if !UCONFIG_NO_COLLATION && !UCONFIG_NO_BREAK_ITERATION

#include "unicode/uobject.h"
#include "unicode/unistr.h"
#include "unicode/chariter.h"
#include "unicode/brkiter.h"
#include "unicode/usearch.h"

/**
* @stable ICU 2.0
*/
struct USearch;
/**
* @stable ICU 2.0
*/
typedef struct USearch USearch;

U_NAMESPACE_BEGIN

/**
 *
 * <tt>SearchIterator</tt> is an abstract base class that provides 
 * methods to search for a pattern within a text string. Instances of
 * <tt>SearchIterator</tt> maintain a current position and scans over the 
 * target text, returning the indices the pattern is matched and the length 
 * of each match.
 * 
 * <tt>SearchIterator</tt> defines a protocol for text searching. 
 * Subclasses provide concrete implementations of various search algorithms. 
 * For example, <tt>StringSearch</tt> implements language-sensitive pattern 
 * matching based on the comparison rules defined in a 
 * <tt>RuleBasedCollator</tt> object. 
 * 
 * Other options for searching includes using a BreakIterator to restrict 
 * the points at which matches are detected.
 * 
 * <tt>SearchIterator</tt> provides an API that is similar to that of
 * other text iteration classes such as <tt>BreakIterator</tt>. Using 
 * this class, it is easy to scan through text looking for all occurances of 
 * a given pattern. The following example uses a <tt>StringSearch</tt> 
 * object to find all instances of "fox" in the target string. Any other 
 * subclass of <tt>SearchIterator</tt> can be used in an identical 
 * manner.
 * <pre><code>
 * UnicodeString target("The quick brown fox jumped over the lazy fox");
 * UnicodeString pattern("fox");
 *
 * SearchIterator *iter = new StringSearch(pattern, target);
 * UErrorCode error = U_ZERO_ERROR;
 * for (int pos = iter->first(error); pos != USEARCH_DONE; 
 * pos = iter->next(error)) {
 * printf("Found match at %d pos, length is %d\n", pos, iter.getMatchedLength());
 * }
 * </code></pre>
 *
 * @see StringSearch
 * @see RuleBasedCollator
 */
class U_I18N_API SearchIterator : public UObject {

public:

// public constructors and destructors -------------------------------

/** 
    * Copy constructor that creates a SearchIterator instance with the same 
    * behavior, and iterating over the same text. 
    * @param other the SearchIterator instance to be copied.
    * @stable ICU 2.0
    */
    SearchIterator(const SearchIterator &other);

/**
     * Destructor. Cleans up the search iterator data struct.
     * @stable ICU 2.0
     */
    virtual ~SearchIterator();

// public get and set methods ----------------------------------------

/**
 * Sets the index to point to the given position, and clears any state 
 * that's affected.
 * 
 * This method takes the argument index and sets the position in the text 
 * string accordingly without checking if the index is pointing to a 
 * valid starting point to begin searching. 
 * @param position within the text to be set. If position is less
 * than or greater than the text range for searching, 
 * an U_INDEX_OUTOFBOUNDS_ERROR will be returned
 * @param status for errors if it occurs
 * @stable ICU 2.0
 */
 virtual void setOffset(int32_t position, UErrorCode &status) = 0;

/**
     * Return the current index in the text being searched.
     * If the iteration has gone past the end of the text
     * (or past the beginning for a backwards search), USEARCH_DONE
     * is returned.
     * @return current index in the text being searched.
     * @stable ICU 2.0
     */
    virtual int32_t getOffset(void) const = 0;

/**
    * Sets the text searching attributes located in the enum 
    * USearchAttribute with values from the enum USearchAttributeValue.
    * USEARCH_DEFAULT can be used for all attributes for resetting.
    * @param attribute text attribute (enum USearchAttribute) to be set
    * @param value text attribute value
    * @param status for errors if it occurs
    * @stable ICU 2.0
    */
    void setAttribute(USearchAttribute       attribute,
                      USearchAttributeValue  value,
                      UErrorCode            &status);

/** 
 * Gets the text searching attributes
 * @param attribute text attribute (enum USearchAttribute) to be retrieve
 * @return text attribute value
 * @stable ICU 2.0
 */
 USearchAttributeValue getAttribute(USearchAttribute attribute) const;
 
 /**
 * Returns the index to the match in the text string that was searched.
 * This call returns a valid result only after a successful call to 
 * <tt>first</tt>, <tt>next</tt>, <tt>previous</tt>, or <tt>last</tt>.
 * Just after construction, or after a searching method returns 
 * <tt>USEARCH_DONE</tt>, this method will return <tt>USEARCH_DONE</tt>.
 * 
 * Use getMatchedLength to get the matched string length.
 * @return index of a substring within the text string that is being 
 * searched.
 * @see #first
 * @see #next
 * @see #previous
 * @see #last
 * @stable ICU 2.0
 */
 int32_t getMatchedStart(void) const;

/**
 * Returns the length of text in the string which matches the search 
 * pattern. This call returns a valid result only after a successful call 
 * to <tt>first</tt>, <tt>next</tt>, <tt>previous</tt>, or <tt>last</tt>.
 * Just after construction, or after a searching method returns 
 * <tt>USEARCH_DONE</tt>, this method will return 0.
 * @return The length of the match in the target text, or 0 if there
 * is no match currently.
 * @see #first
 * @see #next
 * @see #previous
 * @see #last
 * @stable ICU 2.0
 */
 int32_t getMatchedLength(void) const;
 
 /**
 * Returns the text that was matched by the most recent call to 
 * <tt>first</tt>, <tt>next</tt>, <tt>previous</tt>, or <tt>last</tt>.
 * If the iterator is not pointing at a valid match (e.g. just after 
 * construction or after <tt>USEARCH_DONE</tt> has been returned, 
 * returns an empty string. 
 * @param result stores the matched string or an empty string if a match
 * is not found.
 * @see #first
 * @see #next
 * @see #previous
 * @see #last
 * @stable ICU 2.0
 */
 void getMatchedText(UnicodeString &result) const;
 
 /**
 * Set the BreakIterator that will be used to restrict the points
 * at which matches are detected. The user is responsible for deleting 
 * the breakiterator.
 * @param breakiter A BreakIterator that will be used to restrict the 
 * points at which matches are detected. If a match is 
 * found, but the match's start or end index is not a 
 * boundary as determined by the <tt>BreakIterator</tt>, 
 * the match will be rejected and another will be searched 
 * for. If this parameter is <tt>NULL</tt>, no break
 * detection is attempted.
 * @param status for errors if it occurs
 * @see BreakIterator
 * @stable ICU 2.0
 */
 void setBreakIterator(BreakIterator *breakiter, UErrorCode &status);
 
 /**
 * Returns the BreakIterator that is used to restrict the points at 
 * which matches are detected. This will be the same object that was 
 * passed to the constructor or to <tt>setBreakIterator</tt>.
 * Note that <tt>NULL</tt> is a legal value; it means that break
 * detection should not be attempted.
 * @return BreakIterator used to restrict matchings.
 * @see #setBreakIterator
 * @stable ICU 2.0
 */
 const BreakIterator * getBreakIterator(void) const;

/**
     * Set the string text to be searched. Text iteration will hence begin at 
     * the start of the text string. This method is useful if you want to 
     * re-use an iterator to search for the same pattern within a different 
     * body of text. The user is responsible for deleting the text.
     * @param text string to be searched.
     * @param status for errors. If the text length is 0, 
     *        an U_ILLEGAL_ARGUMENT_ERROR is returned.
     * @stable ICU 2.0
     */
    virtual void setText(const UnicodeString &text, UErrorCode &status);

/**
 * Set the string text to be searched. Text iteration will hence begin at 
 * the start of the text string. This method is useful if you want to 
 * re-use an iterator to search for the same pattern within a different 
 * body of text.
 * 
 * Note: No parsing of the text within the <tt>CharacterIterator</tt> 
 * will be done during searching for this version. The block of text 
 * in <tt>CharacterIterator</tt> will be used as it is.
 * The user is responsible for deleting the text.
 * @param text string iterator to be searched.
 * @param status for errors if any. If the text length is 0 then an 
 * U_ILLEGAL_ARGUMENT_ERROR is returned.
 * @stable ICU 2.0
 */
 virtual void setText(CharacterIterator &text, UErrorCode &status);
 
 /**
 * Return the string text to be searched.
 * @return text string to be searched.
 * @stable ICU 2.0
 */
 const UnicodeString & getText(void) const;

// operator overloading ----------------------------------------------

/**
     * Equality operator. 
     * @param that SearchIterator instance to be compared.
     * @return TRUE if both BreakIterators are of the same class, have the 
     *         same behavior, terates over the same text and have the same
     *         attributes. FALSE otherwise.
     * @stable ICU 2.0
     */
    virtual UBool operator==(const SearchIterator &that) const;

/**
     * Not-equal operator. 
     * @param that SearchIterator instance to be compared.
     * @return FALSE if operator== returns TRUE, and vice versa.
     * @stable ICU 2.0
     */
    UBool operator!=(const SearchIterator &that) const;

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

/**
     * Returns a copy of SearchIterator with the same behavior, and 
     * iterating over the same text, as this one. Note that all data will be
     * replicated, except for the text string to be searched.
     * @return cloned object
     * @stable ICU 2.0
     */
    virtual SearchIterator* safeClone(void) const = 0;

/**
 * Returns the first index at which the string text matches the search 
 * pattern. The iterator is adjusted so that its current index (as 
 * returned by <tt>getOffset</tt>) is the match position if one 
 * was found.
 * If a match is not found, <tt>USEARCH_DONE</tt> will be returned and
 * the iterator will be adjusted to the index USEARCH_DONE
 * @param status for errors if it occurs
 * @return The character index of the first match, or 
 * <tt>USEARCH_DONE</tt> if there are no matches.
 * @see #getOffset
 * @stable ICU 2.0
 */
 int32_t first(UErrorCode &status);

/**
 * Returns the first index equal or greater than <tt>position</tt> at which the 
 * string text matches the search pattern. The iterator is adjusted so 
 * that its current index (as returned by <tt>getOffset</tt>) is the 
 * match position if one was found.
 * If a match is not found, <tt>USEARCH_DONE</tt> will be returned and the
 * iterator will be adjusted to the index <tt>USEARCH_DONE</tt>.
 * @param position where search if to start from. If position is less
 * than or greater than the text range for searching, 
 * an U_INDEX_OUTOFBOUNDS_ERROR will be returned
 * @param status for errors if it occurs
 * @return The character index of the first match following 
 * <tt>position</tt>, or <tt>USEARCH_DONE</tt> if there are no 
 * matches.
 * @see #getOffset
 * @stable ICU 2.0
 */
 int32_t following(int32_t position, UErrorCode &status);
 
 /**
 * Returns the last index in the target text at which it matches the 
 * search pattern. The iterator is adjusted so that its current index 
 * (as returned by <tt>getOffset</tt>) is the match position if one was 
 * found.
 * If a match is not found, <tt>USEARCH_DONE</tt> will be returned and
 * the iterator will be adjusted to the index USEARCH_DONE.
 * @param status for errors if it occurs
 * @return The index of the first match, or <tt>USEARCH_DONE</tt> if 
 * there are no matches.
 * @see #getOffset
 * @stable ICU 2.0
 */
 int32_t last(UErrorCode &status);

/**
 * Returns the first index less than <tt>position</tt> at which the string 
 * text matches the search pattern. The iterator is adjusted so that its 
 * current index (as returned by <tt>getOffset</tt>) is the match 
 * position if one was found. If a match is not found, 
 * <tt>USEARCH_DONE</tt> will be returned and the iterator will be 
 * adjusted to the index USEARCH_DONE
 * 
 * When <tt>USEARCH_OVERLAP</tt> option is off, the last index of the
 * result match is always less than <tt>position</tt>.
 * When <tt>USERARCH_OVERLAP</tt> is on, the result match may span across
 * <tt>position</tt>.
 *
 * @param position where search is to start from. If position is less
 * than or greater than the text range for searching, 
 * an U_INDEX_OUTOFBOUNDS_ERROR will be returned
 * @param status for errors if it occurs
 * @return The character index of the first match preceding 
 * <tt>position</tt>, or <tt>USEARCH_DONE</tt> if there are 
 * no matches.
 * @see #getOffset
 * @stable ICU 2.0
 */
 int32_t preceding(int32_t position, UErrorCode &status);

/**
 * Returns the index of the next point at which the text matches the
 * search pattern, starting from the current position
 * The iterator is adjusted so that its current index (as returned by 
 * <tt>getOffset</tt>) is the match position if one was found.
 * If a match is not found, <tt>USEARCH_DONE</tt> will be returned and
 * the iterator will be adjusted to a position after the end of the text 
 * string.
 * @param status for errors if it occurs
 * @return The index of the next match after the current position,
 * or <tt>USEARCH_DONE</tt> if there are no more matches.
 * @see #getOffset
 * @stable ICU 2.0
 */
 int32_t next(UErrorCode &status);

/**
 * Returns the index of the previous point at which the string text 
 * matches the search pattern, starting at the current position.
 * The iterator is adjusted so that its current index (as returned by 
 * <tt>getOffset</tt>) is the match position if one was found.
 * If a match is not found, <tt>USEARCH_DONE</tt> will be returned and
 * the iterator will be adjusted to the index USEARCH_DONE
 * @param status for errors if it occurs
 * @return The index of the previous match before the current position,
 * or <tt>USEARCH_DONE</tt> if there are no more matches.
 * @see #getOffset
 * @stable ICU 2.0
 */
 int32_t previous(UErrorCode &status);

/** 
    * Resets the iteration.
    * Search will begin at the start of the text string if a forward 
    * iteration is initiated before a backwards iteration. Otherwise if a 
    * backwards iteration is initiated before a forwards iteration, the 
    * search will begin at the end of the text string.    
    * @stable ICU 2.0
    */
    virtual void reset();

protected:
    // protected data members ---------------------------------------------

/**
    * C search data struct
    * @stable ICU 2.0
    */
    USearch *m_search_;

/**
    * Break iterator.
    * Currently the C++ breakiterator does not have getRules etc to reproduce
    * another in C. Hence we keep the original around and do the verification
    * at the end of the match. The user is responsible for deleting this
    * break iterator.
    * @stable ICU 2.0
    */
    BreakIterator *m_breakiterator_;
    
    /**
    * Unicode string version of the search text
    * @stable ICU 2.0
    */
    UnicodeString  m_text_;

// protected constructors and destructors -----------------------------

/**
    * Default constructor.
    * Initializes data to the default values.
    * @stable ICU 2.0
    */
    SearchIterator();

/**
 * Constructor for use by subclasses.
 * @param text The target text to be searched.
 * @param breakiter A {@link BreakIterator} that is used to restrict the 
 * points at which matches are detected. If 
 * <tt>handleNext</tt> or <tt>handlePrev</tt> finds a 
 * match, but the match's start or end index is not a 
 * boundary as determined by the <tt>BreakIterator</tt>, 
 * the match is rejected and <tt>handleNext</tt> or 
 * <tt>handlePrev</tt> is called again. If this parameter 
 * is <tt>NULL</tt>, no break detection is attempted. 
 * @see #handleNext
 * @see #handlePrev
 * @stable ICU 2.0
 */
 SearchIterator(const UnicodeString &text, 
 BreakIterator *breakiter = NULL);

/**
 * Constructor for use by subclasses.
 * 
 * Note: No parsing of the text within the <tt>CharacterIterator</tt> 
 * will be done during searching for this version. The block of text 
 * in <tt>CharacterIterator</tt> will be used as it is.
 * @param text The target text to be searched.
 * @param breakiter A {@link BreakIterator} that is used to restrict the 
 * points at which matches are detected. If 
 * <tt>handleNext</tt> or <tt>handlePrev</tt> finds a 
 * match, but the match's start or end index is not a 
 * boundary as determined by the <tt>BreakIterator</tt>, 
 * the match is rejected and <tt>handleNext</tt> or 
 * <tt>handlePrev</tt> is called again. If this parameter 
 * is <tt>NULL</tt>, no break detection is attempted.
 * @see #handleNext
 * @see #handlePrev
 * @stable ICU 2.0
 */
 SearchIterator(CharacterIterator &text, BreakIterator *breakiter = NULL);

// protected methods --------------------------------------------------

/**
     * Assignment operator. Sets this iterator to have the same behavior,
     * and iterate over the same text, as the one passed in.
     * @param that instance to be copied.
     * @stable ICU 2.0
     */
    SearchIterator & operator=(const SearchIterator &that);

/**
 * Abstract method which subclasses override to provide the mechanism
 * for finding the next match in the target text. This allows different
 * subclasses to provide different search algorithms.
 * 
 * If a match is found, the implementation should return the index at
 * which the match starts and should call 
 * <tt>setMatchLength</tt> with the number of characters 
 * in the target text that make up the match. If no match is found, the 
 * method should return USEARCH_DONE.
 * 
 * @param position The index in the target text at which the search 
 * should start.
 * @param status for error codes if it occurs.
 * @return index at which the match starts, else if match is not found 
 * USEARCH_DONE is returned
 * @see #setMatchLength
 * @stable ICU 2.0
 */
 virtual int32_t handleNext(int32_t position, UErrorCode &status) 
 = 0;

/**
 * Abstract method which subclasses override to provide the mechanism for
 * finding the previous match in the target text. This allows different
 * subclasses to provide different search algorithms.
 * 
 * If a match is found, the implementation should return the index at
 * which the match starts and should call 
 * <tt>setMatchLength</tt> with the number of characters 
 * in the target text that make up the match. If no match is found, the 
 * method should return USEARCH_DONE.
 * 
 * @param position The index in the target text at which the search 
 * should start.
 * @param status for error codes if it occurs.
 * @return index at which the match starts, else if match is not found 
 * USEARCH_DONE is returned
 * @see #setMatchLength
 * @stable ICU 2.0
 */
 virtual int32_t handlePrev(int32_t position, UErrorCode &status) 
 = 0;

/**
 * Sets the length of the currently matched string in the text string to
 * be searched.
 * Subclasses' <tt>handleNext</tt> and <tt>handlePrev</tt>
 * methods should call this when they find a match in the target text.
 * @param length length of the matched text.
 * @see #handleNext
 * @see #handlePrev
 * @stable ICU 2.0
 */
 virtual void setMatchLength(int32_t length);

/**
 * Sets the offset of the currently matched string in the text string to
 * be searched.
 * Subclasses' <tt>handleNext</tt> and <tt>handlePrev</tt>
 * methods should call this when they find a match in the target text.
 * @param position start offset of the matched text.
 * @see #handleNext
 * @see #handlePrev
 * @stable ICU 2.0
 */
 virtual void setMatchStart(int32_t position);

/**
    * sets match not found 
    * @stable ICU 2.0
    */
    void setMatchNotFound();
};

inline UBool SearchIterator::operator!=(const SearchIterator &that) const
{
   return !operator==(that); 
}
U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_COLLATION */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif

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