FM / unicode

/usr/include/unicode

Name	Size	Mode	Actions
alphaindex.h	27158	0644	edit dl rm
appendable.h	8739	0644	edit dl rm
basictz.h	10163	0644	edit dl rm
brkiter.h	28478	0644	edit dl rm
bytestream.h	11013	0644	edit dl rm
bytestrie.h	21268	0644	edit dl rm
bytestriebuilder.h	7640	0644	edit dl rm
calendar.h	108424	0644	edit dl rm
caniter.h	7621	0644	edit dl rm
casemap.h	25933	0644	edit dl rm
char16ptr.h	7393	0644	edit dl rm
chariter.h	24638	0644	edit dl rm
choicfmt.h	24544	0644	edit dl rm
coleitr.h	14102	0644	edit dl rm
coll.h	57615	0644	edit dl rm
compactdecimalformat.h	7047	0644	edit dl rm
curramt.h	3869	0644	edit dl rm
currpinf.h	7479	0644	edit dl rm
currunit.h	4112	0644	edit dl rm
datefmt.h	41690	0644	edit dl rm
dbbi.h	1223	0644	edit dl rm
dcfmtsym.h	21101	0644	edit dl rm
decimfmt.h	89676	0644	edit dl rm
docmain.h	7380	0644	edit dl rm
dtfmtsym.h	39126	0644	edit dl rm
dtintrv.h	3935	0644	edit dl rm
dtitvfmt.h	50448	0644	edit dl rm
dtitvinf.h	19072	0644	edit dl rm
dtptngen.h	26692	0644	edit dl rm
dtrule.h	8898	0644	edit dl rm
edits.h	21237	0644	edit dl rm
enumset.h	2130	0644	edit dl rm
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fieldpos.h	8906	0644	edit dl rm
filteredbrk.h	5501	0644	edit dl rm
fmtable.h	25020	0644	edit dl rm
format.h	12802	0644	edit dl rm
formattedvalue.h	9987	0644	edit dl rm
fpositer.h	3107	0644	edit dl rm
gender.h	3408	0644	edit dl rm
gregocal.h	32642	0644	edit dl rm
icudataver.h	1049	0644	edit dl rm
icuplug.h	12109	0644	edit dl rm
idna.h	13000	0644	edit dl rm
listformatter.h	9004	0644	edit dl rm
localebuilder.h	11350	0644	edit dl rm
localematcher.h	27467	0644	edit dl rm
localpointer.h	19825	0644	edit dl rm
locdspnm.h	7292	0644	edit dl rm
locid.h	48804	0644	edit dl rm
measfmt.h	11690	0644	edit dl rm
measunit.h	107613	0644	edit dl rm
measure.h	4431	0644	edit dl rm
messagepattern.h	34517	0644	edit dl rm
msgfmt.h	45278	0644	edit dl rm
normalizer2.h	34466	0644	edit dl rm
normlzr.h	31690	0644	edit dl rm
nounit.h	2305	0644	edit dl rm
numberformatter.h	94505	0644	edit dl rm
numberrangeformatter.h	25790	0644	edit dl rm
numfmt.h	51034	0644	edit dl rm
numsys.h	7509	0644	edit dl rm
parseerr.h	3155	0644	edit dl rm
parsepos.h	5699	0644	edit dl rm
platform.h	28768	0644	edit dl rm
plurfmt.h	25847	0644	edit dl rm
plurrule.h	21316	0644	edit dl rm
ptypes.h	3577	0644	edit dl rm
putil.h	6471	0644	edit dl rm
rbbi.h	28413	0644	edit dl rm
rbnf.h	50021	0644	edit dl rm
rbtz.h	16210	0644	edit dl rm
regex.h	86385	0644	edit dl rm
region.h	9402	0644	edit dl rm
reldatefmt.h	22751	0644	edit dl rm
rep.h	9599	0644	edit dl rm
resbund.h	18513	0644	edit dl rm
schriter.h	6511	0644	edit dl rm
scientificnumberformatter.h	6589	0644	edit dl rm
search.h	22755	0644	edit dl rm
selfmt.h	14686	0644	edit dl rm
simpleformatter.h	12888	0644	edit dl rm
simpletz.h	46798	0644	edit dl rm
smpdtfmt.h	72778	0644	edit dl rm
sortkey.h	11452	0644	edit dl rm
std_string.h	1076	0644	edit dl rm
strenum.h	10157	0644	edit dl rm
stringoptions.h	5926	0644	edit dl rm
stringpiece.h	10287	0644	edit dl rm
stringtriebuilder.h	15842	0644	edit dl rm
stsearch.h	21926	0644	edit dl rm
symtable.h	4374	0644	edit dl rm
tblcoll.h	37801	0644	edit dl rm
timezone.h	44858	0644	edit dl rm
tmunit.h	3479	0644	edit dl rm
tmutamt.h	5029	0644	edit dl rm
tmutfmt.h	7602	0644	edit dl rm
translit.h	67397	0644	edit dl rm
tzfmt.h	43961	0644	edit dl rm
tznames.h	17251	0644	edit dl rm
tzrule.h	36450	0644	edit dl rm
tztrans.h	6278	0644	edit dl rm
ubidi.h	91759	0644	edit dl rm
ubiditransform.h	13003	0644	edit dl rm
ubrk.h	25043	0644	edit dl rm
ucal.h	62463	0644	edit dl rm
ucasemap.h	15579	0644	edit dl rm
ucat.h	5478	0644	edit dl rm
uchar.h	148111	0644	edit dl rm
ucharstrie.h	23066	0644	edit dl rm
ucharstriebuilder.h	7645	0644	edit dl rm
uchriter.h	13747	0644	edit dl rm
uclean.h	11468	0644	edit dl rm
ucnv.h	85051	0644	edit dl rm
ucnvsel.h	6339	0644	edit dl rm
ucnv_cb.h	6738	0644	edit dl rm
ucnv_err.h	21481	0644	edit dl rm
ucol.h	62987	0644	edit dl rm
ucoleitr.h	10056	0644	edit dl rm
uconfig.h	12356	0644	edit dl rm
ucpmap.h	5663	0644	edit dl rm
ucptrie.h	23044	0644	edit dl rm
ucsdet.h	15043	0644	edit dl rm
ucurr.h	17122	0644	edit dl rm
udat.h	63902	0644	edit dl rm
udata.h	16004	0644	edit dl rm
udateintervalformat.h	12218	0644	edit dl rm
udatpg.h	27405	0644	edit dl rm
udisplaycontext.h	6084	0644	edit dl rm
uenum.h	7981	0644	edit dl rm
ufieldpositer.h	4513	0644	edit dl rm
uformattable.h	11233	0644	edit dl rm
uformattedvalue.h	12600	0644	edit dl rm
ugender.h	2106	0644	edit dl rm
uidna.h	34229	0644	edit dl rm
uiter.h	23299	0644	edit dl rm
uldnames.h	10733	0644	edit dl rm
ulistformatter.h	11043	0644	edit dl rm
uloc.h	55936	0644	edit dl rm
ulocdata.h	11572	0644	edit dl rm
umachine.h	16439	0644	edit dl rm
umisc.h	1365	0644	edit dl rm
umsg.h	24832	0644	edit dl rm
umutablecptrie.h	8490	0644	edit dl rm
unifilt.h	4091	0644	edit dl rm
unifunct.h	4151	0644	edit dl rm
unimatch.h	6244	0644	edit dl rm
unirepl.h	3464	0644	edit dl rm
uniset.h	68108	0644	edit dl rm
unistr.h	174627	0644	edit dl rm
unorm.h	21042	0644	edit dl rm
unorm2.h	25269	0644	edit dl rm
unum.h	56269	0644	edit dl rm
unumberformatter.h	31177	0644	edit dl rm
unumberrangeformatter.h	15737	0644	edit dl rm
unumsys.h	7430	0644	edit dl rm
uobject.h	10934	0644	edit dl rm
upluralrules.h	8997	0644	edit dl rm
uregex.h	73719	0644	edit dl rm
uregion.h	10047	0644	edit dl rm
ureldatefmt.h	17448	0644	edit dl rm
urename.h	137853	0644	edit dl rm
urep.h	5507	0644	edit dl rm
ures.h	37418	0644	edit dl rm
uscript.h	28291	0644	edit dl rm
usearch.h	40153	0644	edit dl rm
uset.h	45503	0644	edit dl rm
usetiter.h	9910	0644	edit dl rm
ushape.h	18430	0644	edit dl rm
uspoof.h	67425	0644	edit dl rm
usprep.h	8382	0644	edit dl rm
ustdio.h	39482	0644	edit dl rm
ustream.h	1934	0644	edit dl rm
ustring.h	74096	0644	edit dl rm
ustringtrie.h	3224	0644	edit dl rm
utext.h	59471	0644	edit dl rm
utf.h	8057	0644	edit dl rm
utf8.h	31572	0644	edit dl rm
utf16.h	23910	0644	edit dl rm
utf32.h	763	0644	edit dl rm
utf_old.h	46929	0644	edit dl rm
utmscale.h	14107	0644	edit dl rm
utrace.h	17595	0644	edit dl rm
utrans.h	26157	0644	edit dl rm
utypes.h	31807	0644	edit dl rm
uvernum.h	6839	0644	edit dl rm
uversion.h	6137	0644	edit dl rm
vtzone.h	21303	0644	edit dl rm

Edit: /usr/include/unicode/usearch.h (40153B)

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
*   Copyright (C) 2001-2011,2014 IBM and others. All rights reserved.
**********************************************************************
*   Date        Name        Description
*  06/28/2001   synwee      Creation.
**********************************************************************
*/
#ifndef USEARCH_H
#define USEARCH_H

#include "unicode/utypes.h"

#if !UCONFIG_NO_COLLATION && !UCONFIG_NO_BREAK_ITERATION

#include "unicode/ucol.h"
#include "unicode/ucoleitr.h"
#include "unicode/ubrk.h"

#if U_SHOW_CPLUSPLUS_API
#include "unicode/localpointer.h"
#endif   // U_SHOW_CPLUSPLUS_API

/**
 * \file
 * \brief C API: StringSearch
 *
 * C APIs for an engine that provides language-sensitive text searching based 
 * on the comparison rules defined in a <code>UCollator</code> data struct,
 * see <code>ucol.h</code>. This ensures that language eccentricity can be 
 * handled, e.g. for the German collator, characters &szlig; and SS will be matched 
 * if case is chosen to be ignored. 
 * See the <a href="https://htmlpreview.github.io/?https://github.com/unicode-org/icu-docs/blob/main/design/collation/ICU_collation_design.htm">
 * "ICU Collation Design Document"</a> for more information.
 * 
 * As of ICU4C 4.0 / ICU4J 53, the implementation uses a linear search. In previous versions,
 * a modified form of the Boyer-Moore searching algorithm was used. For more information
 * on the modified Boyer-Moore algorithm see
 * <a href="http://icu-project.org/docs/papers/efficient_text_searching_in_java.html">
 * "Efficient Text Searching in Java"</a>, published in Java Report 
 * in February, 1999.
 * 
 * There are 2 match options for selection: 
 * Let S' be the sub-string of a text string S between the offsets start and 
 * end <start, end>.
 * 
 * A pattern string P matches a text string S at the offsets <start, end> 
 * if
 * <pre> 
 * option 1. Some canonical equivalent of P matches some canonical equivalent 
 * of S'
 * option 2. P matches S' and if P starts or ends with a combining mark, 
 * there exists no non-ignorable combining mark before or after S' 
 * in S respectively. 
 * </pre>
 * Option 2. will be the default.
 * 
 * This search has APIs similar to that of other text iteration mechanisms 
 * such as the break iterators in <code>ubrk.h</code>. Using these 
 * APIs, it is easy to scan through text looking for all occurrences of 
 * a given pattern. This search iterator allows changing of direction by 
 * calling a <code>reset</code> followed by a <code>next</code> or <code>previous</code>. 
 * Though a direction change can occur without calling <code>reset</code> first, 
 * this operation comes with some speed penalty.
 * Generally, match results in the forward direction will match the result 
 * matches in the backwards direction in the reverse order
 * 
 * <code>usearch.h</code> provides APIs to specify the starting position 
 * within the text string to be searched, e.g. <code>usearch_setOffset</code>,
 * <code>usearch_preceding</code> and <code>usearch_following</code>. Since the 
 * starting position will be set as it is specified, please take note that 
 * there are some dangerous positions which the search may render incorrect 
 * results:
 * <ul>
 * <li> The midst of a substring that requires normalization.
 * <li> If the following match is to be found, the position should not be the
 * second character which requires to be swapped with the preceding 
 * character. Vice versa, if the preceding match is to be found, 
 * position to search from should not be the first character which 
 * requires to be swapped with the next character. E.g certain Thai and
 * Lao characters require swapping.
 * <li> If a following pattern match is to be found, any position within a 
 * contracting sequence except the first will fail. Vice versa if a 
 * preceding pattern match is to be found, a invalid starting point 
 * would be any character within a contracting sequence except the last.
 * </ul>
 * 
 * A breakiterator can be used if only matches at logical breaks are desired.
 * Using a breakiterator will only give you results that exactly matches the
 * boundaries given by the breakiterator. For instance the pattern "e" will
 * not be found in the string "\u00e9" if a character break iterator is used.
 * 
 * Options are provided to handle overlapping matches. 
 * E.g. In English, overlapping matches produces the result 0 and 2 
 * for the pattern "abab" in the text "ababab", where else mutually 
 * exclusive matches only produce the result of 0.
 * 
 * Options are also provided to implement "asymmetric search" as described in
 * <a href="http://www.unicode.org/reports/tr10/#Asymmetric_Search">
 * UTS #10 Unicode Collation Algorithm</a>, specifically the USearchAttribute
 * USEARCH_ELEMENT_COMPARISON and its values.
 * 
 * Though collator attributes will be taken into consideration while 
 * performing matches, there are no APIs here for setting and getting the 
 * attributes. These attributes can be set by getting the collator
 * from <code>usearch_getCollator</code> and using the APIs in <code>ucol.h</code>.
 * Lastly to update String Search to the new collator attributes, 
 * usearch_reset() has to be called.
 * 
 * Restriction: 
 * Currently there are no composite characters that consists of a
 * character with combining class > 0 before a character with combining 
 * class == 0. However, if such a character exists in the future, the 
 * search mechanism does not guarantee the results for option 1.
 * 
 * 
 * Example of use: 
 * <pre><code>
 * char *tgtstr = "The quick brown fox jumped over the lazy fox";
 * char *patstr = "fox";
 * UChar target[64];
 * UChar pattern[16];
 * UErrorCode status = U_ZERO_ERROR;
 * u_uastrcpy(target, tgtstr);
 * u_uastrcpy(pattern, patstr);
 *
 * UStringSearch *search = usearch_open(pattern, -1, target, -1, "en_US", 
 * NULL, &status);
 * if (U_SUCCESS(status)) {
 * for (int pos = usearch_first(search, &status); 
 * pos != USEARCH_DONE; 
 * pos = usearch_next(search, &status))
 * {
 * printf("Found match at %d pos, length is %d\n", pos, 
 * usearch_getMatchedLength(search));
 * }
 * }
 *
 * usearch_close(search);
 * </code></pre>
 * @stable ICU 2.4
 */

/**
* DONE is returned by previous() and next() after all valid matches have 
* been returned, and by first() and last() if there are no matches at all.
* @stable ICU 2.4
*/
#define USEARCH_DONE -1

/**
* Data structure for searching
* @stable ICU 2.4
*/
struct UStringSearch;
/**
* Data structure for searching
* @stable ICU 2.4
*/
typedef struct UStringSearch UStringSearch;

/**
* @stable ICU 2.4
*/
typedef enum {
    /**
     * Option for overlapping matches
     * @stable ICU 2.4
     */
    USEARCH_OVERLAP = 0,
#ifndef U_HIDE_DEPRECATED_API
    /** 
     * Option for canonical matches; option 1 in header documentation.
     * The default value will be USEARCH_OFF.
     * Note: Setting this option to USEARCH_ON currently has no effect on
     * search behavior, and this option is deprecated. Instead, to control
     * canonical match behavior, you must set UCOL_NORMALIZATION_MODE
     * appropriately (to UCOL_OFF or UCOL_ON) in the UCollator used by
     * the UStringSearch object.
     * @see usearch_openFromCollator 
     * @see usearch_getCollator
     * @see usearch_setCollator
     * @see ucol_getAttribute
     * @deprecated ICU 53
     */
    USEARCH_CANONICAL_MATCH = 1,
#endif  /* U_HIDE_DEPRECATED_API */
    /** 
     * Option to control how collation elements are compared.
     * The default value will be USEARCH_STANDARD_ELEMENT_COMPARISON.
     * @stable ICU 4.4
     */
    USEARCH_ELEMENT_COMPARISON = 2,

#ifndef U_HIDE_DEPRECATED_API
    /**
     * One more than the highest normal USearchAttribute value.
     * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
     */
    USEARCH_ATTRIBUTE_COUNT = 3
#endif  /* U_HIDE_DEPRECATED_API */
} USearchAttribute;

/**
* @stable ICU 2.4
*/
typedef enum {
 /** 
 * Default value for any USearchAttribute
 * @stable ICU 2.4
 */
 USEARCH_DEFAULT = -1,
 /**
 * Value for USEARCH_OVERLAP and USEARCH_CANONICAL_MATCH
 * @stable ICU 2.4
 */
 USEARCH_OFF, 
 /**
 * Value for USEARCH_OVERLAP and USEARCH_CANONICAL_MATCH
 * @stable ICU 2.4
 */
 USEARCH_ON,
 /** 
 * Value (default) for USEARCH_ELEMENT_COMPARISON;
 * standard collation element comparison at the specified collator
 * strength.
 * @stable ICU 4.4
 */
 USEARCH_STANDARD_ELEMENT_COMPARISON,
 /** 
 * Value for USEARCH_ELEMENT_COMPARISON;
 * collation element comparison is modified to effectively provide
 * behavior between the specified strength and strength - 1. Collation
 * elements in the pattern that have the base weight for the specified
 * strength are treated as "wildcards" that match an element with any
 * other weight at that collation level in the searched text. For
 * example, with a secondary-strength English collator, a plain 'e' in
 * the pattern will match a plain e or an e with any diacritic in the
 * searched text, but an e with diacritic in the pattern will only
 * match an e with the same diacritic in the searched text.
 *
 * This supports "asymmetric search" as described in
 * <a href="http://www.unicode.org/reports/tr10/#Asymmetric_Search">
 * UTS #10 Unicode Collation Algorithm</a>.
 *
 * @stable ICU 4.4
 */
 USEARCH_PATTERN_BASE_WEIGHT_IS_WILDCARD,
 /** 
 * Value for USEARCH_ELEMENT_COMPARISON.
 * collation element comparison is modified to effectively provide
 * behavior between the specified strength and strength - 1. Collation
 * elements in either the pattern or the searched text that have the
 * base weight for the specified strength are treated as "wildcards"
 * that match an element with any other weight at that collation level.
 * For example, with a secondary-strength English collator, a plain 'e'
 * in the pattern will match a plain e or an e with any diacritic in the
 * searched text, but an e with diacritic in the pattern will only
 * match an e with the same diacritic or a plain e in the searched text.
 *
 * This option is similar to "asymmetric search" as described in
 * [UTS #10 Unicode Collation Algorithm](http://www.unicode.org/reports/tr10/#Asymmetric_Search),
 * but also allows unmarked characters in the searched text to match
 * marked or unmarked versions of that character in the pattern.
 *
 * @stable ICU 4.4
 */
 USEARCH_ANY_BASE_WEIGHT_IS_WILDCARD,

#ifndef U_HIDE_DEPRECATED_API
    /**
     * One more than the highest normal USearchAttributeValue value.
     * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
     */
    USEARCH_ATTRIBUTE_VALUE_COUNT
#endif  /* U_HIDE_DEPRECATED_API */
} USearchAttributeValue;

/* open and close ------------------------------------------------------ */

/**
* Creates a String Search iterator data struct using the argument locale language
* rule set. A collator will be created in the process, which will be owned by
* this String Search and will be deleted in <code>usearch_close</code>.
*
* The UStringSearch retains a pointer to both the pattern and text strings.
* The caller must not modify or delete them while using the UStringSearch.
*
* @param pattern for matching
* @param patternlength length of the pattern, -1 for null-termination
* @param text text string
* @param textlength length of the text string, -1 for null-termination
* @param locale name of locale for the rules to be used
* @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 <code>BreakIterator</code>, the match will 
* be rejected and another will be searched for. 
* If this parameter is <code>NULL</code>, no break detection is 
* attempted.
* @param status for errors if it occurs. If pattern or text is NULL, or if
* patternlength or textlength is 0 then an 
* U_ILLEGAL_ARGUMENT_ERROR is returned.
* @return search iterator data structure, or NULL if there is an error.
* @stable ICU 2.4
*/
U_CAPI UStringSearch * U_EXPORT2 usearch_open(const UChar *pattern,
 int32_t patternlength,
 const UChar *text,
 int32_t textlength,
 const char *locale,
 UBreakIterator *breakiter,
 UErrorCode *status);

/**
* Creates a String Search iterator data struct using the argument collator language
* rule set. Note, user retains the ownership of this collator, thus the
* responsibility of deletion lies with the user.

* NOTE: String Search cannot be instantiated from a collator that has
* collate digits as numbers (CODAN) turned on (UCOL_NUMERIC_COLLATION).
*
* The UStringSearch retains a pointer to both the pattern and text strings.
* The caller must not modify or delete them while using the UStringSearch.
*
* @param pattern for matching
* @param patternlength length of the pattern, -1 for null-termination
* @param text text string
* @param textlength length of the text string, -1 for null-termination
* @param collator used for the language rules
* @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 <code>BreakIterator</code>, the match will
* be rejected and another will be searched for.
* If this parameter is <code>NULL</code>, no break detection is
* attempted.
* @param status for errors if it occurs. If collator, pattern or text is NULL,
* or if patternlength or textlength is 0 then an
* U_ILLEGAL_ARGUMENT_ERROR is returned.
* @return search iterator data structure, or NULL if there is an error.
* @stable ICU 2.4
*/
U_CAPI UStringSearch * U_EXPORT2 usearch_openFromCollator(
 const UChar *pattern,
 int32_t patternlength,
 const UChar *text,
 int32_t textlength,
 const UCollator *collator,
 UBreakIterator *breakiter,
 UErrorCode *status);

/**
 * Destroys and cleans up the String Search iterator data struct.
 * If a collator was created in <code>usearch_open</code>, then it will be destroyed here.
 * @param searchiter The UStringSearch to clean up
 * @stable ICU 2.4
 */
U_CAPI void U_EXPORT2 usearch_close(UStringSearch *searchiter);

#if U_SHOW_CPLUSPLUS_API

U_NAMESPACE_BEGIN

/**
 * \class LocalUStringSearchPointer
 * "Smart pointer" class, closes a UStringSearch via usearch_close().
 * For most methods see the LocalPointerBase base class.
 *
 * @see LocalPointerBase
 * @see LocalPointer
 * @stable ICU 4.4
 */
U_DEFINE_LOCAL_OPEN_POINTER(LocalUStringSearchPointer, UStringSearch, usearch_close);

U_NAMESPACE_END

#endif

/* get and set methods -------------------------------------------------- */

/**
* Sets the current position in the text string which the next search will 
* start from. Clears previous states. 
* 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. 
* Search positions that may render incorrect results are highlighted in the
* header comments
* @param strsrch search iterator data struct
* @param position position to start next search from. If position is less
*          than or greater than the text range for searching, 
*          an U_INDEX_OUTOFBOUNDS_ERROR will be returned
* @param status error status if any.
* @stable ICU 2.4
*/
U_CAPI void U_EXPORT2 usearch_setOffset(UStringSearch *strsrch,
                                        int32_t        position,
                                        UErrorCode    *status);

/**
* Return the current index in the string text being searched.
* If the iteration has gone past the end of the text (or past the beginning 
* for a backwards search), <code>USEARCH_DONE</code> is returned.
* @param strsrch search iterator data struct
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_getOffset(const UStringSearch *strsrch);
 
/**
* Sets the text searching attributes located in the enum USearchAttribute
* with values from the enum USearchAttributeValue.
* <code>USEARCH_DEFAULT</code> can be used for all attributes for resetting.
* @param strsrch search iterator data struct
* @param attribute text attribute to be set
* @param value text attribute value
* @param status for errors if it occurs
* @see #usearch_getAttribute
* @stable ICU 2.4
*/
U_CAPI void U_EXPORT2 usearch_setAttribute(UStringSearch *strsrch,
 USearchAttribute attribute,
 USearchAttributeValue value,
 UErrorCode *status);

/**    
* Gets the text searching attributes.
* @param strsrch search iterator data struct
* @param attribute text attribute to be retrieve
* @return text attribute value
* @see #usearch_setAttribute
* @stable ICU 2.4
*/
U_CAPI USearchAttributeValue U_EXPORT2 usearch_getAttribute(
                                         const UStringSearch    *strsrch,
                                               USearchAttribute  attribute);

/**
* 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 
* <code>usearch_first</code>, <code>usearch_next</code>, <code>usearch_previous</code>, 
* or <code>usearch_last</code>.
* Just after construction, or after a searching method returns 
* <code>USEARCH_DONE</code>, this method will return <code>USEARCH_DONE</code>.
* 
* Use <code>usearch_getMatchedLength</code> to get the matched string length.
* @param strsrch search iterator data struct
* @return index to a substring within the text string that is being 
* searched.
* @see #usearch_first
* @see #usearch_next
* @see #usearch_previous
* @see #usearch_last
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_getMatchedStart(
 const UStringSearch *strsrch);
 
/**
* 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 
* <code>usearch_first</code>, <code>usearch_next</code>, <code>usearch_previous</code>, 
* or <code>usearch_last</code>.
* Just after construction, or after a searching method returns 
* <code>USEARCH_DONE</code>, this method will return 0.
* @param strsrch search iterator data struct
* @return The length of the match in the string text, or 0 if there is no 
* match currently.
* @see #usearch_first
* @see #usearch_next
* @see #usearch_previous
* @see #usearch_last
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_getMatchedLength(
 const UStringSearch *strsrch);

/**
* Returns the text that was matched by the most recent call to 
* <code>usearch_first</code>, <code>usearch_next</code>, <code>usearch_previous</code>, 
* or <code>usearch_last</code>.
* If the iterator is not pointing at a valid match (e.g. just after 
* construction or after <code>USEARCH_DONE</code> has been returned, returns
* an empty string. If result is not large enough to store the matched text,
* result will be filled with the partial text and an U_BUFFER_OVERFLOW_ERROR 
* will be returned in status. result will be null-terminated whenever 
* possible. If the buffer fits the matched text exactly, a null-termination 
* is not possible, then a U_STRING_NOT_TERMINATED_ERROR set in status.
* Pre-flighting can be either done with length = 0 or the API 
* <code>usearch_getMatchedLength</code>.
* @param strsrch search iterator data struct
* @param result UChar buffer to store the matched string
* @param resultCapacity length of the result buffer
* @param status error returned if result is not large enough
* @return exact length of the matched text, not counting the null-termination
* @see #usearch_first
* @see #usearch_next
* @see #usearch_previous
* @see #usearch_last
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_getMatchedText(const UStringSearch *strsrch, 
 UChar *result, 
 int32_t resultCapacity, 
 UErrorCode *status);

#if !UCONFIG_NO_BREAK_ITERATION

/**
* Set the BreakIterator that will be used to restrict the points at which 
* matches are detected.
* @param strsrch search iterator data struct
* @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 <code>BreakIterator</code>, the match will 
* be rejected and another will be searched for. 
* If this parameter is <code>NULL</code>, no break detection is 
* attempted.
* @param status for errors if it occurs
* @see #usearch_getBreakIterator
* @stable ICU 2.4
*/
U_CAPI void U_EXPORT2 usearch_setBreakIterator(UStringSearch *strsrch, 
 UBreakIterator *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 <code>usearch_setBreakIterator</code>. Note that 
* <code>NULL</code> 
* is a legal value; it means that break detection should not be attempted.
* @param strsrch search iterator data struct
* @return break iterator used
* @see #usearch_setBreakIterator
* @stable ICU 2.4
*/
U_CAPI const UBreakIterator * U_EXPORT2 usearch_getBreakIterator(
 const UStringSearch *strsrch);
 
#endif

/**
* 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 UStringSearch retains a pointer to the text string. The caller must not
* modify or delete the string while using the UStringSearch.
*
* @param strsrch search iterator data struct
* @param text new string to look for match
* @param textlength length of the new string, -1 for null-termination
* @param status for errors if it occurs. If text is NULL, or textlength is 0 
*               then an U_ILLEGAL_ARGUMENT_ERROR is returned with no change
*               done to strsrch.
* @see #usearch_getText
* @stable ICU 2.4
*/
U_CAPI void U_EXPORT2 usearch_setText(      UStringSearch *strsrch, 
                                      const UChar         *text,
                                            int32_t        textlength,
                                            UErrorCode    *status);

/**
* Return the string text to be searched.
* @param strsrch search iterator data struct
* @param length returned string text length
* @return string text 
* @see #usearch_setText
* @stable ICU 2.4
*/
U_CAPI const UChar * U_EXPORT2 usearch_getText(const UStringSearch *strsrch, 
                                               int32_t       *length);

/**
* Gets the collator used for the language rules. 
* 
* Deleting the returned <code>UCollator</code> before calling 
* <code>usearch_close</code> would cause the string search to fail.
* <code>usearch_close</code> will delete the collator if this search owns it.
* @param strsrch search iterator data struct
* @return collator
* @stable ICU 2.4
*/
U_CAPI UCollator * U_EXPORT2 usearch_getCollator(
 const UStringSearch *strsrch);

/**
* Sets the collator used for the language rules. User retains the ownership 
* of this collator, thus the responsibility of deletion lies with the user.
* This method causes internal data such as the pattern collation elements
* and shift tables to be recalculated, but the iterator's position is unchanged.
* @param strsrch search iterator data struct
* @param collator to be used
* @param status for errors if it occurs
* @stable ICU 2.4
*/
U_CAPI void U_EXPORT2 usearch_setCollator(      UStringSearch *strsrch, 
                                          const UCollator     *collator,
                                                UErrorCode    *status);

/**
* Sets the pattern used for matching.
* Internal data like the pattern collation elements will be recalculated, but the 
* iterator's position is unchanged.
*
* The UStringSearch retains a pointer to the pattern string. The caller must not
* modify or delete the string while using the UStringSearch.
*
* @param strsrch search iterator data struct
* @param pattern string
* @param patternlength pattern length, -1 for null-terminated string
* @param status for errors if it occurs. If text is NULL, or textlength is 0 
*               then an U_ILLEGAL_ARGUMENT_ERROR is returned with no change
*               done to strsrch.
* @stable ICU 2.4
*/
U_CAPI void U_EXPORT2 usearch_setPattern(      UStringSearch *strsrch, 
                                         const UChar         *pattern,
                                               int32_t        patternlength,
                                               UErrorCode    *status);

/**
* Gets the search pattern
* @param strsrch search iterator data struct
* @param length return length of the pattern, -1 indicates that the pattern 
*               is null-terminated
* @return pattern string
* @stable ICU 2.4
*/
U_CAPI const UChar * U_EXPORT2 usearch_getPattern(
                                               const UStringSearch *strsrch, 
                                                     int32_t       *length);

/* methods ------------------------------------------------------------- */

/**
* 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 
* <code>usearch_getOffset</code>) is the match position if one was found.
* If a match is not found, <code>USEARCH_DONE</code> will be returned and
* the iterator will be adjusted to the index <code>USEARCH_DONE</code>.
* @param strsrch search iterator data struct
* @param status for errors if it occurs
* @return The character index of the first match, or 
* <code>USEARCH_DONE</code> if there are no matches.
* @see #usearch_getOffset
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_first(UStringSearch *strsrch, 
 UErrorCode *status);

/**
* Returns the first index equal or greater than <code>position</code> at which
* the string text
* matches the search pattern. The iterator is adjusted so that its current 
* index (as returned by <code>usearch_getOffset</code>) is the match position if 
* one was found.
* If a match is not found, <code>USEARCH_DONE</code> will be returned and
* the iterator will be adjusted to the index <code>USEARCH_DONE</code>
* 
* Search positions that may render incorrect results are highlighted in the
* header comments. If position is less than or greater than the text range 
* for searching, an U_INDEX_OUTOFBOUNDS_ERROR will be returned
* @param strsrch search iterator data struct
* @param position to start the search at
* @param status for errors if it occurs
* @return The character index of the first match following <code>pos</code>,
* or <code>USEARCH_DONE</code> if there are no matches.
* @see #usearch_getOffset
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_following(UStringSearch *strsrch, 
 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 <code>usearch_getOffset</code>) is the match position if 
* one was found.
* If a match is not found, <code>USEARCH_DONE</code> will be returned and
* the iterator will be adjusted to the index <code>USEARCH_DONE</code>.
* @param strsrch search iterator data struct
* @param status for errors if it occurs
* @return The index of the first match, or <code>USEARCH_DONE</code> if there 
* are no matches.
* @see #usearch_getOffset
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_last(UStringSearch *strsrch, 
 UErrorCode *status);

/**
* Returns the first index less than <code>position</code> at which the string text 
* matches the search pattern. The iterator is adjusted so that its current 
* index (as returned by <code>usearch_getOffset</code>) is the match position if 
* one was found.
* If a match is not found, <code>USEARCH_DONE</code> will be returned and
* the iterator will be adjusted to the index <code>USEARCH_DONE</code>
* 
* Search positions that may render incorrect results are highlighted in the
* header comments. If position is less than or greater than the text range 
* for searching, an U_INDEX_OUTOFBOUNDS_ERROR will be returned.
* 
* When <code>USEARCH_OVERLAP</code> option is off, the last index of the
* result match is always less than <code>position</code>.
* When <code>USERARCH_OVERLAP</code> is on, the result match may span across
* <code>position</code>.
* @param strsrch search iterator data struct
* @param position index position the search is to begin at
* @param status for errors if it occurs
* @return The character index of the first match preceding <code>pos</code>,
* or <code>USEARCH_DONE</code> if there are no matches.
* @see #usearch_getOffset
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_preceding(UStringSearch *strsrch, 
 int32_t position, 
 UErrorCode *status);
 
/**
* Returns the index of the next point at which the string text matches the
* search pattern, starting from the current position.
* The iterator is adjusted so that its current 
* index (as returned by <code>usearch_getOffset</code>) is the match position if 
* one was found.
* If a match is not found, <code>USEARCH_DONE</code> will be returned and
* the iterator will be adjusted to the index <code>USEARCH_DONE</code>
* @param strsrch search iterator data struct
* @param status for errors if it occurs
* @return The index of the next match after the current position, or 
* <code>USEARCH_DONE</code> if there are no more matches.
* @see #usearch_first
* @see #usearch_getOffset
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_next(UStringSearch *strsrch, 
 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 <code>usearch_getOffset</code>) is the match position if 
* one was found.
* If a match is not found, <code>USEARCH_DONE</code> will be returned and
* the iterator will be adjusted to the index <code>USEARCH_DONE</code>
* @param strsrch search iterator data struct
* @param status for errors if it occurs
* @return The index of the previous match before the current position,
* or <code>USEARCH_DONE</code> if there are no more matches.
* @see #usearch_last
* @see #usearch_getOffset
* @see #USEARCH_DONE
* @stable ICU 2.4
*/
U_CAPI int32_t U_EXPORT2 usearch_previous(UStringSearch *strsrch, 
 UErrorCode *status);
 
/** 
* Reset 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.
* @param strsrch search iterator data struct
* @see #usearch_first
* @stable ICU 2.4
*/
U_CAPI void U_EXPORT2 usearch_reset(UStringSearch *strsrch);

#ifndef U_HIDE_INTERNAL_API
/**
  *  Simple forward search for the pattern, starting at a specified index,
  *     and using a default set search options.
  *
  *  This is an experimental function, and is not an official part of the
  *      ICU API.
  *
  *  The collator options, such as UCOL_STRENGTH and UCOL_NORMALIZTION, are honored.
  *
  *  The UStringSearch options USEARCH_CANONICAL_MATCH, USEARCH_OVERLAP and
  *  any Break Iterator are ignored.
  *
  *  Matches obey the following constraints:
  *
  *      Characters at the start or end positions of a match that are ignorable
  *      for collation are not included as part of the match, unless they
  *      are part of a combining sequence, as described below.
  *
  *      A match will not include a partial combining sequence.  Combining
  *      character sequences  are considered to be  inseparable units,
  *      and either match the pattern completely, or are considered to not match
  *      at all.  Thus, for example, an A followed a combining accent mark will 
  *      not be found when searching for a plain (unaccented) A.   (unless
  *      the collation strength has been set to ignore all accents).
  *
  *      When beginning a search, the initial starting position, startIdx,
  *      is assumed to be an acceptable match boundary with respect to
  *      combining characters.  A combining sequence that spans across the
  *      starting point will not suppress a match beginning at startIdx.
  *
  *      Characters that expand to multiple collation elements
  *      (German sharp-S becoming 'ss', or the composed forms of accented
  *      characters, for example) also must match completely.
  *      Searching for a single 's' in a string containing only a sharp-s will 
  *      find no match.
  *
  *
  *  @param strsrch    the UStringSearch struct, which references both
  *                    the text to be searched  and the pattern being sought.
  *  @param startIdx   The index into the text to begin the search.
  *  @param matchStart An out parameter, the starting index of the matched text.
  *                    This parameter may be NULL.
  *                    A value of -1 will be returned if no match was found.
  *  @param matchLimit Out parameter, the index of the first position following the matched text.
  *                    The matchLimit will be at a suitable position for beginning a subsequent search
  *                    in the input text.
  *                    This parameter may be NULL.
  *                    A value of -1 will be returned if no match was found.
  *          
  *  @param status     Report any errors.  Note that no match found is not an error.
  *  @return           true if a match was found, false otherwise.
  *
  *  @internal
  */
U_CAPI UBool U_EXPORT2 usearch_search(UStringSearch *strsrch,
                                          int32_t        startIdx,
                                          int32_t        *matchStart,
                                          int32_t        *matchLimit,
                                          UErrorCode     *status);

/**
  *  Simple backwards search for the pattern, starting at a specified index,
  *     and using using a default set search options.
  *
  *  This is an experimental function, and is not an official part of the
  *      ICU API.
  *
  *  The collator options, such as UCOL_STRENGTH and UCOL_NORMALIZTION, are honored.
  *
  *  The UStringSearch options USEARCH_CANONICAL_MATCH, USEARCH_OVERLAP and
  *  any Break Iterator are ignored.
  *
  *  Matches obey the following constraints:
  *
  *      Characters at the start or end positions of a match that are ignorable
  *      for collation are not included as part of the match, unless they
  *      are part of a combining sequence, as described below.
  *
  *      A match will not include a partial combining sequence.  Combining
  *      character sequences  are considered to be  inseparable units,
  *      and either match the pattern completely, or are considered to not match
  *      at all.  Thus, for example, an A followed a combining accent mark will 
  *      not be found when searching for a plain (unaccented) A.   (unless
  *      the collation strength has been set to ignore all accents).
  *
  *      When beginning a search, the initial starting position, startIdx,
  *      is assumed to be an acceptable match boundary with respect to
  *      combining characters.  A combining sequence that spans across the
  *      starting point will not suppress a match beginning at startIdx.
  *
  *      Characters that expand to multiple collation elements
  *      (German sharp-S becoming 'ss', or the composed forms of accented
  *      characters, for example) also must match completely.
  *      Searching for a single 's' in a string containing only a sharp-s will 
  *      find no match.
  *
  *
  *  @param strsrch    the UStringSearch struct, which references both
  *                    the text to be searched  and the pattern being sought.
  *  @param startIdx   The index into the text to begin the search.
  *  @param matchStart An out parameter, the starting index of the matched text.
  *                    This parameter may be NULL.
  *                    A value of -1 will be returned if no match was found.
  *  @param matchLimit Out parameter, the index of the first position following the matched text.
  *                    The matchLimit will be at a suitable position for beginning a subsequent search
  *                    in the input text.
  *                    This parameter may be NULL.
  *                    A value of -1 will be returned if no match was found.
  *          
  *  @param status     Report any errors.  Note that no match found is not an error.
  *  @return           true if a match was found, false otherwise.
  *
  *  @internal
  */
U_CAPI UBool U_EXPORT2 usearch_searchBackwards(UStringSearch *strsrch,
                                                   int32_t        startIdx,
                                                   int32_t        *matchStart,
                                                   int32_t        *matchLimit,
                                                   UErrorCode     *status);
#endif  /* U_HIDE_INTERNAL_API */

#endif /* #if !UCONFIG_NO_COLLATION  && !UCONFIG_NO_BREAK_ITERATION */

#endif

cmd: