GIF89a=( õ' 7IAXKgNgYvYx\%wh…hŽth%ˆs%—x¨}9®Œ©€&©‰%¶†(¹–.¹5·œD¹&Çš)ÇŸ5ǘ;Í£*È¡&Õ²)ׯ7×µ<Ñ»4ï°3ø‘HÖ§KͯT÷¨Yÿšqÿ»qÿÔFØ !ù ' !ÿ NETSCAPE2.0 , =( þÀ“pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§gª«ªE¯°¨¬ª±²Œ¹º¹E¾­”´ÂB¶¯ §Åȸ»ÑD¾¿Á•ÄÅ®° ÝH¾ÒLÀÆDÙ«D¶BÝïðÀ¾DÑÑÔTÌÍíH òGö¨A RÎڐ |¥ ٭&ºìE8œ¹kGÔAÞpx­a¶­ã R2XB®åE8I€Õ6Xî:vT)äžþÀq¦è³¥ì仕F~%xñ  4#ZÔ‰O|-4Bs‘X:= QÉ œš lºÒyXJŠGȦ|s hÏíK–3l7·B|¥$'7Jީܪ‰‡àá”Dæn=Pƒ ¤Òëí‰`䌨ljóá¯Éüv>á–Á¼5 ½.69ûϸd«­ºÀûnlv©‹ªîf{¬ÜãPbŸ  l5‘Ž¯pß ´ ˜3aÅùäI«O’ý·‘áÞ‡˜¾Æ‚ÙÏiÇÿ‹Àƒ #öó)pâš Þ½ ‘Ý{ó)vmÞü%D~ 6f s}ŃƒDØW Eþ`‡þ À…L8xá†ç˜{)x`X/> Ì}mø‚–RØ‘*|`D=‚Ø_ ^ð5 !_…'aä“OÚ—7âcð`D”Cx`ÝÂ¥ä‹éY¹—F¼¤¥Š?¡Õ™ n@`} lď’ÄÉ@4>ñd œ à‘vÒxNÃ×™@žd=ˆgsžG±æ ´²æud &p8Qñ)ˆ«lXD©øÜéAžHìySun jª×k*D¤LH] †¦§C™Jä–´Xb~ʪwStŽ6K,°£qÁœ:9ت:¨þªl¨@¡`‚ûÚ ».Û¬¯t‹ÆSÉ[:°=Š‹„‘Nåû”Ìî{¿ÂA ‡Rà›ÀÙ6úë°Ÿð0Ä_ ½;ÃϱîÉì^ÇÛÇ#Ëë¼ôº!±Ä˜íUîÅÇ;0L1óÁµö«p% AÀºU̬ݵ¼á%霼€‡¯Á~`ÏG¯»À× ­²± =4ªnpð3¾¤³¯­ü¾¦îuÙuµÙ®|%2ÊIÿür¦#0·ÔJ``8È@S@5ê¢ ö×Þ^`8EÜ]ý.뜃Âç 7 ú ȉÞj œ½Dç zý¸iþœÑÙûÄë!ˆÞÀl§Ïw‹*DçI€nEX¯¬¼ &A¬Go¼QföõFç°¯;é¦÷îŽêJ°îúôF5¡ÌQ|îúöXªæ»TÁÏyñêï]ê² o óÎC=öõ›ÒÓPB@ D×½œä(>èCÂxŽ`±«Ÿ–JЀ»Û á¤±p+eE0`ëŽ`A Ú/NE€Ø†À9‚@¤à H½7”à‡%B‰`Àl*ƒó‘–‡8 2ñ%¸ —€:Ù1Á‰E¸àux%nP1ð!‘ðC)¾P81lÑɸF#ˆ€{´âé°ÈB„0>±û °b¡Š´±O‚3È–Ù()yRpbµ¨E.Z‘D8ÊH@% òŒx+%Ù˜Æcü »¸˜fõ¬b·d`Fê™8èXH"ÉÈ-±|1Ô6iI, 2““¬$+](A*jÐ QTÂo‰.ÛU슬Œã„Ž`¯SN¡–¶Äåyše¯ª’­¬‚´b¦Éož œ)åyâ@Ì®3 ÎtT̉°&Ø+žLÀf"Ø-|žçÔ>‡Ðv¦Ðžì\‚ Q1)Ž@Žh#aP72”ˆ™¨$‚ !ù " , =( …7IAXG]KgNgYvYxR"k\%w]'}hŽth%ˆg+ˆs%—r.—m3šx3˜x¨}9®€&©€+¨‡7§‰%¶†(¹–.¹œD¹&ǘ;Í•&ײ)×»4ïÌ6ò§KÍ þ@‘pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§g «¬ E ±± ¨­¶°ººE Á´”·®C¬²§Ç¶Œ»ÓDÃÕƷ¯Ê±H½ºM×ÁGÚ¬D¶BËÁ½î½DÓôTÏÛßîG»ôõC×CÌ l&âž:'òtU³6ɹ#·Ø)€'Ü.6±&ëÍÈ» K(8p0N?!æ2"ÛˆNIJX>R¼ÐO‚M '¡¨2¸*Ÿþ>#n↠å@‚<[:¡Iïf’ ¤TÚ˘CdbÜÙ“[«ŽEú5MBo¤×@€`@„€Êt W-3 ¶Ÿ¡BíêäjIÝ…Eò9[T…$íêﯧ„…•s»Óȳ¹€ÅÚdc®UUρ#±Ùïldj?´í¼²`\ŽÁðÞu|3'ÖŒ]ë6 ¶S#²‡˜FKLÈ *N E´‘áäŠ$˜›eÄYD„ºq«.è촁ƒs \-ÔjA 9²õ÷å- üúM[Âx(ís÷ì®x€|í¡Ù’p¦‚ ŽkÛTÇDpE@WÜ ²Ç]kŠ1¨ þ€·Yb ÓÁ‰l°*n0 ç™—žzBdОu¾7ĉBl€â‰-ºx~|UåU‰  h*Hœ|e"#"?vpÄiŠe6^ˆ„+qâŠm8 #VÇá ‘å–ÄV„œ|Šè•m"сœn|@›U¶ÆΞ—Špb¥G¨ED”€±Úê2FÌIç? >Éxå Œ± ¡¤„%‘žjŸ‘ꄯ<Ìaà9ijÐ2˜D¦È&›†Z`‚å]wþ¼Â:ç6àB¤7eFJ|õÒ§Õ,¨äàFÇ®cS·Ê¶+B°,‘Þ˜ºNûãØ>PADÌHD¹æž«ÄÀnÌ¥}­#Ë’ë QÀÉSÌÂÇ2ÌXÀ{æk²lQÁ2«ÊðÀ¯w|2Í h‹ÄÂG€,m¾¶ë3ÐÙ6-´ÅE¬L°ÆIij*K½ÀÇqï`DwVÍQXœÚÔpeœ±¬Ñ q˜§Tœ½µƒ°Œìu Â<¶aØ*At¯lmEØ ü ôÛN[P1ÔÛ¦­±$ÜÆ@`ùåDpy¶yXvCAyåB`ŽD¶ 0QwG#¯ æš[^Äþ $ÀÓÝǦ{„L™[±úKÄgÌ;ï£S~¹ìGX.ôgoT.»åˆ°ùŸûù¡?1zö¦Ÿž:ÅgÁ|ìL¹ „®£œŠ‚à0œ]PÁ^p F<"•ç?!,ñ‡N4—…PÄ Á„ö¨Û:Tè@hÀ‹%táÿ:ø-žI<`þ‹p I….)^ 40D#p@ƒj4–؀:²‰1Øâr˜¼F2oW¼#Z†;$Q q” ‘ ÂK¦ñNl#29 !’F@¥Bh·ᏀL!—XFóLH‘Kh¤.«hE&JòG¨¥<™WN!€ÑÙÚˆY„@†>Œž19J" 2,/ &.GXB%ÌRÈ9B6¹W]’î×ÔW¥’IÎ$ ñ‹ÓŒE8YÆ ¼³™ñA5“à®Q.aŸB€&Ø©³ JÁ—! ¦t)K%tœ-¦JF bòNMxLôþ)ÐR¸Ð™‘ èÝ6‘O!THÌ„HÛ ‰ !ù ) , =( …AXKgNgYvYxR"k\%wh…hŽh%ˆg+ˆs%—r.—x3˜x¨}9®€&©€+¨Œ,©‡7§‰%¶†(¹–.¹5·&Çš)ǘ;Í•&×£*Ȳ)ׯ7×»4ï°3øÌ6ò‘HÖ§KÍ»Hó¯T÷¨Yÿ»qÿÇhÿ þÀ”pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§g ª« E$±²¨ª­ · °²½$E$ÂÕ««D· Í ¿¦Ç¶¸ÌŒ¾³CÃÅÆ E ééH½MÛÂGâªD­ çBêêϾD²ÒaÀà€Š1r­ðÓ¤ ÔožzU!L˜C'¾yW½UGtäÇïÙllê0×àÂuGþ)AÀs[þ·xì ÁxO%ƒûX2ó—  P£n›R/¡ÑšHše+êDm?# —‘Ç£6¡8íJ¡ŸâDiäªM¥Ö„ôj“¬¹£5oQ7°- <‡ *´lãÓŒ2r/a!l)dÈ A™ÈE¢ôÔ͆…ð ;Ö˜c ¡%ß‚’Ùˆâ¸b½—pe~C"BíëÚHïeF2§æŠ8qb t_`urŠeü wÅu3êæPv§h•"ß`íÍxçLĹÜÖ3á  ~Öº“®›¸ÏMDfJÙ °„ÛµáWõ%§œ‚à©–‚X Ó؁)@®Ñ›Eþ´wëuÅSxb8y\mÖzœ¥§ZbºE—ÂLªÌw!y(>¡™wú=Ç|ÅÝs¢d €CÁW)HÜcC$€L Ä7„r.á\{)@ð` @ äXÈ$PD” `šaG:§æˆOˆ72EÐamn]ù"ŒcÊxÑŒ° &dR8`g«iÙŸLR!¦P …d’ä¡“¦ðÎTƒ¦ià|À _ ¥ Qi#¦Šg›Æ ›noMµ ›V ã£)p ç£ÎW…š=Âeªk§†j„ ´®1ß²sÉxéW«jšl|0¯B0Û, \jÛ´›6±¬¶C ÛíWþï|ëÙ‹¸ñzĸV {ì;Ýñn¼òVˆm³I¼³.Ðã¤PN¥ ²µ¼„µCã+¹ÍByî£Ñ¾HŸ›ëê 7ìYÆFTk¨SaoaY$Dµœìï¿Ã29RÈkt Çïfñ ÇÒ:ÀÐSp¹3ÇI¨â¥DZÄ ü9Ïýögñ½­uÔ*3)O‘˜Ö[_hv ,àî×Et Ÿé¶BH€ Õ[ü±64M@ÔSÌM7dÐl5-ÄÙU܍´©zߌ3Ô€3ž„ „ ¶ÛPô½5×g› êÚ˜kN„Ý…0Îj4€Ìë°“#{þÕ3S2çKÜ'ợlø¼Ú2K{° {Û¶?žm𸧠ËI¼nEò='êüóºè^üæÃ_Û=°óž‚ì#Oý¿Í'¡½áo..ÏYìnüñCœO±Áa¿¢Kô½o,üÄËbö²çºíï{ËC Ú— "”Ï{ËK ÍÒw„õ±Oz dÕ¨à:$ ƒô—«v»] A#ð «€¿šéz)Rx׿ˆ¥‚d``èw-îyÏf×K!ð€þ­Ð|ìPľ„=Ì`ý(f” 'Pa ¥ÐBJa%Ðâf§„%Š¡}FàáÝ×6>ÉäŠG"éŽè=ø!oŠ°^FP¼Ø©Q„ÀCÙÁ`(Ž\ÄÝ® ©Â$<n@dÄ E#ììUÒI! ‚#lù‹`k¦ÐÇ'Rró’ZýNBÈMF Í[¤+‹ðɈ-áwj¨¥þ8¾rá ,VÂh„"|½œ=×G_¦Ñ™EØ 0i*%̲˜Æda0mV‚k¾)›;„&6 p>ÓjK “¦Ç# âDÂ:ûc?:R Ó¬fÞéI-Ì“•Ã<ä=™Ï7˜3œ¨˜c2ŒW ,ˆ”8(T™P‰F¡Jhç"‚ ; 403WebShell
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Current File : /opt/alt/libicu/usr/include/unicode/casemap.h
// © 2017 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

// casemap.h
// created: 2017jan12 Markus W. Scherer

#ifndef __CASEMAP_H__
#define __CASEMAP_H__

#include "unicode/utypes.h"
#include "unicode/stringpiece.h"
#include "unicode/uobject.h"

/**
 * \file
 * \brief C++ API: Low-level C++ case mapping functions.
 */

U_NAMESPACE_BEGIN

class BreakIterator;
class ByteSink;
class Edits;

/**
 * Low-level C++ case mapping functions.
 *
 * @stable ICU 59
 */
class U_COMMON_API CaseMap U_FINAL : public UMemory {
public:
    /**
     * Lowercases a UTF-16 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     * The source string and the destination buffer must not overlap.
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
     * @param src       The original string.
     * @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
     * @param dest      A buffer for the result string. The result will be NUL-terminated if
     *                  the buffer is large enough.
     *                  The contents is undefined in case of failure.
     * @param destCapacity The size of the buffer (number of char16_ts). If it is 0, then
     *                  dest may be NULL and the function will only return the length of the result
     *                  without writing any of the result string.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     * @return The length of the result string, if successful.
     *         When the result would be longer than destCapacity,
     *         the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
     *
     * @see u_strToLower
     * @stable ICU 59
     */
     static int32_t toLower(
            const char *locale, uint32_t options,
            const char16_t *src, int32_t srcLength,
            char16_t *dest, int32_t destCapacity, Edits *edits,
            UErrorCode &errorCode);

    /**
     * Uppercases a UTF-16 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     * The source string and the destination buffer must not overlap.
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
     * @param src       The original string.
     * @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
     * @param dest      A buffer for the result string. The result will be NUL-terminated if
     *                  the buffer is large enough.
     *                  The contents is undefined in case of failure.
     * @param destCapacity The size of the buffer (number of char16_ts). If it is 0, then
     *                  dest may be NULL and the function will only return the length of the result
     *                  without writing any of the result string.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     * @return The length of the result string, if successful.
     *         When the result would be longer than destCapacity,
     *         the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
     *
     * @see u_strToUpper
     * @stable ICU 59
     */
    static int32_t toUpper(
            const char *locale, uint32_t options,
            const char16_t *src, int32_t srcLength,
            char16_t *dest, int32_t destCapacity, Edits *edits,
            UErrorCode &errorCode);

#if !UCONFIG_NO_BREAK_ITERATION

    /**
     * Titlecases a UTF-16 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     * The source string and the destination buffer must not overlap.
     *
     * Titlecasing uses a break iterator to find the first characters of words
     * that are to be titlecased. It titlecases those characters and lowercases
     * all others. (This can be modified with options bits.)
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
     *                  U_TITLECASE_NO_LOWERCASE,
     *                  U_TITLECASE_NO_BREAK_ADJUSTMENT, U_TITLECASE_ADJUST_TO_CASED,
     *                  U_TITLECASE_WHOLE_STRING, U_TITLECASE_SENTENCES.
     * @param iter      A break iterator to find the first characters of words that are to be titlecased.
     *                  It is set to the source string (setText())
     *                  and used one or more times for iteration (first() and next()).
     *                  If NULL, then a word break iterator for the locale is used
     *                  (or something equivalent).
     * @param src       The original string.
     * @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
     * @param dest      A buffer for the result string. The result will be NUL-terminated if
     *                  the buffer is large enough.
     *                  The contents is undefined in case of failure.
     * @param destCapacity The size of the buffer (number of char16_ts). If it is 0, then
     *                  dest may be NULL and the function will only return the length of the result
     *                  without writing any of the result string.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     * @return The length of the result string, if successful.
     *         When the result would be longer than destCapacity,
     *         the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
     *
     * @see u_strToTitle
     * @see ucasemap_toTitle
     * @stable ICU 59
     */
    static int32_t toTitle(
            const char *locale, uint32_t options, BreakIterator *iter,
            const char16_t *src, int32_t srcLength,
            char16_t *dest, int32_t destCapacity, Edits *edits,
            UErrorCode &errorCode);

#endif  // UCONFIG_NO_BREAK_ITERATION

    /**
     * Case-folds a UTF-16 string and optionally records edits.
     *
     * Case folding is locale-independent and not context-sensitive,
     * but there is an option for whether to include or exclude mappings for dotted I
     * and dotless i that are marked with 'T' in CaseFolding.txt.
     *
     * The result may be longer or shorter than the original.
     * The source string and the destination buffer must not overlap.
     *
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
     *                  U_FOLD_CASE_DEFAULT, U_FOLD_CASE_EXCLUDE_SPECIAL_I.
     * @param src       The original string.
     * @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
     * @param dest      A buffer for the result string. The result will be NUL-terminated if
     *                  the buffer is large enough.
     *                  The contents is undefined in case of failure.
     * @param destCapacity The size of the buffer (number of char16_ts). If it is 0, then
     *                  dest may be NULL and the function will only return the length of the result
     *                  without writing any of the result string.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     * @return The length of the result string, if successful.
     *         When the result would be longer than destCapacity,
     *         the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
     *
     * @see u_strFoldCase
     * @stable ICU 59
     */
    static int32_t fold(
            uint32_t options,
            const char16_t *src, int32_t srcLength,
            char16_t *dest, int32_t destCapacity, Edits *edits,
            UErrorCode &errorCode);

    /**
     * Lowercases a UTF-8 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
     * @param src       The original string.
     * @param sink      A ByteSink to which the result string is written.
     *                  sink.Flush() is called at the end.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     *
     * @see ucasemap_utf8ToLower
     * @stable ICU 60
     */
    static void utf8ToLower(
            const char *locale, uint32_t options,
            StringPiece src, ByteSink &sink, Edits *edits,
            UErrorCode &errorCode);

    /**
     * Uppercases a UTF-8 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
     * @param src       The original string.
     * @param sink      A ByteSink to which the result string is written.
     *                  sink.Flush() is called at the end.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     *
     * @see ucasemap_utf8ToUpper
     * @stable ICU 60
     */
    static void utf8ToUpper(
            const char *locale, uint32_t options,
            StringPiece src, ByteSink &sink, Edits *edits,
            UErrorCode &errorCode);

#if !UCONFIG_NO_BREAK_ITERATION

    /**
     * Titlecases a UTF-8 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     *
     * Titlecasing uses a break iterator to find the first characters of words
     * that are to be titlecased. It titlecases those characters and lowercases
     * all others. (This can be modified with options bits.)
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
     *                  U_TITLECASE_NO_LOWERCASE,
     *                  U_TITLECASE_NO_BREAK_ADJUSTMENT, U_TITLECASE_ADJUST_TO_CASED,
     *                  U_TITLECASE_WHOLE_STRING, U_TITLECASE_SENTENCES.
     * @param iter      A break iterator to find the first characters of words that are to be titlecased.
     *                  It is set to the source string (setUText())
     *                  and used one or more times for iteration (first() and next()).
     *                  If NULL, then a word break iterator for the locale is used
     *                  (or something equivalent).
     * @param src       The original string.
     * @param sink      A ByteSink to which the result string is written.
     *                  sink.Flush() is called at the end.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     *
     * @see ucasemap_utf8ToTitle
     * @stable ICU 60
     */
    static void utf8ToTitle(
            const char *locale, uint32_t options, BreakIterator *iter,
            StringPiece src, ByteSink &sink, Edits *edits,
            UErrorCode &errorCode);

#endif  // UCONFIG_NO_BREAK_ITERATION

    /**
     * Case-folds a UTF-8 string and optionally records edits.
     *
     * Case folding is locale-independent and not context-sensitive,
     * but there is an option for whether to include or exclude mappings for dotted I
     * and dotless i that are marked with 'T' in CaseFolding.txt.
     *
     * The result may be longer or shorter than the original.
     *
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
     * @param src       The original string.
     * @param sink      A ByteSink to which the result string is written.
     *                  sink.Flush() is called at the end.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     *
     * @see ucasemap_utf8FoldCase
     * @stable ICU 60
     */
    static void utf8Fold(
            uint32_t options,
            StringPiece src, ByteSink &sink, Edits *edits,
            UErrorCode &errorCode);

    /**
     * Lowercases a UTF-8 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     * The source string and the destination buffer must not overlap.
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
     * @param src       The original string.
     * @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
     * @param dest      A buffer for the result string. The result will be NUL-terminated if
     *                  the buffer is large enough.
     *                  The contents is undefined in case of failure.
     * @param destCapacity The size of the buffer (number of bytes). If it is 0, then
     *                  dest may be NULL and the function will only return the length of the result
     *                  without writing any of the result string.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     * @return The length of the result string, if successful.
     *         When the result would be longer than destCapacity,
     *         the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
     *
     * @see ucasemap_utf8ToLower
     * @stable ICU 59
     */
    static int32_t utf8ToLower(
            const char *locale, uint32_t options,
            const char *src, int32_t srcLength,
            char *dest, int32_t destCapacity, Edits *edits,
            UErrorCode &errorCode);

    /**
     * Uppercases a UTF-8 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     * The source string and the destination buffer must not overlap.
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
     * @param src       The original string.
     * @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
     * @param dest      A buffer for the result string. The result will be NUL-terminated if
     *                  the buffer is large enough.
     *                  The contents is undefined in case of failure.
     * @param destCapacity The size of the buffer (number of bytes). If it is 0, then
     *                  dest may be NULL and the function will only return the length of the result
     *                  without writing any of the result string.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     * @return The length of the result string, if successful.
     *         When the result would be longer than destCapacity,
     *         the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
     *
     * @see ucasemap_utf8ToUpper
     * @stable ICU 59
     */
    static int32_t utf8ToUpper(
            const char *locale, uint32_t options,
            const char *src, int32_t srcLength,
            char *dest, int32_t destCapacity, Edits *edits,
            UErrorCode &errorCode);

#if !UCONFIG_NO_BREAK_ITERATION

    /**
     * Titlecases a UTF-8 string and optionally records edits.
     * Casing is locale-dependent and context-sensitive.
     * The result may be longer or shorter than the original.
     * The source string and the destination buffer must not overlap.
     *
     * Titlecasing uses a break iterator to find the first characters of words
     * that are to be titlecased. It titlecases those characters and lowercases
     * all others. (This can be modified with options bits.)
     *
     * @param locale    The locale ID. ("" = root locale, NULL = default locale.)
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
     *                  U_TITLECASE_NO_LOWERCASE,
     *                  U_TITLECASE_NO_BREAK_ADJUSTMENT, U_TITLECASE_ADJUST_TO_CASED,
     *                  U_TITLECASE_WHOLE_STRING, U_TITLECASE_SENTENCES.
     * @param iter      A break iterator to find the first characters of words that are to be titlecased.
     *                  It is set to the source string (setUText())
     *                  and used one or more times for iteration (first() and next()).
     *                  If NULL, then a word break iterator for the locale is used
     *                  (or something equivalent).
     * @param src       The original string.
     * @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
     * @param dest      A buffer for the result string. The result will be NUL-terminated if
     *                  the buffer is large enough.
     *                  The contents is undefined in case of failure.
     * @param destCapacity The size of the buffer (number of bytes). If it is 0, then
     *                  dest may be NULL and the function will only return the length of the result
     *                  without writing any of the result string.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     * @return The length of the result string, if successful.
     *         When the result would be longer than destCapacity,
     *         the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
     *
     * @see ucasemap_utf8ToTitle
     * @stable ICU 59
     */
    static int32_t utf8ToTitle(
            const char *locale, uint32_t options, BreakIterator *iter,
            const char *src, int32_t srcLength,
            char *dest, int32_t destCapacity, Edits *edits,
            UErrorCode &errorCode);

#endif  // UCONFIG_NO_BREAK_ITERATION

    /**
     * Case-folds a UTF-8 string and optionally records edits.
     *
     * Case folding is locale-independent and not context-sensitive,
     * but there is an option for whether to include or exclude mappings for dotted I
     * and dotless i that are marked with 'T' in CaseFolding.txt.
     *
     * The result may be longer or shorter than the original.
     * The source string and the destination buffer must not overlap.
     *
     * @param options   Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
     *                  U_FOLD_CASE_DEFAULT, U_FOLD_CASE_EXCLUDE_SPECIAL_I.
     * @param src       The original string.
     * @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
     * @param dest      A buffer for the result string. The result will be NUL-terminated if
     *                  the buffer is large enough.
     *                  The contents is undefined in case of failure.
     * @param destCapacity The size of the buffer (number of bytes). If it is 0, then
     *                  dest may be NULL and the function will only return the length of the result
     *                  without writing any of the result string.
     * @param edits     Records edits for index mapping, working with styled text,
     *                  and getting only changes (if any).
     *                  The Edits contents is undefined if any error occurs.
     *                  This function calls edits->reset() first unless
     *                  options includes U_EDITS_NO_RESET. edits can be NULL.
     * @param errorCode Reference to an in/out error code value
     *                  which must not indicate a failure before the function call.
     * @return The length of the result string, if successful.
     *         When the result would be longer than destCapacity,
     *         the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
     *
     * @see ucasemap_utf8FoldCase
     * @stable ICU 59
     */
    static int32_t utf8Fold(
            uint32_t options,
            const char *src, int32_t srcLength,
            char *dest, int32_t destCapacity, Edits *edits,
            UErrorCode &errorCode);

private:
    CaseMap() = delete;
    CaseMap(const CaseMap &other) = delete;
    CaseMap &operator=(const CaseMap &other) = delete;
};

U_NAMESPACE_END

#endif  // __CASEMAP_H__

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