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diff --git a/intl/icu/source/common/ucasemap.cpp b/intl/icu/source/common/ucasemap.cpp
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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+* Copyright (C) 2005-2016, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+*******************************************************************************
+* file name: ucasemap.cpp
+* encoding: UTF-8
+* tab size: 8 (not used)
+* indentation:4
+*
+* created on: 2005may06
+* created by: Markus W. Scherer
+*
+* Case mapping service object and functions using it.
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/brkiter.h"
+#include "unicode/bytestream.h"
+#include "unicode/casemap.h"
+#include "unicode/edits.h"
+#include "unicode/stringoptions.h"
+#include "unicode/stringpiece.h"
+#include "unicode/ubrk.h"
+#include "unicode/uloc.h"
+#include "unicode/ustring.h"
+#include "unicode/ucasemap.h"
+#if !UCONFIG_NO_BREAK_ITERATION
+#include "unicode/utext.h"
+#endif
+#include "unicode/utf.h"
+#include "unicode/utf8.h"
+#include "unicode/utf16.h"
+#include "bytesinkutil.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "uassert.h"
+#include "ucase.h"
+#include "ucasemap_imp.h"
+#include "ustr_imp.h"
+
+U_NAMESPACE_USE
+
+/* UCaseMap service object -------------------------------------------------- */
+
+UCaseMap::UCaseMap(const char *localeID, uint32_t opts, UErrorCode *pErrorCode) :
+#if !UCONFIG_NO_BREAK_ITERATION
+ iter(nullptr),
+#endif
+ caseLocale(UCASE_LOC_UNKNOWN), options(opts) {
+ ucasemap_setLocale(this, localeID, pErrorCode);
+}
+
+UCaseMap::~UCaseMap() {
+#if !UCONFIG_NO_BREAK_ITERATION
+ delete iter;
+#endif
+}
+
+U_CAPI UCaseMap * U_EXPORT2
+ucasemap_open(const char *locale, uint32_t options, UErrorCode *pErrorCode) {
+ if(U_FAILURE(*pErrorCode)) {
+ return nullptr;
+ }
+ UCaseMap *csm = new UCaseMap(locale, options, pErrorCode);
+ if(csm==nullptr) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ return nullptr;
+ } else if (U_FAILURE(*pErrorCode)) {
+ delete csm;
+ return nullptr;
+ }
+ return csm;
+}
+
+U_CAPI void U_EXPORT2
+ucasemap_close(UCaseMap *csm) {
+ delete csm;
+}
+
+U_CAPI const char * U_EXPORT2
+ucasemap_getLocale(const UCaseMap *csm) {
+ return csm->locale;
+}
+
+U_CAPI uint32_t U_EXPORT2
+ucasemap_getOptions(const UCaseMap *csm) {
+ return csm->options;
+}
+
+U_CAPI void U_EXPORT2
+ucasemap_setLocale(UCaseMap *csm, const char *locale, UErrorCode *pErrorCode) {
+ if(U_FAILURE(*pErrorCode)) {
+ return;
+ }
+ if (locale != nullptr && *locale == 0) {
+ csm->locale[0] = 0;
+ csm->caseLocale = UCASE_LOC_ROOT;
+ return;
+ }
+
+ int32_t length=uloc_getName(locale, csm->locale, (int32_t)sizeof(csm->locale), pErrorCode);
+ if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR || length==sizeof(csm->locale)) {
+ *pErrorCode=U_ZERO_ERROR;
+ /* we only really need the language code for case mappings */
+ length=uloc_getLanguage(locale, csm->locale, (int32_t)sizeof(csm->locale), pErrorCode);
+ }
+ if(length==sizeof(csm->locale)) {
+ *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+ }
+ if(U_SUCCESS(*pErrorCode)) {
+ csm->caseLocale = ucase_getCaseLocale(csm->locale);
+ } else {
+ csm->locale[0]=0;
+ csm->caseLocale = UCASE_LOC_ROOT;
+ }
+}
+
+U_CAPI void U_EXPORT2
+ucasemap_setOptions(UCaseMap *csm, uint32_t options, UErrorCode *pErrorCode) {
+ if(U_FAILURE(*pErrorCode)) {
+ return;
+ }
+ csm->options=options;
+}
+
+/* UTF-8 string case mappings ----------------------------------------------- */
+
+/* TODO(markus): Move to a new, separate utf8case.cpp file. */
+
+namespace {
+
+/* append a full case mapping result, see UCASE_MAX_STRING_LENGTH */
+inline UBool
+appendResult(int32_t cpLength, int32_t result, const char16_t *s,
+ ByteSink &sink, uint32_t options, icu::Edits *edits, UErrorCode &errorCode) {
+ U_ASSERT(U_SUCCESS(errorCode));
+
+ /* decode the result */
+ if(result<0) {
+ /* (not) original code point */
+ if(edits!=nullptr) {
+ edits->addUnchanged(cpLength);
+ }
+ if((options & U_OMIT_UNCHANGED_TEXT) == 0) {
+ ByteSinkUtil::appendCodePoint(cpLength, ~result, sink);
+ }
+ } else {
+ if(result<=UCASE_MAX_STRING_LENGTH) {
+ // string: "result" is the UTF-16 length
+ return ByteSinkUtil::appendChange(cpLength, s, result, sink, edits, errorCode);
+ } else {
+ ByteSinkUtil::appendCodePoint(cpLength, result, sink, edits);
+ }
+ }
+ return true;
+}
+
+// See unicode/utf8.h U8_APPEND_UNSAFE().
+inline uint8_t getTwoByteLead(UChar32 c) { return (uint8_t)((c >> 6) | 0xc0); }
+inline uint8_t getTwoByteTrail(UChar32 c) { return (uint8_t)((c & 0x3f) | 0x80); }
+
+UChar32 U_CALLCONV
+utf8_caseContextIterator(void *context, int8_t dir) {
+ UCaseContext *csc=(UCaseContext *)context;
+ UChar32 c;
+
+ if(dir<0) {
+ /* reset for backward iteration */
+ csc->index=csc->cpStart;
+ csc->dir=dir;
+ } else if(dir>0) {
+ /* reset for forward iteration */
+ csc->index=csc->cpLimit;
+ csc->dir=dir;
+ } else {
+ /* continue current iteration direction */
+ dir=csc->dir;
+ }
+
+ if(dir<0) {
+ if(csc->start<csc->index) {
+ U8_PREV((const uint8_t *)csc->p, csc->start, csc->index, c);
+ return c;
+ }
+ } else {
+ if(csc->index<csc->limit) {
+ U8_NEXT((const uint8_t *)csc->p, csc->index, csc->limit, c);
+ return c;
+ }
+ }
+ return U_SENTINEL;
+}
+
+/**
+ * caseLocale >= 0: Lowercases [srcStart..srcLimit[ but takes context [0..srcLength[ into account.
+ * caseLocale < 0: Case-folds [srcStart..srcLimit[.
+ */
+void toLower(int32_t caseLocale, uint32_t options,
+ const uint8_t *src, UCaseContext *csc, int32_t srcStart, int32_t srcLimit,
+ icu::ByteSink &sink, icu::Edits *edits, UErrorCode &errorCode) {
+ const int8_t *latinToLower;
+ if (caseLocale == UCASE_LOC_ROOT ||
+ (caseLocale >= 0 ?
+ !(caseLocale == UCASE_LOC_TURKISH || caseLocale == UCASE_LOC_LITHUANIAN) :
+ (options & _FOLD_CASE_OPTIONS_MASK) == U_FOLD_CASE_DEFAULT)) {
+ latinToLower = LatinCase::TO_LOWER_NORMAL;
+ } else {
+ latinToLower = LatinCase::TO_LOWER_TR_LT;
+ }
+ const UTrie2 *trie = ucase_getTrie();
+ int32_t prev = srcStart;
+ int32_t srcIndex = srcStart;
+ for (;;) {
+ // fast path for simple cases
+ int32_t cpStart;
+ UChar32 c;
+ for (;;) {
+ if (U_FAILURE(errorCode) || srcIndex >= srcLimit) {
+ c = U_SENTINEL;
+ break;
+ }
+ uint8_t lead = src[srcIndex++];
+ if (lead <= 0x7f) {
+ int8_t d = latinToLower[lead];
+ if (d == LatinCase::EXC) {
+ cpStart = srcIndex - 1;
+ c = lead;
+ break;
+ }
+ if (d == 0) { continue; }
+ ByteSinkUtil::appendUnchanged(src + prev, srcIndex - 1 - prev,
+ sink, options, edits, errorCode);
+ char ascii = (char)(lead + d);
+ sink.Append(&ascii, 1);
+ if (edits != nullptr) {
+ edits->addReplace(1, 1);
+ }
+ prev = srcIndex;
+ continue;
+ } else if (lead < 0xe3) {
+ uint8_t t;
+ if (0xc2 <= lead && lead <= 0xc5 && srcIndex < srcLimit &&
+ (t = src[srcIndex] - 0x80) <= 0x3f) {
+ // U+0080..U+017F
+ ++srcIndex;
+ c = ((lead - 0xc0) << 6) | t;
+ int8_t d = latinToLower[c];
+ if (d == LatinCase::EXC) {
+ cpStart = srcIndex - 2;
+ break;
+ }
+ if (d == 0) { continue; }
+ ByteSinkUtil::appendUnchanged(src + prev, srcIndex - 2 - prev,
+ sink, options, edits, errorCode);
+ ByteSinkUtil::appendTwoBytes(c + d, sink);
+ if (edits != nullptr) {
+ edits->addReplace(2, 2);
+ }
+ prev = srcIndex;
+ continue;
+ }
+ } else if ((lead <= 0xe9 || lead == 0xeb || lead == 0xec) &&
+ (srcIndex + 2) <= srcLimit &&
+ U8_IS_TRAIL(src[srcIndex]) && U8_IS_TRAIL(src[srcIndex + 1])) {
+ // most of CJK: no case mappings
+ srcIndex += 2;
+ continue;
+ }
+ cpStart = --srcIndex;
+ U8_NEXT(src, srcIndex, srcLimit, c);
+ if (c < 0) {
+ // ill-formed UTF-8
+ continue;
+ }
+ uint16_t props = UTRIE2_GET16(trie, c);
+ if (UCASE_HAS_EXCEPTION(props)) { break; }
+ int32_t delta;
+ if (!UCASE_IS_UPPER_OR_TITLE(props) || (delta = UCASE_GET_DELTA(props)) == 0) {
+ continue;
+ }
+ ByteSinkUtil::appendUnchanged(src + prev, cpStart - prev,
+ sink, options, edits, errorCode);
+ ByteSinkUtil::appendCodePoint(srcIndex - cpStart, c + delta, sink, edits);
+ prev = srcIndex;
+ }
+ if (c < 0) {
+ break;
+ }
+ // slow path
+ const char16_t *s;
+ if (caseLocale >= 0) {
+ csc->cpStart = cpStart;
+ csc->cpLimit = srcIndex;
+ c = ucase_toFullLower(c, utf8_caseContextIterator, csc, &s, caseLocale);
+ } else {
+ c = ucase_toFullFolding(c, &s, options);
+ }
+ if (c >= 0) {
+ ByteSinkUtil::appendUnchanged(src + prev, cpStart - prev,
+ sink, options, edits, errorCode);
+ appendResult(srcIndex - cpStart, c, s, sink, options, edits, errorCode);
+ prev = srcIndex;
+ }
+ }
+ ByteSinkUtil::appendUnchanged(src + prev, srcIndex - prev,
+ sink, options, edits, errorCode);
+}
+
+void toUpper(int32_t caseLocale, uint32_t options,
+ const uint8_t *src, UCaseContext *csc, int32_t srcLength,
+ icu::ByteSink &sink, icu::Edits *edits, UErrorCode &errorCode) {
+ const int8_t *latinToUpper;
+ if (caseLocale == UCASE_LOC_TURKISH) {
+ latinToUpper = LatinCase::TO_UPPER_TR;
+ } else {
+ latinToUpper = LatinCase::TO_UPPER_NORMAL;
+ }
+ const UTrie2 *trie = ucase_getTrie();
+ int32_t prev = 0;
+ int32_t srcIndex = 0;
+ for (;;) {
+ // fast path for simple cases
+ int32_t cpStart;
+ UChar32 c;
+ for (;;) {
+ if (U_FAILURE(errorCode) || srcIndex >= srcLength) {
+ c = U_SENTINEL;
+ break;
+ }
+ uint8_t lead = src[srcIndex++];
+ if (lead <= 0x7f) {
+ int8_t d = latinToUpper[lead];
+ if (d == LatinCase::EXC) {
+ cpStart = srcIndex - 1;
+ c = lead;
+ break;
+ }
+ if (d == 0) { continue; }
+ ByteSinkUtil::appendUnchanged(src + prev, srcIndex - 1 - prev,
+ sink, options, edits, errorCode);
+ char ascii = (char)(lead + d);
+ sink.Append(&ascii, 1);
+ if (edits != nullptr) {
+ edits->addReplace(1, 1);
+ }
+ prev = srcIndex;
+ continue;
+ } else if (lead < 0xe3) {
+ uint8_t t;
+ if (0xc2 <= lead && lead <= 0xc5 && srcIndex < srcLength &&
+ (t = src[srcIndex] - 0x80) <= 0x3f) {
+ // U+0080..U+017F
+ ++srcIndex;
+ c = ((lead - 0xc0) << 6) | t;
+ int8_t d = latinToUpper[c];
+ if (d == LatinCase::EXC) {
+ cpStart = srcIndex - 2;
+ break;
+ }
+ if (d == 0) { continue; }
+ ByteSinkUtil::appendUnchanged(src + prev, srcIndex - 2 - prev,
+ sink, options, edits, errorCode);
+ ByteSinkUtil::appendTwoBytes(c + d, sink);
+ if (edits != nullptr) {
+ edits->addReplace(2, 2);
+ }
+ prev = srcIndex;
+ continue;
+ }
+ } else if ((lead <= 0xe9 || lead == 0xeb || lead == 0xec) &&
+ (srcIndex + 2) <= srcLength &&
+ U8_IS_TRAIL(src[srcIndex]) && U8_IS_TRAIL(src[srcIndex + 1])) {
+ // most of CJK: no case mappings
+ srcIndex += 2;
+ continue;
+ }
+ cpStart = --srcIndex;
+ U8_NEXT(src, srcIndex, srcLength, c);
+ if (c < 0) {
+ // ill-formed UTF-8
+ continue;
+ }
+ uint16_t props = UTRIE2_GET16(trie, c);
+ if (UCASE_HAS_EXCEPTION(props)) { break; }
+ int32_t delta;
+ if (UCASE_GET_TYPE(props) != UCASE_LOWER || (delta = UCASE_GET_DELTA(props)) == 0) {
+ continue;
+ }
+ ByteSinkUtil::appendUnchanged(src + prev, cpStart - prev,
+ sink, options, edits, errorCode);
+ ByteSinkUtil::appendCodePoint(srcIndex - cpStart, c + delta, sink, edits);
+ prev = srcIndex;
+ }
+ if (c < 0) {
+ break;
+ }
+ // slow path
+ csc->cpStart = cpStart;
+ csc->cpLimit = srcIndex;
+ const char16_t *s;
+ c = ucase_toFullUpper(c, utf8_caseContextIterator, csc, &s, caseLocale);
+ if (c >= 0) {
+ ByteSinkUtil::appendUnchanged(src + prev, cpStart - prev,
+ sink, options, edits, errorCode);
+ appendResult(srcIndex - cpStart, c, s, sink, options, edits, errorCode);
+ prev = srcIndex;
+ }
+ }
+ ByteSinkUtil::appendUnchanged(src + prev, srcIndex - prev,
+ sink, options, edits, errorCode);
+}
+
+} // namespace
+
+#if !UCONFIG_NO_BREAK_ITERATION
+
+namespace {
+
+constexpr uint8_t ACUTE_BYTE0 = u8"\u0301"[0];
+
+constexpr uint8_t ACUTE_BYTE1 = u8"\u0301"[1];
+
+/**
+ * Input: c is a letter I with or without acute accent.
+ * start is the index in src after c, and is less than segmentLimit.
+ * If a plain i/I is followed by a plain j/J,
+ * or an i/I with acute (precomposed or decomposed) is followed by a j/J with acute,
+ * then we output accordingly.
+ *
+ * @return the src index after the titlecased sequence, or the start index if no Dutch IJ
+ */
+int32_t maybeTitleDutchIJ(const uint8_t *src, UChar32 c, int32_t start, int32_t segmentLimit,
+ ByteSink &sink, uint32_t options, icu::Edits *edits, UErrorCode &errorCode) {
+ U_ASSERT(start < segmentLimit);
+
+ int32_t index = start;
+ bool withAcute = false;
+
+ // If the conditions are met, then the following variables tell us what to output.
+ int32_t unchanged1 = 0; // code units before the j, or the whole sequence (0..3)
+ bool doTitleJ = false; // true if the j needs to be titlecased
+ int32_t unchanged2 = 0; // after the j (0 or 1)
+
+ // next character after the first letter
+ UChar32 c2;
+ c2 = src[index++];
+
+ // Is the first letter an i/I with accent?
+ if (c == u'I') {
+ if (c2 == ACUTE_BYTE0 && index < segmentLimit && src[index++] == ACUTE_BYTE1) {
+ withAcute = true;
+ unchanged1 = 2; // ACUTE is 2 code units in UTF-8
+ if (index == segmentLimit) { return start; }
+ c2 = src[index++];
+ }
+ } else { // Í
+ withAcute = true;
+ }
+
+ // Is the next character a j/J?
+ if (c2 == u'j') {
+ doTitleJ = true;
+ } else if (c2 == u'J') {
+ ++unchanged1;
+ } else {
+ return start;
+ }
+
+ // A plain i/I must be followed by a plain j/J.
+ // An i/I with acute must be followed by a j/J with acute.
+ if (withAcute) {
+ if ((index + 1) >= segmentLimit || src[index++] != ACUTE_BYTE0 || src[index++] != ACUTE_BYTE1) {
+ return start;
+ }
+ if (doTitleJ) {
+ unchanged2 = 2; // ACUTE is 2 code units in UTF-8
+ } else {
+ unchanged1 = unchanged1 + 2; // ACUTE is 2 code units in UTF-8
+ }
+ }
+
+ // There must not be another combining mark.
+ if (index < segmentLimit) {
+ int32_t cp;
+ int32_t i = index;
+ U8_NEXT(src, i, segmentLimit, cp);
+ uint32_t typeMask = U_GET_GC_MASK(cp);
+ if ((typeMask & U_GC_M_MASK) != 0) {
+ return start;
+ }
+ }
+
+ // Output the rest of the Dutch IJ.
+ ByteSinkUtil::appendUnchanged(src + start, unchanged1, sink, options, edits, errorCode);
+ start += unchanged1;
+ if (doTitleJ) {
+ ByteSinkUtil::appendCodePoint(1, u'J', sink, edits);
+ ++start;
+ }
+ ByteSinkUtil::appendUnchanged(src + start, unchanged2, sink, options, edits, errorCode);
+
+ U_ASSERT(start + unchanged2 == index);
+ return index;
+}
+
+} // namespace
+
+U_CFUNC void U_CALLCONV
+ucasemap_internalUTF8ToTitle(
+ int32_t caseLocale, uint32_t options, BreakIterator *iter,
+ const uint8_t *src, int32_t srcLength,
+ ByteSink &sink, icu::Edits *edits,
+ UErrorCode &errorCode) {
+ if (!ustrcase_checkTitleAdjustmentOptions(options, errorCode)) {
+ return;
+ }
+
+ /* set up local variables */
+ UCaseContext csc=UCASECONTEXT_INITIALIZER;
+ csc.p=(void *)src;
+ csc.limit=srcLength;
+ int32_t prev=0;
+ UBool isFirstIndex=true;
+
+ /* titlecasing loop */
+ while(prev<srcLength) {
+ /* find next index where to titlecase */
+ int32_t index;
+ if(isFirstIndex) {
+ isFirstIndex=false;
+ index=iter->first();
+ } else {
+ index=iter->next();
+ }
+ if(index==UBRK_DONE || index>srcLength) {
+ index=srcLength;
+ }
+
+ /*
+ * Segment [prev..index[ into 3 parts:
+ * a) skipped characters (copy as-is) [prev..titleStart[
+ * b) first letter (titlecase) [titleStart..titleLimit[
+ * c) subsequent characters (lowercase) [titleLimit..index[
+ */
+ if(prev<index) {
+ /* find and copy skipped characters [prev..titleStart[ */
+ int32_t titleStart=prev;
+ int32_t titleLimit=prev;
+ UChar32 c;
+ U8_NEXT(src, titleLimit, index, c);
+ if ((options&U_TITLECASE_NO_BREAK_ADJUSTMENT)==0) {
+ // Adjust the titlecasing index to the next cased character,
+ // or to the next letter/number/symbol/private use.
+ // Stop with titleStart<titleLimit<=index
+ // if there is a character to be titlecased,
+ // or else stop with titleStart==titleLimit==index.
+ UBool toCased = (options&U_TITLECASE_ADJUST_TO_CASED) != 0;
+ while (toCased ? UCASE_NONE==ucase_getType(c) : !ustrcase_isLNS(c)) {
+ titleStart=titleLimit;
+ if(titleLimit==index) {
+ break;
+ }
+ U8_NEXT(src, titleLimit, index, c);
+ }
+ if (prev < titleStart) {
+ if (!ByteSinkUtil::appendUnchanged(src+prev, titleStart-prev,
+ sink, options, edits, errorCode)) {
+ return;
+ }
+ }
+ }
+
+ if(titleStart<titleLimit) {
+ /* titlecase c which is from [titleStart..titleLimit[ */
+ if(c>=0) {
+ csc.cpStart=titleStart;
+ csc.cpLimit=titleLimit;
+ const char16_t *s;
+ c=ucase_toFullTitle(c, utf8_caseContextIterator, &csc, &s, caseLocale);
+ if (!appendResult(titleLimit-titleStart, c, s, sink, options, edits, errorCode)) {
+ return;
+ }
+ } else {
+ // Malformed UTF-8.
+ if (!ByteSinkUtil::appendUnchanged(src+titleStart, titleLimit-titleStart,
+ sink, options, edits, errorCode)) {
+ return;
+ }
+ }
+
+ /* Special case Dutch IJ titlecasing */
+ if (titleLimit < index &&
+ caseLocale == UCASE_LOC_DUTCH) {
+ if (c < 0) {
+ c = ~c;
+ }
+
+ if (c == u'I' || c == u'Í') {
+ titleLimit = maybeTitleDutchIJ(src, c, titleLimit, index, sink, options, edits, errorCode);
+ }
+ }
+
+ /* lowercase [titleLimit..index[ */
+ if(titleLimit<index) {
+ if((options&U_TITLECASE_NO_LOWERCASE)==0) {
+ /* Normal operation: Lowercase the rest of the word. */
+ toLower(caseLocale, options,
+ src, &csc, titleLimit, index,
+ sink, edits, errorCode);
+ if(U_FAILURE(errorCode)) {
+ return;
+ }
+ } else {
+ /* Optionally just copy the rest of the word unchanged. */
+ if (!ByteSinkUtil::appendUnchanged(src+titleLimit, index-titleLimit,
+ sink, options, edits, errorCode)) {
+ return;
+ }
+ }
+ }
+ }
+ }
+
+ prev=index;
+ }
+}
+
+#endif
+
+U_NAMESPACE_BEGIN
+namespace GreekUpper {
+
+UBool isFollowedByCasedLetter(const uint8_t *s, int32_t i, int32_t length) {
+ while (i < length) {
+ UChar32 c;
+ U8_NEXT(s, i, length, c);
+ int32_t type = ucase_getTypeOrIgnorable(c);
+ if ((type & UCASE_IGNORABLE) != 0) {
+ // Case-ignorable, continue with the loop.
+ } else if (type != UCASE_NONE) {
+ return true; // Followed by cased letter.
+ } else {
+ return false; // Uncased and not case-ignorable.
+ }
+ }
+ return false; // Not followed by cased letter.
+}
+
+// Keep this consistent with the UTF-16 version in ustrcase.cpp and the Java version in CaseMap.java.
+void toUpper(uint32_t options,
+ const uint8_t *src, int32_t srcLength,
+ ByteSink &sink, Edits *edits,
+ UErrorCode &errorCode) {
+ uint32_t state = 0;
+ for (int32_t i = 0; i < srcLength;) {
+ int32_t nextIndex = i;
+ UChar32 c;
+ U8_NEXT(src, nextIndex, srcLength, c);
+ uint32_t nextState = 0;
+ int32_t type = ucase_getTypeOrIgnorable(c);
+ if ((type & UCASE_IGNORABLE) != 0) {
+ // c is case-ignorable
+ nextState |= (state & AFTER_CASED);
+ } else if (type != UCASE_NONE) {
+ // c is cased
+ nextState |= AFTER_CASED;
+ }
+ uint32_t data = getLetterData(c);
+ if (data > 0) {
+ uint32_t upper = data & UPPER_MASK;
+ // Add a dialytika to this iota or ypsilon vowel
+ // if we removed a tonos from the previous vowel,
+ // and that previous vowel did not also have (or gain) a dialytika.
+ // Adding one only to the final vowel in a longer sequence
+ // (which does not occur in normal writing) would require lookahead.
+ // Set the same flag as for preserving an existing dialytika.
+ if ((data & HAS_VOWEL) != 0 && (state & AFTER_VOWEL_WITH_ACCENT) != 0 &&
+ (upper == 0x399 || upper == 0x3A5)) {
+ data |= HAS_DIALYTIKA;
+ }
+ int32_t numYpogegrammeni = 0; // Map each one to a trailing, spacing, capital iota.
+ if ((data & HAS_YPOGEGRAMMENI) != 0) {
+ numYpogegrammeni = 1;
+ }
+ // Skip combining diacritics after this Greek letter.
+ int32_t nextNextIndex = nextIndex;
+ while (nextIndex < srcLength) {
+ UChar32 c2;
+ U8_NEXT(src, nextNextIndex, srcLength, c2);
+ uint32_t diacriticData = getDiacriticData(c2);
+ if (diacriticData != 0) {
+ data |= diacriticData;
+ if ((diacriticData & HAS_YPOGEGRAMMENI) != 0) {
+ ++numYpogegrammeni;
+ }
+ nextIndex = nextNextIndex;
+ } else {
+ break; // not a Greek diacritic
+ }
+ }
+ if ((data & HAS_VOWEL_AND_ACCENT_AND_DIALYTIKA) == HAS_VOWEL_AND_ACCENT) {
+ nextState |= AFTER_VOWEL_WITH_ACCENT;
+ }
+ // Map according to Greek rules.
+ UBool addTonos = false;
+ if (upper == 0x397 &&
+ (data & HAS_ACCENT) != 0 &&
+ numYpogegrammeni == 0 &&
+ (state & AFTER_CASED) == 0 &&
+ !isFollowedByCasedLetter(src, nextIndex, srcLength)) {
+ // Keep disjunctive "or" with (only) a tonos.
+ // We use the same "word boundary" conditions as for the Final_Sigma test.
+ if (i == nextIndex) {
+ upper = 0x389; // Preserve the precomposed form.
+ } else {
+ addTonos = true;
+ }
+ } else if ((data & HAS_DIALYTIKA) != 0) {
+ // Preserve a vowel with dialytika in precomposed form if it exists.
+ if (upper == 0x399) {
+ upper = 0x3AA;
+ data &= ~HAS_EITHER_DIALYTIKA;
+ } else if (upper == 0x3A5) {
+ upper = 0x3AB;
+ data &= ~HAS_EITHER_DIALYTIKA;
+ }
+ }
+
+ UBool change;
+ if (edits == nullptr && (options & U_OMIT_UNCHANGED_TEXT) == 0) {
+ change = true; // common, simple usage
+ } else {
+ // Find out first whether we are changing the text.
+ U_ASSERT(0x370 <= upper && upper <= 0x3ff); // 2-byte UTF-8, main Greek block
+ change = (i + 2) > nextIndex ||
+ src[i] != getTwoByteLead(upper) || src[i + 1] != getTwoByteTrail(upper) ||
+ numYpogegrammeni > 0;
+ int32_t i2 = i + 2;
+ if ((data & HAS_EITHER_DIALYTIKA) != 0) {
+ change |= (i2 + 2) > nextIndex ||
+ src[i2] != (uint8_t)u8"\u0308"[0] ||
+ src[i2 + 1] != (uint8_t)u8"\u0308"[1];
+ i2 += 2;
+ }
+ if (addTonos) {
+ change |= (i2 + 2) > nextIndex ||
+ src[i2] != (uint8_t)u8"\u0301"[0] ||
+ src[i2 + 1] != (uint8_t)u8"\u0301"[1];
+ i2 += 2;
+ }
+ int32_t oldLength = nextIndex - i;
+ int32_t newLength = (i2 - i) + numYpogegrammeni * 2; // 2 bytes per U+0399
+ change |= oldLength != newLength;
+ if (change) {
+ if (edits != nullptr) {
+ edits->addReplace(oldLength, newLength);
+ }
+ } else {
+ if (edits != nullptr) {
+ edits->addUnchanged(oldLength);
+ }
+ // Write unchanged text?
+ change = (options & U_OMIT_UNCHANGED_TEXT) == 0;
+ }
+ }
+
+ if (change) {
+ ByteSinkUtil::appendTwoBytes(upper, sink);
+ if ((data & HAS_EITHER_DIALYTIKA) != 0) {
+ sink.AppendU8(u8"\u0308", 2); // restore or add a dialytika
+ }
+ if (addTonos) {
+ sink.AppendU8(u8"\u0301", 2);
+ }
+ while (numYpogegrammeni > 0) {
+ sink.AppendU8(u8"\u0399", 2);
+ --numYpogegrammeni;
+ }
+ }
+ } else if(c>=0) {
+ const char16_t *s;
+ c=ucase_toFullUpper(c, nullptr, nullptr, &s, UCASE_LOC_GREEK);
+ if (!appendResult(nextIndex - i, c, s, sink, options, edits, errorCode)) {
+ return;
+ }
+ } else {
+ // Malformed UTF-8.
+ if (!ByteSinkUtil::appendUnchanged(src+i, nextIndex-i,
+ sink, options, edits, errorCode)) {
+ return;
+ }
+ }
+ i = nextIndex;
+ state = nextState;
+ }
+}
+
+} // namespace GreekUpper
+U_NAMESPACE_END
+
+static void U_CALLCONV
+ucasemap_internalUTF8ToLower(int32_t caseLocale, uint32_t options, UCASEMAP_BREAK_ITERATOR_UNUSED
+ const uint8_t *src, int32_t srcLength,
+ icu::ByteSink &sink, icu::Edits *edits,
+ UErrorCode &errorCode) {
+ UCaseContext csc=UCASECONTEXT_INITIALIZER;
+ csc.p=(void *)src;
+ csc.limit=srcLength;
+ toLower(
+ caseLocale, options,
+ src, &csc, 0, srcLength,
+ sink, edits, errorCode);
+}
+
+static void U_CALLCONV
+ucasemap_internalUTF8ToUpper(int32_t caseLocale, uint32_t options, UCASEMAP_BREAK_ITERATOR_UNUSED
+ const uint8_t *src, int32_t srcLength,
+ icu::ByteSink &sink, icu::Edits *edits,
+ UErrorCode &errorCode) {
+ if (caseLocale == UCASE_LOC_GREEK) {
+ GreekUpper::toUpper(options, src, srcLength, sink, edits, errorCode);
+ } else {
+ UCaseContext csc=UCASECONTEXT_INITIALIZER;
+ csc.p=(void *)src;
+ csc.limit=srcLength;
+ toUpper(
+ caseLocale, options,
+ src, &csc, srcLength,
+ sink, edits, errorCode);
+ }
+}
+
+static void U_CALLCONV
+ucasemap_internalUTF8Fold(int32_t /* caseLocale */, uint32_t options, UCASEMAP_BREAK_ITERATOR_UNUSED
+ const uint8_t *src, int32_t srcLength,
+ icu::ByteSink &sink, icu::Edits *edits,
+ UErrorCode &errorCode) {
+ toLower(
+ -1, options,
+ src, nullptr, 0, srcLength,
+ sink, edits, errorCode);
+}
+
+void
+ucasemap_mapUTF8(int32_t caseLocale, uint32_t options, UCASEMAP_BREAK_ITERATOR_PARAM
+ const char *src, int32_t srcLength,
+ UTF8CaseMapper *stringCaseMapper,
+ icu::ByteSink &sink, icu::Edits *edits,
+ UErrorCode &errorCode) {
+ /* check argument values */
+ if (U_FAILURE(errorCode)) {
+ return;
+ }
+ if ((src == nullptr && srcLength != 0) || srcLength < -1) {
+ errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
+
+ // Get the string length.
+ if (srcLength == -1) {
+ srcLength = (int32_t)uprv_strlen((const char *)src);
+ }
+
+ if (edits != nullptr && (options & U_EDITS_NO_RESET) == 0) {
+ edits->reset();
+ }
+ stringCaseMapper(caseLocale, options, UCASEMAP_BREAK_ITERATOR
+ (const uint8_t *)src, srcLength, sink, edits, errorCode);
+ sink.Flush();
+ if (U_SUCCESS(errorCode)) {
+ if (edits != nullptr) {
+ edits->copyErrorTo(errorCode);
+ }
+ }
+}
+
+int32_t
+ucasemap_mapUTF8(int32_t caseLocale, uint32_t options, UCASEMAP_BREAK_ITERATOR_PARAM
+ char *dest, int32_t destCapacity,
+ const char *src, int32_t srcLength,
+ UTF8CaseMapper *stringCaseMapper,
+ icu::Edits *edits,
+ UErrorCode &errorCode) {
+ /* check argument values */
+ if(U_FAILURE(errorCode)) {
+ return 0;
+ }
+ if( destCapacity<0 ||
+ (dest==nullptr && destCapacity>0) ||
+ (src==nullptr && srcLength!=0) || srcLength<-1
+ ) {
+ errorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ /* get the string length */
+ if(srcLength==-1) {
+ srcLength=(int32_t)uprv_strlen((const char *)src);
+ }
+
+ /* check for overlapping source and destination */
+ if( dest!=nullptr &&
+ ((src>=dest && src<(dest+destCapacity)) ||
+ (dest>=src && dest<(src+srcLength)))
+ ) {
+ errorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ CheckedArrayByteSink sink(dest, destCapacity);
+ if (edits != nullptr && (options & U_EDITS_NO_RESET) == 0) {
+ edits->reset();
+ }
+ stringCaseMapper(caseLocale, options, UCASEMAP_BREAK_ITERATOR
+ (const uint8_t *)src, srcLength, sink, edits, errorCode);
+ sink.Flush();
+ if (U_SUCCESS(errorCode)) {
+ if (sink.Overflowed()) {
+ errorCode = U_BUFFER_OVERFLOW_ERROR;
+ } else if (edits != nullptr) {
+ edits->copyErrorTo(errorCode);
+ }
+ }
+ return u_terminateChars(dest, destCapacity, sink.NumberOfBytesAppended(), &errorCode);
+}
+
+/* public API functions */
+
+U_CAPI int32_t U_EXPORT2
+ucasemap_utf8ToLower(const UCaseMap *csm,
+ char *dest, int32_t destCapacity,
+ const char *src, int32_t srcLength,
+ UErrorCode *pErrorCode) {
+ return ucasemap_mapUTF8(
+ csm->caseLocale, csm->options, UCASEMAP_BREAK_ITERATOR_NULL
+ dest, destCapacity,
+ src, srcLength,
+ ucasemap_internalUTF8ToLower, nullptr, *pErrorCode);
+}
+
+U_CAPI int32_t U_EXPORT2
+ucasemap_utf8ToUpper(const UCaseMap *csm,
+ char *dest, int32_t destCapacity,
+ const char *src, int32_t srcLength,
+ UErrorCode *pErrorCode) {
+ return ucasemap_mapUTF8(
+ csm->caseLocale, csm->options, UCASEMAP_BREAK_ITERATOR_NULL
+ dest, destCapacity,
+ src, srcLength,
+ ucasemap_internalUTF8ToUpper, nullptr, *pErrorCode);
+}
+
+U_CAPI int32_t U_EXPORT2
+ucasemap_utf8FoldCase(const UCaseMap *csm,
+ char *dest, int32_t destCapacity,
+ const char *src, int32_t srcLength,
+ UErrorCode *pErrorCode) {
+ return ucasemap_mapUTF8(
+ UCASE_LOC_ROOT, csm->options, UCASEMAP_BREAK_ITERATOR_NULL
+ dest, destCapacity,
+ src, srcLength,
+ ucasemap_internalUTF8Fold, nullptr, *pErrorCode);
+}
+
+U_NAMESPACE_BEGIN
+
+void CaseMap::utf8ToLower(
+ const char *locale, uint32_t options,
+ StringPiece src, ByteSink &sink, Edits *edits,
+ UErrorCode &errorCode) {
+ ucasemap_mapUTF8(
+ ustrcase_getCaseLocale(locale), options, UCASEMAP_BREAK_ITERATOR_NULL
+ src.data(), src.length(),
+ ucasemap_internalUTF8ToLower, sink, edits, errorCode);
+}
+
+void CaseMap::utf8ToUpper(
+ const char *locale, uint32_t options,
+ StringPiece src, ByteSink &sink, Edits *edits,
+ UErrorCode &errorCode) {
+ ucasemap_mapUTF8(
+ ustrcase_getCaseLocale(locale), options, UCASEMAP_BREAK_ITERATOR_NULL
+ src.data(), src.length(),
+ ucasemap_internalUTF8ToUpper, sink, edits, errorCode);
+}
+
+void CaseMap::utf8Fold(
+ uint32_t options,
+ StringPiece src, ByteSink &sink, Edits *edits,
+ UErrorCode &errorCode) {
+ ucasemap_mapUTF8(
+ UCASE_LOC_ROOT, options, UCASEMAP_BREAK_ITERATOR_NULL
+ src.data(), src.length(),
+ ucasemap_internalUTF8Fold, sink, edits, errorCode);
+}
+
+int32_t CaseMap::utf8ToLower(
+ const char *locale, uint32_t options,
+ const char *src, int32_t srcLength,
+ char *dest, int32_t destCapacity, Edits *edits,
+ UErrorCode &errorCode) {
+ return ucasemap_mapUTF8(
+ ustrcase_getCaseLocale(locale), options, UCASEMAP_BREAK_ITERATOR_NULL
+ dest, destCapacity,
+ src, srcLength,
+ ucasemap_internalUTF8ToLower, edits, errorCode);
+}
+
+int32_t CaseMap::utf8ToUpper(
+ const char *locale, uint32_t options,
+ const char *src, int32_t srcLength,
+ char *dest, int32_t destCapacity, Edits *edits,
+ UErrorCode &errorCode) {
+ return ucasemap_mapUTF8(
+ ustrcase_getCaseLocale(locale), options, UCASEMAP_BREAK_ITERATOR_NULL
+ dest, destCapacity,
+ src, srcLength,
+ ucasemap_internalUTF8ToUpper, edits, errorCode);
+}
+
+int32_t CaseMap::utf8Fold(
+ uint32_t options,
+ const char *src, int32_t srcLength,
+ char *dest, int32_t destCapacity, Edits *edits,
+ UErrorCode &errorCode) {
+ return ucasemap_mapUTF8(
+ UCASE_LOC_ROOT, options, UCASEMAP_BREAK_ITERATOR_NULL
+ dest, destCapacity,
+ src, srcLength,
+ ucasemap_internalUTF8Fold, edits, errorCode);
+}
+
+U_NAMESPACE_END
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 13:10:02 +0000