// © 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(NULL),
#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 NULL;
}
UCaseMap *csm = new UCaseMap(locale, options, pErrorCode);
if(csm==NULL) {
*pErrorCode = U_MEMORY_ALLOCATION_ERROR;
return NULL;
} else if (U_FAILURE(*pErrorCode)) {
delete csm;
return NULL;
}
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 != NULL && *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_LOC_UNKNOWN;
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 UChar *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!=NULL) {
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 UChar *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 UChar *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
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 UChar *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 (titleStart+1 < index &&
caseLocale == UCASE_LOC_DUTCH &&
(src[titleStart] == 0x0049 || src[titleStart] == 0x0069)) {
if (src[titleStart+1] == 0x006A) {
ByteSinkUtil::appendCodePoint(1, 0x004A, sink, edits);
titleLimit++;
} else if (src[titleStart+1] == 0x004A) {
// Keep the capital J from getting lowercased.
if (!ByteSinkUtil::appendUnchanged(src+titleStart+1, 1,
sink, options, edits, errorCode)) {
return;
}
titleLimit++;
}
}
/* 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 != NULL) {
edits->addReplace(oldLength, newLength);
}
} else {
if (edits != NULL) {
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.Append(u8"\u0308", 2); // restore or add a dialytika
}
if (addTonos) {
sink.Append(u8"\u0301", 2);
}
while (numYpogegrammeni > 0) {
sink.Append(u8"\u0399", 2);
--numYpogegrammeni;
}
}
} else if(c>=0) {
const UChar *s;
c=ucase_toFullUpper(c, NULL, NULL, &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==NULL && destCapacity>0) ||
(src==NULL && 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!=NULL &&
((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, NULL, *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, NULL, *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, NULL, *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