U_CAPI void U_EXPORT2
u_init(UErrorCode *status) {
UTRACE_ENTRY_OC(UTRACE_U_INIT);
/* Make sure the global mutexes are initialized. */
umtx_init(NULL);
umtx_lock(&gICUInitMutex);
if (gICUInitialized || U_FAILURE(*status)) {
umtx_unlock(&gICUInitMutex);
UTRACE_EXIT_STATUS(*status);
return;
}
/* Do any required init for services that don't have open operations
* and use "only" the double-check initialization method for performance
* reasons (avoiding a mutex lock even for _checking_ whether the
* initialization had occurred).
*/
/* Char Properties */
uprv_loadPropsData(status);
#if !UCONFIG_NO_NORMALIZATION
/* Normalization */
unorm_haveData(status);
#endif
gICUInitialized = TRUE; /* TODO: don't set if U_FAILURE? */
umtx_unlock(&gICUInitMutex);
UTRACE_EXIT_STATUS(*status);
}
U_CAPI void U_EXPORT2
u_init(UErrorCode *status) {
UTRACE_ENTRY_OC(UTRACE_U_INIT);
/* Make sure the global mutexes are initialized. */
umtx_init(NULL);
umtx_lock(&gICUInitMutex);
if (gICUInitialized || U_FAILURE(*status)) {
umtx_unlock(&gICUInitMutex);
UTRACE_EXIT_STATUS(*status);
return;
}
#if 1
/*
* 2005-may-02
*
* ICU4C 3.4 (jitterbug 4497) hardcodes the data for Unicode character
* properties for APIs that want to be fast.
* Therefore, we need not load them here nor check for errors.
* Instead, we load the converter alias table to see if any ICU data
* is available.
* Users should really open the service objects they need and check
* for errors there, to make sure that the actual items they need are
* available.
*/
#if !UCONFIG_NO_CONVERSION
ucnv_io_countKnownConverters(status);
#endif
#else
/* Do any required init for services that don't have open operations
* and use "only" the double-check initialization method for performance
* reasons (avoiding a mutex lock even for _checking_ whether the
* initialization had occurred).
*/
/* Char Properties */
uprv_haveProperties(status);
/* load the case and bidi properties but don't fail if they are not available */
u_isULowercase(0x61);
u_getIntPropertyValue(0x200D, UCHAR_JOINING_TYPE); /* ZERO WIDTH JOINER: Join_Causing */
#if !UCONFIG_NO_NORMALIZATION
/* Normalization */
unorm_haveData(status);
#endif
#endif
gICUInitialized = TRUE; /* TODO: don't set if U_FAILURE? */
umtx_unlock(&gICUInitMutex);
UTRACE_EXIT_STATUS(*status);
}
void NormalizationTransliterator::registerIDs() {
UErrorCode errorCode = U_ZERO_ERROR;
if(!unorm_haveData(&errorCode)) {
return;
}
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-NFC"),
_create, integerToken(UNORM_NFC));
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-NFKC"),
_create, integerToken(UNORM_NFKC));
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-NFD"),
_create, integerToken(UNORM_NFD));
Transliterator::_registerFactory(UNICODE_STRING_SIMPLE("Any-NFKD"),
_create, integerToken(UNORM_NFKD));
Transliterator::_registerSpecialInverse(UNICODE_STRING_SIMPLE("NFC"),
UNICODE_STRING_SIMPLE("NFD"), TRUE);
Transliterator::_registerSpecialInverse(UNICODE_STRING_SIMPLE("NFKC"),
UNICODE_STRING_SIMPLE("NFKD"), TRUE);
}
U_CAPI int32_t U_EXPORT2
unorm_compare(const UChar *s1, int32_t length1,
const UChar *s2, int32_t length2,
uint32_t options,
UErrorCode *pErrorCode) {
UChar fcd1[300], fcd2[300];
UChar *d1, *d2;
const UnicodeSet *nx;
UNormalizationMode mode;
int32_t normOptions;
int32_t result;
/* argument checking */
if(pErrorCode==0 || U_FAILURE(*pErrorCode)) {
return 0;
}
if(s1==0 || length1<-1 || s2==0 || length2<-1) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
if(!unorm_haveData(pErrorCode)) {
return 0;
}
if(!uprv_haveProperties(pErrorCode)) {
return 0;
}
normOptions=(int32_t)(options>>UNORM_COMPARE_NORM_OPTIONS_SHIFT);
nx=unorm_getNX(normOptions, pErrorCode);
if(U_FAILURE(*pErrorCode)) {
return 0;
}
d1=d2=0;
options|=_COMPARE_EQUIV;
result=0;
/*
* UAX #21 Case Mappings, as fixed for Unicode version 4
* (see Jitterbug 2021), defines a canonical caseless match as
*
* A string X is a canonical caseless match
* for a string Y if and only if
* NFD(toCasefold(NFD(X))) = NFD(toCasefold(NFD(Y)))
*
* For better performance, we check for FCD (or let the caller tell us that
* both strings are in FCD) for the inner normalization.
* BasicNormalizerTest::FindFoldFCDExceptions() makes sure that
* case-folding preserves the FCD-ness of a string.
* The outer normalization is then only performed by unorm_cmpEquivFold()
* when there is a difference.
*
* Exception: When using the Turkic case-folding option, we do perform
* full NFD first. This is because in the Turkic case precomposed characters
* with 0049 capital I or 0069 small i fold differently whether they
* are first decomposed or not, so an FCD check - a check only for
* canonical order - is not sufficient.
*/
if(options&U_FOLD_CASE_EXCLUDE_SPECIAL_I) {
mode=UNORM_NFD;
options&=~UNORM_INPUT_IS_FCD;
} else {
mode=UNORM_FCD;
}
if(!(options&UNORM_INPUT_IS_FCD)) {
int32_t _len1, _len2;
UBool isFCD1, isFCD2;
// check if s1 and/or s2 fulfill the FCD conditions
isFCD1= UNORM_YES==unorm_internalQuickCheck(s1, length1, mode, TRUE, nx, pErrorCode);
isFCD2= UNORM_YES==unorm_internalQuickCheck(s2, length2, mode, TRUE, nx, pErrorCode);
if(U_FAILURE(*pErrorCode)) {
return 0;
}
/*
* ICU 2.4 had a further optimization:
* If both strings were not in FCD, then they were both NFD'ed,
* and the _COMPARE_EQUIV option was turned off.
* It is not entirely clear that this is valid with the current
* definition of the canonical caseless match.
* Therefore, ICU 2.6 removes that optimization.
*/
if(!isFCD1) {
_len1=unorm_internalNormalizeWithNX(fcd1, LENGTHOF(fcd1),
s1, length1,
mode, normOptions, nx,
pErrorCode);
if(*pErrorCode!=U_BUFFER_OVERFLOW_ERROR) {
s1=fcd1;
} else {
d1=(UChar *)uprv_malloc(_len1*U_SIZEOF_UCHAR);
if(d1==0) {
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
goto cleanup;
}
*pErrorCode=U_ZERO_ERROR;
_len1=unorm_internalNormalizeWithNX(d1, _len1,
s1, length1,
mode, normOptions, nx,
pErrorCode);
if(U_FAILURE(*pErrorCode)) {
goto cleanup;
}
s1=d1;
}
length1=_len1;
}
if(!isFCD2) {
_len2=unorm_internalNormalizeWithNX(fcd2, LENGTHOF(fcd2),
s2, length2,
mode, normOptions, nx,
pErrorCode);
if(*pErrorCode!=U_BUFFER_OVERFLOW_ERROR) {
s2=fcd2;
} else {
d2=(UChar *)uprv_malloc(_len2*U_SIZEOF_UCHAR);
if(d2==0) {
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
goto cleanup;
}
*pErrorCode=U_ZERO_ERROR;
_len2=unorm_internalNormalizeWithNX(d2, _len2,
s2, length2,
mode, normOptions, nx,
pErrorCode);
if(U_FAILURE(*pErrorCode)) {
goto cleanup;
}
s2=d2;
}
length2=_len2;
}
}
if(U_SUCCESS(*pErrorCode)) {
result=unorm_cmpEquivFold(s1, length1, s2, length2, options, pErrorCode);
}
cleanup:
if(d1!=0) {
uprv_free(d1);
}
if(d2!=0) {
uprv_free(d2);
}
return result;
}
/* internal function */
static int32_t
unorm_cmpEquivFold(const UChar *s1, int32_t length1,
const UChar *s2, int32_t length2,
uint32_t options,
UErrorCode *pErrorCode) {
const UCaseProps *csp;
/* current-level start/limit - s1/s2 as current */
const UChar *start1, *start2, *limit1, *limit2;
/* decomposition and case folding variables */
const UChar *p;
int32_t length;
/* stacks of previous-level start/current/limit */
CmpEquivLevel stack1[2], stack2[2];
/* decomposition buffers for Hangul */
UChar decomp1[4], decomp2[4];
/* case folding buffers, only use current-level start/limit */
UChar fold1[UCASE_MAX_STRING_LENGTH+1], fold2[UCASE_MAX_STRING_LENGTH+1];
/* track which is the current level per string */
int32_t level1, level2;
/* current code units, and code points for lookups */
UChar32 c1, c2, cp1, cp2;
/* no argument error checking because this itself is not an API */
/*
* assume that at least one of the options _COMPARE_EQUIV and U_COMPARE_IGNORE_CASE is set
* otherwise this function must behave exactly as uprv_strCompare()
* not checking for that here makes testing this function easier
*/
/* normalization/properties data loaded? */
if( ((options&_COMPARE_EQUIV)!=0 && !unorm_haveData(pErrorCode)) ||
U_FAILURE(*pErrorCode)
) {
return 0;
}
if((options&U_COMPARE_IGNORE_CASE)!=0) {
csp=ucase_getSingleton(pErrorCode);
if(U_FAILURE(*pErrorCode)) {
return 0;
}
} else {
csp=NULL;
}
/* initialize */
start1=s1;
if(length1==-1) {
limit1=NULL;
} else {
limit1=s1+length1;
}
start2=s2;
if(length2==-1) {
limit2=NULL;
} else {
limit2=s2+length2;
}
level1=level2=0;
c1=c2=-1;
/* comparison loop */
for(;;) {
/*
* here a code unit value of -1 means "get another code unit"
* below it will mean "this source is finished"
*/
if(c1<0) {
/* get next code unit from string 1, post-increment */
for(;;) {
if(s1==limit1 || ((c1=*s1)==0 && (limit1==NULL || (options&_STRNCMP_STYLE)))) {
if(level1==0) {
c1=-1;
break;
}
} else {
++s1;
break;
}
/* reached end of level buffer, pop one level */
do {
--level1;
start1=stack1[level1].start;
} while(start1==NULL);
s1=stack1[level1].s;
limit1=stack1[level1].limit;
}
}
if(c2<0) {
/* get next code unit from string 2, post-increment */
for(;;) {
if(s2==limit2 || ((c2=*s2)==0 && (limit2==NULL || (options&_STRNCMP_STYLE)))) {
if(level2==0) {
c2=-1;
break;
}
} else {
++s2;
break;
}
/* reached end of level buffer, pop one level */
do {
--level2;
start2=stack2[level2].start;
} while(start2==NULL);
s2=stack2[level2].s;
limit2=stack2[level2].limit;
}
}
/*
* compare c1 and c2
* either variable c1, c2 is -1 only if the corresponding string is finished
*/
if(c1==c2) {
if(c1<0) {
return 0; /* c1==c2==-1 indicating end of strings */
}
c1=c2=-1; /* make us fetch new code units */
continue;
} else if(c1<0) {
return -1; /* string 1 ends before string 2 */
} else if(c2<0) {
return 1; /* string 2 ends before string 1 */
}
/* c1!=c2 && c1>=0 && c2>=0 */
/* get complete code points for c1, c2 for lookups if either is a surrogate */
cp1=c1;
if(U_IS_SURROGATE(c1)) {
UChar c;
if(U_IS_SURROGATE_LEAD(c1)) {
if(s1!=limit1 && U16_IS_TRAIL(c=*s1)) {
/* advance ++s1; only below if cp1 decomposes/case-folds */
cp1=U16_GET_SUPPLEMENTARY(c1, c);
}
} else /* isTrail(c1) */ {
if(start1<=(s1-2) && U16_IS_LEAD(c=*(s1-2))) {
cp1=U16_GET_SUPPLEMENTARY(c, c1);
}
}
}
cp2=c2;
if(U_IS_SURROGATE(c2)) {
UChar c;
if(U_IS_SURROGATE_LEAD(c2)) {
if(s2!=limit2 && U16_IS_TRAIL(c=*s2)) {
/* advance ++s2; only below if cp2 decomposes/case-folds */
cp2=U16_GET_SUPPLEMENTARY(c2, c);
}
} else /* isTrail(c2) */ {
if(start2<=(s2-2) && U16_IS_LEAD(c=*(s2-2))) {
cp2=U16_GET_SUPPLEMENTARY(c, c2);
}
}
}
/*
* go down one level for each string
* continue with the main loop as soon as there is a real change
*/
if( level1==0 && (options&U_COMPARE_IGNORE_CASE) &&
(length=ucase_toFullFolding(csp, (UChar32)cp1, &p, options))>=0
) {
/* cp1 case-folds to the code point "length" or to p[length] */
if(U_IS_SURROGATE(c1)) {
if(U_IS_SURROGATE_LEAD(c1)) {
/* advance beyond source surrogate pair if it case-folds */
++s1;
} else /* isTrail(c1) */ {
/*
* we got a supplementary code point when hitting its trail surrogate,
* therefore the lead surrogate must have been the same as in the other string;
* compare this decomposition with the lead surrogate in the other string
* remember that this simulates bulk text replacement:
* the decomposition would replace the entire code point
*/
--s2;
c2=*(s2-1);
}
}
/* push current level pointers */
stack1[0].start=start1;
stack1[0].s=s1;
stack1[0].limit=limit1;
++level1;
/* copy the folding result to fold1[] */
if(length<=UCASE_MAX_STRING_LENGTH) {
u_memcpy(fold1, p, length);
} else {
int32_t i=0;
U16_APPEND_UNSAFE(fold1, i, length);
length=i;
}
/* set next level pointers to case folding */
start1=s1=fold1;
limit1=fold1+length;
/* get ready to read from decomposition, continue with loop */
c1=-1;
continue;
}
if( level2==0 && (options&U_COMPARE_IGNORE_CASE) &&
(length=ucase_toFullFolding(csp, (UChar32)cp2, &p, options))>=0
) {
/* cp2 case-folds to the code point "length" or to p[length] */
if(U_IS_SURROGATE(c2)) {
if(U_IS_SURROGATE_LEAD(c2)) {
/* advance beyond source surrogate pair if it case-folds */
++s2;
} else /* isTrail(c2) */ {
/*
* we got a supplementary code point when hitting its trail surrogate,
* therefore the lead surrogate must have been the same as in the other string;
* compare this decomposition with the lead surrogate in the other string
* remember that this simulates bulk text replacement:
* the decomposition would replace the entire code point
*/
--s1;
c1=*(s1-1);
}
}
/* push current level pointers */
stack2[0].start=start2;
stack2[0].s=s2;
stack2[0].limit=limit2;
++level2;
/* copy the folding result to fold2[] */
if(length<=UCASE_MAX_STRING_LENGTH) {
u_memcpy(fold2, p, length);
} else {
int32_t i=0;
U16_APPEND_UNSAFE(fold2, i, length);
length=i;
}
/* set next level pointers to case folding */
start2=s2=fold2;
limit2=fold2+length;
/* get ready to read from decomposition, continue with loop */
c2=-1;
continue;
}
if( level1<2 && (options&_COMPARE_EQUIV) &&
0!=(p=unorm_getCanonicalDecomposition((UChar32)cp1, decomp1, &length))
) {
/* cp1 decomposes into p[length] */
if(U_IS_SURROGATE(c1)) {
if(U_IS_SURROGATE_LEAD(c1)) {
/* advance beyond source surrogate pair if it decomposes */
++s1;
} else /* isTrail(c1) */ {
/*
* we got a supplementary code point when hitting its trail surrogate,
* therefore the lead surrogate must have been the same as in the other string;
* compare this decomposition with the lead surrogate in the other string
* remember that this simulates bulk text replacement:
* the decomposition would replace the entire code point
*/
--s2;
c2=*(s2-1);
}
}
/* push current level pointers */
stack1[level1].start=start1;
stack1[level1].s=s1;
stack1[level1].limit=limit1;
++level1;
/* set empty intermediate level if skipped */
if(level1<2) {
stack1[level1++].start=NULL;
}
/* set next level pointers to decomposition */
start1=s1=p;
limit1=p+length;
/* get ready to read from decomposition, continue with loop */
c1=-1;
continue;
}
if( level2<2 && (options&_COMPARE_EQUIV) &&
0!=(p=unorm_getCanonicalDecomposition((UChar32)cp2, decomp2, &length))
) {
/* cp2 decomposes into p[length] */
if(U_IS_SURROGATE(c2)) {
if(U_IS_SURROGATE_LEAD(c2)) {
/* advance beyond source surrogate pair if it decomposes */
++s2;
} else /* isTrail(c2) */ {
/*
* we got a supplementary code point when hitting its trail surrogate,
* therefore the lead surrogate must have been the same as in the other string;
* compare this decomposition with the lead surrogate in the other string
* remember that this simulates bulk text replacement:
* the decomposition would replace the entire code point
*/
--s1;
c1=*(s1-1);
}
}
/* push current level pointers */
stack2[level2].start=start2;
stack2[level2].s=s2;
stack2[level2].limit=limit2;
++level2;
/* set empty intermediate level if skipped */
if(level2<2) {
stack2[level2++].start=NULL;
}
/* set next level pointers to decomposition */
start2=s2=p;
limit2=p+length;
/* get ready to read from decomposition, continue with loop */
c2=-1;
continue;
}
/*
* no decomposition/case folding, max level for both sides:
* return difference result
*
* code point order comparison must not just return cp1-cp2
* because when single surrogates are present then the surrogate pairs
* that formed cp1 and cp2 may be from different string indexes
*
* example: { d800 d800 dc01 } vs. { d800 dc00 }, compare at second code units
* c1=d800 cp1=10001 c2=dc00 cp2=10000
* cp1-cp2>0 but c1-c2<0 and in fact in UTF-32 it is { d800 10001 } < { 10000 }
*
* therefore, use same fix-up as in ustring.c/uprv_strCompare()
* except: uprv_strCompare() fetches c=*s while this functions fetches c=*s++
* so we have slightly different pointer/start/limit comparisons here
*/
if(c1>=0xd800 && c2>=0xd800 && (options&U_COMPARE_CODE_POINT_ORDER)) {
/* subtract 0x2800 from BMP code points to make them smaller than supplementary ones */
if(
(c1<=0xdbff && s1!=limit1 && U16_IS_TRAIL(*s1)) ||
(U16_IS_TRAIL(c1) && start1!=(s1-1) && U16_IS_LEAD(*(s1-2)))
) {
/* part of a surrogate pair, leave >=d800 */
} else {
/* BMP code point - may be surrogate code point - make <d800 */
c1-=0x2800;
}
if(
(c2<=0xdbff && s2!=limit2 && U16_IS_TRAIL(*s2)) ||
(U16_IS_TRAIL(c2) && start2!=(s2-1) && U16_IS_LEAD(*(s2-2)))
) {
/* part of a surrogate pair, leave >=d800 */
} else {
/* BMP code point - may be surrogate code point - make <d800 */
c2-=0x2800;
}
}
return c1-c2;
}
}
