UBool IdentifierInfo::containsWithAlternates(const ScriptSet &container, const ScriptSet &containee) const {
if (!container.contains(containee)) {
return FALSE;
}
for (int32_t iter = UHASH_FIRST; ;) {
const UHashElement *hashEl = uhash_nextElement(fScriptSetSet, &iter);
if (hashEl == NULL) {
break;
}
ScriptSet *alternatives = static_cast<ScriptSet *>(hashEl->key.pointer);
if (!container.intersects(*alternatives)) {
return false;
}
}
return true;
}
IdentifierInfo &IdentifierInfo::setIdentifier(const UnicodeString &identifier, UErrorCode &status) {
if (U_FAILURE(status)) {
return *this;
}
*fIdentifier = identifier;
clear();
ScriptSet scriptsForCP;
UChar32 cp;
for (int32_t i = 0; i < identifier.length(); i += U16_LENGTH(cp)) {
cp = identifier.char32At(i);
// Store a representative character for each kind of decimal digit
if (u_charType(cp) == U_DECIMAL_DIGIT_NUMBER) {
// Just store the zero character as a representative for comparison. Unicode guarantees it is cp - value
fNumerics->add(cp - (UChar32)u_getNumericValue(cp));
}
UScriptCode extensions[500];
int32_t extensionsCount = uscript_getScriptExtensions(cp, extensions, UPRV_LENGTHOF(extensions), &status);
if (U_FAILURE(status)) {
return *this;
}
scriptsForCP.resetAll();
for (int32_t j=0; j<extensionsCount; j++) {
scriptsForCP.set(extensions[j], status);
}
scriptsForCP.reset(USCRIPT_COMMON, status);
scriptsForCP.reset(USCRIPT_INHERITED, status);
switch (scriptsForCP.countMembers()) {
case 0: break;
case 1:
// Single script, record it.
fRequiredScripts->Union(scriptsForCP);
break;
default:
if (!fRequiredScripts->intersects(scriptsForCP)
&& !uhash_geti(fScriptSetSet, &scriptsForCP)) {
// If the set hasn't been added already, add it
// (Add a copy, fScriptSetSet takes ownership of the copy.)
uhash_puti(fScriptSetSet, new ScriptSet(scriptsForCP), 1, &status);
}
break;
}
}
// Now make a final pass through ScriptSetSet to remove alternates that came before singles.
// [Kana], [Kana Hira] => [Kana]
// This is relatively infrequent, so doesn't have to be optimized.
// We also compute any commonalities among the alternates.
if (uhash_count(fScriptSetSet) > 0) {
fCommonAmongAlternates->setAll();
for (int32_t it = UHASH_FIRST;;) {
const UHashElement *nextHashEl = uhash_nextElement(fScriptSetSet, &it);
if (nextHashEl == NULL) {
break;
}
ScriptSet *next = static_cast<ScriptSet *>(nextHashEl->key.pointer);
// [Kana], [Kana Hira] => [Kana]
if (fRequiredScripts->intersects(*next)) {
uhash_removeElement(fScriptSetSet, nextHashEl);
} else {
fCommonAmongAlternates->intersect(*next);
// [[Arab Syrc Thaa]; [Arab Syrc]] => [[Arab Syrc]]
for (int32_t otherIt = UHASH_FIRST;;) {
const UHashElement *otherHashEl = uhash_nextElement(fScriptSetSet, &otherIt);
if (otherHashEl == NULL) {
break;
}
ScriptSet *other = static_cast<ScriptSet *>(otherHashEl->key.pointer);
if (next != other && next->contains(*other)) {
uhash_removeElement(fScriptSetSet, nextHashEl);
break;
}
}
}
}
}
if (uhash_count(fScriptSetSet) == 0) {
fCommonAmongAlternates->resetAll();
}
return *this;
}