void
RuleBasedCollator::checkOwned() {
if (!(dataIsOwned || isWriteThroughAlias)) {
UErrorCode status = U_ZERO_ERROR;
ucollator = ucol_safeClone(ucollator, NULL, NULL, &status);
setRuleStringFromCollator();
dataIsOwned = TRUE;
isWriteThroughAlias = FALSE;
}
}
// not aliasing, not write-through
void
RuleBasedCollator::construct(const UnicodeString& rules,
UColAttributeValue collationStrength,
UColAttributeValue decompositionMode,
UErrorCode& status)
{
urulestring = 0;
ucollator = ucol_openRules(rules.getBuffer(), rules.length(),
decompositionMode, collationStrength,
NULL, &status);
dataIsOwned = TRUE; // since we own a collator now, we need to get rid of it
isWriteThroughAlias = FALSE;
setRuleStringFromCollator(status);
}
RuleBasedCollator::RuleBasedCollator(const Locale& desiredLocale,
UErrorCode& status)
: dataIsOwned(FALSE), isWriteThroughAlias(FALSE), ucollator(NULL)
{
if (U_FAILURE(status))
return;
/*
Try to load, in order:
1. The desired locale's collation.
2. A fallback of the desired locale.
3. The default locale's collation.
4. A fallback of the default locale.
5. The default collation rules, which contains en_US collation rules.
To reiterate, we try:
Specific:
language+country+variant
language+country
language
Default:
language+country+variant
language+country
language
Root: (aka DEFAULTRULES)
steps 1-5 are handled by resource bundle fallback mechanism.
however, in a very unprobable situation that no resource bundle
data exists, step 5 is repeated with hardcoded default rules.
*/
setUCollator(desiredLocale, status);
if (U_FAILURE(status))
{
status = U_ZERO_ERROR;
setUCollator(kRootLocaleName, status);
if (status == U_ZERO_ERROR) {
status = U_USING_DEFAULT_WARNING;
}
}
if (U_SUCCESS(status))
{
setRuleStringFromCollator();
}
}
Collator* RuleBasedCollator::safeClone(void)
{
UErrorCode intStatus = U_ZERO_ERROR;
int32_t buffersize = U_COL_SAFECLONE_BUFFERSIZE;
UCollator *ucol = ucol_safeClone(ucollator, NULL, &buffersize,
&intStatus);
if (U_FAILURE(intStatus)) {
return NULL;
}
RuleBasedCollator *result = new RuleBasedCollator();
// Null pointer check
if (result != NULL) {
result->ucollator = ucol;
result->dataIsOwned = TRUE;
result->isWriteThroughAlias = FALSE;
setRuleStringFromCollator();
}
return result;
}
// not aliasing, not write-through
void
RuleBasedCollator::construct(const UnicodeString& rules,
UColAttributeValue collationStrength,
UColAttributeValue decompositionMode,
UErrorCode& status)
{
ucollator = ucol_openRules(rules.getBuffer(), rules.length(),
decompositionMode, collationStrength,
NULL, &status);
dataIsOwned = TRUE; // since we own a collator now, we need to get rid of it
isWriteThroughAlias = FALSE;
if(ucollator == NULL) {
if(U_SUCCESS(status)) {
status = U_MEMORY_ALLOCATION_ERROR;
}
return; // Failure
}
setRuleStringFromCollator();
}
// aliasing, not write-through
RuleBasedCollator& RuleBasedCollator::operator=(const RuleBasedCollator& that)
{
if (this != &that)
{
if (dataIsOwned)
{
ucol_close(ucollator);
}
urulestring.truncate(0); // empty the rule string
dataIsOwned = TRUE;
isWriteThroughAlias = FALSE;
UErrorCode intStatus = U_ZERO_ERROR;
int32_t buffersize = U_COL_SAFECLONE_BUFFERSIZE;
ucollator = ucol_safeClone(that.ucollator, NULL, &buffersize,
&intStatus);
if (U_SUCCESS(intStatus)) {
setRuleStringFromCollator();
}
}
return *this;
}
