UConverter *
ucnv_createAlgorithmicConverter(UConverter *myUConverter,
UConverterType type,
const char *locale, uint32_t options,
UErrorCode *err) {
UConverter *cnv;
const UConverterSharedData *sharedData;
UBool isAlgorithmicConverter;
UTRACE_ENTRY_OC(UTRACE_UCNV_OPEN_ALGORITHMIC);
UTRACE_DATA1(UTRACE_OPEN_CLOSE, "open algorithmic converter type %d", (int32_t)type);
if(type<0 || UCNV_NUMBER_OF_SUPPORTED_CONVERTER_TYPES<=type) {
*err = U_ILLEGAL_ARGUMENT_ERROR;
UTRACE_EXIT_STATUS(U_ILLEGAL_ARGUMENT_ERROR);
return NULL;
}
sharedData = converterData[type];
umtx_lock(&cnvCacheMutex);
isAlgorithmicConverter = (UBool)(sharedData == NULL || sharedData->referenceCounter != ~0);
umtx_unlock(&cnvCacheMutex);
if (isAlgorithmicConverter) {
/* not a valid type, or not an algorithmic converter */
*err = U_ILLEGAL_ARGUMENT_ERROR;
UTRACE_EXIT_STATUS(U_ILLEGAL_ARGUMENT_ERROR);
return NULL;
}
cnv = ucnv_createConverterFromSharedData(myUConverter, (UConverterSharedData *)sharedData, "",
locale != NULL ? locale : "", options, err);
UTRACE_EXIT_PTR_STATUS(cnv, *err);
return cnv;
}
UConverter *
ucnv_createConverter(UConverter *myUConverter, const char *converterName, UErrorCode * err)
{
UConverterLookupData stackLookup;
UConverterSharedData *mySharedConverterData;
UTRACE_ENTRY_OC(UTRACE_UCNV_OPEN);
if(U_SUCCESS(*err)) {
UTRACE_DATA1(UTRACE_OPEN_CLOSE, "open converter %s", converterName);
mySharedConverterData = ucnv_loadSharedData(converterName, &stackLookup, err);
if(U_SUCCESS(*err)) {
myUConverter = ucnv_createConverterFromSharedData(
myUConverter, mySharedConverterData,
stackLookup.realName, stackLookup.locale, stackLookup.options,
err);
if(U_SUCCESS(*err)) {
UTRACE_EXIT_PTR_STATUS(myUConverter, *err);
return myUConverter;
} else {
ucnv_unloadSharedDataIfReady(mySharedConverterData);
}
}
}
/* exit with error */
UTRACE_EXIT_STATUS(*err);
return NULL;
}
U_CAPI void U_EXPORT2
ucol_close(UCollator *coll)
{
UTRACE_ENTRY_OC(UTRACE_UCOL_CLOSE);
UTRACE_DATA1(UTRACE_INFO, "coll = %p", coll);
if(coll != NULL) {
delete Collator::fromUCollator(coll);
}
UTRACE_EXIT();
}
U_CAPI UCollator*
ucol_open(const char *loc,
UErrorCode *status)
{
U_NAMESPACE_USE
UTRACE_ENTRY_OC(UTRACE_UCOL_OPEN);
UTRACE_DATA1(UTRACE_INFO, "locale = \"%s\"", loc);
UCollator *result = NULL;
u_init(status);
#if !UCONFIG_NO_SERVICE
result = Collator::createUCollator(loc, status);
if (result == NULL)
#endif
{
result = ucol_open_internal(loc, status);
}
UTRACE_EXIT_PTR_STATUS(result, *status);
return result;
}
U_CAPI UCollator* U_EXPORT2
ucol_openFromShortString( const char *definition,
UBool forceDefaults,
UParseError *parseError,
UErrorCode *status)
{
UTRACE_ENTRY_OC(UTRACE_UCOL_OPEN_FROM_SHORT_STRING);
UTRACE_DATA1(UTRACE_INFO, "short string = \"%s\"", definition);
if(U_FAILURE(*status)) return 0;
UParseError internalParseError;
if(!parseError) {
parseError = &internalParseError;
}
parseError->line = 0;
parseError->offset = 0;
parseError->preContext[0] = 0;
parseError->postContext[0] = 0;
// first we want to pick stuff out of short string.
// we'll end up with an UCA version, locale and a bunch of
// settings
// analyse the string in order to get everything we need.
const char *string = definition;
CollatorSpec s;
ucol_sit_initCollatorSpecs(&s);
string = ucol_sit_readSpecs(&s, definition, parseError, status);
ucol_sit_calculateWholeLocale(&s);
char buffer[internalBufferSize];
uprv_memset(buffer, 0, internalBufferSize);
uloc_canonicalize(s.locale, buffer, internalBufferSize, status);
UCollator *result = ucol_open(buffer, status);
int32_t i = 0;
for(i = 0; i < UCOL_ATTRIBUTE_COUNT; i++) {
if(s.options[i] != UCOL_DEFAULT) {
if(forceDefaults || ucol_getAttribute(result, (UColAttribute)i, status) != s.options[i]) {
ucol_setAttribute(result, (UColAttribute)i, s.options[i], status);
}
if(U_FAILURE(*status)) {
parseError->offset = (int32_t)(string - definition);
ucol_close(result);
return NULL;
}
}
}
if(s.variableTopSet) {
if(s.variableTopString[0]) {
ucol_setVariableTop(result, s.variableTopString, s.variableTopStringLen, status);
} else { // we set by value, using 'B'
ucol_restoreVariableTop(result, s.variableTopValue, status);
}
}
if(U_FAILURE(*status)) { // here it can only be a bogus value
ucol_close(result);
result = NULL;
}
UTRACE_EXIT_PTR_STATUS(result, *status);
return result;
}
/*Frees all shared immutable objects that aren't referred to (reference count = 0)
*/
U_CAPI int32_t U_EXPORT2
ucnv_flushCache ()
{
UConverterSharedData *mySharedData = NULL;
int32_t pos;
int32_t tableDeletedNum = 0;
const UHashElement *e;
UErrorCode status = U_ILLEGAL_ARGUMENT_ERROR;
int32_t i, remaining;
UTRACE_ENTRY_OC(UTRACE_UCNV_FLUSH_CACHE);
/* Close the default converter without creating a new one so that everything will be flushed. */
ucnv_close(u_getDefaultConverter(&status));
/*if shared data hasn't even been lazy evaluated yet
* return 0
*/
if (SHARED_DATA_HASHTABLE == NULL) {
UTRACE_EXIT_VALUE((int32_t)0);
return 0;
}
/*creates an enumeration to iterate through every element in the
* table
*
* Synchronization: holding cnvCacheMutex will prevent any other thread from
* accessing or modifying the hash table during the iteration.
* The reference count of an entry may be decremented by
* ucnv_close while the iteration is in process, but this is
* benign. It can't be incremented (in ucnv_createConverter())
* because the sequence of looking up in the cache + incrementing
* is protected by cnvCacheMutex.
*/
umtx_lock(&cnvCacheMutex);
/*
* double loop: A delta/extension-only converter has a pointer to its base table's
* shared data; the first iteration of the outer loop may see the delta converter
* before the base converter, and unloading the delta converter may get the base
* converter's reference counter down to 0.
*/
i = 0;
do {
remaining = 0;
pos = -1;
while ((e = uhash_nextElement (SHARED_DATA_HASHTABLE, &pos)) != NULL)
{
mySharedData = (UConverterSharedData *) e->value.pointer;
/*deletes only if reference counter == 0 */
if (mySharedData->referenceCounter == 0)
{
tableDeletedNum++;
UCNV_DEBUG_LOG("del",mySharedData->staticData->name,mySharedData);
uhash_removeElement(SHARED_DATA_HASHTABLE, e);
mySharedData->sharedDataCached = FALSE;
ucnv_deleteSharedConverterData (mySharedData);
} else {
++remaining;
}
}
} while(++i == 1 && remaining > 0);
umtx_unlock(&cnvCacheMutex);
UTRACE_DATA1(UTRACE_INFO, "ucnv_flushCache() exits with %d converters remaining", remaining);
ucnv_io_flushAvailableConverterCache();
UTRACE_EXIT_VALUE(tableDeletedNum);
return tableDeletedNum;
}