The Tor Browser: intl/icu/source/i18n/transreg.cpp@fc2d59ddac77 (annotated)

intl/icu/source/i18n/transreg.cpp@fc2d59ddac77 (annotated)

intl/icu/source/i18n/transreg.cpp

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
 **********************************************************************
 *   Copyright (c) 2001-2011, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 *   Date        Name        Description
 *   08/10/2001  aliu        Creation.
 **********************************************************************
 */
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_TRANSLITERATION
 #include "unicode/translit.h"
 #include "unicode/resbund.h"
 #include "unicode/uniset.h"
 #include "unicode/uscript.h"
 #include "rbt.h"
 #include "cpdtrans.h"
 #include "nultrans.h"
 #include "transreg.h"
 #include "rbt_data.h"
 #include "rbt_pars.h"
 #include "tridpars.h"
 #include "charstr.h"
 #include "uassert.h"
 #include "locutil.h"
 // Enable the following symbol to add debugging code that tracks the
 // allocation, deletion, and use of Entry objects.  BoundsChecker has
 // reported dangling pointer errors with these objects, but I have
 // been unable to confirm them.  I suspect BoundsChecker is getting
 // confused with pointers going into and coming out of a UHashtable,
 // despite the hinting code that is designed to help it.
 // #define DEBUG_MEM
 #ifdef DEBUG_MEM
 #include <stdio.h>
 #endif
 // UChar constants
 static const UChar LOCALE_SEP  = 95; // '_'
 //static const UChar ID_SEP      = 0x002D; /*-*/
 //static const UChar VARIANT_SEP = 0x002F; // '/'
 // String constants
 static const UChar ANY[] = { 65, 110, 121, 0 }; // Any
 // empty string
 #define NO_VARIANT UnicodeString()
 /**
  * Resource bundle key for the RuleBasedTransliterator rule.
  */
 //static const char RB_RULE[] = "Rule";
 U_NAMESPACE_BEGIN
 //------------------------------------------------------------------
 // Alias
 //------------------------------------------------------------------
 TransliteratorAlias::TransliteratorAlias(const UnicodeString& theAliasID,
                                          const UnicodeSet* cpdFilter) :
     ID(),
     aliasesOrRules(theAliasID),
     transes(0),
     compoundFilter(cpdFilter),
     direction(UTRANS_FORWARD),
     type(TransliteratorAlias::SIMPLE) {
 }
 TransliteratorAlias::TransliteratorAlias(const UnicodeString& theID,
                                          const UnicodeString& idBlocks,
                                          UVector* adoptedTransliterators,
                                          const UnicodeSet* cpdFilter) :
     ID(theID),
     aliasesOrRules(idBlocks),
     transes(adoptedTransliterators),
     compoundFilter(cpdFilter),
     direction(UTRANS_FORWARD),
     type(TransliteratorAlias::COMPOUND) {
 }
 TransliteratorAlias::TransliteratorAlias(const UnicodeString& theID,
                                          const UnicodeString& rules,
                                          UTransDirection dir) :
     ID(theID),
     aliasesOrRules(rules),
     transes(0),
     compoundFilter(0),
     direction(dir),
     type(TransliteratorAlias::RULES) {
 }
 TransliteratorAlias::~TransliteratorAlias() {
     delete transes;
 }
 Transliterator* TransliteratorAlias::create(UParseError& pe,
                                             UErrorCode& ec) {
     if (U_FAILURE(ec)) {
         return 0;
     }
     Transliterator *t = NULL;
     switch (type) {
     case SIMPLE:
         t = Transliterator::createInstance(aliasesOrRules, UTRANS_FORWARD, pe, ec);
         if(U_FAILURE(ec)){
             return 0;
         }
         if (compoundFilter != 0)
             t->adoptFilter((UnicodeSet*)compoundFilter->clone());
         break;
     case COMPOUND:
         {
             // the total number of transliterators in the compound is the total number of anonymous transliterators
             // plus the total number of ID blocks-- we start by assuming the list begins and ends with an ID
             // block and that each pair anonymous transliterators has an ID block between them.  Then we go back
             // to see whether there really are ID blocks at the beginning and end (by looking for U+FFFF, which
             // marks the position where an anonymous transliterator goes) and adjust accordingly
             int32_t anonymousRBTs = transes->size();
             int32_t transCount = anonymousRBTs * 2 + 1;
             if (!aliasesOrRules.isEmpty() && aliasesOrRules[0] == (UChar)(0xffff))
                 --transCount;
             if (aliasesOrRules.length() >= 2 && aliasesOrRules[aliasesOrRules.length() - 1] == (UChar)(0xffff))
                 --transCount;
             UnicodeString noIDBlock((UChar)(0xffff));
             noIDBlock += ((UChar)(0xffff));
             int32_t pos = aliasesOrRules.indexOf(noIDBlock);
             while (pos >= 0) {
                 --transCount;
                 pos = aliasesOrRules.indexOf(noIDBlock, pos + 1);
             }
             UVector transliterators(ec);
             UnicodeString idBlock;
             int32_t blockSeparatorPos = aliasesOrRules.indexOf((UChar)(0xffff));
             while (blockSeparatorPos >= 0) {
                 aliasesOrRules.extract(0, blockSeparatorPos, idBlock);
                 aliasesOrRules.remove(0, blockSeparatorPos + 1);
                 if (!idBlock.isEmpty())
                     transliterators.addElement(Transliterator::createInstance(idBlock, UTRANS_FORWARD, pe, ec), ec);
                 if (!transes->isEmpty())
                     transliterators.addElement(transes->orphanElementAt(0), ec);
                 blockSeparatorPos = aliasesOrRules.indexOf((UChar)(0xffff));
             }
             if (!aliasesOrRules.isEmpty())
                 transliterators.addElement(Transliterator::createInstance(aliasesOrRules, UTRANS_FORWARD, pe, ec), ec);
             while (!transes->isEmpty())
                 transliterators.addElement(transes->orphanElementAt(0), ec);
             if (U_SUCCESS(ec)) {
                 t = new CompoundTransliterator(ID, transliterators,
                     (compoundFilter ? (UnicodeSet*)(compoundFilter->clone()) : 0),
                     anonymousRBTs, pe, ec);
                 if (t == 0) {
                     ec = U_MEMORY_ALLOCATION_ERROR;
                     return 0;
                 }
             } else {
                 for (int32_t i = 0; i < transliterators.size(); i++)
                     delete (Transliterator*)(transliterators.elementAt(i));
             }
         }
         break;
     case RULES:
         U_ASSERT(FALSE); // don't call create() if isRuleBased() returns TRUE!
         break;
     }
     return t;
 }
 UBool TransliteratorAlias::isRuleBased() const {
     return type == RULES;
 }
 void TransliteratorAlias::parse(TransliteratorParser& parser,
                                 UParseError& pe, UErrorCode& ec) const {
     U_ASSERT(type == RULES);
     if (U_FAILURE(ec)) {
         return;
     }
     parser.parse(aliasesOrRules, direction, pe, ec);
 }
 //----------------------------------------------------------------------
 // class TransliteratorSpec
 //----------------------------------------------------------------------
 /**
  * A TransliteratorSpec is a string specifying either a source or a target.  In more
  * general terms, it may also specify a variant, but we only use the
  * Spec class for sources and targets.
  *
  * A Spec may be a locale or a script.  If it is a locale, it has a
  * fallback chain that goes xx_YY_ZZZ -> xx_YY -> xx -> ssss, where
  * ssss is the script mapping of xx_YY_ZZZ.  The Spec API methods
  * hasFallback(), next(), and reset() iterate over this fallback
  * sequence.
  *
  * The Spec class canonicalizes itself, so the locale is put into
  * canonical form, or the script is transformed from an abbreviation
  * to a full name.
  */
 class TransliteratorSpec : public UMemory {
  public:
     TransliteratorSpec(const UnicodeString& spec);
     ~TransliteratorSpec();
     const UnicodeString& get() const;
     UBool hasFallback() const;
     const UnicodeString& next();
     void reset();
     UBool isLocale() const;
     ResourceBundle& getBundle() const;
     operator const UnicodeString&() const { return get(); }
     const UnicodeString& getTop() const { return top; }
  private:
     void setupNext();
     UnicodeString top;
     UnicodeString spec;
     UnicodeString nextSpec;
     UnicodeString scriptName;
     UBool isSpecLocale; // TRUE if spec is a locale
     UBool isNextLocale; // TRUE if nextSpec is a locale
     ResourceBundle* res;
     TransliteratorSpec(const TransliteratorSpec &other); // forbid copying of this class
     TransliteratorSpec &operator=(const TransliteratorSpec &other); // forbid copying of this class
 };
 TransliteratorSpec::TransliteratorSpec(const UnicodeString& theSpec)
 : top(theSpec),
   res(0)
 {
     UErrorCode status = U_ZERO_ERROR;
     Locale topLoc("");
     LocaleUtility::initLocaleFromName(theSpec, topLoc);
     if (!topLoc.isBogus()) {
         res = new ResourceBundle(U_ICUDATA_TRANSLIT, topLoc, status);
         /* test for NULL */
         if (res == 0) {
             return;
         }
         if (U_FAILURE(status) || status == U_USING_DEFAULT_WARNING) {
             delete res;
             res = 0;
         }
     }
     // Canonicalize script name -or- do locale->script mapping
     status = U_ZERO_ERROR;
     static const int32_t capacity = 10;
     UScriptCode script[capacity]={USCRIPT_INVALID_CODE};
     int32_t num = uscript_getCode(CharString().appendInvariantChars(theSpec, status).data(),
                                   script, capacity, &status);
     if (num > 0 && script[0] != USCRIPT_INVALID_CODE) {
         scriptName = UnicodeString(uscript_getName(script[0]), -1, US_INV);
     }
     // Canonicalize top
     if (res != 0) {
         // Canonicalize locale name
         UnicodeString locStr;
         LocaleUtility::initNameFromLocale(topLoc, locStr);
         if (!locStr.isBogus()) {
             top = locStr;
         }
     } else if (scriptName.length() != 0) {
         // We are a script; use canonical name
         top = scriptName;
     }
     // assert(spec != top);
     reset();
 }
 TransliteratorSpec::~TransliteratorSpec() {
     delete res;
 }
 UBool TransliteratorSpec::hasFallback() const {
     return nextSpec.length() != 0;
 }
 void TransliteratorSpec::reset() {
     if (spec != top) {
         spec = top;
         isSpecLocale = (res != 0);
         setupNext();
     }
 }
 void TransliteratorSpec::setupNext() {
     isNextLocale = FALSE;
     if (isSpecLocale) {
         nextSpec = spec;
         int32_t i = nextSpec.lastIndexOf(LOCALE_SEP);
         // If i == 0 then we have _FOO, so we fall through
         // to the scriptName.
         if (i > 0) {
             nextSpec.truncate(i);
             isNextLocale = TRUE;
         } else {
             nextSpec = scriptName; // scriptName may be empty
         }
     } else {
         // spec is a script, so we are at the end
         nextSpec.truncate(0);
     }
 }
 // Protocol:
 // for(const UnicodeString& s(spec.get());
 //     spec.hasFallback(); s(spec.next())) { ...
 const UnicodeString& TransliteratorSpec::next() {
     spec = nextSpec;
     isSpecLocale = isNextLocale;
     setupNext();
     return spec;
 }
 const UnicodeString& TransliteratorSpec::get() const {
     return spec;
 }
 UBool TransliteratorSpec::isLocale() const {
     return isSpecLocale;
 }
 ResourceBundle& TransliteratorSpec::getBundle() const {
     return *res;
 }
 //----------------------------------------------------------------------
 #ifdef DEBUG_MEM
 // Vector of Entry pointers currently in use
 static UVector* DEBUG_entries = NULL;
 static void DEBUG_setup() {
     if (DEBUG_entries == NULL) {
         UErrorCode ec = U_ZERO_ERROR;
         DEBUG_entries = new UVector(ec);
     }
 }
 // Caller must call DEBUG_setup first.  Return index of given Entry,
 // if it is in use (not deleted yet), or -1 if not found.
 static int DEBUG_findEntry(TransliteratorEntry* e) {
     for (int i=0; i<DEBUG_entries->size(); ++i) {
         if (e == (TransliteratorEntry*) DEBUG_entries->elementAt(i)) {
             return i;
         }
     }
     return -1;
 }
 // Track object creation
 static void DEBUG_newEntry(TransliteratorEntry* e) {
     DEBUG_setup();
     if (DEBUG_findEntry(e) >= 0) {
         // This should really never happen unless the heap is broken
         printf("ERROR DEBUG_newEntry duplicate new pointer %08X\n", e);
         return;
     }
     UErrorCode ec = U_ZERO_ERROR;
     DEBUG_entries->addElement(e, ec);
 }
 // Track object deletion
 static void DEBUG_delEntry(TransliteratorEntry* e) {
     DEBUG_setup();
     int i = DEBUG_findEntry(e);
     if (i < 0) {
         printf("ERROR DEBUG_delEntry possible double deletion %08X\n", e);
         return;
     }
     DEBUG_entries->removeElementAt(i);
 }
 // Track object usage
 static void DEBUG_useEntry(TransliteratorEntry* e) {
     if (e == NULL) return;
     DEBUG_setup();
     int i = DEBUG_findEntry(e);
     if (i < 0) {
         printf("ERROR DEBUG_useEntry possible dangling pointer %08X\n", e);
     }
 }
 #else
 // If we're not debugging then make these macros into NOPs
 #define DEBUG_newEntry(x)
 #define DEBUG_delEntry(x)
 #define DEBUG_useEntry(x)
 #endif
 //----------------------------------------------------------------------
 // class Entry
 //----------------------------------------------------------------------
 /**
  * The Entry object stores objects of different types and
  * singleton objects as placeholders for rule-based transliterators to
  * be built as needed.  Instances of this struct can be placeholders,
  * can represent prototype transliterators to be cloned, or can
  * represent TransliteratorData objects.  We don't support storing
  * classes in the registry because we don't have the rtti infrastructure
  * for it.  We could easily add this if there is a need for it in the
  * future.
  */
 class TransliteratorEntry : public UMemory {
 public:
     enum Type {
         RULES_FORWARD,
         RULES_REVERSE,
         LOCALE_RULES,
         PROTOTYPE,
         RBT_DATA,
         COMPOUND_RBT,
         ALIAS,
         FACTORY,
         NONE // Only used for uninitialized entries
     } entryType;
     // NOTE: stringArg cannot go inside the union because
     // it has a copy constructor
     UnicodeString stringArg; // For RULES_*, ALIAS, COMPOUND_RBT
     int32_t intArg; // For COMPOUND_RBT, LOCALE_RULES
     UnicodeSet* compoundFilter; // For COMPOUND_RBT
     union {
         Transliterator* prototype; // For PROTOTYPE
         TransliterationRuleData* data; // For RBT_DATA
         UVector* dataVector;    // For COMPOUND_RBT
         struct {
             Transliterator::Factory function;
             Transliterator::Token   context;
         } factory; // For FACTORY
     } u;
     TransliteratorEntry();
     ~TransliteratorEntry();
     void adoptPrototype(Transliterator* adopted);
     void setFactory(Transliterator::Factory factory,
                     Transliterator::Token context);
 private:
     TransliteratorEntry(const TransliteratorEntry &other); // forbid copying of this class
     TransliteratorEntry &operator=(const TransliteratorEntry &other); // forbid copying of this class
 };
 TransliteratorEntry::TransliteratorEntry() {
     u.prototype = 0;
     compoundFilter = NULL;
     entryType = NONE;
     DEBUG_newEntry(this);
 }
 TransliteratorEntry::~TransliteratorEntry() {
     DEBUG_delEntry(this);
     if (entryType == PROTOTYPE) {
         delete u.prototype;
     } else if (entryType == RBT_DATA) {
         // The data object is shared between instances of RBT.  The
         // entry object owns it.  It should only be deleted when the
         // transliterator component is being cleaned up.  Doing so
         // invalidates any RBTs that the user has instantiated.
         delete u.data;
     } else if (entryType == COMPOUND_RBT) {
         while (u.dataVector != NULL && !u.dataVector->isEmpty())
             delete (TransliterationRuleData*)u.dataVector->orphanElementAt(0);
         delete u.dataVector;
     }
     delete compoundFilter;
 }
 void TransliteratorEntry::adoptPrototype(Transliterator* adopted) {
     if (entryType == PROTOTYPE) {
         delete u.prototype;
     }
     entryType = PROTOTYPE;
     u.prototype = adopted;
 }
 void TransliteratorEntry::setFactory(Transliterator::Factory factory,
                        Transliterator::Token context) {
     if (entryType == PROTOTYPE) {
         delete u.prototype;
     }
     entryType = FACTORY;
     u.factory.function = factory;
     u.factory.context = context;
 }
 // UObjectDeleter for Hashtable::setValueDeleter
 U_CDECL_BEGIN
 static void U_CALLCONV
 deleteEntry(void* obj) {
     delete (TransliteratorEntry*) obj;
 }
 U_CDECL_END
 //----------------------------------------------------------------------
 // class TransliteratorRegistry: Basic public API
 //----------------------------------------------------------------------
 TransliteratorRegistry::TransliteratorRegistry(UErrorCode& status) :
     registry(TRUE, status),
     specDAG(TRUE, status),
     availableIDs(status)
 {
     registry.setValueDeleter(deleteEntry);
     availableIDs.setDeleter(uprv_deleteUObject);
     availableIDs.setComparer(uhash_compareCaselessUnicodeString);
     specDAG.setValueDeleter(uhash_deleteHashtable);
 }
 TransliteratorRegistry::~TransliteratorRegistry() {
     // Through the magic of C++, everything cleans itself up
 }
 Transliterator* TransliteratorRegistry::get(const UnicodeString& ID,
                                             TransliteratorAlias*& aliasReturn,
                                             UErrorCode& status) {
     U_ASSERT(aliasReturn == NULL);
     TransliteratorEntry *entry = find(ID);
     return (entry == 0) ? 0
         : instantiateEntry(ID, entry, aliasReturn, status);
 }
 Transliterator* TransliteratorRegistry::reget(const UnicodeString& ID,
                                               TransliteratorParser& parser,
                                               TransliteratorAlias*& aliasReturn,
                                               UErrorCode& status) {
     U_ASSERT(aliasReturn == NULL);
     TransliteratorEntry *entry = find(ID);
     if (entry == 0) {
         // We get to this point if there are two threads, one of which
         // is instantiating an ID, and another of which is removing
         // the same ID from the registry, and the timing is just right.
         return 0;
     }
     // The usage model for the caller is that they will first call
     // reg->get() inside the mutex, they'll get back an alias, they call
     // alias->isRuleBased(), and if they get TRUE, they call alias->parse()
     // outside the mutex, then reg->reget() inside the mutex again.  A real
     // mess, but it gets things working for ICU 3.0. [alan].
     // Note: It's possible that in between the caller calling
     // alias->parse() and reg->reget(), that another thread will have
     // called reg->reget(), and the entry will already have been fixed up.
     // We have to detect this so we don't stomp over existing entry
     // data members and potentially leak memory (u.data and compoundFilter).
     if (entry->entryType == TransliteratorEntry::RULES_FORWARD ||
         entry->entryType == TransliteratorEntry::RULES_REVERSE ||
         entry->entryType == TransliteratorEntry::LOCALE_RULES) {
         if (parser.idBlockVector.isEmpty() && parser.dataVector.isEmpty()) {
             entry->u.data = 0;
             entry->entryType = TransliteratorEntry::ALIAS;
             entry->stringArg = UNICODE_STRING_SIMPLE("Any-NULL");
         }
         else if (parser.idBlockVector.isEmpty() && parser.dataVector.size() == 1) {
             entry->u.data = (TransliterationRuleData*)parser.dataVector.orphanElementAt(0);
             entry->entryType = TransliteratorEntry::RBT_DATA;
         }
         else if (parser.idBlockVector.size() == 1 && parser.dataVector.isEmpty()) {
             entry->stringArg = *(UnicodeString*)(parser.idBlockVector.elementAt(0));
             entry->compoundFilter = parser.orphanCompoundFilter();
             entry->entryType = TransliteratorEntry::ALIAS;
         }
         else {
             entry->entryType = TransliteratorEntry::COMPOUND_RBT;
             entry->compoundFilter = parser.orphanCompoundFilter();
             entry->u.dataVector = new UVector(status);
             entry->stringArg.remove();
             int32_t limit = parser.idBlockVector.size();
             if (parser.dataVector.size() > limit)
                 limit = parser.dataVector.size();
             for (int32_t i = 0; i < limit; i++) {
                 if (i < parser.idBlockVector.size()) {
                     UnicodeString* idBlock = (UnicodeString*)parser.idBlockVector.elementAt(i);
                     if (!idBlock->isEmpty())
                         entry->stringArg += *idBlock;
                 }
                 if (!parser.dataVector.isEmpty()) {
                     TransliterationRuleData* data = (TransliterationRuleData*)parser.dataVector.orphanElementAt(0);
                     entry->u.dataVector->addElement(data, status);
                     entry->stringArg += (UChar)0xffff;  // use U+FFFF to mark position of RBTs in ID block
                 }
             }
         }
     }
     Transliterator *t =
         instantiateEntry(ID, entry, aliasReturn, status);
     return t;
 }
 void TransliteratorRegistry::put(Transliterator* adoptedProto,
                                  UBool visible,
                                  UErrorCode& ec)
 {
     TransliteratorEntry *entry = new TransliteratorEntry();
     if (entry == NULL) {
         ec = U_MEMORY_ALLOCATION_ERROR;
         return;
     }
     entry->adoptPrototype(adoptedProto);
     registerEntry(adoptedProto->getID(), entry, visible);
 }
 void TransliteratorRegistry::put(const UnicodeString& ID,
                                  Transliterator::Factory factory,
                                  Transliterator::Token context,
                                  UBool visible,
                                  UErrorCode& ec) {
     TransliteratorEntry *entry = new TransliteratorEntry();
     if (entry == NULL) {
         ec = U_MEMORY_ALLOCATION_ERROR;
         return;
     }
     entry->setFactory(factory, context);
     registerEntry(ID, entry, visible);
 }
 void TransliteratorRegistry::put(const UnicodeString& ID,
                                  const UnicodeString& resourceName,
                                  UTransDirection dir,
                                  UBool readonlyResourceAlias,
                                  UBool visible,
                                  UErrorCode& ec) {
     TransliteratorEntry *entry = new TransliteratorEntry();
     if (entry == NULL) {
         ec = U_MEMORY_ALLOCATION_ERROR;
         return;
     }
     entry->entryType = (dir == UTRANS_FORWARD) ? TransliteratorEntry::RULES_FORWARD
         : TransliteratorEntry::RULES_REVERSE;
     if (readonlyResourceAlias) {
         entry->stringArg.setTo(TRUE, resourceName.getBuffer(), -1);
     }
     else {
         entry->stringArg = resourceName;
     }
     registerEntry(ID, entry, visible);
 }
 void TransliteratorRegistry::put(const UnicodeString& ID,
                                  const UnicodeString& alias,
                                  UBool readonlyAliasAlias,
                                  UBool visible,
                                  UErrorCode& /*ec*/) {
     TransliteratorEntry *entry = new TransliteratorEntry();
     // Null pointer check
     if (entry != NULL) {
         entry->entryType = TransliteratorEntry::ALIAS;
         if (readonlyAliasAlias) {
             entry->stringArg.setTo(TRUE, alias.getBuffer(), -1);
         }
         else {
             entry->stringArg = alias;
         }
         registerEntry(ID, entry, visible);
     }
 }
 void TransliteratorRegistry::remove(const UnicodeString& ID) {
     UnicodeString source, target, variant;
     UBool sawSource;
     TransliteratorIDParser::IDtoSTV(ID, source, target, variant, sawSource);
     // Only need to do this if ID.indexOf('-') < 0
     UnicodeString id;
     TransliteratorIDParser::STVtoID(source, target, variant, id);
     registry.remove(id);
     removeSTV(source, target, variant);
     availableIDs.removeElement((void*) &id);
 }
 //----------------------------------------------------------------------
 // class TransliteratorRegistry: Public ID and spec management
 //----------------------------------------------------------------------
 /**
  * == OBSOLETE - remove in ICU 3.4 ==
  * Return the number of IDs currently registered with the system.
  * To retrieve the actual IDs, call getAvailableID(i) with
  * i from 0 to countAvailableIDs() - 1.
  */
 int32_t TransliteratorRegistry::countAvailableIDs(void) const {
     return availableIDs.size();
 }
 /**
  * == OBSOLETE - remove in ICU 3.4 ==
  * Return the index-th available ID.  index must be between 0
  * and countAvailableIDs() - 1, inclusive.  If index is out of
  * range, the result of getAvailableID(0) is returned.
  */
 const UnicodeString& TransliteratorRegistry::getAvailableID(int32_t index) const {
     if (index < 0 || index >= availableIDs.size()) {
         index = 0;
     }
     return *(const UnicodeString*) availableIDs[index];
 }
 StringEnumeration* TransliteratorRegistry::getAvailableIDs() const {
     return new Enumeration(*this);
 }
 int32_t TransliteratorRegistry::countAvailableSources(void) const {
     return specDAG.count();
 }
 UnicodeString& TransliteratorRegistry::getAvailableSource(int32_t index,
                                                           UnicodeString& result) const {
     int32_t pos = -1;
     const UHashElement *e = 0;
     while (index-- >= 0) {
         e = specDAG.nextElement(pos);
         if (e == 0) {
             break;
         }
     }
     if (e == 0) {
         result.truncate(0);
     } else {
         result = *(UnicodeString*) e->key.pointer;
     }
     return result;
 }
 int32_t TransliteratorRegistry::countAvailableTargets(const UnicodeString& source) const {
     Hashtable *targets = (Hashtable*) specDAG.get(source);
     return (targets == 0) ? 0 : targets->count();
 }
 UnicodeString& TransliteratorRegistry::getAvailableTarget(int32_t index,
                                                           const UnicodeString& source,
                                                           UnicodeString& result) const {
     Hashtable *targets = (Hashtable*) specDAG.get(source);
     if (targets == 0) {
         result.truncate(0); // invalid source
         return result;
     }
     int32_t pos = -1;
     const UHashElement *e = 0;
     while (index-- >= 0) {
         e = targets->nextElement(pos);
         if (e == 0) {
             break;
         }
     }
     if (e == 0) {
         result.truncate(0); // invalid index
     } else {
         result = *(UnicodeString*) e->key.pointer;
     }
     return result;
 }
 int32_t TransliteratorRegistry::countAvailableVariants(const UnicodeString& source,
                                                        const UnicodeString& target) const {
     Hashtable *targets = (Hashtable*) specDAG.get(source);
     if (targets == 0) {
         return 0;
     }
     UVector *variants = (UVector*) targets->get(target);
     // variants may be 0 if the source/target are invalid
     return (variants == 0) ? 0 : variants->size();
 }
 UnicodeString& TransliteratorRegistry::getAvailableVariant(int32_t index,
                                                            const UnicodeString& source,
                                                            const UnicodeString& target,
                                                            UnicodeString& result) const {
     Hashtable *targets = (Hashtable*) specDAG.get(source);
     if (targets == 0) {
         result.truncate(0); // invalid source
         return result;
     }
     UVector *variants = (UVector*) targets->get(target);
     if (variants == 0) {
         result.truncate(0); // invalid target
         return result;
     }
     UnicodeString *v = (UnicodeString*) variants->elementAt(index);
     if (v == 0) {
         result.truncate(0); // invalid index
     } else {
         result = *v;
     }
     return result;
 }
 //----------------------------------------------------------------------
 // class TransliteratorRegistry::Enumeration
 //----------------------------------------------------------------------
 TransliteratorRegistry::Enumeration::Enumeration(const TransliteratorRegistry& _reg) :
     index(0), reg(_reg) {
 }
 TransliteratorRegistry::Enumeration::~Enumeration() {
 }
 int32_t TransliteratorRegistry::Enumeration::count(UErrorCode& /*status*/) const {
     return reg.availableIDs.size();
 }
 const UnicodeString* TransliteratorRegistry::Enumeration::snext(UErrorCode& status) {
     // This is sloppy but safe -- if we get out of sync with the underlying
     // registry, we will still return legal strings, but they might not
     // correspond to the snapshot at construction time.  So there could be
     // duplicate IDs or omitted IDs if insertions or deletions occur in one
     // thread while another is iterating.  To be more rigorous, add a timestamp,
     // which is incremented with any modification, and validate this iterator
     // against the timestamp at construction time.  This probably isn't worth
     // doing as long as there is some possibility of removing this code in favor
     // of some new code based on Doug's service framework.
     if (U_FAILURE(status)) {
         return NULL;
     }
     int32_t n = reg.availableIDs.size();
     if (index > n) {
         status = U_ENUM_OUT_OF_SYNC_ERROR;
     }
     // index == n is okay -- this means we've reached the end
     if (index < n) {
         // Copy the string! This avoids lifetime problems.
         unistr = *(const UnicodeString*)reg.availableIDs[index++];
         return &unistr;
     } else {
         return NULL;
     }
 }
 void TransliteratorRegistry::Enumeration::reset(UErrorCode& /*status*/) {
     index = 0;
 }
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(TransliteratorRegistry::Enumeration)
 //----------------------------------------------------------------------
 // class TransliteratorRegistry: internal
 //----------------------------------------------------------------------
 /**
  * Convenience method.  Calls 6-arg registerEntry().
  */
 void TransliteratorRegistry::registerEntry(const UnicodeString& source,
                                            const UnicodeString& target,
                                            const UnicodeString& variant,
                                            TransliteratorEntry* adopted,
                                            UBool visible) {
     UnicodeString ID;
     UnicodeString s(source);
     if (s.length() == 0) {
         s.setTo(TRUE, ANY, 3);
     }
     TransliteratorIDParser::STVtoID(source, target, variant, ID);
     registerEntry(ID, s, target, variant, adopted, visible);
 }
 /**
  * Convenience method.  Calls 6-arg registerEntry().
  */
 void TransliteratorRegistry::registerEntry(const UnicodeString& ID,
                                            TransliteratorEntry* adopted,
                                            UBool visible) {
     UnicodeString source, target, variant;
     UBool sawSource;
     TransliteratorIDParser::IDtoSTV(ID, source, target, variant, sawSource);
     // Only need to do this if ID.indexOf('-') < 0
     UnicodeString id;
     TransliteratorIDParser::STVtoID(source, target, variant, id);
     registerEntry(id, source, target, variant, adopted, visible);
 }
 /**
  * Register an entry object (adopted) with the given ID, source,
  * target, and variant strings.
  */
 void TransliteratorRegistry::registerEntry(const UnicodeString& ID,
                                            const UnicodeString& source,
                                            const UnicodeString& target,
                                            const UnicodeString& variant,
                                            TransliteratorEntry* adopted,
                                            UBool visible) {
     UErrorCode status = U_ZERO_ERROR;
     registry.put(ID, adopted, status);
     if (visible) {
         registerSTV(source, target, variant);
         if (!availableIDs.contains((void*) &ID)) {
             UnicodeString *newID = (UnicodeString *)ID.clone();
             // Check to make sure newID was created.
             if (newID != NULL) {
 	            // NUL-terminate the ID string
 	            newID->getTerminatedBuffer();
 	            availableIDs.addElement(newID, status);
             }
         }
     } else {
         removeSTV(source, target, variant);
         availableIDs.removeElement((void*) &ID);
     }
 }
 /**
  * Register a source-target/variant in the specDAG.  Variant may be
  * empty, but source and target must not be.  If variant is empty then
  * the special variant NO_VARIANT is stored in slot zero of the
  * UVector of variants.
  */
 void TransliteratorRegistry::registerSTV(const UnicodeString& source,
                                          const UnicodeString& target,
                                          const UnicodeString& variant) {
     // assert(source.length() > 0);
     // assert(target.length() > 0);
     UErrorCode status = U_ZERO_ERROR;
     Hashtable *targets = (Hashtable*) specDAG.get(source);
     if (targets == 0) {
         targets = new Hashtable(TRUE, status);
         if (U_FAILURE(status) || targets == 0) {
             return;
         }
         targets->setValueDeleter(uprv_deleteUObject);
         specDAG.put(source, targets, status);
     }
     UVector *variants = (UVector*) targets->get(target);
     if (variants == 0) {
         variants = new UVector(uprv_deleteUObject,
                                uhash_compareCaselessUnicodeString, status);
         if (variants == 0) {
             return;
         }
         targets->put(target, variants, status);
     }
     // assert(NO_VARIANT == "");
     // We add the variant string.  If it is the special "no variant"
     // string, that is, the empty string, we add it at position zero.
     if (!variants->contains((void*) &variant)) {
     	UnicodeString *tempus; // Used for null pointer check.
         if (variant.length() > 0) {
         	tempus = new UnicodeString(variant);
         	if (tempus != NULL) {
         		variants->addElement(tempus, status);
         	}
         } else {
         	tempus = new UnicodeString();  // = NO_VARIANT
         	if (tempus != NULL) {
         		variants->insertElementAt(tempus, 0, status);
         	}
         }
     }
 }
 /**
  * Remove a source-target/variant from the specDAG.
  */
 void TransliteratorRegistry::removeSTV(const UnicodeString& source,
                                        const UnicodeString& target,
                                        const UnicodeString& variant) {
     // assert(source.length() > 0);
     // assert(target.length() > 0);
 //    UErrorCode status = U_ZERO_ERROR;
     Hashtable *targets = (Hashtable*) specDAG.get(source);
     if (targets == 0) {
         return; // should never happen for valid s-t/v
     }
     UVector *variants = (UVector*) targets->get(target);
     if (variants == 0) {
         return; // should never happen for valid s-t/v
     }
     variants->removeElement((void*) &variant);
     if (variants->size() == 0) {
         targets->remove(target); // should delete variants
         if (targets->count() == 0) {
             specDAG.remove(source); // should delete targets
         }
     }
 }
 /**
  * Attempt to find a source-target/variant in the dynamic registry
  * store.  Return 0 on failure.
  *
  * Caller does NOT own returned object.
  */
 TransliteratorEntry* TransliteratorRegistry::findInDynamicStore(const TransliteratorSpec& src,
                                                   const TransliteratorSpec& trg,
                                                   const UnicodeString& variant) const {
     UnicodeString ID;
     TransliteratorIDParser::STVtoID(src, trg, variant, ID);
     TransliteratorEntry *e = (TransliteratorEntry*) registry.get(ID);
     DEBUG_useEntry(e);
     return e;
 }
 /**
  * Attempt to find a source-target/variant in the static locale
  * resource store.  Do not perform fallback.  Return 0 on failure.
  *
  * On success, create a new entry object, register it in the dynamic
  * store, and return a pointer to it, but do not make it public --
  * just because someone requested something, we do not expand the
  * available ID list (or spec DAG).
  *
  * Caller does NOT own returned object.
  */
 TransliteratorEntry* TransliteratorRegistry::findInStaticStore(const TransliteratorSpec& src,
                                                  const TransliteratorSpec& trg,
                                                  const UnicodeString& variant) {
     TransliteratorEntry* entry = 0;
     if (src.isLocale()) {
         entry = findInBundle(src, trg, variant, UTRANS_FORWARD);
     } else if (trg.isLocale()) {
         entry = findInBundle(trg, src, variant, UTRANS_REVERSE);
     }
     // If we found an entry, store it in the Hashtable for next
     // time.
     if (entry != 0) {
         registerEntry(src.getTop(), trg.getTop(), variant, entry, FALSE);
     }
     return entry;
 }
 // As of 2.0, resource bundle keys cannot contain '_'
 static const UChar TRANSLITERATE_TO[] = {84,114,97,110,115,108,105,116,101,114,97,116,101,84,111,0}; // "TransliterateTo"
 static const UChar TRANSLITERATE_FROM[] = {84,114,97,110,115,108,105,116,101,114,97,116,101,70,114,111,109,0}; // "TransliterateFrom"
 static const UChar TRANSLITERATE[] = {84,114,97,110,115,108,105,116,101,114,97,116,101,0}; // "Transliterate"
 /**
  * Attempt to find an entry in a single resource bundle.  This is
  * a one-sided lookup.  findInStaticStore() performs up to two such
  * lookups, one for the source, and one for the target.
  *
  * Do not perform fallback.  Return 0 on failure.
  *
  * On success, create a new Entry object, populate it, and return it.
  * The caller owns the returned object.
  */
 TransliteratorEntry* TransliteratorRegistry::findInBundle(const TransliteratorSpec& specToOpen,
                                             const TransliteratorSpec& specToFind,
                                             const UnicodeString& variant,
                                             UTransDirection direction)
 {
     UnicodeString utag;
     UnicodeString resStr;
     int32_t pass;
     for (pass=0; pass<2; ++pass) {
         utag.truncate(0);
         // First try either TransliteratorTo_xxx or
         // TransliterateFrom_xxx, then try the bidirectional
         // Transliterate_xxx.  This precedence order is arbitrary
         // but must be consistent and documented.
         if (pass == 0) {
             utag.append(direction == UTRANS_FORWARD ?
                         TRANSLITERATE_TO : TRANSLITERATE_FROM, -1);
         } else {
             utag.append(TRANSLITERATE, -1);
         }
         UnicodeString s(specToFind.get());
         utag.append(s.toUpper(""));
         UErrorCode status = U_ZERO_ERROR;
         ResourceBundle subres(specToOpen.getBundle().get(
             CharString().appendInvariantChars(utag, status).data(), status));
         if (U_FAILURE(status) || status == U_USING_DEFAULT_WARNING) {
             continue;
         }
         s.truncate(0);
         if (specToOpen.get() != LocaleUtility::initNameFromLocale(subres.getLocale(), s)) {
             continue;
         }
         if (variant.length() != 0) {
             status = U_ZERO_ERROR;
             resStr = subres.getStringEx(
                 CharString().appendInvariantChars(variant, status).data(), status);
             if (U_SUCCESS(status)) {
                 // Exit loop successfully
                 break;
             }
         } else {
             // Variant is empty, which means match the first variant listed.
             status = U_ZERO_ERROR;
             resStr = subres.getStringEx(1, status);
             if (U_SUCCESS(status)) {
                 // Exit loop successfully
                 break;
             }
         }
     }
     if (pass==2) {
         // Failed
         return NULL;
     }
     // We have succeeded in loading a string from the locale
     // resources.  Create a new registry entry to hold it and return it.
     TransliteratorEntry *entry = new TransliteratorEntry();
     if (entry != 0) {
         // The direction is always forward for the
         // TransliterateTo_xxx and TransliterateFrom_xxx
         // items; those are unidirectional forward rules.
         // For the bidirectional Transliterate_xxx items,
         // the direction is the value passed in to this
         // function.
         int32_t dir = (pass == 0) ? UTRANS_FORWARD : direction;
         entry->entryType = TransliteratorEntry::LOCALE_RULES;
         entry->stringArg = resStr;
         entry->intArg = dir;
     }
     return entry;
 }
 /**
  * Convenience method.  Calls 3-arg find().
  */
 TransliteratorEntry* TransliteratorRegistry::find(const UnicodeString& ID) {
     UnicodeString source, target, variant;
     UBool sawSource;
     TransliteratorIDParser::IDtoSTV(ID, source, target, variant, sawSource);
     return find(source, target, variant);
 }
 /**
  * Top-level find method.  Attempt to find a source-target/variant in
  * either the dynamic or the static (locale resource) store.  Perform
  * fallback.
  *
  * Lookup sequence for ss_SS_SSS-tt_TT_TTT/v:
  *
  *   ss_SS_SSS-tt_TT_TTT/v -- in hashtable
  *   ss_SS_SSS-tt_TT_TTT/v -- in ss_SS_SSS (no fallback)
  *
  *     repeat with t = tt_TT_TTT, tt_TT, tt, and tscript
  *
  *     ss_SS_SSS-t/ *
  *     ss_SS-t/ *
  *     ss-t/ *
  *     sscript-t/ *
  *
  * Here * matches the first variant listed.
  *
  * Caller does NOT own returned object.  Return 0 on failure.
  */
 TransliteratorEntry* TransliteratorRegistry::find(UnicodeString& source,
                                     UnicodeString& target,
                                     UnicodeString& variant) {
     TransliteratorSpec src(source);
     TransliteratorSpec trg(target);
     TransliteratorEntry* entry;
     // Seek exact match in hashtable.  Temporary fix for ICU 4.6.
     // TODO: The general logic for finding a matching transliterator needs to be reviewed.
     // ICU ticket #8089
     UnicodeString ID;
     TransliteratorIDParser::STVtoID(source, target, variant, ID);
     entry = (TransliteratorEntry*) registry.get(ID);
     if (entry != 0) {
         // std::string ss;
         // std::cout << ID.toUTF8String(ss) << std::endl;
         return entry;
     }
     if (variant.length() != 0) {
         // Seek exact match in hashtable
         entry = findInDynamicStore(src, trg, variant);
         if (entry != 0) {
             return entry;
         }
         // Seek exact match in locale resources
         entry = findInStaticStore(src, trg, variant);
         if (entry != 0) {
             return entry;
         }
     }
     for (;;) {
         src.reset();
         for (;;) {
             // Seek match in hashtable
             entry = findInDynamicStore(src, trg, NO_VARIANT);
             if (entry != 0) {
                 return entry;
             }
             // Seek match in locale resources
             entry = findInStaticStore(src, trg, NO_VARIANT);
             if (entry != 0) {
                 return entry;
             }
             if (!src.hasFallback()) {
                 break;
             }
             src.next();
         }
         if (!trg.hasFallback()) {
             break;
         }
         trg.next();
     }
     return 0;
 }
 /**
  * Given an Entry object, instantiate it.  Caller owns result.  Return
  * 0 on failure.
  *
  * Return a non-empty aliasReturn value if the ID points to an alias.
  * We cannot instantiate it ourselves because the alias may contain
  * filters or compounds, which we do not understand.  Caller should
  * make aliasReturn empty before calling.
  *
  * The entry object is assumed to reside in the dynamic store.  It may be
  * modified.
  */
 Transliterator* TransliteratorRegistry::instantiateEntry(const UnicodeString& ID,
                                                          TransliteratorEntry *entry,
                                                          TransliteratorAlias* &aliasReturn,
                                                          UErrorCode& status) {
     Transliterator *t = 0;
     U_ASSERT(aliasReturn == 0);
     switch (entry->entryType) {
     case TransliteratorEntry::RBT_DATA:
         t = new RuleBasedTransliterator(ID, entry->u.data);
         if (t == 0) {
             status = U_MEMORY_ALLOCATION_ERROR;
         }
         return t;
     case TransliteratorEntry::PROTOTYPE:
         t = entry->u.prototype->clone();
         if (t == 0) {
             status = U_MEMORY_ALLOCATION_ERROR;
         }
         return t;
     case TransliteratorEntry::ALIAS:
         aliasReturn = new TransliteratorAlias(entry->stringArg, entry->compoundFilter);
         if (aliasReturn == 0) {
             status = U_MEMORY_ALLOCATION_ERROR;
         }
         return 0;
     case TransliteratorEntry::FACTORY:
         t = entry->u.factory.function(ID, entry->u.factory.context);
         if (t == 0) {
             status = U_MEMORY_ALLOCATION_ERROR;
         }
         return t;
     case TransliteratorEntry::COMPOUND_RBT:
         {
             UVector* rbts = new UVector(entry->u.dataVector->size(), status);
             // Check for null pointer
             if (rbts == NULL) {
             	status = U_MEMORY_ALLOCATION_ERROR;
             	return NULL;
             }
             int32_t passNumber = 1;
             for (int32_t i = 0; U_SUCCESS(status) && i < entry->u.dataVector->size(); i++) {
                 // TODO: Should passNumber be turned into a decimal-string representation (1 -> "1")?
                 Transliterator* t = new RuleBasedTransliterator(UnicodeString(CompoundTransliterator::PASS_STRING) + UnicodeString(passNumber++),
                     (TransliterationRuleData*)(entry->u.dataVector->elementAt(i)), FALSE);
                 if (t == 0)
                     status = U_MEMORY_ALLOCATION_ERROR;
                 else
                     rbts->addElement(t, status);
             }
             if (U_FAILURE(status)) {
                 delete rbts;
                 return 0;
             }
             aliasReturn = new TransliteratorAlias(ID, entry->stringArg, rbts, entry->compoundFilter);
         }
         if (aliasReturn == 0) {
             status = U_MEMORY_ALLOCATION_ERROR;
         }
         return 0;
     case TransliteratorEntry::LOCALE_RULES:
         aliasReturn = new TransliteratorAlias(ID, entry->stringArg,
                                               (UTransDirection) entry->intArg);
         if (aliasReturn == 0) {
             status = U_MEMORY_ALLOCATION_ERROR;
         }
         return 0;
     case TransliteratorEntry::RULES_FORWARD:
     case TransliteratorEntry::RULES_REVERSE:
         // Process the rule data into a TransliteratorRuleData object,
         // and possibly also into an ::id header and/or footer.  Then
         // we modify the registry with the parsed data and retry.
         {
             TransliteratorParser parser(status);
             // We use the file name, taken from another resource bundle
             // 2-d array at static init time, as a locale language.  We're
             // just using the locale mechanism to map through to a file
             // name; this in no way represents an actual locale.
             //CharString ch(entry->stringArg);
             //UResourceBundle *bundle = ures_openDirect(0, ch, &status);
             UnicodeString rules = entry->stringArg;
             //ures_close(bundle);
             //if (U_FAILURE(status)) {
                 // We have a failure of some kind.  Remove the ID from the
                 // registry so we don't keep trying.  NOTE: This will throw off
                 // anyone who is, at the moment, trying to iterate over the
                 // available IDs.  That's acceptable since we should never
                 // really get here except under installation, configuration,
                 // or unrecoverable run time memory failures.
             //    remove(ID);
             //} else {
                 // If the status indicates a failure, then we don't have any
                 // rules -- there is probably an installation error.  The list
                 // in the root locale should correspond to all the installed
                 // transliterators; if it lists something that's not
                 // installed, we'll get an error from ResourceBundle.
                 aliasReturn = new TransliteratorAlias(ID, rules,
                     ((entry->entryType == TransliteratorEntry::RULES_REVERSE) ?
                      UTRANS_REVERSE : UTRANS_FORWARD));
                 if (aliasReturn == 0) {
                     status = U_MEMORY_ALLOCATION_ERROR;
                 }
             //}
         }
         return 0;
     default:
         U_ASSERT(FALSE); // can't get here
         return 0;
     }
 }
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
 //eof

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intl/icu/source/i18n/transreg.cpp@fc2d59ddac77 (annotated)

intl/icu/source/i18n/transreg.cpp