The Tor Browser: intl/icu/source/i18n/identifier_info.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/identifier_info.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/identifier_info.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
 **********************************************************************
 *   Copyright (C) 2012-2013, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 */
 #include "unicode/utypes.h"
 #include "unicode/uchar.h"
 #include "unicode/utf16.h"
 #include "identifier_info.h"
 #include "mutex.h"
 #include "scriptset.h"
 #include "ucln_in.h"
 #include "uvector.h"
 U_NAMESPACE_BEGIN
 #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0]))
 static UMutex gInitMutex = U_MUTEX_INITIALIZER;
 static UBool gStaticsAreInitialized = FALSE;
 UnicodeSet *IdentifierInfo::ASCII;
 ScriptSet *IdentifierInfo::JAPANESE;
 ScriptSet *IdentifierInfo::CHINESE;
 ScriptSet *IdentifierInfo::KOREAN;
 ScriptSet *IdentifierInfo::CONFUSABLE_WITH_LATIN;
 UBool IdentifierInfo::cleanup() {
     delete ASCII;
     ASCII = NULL;
     delete JAPANESE;
     JAPANESE = NULL;
     delete CHINESE;
     CHINESE = NULL;
     delete KOREAN;
     KOREAN = NULL;
     delete CONFUSABLE_WITH_LATIN;
     CONFUSABLE_WITH_LATIN = NULL;
     gStaticsAreInitialized = FALSE;
     return TRUE;
 }
 U_CDECL_BEGIN
 static UBool U_CALLCONV
 IdentifierInfo_cleanup(void) {
     return IdentifierInfo::cleanup();
 }
 U_CDECL_END
 IdentifierInfo::IdentifierInfo(UErrorCode &status):
          fIdentifier(NULL), fRequiredScripts(NULL), fScriptSetSet(NULL),
          fCommonAmongAlternates(NULL), fNumerics(NULL), fIdentifierProfile(NULL) {
     if (U_FAILURE(status)) {
         return;
     }
     {
         Mutex lock(&gInitMutex);
         if (!gStaticsAreInitialized) {
             ASCII    = new UnicodeSet(0, 0x7f);
             JAPANESE = new ScriptSet();
             CHINESE  = new ScriptSet();
             KOREAN   = new ScriptSet();
             CONFUSABLE_WITH_LATIN = new ScriptSet();
             if (ASCII == NULL || JAPANESE == NULL || CHINESE == NULL || KOREAN == NULL
                     || CONFUSABLE_WITH_LATIN == NULL) {
                 status = U_MEMORY_ALLOCATION_ERROR;
                 return;
             }
             ASCII->freeze();
             JAPANESE->set(USCRIPT_LATIN, status).set(USCRIPT_HAN, status).set(USCRIPT_HIRAGANA, status)
                      .set(USCRIPT_KATAKANA, status);
             CHINESE->set(USCRIPT_LATIN, status).set(USCRIPT_HAN, status).set(USCRIPT_BOPOMOFO, status);
             KOREAN->set(USCRIPT_LATIN, status).set(USCRIPT_HAN, status).set(USCRIPT_HANGUL, status);
             CONFUSABLE_WITH_LATIN->set(USCRIPT_CYRILLIC, status).set(USCRIPT_GREEK, status)
                       .set(USCRIPT_CHEROKEE, status);
             ucln_i18n_registerCleanup(UCLN_I18N_IDENTIFIER_INFO, IdentifierInfo_cleanup);
             gStaticsAreInitialized = TRUE;
         }
     }
     fIdentifier = new UnicodeString();
     fRequiredScripts = new ScriptSet();
     fScriptSetSet = uhash_open(uhash_hashScriptSet, uhash_compareScriptSet, NULL, &status);
     uhash_setKeyDeleter(fScriptSetSet, uhash_deleteScriptSet);
     fCommonAmongAlternates = new ScriptSet();
     fNumerics = new UnicodeSet();
     fIdentifierProfile = new UnicodeSet(0, 0x10FFFF);
     if (U_SUCCESS(status) && (fIdentifier == NULL || fRequiredScripts == NULL || fScriptSetSet == NULL ||
                               fCommonAmongAlternates == NULL || fNumerics == NULL || fIdentifierProfile == NULL)) {
         status = U_MEMORY_ALLOCATION_ERROR;
     }
 }
 IdentifierInfo::~IdentifierInfo() {
     delete fIdentifier;
     delete fRequiredScripts;
     uhash_close(fScriptSetSet);
     delete fCommonAmongAlternates;
     delete fNumerics;
     delete fIdentifierProfile;
 }
 IdentifierInfo &IdentifierInfo::clear() {
     fRequiredScripts->resetAll();
     uhash_removeAll(fScriptSetSet);
     fNumerics->clear();
     fCommonAmongAlternates->resetAll();
     return *this;
 }
 IdentifierInfo &IdentifierInfo::setIdentifierProfile(const UnicodeSet &identifierProfile) {
     *fIdentifierProfile = identifierProfile;
     return *this;
 }
 const UnicodeSet &IdentifierInfo::getIdentifierProfile() const {
     return *fIdentifierProfile;
 }
 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, 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 = -1;;) {
             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 = -1;;) {
                     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;
 }
 const UnicodeString *IdentifierInfo::getIdentifier() const {
     return fIdentifier;
 }
 const ScriptSet *IdentifierInfo::getScripts() const {
     return fRequiredScripts;
 }
 const UHashtable *IdentifierInfo::getAlternates() const {
     return fScriptSetSet;
 }
 const UnicodeSet *IdentifierInfo::getNumerics() const {
     return fNumerics;
 }
 const ScriptSet *IdentifierInfo::getCommonAmongAlternates() const {
     return fCommonAmongAlternates;
 }
 #if !UCONFIG_NO_NORMALIZATION
 URestrictionLevel IdentifierInfo::getRestrictionLevel(UErrorCode &status) const {
     if (!fIdentifierProfile->containsAll(*fIdentifier) || getNumerics()->size() > 1) {
         return USPOOF_UNRESTRICTIVE;
     }
     if (ASCII->containsAll(*fIdentifier)) {
         return USPOOF_ASCII;
     }
     // This is a bit tricky. We look at a number of factors.
     // The number of scripts in the text.
     // Plus 1 if there is some commonality among the alternates (eg [Arab Thaa]; [Arab Syrc])
     // Plus number of alternates otherwise (this only works because we only test cardinality up to 2.)
     // Note: the requiredScripts set omits COMMON and INHERITED; they are taken out at the
     //       time it is created, in setIdentifier().
     int32_t cardinalityPlus = fRequiredScripts->countMembers() +
             (fCommonAmongAlternates->countMembers() == 0 ? uhash_count(fScriptSetSet) : 1);
     if (cardinalityPlus < 2) {
         return USPOOF_HIGHLY_RESTRICTIVE;
     }
     if (containsWithAlternates(*JAPANESE, *fRequiredScripts) || containsWithAlternates(*CHINESE, *fRequiredScripts)
             || containsWithAlternates(*KOREAN, *fRequiredScripts)) {
         return USPOOF_HIGHLY_RESTRICTIVE;
     }
     if (cardinalityPlus == 2 &&
             fRequiredScripts->test(USCRIPT_LATIN, status) &&
             !fRequiredScripts->intersects(*CONFUSABLE_WITH_LATIN)) {
         return USPOOF_MODERATELY_RESTRICTIVE;
     }
     return USPOOF_MINIMALLY_RESTRICTIVE;
 }
 #endif /* !UCONFIG_NO_NORMALIZATION */
 int32_t IdentifierInfo::getScriptCount() const {
     // Note: Common and Inherited scripts were removed by setIdentifier(), and do not appear in fRequiredScripts.
     int32_t count = fRequiredScripts->countMembers() +
             (fCommonAmongAlternates->countMembers() == 0 ? uhash_count(fScriptSetSet) : 1);
     return count;
 }
 UBool IdentifierInfo::containsWithAlternates(const ScriptSet &container, const ScriptSet &containee) const {
     if (!container.contains(containee)) {
         return FALSE;
     }
     for (int32_t iter = -1; ;) {
         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;
 }
 UnicodeString &IdentifierInfo::displayAlternates(UnicodeString &dest, const UHashtable *alternates, UErrorCode &status) {
     UVector sorted(status);
     if (U_FAILURE(status)) {
         return dest;
     }
     for (int32_t pos = -1; ;) {
         const UHashElement *el = uhash_nextElement(alternates, &pos);
         if (el == NULL) {
             break;
         }
         ScriptSet *ss = static_cast<ScriptSet *>(el->key.pointer);
         sorted.addElement(ss, status);
     }
     sorted.sort(uhash_compareScriptSet, status);
     UnicodeString separator = UNICODE_STRING_SIMPLE("; ");
     for (int32_t i=0; i<sorted.size(); i++) {
         if (i>0) {
             dest.append(separator);
         }
         ScriptSet *ss = static_cast<ScriptSet *>(sorted.elementAt(i));
         ss->displayScripts(dest);
     }
     return dest;
 }
 U_NAMESPACE_END

The Tor Browser / annotate

intl/icu/source/i18n/identifier_info.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/identifier_info.cpp