C++ UnicodeSet::freeze方法代码示例

void StaticUnicodeSetsTest::testSetCoverage() {
    UErrorCode status = U_ZERO_ERROR;

    // Lenient comma/period should be supersets of strict comma/period;
    // it also makes the coverage logic cheaper.
    assertTrue(
            "COMMA should be superset of STRICT_COMMA",
            get(unisets::COMMA)->containsAll(*get(unisets::STRICT_COMMA)));
    assertTrue(
            "PERIOD should be superset of STRICT_PERIOD",
            get(unisets::PERIOD)->containsAll(*get(unisets::STRICT_PERIOD)));

    UnicodeSet decimals;
    decimals.addAll(*get(unisets::STRICT_COMMA));
    decimals.addAll(*get(unisets::STRICT_PERIOD));
    decimals.freeze();
    UnicodeSet grouping;
    grouping.addAll(decimals);
    grouping.addAll(*get(unisets::OTHER_GROUPING_SEPARATORS));
    decimals.freeze();

    const UnicodeSet &plusSign = *get(unisets::PLUS_SIGN);
    const UnicodeSet &minusSign = *get(unisets::MINUS_SIGN);
    const UnicodeSet &percent = *get(unisets::PERCENT_SIGN);
    const UnicodeSet &permille = *get(unisets::PERMILLE_SIGN);
    const UnicodeSet &infinity = *get(unisets::INFINITY_KEY);

    int32_t localeCount;
    const Locale* allAvailableLocales = Locale::getAvailableLocales(localeCount);
    for (int32_t i = 0; i < localeCount; i++) {
        Locale locale = allAvailableLocales[i];
        DecimalFormatSymbols dfs(locale, status);
        UnicodeString localeName;
        locale.getDisplayName(localeName);
        assertSuccess(UnicodeString("Making DFS for ") + localeName, status);

#define ASSERT_IN_SET(name, foo) assertInSet(localeName, UnicodeString("" #name ""), name, foo)
        ASSERT_IN_SET(decimals, dfs.getConstSymbol(DecimalFormatSymbols::kDecimalSeparatorSymbol));
        ASSERT_IN_SET(grouping, dfs.getConstSymbol(DecimalFormatSymbols::kGroupingSeparatorSymbol));
        ASSERT_IN_SET(plusSign, dfs.getConstSymbol(DecimalFormatSymbols::kPlusSignSymbol));
        ASSERT_IN_SET(minusSign, dfs.getConstSymbol(DecimalFormatSymbols::kMinusSignSymbol));
        ASSERT_IN_SET(percent, dfs.getConstSymbol(DecimalFormatSymbols::kPercentSymbol));
        ASSERT_IN_SET(permille, dfs.getConstSymbol(DecimalFormatSymbols::kPerMillSymbol));
        ASSERT_IN_SET(infinity, dfs.getConstSymbol(DecimalFormatSymbols::kInfinitySymbol));
    }
}

SpoofImpl::SpoofImpl() {
    fMagic = USPOOF_MAGIC;
    fSpoofData = NULL;
    fChecks = USPOOF_ALL_CHECKS;
    UnicodeSet *allowedCharsSet = new UnicodeSet(0, 0x10ffff);
    allowedCharsSet->freeze();
    fAllowedCharsSet = allowedCharsSet;
    fAllowedLocales  = uprv_strdup("");
}

SpoofImpl::SpoofImpl() :
        fMagic(USPOOF_MAGIC), fChecks(USPOOF_ALL_CHECKS), fSpoofData(NULL), fAllowedCharsSet(NULL) , 
        fAllowedLocales(NULL), fCachedIdentifierInfo(NULL) {
    UnicodeSet *allowedCharsSet = new UnicodeSet(0, 0x10ffff);
    allowedCharsSet->freeze();
    fAllowedCharsSet = allowedCharsSet;
    fAllowedLocales  = uprv_strdup("");
    fRestrictionLevel = USPOOF_HIGHLY_RESTRICTIVE;
}

static bool fontContainsCharacter(const FontPlatformData* fontData,
                                  const wchar_t* family, UChar32 character)
{
    // FIXME: For non-BMP characters, GetFontUnicodeRanges is of
    // no use. We have to read directly from the cmap table of a font.
    // Return true for now.
    if (character > 0xFFFF)
        return true;

    // This cache is just leaked on shutdown.
    static FontCmapCache* fontCmapCache = 0;
    if (!fontCmapCache)
        fontCmapCache = new FontCmapCache;

    HashMap<const wchar_t*, UnicodeSet*>::iterator it = fontCmapCache->find(family);
    if (it != fontCmapCache->end()) 
        return it->second->contains(character);
    
    HFONT hfont = fontData->hfont(); 
    HDC hdc = GetDC(0);
    HGDIOBJ oldFont = static_cast<HFONT>(SelectObject(hdc, hfont));
    int count = GetFontUnicodeRanges(hdc, 0);
    if (count == 0 && ChromiumBridge::ensureFontLoaded(hfont))
        count = GetFontUnicodeRanges(hdc, 0);
    if (count == 0) {
        ASSERT_NOT_REACHED();
        SelectObject(hdc, oldFont);
        ReleaseDC(0, hdc);
        return true;
    }

    static Vector<char, 512> glyphsetBuffer;
    glyphsetBuffer.resize(GetFontUnicodeRanges(hdc, 0));
    GLYPHSET* glyphset = reinterpret_cast<GLYPHSET*>(glyphsetBuffer.data());
    // In addition, refering to the OS/2 table and converting the codepage list
    // to the coverage map might be faster. 
    count = GetFontUnicodeRanges(hdc, glyphset);
    ASSERT(count > 0);
    SelectObject(hdc, oldFont);
    ReleaseDC(0, hdc);

    // FIXME: consider doing either of the following two:
    // 1) port back ICU 4.0's faster look-up code for UnicodeSet
    // 2) port Mozilla's CompressedCharMap or gfxSparseBitset
    unsigned i = 0;
    UnicodeSet* cmap = new UnicodeSet;
    while (i < glyphset->cRanges) {
        WCHAR start = glyphset->ranges[i].wcLow; 
        cmap->add(start, start + glyphset->ranges[i].cGlyphs - 1);
        i++;
    }
    cmap->freeze();
    // We don't lowercase |family| because all of them are under our control
    // and they're already lowercased. 
    fontCmapCache->set(family, cmap); 
    return cmap->contains(character);
}

SpoofImpl::SpoofImpl(SpoofData *data, UErrorCode &status) :
    fMagic(0), fSpoofData(NULL), fAllowedCharsSet(NULL) , fAllowedLocales(uprv_strdup("")) {
    if (U_FAILURE(status)) {
        return;
    }
    fMagic = USPOOF_MAGIC;
    fSpoofData = data;
    fChecks = USPOOF_ALL_CHECKS;
    UnicodeSet *allowedCharsSet = new UnicodeSet(0, 0x10ffff);
    if (allowedCharsSet == NULL || fAllowedLocales == NULL) {
        status = U_MEMORY_ALLOCATION_ERROR;
        return;
    }
    allowedCharsSet->freeze();
    fAllowedCharsSet = allowedCharsSet;
}

void SpoofImpl::construct(UErrorCode& status) {
    fChecks = USPOOF_ALL_CHECKS;
    fSpoofData = NULL;
    fAllowedCharsSet = NULL;
    fAllowedLocales = NULL;
    fRestrictionLevel = USPOOF_HIGHLY_RESTRICTIVE;

    if (U_FAILURE(status)) { return; }

    UnicodeSet *allowedCharsSet = new UnicodeSet(0, 0x10ffff);
    fAllowedCharsSet = allowedCharsSet;
    fAllowedLocales  = uprv_strdup("");
    if (fAllowedCharsSet == NULL || fAllowedLocales == NULL) {
        status = U_MEMORY_ALLOCATION_ERROR;
        return;
    }
    allowedCharsSet->freeze();
}

U_CAPI void U_EXPORT2
uspoof_setAllowedUnicodeSet(USpoofChecker *sc, const UnicodeSet *chars, UErrorCode *status) {
    SpoofImpl *This = SpoofImpl::validateThis(sc, *status);
    if (This == NULL) {
        return;
    }
    if (chars->isBogus()) {
        *status = U_ILLEGAL_ARGUMENT_ERROR;
        return;
    }
    UnicodeSet *clonedSet = static_cast<UnicodeSet *>(chars->clone());
    if (clonedSet == NULL || clonedSet->isBogus()) {
        *status = U_MEMORY_ALLOCATION_ERROR;
        return;
    }
    clonedSet->freeze();
    delete This->fAllowedCharsSet;
    This->fAllowedCharsSet = clonedSet;
    This->fChecks |= USPOOF_CHAR_LIMIT;
}

void SpoofImpl::setAllowedLocales(const char *localesList, UErrorCode &status) {
    UnicodeSet    allowedChars;
    UnicodeSet    *tmpSet = NULL;
    const char    *locStart = localesList;
    const char    *locEnd = NULL;
    const char    *localesListEnd = localesList + uprv_strlen(localesList);
    int32_t        localeListCount = 0;   // Number of locales provided by caller.

    // Loop runs once per locale from the localesList, a comma separated list of locales.
    do {
        locEnd = uprv_strchr(locStart, ',');
        if (locEnd == NULL) {
            locEnd = localesListEnd;
        }
        while (*locStart == ' ') {
            locStart++;
        }
        const char *trimmedEnd = locEnd-1;
        while (trimmedEnd > locStart && *trimmedEnd == ' ') {
            trimmedEnd--;
        }
        if (trimmedEnd <= locStart) {
            break;
        }
        const char *locale = uprv_strndup(locStart, (int32_t)(trimmedEnd + 1 - locStart));
        localeListCount++;

        // We have one locale from the locales list.
        // Add the script chars for this locale to the accumulating set of allowed chars.
        // If the locale is no good, we will be notified back via status.
        addScriptChars(locale, &allowedChars, status);
        uprv_free((void *)locale);
        if (U_FAILURE(status)) {
            break;
        }
        locStart = locEnd + 1;
    } while (locStart < localesListEnd);

    // If our caller provided an empty list of locales, we disable the allowed characters checking
    if (localeListCount == 0) {
        uprv_free((void *)fAllowedLocales);
        fAllowedLocales = uprv_strdup("");
        tmpSet = new UnicodeSet(0, 0x10ffff);
        if (fAllowedLocales == NULL || tmpSet == NULL) {
            status = U_MEMORY_ALLOCATION_ERROR;
            return;
        } 
        tmpSet->freeze();
        delete fAllowedCharsSet;
        fAllowedCharsSet = tmpSet;
        fChecks &= ~USPOOF_CHAR_LIMIT;
        return;
    }

        
    // Add all common and inherited characters to the set of allowed chars.
    UnicodeSet tempSet;
    tempSet.applyIntPropertyValue(UCHAR_SCRIPT, USCRIPT_COMMON, status);
    allowedChars.addAll(tempSet);
    tempSet.applyIntPropertyValue(UCHAR_SCRIPT, USCRIPT_INHERITED, status);
    allowedChars.addAll(tempSet);
    
    // If anything went wrong, we bail out without changing
    // the state of the spoof checker.
    if (U_FAILURE(status)) {
        return;
    }

    // Store the updated spoof checker state.
    tmpSet = static_cast<UnicodeSet *>(allowedChars.clone());
    const char *tmpLocalesList = uprv_strdup(localesList);
    if (tmpSet == NULL || tmpLocalesList == NULL) {
        status = U_MEMORY_ALLOCATION_ERROR;
        return;
    }
    uprv_free((void *)fAllowedLocales);
    fAllowedLocales = tmpLocalesList;
    tmpSet->freeze();
    delete fAllowedCharsSet;
    fAllowedCharsSet = tmpSet;
    fChecks |= USPOOF_CHAR_LIMIT;
}