C++ ParsePosition::getIndex方法代码示例

void
ChoiceFormat::parse(const UnicodeString& text, 
                    Formattable& result,
                    ParsePosition& status) const
{
    // find the best number (defined as the one with the longest parse)
    int32_t start = status.getIndex();
    int32_t furthest = start;
    double bestNumber = uprv_getNaN();
    double tempNumber = 0.0;
    for (int i = 0; i < fCount; ++i) {
        int32_t len = fChoiceFormats[i].length();
        if (text.compare(start, len, fChoiceFormats[i]) == 0) {
            status.setIndex(start + len);
            tempNumber = fChoiceLimits[i];
            if (status.getIndex() > furthest) {
                furthest = status.getIndex();
                bestNumber = tempNumber;
                if (furthest == text.length()) 
                    break;
            }
        }
    }
    status.setIndex(furthest);
    if (status.getIndex() == start) {
        status.setErrorIndex(furthest);
    }
    result.setDouble(bestNumber);
}

UDate
DateFormat::parse(const UnicodeString& text,
                  ParsePosition& pos) const
{
    UDate d = 0; // Error return UDate is 0 (the epoch)
    if (fCalendar != NULL) {
        int32_t start = pos.getIndex();

        // Parse may update TimeZone used by the calendar.
        TimeZone *tzsav = (TimeZone*)fCalendar->getTimeZone().clone();

        fCalendar->clear();
        parse(text, *fCalendar, pos);
        if (pos.getIndex() != start) {
            UErrorCode ec = U_ZERO_ERROR;
            d = fCalendar->getTime(ec);
            if (U_FAILURE(ec)) {
                // We arrive here if fCalendar is non-lenient and there
                // is an out-of-range field.  We don't know which field
                // was illegal so we set the error index to the start.
                pos.setIndex(start);
                pos.setErrorIndex(start);
                d = 0;
            }
        }

        // Restore TimeZone
        fCalendar->adoptTimeZone(tzsav);
    }
    return d;
}

U_CAPI double U_EXPORT2
unum_parseDoubleCurrency(const UNumberFormat* fmt,
                         const UChar* text,
                         int32_t textLength,
                         int32_t* parsePos, /* 0 = start */
                         UChar* currency,
                         UErrorCode* status) {
    double doubleVal = 0.0;
    currency[0] = 0;
    if (U_FAILURE(*status)) {
        return doubleVal;
    }
    const UnicodeString src((UBool)(textLength == -1), text, textLength);
    ParsePosition pp;
    if (parsePos != NULL) {
        pp.setIndex(*parsePos);
    }
    *status = U_PARSE_ERROR; // assume failure, reset if succeed
    LocalPointer<CurrencyAmount> currAmt(((const NumberFormat*)fmt)->parseCurrency(src, pp));
    if (pp.getErrorIndex() != -1) {
        if (parsePos != NULL) {
            *parsePos = pp.getErrorIndex();
        }
    } else {
        if (parsePos != NULL) {
            *parsePos = pp.getIndex();
        }
        if (pp.getIndex() > 0) {
            *status = U_ZERO_ERROR;
            u_strcpy(currency, currAmt->getISOCurrency());
            doubleVal = currAmt->getNumber().getDouble(*status);
        }
    }
    return doubleVal;
}

UDate
DateFormat::parse(const UnicodeString& text,
                  ParsePosition& pos) const
{
    UDate d = 0; // Error return UDate is 0 (the epoch)
    if (fCalendar != NULL) {
        Calendar* calClone = fCalendar->clone();
        if (calClone != NULL) {
            int32_t start = pos.getIndex();
            calClone->clear();
            parse(text, *calClone, pos);
            if (pos.getIndex() != start) {
                UErrorCode ec = U_ZERO_ERROR;
                d = calClone->getTime(ec);
                if (U_FAILURE(ec)) {
                    // We arrive here if fCalendar => calClone is non-lenient and
                    // there is an out-of-range field.  We don't know which field
                    // was illegal so we set the error index to the start.
                    pos.setIndex(start);
                    pos.setErrorIndex(start);
                    d = 0;
                }
            }
            delete calClone;
        }
    }
    return d;
}

/**
 * @bug 4104136
 */
void DateFormatRegressionTest::Test4104136(void) 
{
    UErrorCode status = U_ZERO_ERROR;
    SimpleDateFormat *sdf = new SimpleDateFormat(status); 
    if(U_FAILURE(status)) {
      dataerrln("Couldn't create SimpleDateFormat, error %s", u_errorName(status));
      delete sdf;
      return;
    }
    if(failure(status, "new SimpleDateFormat")) return;
    UnicodeString pattern = "'time' hh:mm"; 
    sdf->applyPattern(pattern); 
    logln("pattern: \"" + pattern + "\""); 

    UnicodeString strings [] = {
        (UnicodeString)"time 10:30",
        (UnicodeString) "time 10:x",
        (UnicodeString) "time 10x"
    };

    ParsePosition ppos [] = {
        ParsePosition(10),
        ParsePosition(0),
        ParsePosition(0)
    };

    UDate dates [] = {
        date(70, UCAL_JANUARY, 1, 10, 30),
        -1,
        -1
    };

    /*Object[] DATA = {
        "time 10:30", new ParsePosition(10), new Date(70, Calendar.JANUARY, 1, 10, 30),
        "time 10:x", new ParsePosition(0), null,
        "time 10x", new ParsePosition(0), null,
    };*/
    
    for(int i = 0; i < 3; i++) {
        UnicodeString text = strings[i];
        ParsePosition finish = ppos[i];
        UDate exp = dates[i];
        
        ParsePosition pos(0);
        UDate d = sdf->parse(text, pos);
        logln(" text: \"" + text + "\""); 
        logln(" index: %d", pos.getIndex()); 
        logln((UnicodeString) " result: " + d);
        if(pos.getIndex() != finish.getIndex())
            errln("Fail: Expected pos " + finish.getIndex());
        if (! ((d == 0 && exp == -1) || (d == exp)))
            errln((UnicodeString) "Fail: Expected result " + exp);
    }

    delete sdf;
}

U_CAPI void U_EXPORT2
udat_parseCalendar(const    UDateFormat*    format,
                            UCalendar*      calendar,
                   const    UChar*          text,
                            int32_t         textLength,
                            int32_t         *parsePos,
                            UErrorCode      *status)
{
    if(U_FAILURE(*status)) return;

    const UnicodeString src((UBool)(textLength == -1), text, textLength);
    ParsePosition pp;

    if(parsePos != 0)
        pp.setIndex(*parsePos);

    ((DateFormat*)format)->parse(src, *(Calendar*)calendar, pp);

    if(parsePos != 0) {
        if(pp.getErrorIndex() == -1)
            *parsePos = pp.getIndex();
        else {
            *parsePos = pp.getErrorIndex();
            *status = U_PARSE_ERROR;
        }
    }
}

U_CAPI int32_t U_EXPORT2 
uset_applyPattern(USet *set,
                  const UChar *pattern, int32_t patternLength,
                  uint32_t options,
                  UErrorCode *status){

    // status code needs to be checked since we 
    // dereference it
    if(status == NULL || U_FAILURE(*status)){
        return 0;
    }

    // check only the set paramenter
    // if pattern is NULL or null terminate
    // UnicodeString constructor takes care of it
    if(set == NULL){
        *status = U_ILLEGAL_ARGUMENT_ERROR;
        return 0;
    }

    UnicodeString pat(pattern, patternLength);

    ParsePosition pos;
   
    ((UnicodeSet*) set)->applyPattern(pat, pos, options, NULL, *status);
    
    return pos.getIndex();
}

static void
parseRes(Formattable& res,
         const   UNumberFormat*  fmt,
         const   UChar*          text,
         int32_t         textLength,
         int32_t         *parsePos /* 0 = start */,
         UBool parseCurrency,
         UErrorCode      *status)
{
    if(U_FAILURE(*status))
        return;
    
    int32_t len = (textLength == -1 ? u_strlen(text) : textLength);
    const UnicodeString src((UChar*)text, len, len);
    ParsePosition pp;
    
    if(parsePos != 0)
        pp.setIndex(*parsePos);
    
    if (parseCurrency) {
        ((const NumberFormat*)fmt)->parseCurrency(src, res, pp);
    } else {
        ((const NumberFormat*)fmt)->parse(src, res, pp);
    }
    
    if(pp.getErrorIndex() != -1) {
        *status = U_PARSE_ERROR;
        if(parsePos != 0) {
            *parsePos = pp.getErrorIndex();
        }
    } else if(parsePos != 0) {
        *parsePos = pp.getIndex();
    }
}

double
ChoiceFormat::parseArgument(
        const MessagePattern &pattern, int32_t partIndex,
        const UnicodeString &source, ParsePosition &pos) {
    // find the best number (defined as the one with the longest parse)
    int32_t start = pos.getIndex();
    int32_t furthest = start;
    double bestNumber = uprv_getNaN();
    double tempNumber = 0.0;
    int32_t count = pattern.countParts();
    while (partIndex < count && pattern.getPartType(partIndex) != UMSGPAT_PART_TYPE_ARG_LIMIT) {
        tempNumber = pattern.getNumericValue(pattern.getPart(partIndex));
        partIndex += 2;  // skip the numeric part and ignore the ARG_SELECTOR
        int32_t msgLimit = pattern.getLimitPartIndex(partIndex);
        int32_t len = matchStringUntilLimitPart(pattern, partIndex, msgLimit, source, start);
        if (len >= 0) {
            int32_t newIndex = start + len;
            if (newIndex > furthest) {
                furthest = newIndex;
                bestNumber = tempNumber;
                if (furthest == source.length()) {
                    break;
                }
            }
        }
        partIndex = msgLimit + 1;
    }
    if (furthest == start) {
        pos.setErrorIndex(start);
    } else {
        pos.setIndex(furthest);
    }
    return bestNumber;
}

bool
NumberValcon::parse(const QString& text)
{
    if (text.isEmpty()) {
	_value = 0;
	return true;
    }

    UnicodeString utext = convertToICU(text);

    // Parse the number using ICU
    UErrorCode status = U_ZERO_ERROR;
    NumberFormat* fmt = NumberFormat::createInstance(status);
    if (U_SUCCESS(status)) {
	Formattable value;
	ParsePosition pos;
	fmt->parse(utext, value, pos);
	if (pos.getErrorIndex() == -1 && pos.getIndex() == utext.length()) {
#if U_ICU_VERSION_MAJOR_NUM < 3
	    _value = value.getDouble(&status);
#else
	    _value = value.getDouble(status);
#endif
	    return true;
	}
    }

    return false;
}

/**
 * If this is a >>> substitution, match only against ruleToUse.
 * Otherwise, use the superclass function.
 * @param text The string to parse
 * @param parsePosition Ignored on entry, updated on exit to point to
 * the first unmatched character.
 * @param baseValue The partial parse result prior to calling this
 * routine.
 */
UBool
ModulusSubstitution::doParse(const UnicodeString& text,
                             ParsePosition& parsePosition,
                             double baseValue,
                             double upperBound,
                             UBool lenientParse,
                             Formattable& result) const
{
    // if this isn't a >>> substitution, we can just use the
    // inherited parse() routine to do the parsing
    if (ruleToUse == NULL) {
        return NFSubstitution::doParse(text, parsePosition, baseValue, upperBound, lenientParse, result);

        // but if it IS a >>> substitution, we have to do it here: we
        // use the specific rule's doParse() method, and then we have to
        // do some of the other work of NFRuleSet.parse()
    } else {
        ruleToUse->doParse(text, parsePosition, FALSE, upperBound, result);

        if (parsePosition.getIndex() != 0) {
            UErrorCode status = U_ZERO_ERROR;
            double tempResult = result.getDouble(status);
            tempResult = composeRuleValue(tempResult, baseValue);
            result.setDouble(tempResult);
        }

        return TRUE;
    }
}

void
SelectFormat::parseObject(const UnicodeString& /*source*/,
                        Formattable& /*result*/,
                        ParsePosition& pos) const
{
    // TODO: not yet supported in icu4j and icu4c
    pos.setErrorIndex(pos.getIndex());
}

void
PluralFormat::parseObject(const UnicodeString& /*source*/,
                        Formattable& /*result*/,
                        ParsePosition& pos) const
{
    // Parsing not supported.
    pos.setErrorIndex(pos.getIndex());
}

void TimeUnitTest::test10219Plurals() {
    Locale usLocale("en_US");
    double values[2] = {1.588, 1.011};
    UnicodeString expected[2][3] = {
        {"1 minute", "1.5 minutes", "1.58 minutes"},
        {"1 minute", "1.0 minutes", "1.01 minutes"}
    };
    UErrorCode status = U_ZERO_ERROR;
    TimeUnitFormat tuf(usLocale, status);
    if (U_FAILURE(status)) {
        dataerrln("generating TimeUnitFormat Object failed: %s", u_errorName(status));
        return;
    }
    LocalPointer<DecimalFormat> nf((DecimalFormat *) NumberFormat::createInstance(usLocale, status));
    if (U_FAILURE(status)) {
        dataerrln("generating NumberFormat Object failed: %s", u_errorName(status));
        return;
    }
    for (int32_t j = 0; j < UPRV_LENGTHOF(values); ++j) {
        for (int32_t i = 0; i < UPRV_LENGTHOF(expected[j]); ++i) {
            nf->setMinimumFractionDigits(i);
            nf->setMaximumFractionDigits(i);
            nf->setRoundingMode(DecimalFormat::kRoundDown);
            tuf.setNumberFormat(*nf, status);
            if (U_FAILURE(status)) {
                dataerrln("setting NumberFormat failed: %s", u_errorName(status));
                return;
            }
            UnicodeString actual;
            Formattable fmt;
            LocalPointer<TimeUnitAmount> tamt(
                new TimeUnitAmount(values[j], TimeUnit::UTIMEUNIT_MINUTE, status), status);
            if (U_FAILURE(status)) {
                dataerrln("generating TimeUnitAmount Object failed: %s", u_errorName(status));
                return;
            }
            fmt.adoptObject(tamt.orphan());
            tuf.format(fmt, actual, status);
            if (U_FAILURE(status)) {
                dataerrln("Actual formatting failed: %s", u_errorName(status));
                return;
            }
            if (expected[j][i] != actual) {
                errln("Expected " + expected[j][i] + ", got " + actual);
            }
        }
    }

    // test parsing
    Formattable result;
    ParsePosition pos;
    UnicodeString formattedString = "1 minutes";
    tuf.parseObject(formattedString, result, pos);
    if (formattedString.length() != pos.getIndex()) {
        errln("Expect parsing to go all the way to the end of the string.");
    }
}

void RelativeDateFormat::parse( const UnicodeString& text,
                                Calendar& cal,
                                ParsePosition& pos) const {

    // Can the fDateFormat parse it?
    if(fDateFormat != NULL) {
        ParsePosition aPos(pos);
        fDateFormat->parse(text,cal,aPos);
        if((aPos.getIndex() != pos.getIndex()) &&
                (aPos.getErrorIndex()==-1)) {
            pos=aPos; // copy the sub parse
            return; // parsed subfmt OK
        }
    }

    // Linear search the relative strings
    for(int n=0; n<fDatesLen; n++) {
        if(fDates[n].string != NULL &&
                (0==text.compare(pos.getIndex(),
                                 fDates[n].len,
                                 fDates[n].string))) {
            UErrorCode status = U_ZERO_ERROR;

            // Set the calendar to now+offset
            cal.setTime(Calendar::getNow(),status);
            cal.add(UCAL_DATE,fDates[n].offset, status);

            if(U_FAILURE(status)) {
                // failure in setting calendar fields
                pos.setErrorIndex(pos.getIndex()+fDates[n].len);
            } else {
                pos.setIndex(pos.getIndex()+fDates[n].len);
            }
            return;
        }
    }

    // parse failed
}