C++ DigitList::append方法代码示例

//.........这里部分代码省略.........
                // to occur in the pattern ####00.00####, and we record the
                // number of left digits, zero (central) digits, and right
                // digits.  The position of the last grouping character is
                // recorded (should be somewhere within the first two blocks
                // of characters), as is the position of the decimal point,
                // if any (should be in the zero digits).  If there is no
                // decimal point, then there should be no right digits.
                if (pattern.compare(pos, digitLen, fDigit) == 0) {
                    if (zeroDigitCount > 0 || sigDigitCount > 0) {
                        ++digitRightCount;
                    } else {
                        ++digitLeftCount;
                    }
                    if (groupingCount >= 0 && decimalPos < 0) {
                        ++groupingCount;
                    }
                    pos += digitLen;
                } else if ((ch >= fZeroDigit && ch <= nineDigit) ||
                           ch == fSigDigit) {
                    if (digitRightCount > 0) {
                        // Unexpected '0'
                        debug("Unexpected '0'")
                        status = U_UNEXPECTED_TOKEN;
                        syntaxError(pattern,pos,parseError);
                        return;
                    }
                    if (ch == fSigDigit) {
                        ++sigDigitCount;
                    } else {
                        if (ch != fZeroDigit && roundingPos < 0) {
                            roundingPos = digitLeftCount + zeroDigitCount;
                        }
                        if (roundingPos >= 0) {
                            roundingInc.append((char)(ch - fZeroDigit + '0'));
                        }
                        ++zeroDigitCount;
                    }
                    if (groupingCount >= 0 && decimalPos < 0) {
                        ++groupingCount;
                    }
                    pos += U16_LENGTH(ch);
                } else if (pattern.compare(pos, groupSepLen, fGroupingSeparator) == 0) {
                    if (decimalPos >= 0) {
                        // Grouping separator after decimal
                        debug("Grouping separator after decimal")
                        status = U_UNEXPECTED_TOKEN;
                        syntaxError(pattern,pos,parseError);
                        return;
                    }
                    groupingCount2 = groupingCount;
                    groupingCount = 0;
                    pos += groupSepLen;
                } else if (pattern.compare(pos, decimalSepLen, fDecimalSeparator) == 0) {
                    if (decimalPos >= 0) {
                        // Multiple decimal separators
                        debug("Multiple decimal separators")
                        status = U_MULTIPLE_DECIMAL_SEPARATORS;
                        syntaxError(pattern,pos,parseError);
                        return;
                    }
                    // Intentionally incorporate the digitRightCount,
                    // even though it is illegal for this to be > 0
                    // at this point.  We check pattern syntax below.
                    decimalPos = digitLeftCount + zeroDigitCount + digitRightCount;
                    pos += decimalSepLen;
                } else {

UBool
FractionalPartSubstitution::doParse(const UnicodeString& text,
                ParsePosition& parsePosition,
                double baseValue,
                double /*upperBound*/,
                UBool lenientParse,
                Formattable& resVal) const
{
    // if we're not in byDigits mode, we can just use the inherited
    // doParse()
    if (!byDigits) {
        return NFSubstitution::doParse(text, parsePosition, baseValue, 0, lenientParse, resVal);

        // if we ARE in byDigits mode, parse the text one digit at a time
        // using this substitution's owning rule set (we do this by setting
        // upperBound to 10 when calling doParse() ) until we reach
        // nonmatching text
    } else {
        UnicodeString workText(text);
        ParsePosition workPos(1);
        double result = 0;
        int32_t digit;
//          double p10 = 0.1;

        DigitList dl;
        NumberFormat* fmt = NULL;
        while (workText.length() > 0 && workPos.getIndex() != 0) {
            workPos.setIndex(0);
            Formattable temp;
            getRuleSet()->parse(workText, workPos, 10, temp);
            UErrorCode status = U_ZERO_ERROR;
            digit = temp.getLong(status);
//            digit = temp.getType() == Formattable::kLong ?
//               temp.getLong() :
//            (int32_t)temp.getDouble();

            if (lenientParse && workPos.getIndex() == 0) {
                if (!fmt) {
                    status = U_ZERO_ERROR;
                    fmt = NumberFormat::createInstance(status);
                    if (U_FAILURE(status)) {
                        delete fmt;
                        fmt = NULL;
                    }
                }
                if (fmt) {
                    fmt->parse(workText, temp, workPos);
                    digit = temp.getLong(status);
                }
            }

            if (workPos.getIndex() != 0) {
                dl.append((char)('0' + digit));
//                  result += digit * p10;
//                  p10 /= 10;
                parsePosition.setIndex(parsePosition.getIndex() + workPos.getIndex());
                workText.removeBetween(0, workPos.getIndex());
                while (workText.length() > 0 && workText.charAt(0) == gSpace) {
                    workText.removeBetween(0, 1);
                    parsePosition.setIndex(parsePosition.getIndex() + 1);
                }
            }
        }
        delete fmt;

        result = dl.fCount == 0 ? 0 : dl.getDouble();
        result = composeRuleValue(result, baseValue);
        resVal.setDouble(result);
        return TRUE;
    }
}