C++ Formattable::getDecimalNumber方法代码示例

U_CAPI int32_t U_EXPORT2
unum_parseDecimal(const UNumberFormat*  fmt,
            const UChar*    text,
            int32_t         textLength,
            int32_t         *parsePos /* 0 = start */,
            char            *outBuf,
            int32_t         outBufLength,
            UErrorCode      *status)
{
    if (U_FAILURE(*status)) {
        return -1;
    }
    if ((outBuf == NULL && outBufLength != 0) || outBufLength < 0) {
        *status = U_ILLEGAL_ARGUMENT_ERROR;
        return -1;
    }
    Formattable res;
    parseRes(res, fmt, text, textLength, parsePos, status);
    StringPiece sp = res.getDecimalNumber(*status);
    if (U_FAILURE(*status)) {
       return -1;
    } else if (sp.size() > outBufLength) {
        *status = U_BUFFER_OVERFLOW_ERROR;
    } else if (sp.size() == outBufLength) {
        uprv_strncpy(outBuf, sp.data(), sp.size());
        *status = U_STRING_NOT_TERMINATED_WARNING;
    } else {
        U_ASSERT(outBufLength > 0);
        uprv_strcpy(outBuf, sp.data());
    }
    return sp.size();
}

static jobject NativeDecimalFormat_parse(JNIEnv* env, jclass, jlong addr, jstring text,
        jobject position, jboolean parseBigDecimal) {

    static jmethodID gPP_getIndex = env->GetMethodID(JniConstants::parsePositionClass, "getIndex", "()I");
    static jmethodID gPP_setIndex = env->GetMethodID(JniConstants::parsePositionClass, "setIndex", "(I)V");
    static jmethodID gPP_setErrorIndex = env->GetMethodID(JniConstants::parsePositionClass, "setErrorIndex", "(I)V");

    ScopedJavaUnicodeString src(env, text);
    if (!src.valid()) {
      return NULL;
    }

    // make sure the ParsePosition is valid. Actually icu4c would parse a number
    // correctly even if the parsePosition is set to -1, but since the RI fails
    // for that case we have to fail too
    int parsePos = env->CallIntMethod(position, gPP_getIndex, NULL);
    if (parsePos < 0 || parsePos > env->GetStringLength(text)) {
        return NULL;
    }

    Formattable res;
    ParsePosition pp(parsePos);
    DecimalFormat* fmt = toDecimalFormat(addr);
    fmt->parse(src.unicodeString(), res, pp);

    if (pp.getErrorIndex() == -1) {
        env->CallVoidMethod(position, gPP_setIndex, pp.getIndex());
    } else {
        env->CallVoidMethod(position, gPP_setErrorIndex, pp.getErrorIndex());
        return NULL;
    }

    if (parseBigDecimal) {
        UErrorCode status = U_ZERO_ERROR;
        StringPiece str = res.getDecimalNumber(status);
        if (U_SUCCESS(status)) {
            int len = str.length();
            const char* data = str.data();
            if (strncmp(data, "NaN", 3) == 0 ||
                strncmp(data, "Inf", 3) == 0 ||
                strncmp(data, "-Inf", 4) == 0) {
                double resultDouble = res.getDouble(status);
                return doubleValueOf(env, resultDouble);
            }
            return newBigDecimal(env, data, len);
        }
        return NULL;
    }

    switch (res.getType()) {
        case Formattable::kDouble: return doubleValueOf(env, res.getDouble());
        case Formattable::kLong:   return longValueOf(env, res.getLong());
        case Formattable::kInt64:  return longValueOf(env, res.getInt64());
        default:                   return NULL;
    }
}

void DecimalFormatTest::execParseTest(int32_t lineNum,
                                     const UnicodeString &inputText,
                                     const UnicodeString &expectedType,
                                     const UnicodeString &expectedDecimal,
                                     UErrorCode &status) {
    
    if (U_FAILURE(status)) {
        return;
    }

    DecimalFormatSymbols symbols(Locale::getUS(), status);
    UnicodeString pattern = UNICODE_STRING_SIMPLE("####");
    DecimalFormat format(pattern, symbols, status);
    Formattable   result;
    if (U_FAILURE(status)) {
        errln("file dcfmtest.txt, line %d: %s error creating the formatter.",
            lineNum, u_errorName(status));
        return;
    }

    ParsePosition pos;
    int32_t expectedParseEndPosition = inputText.length();

    format.parse(inputText, result, pos);

    if (expectedParseEndPosition != pos.getIndex()) {
        errln("file dcfmtest.txt, line %d: Expected parse position afeter parsing: %d.  "
              "Actual parse position: %d", expectedParseEndPosition, pos.getIndex());
        return;
    }

    char   expectedTypeC[2];
    expectedType.extract(0, 1, expectedTypeC, 2, US_INV);
    Formattable::Type expectType = Formattable::kDate;
    switch (expectedTypeC[0]) {
      case 'd': expectType = Formattable::kDouble; break;
      case 'i': expectType = Formattable::kLong;   break;
      case 'l': expectType = Formattable::kInt64;  break;
      default:
          errln("file dcfmtest.tx, line %d: unrecongized expected type \"%s\"",
              lineNum, InvariantStringPiece(expectedType).data());
          return;
    }
    if (result.getType() != expectType) {
        errln("file dcfmtest.txt, line %d: expectedParseType(%s) != actual parseType(%s)",
             lineNum, formattableType(expectType), formattableType(result.getType()));
        return;
    }

    StringPiece decimalResult = result.getDecimalNumber(status);
    if (U_FAILURE(status)) {
        errln("File %s, line %d: error %s.  Line in file dcfmtest.txt:  %d:",
            __FILE__, __LINE__, u_errorName(status), lineNum);
        return;
    }

    InvariantStringPiece expectedResults(expectedDecimal);
    if (decimalResult != expectedResults) {
        errln("file dcfmtest.txt, line %d: expected \"%s\", got \"%s\"",
            lineNum, expectedResults.data(), decimalResult.data());
    }
    
    return;
}