Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 988 insertions, 0 deletions

diff --git a/intl/icu/source/i18n/unum.cpp b/intl/icu/source/i18n/unum.cpp
new file mode 100644
index 0000000000..11a7bcba57
--- /dev/null
+++ b/intl/icu/source/i18n/unum.cpp
@@ -0,0 +1,988 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*   Copyright (C) 1996-2015, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+* Modification History:
+*
+*   Date        Name        Description
+*   06/24/99    helena      Integrated Alan's NF enhancements and Java2 bug fixes
+*******************************************************************************
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/unum.h"
+
+#include "unicode/uloc.h"
+#include "unicode/numfmt.h"
+#include "unicode/decimfmt.h"
+#include "unicode/rbnf.h"
+#include "unicode/compactdecimalformat.h"
+#include "unicode/ustring.h"
+#include "unicode/fmtable.h"
+#include "unicode/dcfmtsym.h"
+#include "unicode/curramt.h"
+#include "unicode/localpointer.h"
+#include "unicode/udisplaycontext.h"
+#include "uassert.h"
+#include "cpputils.h"
+#include "cstring.h"
+
+
+U_NAMESPACE_USE
+
+
+U_CAPI UNumberFormat* U_EXPORT2
+unum_open(  UNumberFormatStyle    style,  
+            const    char16_t*    pattern,
+            int32_t            patternLength,
+            const    char*     locale,
+            UParseError*       parseErr,
+            UErrorCode*        status) {
+    if(U_FAILURE(*status)) {
+        return nullptr;
+    }
+
+    NumberFormat *retVal = nullptr;
+
+    switch(style) {
+    case UNUM_DECIMAL:
+    case UNUM_CURRENCY:
+    case UNUM_PERCENT:
+    case UNUM_SCIENTIFIC:
+    case UNUM_CURRENCY_ISO:
+    case UNUM_CURRENCY_PLURAL:
+    case UNUM_CURRENCY_ACCOUNTING:
+    case UNUM_CASH_CURRENCY:
+    case UNUM_CURRENCY_STANDARD:
+        retVal = NumberFormat::createInstance(Locale(locale), style, *status);
+        break;
+
+    case UNUM_PATTERN_DECIMAL: {
+        UParseError tErr;
+        /* UnicodeString can handle the case when patternLength = -1. */
+        const UnicodeString pat(pattern, patternLength);
+
+        if(parseErr==nullptr){
+            parseErr = &tErr;
+        }
+
+        DecimalFormatSymbols *syms = new DecimalFormatSymbols(Locale(locale), *status);
+        if(syms == nullptr) {
+            *status = U_MEMORY_ALLOCATION_ERROR;
+            return nullptr;
+        }
+        if (U_FAILURE(*status)) {
+            delete syms;
+            return nullptr;
+        }
+
+        retVal = new DecimalFormat(pat, syms, *parseErr, *status);
+        if(retVal == nullptr) {
+            delete syms;
+        }
+    } break;
+
+#if U_HAVE_RBNF
+    case UNUM_PATTERN_RULEBASED: {
+        UParseError tErr;
+        /* UnicodeString can handle the case when patternLength = -1. */
+        const UnicodeString pat(pattern, patternLength);
+        
+        if(parseErr==nullptr){
+            parseErr = &tErr;
+        }
+        
+        retVal = new RuleBasedNumberFormat(pat, Locale(locale), *parseErr, *status);
+    } break;
+
+    case UNUM_SPELLOUT:
+        retVal = new RuleBasedNumberFormat(URBNF_SPELLOUT, Locale(locale), *status);
+        break;
+
+    case UNUM_ORDINAL:
+        retVal = new RuleBasedNumberFormat(URBNF_ORDINAL, Locale(locale), *status);
+        break;
+
+    case UNUM_DURATION:
+        retVal = new RuleBasedNumberFormat(URBNF_DURATION, Locale(locale), *status);
+        break;
+
+    case UNUM_NUMBERING_SYSTEM: {
+        // if the locale ID specifies a numbering system, go through NumberFormat::createInstance()
+        // to handle it properly (we have to specify UNUM_DEFAULT to get it to handle the numbering
+        // system, but we'll always get a RuleBasedNumberFormat back); otherwise, just go ahead and
+        // create a RuleBasedNumberFormat ourselves
+        UErrorCode localErr = U_ZERO_ERROR;
+        Locale localeObj(locale);
+        int32_t keywordLength = localeObj.getKeywordValue("numbers", nullptr, 0, localErr);
+        if (keywordLength > 0) {
+            retVal = NumberFormat::createInstance(localeObj, UNUM_DEFAULT, *status);
+        } else {
+            retVal = new RuleBasedNumberFormat(URBNF_NUMBERING_SYSTEM, localeObj, *status);
+        }
+    } break;
+#endif
+
+    case UNUM_DECIMAL_COMPACT_SHORT:
+        retVal = CompactDecimalFormat::createInstance(Locale(locale), UNUM_SHORT, *status);
+        break;
+
+    case UNUM_DECIMAL_COMPACT_LONG:
+        retVal = CompactDecimalFormat::createInstance(Locale(locale), UNUM_LONG, *status);
+        break;
+
+    default:
+        *status = U_UNSUPPORTED_ERROR;
+        return nullptr;
+    }
+
+    if(retVal == nullptr && U_SUCCESS(*status)) {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+    }
+
+    if (U_FAILURE(*status) && retVal != nullptr) {
+        delete retVal;
+        retVal = nullptr;
+    }
+
+    return reinterpret_cast<UNumberFormat *>(retVal);
+}
+
+U_CAPI void U_EXPORT2
+unum_close(UNumberFormat* fmt)
+{
+    delete (NumberFormat*) fmt;
+}
+
+U_CAPI UNumberFormat* U_EXPORT2
+unum_clone(const UNumberFormat *fmt,
+       UErrorCode *status)
+{
+    if(U_FAILURE(*status))
+        return 0;
+    
+    Format *res = 0;
+    const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt);
+    const DecimalFormat* df = dynamic_cast<const DecimalFormat*>(nf);
+    if (df != nullptr) {
+        res = df->clone();
+    } else {
+        const RuleBasedNumberFormat* rbnf = dynamic_cast<const RuleBasedNumberFormat*>(nf);
+        U_ASSERT(rbnf != nullptr);
+        res = rbnf->clone();
+    }
+
+    if(res == 0) {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return 0;
+    }
+    
+    return (UNumberFormat*) res;
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_format(    const    UNumberFormat*    fmt,
+        int32_t           number,
+        char16_t*            result,
+        int32_t           resultLength,
+        UFieldPosition    *pos,
+        UErrorCode*       status)
+{
+        return unum_formatInt64(fmt, number, result, resultLength, pos, status);
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_formatInt64(const UNumberFormat* fmt,
+        int64_t         number,
+        char16_t*          result,
+        int32_t         resultLength,
+        UFieldPosition *pos,
+        UErrorCode*     status)
+{
+    if(U_FAILURE(*status))
+        return -1;
+    
+    UnicodeString res;
+    if(!(result==nullptr && resultLength==0)) {
+        // nullptr destination for pure preflighting: empty dummy string
+        // otherwise, alias the destination buffer
+        res.setTo(result, 0, resultLength);
+    }
+    
+    FieldPosition fp;
+    
+    if(pos != 0)
+        fp.setField(pos->field);
+    
+    ((const NumberFormat*)fmt)->format(number, res, fp, *status);
+
+    if(pos != 0) {
+        pos->beginIndex = fp.getBeginIndex();
+        pos->endIndex = fp.getEndIndex();
+    }
+    
+    return res.extract(result, resultLength, *status);
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_formatDouble(    const    UNumberFormat*  fmt,
+            double          number,
+            char16_t*          result,
+            int32_t         resultLength,
+            UFieldPosition  *pos, /* 0 if ignore */
+            UErrorCode*     status)
+{
+ 
+  if(U_FAILURE(*status)) return -1;
+
+  UnicodeString res;
+  if(!(result==nullptr && resultLength==0)) {
+    // nullptr destination for pure preflighting: empty dummy string
+    // otherwise, alias the destination buffer
+    res.setTo(result, 0, resultLength);
+  }
+
+  FieldPosition fp;
+  
+  if(pos != 0)
+    fp.setField(pos->field);
+  
+  ((const NumberFormat*)fmt)->format(number, res, fp, *status);
+  
+  if(pos != 0) {
+    pos->beginIndex = fp.getBeginIndex();
+    pos->endIndex = fp.getEndIndex();
+  }
+  
+  return res.extract(result, resultLength, *status);
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_formatDoubleForFields(const UNumberFormat* format,
+                           double number,
+                           char16_t* result,
+                           int32_t resultLength,
+                           UFieldPositionIterator* fpositer,
+                           UErrorCode* status)
+{
+    if (U_FAILURE(*status))
+        return -1;
+
+    if (result == nullptr ? resultLength != 0 : resultLength < 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return -1;
+    }
+
+    UnicodeString res;
+    if (result != nullptr) {
+        // nullptr destination for pure preflighting: empty dummy string
+        // otherwise, alias the destination buffer
+        res.setTo(result, 0, resultLength);
+    }
+
+    ((const NumberFormat*)format)->format(number, res, (FieldPositionIterator*)fpositer, *status);
+
+    return res.extract(result, resultLength, *status);
+}
+
+U_CAPI int32_t U_EXPORT2 
+unum_formatDecimal(const    UNumberFormat*  fmt,
+            const char *    number,
+            int32_t         length,
+            char16_t*          result,
+            int32_t         resultLength,
+            UFieldPosition  *pos, /* 0 if ignore */
+            UErrorCode*     status) {
+
+    if(U_FAILURE(*status)) {
+        return -1;
+    }
+    if ((result == nullptr && resultLength != 0) || resultLength < 0) {
+        *status = U_ILLEGAL_ARGUMENT_ERROR;
+        return -1;
+    }
+
+    FieldPosition fp;
+    if(pos != 0) {
+        fp.setField(pos->field);
+    }
+
+    if (length < 0) {
+        length = static_cast<int32_t>(uprv_strlen(number));
+    }
+    StringPiece numSP(number, length);
+    Formattable numFmtbl(numSP, *status);
+
+    UnicodeString resultStr;
+    if (resultLength > 0) {
+        // Alias the destination buffer.
+        resultStr.setTo(result, 0, resultLength);
+    }
+    ((const NumberFormat*)fmt)->format(numFmtbl, resultStr, fp, *status);
+    if(pos != 0) {
+        pos->beginIndex = fp.getBeginIndex();
+        pos->endIndex = fp.getEndIndex();
+    }
+    return resultStr.extract(result, resultLength, *status);
+}
+
+
+
+
+U_CAPI int32_t U_EXPORT2 
+unum_formatDoubleCurrency(const UNumberFormat* fmt,
+                          double number,
+                          char16_t* currency,
+                          char16_t* result,
+                          int32_t resultLength,
+                          UFieldPosition* pos, /* ignored if 0 */
+                          UErrorCode* status) {
+    if (U_FAILURE(*status)) return -1;
+
+    UnicodeString res;
+    if (!(result==nullptr && resultLength==0)) {
+        // nullptr destination for pure preflighting: empty dummy string
+        // otherwise, alias the destination buffer
+        res.setTo(result, 0, resultLength);
+    }
+    
+    FieldPosition fp;
+    if (pos != 0) {
+        fp.setField(pos->field);
+    }
+    CurrencyAmount *tempCurrAmnt = new CurrencyAmount(number, currency, *status);
+    // Check for null pointer.
+    if (tempCurrAmnt == nullptr) {
+        *status = U_MEMORY_ALLOCATION_ERROR;
+        return -1;
+    }
+    Formattable n(tempCurrAmnt);
+    ((const NumberFormat*)fmt)->format(n, res, fp, *status);
+    
+    if (pos != 0) {
+        pos->beginIndex = fp.getBeginIndex();
+        pos->endIndex = fp.getEndIndex();
+    }
+  
+    return res.extract(result, resultLength, *status);
+}
+
+static void
+parseRes(Formattable& res,
+         const   UNumberFormat*  fmt,
+         const   char16_t*          text,
+         int32_t         textLength,
+         int32_t         *parsePos /* 0 = start */,
+         UErrorCode      *status)
+{
+    if(U_FAILURE(*status))
+        return;
+    
+    const UnicodeString src((UBool)(textLength == -1), text, textLength);
+    ParsePosition pp;
+    
+    if(parsePos != 0)
+        pp.setIndex(*parsePos);
+    
+    ((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();
+    }
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_parse(    const   UNumberFormat*  fmt,
+        const   char16_t*          text,
+        int32_t         textLength,
+        int32_t         *parsePos /* 0 = start */,
+        UErrorCode      *status)
+{
+    Formattable res;
+    parseRes(res, fmt, text, textLength, parsePos, status);
+    return res.getLong(*status);
+}
+
+U_CAPI int64_t U_EXPORT2
+unum_parseInt64(    const   UNumberFormat*  fmt,
+        const   char16_t*          text,
+        int32_t         textLength,
+        int32_t         *parsePos /* 0 = start */,
+        UErrorCode      *status)
+{
+    Formattable res;
+    parseRes(res, fmt, text, textLength, parsePos, status);
+    return res.getInt64(*status);
+}
+
+U_CAPI double U_EXPORT2
+unum_parseDouble(    const   UNumberFormat*  fmt,
+            const   char16_t*          text,
+            int32_t         textLength,
+            int32_t         *parsePos /* 0 = start */,
+            UErrorCode      *status)
+{
+    Formattable res;
+    parseRes(res, fmt, text, textLength, parsePos, status);
+    return res.getDouble(*status);
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_parseDecimal(const UNumberFormat*  fmt,
+            const char16_t*    text,
+            int32_t         textLength,
+            int32_t         *parsePos /* 0 = start */,
+            char            *outBuf,
+            int32_t         outBufLength,
+            UErrorCode      *status)
+{
+    if (U_FAILURE(*status)) {
+        return -1;
+    }
+    if ((outBuf == nullptr && 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();
+}
+
+U_CAPI double U_EXPORT2
+unum_parseDoubleCurrency(const UNumberFormat* fmt,
+                         const char16_t* text,
+                         int32_t textLength,
+                         int32_t* parsePos, /* 0 = start */
+                         char16_t* 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 != nullptr) {
+        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 != nullptr) {
+            *parsePos = pp.getErrorIndex();
+        }
+    } else {
+        if (parsePos != nullptr) {
+            *parsePos = pp.getIndex();
+        }
+        if (pp.getIndex() > 0) {
+            *status = U_ZERO_ERROR;
+            u_strcpy(currency, currAmt->getISOCurrency());
+            doubleVal = currAmt->getNumber().getDouble(*status);
+        }
+    }
+    return doubleVal;
+}
+
+U_CAPI const char* U_EXPORT2
+unum_getAvailable(int32_t index)
+{
+    return uloc_getAvailable(index);
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_countAvailable()
+{
+    return uloc_countAvailable();
+}
+
+U_CAPI bool U_EXPORT2
+unum_hasAttribute(const UNumberFormat*          fmt,
+          UNumberFormatAttribute  attr)
+{
+    const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt);
+    bool isDecimalFormat = dynamic_cast<const DecimalFormat*>(nf) != nullptr;
+    
+    switch (attr) {
+        case UNUM_LENIENT_PARSE:
+        case UNUM_MAX_INTEGER_DIGITS:
+        case UNUM_MIN_INTEGER_DIGITS:
+        case UNUM_INTEGER_DIGITS:
+        case UNUM_MAX_FRACTION_DIGITS:
+        case UNUM_MIN_FRACTION_DIGITS:
+        case UNUM_FRACTION_DIGITS:
+        case UNUM_ROUNDING_MODE:
+            return true;
+        default:
+            return isDecimalFormat;
+    }
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_getAttribute(const UNumberFormat*          fmt,
+          UNumberFormatAttribute  attr)
+{
+    const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt);
+    if (attr == UNUM_LENIENT_PARSE) {
+        // Supported for all subclasses
+        return nf->isLenient();
+    }
+    else if (attr == UNUM_MAX_INTEGER_DIGITS) {
+        return nf->getMaximumIntegerDigits();
+    }
+    else if (attr == UNUM_MIN_INTEGER_DIGITS) {
+        return nf->getMinimumIntegerDigits();
+    }
+    else if (attr == UNUM_INTEGER_DIGITS) {
+        // TODO: what should this return?
+        return nf->getMinimumIntegerDigits();
+    }
+    else if (attr == UNUM_MAX_FRACTION_DIGITS) {
+        return nf->getMaximumFractionDigits();
+    }
+    else if (attr == UNUM_MIN_FRACTION_DIGITS) {
+        return nf->getMinimumFractionDigits();
+    }
+    else if (attr == UNUM_FRACTION_DIGITS) {
+        // TODO: what should this return?
+        return nf->getMinimumFractionDigits();
+    }
+    else if (attr == UNUM_ROUNDING_MODE) {
+        return nf->getRoundingMode();
+    }
+
+    // The remaining attributes are only supported for DecimalFormat
+    const DecimalFormat* df = dynamic_cast<const DecimalFormat*>(nf);
+    if (df != nullptr) {
+        UErrorCode ignoredStatus = U_ZERO_ERROR;
+        return df->getAttribute(attr, ignoredStatus);
+    }
+
+    return -1;
+}
+
+U_CAPI void U_EXPORT2
+unum_setAttribute(    UNumberFormat*          fmt,
+            UNumberFormatAttribute  attr,
+            int32_t                 newValue)
+{
+    NumberFormat* nf = reinterpret_cast<NumberFormat*>(fmt);
+    if (attr == UNUM_LENIENT_PARSE) {
+        // Supported for all subclasses
+        // keep this here as the class may not be a DecimalFormat
+        return nf->setLenient(newValue != 0);
+    }
+    else if (attr == UNUM_MAX_INTEGER_DIGITS) {
+        return nf->setMaximumIntegerDigits(newValue);
+    }
+    else if (attr == UNUM_MIN_INTEGER_DIGITS) {
+        return nf->setMinimumIntegerDigits(newValue);
+    }
+    else if (attr == UNUM_INTEGER_DIGITS) {
+        nf->setMinimumIntegerDigits(newValue);
+        return nf->setMaximumIntegerDigits(newValue);
+    }
+    else if (attr == UNUM_MAX_FRACTION_DIGITS) {
+        return nf->setMaximumFractionDigits(newValue);
+    }
+    else if (attr == UNUM_MIN_FRACTION_DIGITS) {
+        return nf->setMinimumFractionDigits(newValue);
+    }
+    else if (attr == UNUM_FRACTION_DIGITS) {
+        nf->setMinimumFractionDigits(newValue);
+        return nf->setMaximumFractionDigits(newValue);
+    }
+    else if (attr == UNUM_ROUNDING_MODE) {
+        return nf->setRoundingMode((NumberFormat::ERoundingMode)newValue);
+    }
+
+    // The remaining attributes are only supported for DecimalFormat
+    DecimalFormat* df = dynamic_cast<DecimalFormat*>(nf);
+    if (df != nullptr) {
+        UErrorCode ignoredStatus = U_ZERO_ERROR;
+        df->setAttribute(attr, newValue, ignoredStatus);
+    }
+}
+
+U_CAPI double U_EXPORT2
+unum_getDoubleAttribute(const UNumberFormat*          fmt,
+          UNumberFormatAttribute  attr)
+{
+    const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt);
+    const DecimalFormat* df = dynamic_cast<const DecimalFormat*>(nf);
+    if (df != nullptr &&  attr == UNUM_ROUNDING_INCREMENT) {
+        return df->getRoundingIncrement();
+    } else {
+        return -1.0;
+    }
+}
+
+U_CAPI void U_EXPORT2
+unum_setDoubleAttribute(    UNumberFormat*          fmt,
+            UNumberFormatAttribute  attr,
+            double                 newValue)
+{
+    NumberFormat* nf = reinterpret_cast<NumberFormat*>(fmt);
+    DecimalFormat* df = dynamic_cast<DecimalFormat*>(nf);
+    if (df != nullptr && attr == UNUM_ROUNDING_INCREMENT) {   
+        df->setRoundingIncrement(newValue);
+    }
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_getTextAttribute(const UNumberFormat*  fmt,
+            UNumberFormatTextAttribute      tag,
+            char16_t*                          result,
+            int32_t                         resultLength,
+            UErrorCode*                     status)
+{
+    if(U_FAILURE(*status))
+        return -1;
+
+    UnicodeString res;
+    if(!(result==nullptr && resultLength==0)) {
+        // nullptr destination for pure preflighting: empty dummy string
+        // otherwise, alias the destination buffer
+        res.setTo(result, 0, resultLength);
+    }
+
+    const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt);
+    const DecimalFormat* df = dynamic_cast<const DecimalFormat*>(nf);
+    if (df != nullptr) {
+        switch(tag) {
+        case UNUM_POSITIVE_PREFIX:
+            df->getPositivePrefix(res);
+            break;
+
+        case UNUM_POSITIVE_SUFFIX:
+            df->getPositiveSuffix(res);
+            break;
+
+        case UNUM_NEGATIVE_PREFIX:
+            df->getNegativePrefix(res);
+            break;
+
+        case UNUM_NEGATIVE_SUFFIX:
+            df->getNegativeSuffix(res);
+            break;
+
+        case UNUM_PADDING_CHARACTER:
+            res = df->getPadCharacterString();
+            break;
+
+        case UNUM_CURRENCY_CODE:
+            res = UnicodeString(df->getCurrency());
+            break;
+
+        default:
+            *status = U_UNSUPPORTED_ERROR;
+            return -1;
+        }
+    } else {
+        const RuleBasedNumberFormat* rbnf = dynamic_cast<const RuleBasedNumberFormat*>(nf);
+        U_ASSERT(rbnf != nullptr);
+        if (tag == UNUM_DEFAULT_RULESET) {
+            res = rbnf->getDefaultRuleSetName();
+        } else if (tag == UNUM_PUBLIC_RULESETS) {
+            int32_t count = rbnf->getNumberOfRuleSetNames();
+            for (int i = 0; i < count; ++i) {
+                res += rbnf->getRuleSetName(i);
+                res += (char16_t)0x003b; // semicolon
+            }
+        } else {
+            *status = U_UNSUPPORTED_ERROR;
+            return -1;
+        }
+    }
+
+    return res.extract(result, resultLength, *status);
+}
+
+U_CAPI void U_EXPORT2
+unum_setTextAttribute(    UNumberFormat*                    fmt,
+            UNumberFormatTextAttribute      tag,
+            const    char16_t*                            newValue,
+            int32_t                            newValueLength,
+            UErrorCode                        *status)
+{
+    if(U_FAILURE(*status))
+        return;
+
+    UnicodeString val(newValue, newValueLength);
+    NumberFormat* nf = reinterpret_cast<NumberFormat*>(fmt);
+    DecimalFormat* df = dynamic_cast<DecimalFormat*>(nf);
+    if (df != nullptr) {
+      switch(tag) {
+      case UNUM_POSITIVE_PREFIX:
+        df->setPositivePrefix(val);
+        break;
+        
+      case UNUM_POSITIVE_SUFFIX:
+        df->setPositiveSuffix(val);
+        break;
+        
+      case UNUM_NEGATIVE_PREFIX:
+        df->setNegativePrefix(val);
+        break;
+        
+      case UNUM_NEGATIVE_SUFFIX:
+        df->setNegativeSuffix(val);
+        break;
+        
+      case UNUM_PADDING_CHARACTER:
+        df->setPadCharacter(val);
+        break;
+        
+      case UNUM_CURRENCY_CODE:
+        df->setCurrency(val.getTerminatedBuffer(), *status);
+        break;
+        
+      default:
+        *status = U_UNSUPPORTED_ERROR;
+        break;
+      }
+    } else {
+      RuleBasedNumberFormat* rbnf = dynamic_cast<RuleBasedNumberFormat*>(nf);
+      U_ASSERT(rbnf != nullptr);
+      if (tag == UNUM_DEFAULT_RULESET) {
+        rbnf->setDefaultRuleSet(val, *status);
+      } else {
+        *status = U_UNSUPPORTED_ERROR;
+      }
+    }
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_toPattern(    const    UNumberFormat*          fmt,
+        UBool                  isPatternLocalized,
+        char16_t*                  result,
+        int32_t                 resultLength,
+        UErrorCode*             status)
+{
+    if(U_FAILURE(*status))
+        return -1;
+    
+    UnicodeString pat;
+    if(!(result==nullptr && resultLength==0)) {
+        // nullptr destination for pure preflighting: empty dummy string
+        // otherwise, alias the destination buffer
+        pat.setTo(result, 0, resultLength);
+    }
+
+    const NumberFormat* nf = reinterpret_cast<const NumberFormat*>(fmt);
+    const DecimalFormat* df = dynamic_cast<const DecimalFormat*>(nf);
+    if (df != nullptr) {
+      if(isPatternLocalized)
+        df->toLocalizedPattern(pat);
+      else
+        df->toPattern(pat);
+    } else {
+      const RuleBasedNumberFormat* rbnf = dynamic_cast<const RuleBasedNumberFormat*>(nf);
+      U_ASSERT(rbnf != nullptr);
+      pat = rbnf->getRules();
+    }
+    return pat.extract(result, resultLength, *status);
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_getSymbol(const UNumberFormat *fmt,
+               UNumberFormatSymbol symbol,
+               char16_t *buffer,
+               int32_t size,
+               UErrorCode *status) UPRV_NO_SANITIZE_UNDEFINED {
+    if(status==nullptr || U_FAILURE(*status)) {
+        return 0;
+    }
+    if(fmt==nullptr || symbol< 0 || symbol>=UNUM_FORMAT_SYMBOL_COUNT) {
+        *status=U_ILLEGAL_ARGUMENT_ERROR;
+        return 0;
+    }
+    const NumberFormat *nf = reinterpret_cast<const NumberFormat *>(fmt);
+    const DecimalFormat *dcf = dynamic_cast<const DecimalFormat *>(nf);
+    if (dcf == nullptr) {
+      *status = U_UNSUPPORTED_ERROR;
+      return 0;
+    }
+
+    return dcf->
+      getDecimalFormatSymbols()->
+        getConstSymbol((DecimalFormatSymbols::ENumberFormatSymbol)symbol).
+          extract(buffer, size, *status);
+}
+
+U_CAPI void U_EXPORT2
+unum_setSymbol(UNumberFormat *fmt,
+               UNumberFormatSymbol symbol,
+               const char16_t *value,
+               int32_t length,
+               UErrorCode *status) UPRV_NO_SANITIZE_UNDEFINED {
+    if(status==nullptr || U_FAILURE(*status)) {
+        return;
+    }
+    if(fmt==nullptr || symbol< 0 || symbol>=UNUM_FORMAT_SYMBOL_COUNT || value==nullptr || length<-1) {
+        *status=U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+    NumberFormat *nf = reinterpret_cast<NumberFormat *>(fmt);
+    DecimalFormat *dcf = dynamic_cast<DecimalFormat *>(nf);
+    if (dcf == nullptr) {
+      *status = U_UNSUPPORTED_ERROR;
+      return;
+    }
+
+    DecimalFormatSymbols symbols(*dcf->getDecimalFormatSymbols());
+    symbols.setSymbol((DecimalFormatSymbols::ENumberFormatSymbol)symbol,
+        UnicodeString(value, length));  /* UnicodeString can handle the case when length = -1. */
+    dcf->setDecimalFormatSymbols(symbols);
+}
+
+U_CAPI void U_EXPORT2
+unum_applyPattern(  UNumberFormat  *fmt,
+                    UBool          localized,
+                    const char16_t *pattern,
+                    int32_t        patternLength,
+                    UParseError    *parseError,
+                    UErrorCode*    status)
+{
+    UErrorCode tStatus = U_ZERO_ERROR;
+    UParseError tParseError;
+    
+    if(parseError == nullptr){
+        parseError = &tParseError;
+    }
+    
+    if(status==nullptr){
+        status = &tStatus;
+    }
+    
+    int32_t len = (patternLength == -1 ? u_strlen(pattern) : patternLength);
+    const UnicodeString pat((char16_t*)pattern, len, len);
+
+    // Verify if the object passed is a DecimalFormat object
+    NumberFormat* nf = reinterpret_cast<NumberFormat*>(fmt);
+    DecimalFormat* df = dynamic_cast<DecimalFormat*>(nf);
+    if (df != nullptr) {
+      if(localized) {
+        df->applyLocalizedPattern(pat,*parseError, *status);
+      } else {
+        df->applyPattern(pat,*parseError, *status);
+      }
+    } else {
+      *status = U_UNSUPPORTED_ERROR;
+      return;
+    }
+}
+
+U_CAPI const char* U_EXPORT2
+unum_getLocaleByType(const UNumberFormat *fmt,
+                     ULocDataLocaleType type,
+                     UErrorCode* status)
+{
+    if (fmt == nullptr) {
+        if (U_SUCCESS(*status)) {
+            *status = U_ILLEGAL_ARGUMENT_ERROR;
+        }
+        return nullptr;
+    }
+    return ((const Format*)fmt)->getLocaleID(type, *status);
+}
+
+U_CAPI void U_EXPORT2
+unum_setContext(UNumberFormat* fmt, UDisplayContext value, UErrorCode* status)
+{
+    if (U_FAILURE(*status)) {
+        return;
+    }
+    ((NumberFormat*)fmt)->setContext(value, *status);
+    return;
+}
+
+U_CAPI UDisplayContext U_EXPORT2
+unum_getContext(const UNumberFormat *fmt, UDisplayContextType type, UErrorCode* status)
+{
+    if (U_FAILURE(*status)) {
+        return (UDisplayContext)0;
+    }
+    return ((const NumberFormat*)fmt)->getContext(type, *status);
+}
+
+U_CAPI UFormattable * U_EXPORT2
+unum_parseToUFormattable(const UNumberFormat* fmt,
+                         UFormattable *result,
+                         const char16_t* text,
+                         int32_t textLength,
+                         int32_t* parsePos, /* 0 = start */
+                         UErrorCode* status) {
+  UFormattable *newFormattable = nullptr;
+  if (U_FAILURE(*status)) return result;
+  if (fmt == nullptr || (text==nullptr && textLength!=0)) {
+    *status = U_ILLEGAL_ARGUMENT_ERROR;
+    return result;
+  }
+  if (result == nullptr) { // allocate if not allocated.
+    newFormattable = result = ufmt_open(status);
+  }
+  parseRes(*(Formattable::fromUFormattable(result)), fmt, text, textLength, parsePos, status);
+  if (U_FAILURE(*status) && newFormattable != nullptr) {
+    ufmt_close(newFormattable);
+    result = nullptr; // deallocate if there was a parse error
+  }
+  return result;
+}
+
+U_CAPI int32_t U_EXPORT2
+unum_formatUFormattable(const UNumberFormat* fmt,
+                        const UFormattable *number,
+                        char16_t *result,
+                        int32_t resultLength,
+                        UFieldPosition *pos, /* ignored if 0 */
+                        UErrorCode *status) {
+    if (U_FAILURE(*status)) {
+      return 0;
+    }
+    if (fmt == nullptr || number==nullptr ||
+        (result==nullptr ? resultLength!=0 : resultLength<0)) {
+      *status = U_ILLEGAL_ARGUMENT_ERROR;
+      return 0;
+    }
+    UnicodeString res(result, 0, resultLength);
+
+    FieldPosition fp;
+
+    if(pos != 0)
+        fp.setField(pos->field);
+
+    ((const NumberFormat*)fmt)->format(*(Formattable::fromUFormattable(number)), res, fp, *status);
+
+    if(pos != 0) {
+        pos->beginIndex = fp.getBeginIndex();
+        pos->endIndex = fp.getEndIndex();
+    }
+
+    return res.extract(result, resultLength, *status);
+}
+
+#endif /* #if !UCONFIG_NO_FORMATTING */