The Tor Browser: intl/icu/source/i18n/compactdecimalformat.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/compactdecimalformat.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/compactdecimalformat.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
 *******************************************************************************
 * Copyright (C) 1997-2012, International Business Machines Corporation and    *
 * others. All Rights Reserved.                                                *
 *******************************************************************************
 *
 * File COMPACTDECIMALFORMAT.CPP
 *
 ********************************************************************************
 */
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_FORMATTING
 #include "charstr.h"
 #include "cstring.h"
 #include "digitlst.h"
 #include "mutex.h"
 #include "unicode/compactdecimalformat.h"
 #include "unicode/numsys.h"
 #include "unicode/plurrule.h"
 #include "unicode/ures.h"
 #include "ucln_in.h"
 #include "uhash.h"
 #include "umutex.h"
 #include "unicode/ures.h"
 #include "uresimp.h"
 #define LENGTHOF(array) (int32_t)(sizeof(array) / sizeof((array)[0]))
 // Maps locale name to CDFLocaleData struct.
 static UHashtable* gCompactDecimalData = NULL;
 static UMutex gCompactDecimalMetaLock = U_MUTEX_INITIALIZER;
 U_NAMESPACE_BEGIN
 static const int32_t MAX_DIGITS = 15;
 static const char gOther[] = "other";
 static const char gLatnTag[] = "latn";
 static const char gNumberElementsTag[] = "NumberElements";
 static const char gDecimalFormatTag[] = "decimalFormat";
 static const char gPatternsShort[] = "patternsShort";
 static const char gPatternsLong[] = "patternsLong";
 static const char gRoot[] = "root";
 static const UChar u_0 = 0x30;
 static const UChar u_apos = 0x27;
 static const UChar kZero[] = {u_0};
 // Used to unescape single quotes.
 enum QuoteState {
   OUTSIDE,
   INSIDE_EMPTY,
   INSIDE_FULL
 };
 enum FallbackFlags {
   ANY = 0,
   MUST = 1,
   NOT_ROOT = 2
   // Next one will be 4 then 6 etc.
 };
 // CDFUnit represents a prefix-suffix pair for a particular variant
 // and log10 value.
 struct CDFUnit : public UMemory {
   UnicodeString prefix;
   UnicodeString suffix;
   inline CDFUnit() : prefix(), suffix() {
     prefix.setToBogus();
   }
   inline ~CDFUnit() {}
   inline UBool isSet() const {
     return !prefix.isBogus();
   }
   inline void markAsSet() {
     prefix.remove();
   }
 };
 // CDFLocaleStyleData contains formatting data for a particular locale
 // and style.
 class CDFLocaleStyleData : public UMemory {
  public:
   // What to divide by for each log10 value when formatting. These values
   // will be powers of 10. For English, would be:
   // 1, 1, 1, 1000, 1000, 1000, 1000000, 1000000, 1000000, 1000000000 ...
   double divisors[MAX_DIGITS];
   // Maps plural variants to CDFUnit[MAX_DIGITS] arrays.
   // To format a number x,
   // first compute log10(x). Compute displayNum = (x / divisors[log10(x)]).
   // Compute the plural variant for displayNum
   // (e.g zero, one, two, few, many, other).
   // Compute cdfUnits = unitsByVariant[pluralVariant].
   // Prefix and suffix to use at cdfUnits[log10(x)]
   UHashtable* unitsByVariant;
   inline CDFLocaleStyleData() : unitsByVariant(NULL) {}
   ~CDFLocaleStyleData();
   // Init initializes this object.
   void Init(UErrorCode& status);
   inline UBool isBogus() const {
     return unitsByVariant == NULL;
   }
   void setToBogus();
  private:
   CDFLocaleStyleData(const CDFLocaleStyleData&);
   CDFLocaleStyleData& operator=(const CDFLocaleStyleData&);
 };
 // CDFLocaleData contains formatting data for a particular locale.
 struct CDFLocaleData : public UMemory {
   CDFLocaleStyleData shortData;
   CDFLocaleStyleData longData;
   inline CDFLocaleData() : shortData(), longData() { }
   inline ~CDFLocaleData() { }
   // Init initializes this object.
   void Init(UErrorCode& status);
 };
 U_NAMESPACE_END
 U_CDECL_BEGIN
 static UBool U_CALLCONV cdf_cleanup(void) {
   if (gCompactDecimalData != NULL) {
     uhash_close(gCompactDecimalData);
     gCompactDecimalData = NULL;
   }
   return TRUE;
 }
 static void U_CALLCONV deleteCDFUnits(void* ptr) {
   delete [] (icu::CDFUnit*) ptr;
 }
 static void U_CALLCONV deleteCDFLocaleData(void* ptr) {
   delete (icu::CDFLocaleData*) ptr;
 }
 U_CDECL_END
 U_NAMESPACE_BEGIN
 static UBool divisors_equal(const double* lhs, const double* rhs);
 static const CDFLocaleStyleData* getCDFLocaleStyleData(const Locale& inLocale, UNumberCompactStyle style, UErrorCode& status);
 static const CDFLocaleStyleData* extractDataByStyleEnum(const CDFLocaleData& data, UNumberCompactStyle style, UErrorCode& status);
 static CDFLocaleData* loadCDFLocaleData(const Locale& inLocale, UErrorCode& status);
 static void initCDFLocaleData(const Locale& inLocale, CDFLocaleData* result, UErrorCode& status);
 static UResourceBundle* tryGetDecimalFallback(const UResourceBundle* numberSystemResource, const char* style, UResourceBundle** fillIn, FallbackFlags flags, UErrorCode& status);
 static UResourceBundle* tryGetByKeyWithFallback(const UResourceBundle* rb, const char* path, UResourceBundle** fillIn, FallbackFlags flags, UErrorCode& status);
 static UBool isRoot(const UResourceBundle* rb, UErrorCode& status);
 static void initCDFLocaleStyleData(const UResourceBundle* decimalFormatBundle, CDFLocaleStyleData* result, UErrorCode& status);
 static void populatePower10(const UResourceBundle* power10Bundle, CDFLocaleStyleData* result, UErrorCode& status);
 static int32_t populatePrefixSuffix(const char* variant, int32_t log10Value, const UnicodeString& formatStr, UHashtable* result, UErrorCode& status);
 static UBool onlySpaces(UnicodeString u);
 static void fixQuotes(UnicodeString& s);
 static void fillInMissing(CDFLocaleStyleData* result);
 static int32_t computeLog10(double x, UBool inRange);
 static CDFUnit* createCDFUnit(const char* variant, int32_t log10Value, UHashtable* table, UErrorCode& status);
 static const CDFUnit* getCDFUnitFallback(const UHashtable* table, const UnicodeString& variant, int32_t log10Value);
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(CompactDecimalFormat)
 CompactDecimalFormat::CompactDecimalFormat(
     const DecimalFormat& decimalFormat,
     const UHashtable* unitsByVariant,
     const double* divisors,
     PluralRules* pluralRules)
   : DecimalFormat(decimalFormat), _unitsByVariant(unitsByVariant), _divisors(divisors), _pluralRules(pluralRules) {
 }
 CompactDecimalFormat::CompactDecimalFormat(const CompactDecimalFormat& source)
     : DecimalFormat(source), _unitsByVariant(source._unitsByVariant), _divisors(source._divisors), _pluralRules(source._pluralRules->clone()) {
 }
 CompactDecimalFormat* U_EXPORT2
 CompactDecimalFormat::createInstance(
     const Locale& inLocale, UNumberCompactStyle style, UErrorCode& status) {
   LocalPointer<DecimalFormat> decfmt((DecimalFormat*) NumberFormat::makeInstance(inLocale, UNUM_DECIMAL, TRUE, status));
   if (U_FAILURE(status)) {
     return NULL;
   }
   LocalPointer<PluralRules> pluralRules(PluralRules::forLocale(inLocale, status));
   if (U_FAILURE(status)) {
     return NULL;
   }
   const CDFLocaleStyleData* data = getCDFLocaleStyleData(inLocale, style, status);
   if (U_FAILURE(status)) {
     return NULL;
   }
   CompactDecimalFormat* result =
       new CompactDecimalFormat(*decfmt, data->unitsByVariant, data->divisors, pluralRules.getAlias());
   if (result == NULL) {
     status = U_MEMORY_ALLOCATION_ERROR;
     return NULL;
   }
   pluralRules.orphan();
   result->setMaximumSignificantDigits(3);
   result->setSignificantDigitsUsed(TRUE);
   result->setGroupingUsed(FALSE);
   return result;
 }
 CompactDecimalFormat&
 CompactDecimalFormat::operator=(const CompactDecimalFormat& rhs) {
   if (this != &rhs) {
     DecimalFormat::operator=(rhs);
     _unitsByVariant = rhs._unitsByVariant;
     _divisors = rhs._divisors;
     delete _pluralRules;
     _pluralRules = rhs._pluralRules->clone();
   }
   return *this;
 }
 CompactDecimalFormat::~CompactDecimalFormat() {
   delete _pluralRules;
 }
 Format*
 CompactDecimalFormat::clone(void) const {
   return new CompactDecimalFormat(*this);
 }
 UBool
 CompactDecimalFormat::operator==(const Format& that) const {
   if (this == &that) {
     return TRUE;
   }
   return (DecimalFormat::operator==(that) && eqHelper((const CompactDecimalFormat&) that));
 }
 UBool
 CompactDecimalFormat::eqHelper(const CompactDecimalFormat& that) const {
   return uhash_equals(_unitsByVariant, that._unitsByVariant) && divisors_equal(_divisors, that._divisors) && (*_pluralRules == *that._pluralRules);
 }
 UnicodeString&
 CompactDecimalFormat::format(
     double number,
     UnicodeString& appendTo,
     FieldPosition& pos) const {
   DigitList orig, rounded;
   orig.set(number);
   UBool isNegative;
   UErrorCode status = U_ZERO_ERROR;
   _round(orig, rounded, isNegative, status);
   if (U_FAILURE(status)) {
     return appendTo;
   }
   double roundedDouble = rounded.getDouble();
   if (isNegative) {
     roundedDouble = -roundedDouble;
   }
   int32_t baseIdx = computeLog10(roundedDouble, TRUE);
   double numberToFormat = roundedDouble / _divisors[baseIdx];
   UnicodeString variant = _pluralRules->select(numberToFormat);
   if (isNegative) {
     numberToFormat = -numberToFormat;
   }
   const CDFUnit* unit = getCDFUnitFallback(_unitsByVariant, variant, baseIdx);
   appendTo += unit->prefix;
   DecimalFormat::format(numberToFormat, appendTo, pos);
   appendTo += unit->suffix;
   return appendTo;
 }
 UnicodeString&
 CompactDecimalFormat::format(
     double /* number */,
     UnicodeString& appendTo,
     FieldPositionIterator* /* posIter */,
     UErrorCode& status) const {
   status = U_UNSUPPORTED_ERROR;
   return appendTo;
 }
 UnicodeString&
 CompactDecimalFormat::format(
     int64_t number,
     UnicodeString& appendTo,
     FieldPosition& pos) const {
   return format((double) number, appendTo, pos);
 }
 UnicodeString&
 CompactDecimalFormat::format(
     int64_t /* number */,
     UnicodeString& appendTo,
     FieldPositionIterator* /* posIter */,
     UErrorCode& status) const {
   status = U_UNSUPPORTED_ERROR;
   return appendTo;
 }
 UnicodeString&
 CompactDecimalFormat::format(
     const StringPiece& /* number */,
     UnicodeString& appendTo,
     FieldPositionIterator* /* posIter */,
     UErrorCode& status) const {
   status = U_UNSUPPORTED_ERROR;
   return appendTo;
 }
 UnicodeString&
 CompactDecimalFormat::format(
     const DigitList& /* number */,
     UnicodeString& appendTo,
     FieldPositionIterator* /* posIter */,
     UErrorCode& status) const {
   status = U_UNSUPPORTED_ERROR;
   return appendTo;
 }
 UnicodeString&
 CompactDecimalFormat::format(const DigitList& /* number */,
                              UnicodeString& appendTo,
                              FieldPosition& /* pos */,
                              UErrorCode& status) const {
   status = U_UNSUPPORTED_ERROR;
   return appendTo;
 }
 void
 CompactDecimalFormat::parse(
     const UnicodeString& /* text */,
     Formattable& /* result */,
     ParsePosition& /* parsePosition */) const {
 }
 void
 CompactDecimalFormat::parse(
     const UnicodeString& /* text */,
     Formattable& /* result */,
     UErrorCode& status) const {
   status = U_UNSUPPORTED_ERROR;
 }
 CurrencyAmount*
 CompactDecimalFormat::parseCurrency(
     const UnicodeString& /* text */,
     ParsePosition& /* pos */) const {
   return NULL;
 }
 void CDFLocaleStyleData::Init(UErrorCode& status) {
   if (unitsByVariant != NULL) {
     return;
   }
   unitsByVariant = uhash_open(uhash_hashChars, uhash_compareChars, NULL, &status);
   if (U_FAILURE(status)) {
     return;
   }
   uhash_setKeyDeleter(unitsByVariant, uprv_free);
   uhash_setValueDeleter(unitsByVariant, deleteCDFUnits);
 }
 CDFLocaleStyleData::~CDFLocaleStyleData() {
   setToBogus();
 }
 void CDFLocaleStyleData::setToBogus() {
   if (unitsByVariant != NULL) {
     uhash_close(unitsByVariant);
     unitsByVariant = NULL;
   }
 }
 void CDFLocaleData::Init(UErrorCode& status) {
   shortData.Init(status);
   if (U_FAILURE(status)) {
     return;
   }
   longData.Init(status);
 }
 // Helper method for operator=
 static UBool divisors_equal(const double* lhs, const double* rhs) {
   for (int32_t i = 0; i < MAX_DIGITS; ++i) {
     if (lhs[i] != rhs[i]) {
       return FALSE;
     }
   }
   return TRUE;
 }
 // getCDFLocaleStyleData returns pointer to formatting data for given locale and
 // style within the global cache. On cache miss, getCDFLocaleStyleData loads
 // the data from CLDR into the global cache before returning the pointer. If a
 // UNUM_LONG data is requested for a locale, and that locale does not have
 // UNUM_LONG data, getCDFLocaleStyleData will fall back to UNUM_SHORT data for
 // that locale.
 static const CDFLocaleStyleData* getCDFLocaleStyleData(const Locale& inLocale, UNumberCompactStyle style, UErrorCode& status) {
   if (U_FAILURE(status)) {
     return NULL;
   }
   CDFLocaleData* result = NULL;
   const char* key = inLocale.getName();
   {
     Mutex lock(&gCompactDecimalMetaLock);
     if (gCompactDecimalData == NULL) {
       gCompactDecimalData = uhash_open(uhash_hashChars, uhash_compareChars, NULL, &status);
       if (U_FAILURE(status)) {
         return NULL;
       }
       uhash_setKeyDeleter(gCompactDecimalData, uprv_free);
       uhash_setValueDeleter(gCompactDecimalData, deleteCDFLocaleData);
       ucln_i18n_registerCleanup(UCLN_I18N_CDFINFO, cdf_cleanup);
     } else {
       result = (CDFLocaleData*) uhash_get(gCompactDecimalData, key);
     }
   }
   if (result != NULL) {
     return extractDataByStyleEnum(*result, style, status);
   }
   result = loadCDFLocaleData(inLocale, status);
   if (U_FAILURE(status)) {
     return NULL;
   }
   {
     Mutex lock(&gCompactDecimalMetaLock);
     CDFLocaleData* temp = (CDFLocaleData*) uhash_get(gCompactDecimalData, key);
     if (temp != NULL) {
       delete result;
       result = temp;
     } else {
       uhash_put(gCompactDecimalData, uprv_strdup(key), (void*) result, &status);
       if (U_FAILURE(status)) {
         return NULL;
       }
     }
   }
   return extractDataByStyleEnum(*result, style, status);
 }
 static const CDFLocaleStyleData* extractDataByStyleEnum(const CDFLocaleData& data, UNumberCompactStyle style, UErrorCode& status) {
   switch (style) {
     case UNUM_SHORT:
       return &data.shortData;
     case UNUM_LONG:
       if (!data.longData.isBogus()) {
         return &data.longData;
       }
       return &data.shortData;
     default:
       status = U_ILLEGAL_ARGUMENT_ERROR;
       return NULL;
   }
 }
 // loadCDFLocaleData loads formatting data from CLDR for a given locale. The
 // caller owns the returned pointer.
 static CDFLocaleData* loadCDFLocaleData(const Locale& inLocale, UErrorCode& status) {
   if (U_FAILURE(status)) {
     return NULL;
   }
   CDFLocaleData* result = new CDFLocaleData;
   if (result == NULL) {
     status = U_MEMORY_ALLOCATION_ERROR;
     return NULL;
   }
   result->Init(status);
   if (U_FAILURE(status)) {
     delete result;
     return NULL;
   }
   initCDFLocaleData(inLocale, result, status);
   if (U_FAILURE(status)) {
     delete result;
     return NULL;
   }
   return result;
 }
 // initCDFLocaleData initializes result with data from CLDR.
 // inLocale is the locale, the CLDR data is stored in result.
 // We load the UNUM_SHORT  and UNUM_LONG data looking first in local numbering
 // system and not including root locale in fallback. Next we try in the latn
 // numbering system where we fallback all the way to root. If we don't find
 // UNUM_SHORT data in these three places, we report an error. If we find
 // UNUM_SHORT data before finding UNUM_LONG data we make UNUM_LONG data fall
 // back to UNUM_SHORT data.
 static void initCDFLocaleData(const Locale& inLocale, CDFLocaleData* result, UErrorCode& status) {
   LocalPointer<NumberingSystem> ns(NumberingSystem::createInstance(inLocale, status));
   if (U_FAILURE(status)) {
     return;
   }
   const char* numberingSystemName = ns->getName();
   UResourceBundle* rb = ures_open(NULL, inLocale.getName(), &status);
   rb = ures_getByKeyWithFallback(rb, gNumberElementsTag, rb, &status);
   if (U_FAILURE(status)) {
     ures_close(rb);
     return;
   }
   UResourceBundle* shortDataFillIn = NULL;
   UResourceBundle* longDataFillIn = NULL;
   UResourceBundle* shortData = NULL;
   UResourceBundle* longData = NULL;
   if (uprv_strcmp(numberingSystemName, gLatnTag) != 0) {
     LocalUResourceBundlePointer localResource(
         tryGetByKeyWithFallback(rb, numberingSystemName, NULL, NOT_ROOT, status));
     shortData = tryGetDecimalFallback(
         localResource.getAlias(), gPatternsShort, &shortDataFillIn, NOT_ROOT, status);
     longData = tryGetDecimalFallback(
         localResource.getAlias(), gPatternsLong, &longDataFillIn, NOT_ROOT, status);
   }
   if (U_FAILURE(status)) {
     ures_close(shortDataFillIn);
     ures_close(longDataFillIn);
     ures_close(rb);
     return;
   }
   // If we haven't found UNUM_SHORT look in latn numbering system. We must
   // succeed at finding UNUM_SHORT here.
   if (shortData == NULL) {
     LocalUResourceBundlePointer latnResource(tryGetByKeyWithFallback(rb, gLatnTag, NULL, MUST, status));
     shortData = tryGetDecimalFallback(latnResource.getAlias(), gPatternsShort, &shortDataFillIn, MUST, status);
     if (longData == NULL) {
       longData = tryGetDecimalFallback(latnResource.getAlias(), gPatternsLong, &longDataFillIn, ANY, status);
       if (longData != NULL && isRoot(longData, status) && !isRoot(shortData, status)) {
         longData = NULL;
       }
     }
   }
   initCDFLocaleStyleData(shortData, &result->shortData, status);
   ures_close(shortDataFillIn);
   if (U_FAILURE(status)) {
     ures_close(longDataFillIn);
     ures_close(rb);
   }
   if (longData == NULL) {
     result->longData.setToBogus();
   } else {
     initCDFLocaleStyleData(longData, &result->longData, status);
   }
   ures_close(longDataFillIn);
   ures_close(rb);
 }
 /**
  * tryGetDecimalFallback attempts to fetch the "decimalFormat" resource bundle
  * with a particular style. style is either "patternsShort" or "patternsLong."
  * FillIn, flags, and status work in the same way as in tryGetByKeyWithFallback.
  */
 static UResourceBundle* tryGetDecimalFallback(const UResourceBundle* numberSystemResource, const char* style, UResourceBundle** fillIn, FallbackFlags flags, UErrorCode& status) {
   UResourceBundle* first = tryGetByKeyWithFallback(numberSystemResource, style, fillIn, flags, status);
   UResourceBundle* second = tryGetByKeyWithFallback(first, gDecimalFormatTag, fillIn, flags, status);
   if (fillIn == NULL) {
     ures_close(first);
   }
   return second;
 }
 // tryGetByKeyWithFallback returns a sub-resource bundle that matches given
 // criteria or NULL if none found. rb is the resource bundle that we are
 // searching. If rb == NULL then this function behaves as if no sub-resource
 // is found; path is the key of the sub-resource,
 // (i.e "foo" but not "foo/bar"); If fillIn is NULL, caller must always call
 // ures_close() on returned resource. See below for example when fillIn is
 // not NULL. flags is ANY or NOT_ROOT. Optionally, these values
 // can be ored with MUST. MUST by itself is the same as ANY | MUST.
 // The locale of the returned sub-resource will either match the
 // flags or the returned sub-resouce will be NULL. If MUST is included in
 // flags, and not suitable sub-resource is found then in addition to returning
 // NULL, this function also sets status to U_MISSING_RESOURCE_ERROR. If MUST
 // is not included in flags, then this function just returns NULL if no
 // such sub-resource is found and will never set status to
 // U_MISSING_RESOURCE_ERROR.
 //
 // Example: This code first searches for "foo/bar" sub-resource without falling
 // back to ROOT. Then searches for "baz" sub-resource as last resort.
 //
 // UResourcebundle* fillIn = NULL;
 // UResourceBundle* data = tryGetByKeyWithFallback(rb, "foo", &fillIn, NON_ROOT, status);
 // data = tryGetByKeyWithFallback(data, "bar", &fillIn, NON_ROOT, status);
 // if (!data) {
 //   data = tryGetbyKeyWithFallback(rb, "baz", &fillIn, MUST,  status);
 // }
 // if (U_FAILURE(status)) {
 //   ures_close(fillIn);
 //   return;
 // }
 // doStuffWithNonNullSubresource(data);
 //
 // /* Wrong! don't do the following as it can leak memory if fillIn gets set
 // to NULL. */
 // fillIn = tryGetByKeyWithFallback(rb, "wrong", &fillIn, ANY, status);
 //
 // ures_close(fillIn);
 //
 static UResourceBundle* tryGetByKeyWithFallback(const UResourceBundle* rb, const char* path, UResourceBundle** fillIn, FallbackFlags flags, UErrorCode& status) {
   if (U_FAILURE(status)) {
     return NULL;
   }
   UBool must = (flags & MUST);
   if (rb == NULL) {
     if (must) {
       status = U_MISSING_RESOURCE_ERROR;
     }
     return NULL;
   }
   UResourceBundle* result = NULL;
   UResourceBundle* ownedByUs = NULL;
   if (fillIn == NULL) {
     ownedByUs = ures_getByKeyWithFallback(rb, path, NULL, &status);
     result = ownedByUs;
   } else {
     *fillIn = ures_getByKeyWithFallback(rb, path, *fillIn, &status);
     result = *fillIn;
   }
   if (U_FAILURE(status)) {
     ures_close(ownedByUs);
     if (status == U_MISSING_RESOURCE_ERROR && !must) {
       status = U_ZERO_ERROR;
     }
     return NULL;
   }
   flags = (FallbackFlags) (flags & ~MUST);
   switch (flags) {
     case NOT_ROOT:
       {
         UBool bRoot = isRoot(result, status);
         if (bRoot || U_FAILURE(status)) {
           ures_close(ownedByUs);
           if (must && (status == U_ZERO_ERROR)) {
             status = U_MISSING_RESOURCE_ERROR;
           }
           return NULL;
         }
         return result;
       }
     case ANY:
       return result;
     default:
       ures_close(ownedByUs);
       status = U_ILLEGAL_ARGUMENT_ERROR;
       return NULL;
   }
 }
 static UBool isRoot(const UResourceBundle* rb, UErrorCode& status) {
   const char* actualLocale = ures_getLocaleByType(
       rb, ULOC_ACTUAL_LOCALE, &status);
   if (U_FAILURE(status)) {
     return FALSE;
   }
   return uprv_strcmp(actualLocale, gRoot) == 0;
 }
 // initCDFLocaleStyleData loads formatting data for a particular style.
 // decimalFormatBundle is the "decimalFormat" resource bundle in CLDR.
 // Loaded data stored in result.
 static void initCDFLocaleStyleData(const UResourceBundle* decimalFormatBundle, CDFLocaleStyleData* result, UErrorCode& status) {
   if (U_FAILURE(status)) {
     return;
   }
   // Iterate through all the powers of 10.
   int32_t size = ures_getSize(decimalFormatBundle);
   UResourceBundle* power10 = NULL;
   for (int32_t i = 0; i < size; ++i) {
     power10 = ures_getByIndex(decimalFormatBundle, i, power10, &status);
     if (U_FAILURE(status)) {
       ures_close(power10);
       return;
     }
     populatePower10(power10, result, status);
     if (U_FAILURE(status)) {
       ures_close(power10);
       return;
     }
   }
   ures_close(power10);
   fillInMissing(result);
 }
 // populatePower10 grabs data for a particular power of 10 from CLDR.
 // The loaded data is stored in result.
 static void populatePower10(const UResourceBundle* power10Bundle, CDFLocaleStyleData* result, UErrorCode& status) {
   if (U_FAILURE(status)) {
     return;
   }
   char* endPtr = NULL;
   double power10 = uprv_strtod(ures_getKey(power10Bundle), &endPtr);
   if (*endPtr != 0) {
     status = U_INTERNAL_PROGRAM_ERROR;
     return;
   }
   int32_t log10Value = computeLog10(power10, FALSE);
   // Silently ignore divisors that are too big.
   if (log10Value == MAX_DIGITS) {
     return;
   }
   int32_t size = ures_getSize(power10Bundle);
   int32_t numZeros = 0;
   UBool otherVariantDefined = FALSE;
   UResourceBundle* variantBundle = NULL;
   // Iterate over all the plural variants for the power of 10
   for (int32_t i = 0; i < size; ++i) {
     variantBundle = ures_getByIndex(power10Bundle, i, variantBundle, &status);
     if (U_FAILURE(status)) {
       ures_close(variantBundle);
       return;
     }
     const char* variant = ures_getKey(variantBundle);
     int32_t resLen;
     const UChar* formatStrP = ures_getString(variantBundle, &resLen, &status);
     if (U_FAILURE(status)) {
       ures_close(variantBundle);
       return;
     }
     UnicodeString formatStr(false, formatStrP, resLen);
     if (uprv_strcmp(variant, gOther) == 0) {
       otherVariantDefined = TRUE;
     }
     int32_t nz = populatePrefixSuffix(
         variant, log10Value, formatStr, result->unitsByVariant, status);
     if (U_FAILURE(status)) {
       ures_close(variantBundle);
       return;
     }
     if (nz != numZeros) {
       // We expect all format strings to have the same number of 0's
       // left of the decimal point.
       if (numZeros != 0) {
         status = U_INTERNAL_PROGRAM_ERROR;
         ures_close(variantBundle);
         return;
       }
       numZeros = nz;
     }
   }
   ures_close(variantBundle);
   // We expect to find an OTHER variant for each power of 10.
   if (!otherVariantDefined) {
     status = U_INTERNAL_PROGRAM_ERROR;
     return;
   }
   double divisor = power10;
   for (int32_t i = 1; i < numZeros; ++i) {
     divisor /= 10.0;
   }
   result->divisors[log10Value] = divisor;
 }
 // populatePrefixSuffix Adds a specific prefix-suffix pair to result for a
 // given variant and log10 value.
 // variant is 'zero', 'one', 'two', 'few', 'many', or 'other'.
 // formatStr is the format string from which the prefix and suffix are
 // extracted. It is usually of form 'Pefix 000 suffix'.
 // populatePrefixSuffix returns the number of 0's found in formatStr
 // before the decimal point.
 // In the special case that formatStr contains only spaces for prefix
 // and suffix, populatePrefixSuffix returns log10Value + 1.
 static int32_t populatePrefixSuffix(
     const char* variant, int32_t log10Value, const UnicodeString& formatStr, UHashtable* result, UErrorCode& status) {
   if (U_FAILURE(status)) {
     return 0;
   }
   int32_t firstIdx = formatStr.indexOf(kZero, LENGTHOF(kZero), 0);
   // We must have 0's in format string.
   if (firstIdx == -1) {
     status = U_INTERNAL_PROGRAM_ERROR;
     return 0;
   }
   int32_t lastIdx = formatStr.lastIndexOf(kZero, LENGTHOF(kZero), firstIdx);
   CDFUnit* unit = createCDFUnit(variant, log10Value, result, status);
   if (U_FAILURE(status)) {
     return 0;
   }
   // Everything up to first 0 is the prefix
   unit->prefix = formatStr.tempSubString(0, firstIdx);
   fixQuotes(unit->prefix);
   // Everything beyond the last 0 is the suffix
   unit->suffix = formatStr.tempSubString(lastIdx + 1);
   fixQuotes(unit->suffix);
   // If there is effectively no prefix or suffix, ignore the actual number of
   // 0's and act as if the number of 0's matches the size of the number.
   if (onlySpaces(unit->prefix) && onlySpaces(unit->suffix)) {
     return log10Value + 1;
   }
   // Calculate number of zeros before decimal point
   int32_t idx = firstIdx + 1;
   while (idx <= lastIdx && formatStr.charAt(idx) == u_0) {
     ++idx;
   }
   return (idx - firstIdx);
 }
 static UBool onlySpaces(UnicodeString u) {
   return u.trim().length() == 0;
 }
 // fixQuotes unescapes single quotes. Don''t -> Don't. Letter 'j' -> Letter j.
 // Modifies s in place.
 static void fixQuotes(UnicodeString& s) {
   QuoteState state = OUTSIDE;
   int32_t len = s.length();
   int32_t dest = 0;
   for (int32_t i = 0; i < len; ++i) {
     UChar ch = s.charAt(i);
     if (ch == u_apos) {
       if (state == INSIDE_EMPTY) {
         s.setCharAt(dest, ch);
         ++dest;
       }
     } else {
       s.setCharAt(dest, ch);
       ++dest;
     }
     // Update state
     switch (state) {
       case OUTSIDE:
         state = ch == u_apos ? INSIDE_EMPTY : OUTSIDE;
         break;
       case INSIDE_EMPTY:
       case INSIDE_FULL:
         state = ch == u_apos ? OUTSIDE : INSIDE_FULL;
         break;
       default:
         break;
     }
   }
   s.truncate(dest);
 }
 // fillInMissing ensures that the data in result is complete.
 // result data is complete if for each variant in result, there exists
 // a prefix-suffix pair for each log10 value and there also exists
 // a divisor for each log10 value.
 //
 // First this function figures out for which log10 values, the other
 // variant already had data. These are the same log10 values defined
 // in CLDR.
 //
 // For each log10 value not defined in CLDR, it uses the divisor for
 // the last defined log10 value or 1.
 //
 // Then for each variant, it does the following. For each log10
 // value not defined in CLDR, copy the prefix-suffix pair from the
 // previous log10 value. If log10 value is defined in CLDR but is
 // missing from given variant, copy the prefix-suffix pair for that
 // log10 value from the 'other' variant.
 static void fillInMissing(CDFLocaleStyleData* result) {
   const CDFUnit* otherUnits =
       (const CDFUnit*) uhash_get(result->unitsByVariant, gOther);
   UBool definedInCLDR[MAX_DIGITS];
   double lastDivisor = 1.0;
   for (int32_t i = 0; i < MAX_DIGITS; ++i) {
     if (!otherUnits[i].isSet()) {
       result->divisors[i] = lastDivisor;
       definedInCLDR[i] = FALSE;
     } else {
       lastDivisor = result->divisors[i];
       definedInCLDR[i] = TRUE;
     }
   }
   // Iterate over each variant.
   int32_t pos = -1;
   const UHashElement* element = uhash_nextElement(result->unitsByVariant, &pos);
   for (;element != NULL; element = uhash_nextElement(result->unitsByVariant, &pos)) {
     CDFUnit* units = (CDFUnit*) element->value.pointer;
     for (int32_t i = 0; i < MAX_DIGITS; ++i) {
       if (definedInCLDR[i]) {
         if (!units[i].isSet()) {
           units[i] = otherUnits[i];
         }
       } else {
         if (i == 0) {
           units[0].markAsSet();
         } else {
           units[i] = units[i - 1];
         }
       }
     }
   }
 }
 // computeLog10 computes floor(log10(x)). If inRange is TRUE, the biggest
 // value computeLog10 will return MAX_DIGITS -1 even for
 // numbers > 10^MAX_DIGITS. If inRange is FALSE, computeLog10 will return
 // up to MAX_DIGITS.
 static int32_t computeLog10(double x, UBool inRange) {
   int32_t result = 0;
   int32_t max = inRange ? MAX_DIGITS - 1 : MAX_DIGITS;
   while (x >= 10.0) {
     x /= 10.0;
     ++result;
     if (result == max) {
       break;
     }
   }
   return result;
 }
 // createCDFUnit returns a pointer to the prefix-suffix pair for a given
 // variant and log10 value within table. If no such prefix-suffix pair is
 // stored in table, one is created within table before returning pointer.
 static CDFUnit* createCDFUnit(const char* variant, int32_t log10Value, UHashtable* table, UErrorCode& status) {
   if (U_FAILURE(status)) {
     return NULL;
   }
   CDFUnit *cdfUnit = (CDFUnit*) uhash_get(table, variant);
   if (cdfUnit == NULL) {
     cdfUnit = new CDFUnit[MAX_DIGITS];
     if (cdfUnit == NULL) {
       status = U_MEMORY_ALLOCATION_ERROR;
       return NULL;
     }
     uhash_put(table, uprv_strdup(variant), cdfUnit, &status);
     if (U_FAILURE(status)) {
       return NULL;
     }
   }
   CDFUnit* result = &cdfUnit[log10Value];
   result->markAsSet();
   return result;
 }
 // getCDFUnitFallback returns a pointer to the prefix-suffix pair for a given
 // variant and log10 value within table. If the given variant doesn't exist, it
 // falls back to the OTHER variant. Therefore, this method will always return
 // some non-NULL value.
 static const CDFUnit* getCDFUnitFallback(const UHashtable* table, const UnicodeString& variant, int32_t log10Value) {
   CharString cvariant;
   UErrorCode status = U_ZERO_ERROR;
   const CDFUnit *cdfUnit = NULL;
   cvariant.appendInvariantChars(variant, status);
   if (!U_FAILURE(status)) {
     cdfUnit = (const CDFUnit*) uhash_get(table, cvariant.data());
   }
   if (cdfUnit == NULL) {
     cdfUnit = (const CDFUnit*) uhash_get(table, gOther);
   }
   return &cdfUnit[log10Value];
 }
 U_NAMESPACE_END
 #endif

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intl/icu/source/i18n/compactdecimalformat.cpp@b8a032363ba2 (annotated)

intl/icu/source/i18n/compactdecimalformat.cpp