Check in the pristine copy of ICU 4.6...

icu46/source/i18n/dtptngen.cpp

+/*
+*******************************************************************************
+* Copyright (C) 2007-2010, International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*
+* File DTPTNGEN.CPP
+*
+*******************************************************************************
+*/
+
+#include "unicode/utypes.h"
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/datefmt.h"
+#include "unicode/decimfmt.h"
+#include "unicode/dtfmtsym.h"
+#include "unicode/dtptngen.h"
+#include "unicode/msgfmt.h"
+#include "unicode/smpdtfmt.h"
+#include "unicode/udat.h"
+#include "unicode/udatpg.h"
+#include "unicode/uniset.h"
+#include "unicode/uloc.h"
+#include "unicode/ures.h"
+#include "unicode/ustring.h"
+#include "unicode/rep.h"
+#include "cpputils.h"
+#include "ucln_in.h"
+#include "mutex.h"
+#include "cmemory.h"
+#include "cstring.h"
+#include "locbased.h"
+#include "gregoimp.h"
+#include "hash.h"
+#include "uresimp.h"
+#include "dtptngen_impl.h"
+
+#define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0]))
+
+#if U_CHARSET_FAMILY==U_EBCDIC_FAMILY
+/**
+ * If we are on EBCDIC, use an iterator which will
+ * traverse the bundles in ASCII order.
+ */
+#define U_USE_ASCII_BUNDLE_ITERATOR
+#define U_SORT_ASCII_BUNDLE_ITERATOR
+#endif
+
+#if defined(U_USE_ASCII_BUNDLE_ITERATOR)
+
+#include "unicode/ustring.h"
+#include "uarrsort.h"
+
+struct UResAEntry {
+    UChar *key;
+    UResourceBundle *item;
+};
+
+struct UResourceBundleAIterator {
+    UResourceBundle  *bund;
+    UResAEntry *entries;
+    int32_t num;
+    int32_t cursor;
+};
+
+/* Must be C linkage to pass function pointer to the sort function */
+
+#if !defined (OS390) && !defined (OS400)
+extern "C"
+#endif
+static int32_t U_CALLCONV
+ures_a_codepointSort(const void *context, const void *left, const void *right) {
+    //CompareContext *cmp=(CompareContext *)context;
+    return u_strcmp(((const UResAEntry *)left)->key,
+                    ((const UResAEntry *)right)->key);
+}
+
+
+static void ures_a_open(UResourceBundleAIterator *aiter, UResourceBundle *bund, UErrorCode *status) {
+    if(U_FAILURE(*status)) {
+        return;
+    }
+    aiter->bund = bund;
+    aiter->num = ures_getSize(aiter->bund);
+    aiter->cursor = 0;
+#if !defined(U_SORT_ASCII_BUNDLE_ITERATOR)
+    aiter->entries = NULL;
+#else
+    aiter->entries = (UResAEntry*)uprv_malloc(sizeof(UResAEntry)*aiter->num);
+    for(int i=0;i<aiter->num;i++) {
+        aiter->entries[i].item = ures_getByIndex(aiter->bund, i, NULL, status);
+        const char *akey = ures_getKey(aiter->entries[i].item);
+        int32_t len = uprv_strlen(akey)+1;
+        aiter->entries[i].key = (UChar*)uprv_malloc(len*sizeof(UChar));
+        u_charsToUChars(akey, aiter->entries[i].key, len);
+    }
+    uprv_sortArray(aiter->entries, aiter->num, sizeof(UResAEntry), ures_a_codepointSort, NULL, TRUE, status);
+#endif
+}
+
+static void ures_a_close(UResourceBundleAIterator *aiter) {
+#if defined(U_SORT_ASCII_BUNDLE_ITERATOR)
+    for(int i=0;i<aiter->num;i++) {
+        uprv_free(aiter->entries[i].key);
+        ures_close(aiter->entries[i].item);
+    }
+#endif
+}
+
+static const UChar *ures_a_getNextString(UResourceBundleAIterator *aiter, int32_t *len, const char **key, UErrorCode *err) {
+#if !defined(U_SORT_ASCII_BUNDLE_ITERATOR)
+    return ures_getNextString(aiter->bund, len, key, err);
+#else
+    if(U_FAILURE(*err)) return NULL;
+    UResourceBundle *item = aiter->entries[aiter->cursor].item;
+    const UChar* ret = ures_getString(item, len, err);
+    *key = ures_getKey(item);
+    aiter->cursor++;
+    return ret;
+#endif
+}
+
+
+#endif
+
+
+U_NAMESPACE_BEGIN
+
+
+// *****************************************************************************
+// class DateTimePatternGenerator
+// *****************************************************************************
+static const UChar Canonical_Items[] = {
+    // GyQMwWEdDFHmsSv
+    CAP_G, LOW_Y, CAP_Q, CAP_M, LOW_W, CAP_W, CAP_E, LOW_D, CAP_D, CAP_F,
+    CAP_H, LOW_M, LOW_S, CAP_S, LOW_V, 0
+};
+
+static const dtTypeElem dtTypes[] = {
+    // patternChar, field, type, minLen, weight
+    {CAP_G, UDATPG_ERA_FIELD, DT_SHORT, 1, 3,},
+    {CAP_G, UDATPG_ERA_FIELD, DT_LONG, 4, 0},
+    {LOW_Y, UDATPG_YEAR_FIELD, DT_NUMERIC, 1, 20},
+    {CAP_Y, UDATPG_YEAR_FIELD, DT_NUMERIC + DT_DELTA, 1, 20},
+    {LOW_U, UDATPG_YEAR_FIELD, DT_NUMERIC + 2*DT_DELTA, 1, 20},
+    {CAP_Q, UDATPG_QUARTER_FIELD, DT_NUMERIC, 1, 2},
+    {CAP_Q, UDATPG_QUARTER_FIELD, DT_SHORT, 3, 0},
+    {CAP_Q, UDATPG_QUARTER_FIELD, DT_LONG, 4, 0},
+    {LOW_Q, UDATPG_QUARTER_FIELD, DT_NUMERIC + DT_DELTA, 1, 2},
+    {LOW_Q, UDATPG_QUARTER_FIELD, DT_SHORT + DT_DELTA, 3, 0},
+    {LOW_Q, UDATPG_QUARTER_FIELD, DT_LONG + DT_DELTA, 4, 0},
+    {CAP_M, UDATPG_MONTH_FIELD, DT_NUMERIC, 1, 2},
+    {CAP_M, UDATPG_MONTH_FIELD, DT_SHORT, 3, 0},
+    {CAP_M, UDATPG_MONTH_FIELD, DT_LONG, 4, 0},
+    {CAP_M, UDATPG_MONTH_FIELD, DT_NARROW, 5, 0},
+    {CAP_L, UDATPG_MONTH_FIELD, DT_NUMERIC + DT_DELTA, 1, 2},
+    {CAP_L, UDATPG_MONTH_FIELD, DT_SHORT - DT_DELTA, 3, 0},
+    {CAP_L, UDATPG_MONTH_FIELD, DT_LONG - DT_DELTA, 4, 0},
+    {CAP_L, UDATPG_MONTH_FIELD, DT_NARROW - DT_DELTA, 5, 0},
+    {LOW_W, UDATPG_WEEK_OF_YEAR_FIELD, DT_NUMERIC, 1, 2},
+    {CAP_W, UDATPG_WEEK_OF_MONTH_FIELD, DT_NUMERIC + DT_DELTA, 1, 0},
+    {CAP_E, UDATPG_WEEKDAY_FIELD, DT_SHORT, 1, 3},
+    {CAP_E, UDATPG_WEEKDAY_FIELD, DT_LONG, 4, 0},
+    {CAP_E, UDATPG_WEEKDAY_FIELD, DT_NARROW, 5, 0},
+    {LOW_C, UDATPG_WEEKDAY_FIELD, DT_NUMERIC + 2*DT_DELTA, 1, 2},
+    {LOW_C, UDATPG_WEEKDAY_FIELD, DT_SHORT - 2*DT_DELTA, 3, 0},
+    {LOW_C, UDATPG_WEEKDAY_FIELD, DT_LONG - 2*DT_DELTA, 4, 0},
+    {LOW_C, UDATPG_WEEKDAY_FIELD, DT_NARROW - 2*DT_DELTA, 5, 0},
+    {LOW_E, UDATPG_WEEKDAY_FIELD, DT_NUMERIC + DT_DELTA, 1, 2}, // LOW_E is currently not used in CLDR data, should not be canonical
+    {LOW_E, UDATPG_WEEKDAY_FIELD, DT_SHORT - DT_DELTA, 3, 0},
+    {LOW_E, UDATPG_WEEKDAY_FIELD, DT_LONG - DT_DELTA, 4, 0},
+    {LOW_E, UDATPG_WEEKDAY_FIELD, DT_NARROW - DT_DELTA, 5, 0},
+    {LOW_D, UDATPG_DAY_FIELD, DT_NUMERIC, 1, 2},
+    {CAP_D, UDATPG_DAY_OF_YEAR_FIELD, DT_NUMERIC + DT_DELTA, 1, 3},
+    {CAP_F, UDATPG_DAY_OF_WEEK_IN_MONTH_FIELD, DT_NUMERIC + 2*DT_DELTA, 1, 0},
+    {LOW_G, UDATPG_DAY_FIELD, DT_NUMERIC + 3*DT_DELTA, 1, 20}, // really internal use, so we don't care
+    {LOW_A, UDATPG_DAYPERIOD_FIELD, DT_SHORT, 1, 0},
+    {CAP_H, UDATPG_HOUR_FIELD, DT_NUMERIC + 10*DT_DELTA, 1, 2}, // 24 hour
+    {LOW_K, UDATPG_HOUR_FIELD, DT_NUMERIC + 11*DT_DELTA, 1, 2},
+    {LOW_H, UDATPG_HOUR_FIELD, DT_NUMERIC, 1, 2}, // 12 hour
+    {LOW_K, UDATPG_HOUR_FIELD, DT_NUMERIC + DT_DELTA, 1, 2},
+    {LOW_M, UDATPG_MINUTE_FIELD, DT_NUMERIC, 1, 2},
+    {LOW_S, UDATPG_SECOND_FIELD, DT_NUMERIC, 1, 2},
+    {CAP_S, UDATPG_FRACTIONAL_SECOND_FIELD, DT_NUMERIC + DT_DELTA, 1, 1000},
+    {CAP_A, UDATPG_SECOND_FIELD, DT_NUMERIC + 2*DT_DELTA, 1, 1000},
+    {LOW_V, UDATPG_ZONE_FIELD, DT_SHORT - 2*DT_DELTA, 1, 0},
+    {LOW_V, UDATPG_ZONE_FIELD, DT_LONG - 2*DT_DELTA, 4, 0},
+    {LOW_Z, UDATPG_ZONE_FIELD, DT_SHORT, 1, 3},
+    {LOW_Z, UDATPG_ZONE_FIELD, DT_LONG, 4, 0},
+    {CAP_Z, UDATPG_ZONE_FIELD, DT_SHORT - DT_DELTA, 1, 3},
+    {CAP_Z, UDATPG_ZONE_FIELD, DT_LONG - DT_DELTA, 4, 0},
+    {CAP_V, UDATPG_ZONE_FIELD, DT_SHORT - DT_DELTA, 1, 3},
+    {CAP_V, UDATPG_ZONE_FIELD, DT_LONG - DT_DELTA, 4, 0},
+    {0, UDATPG_FIELD_COUNT, 0, 0, 0} , // last row of dtTypes[]
+ };
+
+static const char* const CLDR_FIELD_APPEND[] = {
+    "Era", "Year", "Quarter", "Month", "Week", "*", "Day-Of-Week", "Day", "*", "*", "*",
+    "Hour", "Minute", "Second", "*", "Timezone"
+};
+
+static const char* const CLDR_FIELD_NAME[] = {
+    "era", "year", "quarter", "month", "week", "*", "weekday", "day", "*", "*", "dayperiod",
+    "hour", "minute", "second", "*", "zone"
+};
+
+static const char* const Resource_Fields[] = {
+    "day", "dayperiod", "era", "hour", "minute", "month", "second", "week",
+    "weekday", "year", "zone", "quarter" };
+
+// For appendItems
+static const UChar UDATPG_ItemFormat[]= {0x7B, 0x30, 0x7D, 0x20, 0x251C, 0x7B, 0x32, 0x7D, 0x3A,
+    0x20, 0x7B, 0x31, 0x7D, 0x2524, 0};  // {0} \u251C{2}: {1}\u2524
+
+static const UChar repeatedPatterns[6]={CAP_G, CAP_E, LOW_Z, LOW_V, CAP_Q, 0}; // "GEzvQ"
+
+static const char DT_DateTimePatternsTag[]="DateTimePatterns";
+static const char DT_DateTimeCalendarTag[]="calendar";
+static const char DT_DateTimeGregorianTag[]="gregorian";
+static const char DT_DateTimeAppendItemsTag[]="appendItems";
+static const char DT_DateTimeFieldsTag[]="fields";
+static const char DT_DateTimeAvailableFormatsTag[]="availableFormats";
+//static const UnicodeString repeatedPattern=UnicodeString(repeatedPatterns);
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(DateTimePatternGenerator)
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(DTSkeletonEnumeration)
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(DTRedundantEnumeration)
+
+DateTimePatternGenerator*  U_EXPORT2
+DateTimePatternGenerator::createInstance(UErrorCode& status) {
+    return createInstance(Locale::getDefault(), status);
+}
+
+DateTimePatternGenerator* U_EXPORT2
+DateTimePatternGenerator::createInstance(const Locale& locale, UErrorCode& status) {
+    DateTimePatternGenerator *result = new DateTimePatternGenerator(locale, status);
+    if (result == NULL) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+    }
+    if (U_FAILURE(status)) {
+        delete result;
+        result = NULL;
+    }
+    return result;
+}
+
+DateTimePatternGenerator*  U_EXPORT2
+DateTimePatternGenerator::createEmptyInstance(UErrorCode& status) {
+    DateTimePatternGenerator *result = new DateTimePatternGenerator(status);
+    if (result == NULL) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+    }
+    if (U_FAILURE(status)) {
+        delete result;
+        result = NULL;
+    }
+    return result;
+}
+
+DateTimePatternGenerator::DateTimePatternGenerator(UErrorCode &status) :
+    skipMatcher(NULL),
+    fAvailableFormatKeyHash(NULL)
+{
+    fp = new FormatParser();
+    dtMatcher = new DateTimeMatcher();
+    distanceInfo = new DistanceInfo();
+    patternMap = new PatternMap();
+    if (fp == NULL || dtMatcher == NULL || distanceInfo == NULL || patternMap == NULL) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+    }
+}
+
+DateTimePatternGenerator::DateTimePatternGenerator(const Locale& locale, UErrorCode &status) :
+    skipMatcher(NULL),
+    fAvailableFormatKeyHash(NULL)
+{
+    fp = new FormatParser();
+    dtMatcher = new DateTimeMatcher();
+    distanceInfo = new DistanceInfo();
+    patternMap = new PatternMap();
+    if (fp == NULL || dtMatcher == NULL || distanceInfo == NULL || patternMap == NULL) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+    }
+    else {
+        initData(locale, status);
+    }
+}
+
+DateTimePatternGenerator::DateTimePatternGenerator(const DateTimePatternGenerator& other) :
+    UObject(),
+    skipMatcher(NULL),
+    fAvailableFormatKeyHash(NULL)
+{
+    fp = new FormatParser();
+    dtMatcher = new DateTimeMatcher();
+    distanceInfo = new DistanceInfo();
+    patternMap = new PatternMap();
+    *this=other;
+}
+
+DateTimePatternGenerator&
+DateTimePatternGenerator::operator=(const DateTimePatternGenerator& other) {
+    pLocale = other.pLocale;
+    fDefaultHourFormatChar = other.fDefaultHourFormatChar;
+    *fp = *(other.fp);
+    dtMatcher->copyFrom(other.dtMatcher->skeleton);
+    *distanceInfo = *(other.distanceInfo);
+    dateTimeFormat = other.dateTimeFormat;
+    decimal = other.decimal;
+    // NUL-terminate for the C API.
+    dateTimeFormat.getTerminatedBuffer();
+    decimal.getTerminatedBuffer();
+    delete skipMatcher;
+    if ( other.skipMatcher == NULL ) {
+        skipMatcher = NULL;
+    }
+    else {
+        skipMatcher = new DateTimeMatcher(*other.skipMatcher);
+    }
+    for (int32_t i=0; i< UDATPG_FIELD_COUNT; ++i ) {
+        appendItemFormats[i] = other.appendItemFormats[i];
+        appendItemNames[i] = other.appendItemNames[i];
+        // NUL-terminate for the C API.
+        appendItemFormats[i].getTerminatedBuffer();
+        appendItemNames[i].getTerminatedBuffer();
+    }
+    UErrorCode status = U_ZERO_ERROR;
+    patternMap->copyFrom(*other.patternMap, status);
+    copyHashtable(other.fAvailableFormatKeyHash, status);
+    return *this;
+}
+
+
+UBool
+DateTimePatternGenerator::operator==(const DateTimePatternGenerator& other) const {
+    if (this == &other) {
+        return TRUE;
+    }
+    if ((pLocale==other.pLocale) && (patternMap->equals(*other.patternMap)) &&
+        (dateTimeFormat==other.dateTimeFormat) && (decimal==other.decimal)) {
+        for ( int32_t i=0 ; i<UDATPG_FIELD_COUNT; ++i ) {
+           if ((appendItemFormats[i] != other.appendItemFormats[i]) ||
+               (appendItemNames[i] != other.appendItemNames[i]) ) {
+               return FALSE;
+           }
+        }
+        return TRUE;
+    }
+    else {
+        return FALSE;
+    }
+}
+
+UBool
+DateTimePatternGenerator::operator!=(const DateTimePatternGenerator& other) const {
+    return  !operator==(other);
+}
+
+DateTimePatternGenerator::~DateTimePatternGenerator() {
+    if (fAvailableFormatKeyHash!=NULL) {
+        delete fAvailableFormatKeyHash;
+    }
+
+    if (fp != NULL) delete fp;
+    if (dtMatcher != NULL) delete dtMatcher;
+    if (distanceInfo != NULL) delete distanceInfo;
+    if (patternMap != NULL) delete patternMap;
+    if (skipMatcher != NULL) delete skipMatcher;
+}
+
+void
+DateTimePatternGenerator::initData(const Locale& locale, UErrorCode &status) {
+    //const char *baseLangName = locale.getBaseName(); // unused
+
+    skipMatcher = NULL;
+    fAvailableFormatKeyHash=NULL;
+    addCanonicalItems();
+    addICUPatterns(locale, status);
+    if (U_FAILURE(status)) {
+        return;
+    }
+    addCLDRData(locale, status);
+    setDateTimeFromCalendar(locale, status);
+    setDecimalSymbols(locale, status);
+} // DateTimePatternGenerator::initData
+
+UnicodeString
+DateTimePatternGenerator::getSkeleton(const UnicodeString& pattern, UErrorCode&
+/*status*/) {
+    dtMatcher->set(pattern, fp);
+    return dtMatcher->getSkeletonPtr()->getSkeleton();
+}
+
+UnicodeString
+DateTimePatternGenerator::getBaseSkeleton(const UnicodeString& pattern, UErrorCode& /*status*/) {
+    dtMatcher->set(pattern, fp);
+    return dtMatcher->getSkeletonPtr()->getBaseSkeleton();
+}
+
+void
+DateTimePatternGenerator::addICUPatterns(const Locale& locale, UErrorCode& status) {
+    UnicodeString dfPattern;
+    UnicodeString conflictingString;
+    UDateTimePatternConflict conflictingStatus;
+    DateFormat* df;
+
+    if (U_FAILURE(status)) {
+        return;
+    }
+
+    // Load with ICU patterns
+    for (int32_t i=DateFormat::kFull; i<=DateFormat::kShort; i++) {
+        DateFormat::EStyle style = (DateFormat::EStyle)i;
+        df = DateFormat::createDateInstance(style, locale);
+        SimpleDateFormat* sdf;
+        if (df != NULL && (sdf = dynamic_cast<SimpleDateFormat*>(df)) != NULL) {
+            conflictingStatus = addPattern(sdf->toPattern(dfPattern), FALSE, conflictingString, status);
+        }
+        // TODO Maybe we should return an error when the date format isn't simple.
+        delete df;
+        if (U_FAILURE(status)) {
+            return;
+        }
+
+        df = DateFormat::createTimeInstance(style, locale);
+        if (df != NULL && (sdf = dynamic_cast<SimpleDateFormat*>(df)) != NULL) {
+            conflictingStatus = addPattern(sdf->toPattern(dfPattern), FALSE, conflictingString, status);
+            // HACK for hh:ss
+            if ( i==DateFormat::kMedium ) {
+                hackPattern = dfPattern;
+            }
+        }
+        // TODO Maybe we should return an error when the date format isn't simple.
+        delete df;
+        if (U_FAILURE(status)) {
+            return;
+        }
+    }
+}
+
+void
+DateTimePatternGenerator::hackTimes(const UnicodeString& hackPattern, UErrorCode& status)  {
+    UDateTimePatternConflict conflictingStatus;
+    UnicodeString conflictingString;
+
+    fp->set(hackPattern);
+    UnicodeString mmss;
+    UBool gotMm=FALSE;
+    for (int32_t i=0; i<fp->itemNumber; ++i) {
+        UnicodeString field = fp->items[i];
+        if ( fp->isQuoteLiteral(field) ) {
+            if ( gotMm ) {
+               UnicodeString quoteLiteral;
+               fp->getQuoteLiteral(quoteLiteral, &i);
+               mmss += quoteLiteral;
+            }
+        }
+        else {
+            if (fp->isPatternSeparator(field) && gotMm) {
+                mmss+=field;
+            }
+            else {
+                UChar ch=field.charAt(0);
+                if (ch==LOW_M) {
+                    gotMm=TRUE;
+                    mmss+=field;
+                }
+                else {
+                    if (ch==LOW_S) {
+                        if (!gotMm) {
+                            break;
+                        }
+                        mmss+= field;
+                        conflictingStatus = addPattern(mmss, FALSE, conflictingString, status);
+                        break;
+                    }
+                    else {
+                        if (gotMm || ch==LOW_Z || ch==CAP_Z || ch==LOW_V || ch==CAP_V) {
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+#define ULOC_LOCALE_IDENTIFIER_CAPACITY (ULOC_FULLNAME_CAPACITY + 1 + ULOC_KEYWORD_AND_VALUES_CAPACITY)
+
+static const UChar hourFormatChars[] = { CAP_H, LOW_H, CAP_K, LOW_K, 0 }; // HhKk, the hour format characters
+
+void
+DateTimePatternGenerator::addCLDRData(const Locale& locale, UErrorCode& err) {
+    UResourceBundle *rb, *calTypeBundle, *calBundle;
+    UResourceBundle *patBundle, *fieldBundle, *fBundle;
+    UnicodeString rbPattern, value, field;
+    UnicodeString conflictingPattern;
+    UDateTimePatternConflict conflictingStatus;
+    const char *key=NULL;
+    int32_t i;
+
+    UnicodeString defaultItemFormat(TRUE, UDATPG_ItemFormat, LENGTHOF(UDATPG_ItemFormat)-1);  // Read-only alias.
+
+    err = U_ZERO_ERROR;
+    
+    fDefaultHourFormatChar = 0;
+    for (i=0; i<UDATPG_FIELD_COUNT; ++i ) {
+        appendItemNames[i]=CAP_F;
+        if (i<10) {
+            appendItemNames[i]+=(UChar)(i+0x30);
+        }
+        else {
+            appendItemNames[i]+=(UChar)0x31;
+            appendItemNames[i]+=(UChar)(i-10 + 0x30);
+        }
+        // NUL-terminate for the C API.
+        appendItemNames[i].getTerminatedBuffer();
+    }
+
+    rb = ures_open(NULL, locale.getName(), &err);
+    if (rb == NULL || U_FAILURE(err)) {
+        return;
+    }
+    const char *curLocaleName=ures_getLocaleByType(rb, ULOC_ACTUAL_LOCALE, &err);
+    const char * calendarTypeToUse = DT_DateTimeGregorianTag; // initial default
+    char         calendarType[ULOC_KEYWORDS_CAPACITY]; // to be filled in with the type to use, if all goes well
+    if ( U_SUCCESS(err) ) {
+        char    localeWithCalendarKey[ULOC_LOCALE_IDENTIFIER_CAPACITY];
+        // obtain a locale that always has the calendar key value that should be used
+        (void)ures_getFunctionalEquivalent(localeWithCalendarKey, ULOC_LOCALE_IDENTIFIER_CAPACITY, NULL,
+                                            "calendar", "calendar", locale.getName(), NULL, FALSE, &err);
+        localeWithCalendarKey[ULOC_LOCALE_IDENTIFIER_CAPACITY-1] = 0; // ensure null termination
+        // now get the calendar key value from that locale
+        int32_t calendarTypeLen = uloc_getKeywordValue(localeWithCalendarKey, "calendar", calendarType, ULOC_KEYWORDS_CAPACITY, &err);
+        if (U_SUCCESS(err) && calendarTypeLen < ULOC_KEYWORDS_CAPACITY) {
+            calendarTypeToUse = calendarType;
+        }
+        err = U_ZERO_ERROR;
+    }
+    calBundle = ures_getByKeyWithFallback(rb, DT_DateTimeCalendarTag, NULL, &err);
+    calTypeBundle = ures_getByKeyWithFallback(calBundle, calendarTypeToUse, NULL, &err);
+
+    key=NULL;
+    int32_t dtCount=0;
+    patBundle = ures_getByKeyWithFallback(calTypeBundle, DT_DateTimePatternsTag, NULL, &err);
+    while (U_SUCCESS(err)) {
+        rbPattern = ures_getNextUnicodeString(patBundle, &key, &err);
+        dtCount++;
+        if (rbPattern.length()==0 ) {
+            break;  // no more pattern
+        }
+        else {
+            if (dtCount==9) {
+                setDateTimeFormat(rbPattern);
+            } else if (dtCount==4) { // short time format
+                // set fDefaultHourFormatChar to the hour format character from this pattern
+                int32_t tfIdx, tfLen = rbPattern.length();
+                UBool ignoreChars = FALSE;
+                for (tfIdx = 0; tfIdx < tfLen; tfIdx++) {
+                    UChar tfChar = rbPattern.charAt(tfIdx);
+                    if ( tfChar == SINGLE_QUOTE ) {
+                        ignoreChars = !ignoreChars; // toggle (handle quoted literals & '' for single quote)
+                    } else if ( !ignoreChars && u_strchr(hourFormatChars, tfChar) != NULL ) {
+                        fDefaultHourFormatChar = tfChar;
+                        break;
+                    }
+                }
+            }
+        }
+    }
+    ures_close(patBundle);
+
+    err = U_ZERO_ERROR;
+    patBundle = ures_getByKeyWithFallback(calTypeBundle, DT_DateTimeAppendItemsTag, NULL, &err);
+    key=NULL;
+    UnicodeString itemKey;
+    while (U_SUCCESS(err)) {
+        rbPattern = ures_getNextUnicodeString(patBundle, &key, &err);
+        if (rbPattern.length()==0 ) {
+            break;  // no more pattern
+        }
+        else {
+            setAppendItemFormat(getAppendFormatNumber(key), rbPattern);
+        }
+    }
+    ures_close(patBundle);
+
+    key=NULL;
+    err = U_ZERO_ERROR;
+    fBundle = ures_getByKeyWithFallback(calTypeBundle, DT_DateTimeFieldsTag, NULL, &err);
+    for (i=0; i<MAX_RESOURCE_FIELD; ++i) {
+        err = U_ZERO_ERROR;
+        patBundle = ures_getByKeyWithFallback(fBundle, Resource_Fields[i], NULL, &err);
+        fieldBundle = ures_getByKeyWithFallback(patBundle, "dn", NULL, &err);
+        rbPattern = ures_getNextUnicodeString(fieldBundle, &key, &err);
+        ures_close(fieldBundle);
+        ures_close(patBundle);
+        if (rbPattern.length()==0 ) {
+            continue;
+        }
+        else {
+            setAppendItemName(getAppendNameNumber(Resource_Fields[i]), rbPattern);
+        }
+    }
+    ures_close(fBundle);
+
+    // add available formats
+    err = U_ZERO_ERROR;
+    initHashtable(err);
+    patBundle = ures_getByKeyWithFallback(calTypeBundle, DT_DateTimeAvailableFormatsTag, NULL, &err);
+    if (U_SUCCESS(err)) {
+        int32_t numberKeys = ures_getSize(patBundle);
+        int32_t len;
+        const UChar *retPattern;
+        key=NULL;
+#if defined(U_USE_ASCII_BUNDLE_ITERATOR)
+        UResourceBundleAIterator aiter;
+        ures_a_open(&aiter, patBundle, &err);
+#endif
+        for(i=0; i<numberKeys; ++i) {
+#if defined(U_USE_ASCII_BUNDLE_ITERATOR)
+            retPattern=ures_a_getNextString(&aiter, &len, &key, &err);
+#else
+            retPattern=ures_getNextString(patBundle, &len, &key, &err);
+#endif
+            UnicodeString format=UnicodeString(retPattern);
+            UnicodeString retKey=UnicodeString(key, -1, US_INV);
+            setAvailableFormat(retKey, err);
+            // Add pattern with its associated skeleton. Override any duplicate derived from std patterns,
+            // but not a previous availableFormats entry:
+            conflictingStatus = addPatternWithSkeleton(format, &retKey, TRUE, conflictingPattern, err);
+        }
+#if defined(U_USE_ASCII_BUNDLE_ITERATOR)
+        ures_a_close(&aiter);
+#endif
+    }
+    ures_close(patBundle);
+    ures_close(calTypeBundle);
+    ures_close(calBundle);
+    ures_close(rb);
+
+    err = U_ZERO_ERROR;
+    char parentLocale[50];
+    int32_t localeNameLen=0;
+    uprv_strcpy(parentLocale, curLocaleName);
+    while((localeNameLen=uloc_getParent(parentLocale, parentLocale, 50, &err))>=0 ) {
+        rb = ures_open(NULL, parentLocale, &err);
+        curLocaleName=ures_getLocaleByType(rb, ULOC_ACTUAL_LOCALE, &err);
+        uprv_strcpy(parentLocale, curLocaleName);
+        calBundle = ures_getByKey(rb, DT_DateTimeCalendarTag, NULL, &err);
+        calTypeBundle = ures_getByKey(calBundle, calendarTypeToUse, NULL, &err);
+        patBundle = ures_getByKeyWithFallback(calTypeBundle, DT_DateTimeAvailableFormatsTag, NULL, &err);
+        if (U_SUCCESS(err)) {
+            int32_t numberKeys = ures_getSize(patBundle);
+            int32_t len;
+            const UChar *retPattern;
+            key=NULL;
+#if defined(U_USE_ASCII_BUNDLE_ITERATOR)
+            UResourceBundleAIterator aiter;
+            ures_a_open(&aiter, patBundle, &err);
+#endif
+            for(i=0; i<numberKeys; ++i) {
+#if defined(U_USE_ASCII_BUNDLE_ITERATOR)
+                retPattern=ures_a_getNextString(&aiter, &len, &key, &err);
+#else
+                retPattern=ures_getNextString(patBundle, &len, &key, &err);
+#endif
+                UnicodeString format=UnicodeString(retPattern);
+                UnicodeString retKey=UnicodeString(key, -1, US_INV);
+                if ( !isAvailableFormatSet(retKey) ) {
+                    setAvailableFormat(retKey, err);
+                    // Add pattern with its associated skeleton. Override any duplicate derived from std patterns,
+                    // but not a previous availableFormats entry:
+                    conflictingStatus = addPatternWithSkeleton(format, &retKey, TRUE, conflictingPattern, err);
+                }
+            }
+#if defined(U_USE_ASCII_BUNDLE_ITERATOR)
+            ures_a_close(&aiter);
+#endif
+        }
+        err = U_ZERO_ERROR; // reset; if this locale lacks the necessary data, need to keep checking up to root.
+        ures_close(patBundle);
+        ures_close(calTypeBundle);
+        ures_close(calBundle);
+        ures_close(rb);
+        if (localeNameLen==0) {
+            break;
+        }
+    }
+
+    if (hackPattern.length()>0) {
+        hackTimes(hackPattern, err);
+    }
+}
+
+void
+DateTimePatternGenerator::initHashtable(UErrorCode& err) {
+    if (fAvailableFormatKeyHash!=NULL) {
+        return;
+    }
+    if ((fAvailableFormatKeyHash = new Hashtable(FALSE, err))==NULL) {
+        err=U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+}
+
+
+void
+DateTimePatternGenerator::setAppendItemFormat(UDateTimePatternField field, const UnicodeString& value) {
+    appendItemFormats[field] = value;
+    // NUL-terminate for the C API.
+    appendItemFormats[field].getTerminatedBuffer();
+}
+
+const UnicodeString&
+DateTimePatternGenerator::getAppendItemFormat(UDateTimePatternField field) const {
+    return appendItemFormats[field];
+}
+
+void
+DateTimePatternGenerator::setAppendItemName(UDateTimePatternField field, const UnicodeString& value) {
+    appendItemNames[field] = value;
+    // NUL-terminate for the C API.
+    appendItemNames[field].getTerminatedBuffer();
+}
+
+const UnicodeString&
+DateTimePatternGenerator:: getAppendItemName(UDateTimePatternField field) const {
+    return appendItemNames[field];
+}
+
+void
+DateTimePatternGenerator::getAppendName(UDateTimePatternField field, UnicodeString& value) {
+    value = SINGLE_QUOTE;
+    value += appendItemNames[field];
+    value += SINGLE_QUOTE;
+}
+
+UnicodeString
+DateTimePatternGenerator::getBestPattern(const UnicodeString& patternForm, UErrorCode& status) {
+    return getBestPattern(patternForm, UDATPG_MATCH_NO_OPTIONS, status);
+}
+
+UnicodeString
+DateTimePatternGenerator::getBestPattern(const UnicodeString& patternForm, UDateTimePatternMatchOptions options, UErrorCode& status) {
+    const UnicodeString *bestPattern=NULL;
+    UnicodeString dtFormat;
+    UnicodeString resultPattern;
+
+    int32_t dateMask=(1<<UDATPG_DAYPERIOD_FIELD) - 1;
+    int32_t timeMask=(1<<UDATPG_FIELD_COUNT) - 1 - dateMask;
+
+    UnicodeString patternFormCopy = UnicodeString(patternForm);
+    patternFormCopy.findAndReplace(UnicodeString(LOW_J), UnicodeString(fDefaultHourFormatChar));
+
+    resultPattern.remove();
+    dtMatcher->set(patternFormCopy, fp);
+    const PtnSkeleton* specifiedSkeleton=NULL;
+    bestPattern=getBestRaw(*dtMatcher, -1, distanceInfo, &specifiedSkeleton);
+    if ( distanceInfo->missingFieldMask==0 && distanceInfo->extraFieldMask==0 ) {
+        resultPattern = adjustFieldTypes(*bestPattern, specifiedSkeleton, FALSE, options);
+
+        return resultPattern;
+    }
+    int32_t neededFields = dtMatcher->getFieldMask();
+    UnicodeString datePattern=getBestAppending(neededFields & dateMask, options);
+    UnicodeString timePattern=getBestAppending(neededFields & timeMask, options);
+    if (datePattern.length()==0) {
+        if (timePattern.length()==0) {
+            resultPattern.remove();
+        }
+        else {
+            return timePattern;
+        }
+    }
+    if (timePattern.length()==0) {
+        return datePattern;
+    }
+    resultPattern.remove();
+    status = U_ZERO_ERROR;
+    dtFormat=getDateTimeFormat();
+    Formattable dateTimeObject[] = { timePattern, datePattern };
+    resultPattern = MessageFormat::format(dtFormat, dateTimeObject, 2, resultPattern, status );
+    return resultPattern;
+}
+
+UnicodeString
+DateTimePatternGenerator::replaceFieldTypes(const UnicodeString& pattern,
+                                            const UnicodeString& skeleton,
+                                            UErrorCode& status) {
+    return replaceFieldTypes(pattern, skeleton, UDATPG_MATCH_NO_OPTIONS, status);
+}
+
+UnicodeString
+DateTimePatternGenerator::replaceFieldTypes(const UnicodeString& pattern,
+                                            const UnicodeString& skeleton,
+                                            UDateTimePatternMatchOptions options,
+                                            UErrorCode& /*status*/) {
+    dtMatcher->set(skeleton, fp);
+    UnicodeString result = adjustFieldTypes(pattern, NULL, FALSE, options);
+    return result;
+}
+
+void
+DateTimePatternGenerator::setDecimal(const UnicodeString& newDecimal) {
+    this->decimal = newDecimal;
+    // NUL-terminate for the C API.
+    this->decimal.getTerminatedBuffer();
+}
+
+const UnicodeString&
+DateTimePatternGenerator::getDecimal() const {
+    return decimal;
+}
+
+void
+DateTimePatternGenerator::addCanonicalItems() {
+    UnicodeString  conflictingPattern;
+    UDateTimePatternConflict conflictingStatus;
+    UErrorCode status = U_ZERO_ERROR;
+
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; i++) {
+        conflictingStatus = addPattern(UnicodeString(Canonical_Items[i]), FALSE, conflictingPattern, status);
+    }
+}
+
+void
+DateTimePatternGenerator::setDateTimeFormat(const UnicodeString& dtFormat) {
+    dateTimeFormat = dtFormat;
+    // NUL-terminate for the C API.
+    dateTimeFormat.getTerminatedBuffer();
+}
+
+const UnicodeString&
+DateTimePatternGenerator::getDateTimeFormat() const {
+    return dateTimeFormat;
+}
+
+void
+DateTimePatternGenerator::setDateTimeFromCalendar(const Locale& locale, UErrorCode& status) {
+    const UChar *resStr;
+    int32_t resStrLen = 0;
+
+    Calendar* fCalendar = Calendar::createInstance(locale, status);
+    CalendarData calData(locale, fCalendar?fCalendar->getType():NULL, status);
+    UResourceBundle *dateTimePatterns = calData.getByKey(DT_DateTimePatternsTag, status);
+    if (U_FAILURE(status)) return;
+
+    if (ures_getSize(dateTimePatterns) <= DateFormat::kDateTime)
+    {
+        status = U_INVALID_FORMAT_ERROR;
+        return;
+    }
+    resStr = ures_getStringByIndex(dateTimePatterns, (int32_t)DateFormat::kDateTime, &resStrLen, &status);
+    setDateTimeFormat(UnicodeString(TRUE, resStr, resStrLen));
+
+    delete fCalendar;
+}
+
+void
+DateTimePatternGenerator::setDecimalSymbols(const Locale& locale, UErrorCode& status) {
+    DecimalFormatSymbols dfs = DecimalFormatSymbols(locale, status);
+    if(U_SUCCESS(status)) {
+        decimal = dfs.getSymbol(DecimalFormatSymbols::kDecimalSeparatorSymbol);
+        // NUL-terminate for the C API.
+        decimal.getTerminatedBuffer();
+    }
+}
+
+UDateTimePatternConflict
+DateTimePatternGenerator::addPattern(
+    const UnicodeString& pattern,
+    UBool override,
+    UnicodeString &conflictingPattern,
+    UErrorCode& status)
+{
+    return addPatternWithSkeleton(pattern, NULL, override, conflictingPattern, status);
+}
+
+// For DateTimePatternGenerator::addPatternWithSkeleton -
+// If skeletonToUse is specified, then an availableFormats entry is being added. In this case:
+// 1. We pass that skeleton to matcher.set instead of having it derive a skeleton from the pattern.
+// 2. If the new entry's skeleton or basePattern does match an existing entry but that entry also had a skeleton specified
+// (i.e. it was also from availableFormats), then the new entry does not override it regardless of the value of the override
+// parameter. This prevents later availableFormats entries from a parent locale overriding earlier ones from the actual
+// specified locale. However, availableFormats entries *should* override entries with matching skeleton whose skeleton was
+// derived (i.e. entries derived from the standard date/time patters for the specified locale).
+// 3. When adding the pattern (patternMap->add), we set a new boolean to indicate that the added entry had a
+// specified skeleton (which sets a new field in the PtnElem in the PatternMap).
+UDateTimePatternConflict
+DateTimePatternGenerator::addPatternWithSkeleton(
+    const UnicodeString& pattern,
+    const UnicodeString* skeletonToUse,
+    UBool override,
+    UnicodeString& conflictingPattern,
+    UErrorCode& status)
+{
+
+    UnicodeString basePattern;
+    PtnSkeleton   skeleton;
+    UDateTimePatternConflict conflictingStatus = UDATPG_NO_CONFLICT;
+
+    DateTimeMatcher matcher;
+    if ( skeletonToUse == NULL ) {
+        matcher.set(pattern, fp, skeleton);
+        matcher.getBasePattern(basePattern);
+    } else {
+        matcher.set(*skeletonToUse, fp, skeleton); // this still trims skeleton fields to max len 3, may need to change it.
+        matcher.getBasePattern(basePattern); // or perhaps instead: basePattern = *skeletonToUse;
+    }
+    UBool entryHadSpecifiedSkeleton;
+    const UnicodeString *duplicatePattern = patternMap->getPatternFromBasePattern(basePattern, entryHadSpecifiedSkeleton);
+    if (duplicatePattern != NULL ) {
+        conflictingStatus = UDATPG_BASE_CONFLICT;
+        conflictingPattern = *duplicatePattern;
+        if (!override || (skeletonToUse != NULL && entryHadSpecifiedSkeleton)) {
+            return conflictingStatus;
+        }
+    }
+    const PtnSkeleton* entrySpecifiedSkeleton = NULL;
+    duplicatePattern = patternMap->getPatternFromSkeleton(skeleton, &entrySpecifiedSkeleton);
+    if (duplicatePattern != NULL ) {
+        conflictingStatus = UDATPG_CONFLICT;
+        conflictingPattern = *duplicatePattern;
+        if (!override || (skeletonToUse != NULL && entrySpecifiedSkeleton != NULL)) {
+            return conflictingStatus;
+        }
+    }
+    patternMap->add(basePattern, skeleton, pattern, skeletonToUse != NULL, status);
+    if(U_FAILURE(status)) {
+        return conflictingStatus;
+    }
+
+    return UDATPG_NO_CONFLICT;
+}
+
+
+UDateTimePatternField
+DateTimePatternGenerator::getAppendFormatNumber(const char* field) const {
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i ) {
+        if (uprv_strcmp(CLDR_FIELD_APPEND[i], field)==0) {
+            return (UDateTimePatternField)i;
+        }
+    }
+    return UDATPG_FIELD_COUNT;
+}
+
+UDateTimePatternField
+DateTimePatternGenerator::getAppendNameNumber(const char* field) const {
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i ) {
+        if (uprv_strcmp(CLDR_FIELD_NAME[i],field)==0) {
+            return (UDateTimePatternField)i;
+        }
+    }
+    return UDATPG_FIELD_COUNT;
+}
+
+const UnicodeString*
+DateTimePatternGenerator::getBestRaw(DateTimeMatcher& source,
+                                     int32_t includeMask,
+                                     DistanceInfo* missingFields,
+                                     const PtnSkeleton** specifiedSkeletonPtr) {
+    int32_t bestDistance = 0x7fffffff;
+    DistanceInfo tempInfo;
+    const UnicodeString *bestPattern=NULL;
+    const PtnSkeleton* specifiedSkeleton=NULL;
+
+    PatternMapIterator it;
+    for (it.set(*patternMap); it.hasNext(); ) {
+        DateTimeMatcher trial = it.next();
+        if (trial.equals(skipMatcher)) {
+            continue;
+        }
+        int32_t distance=source.getDistance(trial, includeMask, tempInfo);
+        if (distance<bestDistance) {
+            bestDistance=distance;
+            bestPattern=patternMap->getPatternFromSkeleton(*trial.getSkeletonPtr(), &specifiedSkeleton);
+            missingFields->setTo(tempInfo);
+            if (distance==0) {
+                break;
+            }
+        }
+    }
+
+    // If the best raw match had a specified skeleton and that skeleton was requested by the caller,
+    // then return it too. This generally happens when the caller needs to pass that skeleton
+    // through to adjustFieldTypes so the latter can do a better job.
+    if (bestPattern && specifiedSkeletonPtr) {
+        *specifiedSkeletonPtr = specifiedSkeleton;
+    }
+    return bestPattern;
+}
+
+UnicodeString
+DateTimePatternGenerator::adjustFieldTypes(const UnicodeString& pattern,
+                                           const PtnSkeleton* specifiedSkeleton,
+                                           UBool fixFractionalSeconds,
+                                           UDateTimePatternMatchOptions options) {
+    UnicodeString newPattern;
+    fp->set(pattern);
+    for (int32_t i=0; i < fp->itemNumber; i++) {
+        UnicodeString field = fp->items[i];
+        if ( fp->isQuoteLiteral(field) ) {
+
+            UnicodeString quoteLiteral;
+            fp->getQuoteLiteral(quoteLiteral, &i);
+            newPattern += quoteLiteral;
+        }
+        else {
+            if (fp->isPatternSeparator(field)) {
+                newPattern+=field;
+                continue;
+            }
+            int32_t canonicalIndex = fp->getCanonicalIndex(field);
+            if (canonicalIndex < 0) {
+                newPattern+=field;
+                continue;  // don't adjust
+            }
+            const dtTypeElem *row = &dtTypes[canonicalIndex];
+            int32_t typeValue = row->field;
+            if (fixFractionalSeconds && typeValue == UDATPG_SECOND_FIELD) {
+                UnicodeString newField=dtMatcher->skeleton.original[UDATPG_FRACTIONAL_SECOND_FIELD];
+                field = field + decimal + newField;
+            }
+            else {
+                if (dtMatcher->skeleton.type[typeValue]!=0) {
+                    // Here:
+                    // - "reqField" is the field from the originally requested skeleton, with length
+                    // "reqFieldLen".
+                    // - "field" is the field from the found pattern.
+                    //
+                    // The adjusted field should consist of characters from the originally requested
+                    // skeleton, except in the case of UDATPG_HOUR_FIELD or UDATPG_MONTH_FIELD or
+                    // UDATPG_WEEKDAY_FIELD, in which case it should consist of characters from the
+                    // found pattern.
+                    //
+                    // The length of the adjusted field (adjFieldLen) should match that in the originally
+                    // requested skeleton, except that in the following cases the length of the adjusted field
+                    // should match that in the found pattern (i.e. the length of this pattern field should
+                    // not be adjusted):
+                    // 1. typeValue is UDATPG_HOUR_FIELD/MINUTE/SECOND and the corresponding bit in options is
+                    //    not set (ticket #7180). Note, we may want to implement a similar change for other
+                    //    numeric fields (MM, dd, etc.) so the default behavior is to get locale preference for
+                    //    field length, but options bits can be used to override this.
+                    // 2. There is a specified skeleton for the found pattern and one of the following is true:
+                    //    a) The length of the field in the skeleton (skelFieldLen) is equal to reqFieldLen.
+                    //    b) The pattern field is numeric and the skeleton field is not, or vice versa.
+
+                    UnicodeString reqField = dtMatcher->skeleton.original[typeValue];
+                    int32_t reqFieldLen = reqField.length();
+                    if (reqField.charAt(0) == CAP_E && reqFieldLen < 3)
+                        reqFieldLen = 3; // 1-3 for E are equivalent to 3 for c,e
+                    int32_t adjFieldLen = reqFieldLen;
+                    if ( (typeValue==UDATPG_HOUR_FIELD && (options & UDATPG_MATCH_HOUR_FIELD_LENGTH)==0) ||
+                         (typeValue==UDATPG_MINUTE_FIELD && (options & UDATPG_MATCH_MINUTE_FIELD_LENGTH)==0) ||
+                         (typeValue==UDATPG_SECOND_FIELD && (options & UDATPG_MATCH_SECOND_FIELD_LENGTH)==0) ) {
+                         adjFieldLen = field.length();
+                    } else if (specifiedSkeleton) {
+                        UnicodeString skelField = specifiedSkeleton->original[typeValue];
+                        int32_t skelFieldLen = skelField.length();
+                        UBool patFieldIsNumeric = (row->type > 0);
+                        UBool skelFieldIsNumeric = (specifiedSkeleton->type[typeValue] > 0);
+                        if (skelFieldLen == reqFieldLen || (patFieldIsNumeric && !skelFieldIsNumeric) || (skelFieldIsNumeric && !patFieldIsNumeric)) {
+                            // don't adjust the field length in the found pattern
+                            adjFieldLen = field.length();
+                        }
+                    }
+                    UChar c = (typeValue!= UDATPG_HOUR_FIELD && typeValue!= UDATPG_MONTH_FIELD && typeValue!= UDATPG_WEEKDAY_FIELD)?
+                        reqField.charAt(0): field.charAt(0);
+                    field.remove();
+                    for (int32_t i=adjFieldLen; i>0; --i) {
+                        field+=c;
+                    }
+                }
+                newPattern+=field;
+            }
+        }
+    }
+    return newPattern;
+}
+
+UnicodeString
+DateTimePatternGenerator::getBestAppending(int32_t missingFields, UDateTimePatternMatchOptions options) {
+    UnicodeString  resultPattern, tempPattern, formattedPattern;
+    UErrorCode err=U_ZERO_ERROR;
+    int32_t lastMissingFieldMask=0;
+    if (missingFields!=0) {
+        resultPattern=UnicodeString();
+        const PtnSkeleton* specifiedSkeleton=NULL;
+        tempPattern = *getBestRaw(*dtMatcher, missingFields, distanceInfo, &specifiedSkeleton);
+        resultPattern = adjustFieldTypes(tempPattern, specifiedSkeleton, FALSE, options);
+        if ( distanceInfo->missingFieldMask==0 ) {
+            return resultPattern;
+        }
+        while (distanceInfo->missingFieldMask!=0) { // precondition: EVERY single field must work!
+            if ( lastMissingFieldMask == distanceInfo->missingFieldMask ) {
+                break;  // cannot find the proper missing field
+            }
+            if (((distanceInfo->missingFieldMask & UDATPG_SECOND_AND_FRACTIONAL_MASK)==UDATPG_FRACTIONAL_MASK) &&
+                ((missingFields & UDATPG_SECOND_AND_FRACTIONAL_MASK) == UDATPG_SECOND_AND_FRACTIONAL_MASK)) {
+                resultPattern = adjustFieldTypes(resultPattern, specifiedSkeleton, FALSE, options);
+                //resultPattern = tempPattern;
+                distanceInfo->missingFieldMask &= ~UDATPG_FRACTIONAL_MASK;
+                continue;
+            }
+            int32_t startingMask = distanceInfo->missingFieldMask;
+            tempPattern = *getBestRaw(*dtMatcher, distanceInfo->missingFieldMask, distanceInfo, &specifiedSkeleton);
+            tempPattern = adjustFieldTypes(tempPattern, specifiedSkeleton, FALSE, options);
+            int32_t foundMask=startingMask& ~distanceInfo->missingFieldMask;
+            int32_t topField=getTopBitNumber(foundMask);
+            UnicodeString appendName;
+            getAppendName((UDateTimePatternField)topField, appendName);
+            const Formattable formatPattern[] = {
+                resultPattern,
+                tempPattern,
+                appendName
+            };
+            UnicodeString emptyStr;
+            formattedPattern = MessageFormat::format(appendItemFormats[topField], formatPattern, 3, emptyStr, err);
+            lastMissingFieldMask = distanceInfo->missingFieldMask;
+        }
+    }
+    return formattedPattern;
+}
+
+int32_t
+DateTimePatternGenerator::getTopBitNumber(int32_t foundMask) {
+    if ( foundMask==0 ) {
+        return 0;
+    }
+    int32_t i=0;
+    while (foundMask!=0) {
+        foundMask >>=1;
+        ++i;
+    }
+    if (i-1 >UDATPG_ZONE_FIELD) {
+        return UDATPG_ZONE_FIELD;
+    }
+    else
+        return i-1;
+}
+
+void
+DateTimePatternGenerator::setAvailableFormat(const UnicodeString &key, UErrorCode& err)
+{
+    fAvailableFormatKeyHash->puti(key, 1, err);
+}
+
+UBool
+DateTimePatternGenerator::isAvailableFormatSet(const UnicodeString &key) const {
+    return (UBool)(fAvailableFormatKeyHash->geti(key) == 1);
+}
+
+void
+DateTimePatternGenerator::copyHashtable(Hashtable *other, UErrorCode &status) {
+
+    if (other == NULL) {
+        return;
+    }
+    if (fAvailableFormatKeyHash != NULL) {
+        delete fAvailableFormatKeyHash;
+        fAvailableFormatKeyHash = NULL;
+    }
+    initHashtable(status);
+    if(U_FAILURE(status)){
+        return;
+    }
+    int32_t pos = -1;
+    const UHashElement* elem = NULL;
+    // walk through the hash table and create a deep clone
+    while((elem = other->nextElement(pos))!= NULL){
+        const UHashTok otherKeyTok = elem->key;
+        UnicodeString* otherKey = (UnicodeString*)otherKeyTok.pointer;
+        fAvailableFormatKeyHash->puti(*otherKey, 1, status);
+        if(U_FAILURE(status)){
+            return;
+        }
+    }
+}
+
+StringEnumeration*
+DateTimePatternGenerator::getSkeletons(UErrorCode& status) const {
+    StringEnumeration* skeletonEnumerator = new DTSkeletonEnumeration(*patternMap, DT_SKELETON, status);
+    return skeletonEnumerator;
+}
+
+const UnicodeString&
+DateTimePatternGenerator::getPatternForSkeleton(const UnicodeString& skeleton) const {
+    PtnElem *curElem;
+
+    if (skeleton.length() ==0) {
+        return emptyString;
+    }
+    curElem = patternMap->getHeader(skeleton.charAt(0));
+    while ( curElem != NULL ) {
+        if ( curElem->skeleton->getSkeleton()==skeleton ) {
+            return curElem->pattern;
+        }
+        curElem=curElem->next;
+    }
+    return emptyString;
+}
+
+StringEnumeration*
+DateTimePatternGenerator::getBaseSkeletons(UErrorCode& status) const {
+    StringEnumeration* baseSkeletonEnumerator = new DTSkeletonEnumeration(*patternMap, DT_BASESKELETON, status);
+    return baseSkeletonEnumerator;
+}
+
+StringEnumeration*
+DateTimePatternGenerator::getRedundants(UErrorCode& status) {
+    StringEnumeration* output = new DTRedundantEnumeration();
+    const UnicodeString *pattern;
+    PatternMapIterator it;
+    for (it.set(*patternMap); it.hasNext(); ) {
+        DateTimeMatcher current = it.next();
+        pattern = patternMap->getPatternFromSkeleton(*(it.getSkeleton()));
+        if ( isCanonicalItem(*pattern) ) {
+            continue;
+        }
+        if ( skipMatcher == NULL ) {
+            skipMatcher = new DateTimeMatcher(current);
+        }
+        else {
+            *skipMatcher = current;
+        }
+        UnicodeString trial = getBestPattern(current.getPattern(), status);
+        if (trial == *pattern) {
+            ((DTRedundantEnumeration *)output)->add(*pattern, status);
+        }
+        if (current.equals(skipMatcher)) {
+            continue;
+        }
+    }
+    return output;
+}
+
+UBool
+DateTimePatternGenerator::isCanonicalItem(const UnicodeString& item) const {
+    if ( item.length() != 1 ) {
+        return FALSE;
+    }
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        if (item.charAt(0)==Canonical_Items[i]) {
+            return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+
+DateTimePatternGenerator*
+DateTimePatternGenerator::clone() const {
+    return new DateTimePatternGenerator(*this);
+}
+
+PatternMap::PatternMap() {
+   for (int32_t i=0; i < MAX_PATTERN_ENTRIES; ++i ) {
+      boot[i]=NULL;
+   }
+   isDupAllowed = TRUE;
+}
+
+void
+PatternMap::copyFrom(const PatternMap& other, UErrorCode& status) {
+    this->isDupAllowed = other.isDupAllowed;
+    for (int32_t bootIndex=0; bootIndex<MAX_PATTERN_ENTRIES; ++bootIndex ) {
+        PtnElem *curElem, *otherElem, *prevElem=NULL;
+        otherElem = other.boot[bootIndex];
+        while (otherElem!=NULL) {
+            if ((curElem = new PtnElem(otherElem->basePattern, otherElem->pattern))==NULL) {
+                // out of memory
+                status = U_MEMORY_ALLOCATION_ERROR;
+                return;
+            }
+            if ( this->boot[bootIndex]== NULL ) {
+                this->boot[bootIndex] = curElem;
+            }
+            if ((curElem->skeleton=new PtnSkeleton(*(otherElem->skeleton))) == NULL ) {
+                // out of memory
+                status = U_MEMORY_ALLOCATION_ERROR;
+                return;
+            }
+
+            if (prevElem!=NULL) {
+                prevElem->next=curElem;
+            }
+            curElem->next=NULL;
+            prevElem = curElem;
+            otherElem = otherElem->next;
+        }
+
+    }
+}
+
+PtnElem*
+PatternMap::getHeader(UChar baseChar) {
+    PtnElem* curElem;
+
+    if ( (baseChar >= CAP_A) && (baseChar <= CAP_Z) ) {
+         curElem = boot[baseChar-CAP_A];
+    }
+    else {
+        if ( (baseChar >=LOW_A) && (baseChar <= LOW_Z) ) {
+            curElem = boot[26+baseChar-LOW_A];
+        }
+        else {
+            return NULL;
+        }
+    }
+    return curElem;
+}
+
+PatternMap::~PatternMap() {
+   for (int32_t i=0; i < MAX_PATTERN_ENTRIES; ++i ) {
+       if (boot[i]!=NULL ) {
+           delete boot[i];
+           boot[i]=NULL;
+       }
+   }
+}  // PatternMap destructor
+
+void
+PatternMap::add(const UnicodeString& basePattern,
+                const PtnSkeleton& skeleton,
+                const UnicodeString& value,// mapped pattern value
+                UBool skeletonWasSpecified,
+                UErrorCode &status) {
+    UChar baseChar = basePattern.charAt(0);
+    PtnElem *curElem, *baseElem;
+    status = U_ZERO_ERROR;
+
+    // the baseChar must be A-Z or a-z
+    if ((baseChar >= CAP_A) && (baseChar <= CAP_Z)) {
+        baseElem = boot[baseChar-CAP_A];
+    }
+    else {
+        if ((baseChar >=LOW_A) && (baseChar <= LOW_Z)) {
+            baseElem = boot[26+baseChar-LOW_A];
+         }
+         else {
+             status = U_ILLEGAL_CHARACTER;
+             return;
+         }
+    }
+
+    if (baseElem == NULL) {
+        if ((curElem = new PtnElem(basePattern, value)) == NULL ) {
+            // out of memory
+            status = U_MEMORY_ALLOCATION_ERROR;
+            return;
+        }
+        if (baseChar >= LOW_A) {
+            boot[26 + (baseChar-LOW_A)] = curElem;
+        }
+        else {
+            boot[baseChar-CAP_A] = curElem;
+        }
+        curElem->skeleton = new PtnSkeleton(skeleton);
+        curElem->skeletonWasSpecified = skeletonWasSpecified;
+    }
+    if ( baseElem != NULL ) {
+        curElem = getDuplicateElem(basePattern, skeleton, baseElem);
+
+        if (curElem == NULL) {
+            // add new element to the list.
+            curElem = baseElem;
+            while( curElem -> next != NULL )
+            {
+                curElem = curElem->next;
+            }
+            if ((curElem->next = new PtnElem(basePattern, value)) == NULL ) {
+                // out of memory
+                status = U_MEMORY_ALLOCATION_ERROR;
+                return;
+            }
+            curElem=curElem->next;
+            curElem->skeleton = new PtnSkeleton(skeleton);
+            curElem->skeletonWasSpecified = skeletonWasSpecified;
+        }
+        else {
+            // Pattern exists in the list already.
+            if ( !isDupAllowed ) {
+                return;
+            }
+            // Overwrite the value.
+            curElem->pattern = value;
+        }
+    }
+}  // PatternMap::add
+
+// Find the pattern from the given basePattern string.
+const UnicodeString *
+PatternMap::getPatternFromBasePattern(UnicodeString& basePattern, UBool& skeletonWasSpecified) { // key to search for
+   PtnElem *curElem;
+
+   if ((curElem=getHeader(basePattern.charAt(0)))==NULL) {
+       return NULL;  // no match
+   }
+
+   do  {
+       if ( basePattern.compare(curElem->basePattern)==0 ) {
+          skeletonWasSpecified = curElem->skeletonWasSpecified;
+          return &(curElem->pattern);
+       }
+       curElem=curElem->next;
+   }while (curElem != NULL);
+
+   return NULL;
+}  // PatternMap::getFromBasePattern
+
+
+// Find the pattern from the given skeleton.
+// At least when this is called from getBestRaw & addPattern (in which case specifiedSkeletonPtr is non-NULL),
+// the comparison should be based on skeleton.original (which is unique and tied to the distance measurement in bestRaw)
+// and not skeleton.baseOriginal (which is not unique); otherwise we may pick a different skeleton than the one with the
+// optimum distance value in getBestRaw. When this is called from public getRedundants (specifiedSkeletonPtr is NULL),
+// for now it will continue to compare based on baseOriginal so as not to change the behavior unnecessarily.
+const UnicodeString *
+PatternMap::getPatternFromSkeleton(PtnSkeleton& skeleton, const PtnSkeleton** specifiedSkeletonPtr) { // key to search for
+   PtnElem *curElem;
+
+   if (specifiedSkeletonPtr) {
+       *specifiedSkeletonPtr = NULL;
+   }
+
+   // find boot entry
+   UChar baseChar='\0';
+   for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+       if (skeleton.baseOriginal[i].length() !=0 ) {
+           baseChar = skeleton.baseOriginal[i].charAt(0);
+           break;
+       }
+   }
+
+   if ((curElem=getHeader(baseChar))==NULL) {
+       return NULL;  // no match
+   }
+
+   do  {
+       int32_t i=0;
+       if (specifiedSkeletonPtr != NULL) { // called from DateTimePatternGenerator::getBestRaw or addPattern, use original
+           for (i=0; i<UDATPG_FIELD_COUNT; ++i) {
+               if (curElem->skeleton->original[i].compare(skeleton.original[i]) != 0 )
+               {
+                   break;
+               }
+           }
+       } else { // called from DateTimePatternGenerator::getRedundants, use baseOriginal
+           for (i=0; i<UDATPG_FIELD_COUNT; ++i) {
+               if (curElem->skeleton->baseOriginal[i].compare(skeleton.baseOriginal[i]) != 0 )
+               {
+                   break;
+               }
+           }
+       }
+       if (i == UDATPG_FIELD_COUNT) {
+           if (specifiedSkeletonPtr && curElem->skeletonWasSpecified) {
+               *specifiedSkeletonPtr = curElem->skeleton;
+           }
+           return &(curElem->pattern);
+       }
+       curElem=curElem->next;
+   }while (curElem != NULL);
+
+   return NULL;
+}
+
+UBool
+PatternMap::equals(const PatternMap& other) {
+    if ( this==&other ) {
+        return TRUE;
+    }
+    for (int32_t bootIndex=0; bootIndex<MAX_PATTERN_ENTRIES; ++bootIndex ) {
+        if ( boot[bootIndex]==other.boot[bootIndex] ) {
+            continue;
+        }
+        if ( (boot[bootIndex]==NULL)||(other.boot[bootIndex]==NULL) ) {
+            return FALSE;
+        }
+        PtnElem *otherElem = other.boot[bootIndex];
+        PtnElem *myElem = boot[bootIndex];
+        while ((otherElem!=NULL) || (myElem!=NULL)) {
+            if ( myElem == otherElem ) {
+                break;
+            }
+            if ((otherElem==NULL) || (myElem==NULL)) {
+                return FALSE;
+            }
+            if ( (myElem->basePattern != otherElem->basePattern) ||
+                 (myElem->pattern != otherElem->pattern) ) {
+                return FALSE;
+            }
+            if ((myElem->skeleton!=otherElem->skeleton)&&
+                !myElem->skeleton->equals(*(otherElem->skeleton))) {
+                return FALSE;
+            }
+            myElem = myElem->next;
+            otherElem=otherElem->next;
+        }
+    }
+    return TRUE;
+}
+
+// find any key existing in the mapping table already.
+// return TRUE if there is an existing key, otherwise return FALSE.
+PtnElem*
+PatternMap::getDuplicateElem(
+            const UnicodeString &basePattern,
+            const PtnSkeleton &skeleton,
+            PtnElem *baseElem)  {
+   PtnElem *curElem;
+
+   if ( baseElem == (PtnElem *)NULL )  {
+         return (PtnElem*)NULL;
+   }
+   else {
+         curElem = baseElem;
+   }
+   do {
+     if ( basePattern.compare(curElem->basePattern)==0 ) {
+        UBool isEqual=TRUE;
+        for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+            if (curElem->skeleton->type[i] != skeleton.type[i] ) {
+                isEqual=FALSE;
+                break;
+            }
+        }
+        if (isEqual) {
+            return curElem;
+        }
+     }
+     curElem = curElem->next;
+   } while( curElem != (PtnElem *)NULL );
+
+   // end of the list
+   return (PtnElem*)NULL;
+
+}  // PatternMap::getDuplicateElem
+
+DateTimeMatcher::DateTimeMatcher(void) {
+}
+
+DateTimeMatcher::DateTimeMatcher(const DateTimeMatcher& other) {
+    copyFrom(other.skeleton);
+}
+
+
+void
+DateTimeMatcher::set(const UnicodeString& pattern, FormatParser* fp) {
+    PtnSkeleton localSkeleton;
+    return set(pattern, fp, localSkeleton);
+}
+
+void
+DateTimeMatcher::set(const UnicodeString& pattern, FormatParser* fp, PtnSkeleton& skeletonResult) {
+    int32_t i;
+    for (i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        skeletonResult.type[i]=NONE;
+    }
+    fp->set(pattern);
+    for (i=0; i < fp->itemNumber; i++) {
+        UnicodeString field = fp->items[i];
+        if ( field.charAt(0) == LOW_A ) {
+            continue;  // skip 'a'
+        }
+
+        if ( fp->isQuoteLiteral(field) ) {
+            UnicodeString quoteLiteral;
+            fp->getQuoteLiteral(quoteLiteral, &i);
+            continue;
+        }
+        int32_t canonicalIndex = fp->getCanonicalIndex(field);
+        if (canonicalIndex < 0 ) {
+            continue;
+        }
+        const dtTypeElem *row = &dtTypes[canonicalIndex];
+        int32_t typeValue = row->field;
+        skeletonResult.original[typeValue]=field;
+        UChar repeatChar = row->patternChar;
+        int32_t repeatCount = row->minLen > 3 ? 3: row->minLen;
+        while (repeatCount-- > 0) {
+            skeletonResult.baseOriginal[typeValue] += repeatChar;
+        }
+        int16_t subTypeValue = row->type;
+        if ( row->type > 0) {
+            subTypeValue += field.length();
+        }
+        skeletonResult.type[typeValue] = subTypeValue;
+    }
+    copyFrom(skeletonResult);
+}
+
+void
+DateTimeMatcher::getBasePattern(UnicodeString &result ) {
+    result.remove(); // Reset the result first.
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i ) {
+        if (skeleton.baseOriginal[i].length()!=0) {
+            result += skeleton.baseOriginal[i];
+        }
+    }
+}
+
+UnicodeString
+DateTimeMatcher::getPattern() {
+    UnicodeString result;
+
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i ) {
+        if (skeleton.original[i].length()!=0) {
+            result += skeleton.original[i];
+        }
+    }
+    return result;
+}
+
+int32_t
+DateTimeMatcher::getDistance(const DateTimeMatcher& other, int32_t includeMask, DistanceInfo& distanceInfo) {
+    int32_t result=0;
+    distanceInfo.clear();
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i ) {
+        int32_t myType = (includeMask&(1<<i))==0 ? 0 : skeleton.type[i];
+        int32_t otherType = other.skeleton.type[i];
+        if (myType==otherType) {
+            continue;
+        }
+        if (myType==0) {// and other is not
+            result += EXTRA_FIELD;
+            distanceInfo.addExtra(i);
+        }
+        else {
+            if (otherType==0) {
+                result += MISSING_FIELD;
+                distanceInfo.addMissing(i);
+            }
+            else {
+                result += abs(myType - otherType);
+            }
+        }
+
+    }
+    return result;
+}
+
+void
+DateTimeMatcher::copyFrom(const PtnSkeleton& newSkeleton) {
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        this->skeleton.type[i]=newSkeleton.type[i];
+        this->skeleton.original[i]=newSkeleton.original[i];
+        this->skeleton.baseOriginal[i]=newSkeleton.baseOriginal[i];
+    }
+}
+
+void
+DateTimeMatcher::copyFrom() {
+    // same as clear
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        this->skeleton.type[i]=0;
+        this->skeleton.original[i].remove();
+        this->skeleton.baseOriginal[i].remove();
+    }
+}
+
+UBool
+DateTimeMatcher::equals(const DateTimeMatcher* other) const {
+    if (other==NULL) {
+        return FALSE;
+    }
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        if (this->skeleton.original[i]!=other->skeleton.original[i] ) {
+            return FALSE;
+        }
+    }
+    return TRUE;
+}
+
+int32_t
+DateTimeMatcher::getFieldMask() {
+    int32_t result=0;
+
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        if (skeleton.type[i]!=0) {
+            result |= (1<<i);
+        }
+    }
+    return result;
+}
+
+PtnSkeleton*
+DateTimeMatcher::getSkeletonPtr() {
+    return &skeleton;
+}
+
+FormatParser::FormatParser () {
+    status = START;
+    itemNumber=0;
+}
+
+
+FormatParser::~FormatParser () {
+}
+
+
+// Find the next token with the starting position and length
+// Note: the startPos may
+FormatParser::TokenStatus
+FormatParser::setTokens(const UnicodeString& pattern, int32_t startPos, int32_t *len) {
+    int32_t  curLoc = startPos;
+    if ( curLoc >= pattern.length()) {
+        return DONE;
+    }
+    // check the current char is between A-Z or a-z
+    do {
+        UChar c=pattern.charAt(curLoc);
+        if ( (c>=CAP_A && c<=CAP_Z) || (c>=LOW_A && c<=LOW_Z) ) {
+           curLoc++;
+        }
+        else {
+               startPos = curLoc;
+               *len=1;
+               return ADD_TOKEN;
+        }
+
+        if ( pattern.charAt(curLoc)!= pattern.charAt(startPos) ) {
+            break;  // not the same token
+        }
+    } while(curLoc <= pattern.length());
+    *len = curLoc-startPos;
+    return ADD_TOKEN;
+}
+
+void
+FormatParser::set(const UnicodeString& pattern) {
+    int32_t startPos=0;
+    TokenStatus result=START;
+    int32_t len=0;
+    itemNumber =0;
+
+    do {
+        result = setTokens( pattern, startPos, &len );
+        if ( result == ADD_TOKEN )
+        {
+            items[itemNumber++] = UnicodeString(pattern, startPos, len );
+            startPos += len;
+        }
+        else {
+            break;
+        }
+    } while (result==ADD_TOKEN && itemNumber < MAX_DT_TOKEN);
+}
+
+int32_t
+FormatParser::getCanonicalIndex(const UnicodeString& s, UBool strict) {
+    int32_t len = s.length();
+    if (len == 0) {
+        return -1;
+    }
+    UChar ch = s.charAt(0);
+
+    // Verify that all are the same character.
+    for (int32_t l = 1; l < len; l++) {
+        if (ch != s.charAt(l)) {
+            return -1;
+        }
+    }
+    int32_t i = 0;
+    int32_t bestRow = -1;
+    while (dtTypes[i].patternChar != '\0') {
+        if ( dtTypes[i].patternChar != ch ) {
+            ++i;
+            continue;
+        }
+        bestRow = i;
+        if (dtTypes[i].patternChar != dtTypes[i+1].patternChar) {
+            return i;
+        }
+        if (dtTypes[i+1].minLen <= len) {
+            ++i;
+            continue;
+        }
+        return i;
+    }
+    return strict ? -1 : bestRow;
+}
+
+UBool
+FormatParser::isQuoteLiteral(const UnicodeString& s) const {
+    return (UBool)(s.charAt(0)==SINGLE_QUOTE);
+}
+
+// This function aussumes the current itemIndex points to the quote literal.
+// Please call isQuoteLiteral prior to this function.
+void
+FormatParser::getQuoteLiteral(UnicodeString& quote, int32_t *itemIndex) {
+    int32_t i=*itemIndex;
+
+    quote.remove();
+    if (items[i].charAt(0)==SINGLE_QUOTE) {
+        quote += items[i];
+        ++i;
+    }
+    while ( i < itemNumber ) {
+        if ( items[i].charAt(0)==SINGLE_QUOTE ) {
+            if ( (i+1<itemNumber) && (items[i+1].charAt(0)==SINGLE_QUOTE)) {
+                // two single quotes e.g. 'o''clock'
+                quote += items[i++];
+                quote += items[i++];
+                continue;
+            }
+            else {
+                quote += items[i];
+                break;
+            }
+        }
+        else {
+            quote += items[i];
+        }
+        ++i;
+    }
+    *itemIndex=i;
+}
+
+UBool
+FormatParser::isPatternSeparator(UnicodeString& field) {
+    for (int32_t i=0; i<field.length(); ++i ) {
+        UChar c= field.charAt(i);
+        if ( (c==SINGLE_QUOTE) || (c==BACKSLASH) || (c==SPACE) || (c==COLON) ||
+             (c==QUOTATION_MARK) || (c==COMMA) || (c==HYPHEN) ||(items[i].charAt(0)==DOT) ) {
+            continue;
+        }
+        else {
+            return FALSE;
+        }
+    }
+    return TRUE;
+}
+
+void
+DistanceInfo::setTo(DistanceInfo &other) {
+    missingFieldMask = other.missingFieldMask;
+    extraFieldMask= other.extraFieldMask;
+}
+
+PatternMapIterator::PatternMapIterator() {
+    bootIndex = 0;
+    nodePtr = NULL;
+    patternMap=NULL;
+    matcher= new DateTimeMatcher();
+}
+
+
+PatternMapIterator::~PatternMapIterator() {
+    delete matcher;
+}
+
+void
+PatternMapIterator::set(PatternMap& newPatternMap) {
+    this->patternMap=&newPatternMap;
+}
+
+PtnSkeleton*
+PatternMapIterator::getSkeleton() {
+    if ( nodePtr == NULL ) {
+        return NULL;
+    }
+    else {
+        return nodePtr->skeleton;
+    }
+}
+
+UBool
+PatternMapIterator::hasNext() {
+    int32_t headIndex=bootIndex;
+    PtnElem *curPtr=nodePtr;
+
+    if (patternMap==NULL) {
+        return FALSE;
+    }
+    while ( headIndex < MAX_PATTERN_ENTRIES ) {
+        if ( curPtr != NULL ) {
+            if ( curPtr->next != NULL ) {
+                return TRUE;
+            }
+            else {
+                headIndex++;
+                curPtr=NULL;
+                continue;
+            }
+        }
+        else {
+            if ( patternMap->boot[headIndex] != NULL ) {
+                return TRUE;
+            }
+            else {
+                headIndex++;
+                continue;
+            }
+        }
+
+    }
+    return FALSE;
+}
+
+DateTimeMatcher&
+PatternMapIterator::next() {
+    while ( bootIndex < MAX_PATTERN_ENTRIES ) {
+        if ( nodePtr != NULL ) {
+            if ( nodePtr->next != NULL ) {
+                nodePtr = nodePtr->next;
+                break;
+            }
+            else {
+                bootIndex++;
+                nodePtr=NULL;
+                continue;
+            }
+        }
+        else {
+            if ( patternMap->boot[bootIndex] != NULL ) {
+                nodePtr = patternMap->boot[bootIndex];
+                break;
+            }
+            else {
+                bootIndex++;
+                continue;
+            }
+        }
+    }
+    if (nodePtr!=NULL) {
+        matcher->copyFrom(*nodePtr->skeleton);
+    }
+    else {
+        matcher->copyFrom();
+    }
+    return *matcher;
+}
+
+PtnSkeleton::PtnSkeleton() {
+}
+
+
+PtnSkeleton::PtnSkeleton(const PtnSkeleton& other) {
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        this->type[i]=other.type[i];
+        this->original[i]=other.original[i];
+        this->baseOriginal[i]=other.baseOriginal[i];
+    }
+}
+
+UBool
+PtnSkeleton::equals(const PtnSkeleton& other)  {
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        if ( (type[i]!= other.type[i]) ||
+             (original[i]!=other.original[i]) ||
+             (baseOriginal[i]!=other.baseOriginal[i]) ) {
+            return FALSE;
+        }
+    }
+    return TRUE;
+}
+
+UnicodeString
+PtnSkeleton::getSkeleton() {
+    UnicodeString result;
+
+    for(int32_t i=0; i< UDATPG_FIELD_COUNT; ++i) {
+        if (original[i].length()!=0) {
+            result += original[i];
+        }
+    }
+    return result;
+}
+
+UnicodeString
+PtnSkeleton::getBaseSkeleton() {
+    UnicodeString result;
+
+    for(int32_t i=0; i< UDATPG_FIELD_COUNT; ++i) {
+        if (baseOriginal[i].length()!=0) {
+            result += baseOriginal[i];
+        }
+    }
+    return result;
+}
+
+PtnSkeleton::~PtnSkeleton() {
+}
+
+PtnElem::PtnElem(const UnicodeString &basePat, const UnicodeString &pat) :
+basePattern(basePat),
+skeleton(NULL),
+pattern(pat),
+next(NULL)
+{
+}
+
+PtnElem::~PtnElem() {
+
+    if (next!=NULL) {
+        delete next;
+    }
+    delete skeleton;
+}
+
+DTSkeletonEnumeration::DTSkeletonEnumeration(PatternMap &patternMap, dtStrEnum type, UErrorCode& status) {
+    PtnElem  *curElem;
+    PtnSkeleton *curSkeleton;
+    UnicodeString s;
+    int32_t bootIndex;
+
+    pos=0;
+    fSkeletons = new UVector(status);
+    if (U_FAILURE(status)) {
+        delete fSkeletons;
+        return;
+    }
+    for (bootIndex=0; bootIndex<MAX_PATTERN_ENTRIES; ++bootIndex ) {
+        curElem = patternMap.boot[bootIndex];
+        while (curElem!=NULL) {
+            switch(type) {
+                case DT_BASESKELETON:
+                    s=curElem->basePattern;
+                    break;
+                case DT_PATTERN:
+                    s=curElem->pattern;
+                    break;
+                case DT_SKELETON:
+                    curSkeleton=curElem->skeleton;
+                    s=curSkeleton->getSkeleton();
+                    break;
+            }
+            if ( !isCanonicalItem(s) ) {
+                fSkeletons->addElement(new UnicodeString(s), status);
+                if (U_FAILURE(status)) {
+                    delete fSkeletons;
+                    fSkeletons = NULL;
+                    return;
+                }
+            }
+            curElem = curElem->next;
+        }
+    }
+    if ((bootIndex==MAX_PATTERN_ENTRIES) && (curElem!=NULL) ) {
+        status = U_BUFFER_OVERFLOW_ERROR;
+    }
+}
+
+const UnicodeString*
+DTSkeletonEnumeration::snext(UErrorCode& status) {
+    if (U_SUCCESS(status) && pos < fSkeletons->size()) {
+        return (const UnicodeString*)fSkeletons->elementAt(pos++);
+    }
+    return NULL;
+}
+
+void
+DTSkeletonEnumeration::reset(UErrorCode& /*status*/) {
+    pos=0;
+}
+
+int32_t
+DTSkeletonEnumeration::count(UErrorCode& /*status*/) const {
+   return (fSkeletons==NULL) ? 0 : fSkeletons->size();
+}
+
+UBool
+DTSkeletonEnumeration::isCanonicalItem(const UnicodeString& item) {
+    if ( item.length() != 1 ) {
+        return FALSE;
+    }
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        if (item.charAt(0)==Canonical_Items[i]) {
+            return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+DTSkeletonEnumeration::~DTSkeletonEnumeration() {
+    UnicodeString *s;
+    for (int32_t i=0; i<fSkeletons->size(); ++i) {
+        if ((s=(UnicodeString *)fSkeletons->elementAt(i))!=NULL) {
+            delete s;
+        }
+    }
+    delete fSkeletons;
+}
+
+DTRedundantEnumeration::DTRedundantEnumeration() {
+    pos=0;
+    fPatterns = NULL;
+}
+
+void
+DTRedundantEnumeration::add(const UnicodeString& pattern, UErrorCode& status) {
+    if (U_FAILURE(status)) return;
+    if (fPatterns == NULL)  {
+        fPatterns = new UVector(status);
+        if (U_FAILURE(status)) {
+            delete fPatterns;
+            fPatterns = NULL;
+            return;
+       }
+    }
+    fPatterns->addElement(new UnicodeString(pattern), status);
+    if (U_FAILURE(status)) {
+        delete fPatterns;
+        fPatterns = NULL;
+        return;
+    }
+}
+
+const UnicodeString*
+DTRedundantEnumeration::snext(UErrorCode& status) {
+    if (U_SUCCESS(status) && pos < fPatterns->size()) {
+        return (const UnicodeString*)fPatterns->elementAt(pos++);
+    }
+    return NULL;
+}
+
+void
+DTRedundantEnumeration::reset(UErrorCode& /*status*/) {
+    pos=0;
+}
+
+int32_t
+DTRedundantEnumeration::count(UErrorCode& /*status*/) const {
+       return (fPatterns==NULL) ? 0 : fPatterns->size();
+}
+
+UBool
+DTRedundantEnumeration::isCanonicalItem(const UnicodeString& item) {
+    if ( item.length() != 1 ) {
+        return FALSE;
+    }
+    for (int32_t i=0; i<UDATPG_FIELD_COUNT; ++i) {
+        if (item.charAt(0)==Canonical_Items[i]) {
+            return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+DTRedundantEnumeration::~DTRedundantEnumeration() {
+    UnicodeString *s;
+    for (int32_t i=0; i<fPatterns->size(); ++i) {
+        if ((s=(UnicodeString *)fPatterns->elementAt(i))!=NULL) {
+            delete s;
+        }
+    }
+    delete fPatterns;
+}
+
+U_NAMESPACE_END
+
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+//eof