Check in the pristine copy of ICU 4.6...

icu46/source/i18n/dtitvinf.cpp

+/*******************************************************************************
+* Copyright (C) 2008-2010, International Business Machines Corporation and
+* others. All Rights Reserved.
+*******************************************************************************
+*
+* File DTITVINF.CPP 
+*
+*******************************************************************************
+*/
+
+#include "unicode/dtitvinf.h"
+
+
+#if !UCONFIG_NO_FORMATTING
+
+//TODO: define it in compiler time
+//#define DTITVINF_DEBUG 1
+
+
+#ifdef DTITVINF_DEBUG 
+#include <iostream>
+#endif
+
+#include "cstring.h"
+#include "unicode/msgfmt.h"
+#include "unicode/uloc.h"
+#include "unicode/ures.h"
+#include "dtitv_impl.h"
+#include "hash.h"
+#include "gregoimp.h"
+#include "uresimp.h"
+#include "hash.h"
+#include "gregoimp.h"
+#include "uresimp.h"
+
+
+U_NAMESPACE_BEGIN
+
+
+#ifdef DTITVINF_DEBUG 
+#define PRINTMESG(msg) { std::cout << "(" << __FILE__ << ":" << __LINE__ << ") " << msg << "\n"; }
+#endif
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(DateIntervalInfo)
+
+static const char gCalendarTag[]="calendar";
+static const char gGregorianTag[]="gregorian";
+static const char gIntervalDateTimePatternTag[]="intervalFormats";
+static const char gFallbackPatternTag[]="fallback";
+
+// {0}
+static const UChar gFirstPattern[] = {LEFT_CURLY_BRACKET, DIGIT_ZERO, RIGHT_CURLY_BRACKET};
+// {1}
+static const UChar gSecondPattern[] = {LEFT_CURLY_BRACKET, DIGIT_ONE, RIGHT_CURLY_BRACKET};
+
+// default fall-back
+static const UChar gDefaultFallbackPattern[] = {LEFT_CURLY_BRACKET, DIGIT_ZERO, RIGHT_CURLY_BRACKET, SPACE, EN_DASH, SPACE, LEFT_CURLY_BRACKET, DIGIT_ONE, RIGHT_CURLY_BRACKET, 0};
+
+
+
+DateIntervalInfo::DateIntervalInfo(UErrorCode& status) 
+:   fFallbackIntervalPattern(gDefaultFallbackPattern),
+    fFirstDateInPtnIsLaterDate(false),
+    fIntervalPatterns(NULL)
+{
+    fIntervalPatterns = initHash(status);
+}
+
+
+
+DateIntervalInfo::DateIntervalInfo(const Locale& locale, UErrorCode& status)
+:   fFallbackIntervalPattern(gDefaultFallbackPattern),
+    fFirstDateInPtnIsLaterDate(false),
+    fIntervalPatterns(NULL)
+{
+    initializeData(locale, status);
+}
+
+
+
+void
+DateIntervalInfo::setIntervalPattern(const UnicodeString& skeleton,
+                                     UCalendarDateFields lrgDiffCalUnit,
+                                     const UnicodeString& intervalPattern,
+                                     UErrorCode& status) {
+    
+    if ( lrgDiffCalUnit == UCAL_HOUR_OF_DAY ) {
+        setIntervalPatternInternally(skeleton, UCAL_AM_PM, intervalPattern, status);
+        setIntervalPatternInternally(skeleton, UCAL_HOUR, intervalPattern, status);
+    } else if ( lrgDiffCalUnit == UCAL_DAY_OF_MONTH ||
+                lrgDiffCalUnit == UCAL_DAY_OF_WEEK ) {
+        setIntervalPatternInternally(skeleton, UCAL_DATE, intervalPattern, status);
+    } else {
+        setIntervalPatternInternally(skeleton, lrgDiffCalUnit, intervalPattern, status);
+    }
+}
+
+
+void
+DateIntervalInfo::setFallbackIntervalPattern(
+                                    const UnicodeString& fallbackPattern,
+                                    UErrorCode& status) {
+    if ( U_FAILURE(status) ) {
+        return;
+    }
+    int32_t firstPatternIndex = fallbackPattern.indexOf(gFirstPattern, 
+                        sizeof(gFirstPattern)/sizeof(gFirstPattern[0]), 0);
+    int32_t secondPatternIndex = fallbackPattern.indexOf(gSecondPattern, 
+                        sizeof(gSecondPattern)/sizeof(gSecondPattern[0]), 0);
+    if ( firstPatternIndex == -1 || secondPatternIndex == -1 ) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return;
+    }
+    if ( firstPatternIndex > secondPatternIndex ) { 
+        fFirstDateInPtnIsLaterDate = true;
+    }
+    fFallbackIntervalPattern = fallbackPattern;
+}
+
+
+
+DateIntervalInfo::DateIntervalInfo(const DateIntervalInfo& dtitvinf)
+:   UObject(dtitvinf),
+    fIntervalPatterns(NULL)
+{
+    *this = dtitvinf;
+}
+    
+
+
+DateIntervalInfo&
+DateIntervalInfo::operator=(const DateIntervalInfo& dtitvinf) {
+    if ( this == &dtitvinf ) {
+        return *this;
+    }
+    
+    UErrorCode status = U_ZERO_ERROR;
+    deleteHash(fIntervalPatterns);
+    fIntervalPatterns = initHash(status);
+    copyHash(dtitvinf.fIntervalPatterns, fIntervalPatterns, status);
+    if ( U_FAILURE(status) ) {
+        return *this;
+    } 
+
+    fFallbackIntervalPattern = dtitvinf.fFallbackIntervalPattern;
+    fFirstDateInPtnIsLaterDate = dtitvinf.fFirstDateInPtnIsLaterDate;
+    return *this;
+}
+
+
+DateIntervalInfo*
+DateIntervalInfo::clone() const {
+    return new DateIntervalInfo(*this);
+}
+
+
+DateIntervalInfo::~DateIntervalInfo() {
+    deleteHash(fIntervalPatterns);
+    fIntervalPatterns = NULL;
+}
+
+
+UBool
+DateIntervalInfo::operator==(const DateIntervalInfo& other) const {
+    UBool equal = ( 
+      fFallbackIntervalPattern == other.fFallbackIntervalPattern &&
+      fFirstDateInPtnIsLaterDate == other.fFirstDateInPtnIsLaterDate );
+
+    if ( equal == TRUE ) {
+        equal = fIntervalPatterns->equals(*(other.fIntervalPatterns));
+    }
+
+    return equal;
+}
+
+
+UnicodeString&
+DateIntervalInfo::getIntervalPattern(const UnicodeString& skeleton,
+                                     UCalendarDateFields field,
+                                     UnicodeString& result,
+                                     UErrorCode& status) const {
+    if ( U_FAILURE(status) ) {
+        return result;
+    }
+   
+    const UnicodeString* patternsOfOneSkeleton = (UnicodeString*) fIntervalPatterns->get(skeleton);
+    if ( patternsOfOneSkeleton != NULL ) {
+        IntervalPatternIndex index = calendarFieldToIntervalIndex(field, status);
+        if ( U_FAILURE(status) ) {
+            return result;
+        }
+        const UnicodeString& intervalPattern =  patternsOfOneSkeleton[index];
+        if ( !intervalPattern.isEmpty() ) {
+            result = intervalPattern;
+        }
+    }
+    return result;
+}
+
+
+UBool
+DateIntervalInfo::getDefaultOrder() const {
+    return fFirstDateInPtnIsLaterDate;
+}
+
+
+UnicodeString&
+DateIntervalInfo::getFallbackIntervalPattern(UnicodeString& result) const {
+    result = fFallbackIntervalPattern;
+    return result;
+}
+
+#define ULOC_LOCALE_IDENTIFIER_CAPACITY (ULOC_FULLNAME_CAPACITY + 1 + ULOC_KEYWORD_AND_VALUES_CAPACITY)
+
+void 
+DateIntervalInfo::initializeData(const Locale& locale, UErrorCode& err)
+{
+  fIntervalPatterns = initHash(err);
+  if ( U_FAILURE(err) ) {
+      return;
+  }
+  const char *locName = locale.getName();
+  char parentLocale[ULOC_FULLNAME_CAPACITY];
+  int32_t locNameLen;
+  uprv_strcpy(parentLocale, locName);
+  UErrorCode status = U_ZERO_ERROR;
+  Hashtable skeletonSet(FALSE, status);
+  if ( U_FAILURE(status) ) {
+      return;
+  }
+
+  // determine calendar type
+  const char * calendarTypeToUse = gGregorianTag; // initial default
+  char         calendarType[ULOC_KEYWORDS_CAPACITY]; // to be filled in with the type to use, if all goes well
+  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", locName, NULL, FALSE, &status);
+  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, &status);
+  if (U_SUCCESS(status) && calendarTypeLen < ULOC_KEYWORDS_CAPACITY) {
+    calendarTypeToUse = calendarType;
+  }
+  status = U_ZERO_ERROR;
+  
+  do {
+    UResourceBundle *rb, *calBundle, *calTypeBundle, *itvDtPtnResource;
+    rb = ures_open(NULL, parentLocale, &status);
+    calBundle = ures_getByKey(rb, gCalendarTag, NULL, &status); 
+    calTypeBundle = ures_getByKey(calBundle, calendarTypeToUse, NULL, &status);
+    itvDtPtnResource = ures_getByKeyWithFallback(calTypeBundle, 
+                         gIntervalDateTimePatternTag, NULL, &status);
+
+    if ( U_SUCCESS(status) ) {
+        // look for fallback first, since it establishes the default order
+        const UChar* resStr;
+        int32_t resStrLen = 0;
+        resStr = ures_getStringByKeyWithFallback(itvDtPtnResource, 
+                                             gFallbackPatternTag, 
+                                             &resStrLen, &status);
+        if ( U_SUCCESS(status) ) {
+            UnicodeString pattern = UnicodeString(TRUE, resStr, resStrLen);
+            setFallbackIntervalPattern(pattern, status);
+        }
+
+        int32_t size = ures_getSize(itvDtPtnResource);
+        int32_t index;
+        for ( index = 0; index < size; ++index ) {
+            UResourceBundle* oneRes = ures_getByIndex(itvDtPtnResource, index, 
+                                                     NULL, &status);
+            if ( U_SUCCESS(status) ) {
+                const char* skeleton = ures_getKey(oneRes);
+                if ( skeleton == NULL || 
+                     skeletonSet.geti(UnicodeString(skeleton)) == 1 ) {
+                    ures_close(oneRes);
+                    continue;
+                }
+                skeletonSet.puti(UnicodeString(skeleton), 1, status);
+                if ( uprv_strcmp(skeleton, gFallbackPatternTag) == 0 ) {
+                    ures_close(oneRes);
+                    continue;  // fallback
+                }
+    
+                UResourceBundle* intervalPatterns = ures_getByKey(
+                                     itvDtPtnResource, skeleton, NULL, &status);
+    
+                if ( U_FAILURE(status) ) {
+                    ures_close(intervalPatterns);
+                    ures_close(oneRes);
+                    break;
+                }
+                if ( intervalPatterns == NULL ) {
+                    ures_close(intervalPatterns);
+                    ures_close(oneRes);
+                    continue;
+                }
+    
+                const UChar* pattern;
+                const char* key;
+                int32_t ptLength;
+                int32_t ptnNum = ures_getSize(intervalPatterns);
+                int32_t ptnIndex;
+                for ( ptnIndex = 0; ptnIndex < ptnNum; ++ptnIndex ) {
+                    pattern = ures_getNextString(intervalPatterns, &ptLength, &key,
+                                                 &status);
+                    if ( U_FAILURE(status) ) {
+                        break;
+                    }
+        
+                    UCalendarDateFields calendarField = UCAL_FIELD_COUNT;
+                    if ( !uprv_strcmp(key, "y") ) {
+                        calendarField = UCAL_YEAR;
+                    } else if ( !uprv_strcmp(key, "M") ) {
+                        calendarField = UCAL_MONTH;
+                    } else if ( !uprv_strcmp(key, "d") ) {
+                        calendarField = UCAL_DATE;
+                    } else if ( !uprv_strcmp(key, "a") ) {
+                        calendarField = UCAL_AM_PM;
+                    } else if ( !uprv_strcmp(key, "h") || !uprv_strcmp(key, "H") ) {
+                        calendarField = UCAL_HOUR;
+                    } else if ( !uprv_strcmp(key, "m") ) {
+                        calendarField = UCAL_MINUTE;
+                    }
+                    if ( calendarField != UCAL_FIELD_COUNT ) {
+                        setIntervalPatternInternally(skeleton, calendarField, pattern,status);
+                    }
+                }
+                ures_close(intervalPatterns);
+            }
+            ures_close(oneRes);
+        }
+    }
+    ures_close(itvDtPtnResource);
+    ures_close(calTypeBundle);
+    ures_close(calBundle);
+    ures_close(rb);
+    status = U_ZERO_ERROR;
+    locNameLen = uloc_getParent(parentLocale, parentLocale,
+                                ULOC_FULLNAME_CAPACITY,&status);
+  } while ( locNameLen > 0 );
+}
+
+
+
+void
+DateIntervalInfo::setIntervalPatternInternally(const UnicodeString& skeleton,
+                                      UCalendarDateFields lrgDiffCalUnit,
+                                      const UnicodeString& intervalPattern,
+                                      UErrorCode& status) {
+    IntervalPatternIndex index = calendarFieldToIntervalIndex(lrgDiffCalUnit,status);
+    if ( U_FAILURE(status) ) {
+        return;
+    }
+    UnicodeString* patternsOfOneSkeleton = (UnicodeString*)(fIntervalPatterns->get(skeleton));
+    UBool emptyHash = false;
+    if ( patternsOfOneSkeleton == NULL ) {
+        patternsOfOneSkeleton = new UnicodeString[kIPI_MAX_INDEX];
+        emptyHash = true;
+    }
+    
+    patternsOfOneSkeleton[index] = intervalPattern;
+    if ( emptyHash == TRUE ) {
+        fIntervalPatterns->put(skeleton, patternsOfOneSkeleton, status);
+    }
+}
+
+
+
+void 
+DateIntervalInfo::parseSkeleton(const UnicodeString& skeleton, 
+                                int32_t* skeletonFieldWidth) {
+    const int8_t PATTERN_CHAR_BASE = 0x41;
+    int32_t i;
+    for ( i = 0; i < skeleton.length(); ++i ) {
+        // it is an ASCII char in skeleton
+        int8_t ch = (int8_t)skeleton.charAt(i);  
+        ++skeletonFieldWidth[ch - PATTERN_CHAR_BASE];
+    }
+}
+
+
+
+UBool 
+DateIntervalInfo::stringNumeric(int32_t fieldWidth, int32_t anotherFieldWidth,
+                                char patternLetter) {
+    if ( patternLetter == 'M' ) {
+        if ( (fieldWidth <= 2 && anotherFieldWidth > 2) ||
+             (fieldWidth > 2 && anotherFieldWidth <= 2 )) {
+            return true;
+        }
+    }
+    return false;
+}
+
+
+
+const UnicodeString* 
+DateIntervalInfo::getBestSkeleton(const UnicodeString& skeleton,
+                                  int8_t& bestMatchDistanceInfo) const {
+#ifdef DTITVINF_DEBUG
+    char result[1000];
+    char result_1[1000];
+    char mesg[2000];
+    skeleton.extract(0,  skeleton.length(), result, "UTF-8");
+    sprintf(mesg, "in getBestSkeleton: skeleton: %s; \n", result);
+    PRINTMESG(mesg)
+#endif
+
+
+    int32_t inputSkeletonFieldWidth[] =
+    {
+    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
+             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    //   P   Q   R   S   T   U   V   W   X   Y   Z
+         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
+    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
+         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    //   p   q   r   s   t   u   v   w   x   y   z
+         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+    };
+
+    int32_t skeletonFieldWidth[] =
+    {
+    //       A   B   C   D   E   F   G   H   I   J   K   L   M   N   O
+             0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    //   P   Q   R   S   T   U   V   W   X   Y   Z
+         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0,  0, 0, 0,
+    //       a   b   c   d   e   f   g   h   i   j   k   l   m   n   o
+         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+    //   p   q   r   s   t   u   v   w   x   y   z
+         0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+    };
+
+    const int32_t DIFFERENT_FIELD = 0x1000;
+    const int32_t STRING_NUMERIC_DIFFERENCE = 0x100;
+    const int32_t BASE = 0x41;
+    const UChar CHAR_V = 0x0076;
+    const UChar CHAR_Z = 0x007A;
+
+    // hack for 'v' and 'z'.
+    // resource bundle only have time skeletons ending with 'v',
+    // but not for time skeletons ending with 'z'.
+    UBool replaceZWithV = false;
+    const UnicodeString* inputSkeleton = &skeleton; 
+    UnicodeString copySkeleton;
+    if ( skeleton.indexOf(CHAR_Z) != -1 ) {
+        UChar zstr[2];
+        UChar vstr[2]; 
+        zstr[0]=CHAR_Z;
+        vstr[0]=CHAR_V;
+        zstr[1]=0;
+        vstr[1]=0;
+        copySkeleton = skeleton;
+        copySkeleton.findAndReplace(zstr, vstr);
+        inputSkeleton = &copySkeleton;
+        replaceZWithV = true;
+    }
+
+    parseSkeleton(*inputSkeleton, inputSkeletonFieldWidth);
+    int32_t bestDistance = MAX_POSITIVE_INT;
+    const UnicodeString* bestSkeleton = NULL;
+
+    // 0 means exact the same skeletons;
+    // 1 means having the same field, but with different length,
+    // 2 means only z/v differs
+    // -1 means having different field.
+    bestMatchDistanceInfo = 0;
+    int8_t fieldLength = sizeof(skeletonFieldWidth)/sizeof(skeletonFieldWidth[0]);
+
+    int32_t pos = -1;
+    const UHashElement* elem = NULL;
+    while ( (elem = fIntervalPatterns->nextElement(pos)) != NULL ) {
+        const UHashTok keyTok = elem->key;
+        UnicodeString* skeleton = (UnicodeString*)keyTok.pointer;
+#ifdef DTITVINF_DEBUG
+    skeleton->extract(0,  skeleton->length(), result, "UTF-8");
+    sprintf(mesg, "available skeletons: skeleton: %s; \n", result);
+    PRINTMESG(mesg)
+#endif
+
+        // clear skeleton field width
+        int8_t i;
+        for ( i = 0; i < fieldLength; ++i ) {
+            skeletonFieldWidth[i] = 0;    
+        }
+        parseSkeleton(*skeleton, skeletonFieldWidth);
+        // calculate distance
+        int32_t distance = 0;
+        int8_t fieldDifference = 1;
+        for ( i = 0; i < fieldLength; ++i ) {
+            int32_t inputFieldWidth = inputSkeletonFieldWidth[i];
+            int32_t fieldWidth = skeletonFieldWidth[i];
+            if ( inputFieldWidth == fieldWidth ) {
+                continue;
+            }
+            if ( inputFieldWidth == 0 ) {
+                fieldDifference = -1;
+                distance += DIFFERENT_FIELD;
+            } else if ( fieldWidth == 0 ) {
+                fieldDifference = -1;
+                distance += DIFFERENT_FIELD;
+            } else if (stringNumeric(inputFieldWidth, fieldWidth, 
+                                     (char)(i+BASE) ) ) {
+                distance += STRING_NUMERIC_DIFFERENCE;
+            } else {
+                distance += (inputFieldWidth > fieldWidth) ? 
+                            (inputFieldWidth - fieldWidth) : 
+                            (fieldWidth - inputFieldWidth);
+            }
+        }
+        if ( distance < bestDistance ) {
+            bestSkeleton = skeleton;
+            bestDistance = distance;
+            bestMatchDistanceInfo = fieldDifference;
+        }
+        if ( distance == 0 ) {
+            bestMatchDistanceInfo = 0;
+            break;
+        }
+    }
+    if ( replaceZWithV && bestMatchDistanceInfo != -1 ) {
+        bestMatchDistanceInfo = 2;
+    }
+    return bestSkeleton;
+}
+
+
+
+DateIntervalInfo::IntervalPatternIndex
+DateIntervalInfo::calendarFieldToIntervalIndex(UCalendarDateFields field, 
+                                               UErrorCode& status) {
+    if ( U_FAILURE(status) ) {
+        return kIPI_MAX_INDEX;
+    }
+    IntervalPatternIndex index = kIPI_MAX_INDEX;
+    switch ( field ) {
+      case UCAL_ERA:
+        index = kIPI_ERA;
+        break;
+      case UCAL_YEAR:
+        index = kIPI_YEAR;
+        break;
+      case UCAL_MONTH:
+        index = kIPI_MONTH;
+        break;
+      case UCAL_DATE:
+      case UCAL_DAY_OF_WEEK:
+      //case UCAL_DAY_OF_MONTH:
+        index = kIPI_DATE;
+        break;
+      case UCAL_AM_PM:
+        index = kIPI_AM_PM;
+        break;
+      case UCAL_HOUR:
+      case UCAL_HOUR_OF_DAY:
+        index = kIPI_HOUR;
+        break;
+      case UCAL_MINUTE:
+        index = kIPI_MINUTE;
+        break;
+      default:
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+    }
+    return index;
+}
+
+
+
+void
+DateIntervalInfo::deleteHash(Hashtable* hTable) 
+{
+    if ( hTable == NULL ) {
+        return;
+    }
+    int32_t pos = -1;
+    const UHashElement* element = NULL;
+    while ( (element = hTable->nextElement(pos)) != NULL ) {
+        const UHashTok keyTok = element->key;
+        const UHashTok valueTok = element->value;
+        const UnicodeString* value = (UnicodeString*)valueTok.pointer;
+        delete[] value;
+    }
+    delete fIntervalPatterns;
+}
+
+
+U_CDECL_BEGIN 
+
+/**
+ * set hash table value comparator
+ *
+ * @param val1  one value in comparison
+ * @param val2  the other value in comparison
+ * @return      TRUE if 2 values are the same, FALSE otherwise
+ */
+static UBool U_CALLCONV dtitvinfHashTableValueComparator(UHashTok val1, UHashTok val2);
+
+static UBool 
+U_CALLCONV dtitvinfHashTableValueComparator(UHashTok val1, UHashTok val2) {
+    const UnicodeString* pattern1 = (UnicodeString*)val1.pointer;
+    const UnicodeString* pattern2 = (UnicodeString*)val2.pointer;
+    UBool ret = TRUE;
+    int8_t i;
+    for ( i = 0; i < DateIntervalInfo::kMaxIntervalPatternIndex && ret == TRUE; ++i ) {
+        ret = (pattern1[i] == pattern2[i]);
+    }
+    return ret;
+}
+
+U_CDECL_END
+
+
+Hashtable*
+DateIntervalInfo::initHash(UErrorCode& status) {
+    if ( U_FAILURE(status) ) {
+        return NULL;
+    }
+    Hashtable* hTable;
+    if ( (hTable = new Hashtable(FALSE, status)) == NULL ) {
+        status = U_MEMORY_ALLOCATION_ERROR;
+        return NULL;
+    }
+    hTable->setValueComparator(dtitvinfHashTableValueComparator);
+    return hTable;
+}
+
+
+void
+DateIntervalInfo::copyHash(const Hashtable* source,
+                           Hashtable* target,
+                           UErrorCode& status) {
+    if ( U_FAILURE(status) ) {
+        return;
+    }
+    int32_t pos = -1;
+    const UHashElement* element = NULL;
+    if ( source ) {
+        while ( (element = source->nextElement(pos)) != NULL ) {
+            const UHashTok keyTok = element->key;
+            const UnicodeString* key = (UnicodeString*)keyTok.pointer;
+            const UHashTok valueTok = element->value;
+            const UnicodeString* value = (UnicodeString*)valueTok.pointer;
+            UnicodeString* copy = new UnicodeString[kIPI_MAX_INDEX];
+            int8_t i;
+            for ( i = 0; i < kIPI_MAX_INDEX; ++i ) {
+                copy[i] = value[i];
+            }
+            target->put(UnicodeString(*key), copy, status);
+            if ( U_FAILURE(status) ) {
+                return;
+            }
+        }
+    }
+}
+
+
+U_NAMESPACE_END
+
+#endif