import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

intl/icu/source/i18n/datefmt.cpp

@@ -0,0 +1,748 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+ *******************************************************************************
+ * Copyright (C) 1997-2015, International Business Machines Corporation and    *
+ * others. All Rights Reserved.                                                *
+ *******************************************************************************
+ *
+ * File DATEFMT.CPP
+ *
+ * Modification History:
+ *
+ *   Date        Name        Description
+ *   02/19/97    aliu        Converted from java.
+ *   03/31/97    aliu        Modified extensively to work with 50 locales.
+ *   04/01/97    aliu        Added support for centuries.
+ *   08/12/97    aliu        Fixed operator== to use Calendar::equivalentTo.
+ *   07/20/98    stephen     Changed ParsePosition initialization
+ ********************************************************************************
+ */
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "unicode/ures.h"
+#include "unicode/datefmt.h"
+#include "unicode/smpdtfmt.h"
+#include "unicode/dtptngen.h"
+#include "unicode/udisplaycontext.h"
+#include "reldtfmt.h"
+#include "sharedobject.h"
+#include "unifiedcache.h"
+#include "uarrsort.h"
+
+#include "cstring.h"
+#include "windtfmt.h"
+
+#if defined( U_DEBUG_CALSVC ) || defined (U_DEBUG_CAL)
+#include <stdio.h>
+#endif
+
+// *****************************************************************************
+// class DateFormat
+// *****************************************************************************
+
+U_NAMESPACE_BEGIN
+
+class U_I18N_API DateFmtBestPattern : public SharedObject {
+public:
+    UnicodeString fPattern;
+
+    DateFmtBestPattern(const UnicodeString &pattern)
+            : fPattern(pattern) { }
+    ~DateFmtBestPattern();
+};
+
+DateFmtBestPattern::~DateFmtBestPattern() {
+}
+
+template<> U_I18N_API
+const DateFmtBestPattern *LocaleCacheKey<DateFmtBestPattern>::createObject(
+        const void * /*creationContext*/, UErrorCode &status) const {
+    status = U_UNSUPPORTED_ERROR;
+    return NULL;
+}
+
+class U_I18N_API DateFmtBestPatternKey : public LocaleCacheKey<DateFmtBestPattern> { 
+private:
+    UnicodeString fSkeleton;
+public:
+    DateFmtBestPatternKey(
+        const Locale &loc,
+        const UnicodeString &skeleton,
+        UErrorCode &status)
+            : LocaleCacheKey<DateFmtBestPattern>(loc),
+              fSkeleton(DateTimePatternGenerator::staticGetSkeleton(skeleton, status)) { }
+    DateFmtBestPatternKey(const DateFmtBestPatternKey &other) :
+            LocaleCacheKey<DateFmtBestPattern>(other),
+            fSkeleton(other.fSkeleton) { }
+    virtual ~DateFmtBestPatternKey();
+    virtual int32_t hashCode() const {
+        return 37 * LocaleCacheKey<DateFmtBestPattern>::hashCode() + fSkeleton.hashCode();
+    }
+    virtual UBool operator==(const CacheKeyBase &other) const {
+       // reflexive
+       if (this == &other) { 	
+           return TRUE;
+       }
+       if (!LocaleCacheKey<DateFmtBestPattern>::operator==(other)) {
+           return FALSE;
+       }
+       // We know that this and other are of same class if we get this far.
+       const DateFmtBestPatternKey &realOther =
+               static_cast<const DateFmtBestPatternKey &>(other);
+       return (realOther.fSkeleton == fSkeleton);
+    }
+    virtual CacheKeyBase *clone() const {
+        return new DateFmtBestPatternKey(*this);
+    }
+    virtual const DateFmtBestPattern *createObject(
+            const void * /*unused*/, UErrorCode &status) const {
+        LocalPointer<DateTimePatternGenerator> dtpg(
+                    DateTimePatternGenerator::createInstance(fLoc, status));
+        if (U_FAILURE(status)) {
+            return NULL;
+        }
+  
+        LocalPointer<DateFmtBestPattern> pattern(
+                new DateFmtBestPattern(
+                        dtpg->getBestPattern(fSkeleton, status)),
+                status);
+        if (U_FAILURE(status)) {
+            return NULL;
+        }
+        DateFmtBestPattern *result = pattern.orphan();
+        result->addRef();
+        return result;
+    }
+};
+
+DateFmtBestPatternKey::~DateFmtBestPatternKey() { }
+
+
+DateFormat::DateFormat()
+:   fCalendar(0),
+    fNumberFormat(0),
+    fCapitalizationContext(UDISPCTX_CAPITALIZATION_NONE)
+{
+}
+
+//----------------------------------------------------------------------
+
+DateFormat::DateFormat(const DateFormat& other)
+:   Format(other),
+    fCalendar(0),
+    fNumberFormat(0),
+    fCapitalizationContext(UDISPCTX_CAPITALIZATION_NONE)
+{
+    *this = other;
+}
+
+//----------------------------------------------------------------------
+
+DateFormat& DateFormat::operator=(const DateFormat& other)
+{
+    if (this != &other)
+    {
+        delete fCalendar;
+        delete fNumberFormat;
+        if(other.fCalendar) {
+          fCalendar = other.fCalendar->clone();
+        } else {
+          fCalendar = NULL;
+        }
+        if(other.fNumberFormat) {
+          fNumberFormat = (NumberFormat*)other.fNumberFormat->clone();
+        } else {
+          fNumberFormat = NULL;
+        }
+        fBoolFlags = other.fBoolFlags;
+        fCapitalizationContext = other.fCapitalizationContext;
+    }
+    return *this;
+}
+
+//----------------------------------------------------------------------
+
+DateFormat::~DateFormat()
+{
+    delete fCalendar;
+    delete fNumberFormat;
+}
+
+//----------------------------------------------------------------------
+
+UBool
+DateFormat::operator==(const Format& other) const
+{
+    // This protected comparison operator should only be called by subclasses
+    // which have confirmed that the other object being compared against is
+    // an instance of a sublcass of DateFormat.  THIS IS IMPORTANT.
+
+    // Format::operator== guarantees that this cast is safe
+    DateFormat* fmt = (DateFormat*)&other;
+
+    return (this == fmt) ||
+        (Format::operator==(other) &&
+         fCalendar&&(fCalendar->isEquivalentTo(*fmt->fCalendar)) &&
+         (fNumberFormat && *fNumberFormat == *fmt->fNumberFormat) &&
+         (fCapitalizationContext == fmt->fCapitalizationContext) );
+}
+
+//----------------------------------------------------------------------
+
+UnicodeString&
+DateFormat::format(const Formattable& obj,
+                   UnicodeString& appendTo,
+                   FieldPosition& fieldPosition,
+                   UErrorCode& status) const
+{
+    if (U_FAILURE(status)) return appendTo;
+
+    // if the type of the Formattable is double or long, treat it as if it were a Date
+    UDate date = 0;
+    switch (obj.getType())
+    {
+    case Formattable::kDate:
+        date = obj.getDate();
+        break;
+    case Formattable::kDouble:
+        date = (UDate)obj.getDouble();
+        break;
+    case Formattable::kLong:
+        date = (UDate)obj.getLong();
+        break;
+    default:
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return appendTo;
+    }
+
+    // Is this right?
+    //if (fieldPosition.getBeginIndex() == fieldPosition.getEndIndex())
+    //  status = U_ILLEGAL_ARGUMENT_ERROR;
+
+    return format(date, appendTo, fieldPosition);
+}
+
+//----------------------------------------------------------------------
+
+UnicodeString&
+DateFormat::format(const Formattable& obj,
+                   UnicodeString& appendTo,
+                   FieldPositionIterator* posIter,
+                   UErrorCode& status) const
+{
+    if (U_FAILURE(status)) return appendTo;
+
+    // if the type of the Formattable is double or long, treat it as if it were a Date
+    UDate date = 0;
+    switch (obj.getType())
+    {
+    case Formattable::kDate:
+        date = obj.getDate();
+        break;
+    case Formattable::kDouble:
+        date = (UDate)obj.getDouble();
+        break;
+    case Formattable::kLong:
+        date = (UDate)obj.getLong();
+        break;
+    default:
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return appendTo;
+    }
+
+    // Is this right?
+    //if (fieldPosition.getBeginIndex() == fieldPosition.getEndIndex())
+    //  status = U_ILLEGAL_ARGUMENT_ERROR;
+
+    return format(date, appendTo, posIter, status);
+}
+
+//----------------------------------------------------------------------
+
+// Default implementation for backwards compatibility, subclasses should implement.
+UnicodeString&
+DateFormat::format(Calendar& /* unused cal */,
+                   UnicodeString& appendTo,
+                   FieldPositionIterator* /* unused posIter */,
+                   UErrorCode& status) const {
+    if (U_SUCCESS(status)) {
+        status = U_UNSUPPORTED_ERROR;
+    }
+    return appendTo;
+}
+
+//----------------------------------------------------------------------
+
+UnicodeString&
+DateFormat::format(UDate date, UnicodeString& appendTo, FieldPosition& fieldPosition) const {
+    if (fCalendar != NULL) {
+        // Use a clone of our calendar instance
+        Calendar* calClone = fCalendar->clone();
+        if (calClone != NULL) {
+            UErrorCode ec = U_ZERO_ERROR;
+            calClone->setTime(date, ec);
+            if (U_SUCCESS(ec)) {
+                format(*calClone, appendTo, fieldPosition);
+            }
+            delete calClone;
+        }
+    }
+    return appendTo;
+}
+
+//----------------------------------------------------------------------
+
+UnicodeString&
+DateFormat::format(UDate date, UnicodeString& appendTo, FieldPositionIterator* posIter,
+                   UErrorCode& status) const {
+    if (fCalendar != NULL) {
+        Calendar* calClone = fCalendar->clone();
+        if (calClone != NULL) {
+            calClone->setTime(date, status);
+            if (U_SUCCESS(status)) {
+               format(*calClone, appendTo, posIter, status);
+            }
+            delete calClone;
+        }
+    }
+    return appendTo;
+}
+
+//----------------------------------------------------------------------
+
+UnicodeString&
+DateFormat::format(UDate date, UnicodeString& appendTo) const
+{
+    // Note that any error information is just lost.  That's okay
+    // for this convenience method.
+    FieldPosition fpos(FieldPosition::DONT_CARE);
+    return format(date, appendTo, fpos);
+}
+
+//----------------------------------------------------------------------
+
+UDate
+DateFormat::parse(const UnicodeString& text,
+                  ParsePosition& pos) const
+{
+    UDate d = 0; // Error return UDate is 0 (the epoch)
+    if (fCalendar != NULL) {
+        Calendar* calClone = fCalendar->clone();
+        if (calClone != NULL) {
+            int32_t start = pos.getIndex();
+            calClone->clear();
+            parse(text, *calClone, pos);
+            if (pos.getIndex() != start) {
+                UErrorCode ec = U_ZERO_ERROR;
+                d = calClone->getTime(ec);
+                if (U_FAILURE(ec)) {
+                    // We arrive here if fCalendar => calClone is non-lenient and
+                    // there is an out-of-range field.  We don't know which field
+                    // was illegal so we set the error index to the start.
+                    pos.setIndex(start);
+                    pos.setErrorIndex(start);
+                    d = 0;
+                }
+            }
+            delete calClone;
+        }
+    }
+    return d;
+}
+
+//----------------------------------------------------------------------
+
+UDate
+DateFormat::parse(const UnicodeString& text,
+                  UErrorCode& status) const
+{
+    if (U_FAILURE(status)) return 0;
+
+    ParsePosition pos(0);
+    UDate result = parse(text, pos);
+    if (pos.getIndex() == 0) {
+#if defined (U_DEBUG_CAL)
+      fprintf(stderr, "%s:%d - - failed to parse  - err index %d\n"
+              , __FILE__, __LINE__, pos.getErrorIndex() );
+#endif
+      status = U_ILLEGAL_ARGUMENT_ERROR;
+    }
+    return result;
+}
+
+//----------------------------------------------------------------------
+
+void
+DateFormat::parseObject(const UnicodeString& source,
+                        Formattable& result,
+                        ParsePosition& pos) const
+{
+    result.setDate(parse(source, pos));
+}
+
+//----------------------------------------------------------------------
+
+DateFormat* U_EXPORT2
+DateFormat::createTimeInstance(DateFormat::EStyle style,
+                               const Locale& aLocale)
+{
+    return createDateTimeInstance(kNone, style, aLocale);
+}
+
+//----------------------------------------------------------------------
+
+DateFormat* U_EXPORT2
+DateFormat::createDateInstance(DateFormat::EStyle style,
+                               const Locale& aLocale)
+{
+    return createDateTimeInstance(style, kNone, aLocale);
+}
+
+//----------------------------------------------------------------------
+
+DateFormat* U_EXPORT2
+DateFormat::createDateTimeInstance(EStyle dateStyle,
+                                   EStyle timeStyle,
+                                   const Locale& aLocale)
+{
+   if(dateStyle != kNone)
+   {
+       dateStyle = (EStyle) (dateStyle + kDateOffset);
+   }
+   return create(timeStyle, dateStyle, aLocale);
+}
+
+//----------------------------------------------------------------------
+
+DateFormat* U_EXPORT2
+DateFormat::createInstance()
+{
+    return createDateTimeInstance(kShort, kShort, Locale::getDefault());
+}
+
+//----------------------------------------------------------------------
+
+UnicodeString U_EXPORT2
+DateFormat::getBestPattern(
+        const Locale &locale,
+        const UnicodeString &skeleton,
+        UErrorCode &status) {
+    UnifiedCache *cache = UnifiedCache::getInstance(status);
+    if (U_FAILURE(status)) {
+        return UnicodeString();
+    }
+    DateFmtBestPatternKey key(locale, skeleton, status);
+    const DateFmtBestPattern *patternPtr = NULL;
+    cache->get(key, patternPtr, status);
+    if (U_FAILURE(status)) {
+        return UnicodeString();
+    }
+    UnicodeString result(patternPtr->fPattern);
+    patternPtr->removeRef();
+    return result;
+}
+
+DateFormat* U_EXPORT2
+DateFormat::createInstanceForSkeleton(
+        Calendar *calendarToAdopt,
+        const UnicodeString& skeleton,
+        const Locale &locale,
+        UErrorCode &status) {
+    LocalPointer<Calendar> calendar(calendarToAdopt);
+    if (U_FAILURE(status)) {
+        return NULL;
+    }
+    if (calendar.isNull()) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return NULL;
+    }
+    DateFormat *result = createInstanceForSkeleton(skeleton, locale, status);
+    if (U_FAILURE(status)) {
+        return NULL;
+    }
+    result->adoptCalendar(calendar.orphan());
+    return result;
+}
+
+DateFormat* U_EXPORT2
+DateFormat::createInstanceForSkeleton(
+        const UnicodeString& skeleton,
+        const Locale &locale,
+        UErrorCode &status) {
+    if (U_FAILURE(status)) {
+        return NULL;
+    }
+    LocalPointer<DateFormat> df(
+        new SimpleDateFormat(
+            getBestPattern(locale, skeleton, status),
+            locale, status),
+        status);
+    return U_SUCCESS(status) ? df.orphan() : NULL;
+}
+
+DateFormat* U_EXPORT2
+DateFormat::createInstanceForSkeleton(
+        const UnicodeString& skeleton,
+        UErrorCode &status) {
+    return createInstanceForSkeleton(
+            skeleton, Locale::getDefault(), status);
+}
+
+//----------------------------------------------------------------------
+
+DateFormat* U_EXPORT2
+DateFormat::create(EStyle timeStyle, EStyle dateStyle, const Locale& locale)
+{
+    UErrorCode status = U_ZERO_ERROR;
+#if U_PLATFORM_HAS_WIN32_API
+    char buffer[8];
+    int32_t count = locale.getKeywordValue("compat", buffer, sizeof(buffer), status);
+
+    // if the locale has "@compat=host", create a host-specific DateFormat...
+    if (count > 0 && uprv_strcmp(buffer, "host") == 0) {
+        Win32DateFormat *f = new Win32DateFormat(timeStyle, dateStyle, locale, status);
+
+        if (U_SUCCESS(status)) {
+            return f;
+        }
+
+        delete f;
+    }
+#endif
+
+    // is it relative?
+    if(/*((timeStyle!=UDAT_NONE)&&(timeStyle & UDAT_RELATIVE)) || */((dateStyle!=kNone)&&((dateStyle-kDateOffset) & UDAT_RELATIVE))) {
+        RelativeDateFormat *r = new RelativeDateFormat((UDateFormatStyle)timeStyle, (UDateFormatStyle)(dateStyle-kDateOffset), locale, status);
+        if(U_SUCCESS(status)) return r;
+        delete r;
+        status = U_ZERO_ERROR;
+    }
+
+    // Try to create a SimpleDateFormat of the desired style.
+    SimpleDateFormat *f = new SimpleDateFormat(timeStyle, dateStyle, locale, status);
+    if (U_SUCCESS(status)) return f;
+    delete f;
+
+    // If that fails, try to create a format using the default pattern and
+    // the DateFormatSymbols for this locale.
+    status = U_ZERO_ERROR;
+    f = new SimpleDateFormat(locale, status);
+    if (U_SUCCESS(status)) return f;
+    delete f;
+
+    // This should never really happen, because the preceding constructor
+    // should always succeed.  If the resource data is unavailable, a last
+    // resort object should be returned.
+    return 0;
+}
+
+//----------------------------------------------------------------------
+
+const Locale* U_EXPORT2
+DateFormat::getAvailableLocales(int32_t& count)
+{
+    // Get the list of installed locales.
+    // Even if root has the correct date format for this locale,
+    // it's still a valid locale (we don't worry about data fallbacks).
+    return Locale::getAvailableLocales(count);
+}
+
+//----------------------------------------------------------------------
+
+void
+DateFormat::adoptCalendar(Calendar* newCalendar)
+{
+    delete fCalendar;
+    fCalendar = newCalendar;
+}
+
+//----------------------------------------------------------------------
+void
+DateFormat::setCalendar(const Calendar& newCalendar)
+{
+    Calendar* newCalClone = newCalendar.clone();
+    if (newCalClone != NULL) {
+        adoptCalendar(newCalClone);
+    }
+}
+
+//----------------------------------------------------------------------
+
+const Calendar*
+DateFormat::getCalendar() const
+{
+    return fCalendar;
+}
+
+//----------------------------------------------------------------------
+
+void
+DateFormat::adoptNumberFormat(NumberFormat* newNumberFormat)
+{
+    delete fNumberFormat;
+    fNumberFormat = newNumberFormat;
+    newNumberFormat->setParseIntegerOnly(TRUE);
+}
+//----------------------------------------------------------------------
+
+void
+DateFormat::setNumberFormat(const NumberFormat& newNumberFormat)
+{
+    NumberFormat* newNumFmtClone = (NumberFormat*)newNumberFormat.clone();
+    if (newNumFmtClone != NULL) {
+        adoptNumberFormat(newNumFmtClone);
+    }
+}
+
+//----------------------------------------------------------------------
+
+const NumberFormat*
+DateFormat::getNumberFormat() const
+{
+    return fNumberFormat;
+}
+
+//----------------------------------------------------------------------
+
+void
+DateFormat::adoptTimeZone(TimeZone* zone)
+{
+    if (fCalendar != NULL) {
+        fCalendar->adoptTimeZone(zone);
+    }
+}
+//----------------------------------------------------------------------
+
+void
+DateFormat::setTimeZone(const TimeZone& zone)
+{
+    if (fCalendar != NULL) {
+        fCalendar->setTimeZone(zone);
+    }
+}
+
+//----------------------------------------------------------------------
+
+const TimeZone&
+DateFormat::getTimeZone() const
+{
+    if (fCalendar != NULL) {
+        return fCalendar->getTimeZone();
+    }
+    // If calendar doesn't exists, create default timezone.
+    // fCalendar is rarely null
+    return *(TimeZone::createDefault());
+}
+
+//----------------------------------------------------------------------
+
+void
+DateFormat::setLenient(UBool lenient)
+{
+    if (fCalendar != NULL) {
+        fCalendar->setLenient(lenient);
+    }
+    UErrorCode status = U_ZERO_ERROR;
+    setBooleanAttribute(UDAT_PARSE_ALLOW_WHITESPACE, lenient, status);
+    setBooleanAttribute(UDAT_PARSE_ALLOW_NUMERIC, lenient, status);
+}
+
+//----------------------------------------------------------------------
+
+UBool
+DateFormat::isLenient() const
+{
+    UBool lenient = TRUE;
+    if (fCalendar != NULL) {
+        lenient = fCalendar->isLenient();
+    }
+    UErrorCode status = U_ZERO_ERROR;
+    return lenient
+        && getBooleanAttribute(UDAT_PARSE_ALLOW_WHITESPACE, status)
+        && getBooleanAttribute(UDAT_PARSE_ALLOW_NUMERIC, status);
+}
+
+void
+DateFormat::setCalendarLenient(UBool lenient)
+{
+    if (fCalendar != NULL) {
+        fCalendar->setLenient(lenient);
+    }
+}
+
+//----------------------------------------------------------------------
+
+UBool
+DateFormat::isCalendarLenient() const
+{
+    if (fCalendar != NULL) {
+        return fCalendar->isLenient();
+    }
+    // fCalendar is rarely null
+    return FALSE;
+}
+
+
+//----------------------------------------------------------------------
+
+
+void DateFormat::setContext(UDisplayContext value, UErrorCode& status)
+{
+    if (U_FAILURE(status))
+        return;
+    if ( (UDisplayContextType)((uint32_t)value >> 8) == UDISPCTX_TYPE_CAPITALIZATION ) {
+        fCapitalizationContext = value;
+    } else {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+   }
+}
+
+
+//----------------------------------------------------------------------
+
+
+UDisplayContext DateFormat::getContext(UDisplayContextType type, UErrorCode& status) const
+{
+    if (U_FAILURE(status))
+        return (UDisplayContext)0;
+    if (type != UDISPCTX_TYPE_CAPITALIZATION) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+        return (UDisplayContext)0;
+    }
+    return fCapitalizationContext;
+}
+
+
+//----------------------------------------------------------------------
+
+
+DateFormat& 
+DateFormat::setBooleanAttribute(UDateFormatBooleanAttribute attr,
+    									UBool newValue,
+    									UErrorCode &status) {
+    if(!fBoolFlags.isValidValue(newValue)) {
+        status = U_ILLEGAL_ARGUMENT_ERROR;
+    } else {
+        fBoolFlags.set(attr, newValue);
+    }
+
+    return *this;
+}
+
+//----------------------------------------------------------------------
+
+UBool 
+DateFormat::getBooleanAttribute(UDateFormatBooleanAttribute attr, UErrorCode &/*status*/) const {
+
+    return fBoolFlags.get(attr);
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+//eof