370 lines
10 KiB
C++
370 lines
10 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 1997-1999, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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*******************************************************************************
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*
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* File DATEFMT.CPP
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*
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* Modification History:
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*
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* Date Name Description
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* 02/19/97 aliu Converted from java.
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* 03/31/97 aliu Modified extensively to work with 50 locales.
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* 04/01/97 aliu Added support for centuries.
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* 08/12/97 aliu Fixed operator== to use Calendar::equivalentTo.
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* 07/20/98 stephen Changed ParsePosition initialization
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********************************************************************************
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*/
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#include "unicode/resbund.h"
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#include "unicode/datefmt.h"
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#include "unicode/smpdtfmt.h"
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#include "mutex.h"
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// *****************************************************************************
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// class DateFormat
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// *****************************************************************************
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int32_t DateFormat::fgLocalesCount;
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const Locale* DateFormat::fgLocales = 0;
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DateFormat::DateFormat()
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: fCalendar(0),
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fNumberFormat(0)
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{
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}
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//----------------------------------------------------------------------
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DateFormat::DateFormat(const DateFormat& other)
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: fCalendar(0),
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fNumberFormat(0)
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{
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*this = other;
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}
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//----------------------------------------------------------------------
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DateFormat& DateFormat::operator=(const DateFormat& other)
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{
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if (this != &other)
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{
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delete fCalendar;
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delete fNumberFormat;
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fCalendar = other.fCalendar->clone();
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fNumberFormat = (NumberFormat*)other.fNumberFormat->clone();
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}
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return *this;
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}
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//----------------------------------------------------------------------
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DateFormat::~DateFormat()
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{
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delete fCalendar;
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delete fNumberFormat;
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}
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//----------------------------------------------------------------------
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UBool
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DateFormat::operator==(const Format& other) const
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{
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// This protected comparison operator should only be called by subclasses
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// which have confirmed that the other object being compared against is
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// an instance of a sublcass of DateFormat. THIS IS IMPORTANT.
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// We only dereference this pointer after we have confirmed below that
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// 'other' is a DateFormat subclass.
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DateFormat* fmt = (DateFormat*)&other;
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return (this == fmt) ||
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((getDynamicClassID() == other.getDynamicClassID()) &&
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fCalendar->equivalentTo(*fmt->fCalendar) &&
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(*fNumberFormat == *fmt->fNumberFormat));
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}
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//----------------------------------------------------------------------
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UnicodeString&
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DateFormat::format(const Formattable& obj,
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UnicodeString& toAppendTo,
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FieldPosition& fieldPosition,
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UErrorCode& status) const
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{
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if (U_FAILURE(status)) return toAppendTo;
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// if the type of the Formattable is double or long, treat it as if it were a Date
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switch (obj.getType())
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{
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case Formattable::kDate:
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format(obj.getDate(), toAppendTo, fieldPosition);
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break;
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case Formattable::kDouble:
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format((UDate)obj.getDouble(), toAppendTo, fieldPosition);
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break;
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case Formattable::kLong:
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format((UDate)obj.getLong(), toAppendTo, fieldPosition);
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break;
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default:
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return toAppendTo;
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}
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// Is this right?
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//if (fieldPosition.getBeginIndex() == fieldPosition.getEndIndex())
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// status = U_ILLEGAL_ARGUMENT_ERROR;
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return toAppendTo;
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}
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//----------------------------------------------------------------------
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UnicodeString&
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DateFormat::format(UDate date, UnicodeString& result) const
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{
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// Note that any error information is just lost. That's okay
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// for this convenience method.
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FieldPosition fpos(0);
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format(date, result, fpos);
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return result;
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}
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//----------------------------------------------------------------------
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UDate
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DateFormat::parse(const UnicodeString& text,
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UErrorCode& status) const
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{
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if (U_FAILURE(status)) return 0;
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ParsePosition pos(0);
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UDate result = parse(text, pos);
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if (pos.getIndex() == 0) status = U_ILLEGAL_ARGUMENT_ERROR;
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return result;
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}
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//----------------------------------------------------------------------
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void
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DateFormat::parseObject(const UnicodeString& source,
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Formattable& result,
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ParsePosition& pos) const
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{
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result.setDate(parse(source, pos));
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}
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//----------------------------------------------------------------------
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DateFormat*
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DateFormat::createTimeInstance(DateFormat::EStyle style,
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const Locale& aLocale)
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{
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return create(style, kNone, aLocale);
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}
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//----------------------------------------------------------------------
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DateFormat*
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DateFormat::createDateInstance(DateFormat::EStyle style,
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const Locale& aLocale)
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{
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// +4 to set the correct index for getting data out of
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// LocaleElements.
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if(style != kNone)
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{
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style = (EStyle) (style + kDateOffset);
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}
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return create(kNone, (EStyle) (style), aLocale);
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}
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//----------------------------------------------------------------------
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DateFormat*
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DateFormat::createDateTimeInstance(EStyle dateStyle,
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EStyle timeStyle,
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const Locale& aLocale)
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{
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if(dateStyle != kNone)
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{
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dateStyle = (EStyle) (dateStyle + kDateOffset);
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}
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return create(timeStyle, dateStyle, aLocale);
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}
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//----------------------------------------------------------------------
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DateFormat*
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DateFormat::createInstance()
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{
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return create(kShort, (EStyle) (kShort + kDateOffset), Locale::getDefault());
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}
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//----------------------------------------------------------------------
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DateFormat*
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DateFormat::create(EStyle timeStyle, EStyle dateStyle, const Locale& locale)
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{
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// Try to create a SimpleDateFormat of the desired style.
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UErrorCode status = U_ZERO_ERROR;
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SimpleDateFormat *f = new SimpleDateFormat(timeStyle, dateStyle, locale, status);
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if (U_SUCCESS(status)) return f;
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delete f;
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// If that fails, try to create a format using the default pattern and
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// the DateFormatSymbols for this locale.
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status = U_ZERO_ERROR;
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f = new SimpleDateFormat(locale, status);
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if (U_SUCCESS(status)) return f;
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delete f;
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// This should never really happen, because the preceding constructor
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// should always succeed. If the resource data is unavailable, a last
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// resort object should be returned.
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return 0;
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}
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//----------------------------------------------------------------------
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const Locale*
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DateFormat::getAvailableLocales(int32_t& count)
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{
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// return LocaleData.getAvailableLocales("DateTimePatterns");
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// We only do this computation once. Thereafter, we keep it in the static
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// fgLocalesArray. What we do is iterate over all the locales, and try to
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// load a specific resource from them which indicates that they have
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// date format data.
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if (!fgLocales)
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{
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// This is going to load all the locale resource bundles into the
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// cache!
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int32_t localesCount;
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const Locale* locales = Locale::getAvailableLocales(localesCount);
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Locale* temp = new Locale[localesCount];
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int32_t newLocalesCount = 0;
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int32_t i;
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for (i=0; i<localesCount; ++i)
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{
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UErrorCode status = U_ZERO_ERROR;
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ResourceBundle resource((char *)0, locales[i], status);
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resource.get(SimpleDateFormat::fgDateTimePatternsTag, status);
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if (U_SUCCESS(status))
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{
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temp[newLocalesCount++] = locales[i];
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}
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}
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Locale *newLocales = new Locale[newLocalesCount];
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for (i=0; i<newLocalesCount; ++i) ((Locale*)newLocales)[i] = temp[i]; // Cast away const
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delete[] temp;
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Mutex lock;
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if(!fgLocales)
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{
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fgLocalesCount = newLocalesCount;
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fgLocales = newLocales;
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}
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else
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{
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delete [] newLocales; // *shrug*
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}
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}
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count = fgLocalesCount;
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return fgLocales;
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}
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//----------------------------------------------------------------------
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void
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DateFormat::adoptCalendar(Calendar* newCalendar)
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{
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delete fCalendar;
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fCalendar = newCalendar;
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}
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//----------------------------------------------------------------------
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void
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DateFormat::setCalendar(const Calendar& newCalendar)
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{
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adoptCalendar(newCalendar.clone());
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}
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//----------------------------------------------------------------------
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const Calendar*
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DateFormat::getCalendar() const
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{
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return fCalendar;
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}
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//----------------------------------------------------------------------
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void
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DateFormat::adoptNumberFormat(NumberFormat* newNumberFormat)
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{
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delete fNumberFormat;
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fNumberFormat = newNumberFormat;
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}
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//----------------------------------------------------------------------
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void
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DateFormat::setNumberFormat(const NumberFormat& newNumberFormat)
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{
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adoptNumberFormat((NumberFormat*)newNumberFormat.clone());
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}
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//----------------------------------------------------------------------
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const NumberFormat*
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DateFormat::getNumberFormat() const
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{
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return fNumberFormat;
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}
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//----------------------------------------------------------------------
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void
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DateFormat::adoptTimeZone(TimeZone* zone)
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{
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fCalendar->adoptTimeZone(zone);
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}
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//----------------------------------------------------------------------
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void
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DateFormat::setTimeZone(const TimeZone& zone)
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{
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fCalendar->setTimeZone(zone);
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}
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//----------------------------------------------------------------------
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const TimeZone&
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DateFormat::getTimeZone() const
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{
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return fCalendar->getTimeZone();
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}
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//----------------------------------------------------------------------
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void
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DateFormat::setLenient(UBool lenient)
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{
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fCalendar->setLenient(lenient);
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}
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//----------------------------------------------------------------------
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UBool
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DateFormat::isLenient() const
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{
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return fCalendar->isLenient();
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}
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//eof
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