Check in the pristine copy of ICU 4.6...

icu46/source/i18n/datefmt.cpp

+/*
+ *******************************************************************************
+ * Copyright (C) 1997-2010, 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 "reldtfmt.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
+
+DateFormat::DateFormat()
+:   fCalendar(0),
+    fNumberFormat(0)
+{
+}
+
+//----------------------------------------------------------------------
+
+DateFormat::DateFormat(const DateFormat& other)
+:   Format(other),
+    fCalendar(0),
+    fNumberFormat(0)
+{
+    *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;
+        }
+    }
+    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));
+}
+
+//----------------------------------------------------------------------
+
+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 our calendar instance
+        UErrorCode ec = U_ZERO_ERROR;
+        fCalendar->setTime(date, ec);
+        if (U_SUCCESS(ec)) {
+            return format(*fCalendar, appendTo, fieldPosition);
+        }
+    }
+    return appendTo;
+}
+
+//----------------------------------------------------------------------
+
+UnicodeString&
+DateFormat::format(UDate date, UnicodeString& appendTo, FieldPositionIterator* posIter,
+                   UErrorCode& status) const {
+    if (fCalendar != NULL) {
+        fCalendar->setTime(date, status);
+        if (U_SUCCESS(status)) {
+            return format(*fCalendar, appendTo, posIter, status);
+        }
+    }
+    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(0);
+    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) {
+        int32_t start = pos.getIndex();
+
+        // Parse may update TimeZone used by the calendar.
+        TimeZone *tzsav = (TimeZone*)fCalendar->getTimeZone().clone();
+
+        fCalendar->clear();
+        parse(text, *fCalendar, pos);
+        if (pos.getIndex() != start) {
+            UErrorCode ec = U_ZERO_ERROR;
+            d = fCalendar->getTime(ec);
+            if (U_FAILURE(ec)) {
+                // We arrive here if fCalendar 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;
+            }
+        }
+
+        // Restore TimeZone
+        fCalendar->adoptTimeZone(tzsav);
+    }
+    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 create(style, kNone, aLocale);
+}
+
+//----------------------------------------------------------------------
+
+DateFormat* U_EXPORT2
+DateFormat::createDateInstance(DateFormat::EStyle style,
+                               const Locale& aLocale)
+{
+    // +4 to set the correct index for getting data out of
+    // LocaleElements.
+    if(style != kNone)
+    {
+        style = (EStyle) (style + kDateOffset);
+    }
+    return create(kNone, (EStyle) (style), 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 create(kShort, (EStyle) (kShort + kDateOffset), Locale::getDefault());
+}
+
+//----------------------------------------------------------------------
+
+DateFormat* U_EXPORT2
+DateFormat::create(EStyle timeStyle, EStyle dateStyle, const Locale& locale)
+{
+    UErrorCode status = U_ZERO_ERROR;
+#ifdef U_WINDOWS
+    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);
+    }
+}
+
+//----------------------------------------------------------------------
+
+UBool
+DateFormat::isLenient() const
+{
+    if (fCalendar != NULL) {
+        return fCalendar->isLenient();
+    }
+    // fCalendar is rarely null
+    return FALSE;
+}
+
+U_NAMESPACE_END
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
+
+//eof