/*
 * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer. 
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#import <WebKit/WebNSCalendarDateExtras.h>

#import <JavaScriptCore/Assertions.h>

@implementation NSCalendarDate (WebNSCalendarDateExtras)

- (NSComparisonResult) _webkit_compareDay: (NSCalendarDate *)anotherDate
{
    int year, yearOther, month, monthOther, day, dayOther;
    
    if (self == anotherDate) {
        return NSOrderedSame;
    }

    year = [self yearOfCommonEra];
    yearOther = [anotherDate yearOfCommonEra];
    if (year < yearOther) {
        return NSOrderedAscending;
    }
    if (year > yearOther) {
        return NSOrderedDescending;
    }

    month = [self monthOfYear];
    monthOther = [anotherDate monthOfYear];
    if (month < monthOther) {
        return NSOrderedAscending;
    }
    if (month > monthOther) {
        return NSOrderedDescending;
    }

    day = [self dayOfMonth];
    dayOther = [anotherDate dayOfMonth];
    if (day < dayOther) {
        return NSOrderedAscending;
    }
    if (day > dayOther) {
        return NSOrderedDescending;
    }

    return NSOrderedSame;
}

@end