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//
// SUVersionComparisonProtocol.h
// Sparkle
//
// Created by Andy Matuschak on 12/21/07.
// Copyright 2007 Andy Matuschak. All rights reserved.
//

#ifndef SUVERSIONCOMPARISONPROTOCOL_H
#define SUVERSIONCOMPARISONPROTOCOL_H

#import <Cocoa/Cocoa.h>

/*!
@protocol
@abstract Implement this protocol to provide version comparison facilities for Sparkle.
*/
@protocol SUVersionComparison

/*!
@method
@abstract An abstract method to compare two version strings.
@discussion Should return NSOrderedAscending if b > a, NSOrderedDescending if b < a, and NSOrderedSame if they are equivalent.
*/
- (NSComparisonResult)compareVersion:(NSString *)versionA toVersion:(NSString *)versionB; // *** MAY BE CALLED ON NON-MAIN THREAD!

@end

#endif
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