NSApplication+SystemVersion.m

/*
 * Project:     SoftwareUpdateEnabler
 * File:        NSApplication+SystemVersion.m
 * Author:      Andrew Wellington
 *
 * License:
 * Copyright (C) 2005-2009 Andrew Wellington.
 * 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.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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 THE AUTHOR 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.
 */
 
 /**** This implementation taken from CocoaDev. http://www.cocoadev.com/index.pl?DeterminingOSVersion ****/
 

#import "NSApplication+SystemVersion.h"


@implementation NSApplication (SUE_SystemVersion)

- (void)SUE_getSystemVersionMajor:(unsigned *)major
                        minor:(unsigned *)minor
                       bugFix:(unsigned *)bugFix;
{
    OSErr err;
    SInt32 systemVersion, versionMajor, versionMinor, versionBugFix;
    if ((err = Gestalt(gestaltSystemVersion, &systemVersion)) != noErr) goto fail;
    if (systemVersion < 0x1040)
    {
        if (major) *major = ((systemVersion & 0xF000) >> 12) * 10 +
            ((systemVersion & 0x0F00) >> 8);
        if (minor) *minor = (systemVersion & 0x00F0) >> 4;
        if (bugFix) *bugFix = (systemVersion & 0x000F);
    }
    else
    {
        if ((err = Gestalt(gestaltSystemVersionMajor, &versionMajor)) != noErr) goto fail;
        if ((err = Gestalt(gestaltSystemVersionMinor, &versionMinor)) != noErr) goto fail;
        if ((err = Gestalt(gestaltSystemVersionBugFix, &versionBugFix)) != noErr) goto fail;
        if (major) *major = versionMajor;
        if (minor) *minor = versionMinor;
        if (bugFix) *bugFix = versionBugFix;
    }
    
    return;
    
fail:
    NSLog(@"Unable to obtain system version: %ld", (long)err);
    if (major) *major = 10;
    if (minor) *minor = 0;
    if (bugFix) *bugFix = 0;
}

@end