gistfile1.m

SIDeviceModel SIRetrieveDeviceModel(void)
{
	if( cachedDeviceModel == SIDM_UNKNOWN )
	{
		// Get the system platform name
		size_t size;
		sysctlbyname("hw.machine", NULL, &size, NULL, 0);
		char *machine = malloc(size);
		sysctlbyname("hw.machine", machine, &size, NULL, 0);
		NSString *platform = @(machine);
		free(machine);
		
		if(      [platform isEqualToString:@"iPhone1,1"] )	cachedDeviceModel = SIDM_IPHONE_EDGE;
		else if( [platform isEqualToString:@"iPhone1,2"] )	cachedDeviceModel = SIDM_IPHONE_3G;
		else if( [platform isEqualToString:@"iPhone2,1"] )	cachedDeviceModel = SIDM_IPHONE_3GS;
		else if( [platform isEqualToString:@"iPhone3,1"] )	cachedDeviceModel = SIDM_IPHONE_4;
        else if( [platform isEqualToString:@"iPhone3,2"] )	cachedDeviceModel = SIDM_IPHONE_4_VERIZON_CDMA;
        else if( [platform isEqualToString:@"iPhone3,3"] )  cachedDeviceModel = SIDM_IPHONE_4_VERIZON;
        else if( [platform isEqualToString:@"iPhone4,1"] )  cachedDeviceModel = SIDM_IPHONE_4S;
        else if( [platform isEqualToString:@"iPhone5,1"] )  cachedDeviceModel = SIDM_IPHONE_5;
		else if( [platform containsString:@"iPhone"] )		cachedDeviceModel = SIDM_IPHONE_UNKNOWN_NEWER;
		else if( [platform isEqualToString:@"iPod1,1"] )	cachedDeviceModel = SIDM_IPOD_1G;
		else if( [platform isEqualToString:@"iPod2,1"] )	cachedDeviceModel = SIDM_IPOD_2G;
		else if( [platform isEqualToString:@"iPod3,1"] )	cachedDeviceModel = SIDM_IPOD_3G;
		else if( [platform isEqualToString:@"iPod4,1"] )	cachedDeviceModel = SIDM_IPOD_4G;
		else if( [platform containsString:@"iPod"] )		cachedDeviceModel = SIDM_IPOD_UNKNOWN_NEWER;
		else if( [platform isEqualToString:@"iPad1,1"] )	cachedDeviceModel = SIDM_IPAD;
        else if( [platform isEqualToString:@"iPad2,1"] )    cachedDeviceModel = SIDM_IPAD_2;
        else if( [platform isEqualToString:@"iPad2,2"] )    cachedDeviceModel = SIDM_IPAD_2_GSM;
        else if( [platform isEqualToString:@"iPad2,3"] )    cachedDeviceModel = SIDM_IPAD_2_CDMA;
        else if( [platform isEqualToString:@"iPad2,4"] )    cachedDeviceModel = SIDM_IPAD_2_R2;
        else if( [platform isEqualToString:@"iPad3,1"] )    cachedDeviceModel = SIDM_IPAD_3;
        else if( [platform isEqualToString:@"iPad3,2"] )    cachedDeviceModel = SIDM_IPAD_3_CDMA;
        else if( [platform isEqualToString:@"iPad3,3"] )    cachedDeviceModel = SIDM_IPAD_3_GSM;
		else if( [platform containsString:@"iPad"] )		cachedDeviceModel = SIDM_IPAD_UNKNOWN_NEWER;
		else if( [platform containsString:@"i386"] )		cachedDeviceModel = SIDM_SIMULATOR;
        else if( [platform containsString:@"x86_64"] )		cachedDeviceModel = SIDM_SIMULATOR;
		else cachedDeviceModel = SIDM_UNKNOWN;
	}
	
	return cachedDeviceModel;
}