OSType, FourCharCode to NSString

OSTypeFourCharCodeToNSString.m

// XX is own prefix
NSString *XXStringForOSType(OSType type) {
    unichar c[4];
    c[0] = (type >> 24) & 0xFF;
    c[1] = (type >> 16) & 0xFF;
    c[2] = (type >> 8) & 0xFF;
    c[3] = (type >> 0) & 0xFF;
    NSString *string = [NSString stringWithCharacters:c length:4];
    return string;
}

- (void)test
{
    OSType type = 'appl';
#if !TARGET_OS_IOS
    NSLog(@"type = %@", NSFileTypeForHFSTypeCode(type));
    // type = 'appl'
    NSLog(@"type = %@", CFBridgingRelease(UTCreateStringForOSType(type)));
    // type = appl
#endif
    NSLog(@"type = %@", XXStringForOSType(type));
    // type = appl
}