Four-char UInt32 type codes to NSString and back

gistfile1.txt

NSString *ABTypeCodeToString(UInt32 typeCode)
{
    char string[5] = {*(((char*)&typeCode)+3), *(((char*)&typeCode)+2), *(((char*)&typeCode)+1), *(((char*)&typeCode)+0),0};
    NSString *codeWithDot = @(string);
    return [codeWithDot stringByTrimmingCharactersInSet:NSCharacterSet.punctuationCharacterSet];
}


UInt32 ABStringToTypeCode(NSString *typeString)
{
    const char *s = typeString.UTF8String;
    UInt32 typeCode = s[3] | (s[2] << 8) | (s[1] << 16) | (s[0] << 24);
    return typeCode;
}