How to figure out if a file is a link?

I have the below code only a part of it is shown here and I am checking if a the type of file.

struct stat *buf /* just to show the type buf is*/ 

switch (buf.st_mode & S_IFMT) {
     case S_IFBLK:  printf(" block device\n");            break;
     case S_IFCHR:  printf(" character device\n");        break;
     case S_IFDIR:  printf(" directory\n");               break;
     case S_IFIFO:  printf(" FIFO/pipe\n");               break;
     case S_IFLNK:  printf(" symlink\n");                 break;
     case S_IFREG:  printf(" regular file\n");            break;
     case S_IFSOCK: printf(" socket\n");                  break;
     default:       printf(" unknown?\n");                break;
}

The problem: value of st_mode obtained when I do a printf("\nMode: %d\n",buf.st_mode); the result is 33188.

I tested my program with a regular file type and a symbolic link. In both cases the output was "regular file" i.e the symbolic link case is failing and I fail to understand why?