Function namestring, file-namestring, directory-namestring, host-namestring, enough-namestring

Syntax:

Arguments and Values:

pathname—a pathname designator.

defaults—a pathname designator. The default is the value of *default-pathname-defaults*.

namestring—a string or nil. Editor: KMP: Under what circumstances can NIL be returned??!!!

Description:

Reference to conversion of symbol to a pathname removed.

These functions convert pathname into a namestring. 23.1.2 31The name represented by pathname is returned as a namestring in an implementation-dependent canonical form.

23.1.2 33namestring returns the full form of pathname.

file-namestring returns just the name, type, and version components of pathname.

directory-namestring returns the directory name portion.

host-namestring returns the host name. 23.1.2 34

enough-namestring returns an abbreviated namestring that is just sufficient to identify the file named by pathname when considered relative to the defaults. It is required that

 (merge-pathnames (enough-namestring pathname defaults) defaults)
≡ (merge-pathnames (parse-namestring pathname nil defaults) defaults)

It is not necessarily possible to construct a valid namestring by concatenating some of the three shorter namestrings in some order.

Examples:

!!! This example needs to use real filenames instead of "\i{directory-name}", etc.

 (namestring "getty")            
→ "getty"
 (setq q (make-pathname :host "kathy" 
                         :directory 
                           (pathname-directory *default-pathname-defaults*)
                         :name "getty")) 
→ #S(PATHNAME :HOST "kathy" :DEVICE NIL :DIRECTORY directory-name 
       :NAME "getty" :TYPE NIL :VERSION NIL)
 (file-namestring q) → "getty"
 (directory-namestring q) → directory-name
 (host-namestring q) → "kathy" 

 ;;;Using Unix syntax and the wildcard conventions used by the
 ;;;particular version of Unix on which this example was created:
 (namestring
   (translate-pathname "/usr/dmr/hacks/frob.l"
                       "/usr/d*/hacks/*.l"
                       "/usr/d*/backup/hacks/backup-*.*"))
→ "/usr/dmr/backup/hacks/backup-frob.l"
 (namestring
   (translate-pathname "/usr/dmr/hacks/frob.l"
                       "/usr/d*/hacks/fr*.l"
                       "/usr/d*/backup/hacks/backup-*.*"))
→ "/usr/dmr/backup/hacks/backup-ob.l"
 
 ;;;This is similar to the above example but uses two different hosts,
 ;;;U: which is a Unix and V: which is a VMS.  Note the translation
 ;;;of file type and alphabetic case conventions.
 (namestring
   (translate-pathname "U:/usr/dmr/hacks/frob.l"
                       "U:/usr/d*/hacks/*.l"
                       "V:SYS$DISK:[D*.BACKUP.HACKS]BACKUP-*.*"))
→ "V:SYS$DISK:[DMR.BACKUP.HACKS]BACKUP-FROB.LSP"
 (namestring
   (translate-pathname "U:/usr/dmr/hacks/frob.l"
                       "U:/usr/d*/hacks/fr*.l"
                       "V:SYS$DISK:[D*.BACKUP.HACKS]BACKUP-*.*"))
→ "V:SYS$DISK:[DMR.BACKUP.HACKS]BACKUP-OB.LSP"

Affected By:

None.

Exceptional Situations:

None.

See Also:

truename, merge-pathnames, pathname, logical-pathname, Section 20.1 (File System Concepts), Section 19.1.2 (Pathnames as Filenames)

Notes:

None.