1 ;;;; the known-to-the-cross-compiler part of PATHNAME logic
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
12 (in-package "SB!IMPL")
14 ;;;; data types used by pathnames
16 ;;; The HOST structure holds the functions that both parse the
17 ;;; pathname information into structure slot entries, and after
18 ;;; translation the inverse (unparse) functions.
19 (def!struct (host (:constructor nil))
20 (parse (missing-arg) :type function)
21 (parse-native (missing-arg) :type function)
22 (unparse (missing-arg) :type function)
23 (unparse-native (missing-arg) :type function)
24 (unparse-host (missing-arg) :type function)
25 (unparse-directory (missing-arg) :type function)
26 (unparse-file (missing-arg) :type function)
27 (unparse-enough (missing-arg) :type function)
28 (unparse-directory-separator (missing-arg) :type simple-string)
29 (simplify-namestring (missing-arg) :type function)
30 (customary-case (missing-arg) :type (member :upper :lower)))
32 (def!method print-object ((host host) stream)
33 (print-unreadable-object (host stream :type t :identity t)))
35 (def!struct (logical-host
36 (:make-load-form-fun make-logical-host-load-form-fun)
38 (parse #'parse-logical-namestring)
41 (error "called PARSE-NATIVE-NAMESTRING using a ~
42 logical host: ~S" x)))
43 (unparse #'unparse-logical-namestring)
46 (error "called NATIVE-NAMESTRING using a ~
47 logical host: ~S" x)))
50 (logical-host-name (%pathname-host x))))
51 (unparse-directory #'unparse-logical-directory)
52 (unparse-file #'unparse-logical-file)
53 (unparse-enough #'unparse-enough-namestring)
54 (unparse-directory-separator ";")
55 (simplify-namestring #'identity)
56 (customary-case :upper)))
57 (name "" :type simple-string)
58 (translations nil :type list)
59 (canon-transls nil :type list))
61 (def!method print-object ((logical-host logical-host) stream)
62 (print-unreadable-object (logical-host stream :type t)
63 (prin1 (logical-host-name logical-host) stream)))
65 (defun make-logical-host-load-form-fun (logical-host)
66 (values `(find-logical-host ',(logical-host-name logical-host))
69 ;;; A PATTERN is a list of entries and wildcards used for pattern
70 ;;; matches of translations.
71 (def!struct (pattern (:constructor make-pattern (pieces)))
72 (pieces nil :type list))
74 ;;;; PATHNAME structures
76 ;;; the various magic tokens that are allowed to appear in pretty much
77 ;;; all pathname components
78 (eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
79 (def!type pathname-component-tokens ()
80 '(member nil :unspecific :wild)))
82 (sb!xc:defstruct (pathname (:conc-name %pathname-)
83 (:constructor %make-pathname (host
89 (:predicate pathnamep))
90 ;; the host (at present either a UNIX or logical host)
91 (host nil :type (or host null))
92 ;; the name of a logical or physical device holding files
93 (device nil :type (or simple-string pathname-component-tokens))
94 ;; a list of strings that are the component subdirectory components
95 (directory nil :type list)
97 (name nil :type (or simple-string pattern pathname-component-tokens))
98 ;; the type extension of the file
99 (type nil :type (or simple-string pattern pathname-component-tokens))
100 ;; the version number of the file, a positive integer (not supported
101 ;; on standard Unix filesystems)
102 (version nil :type (or integer pathname-component-tokens (member :newest))))
104 ;;; Logical pathnames have the following format:
106 ;;; logical-namestring ::=
107 ;;; [host ":"] [";"] {directory ";"}* [name] ["." type ["." version]]
110 ;;; directory ::= word | wildcard-word | **
111 ;;; name ::= word | wildcard-word
112 ;;; type ::= word | wildcard-word
113 ;;; version ::= pos-int | newest | NEWEST | *
114 ;;; word ::= {uppercase-letter | digit | -}+
115 ;;; wildcard-word ::= [word] '* {word '*}* [word]
116 ;;; pos-int ::= integer > 0
118 ;;; Physical pathnames include all these slots and a device slot.
120 ;;; Logical pathnames are a subclass of PATHNAME. Their class
121 ;;; relations are mimicked using structures for efficiency.
122 (sb!xc:defstruct (logical-pathname (:conc-name %logical-pathname-)
124 (:constructor %make-logical-pathname