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• Loader

Vl-find-file

Determine where to load a file from, given its (absolute or relative) name and a list of directories to search.

Signature

(vl-find-file filename searchcache state) 
  → 
(mv realpath state)

Arguments

filename — Absolute or relative name of the file you want to load.
    Guard (stringp filename).

searchcache — Directories to search, with cached file lists.
    Guard (vl-dirlist-cache-p searchcache).

Returns

realpath — On success, the full dirname/filename path to the first found file. Otherwise NIL to indicate that no such file is found in any of these directories.
    Type (maybe-stringp realpath).

state — Type (state-p1 state), given (force (state-p1 state)).

Definitions and Theorems

Function: vl-find-file

(defun vl-find-file (filename searchcache state)
  (declare (xargs :stobjs (state)))
  (declare (xargs :guard (and (stringp filename)
                              (vl-dirlist-cache-p searchcache))))
  (let ((__function__ 'vl-find-file))
    (declare (ignorable __function__))
    (b* ((filename (string-fix filename))
         ((when (acl2::absolute-pathname-string-p
                     filename nil (acl2::os (w state))))
          (mv filename state))
         ((when (or (str::substrp "/" filename)
                    (str::substrp "\\" filename)))
          (vl-slow-find-file-aux filename searchcache state)))
      (mv (vl-cache-find-file-aux filename searchcache)
          state))))

Theorem: maybe-stringp-of-vl-find-file.realpath

(defthm maybe-stringp-of-vl-find-file.realpath
  (b* (((mv ?realpath acl2::?state)
        (vl-find-file filename searchcache state)))
    (maybe-stringp realpath))
  :rule-classes :type-prescription)

Theorem: state-p1-of-vl-find-file.state

(defthm state-p1-of-vl-find-file.state
  (implies (force (state-p1 state))
           (b* (((mv ?realpath acl2::?state)
                 (vl-find-file filename searchcache state)))
             (state-p1 state)))
  :rule-classes :rewrite)

Theorem: vl-find-file-of-str-fix-filename

(defthm vl-find-file-of-str-fix-filename
  (equal (vl-find-file (str-fix filename)
                       searchcache state)
         (vl-find-file filename searchcache state)))

Theorem: vl-find-file-streqv-congruence-on-filename

(defthm vl-find-file-streqv-congruence-on-filename
  (implies (streqv filename filename-equiv)
           (equal (vl-find-file filename searchcache state)
                  (vl-find-file filename-equiv searchcache state)))
  :rule-classes :congruence)

Theorem: vl-find-file-of-vl-dirlist-cache-fix-searchcache

(defthm vl-find-file-of-vl-dirlist-cache-fix-searchcache
  (equal (vl-find-file filename
                       (vl-dirlist-cache-fix searchcache)
                       state)
         (vl-find-file filename searchcache state)))

Theorem: vl-find-file-vl-dirlist-cache-equiv-congruence-on-searchcache

(defthm
      vl-find-file-vl-dirlist-cache-equiv-congruence-on-searchcache
  (implies (vl-dirlist-cache-equiv searchcache searchcache-equiv)
           (equal (vl-find-file filename searchcache state)
                  (vl-find-file filename searchcache-equiv state)))
  :rule-classes :congruence)

Subtopics

Vl-slow-find-file-aux

Look for a file in a list of search directories (without using the cache).

Vl-cache-find-file-aux

Alternative to vl-slow-find-file-aux using a vl-dirlist-cache-p.

Vl-extend-pathname

(vl-extend-pathname dir filename) concatenates dir and filename, adding a slash to between them only if dir does not end with a slash.

Vl-file-exists-p

Vl-ends-with-directory-separatorp

Vl-dirlist-cache

Slow alist mapping directories names to their vl-dircaches.

Vl-dircache

Fast alist mapping file names to T.