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• Vl-find-file

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.

Signature

(vl-extend-pathname dir filename) → dir/filename

Arguments

dir — Guard (stringp dir).

filename — Guard (stringp filename).

Returns

dir/filename — Type (stringp dir/filename).

Definitions and Theorems

Function: vl-extend-pathname

(defun vl-extend-pathname (dir filename)
  (declare (xargs :guard (and (stringp dir) (stringp filename))))
  (let ((__function__ 'vl-extend-pathname))
    (declare (ignorable __function__))
    (cat dir
         (if (vl-ends-with-directory-separatorp dir)
             ""
           (implode (list acl2::*directory-separator*)))
         filename)))

Theorem: stringp-of-vl-extend-pathname

(defthm stringp-of-vl-extend-pathname
  (b* ((dir/filename (vl-extend-pathname dir filename)))
    (stringp dir/filename))
  :rule-classes :type-prescription)

Theorem: vl-extend-pathname-of-str-fix-dir

(defthm vl-extend-pathname-of-str-fix-dir
  (equal (vl-extend-pathname (str-fix dir)
                             filename)
         (vl-extend-pathname dir filename)))

Theorem: vl-extend-pathname-streqv-congruence-on-dir

(defthm vl-extend-pathname-streqv-congruence-on-dir
  (implies (streqv dir dir-equiv)
           (equal (vl-extend-pathname dir filename)
                  (vl-extend-pathname dir-equiv filename)))
  :rule-classes :congruence)

Theorem: vl-extend-pathname-of-str-fix-filename

(defthm vl-extend-pathname-of-str-fix-filename
  (equal (vl-extend-pathname dir (str-fix filename))
         (vl-extend-pathname dir filename)))

Theorem: vl-extend-pathname-streqv-congruence-on-filename

(defthm vl-extend-pathname-streqv-congruence-on-filename
  (implies (streqv filename filename-equiv)
           (equal (vl-extend-pathname dir filename)
                  (vl-extend-pathname dir filename-equiv)))
  :rule-classes :congruence)