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Oslib

Dirname!

Strip the non-directory suffix from a file name, or cause a hard error if there is any problem.

Signature
(dirname! path &key (state 'state)) → (mv dirname state)
Arguments: path — Guard (stringp path).
Returns: dirname — Type (stringp dirname).; state — Type (state-p1 state), given (force (state-p1 state)).

This is just a wrapper for dirname that causes an error on any failure.

Definitions and Theorems

Function: dirname!-fn

(defun dirname!-fn (path state)
  (declare (xargs :stobjs (state)))
  (declare (xargs :guard (stringp path)))
  (let ((__function__ 'dirname!))
    (declare (ignorable __function__))
    (b* (((mv err dirname state) (dirname path))
         ((when err)
          (raise "Dirname failed: ~@0" err)
          (mv "" state)))
      (mv dirname state))))

Theorem: stringp-of-dirname!.dirname

(defthm stringp-of-dirname!.dirname
  (b* (((mv ?dirname acl2::?state)
        (dirname!-fn path state)))
    (stringp dirname))
  :rule-classes :type-prescription)

Theorem: state-p1-of-dirname!.state

(defthm state-p1-of-dirname!.state
  (implies (force (state-p1 state))
           (b* (((mv ?dirname acl2::?state)
                 (dirname!-fn path state)))
             (state-p1 state)))
  :rule-classes :rewrite)