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; Copyright (C) 2012 Centaur Technology
;
; Contact:
; Centaur Technology Formal Verification Group
; 7600-C N. Capital of Texas Highway, Suite 300, Austin, TX 78731, USA.
; http://www.centtech.com/
;
; License: (An MIT/X11-style license)
;
; Permission is hereby granted, free of charge, to any person obtaining a
; copy of this software and associated documentation files (the "Software"),
; to deal in the Software without restriction, including without limitation
; the rights to use, copy, modify, merge, publish, distribute, sublicense,
; and/or sell copies of the Software, and to permit persons to whom the
; Software is furnished to do so, subject to the following conditions:
;
; The above copyright notice and this permission notice shall be included in
; all copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
; DEALINGS IN THE SOFTWARE.
;
; Original author: Sol Swords <sswords@centtech.com>
(in-package "ACL2")
;; A set of utility functions for finding or collecting certain subterms of a
;; term/clause.
;; Basic: find one occurrence of a call of a particular function. Don't look
;; in lambda bodies.
(mutual-recursion
(defun find-call (fn x)
(declare (xargs :guard (and (symbolp fn)
(pseudo-termp x))))
(cond ((or (variablep x) (fquotep x)) nil)
((eq fn (car x)) x)
(t (find-call-lst fn (cdr x)))))
(defun find-call-lst (fn x)
(declare (xargs :guard (and (symbolp fn)
(pseudo-term-listp x))))
(if (endp x)
nil
(or (find-call fn (car x))
(find-call-lst fn (cdr x))))))
;; Find all occurrences of a call of a particular function.
(mutual-recursion
(defun find-calls (fn x)
(declare (xargs :guard (and (symbolp fn)
(pseudo-termp x))))
(cond ((or (variablep x) (fquotep x)) nil)
((eq fn (car x))
(cons x
(find-calls-lst fn (cdr x))))
(t (find-calls-lst fn (cdr x)))))
(defun find-calls-lst (fn x)
(declare (xargs :guard (and (symbolp fn)
(pseudo-term-listp x))))
(if (endp x)
nil
(append (find-calls fn (car x))
(find-calls-lst fn (cdr x))))))
;; Find all calls of several functions
(mutual-recursion
(defun find-calls-of-fns (fns x)
(declare (xargs :guard (and (symbol-listp fns)
(pseudo-termp x))))
(cond ((or (variablep x) (fquotep x)) nil)
((member (car x) fns)
(cons x
(find-calls-of-fns-lst fns (cdr x))))
(t (find-calls-of-fns-lst fns (cdr x)))))
(defun find-calls-of-fns-lst (fns x)
(declare (xargs :guard (and (symbol-listp fns)
(pseudo-term-listp x))))
(if (endp x)
nil
(append (find-calls-of-fns fns (car x))
(find-calls-of-fns-lst fns (cdr x))))))
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