module/system/vm/frame.scm

   1 ;;; Guile VM frame utilities
   2
   3 ;; Copyright (C) 2001 Free Software Foundation, Inc.
   4
   5 ;; This program is free software; you can redistribute it and/or modify
   6 ;; it under the terms of the GNU General Public License as published by
   7 ;; the Free Software Foundation; either version 2, or (at your option)
   8 ;; any later version.
   9 ;;
  10 ;; This program is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ;; GNU General Public License for more details.
  14 ;;
  15 ;; You should have received a copy of the GNU General Public License
  16 ;; along with this program; see the file COPYING.  If not, write to
  17 ;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 ;; Boston, MA 02111-1307, USA.
  19
  20 ;;; Code:
  21
  22 (define-module (system vm frame)
  23   :use-module (system vm core)
  24   :export (frame->call))
  25
  26 (define (frame->call frame)
  27   (let* ((prog (frame-program frame))
  28          (nargs (car (program-arity prog))))
  29     (do ((i 0 (1+ i))
  30          (l (vector->list (frame-variables frame)) (cdr l))
  31          (r '() (cons (car l) r)))
  32         ((= i nargs) (cons (program-name prog) (reverse! r))))))
  33
  34 (define (program-name x)
  35   (hash-fold (lambda (s v d) (if (eq? x (variable-ref v)) s d)) x
  36              (module-obarray (current-module))))