src/mrgmac.lisp

   1 ;;; -*-  Mode: Lisp; Package: Maxima; Syntax: Common-Lisp; Base: 10 -*- ;;;;
   2 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   3 ;;;     The data in this file contains enhancments.                    ;;;;;
   4 ;;;                                                                    ;;;;;
   5 ;;;  Copyright (c) 1984,1987 by William Schelter,University of Texas   ;;;;;
   6 ;;;     All rights reserved                                            ;;;;;
   7 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   8 ;;;     (c) Copyright 1980 Massachusetts Institute of Technology         ;;;
   9 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  10
  11 (in-package :maxima)
  12
  13 (macsyma-module mrgmac macro)
  14
  15 (defun zl-get (sym tag)
  16   (cond ((symbolp sym) (get sym tag))
  17         ((consp sym) (getf (cdr sym) tag))))
  18
  19 (defun define-macro (name lambda-exp)
  20   (cond ((symbolp lambda-exp)
  21          (setq lambda-exp (symbol-function lambda-exp))))
  22   (setf (macro-function name) lambda-exp))
  23
  24 (declare-top (special name bas selector))
  25
  26 (defvar *mobjects* nil)
  27
  28 (defprop mode (c-mode s-mode a-mode) mode)
  29
  30 (defmacro c-mode (&rest l)
  31   `(list ,@l))
  32
  33 (defmacro s-mode (&rest x)
  34   (push 's-mode x)
  35   (cond ((eq 'c (third x)) `(first ,(second x)))
  36         ((eq 'sel (third x)) `(second ,(second x)))
  37         ((eq 'push+sto (third x)) `(third ,(second x)))))
  38
  39 (defmacro a-mode (&rest x)
  40   (push 'a-mode x)
  41   (cond ((eq 'c (third x)) `(rplaca (second x) ,(fourth x)))
  42         ((eq 'sel (third x)) `(rplaca (cdr ,(second x)) ,(fourth x)))
  43         ((eq 'push+sto (third x)) `(rplaca (cddr ,(second x)) ,(fourth x)))))
  44
  45 (defmacro defmode (&rest x)
  46   (push 'defmode x)
  47   (let ((selector (member 'selector (cddddr x) :test #'eq)))
  48     (define-mode (second x) (fourth x))
  49     (mapc 'eval (cddddr x))
  50     `',(second x)))
  51
  52 (defun define-mode (name desc)
  53   (let ((c (intern (format nil "C-~A" name)))
  54         (s (intern (format nil "S-~A" name)))
  55         (a (intern (format nil "A-~A" name))))
  56     (define-macro c (defc desc))
  57     (define-macro s (defs desc))
  58     (define-macro a (defa desc))
  59     (putprop name (c-mode c s a) 'mode)))
  60
  61 (defun defc (desc)
  62   (let ((bas 'x))
  63     (coerce `(lambda (x &optional env)
  64               (declare (ignore env))
  65               ,(defc1 desc))
  66             'function)))
  67
  68 (defun defc1 (desc)
  69   (cond ((atom desc) (list 'quote desc))
  70         ((eq 'selector (car desc))
  71          (cond ((not (null (cdddr desc))) (list 'quote (fourth desc)))
  72                (t (setq bas (list 'cdr bas))
  73                   (list 'car bas))))
  74         ((eq (quote atom) (car desc))
  75          `(list 'c-atom '',(mapcar 'second (cdr desc)) (cons (quote list) (cdr x))))
  76         ((eq 'cons (car desc)) `(list 'cons ,(defc1 (second desc)) ,(defc1 (third desc))))
  77         ((eq (quote list) (car desc))
  78          (do ((l (cdr desc) (cdr l)) (nl))
  79              ((null l) `(list (quote list) ,@(nreverse nl)))
  80            (push (defc1 (car l)) nl)))
  81         ((eq 'struct (car desc)) (defc1 (cons (quote list) (cdr desc))))
  82         (t (list 'quote desc))))
  83
  84
  85 (defun defs (desc)
  86   (coerce `(lambda (x &optional env)
  87             (declare (ignore env))
  88             (cond ,@(nreverse (defs1 desc '(second x) nil))))
  89           'function ))
  90
  91 (defun defs1 (desc bas result)
  92   (cond ((atom desc) result)
  93         ((eq 'selector (car desc))
  94          (putprop (second desc)
  95               (cons (cons name (third desc)) (zl-get (second desc) 'modes))
  96               'modes)
  97          (putprop name
  98               (cons (cons (second desc) (third desc)) (zl-get name 'sels))
  99               'sels)
 100          (if selector (define-macro (second desc) 'selector))
 101          (cons `((eq ',(second desc) (third x)) ,bas) result))
 102         ((eq (quote atom) (car desc))
 103          (do ((l (cdr desc) (cdr l))) ((null l))
 104            (putprop (cadar l) (cons (cons name (caddar l))
 105                                 (zl-get (cadar l) 'modes)) 'modes)
 106            (putprop name (cons (cons (cadar l) (caddar l))
 107                            (zl-get name 'sels)) 'sels)
 108            (if selector (define-macro (cadar l) 'selector)))
 109          (cons `((member (third x) ',(mapcar 'second (cdr desc)) :test #'eq)
 110                  (list 'zl-get ,bas (list 'quote (third x))))
 111                result))
 112         ((eq 'cons (car desc))
 113          (setq result (defs1 (second desc) `(list 'car ,bas) result))
 114          (defs1 (third desc) `(list 'cdr ,bas) result))
 115         ((eq (quote list) (car desc))
 116          (do ((l (cdr desc) (cdr l))) ((null l))
 117            (setq result (defs1 (car l) `(list 'car ,bas) result)
 118                  bas `(list 'cdr ,bas)))
 119          result)
 120         ((eq 'struct (car desc)) (defs1 (cons (quote list) (cdr desc)) bas result))
 121         (t result)))
 122
 123 (defun defa (desc)
 124   (coerce `(lambda (x &optional env)
 125             (declare (ignore env))
 126             (cond ,@(nreverse (defa1 desc '(second x) nil nil))))
 127           'function))
 128
 129 (defun defa1 (desc bas cdr result)
 130   (cond ((atom desc) result)
 131         ((eq 'selector (car desc))
 132          (setq bas (cond ((not cdr) `(list 'car (list 'rplaca ,(third bas) (fourth x))))
 133                          (t `(list 'cdr (list 'rplacd ,(third bas) (fourth x))))))
 134          (cons `((eq ',(second desc) (third x)) ,bas) result))
 135         ((eq  (quote atom) (car desc))
 136          (list `(t (list 'cput (second x) (fourth x) (list 'quote (third x))))))
 137         ((eq 'cons (car desc))
 138          (setq result (defa1 (second desc) `(list 'car ,bas) nil result))
 139          (defa1 (third desc) `(list 'cdr ,bas) t result))
 140         ((eq (quote list) (car desc))
 141          (do ((l (cdr desc) (cdr l))) ((null l))
 142            (setq result (defa1 (car l) `(list 'car ,bas) nil result)
 143                  bas `(list 'cdr ,bas)))
 144          result)
 145         ((eq 'struct (car desc)) (defa1 (cons (quote list) (cdr desc)) bas cdr result))
 146         (t result)))
 147
 148
 149 (defun mode (x)
 150   (cdr (assoc x *mobjects* :test #'equal)))
 151
 152 (defmacro modedeclare (&rest l)
 153   `(modeclare-internal ',l))
 154
 155 (defun modedeclare-internal (x)
 156   (mapc #'(lambda (l)
 157             (mapc #'(lambda (v) (push (cons v (car l)) *mobjects*))
 158                   (cdr l)))
 159         x))
 160
 161 (defmacro sel (&rest x)
 162   (push 'sel x )
 163   (let ((s (fsel (mode (second x)) (cddr x))))
 164     (cond ((null s) (merror "SEL: ~a ~a" (second x) (cddr x)))
 165           (t (setq x (second x))
 166              (do ()
 167                  ((null (cdr s)) x)
 168                (setq x (cons (second (zl-get (car s) 'mode)) (rplaca s x))
 169                      s (cddr s))
 170                (rplacd (cddr x) nil))))))
 171
 172 (defun fsel (m sels) ;;This has a bug in it.
 173   (cond ((null sels) (list m))
 174         ((null m)
 175          (do ((l (zl-get (car sels) 'modes) (cdr l)))
 176              ((null l))
 177            (if (setq m (fsel (cdar l) (cdr sels)))
 178                (return (cons (caar l) (cons (car sels) m))))))
 179         ((let (dum)
 180            (if (setq dum (assoc (car sels) (zl-get m 'sels) :test #'eq))
 181                (cons m (cons (car sels) (fsel (cdr dum) (cdr sels)))))))
 182         (t (do ((l (zl-get m 'sels) (cdr l)) (dum))
 183                ((null l))
 184              (if (setq dum (fsel (cdar l) sels))
 185                  (return (cons m (cons (caar l) dum))))))))
 186
 187 (defun selector (x env)
 188   (declare (ignore env))
 189   (if (null (cddr x))
 190       `(sel ,(second x) ,(car x))
 191       `(push+sto (sel ,(second x) ,(car x)) ,(third x))))
 192
 193 (defmacro push+sto (&rest x)
 194   (push 'push+sto x )
 195   `(sto ,@(cdr x)))
 196
 197 (defmacro sto (&rest x)
 198   (push ' sto x )
 199   (do ((l (cdr x) (cddr l))
 200        (s)
 201        (nl))
 202       ((null l) `(progn ,@(nreverse nl)))
 203     (cond ((atom (car l))
 204            (push `(setq ,(first l) ,(second l)) nl))
 205           ((and (eq 'sel (caar l)) (setq s (fsel (mode (cadar l)) (cddar l))))
 206            (setq x (cadar l))
 207            (do ((l (cddr s) (cddr l)))
 208                ((null (cdr l)))
 209              (setq x (cons (second (zl-get (first l) 'mode)) (rplaca l x)))
 210              (rplacd (cddr x) nil))
 211            (push (list (third (zl-get (first s) 'mode)) x (second s) (second l)) nl))
 212           (t (merror "STO: ~a" (car l))))))
 213
 214 (defmacro cons-exp (op &rest args)
 215   `(simplify (list (list ,op) ,@args)))
 216
 217 ;; Local Modes:
 218 ;; Mode: LISP
 219 ;; Comment Col: 40
 220 ;; End: