X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Flisp%2Fao_lisp_const.lisp;h=861a4fc80eed91314a76453f63528fef4d21340e;hb=12a1f6ad48f2b924f71239effeb90afca75a090f;hp=aa356d450aeeaa87d5860ec5948a37dec69cf77c;hpb=d2408e72d1e0d3459918601712b09860ab17e200;p=fw%2Faltos

diff --git a/src/lisp/ao_lisp_const.lisp b/src/lisp/ao_lisp_const.lisp
index aa356d45..861a4fc8 100644
--- a/src/lisp/ao_lisp_const.lisp
+++ b/src/lisp/ao_lisp_const.lisp
@@ -1 +1,530 @@
-cadr (lambda (l) (car (cdr l)))
+;
+; Copyright © 2016 Keith Packard <keithp@keithp.com>
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License as published by
+; the Free Software Foundation, either version 2 of the License, or
+; (at your option) any later version.
+;
+; This program is distributed in the hope that it will be useful, but
+; WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+; General Public License for more details.
+;
+; Lisp code placed in ROM
+
+					; return a list containing all of the arguments
+
+(set (quote list) (lexpr (l) l))
+
+					;
+					; Define a variable without returning the value
+					; Useful when defining functions to avoid
+					; having lots of output generated
+					;
+
+(set (quote define) (macro (name val rest)
+			(list
+			 'progn
+			 (list
+			  'set
+			  (list 'quote name)
+			  val)
+			 (list 'quote name)
+			 )
+			)
+     )
+
+					;
+					; A slightly more convenient form
+					; for defining lambdas.
+					;
+					; (defun <name> (<params>) s-exprs)
+					;
+
+(define defun (macro (name args exprs)
+		  (list
+		   define
+		   name
+		   (cons 'lambda (cons args exprs))
+		   )
+		  )
+     )
+
+					; basic list accessors
+
+
+(defun caar (l) (car (car l)))
+
+(defun cadr (l) (car (cdr l)))
+
+(defun caddr (l) (car (cdr (cdr l))))
+
+(define list-tail (lambda (x k)
+		    (if (zero? k)
+			x
+		      (list-tail (cdr x (- k 1)))
+		      )
+		    )
+  )
+
+(define list-ref (lambda (x k)
+		   (car (list-tail x k))
+		   )
+  )
+
+					; simple math operators
+
+(defun 1+ (x) (+ x 1))
+(defun 1- (x) (- x 1))
+
+(define zero? (macro (value rest)
+		     (list
+		      eq?
+		      value
+		      0)
+		     )
+  )
+
+(zero? 1)
+(zero? 0)
+(zero? "hello")
+
+(define positive? (macro (value rest)
+			 (list
+			  >
+			  value
+			  0)
+			 )
+  )
+
+(positive? 12)
+(positive? -12)
+
+(define negative? (macro (value rest)
+			 (list
+			  <
+			  value
+			  0)
+			 )
+  )
+
+(negative? 12)
+(negative? -12)
+
+(defun abs (x) (cond ((>= x 0) x)
+		     (else (- x)))
+       )
+
+(abs 12)
+(abs -12)
+
+(define max (lexpr (first rest)
+		   (while (not (null? rest))
+		     (cond ((< first (car rest))
+			    (set! first (car rest)))
+			   )
+		     (set! rest (cdr rest))
+		     )
+		   first)
+  )
+
+(max 1 2 3)
+(max 3 2 1)
+
+(define min (lexpr (first rest)
+		   (while (not (null? rest))
+		     (cond ((> first (car rest))
+			    (set! first (car rest)))
+			   )
+		     (set! rest (cdr rest))
+		     )
+		   first)
+  )
+
+(min 1 2 3)
+(min 3 2 1)
+
+(defun even? (x) (zero? (% x 2)))
+
+(even? 2)
+(even? -2)
+(even? 3)
+(even? -1)
+
+(defun odd? (x) (not (even? x)))
+
+(odd? 2)
+(odd? -2)
+(odd? 3)
+(odd? -1)
+
+(define exact? number?)
+(defun inexact? (x) #f)
+
+					; (if <condition> <if-true>)
+					; (if <condition> <if-true> <if-false)
+
+(define if (macro (test args)
+	       (cond ((null? (cdr args))
+		      (list
+		       cond
+		       (list test (car args)))
+		      )
+		     (else
+		      (list
+		       cond
+		       (list test (car args))
+		       (list 'else (cadr args))
+		       )
+		      )
+		     )
+	       )
+     )
+
+(if (> 3 2) 'yes)
+(if (> 3 2) 'yes 'no)
+(if (> 2 3) 'no 'yes)
+(if (> 2 3) 'no)
+
+					; define a set of local
+					; variables and then evaluate
+					; a list of sexprs
+					;
+					; (let (var-defines) sexprs)
+					;
+					; where var-defines are either
+					;
+					; (name value)
+					;
+					; or
+					;
+					; (name)
+					;
+					; e.g.
+					;
+					; (let ((x 1) (y)) (set! y (+ x 1)) y)
+
+(define let (macro (vars exprs)
+		((lambda (make-names make-exprs make-nils)
+
+					;
+					; make the list of names in the let
+					;
+
+		   (set! make-names (lambda (vars)
+				      (cond ((not (null? vars))
+					     (cons (car (car vars))
+						   (make-names (cdr vars))))
+					    )
+				      )
+			 )
+
+					; the set of expressions is
+					; the list of set expressions
+					; pre-pended to the
+					; expressions to evaluate
+
+		   (set! make-exprs (lambda (vars exprs)
+				      (cond ((not (null? vars))
+					     (cons
+					      (list set
+						    (list quote
+							  (car (car vars))
+							  )
+						    (cond ((null? (cdr (car vars))) ())
+							  (else (cadr (car vars))))
+						    )
+					      (make-exprs (cdr vars) exprs)
+					      )
+					     )
+					    (exprs)
+					    )
+				      )
+			 )
+
+					; the parameters to the lambda is a list
+					; of nils of the right length
+
+		   (set! make-nils (lambda (vars)
+				     (cond ((not (null? vars)) (cons () (make-nils (cdr vars))))
+					   )
+				     )
+			 )
+					; prepend the set operations
+					; to the expressions
+
+		   (set! exprs (make-exprs vars exprs))
+
+					; build the lambda.
+
+		   (cons (cons 'lambda (cons (make-names vars) exprs))
+			 (make-nils vars)
+			 )
+		   )
+		 ()
+		 ()
+		 ()
+		 )
+		)
+     )
+
+(let ((x 1)) x)
+
+(define let* let)
+					; boolean operators
+
+(define or (lexpr (l)
+	       (let ((ret #f))
+		 (while (not (null? l))
+		   (cond ((car l) (set! ret #t) (set! l ()))
+			 ((set! l (cdr l)))))
+		 ret
+		 )
+	       )
+     )
+
+					; execute to resolve macros
+
+(or #f #t)
+
+(define and (lexpr (l)
+	       (let ((ret #t))
+		 (while (not (null? l))
+		   (cond ((car l)
+			  (set! l (cdr l)))
+			 (#t
+			  (set! ret #f)
+			  (set! l ()))
+			 )
+		   )
+		 ret
+		 )
+	       )
+     )
+
+					; execute to resolve macros
+
+(and #t #f)
+
+
+(define append (lexpr (args)
+		      (let ((append-list (lambda (a b)
+					   (cond ((null? a) b)
+						 (else (cons (car a) (append-list (cdr a) b)))
+						 )
+					   )
+					 )
+			    (append-lists (lambda (lists)
+					    (cond ((null? lists) lists)
+						  ((null? (cdr lists)) (car lists))
+						  (else (append-list (car lists) (append-lists (cdr lists))))
+						  )
+					    )
+					  )
+			    )
+			(append-lists args)
+			)
+		      )
+  )
+
+(append '(a b c) '(d e f) '(g h i))
+
+(defun reverse (list)
+  (let ((result ()))
+    (while (not (null? list))
+      (set! result (cons (car list) result))
+      (set! list (cdr list))
+      )
+    result)
+  )
+
+(reverse '(1 2 3))
+
+(define list-tail
+  (lambda (x k)
+    (if (zero? k)
+	x
+      (list-tail (cdr x) (- k 1)))))
+
+(list-tail '(1 2 3) 2)
+
+(defun list-ref (x k) (car (list-tail x k)))
+
+(list-ref '(1 2 3) 2)
+
+    
+					; recursive equality
+
+(defun equal? (a b)
+  (cond ((eq? a b) #t)
+	((and (pair? a) (pair? b))
+	 (and (equal? (car a) (car b))
+	      (equal? (cdr a) (cdr b)))
+	 )
+	(else #f)
+	)
+  )
+
+(equal? '(a b c) '(a b c))
+(equal? '(a b c) '(a b b))
+
+(defun _member (obj list test?)
+  (if (null? list)
+      #f
+    (if (test? obj (car list))
+	list
+      (memq obj (cdr list)))))
+
+(defun memq (obj list) (_member obj list eq?))
+
+(memq 2 '(1 2 3))
+
+(memq 4 '(1 2 3))
+
+(defun memv (obj list) (_member obj list eqv?))
+
+(memv 2 '(1 2 3))
+
+(memv 4 '(1 2 3))
+
+(defun member (obj list) (_member obj list equal?))
+
+(member '(2) '((1) (2) (3)))
+
+(member '(4) '((1) (2) (3)))
+
+(defun _assoc (obj list test?)
+  (if (null? list)
+      #f
+    (if (test? obj (caar list))
+	(car list)
+      (_assoc obj (cdr list) test?)
+      )
+    )
+  )
+
+(defun assq (obj list) (_assoc obj list eq?))
+(defun assv (obj list) (_assoc obj list eqv?))
+(defun assoc (obj list) (_assoc obj list equal?))
+
+(assq 'a '((a 1) (b 2) (c 3)))
+(assv 'b '((a 1) (b 2) (c 3)))
+(assoc '(c) '((a 1) (b 2) ((c) 3)))
+
+(define char? integer?)
+
+(char? #\q)
+(char? "h")
+
+(defun char-upper-case? (c) (<= #\A c #\Z))
+
+(char-upper-case? #\a)
+(char-upper-case? #\B)
+(char-upper-case? #\0)
+(char-upper-case? #\space)
+
+(defun char-lower-case? (c) (<= #\a c #\a))
+
+(char-lower-case? #\a)
+(char-lower-case? #\B)
+(char-lower-case? #\0)
+(char-lower-case? #\space)
+
+(defun char-alphabetic? (c) (or (char-upper-case? c) (char-lower-case? c)))
+
+(char-alphabetic? #\a)
+(char-alphabetic? #\B)
+(char-alphabetic? #\0)
+(char-alphabetic? #\space)
+
+(defun char-numeric? (c) (<= #\0 c #\9))
+
+(char-numeric? #\a)
+(char-numeric? #\B)
+(char-numeric? #\0)
+(char-numeric? #\space)
+
+(defun char-whitespace? (c) (or (<= #\tab c #\return) (= #\space c)))
+
+(char-whitespace? #\a)
+(char-whitespace? #\B)
+(char-whitespace? #\0)
+(char-whitespace? #\space)
+
+(defun char->integer (c) c)
+(defun integer->char (c) char-integer)
+
+(defun char-upcase (c) (if (char-lower-case? c) (+ c (- #\A #\a)) c))
+
+(char-upcase #\a)
+(char-upcase #\B)
+(char-upcase #\0)
+(char-upcase #\space)
+
+(defun char-downcase (c) (if (char-upper-case? c) (+ c (- #\a #\A)) c))
+
+(char-downcase #\a)
+(char-downcase #\B)
+(char-downcase #\0)
+(char-downcase #\space)
+
+(define string (lexpr (chars) (list->string chars)))
+
+(display "apply\n")
+(apply cons '(a b))
+
+(define map (lexpr (proc lists)
+		   (let ((args (lambda (lists)
+				 (if (null? lists) ()
+				   (cons (caar lists) (args (cdr lists))))))
+			 (next (lambda (lists)
+				 (if (null? lists) ()
+				   (cons (cdr (car lists)) (next (cdr lists))))))
+			 (domap (lambda (lists)
+				  (if (null? (car lists)) ()
+				    (cons (apply proc (args lists)) (domap (next lists)))
+					)))
+			 )
+		     (domap lists))))
+
+(map cadr '((a b) (d e) (g h)))
+
+(define for-each (lexpr (proc lists)
+			(apply map proc lists)
+			#t))
+
+(for-each display '("hello" " " "world" "\n"))
+
+(define -string-ml (lambda (strings)
+			     (if (null? strings) ()
+			       (cons (string->list (car strings)) (-string-ml (cdr strings))))))
+
+(define string-map (lexpr (proc strings)
+			  (list->string (apply map proc (-string-ml strings))))))
+
+(string-map 1+ "HAL")
+
+(define string-for-each (lexpr (proc strings)
+			       (apply for-each proc (-string-ml strings))))
+
+(string-for-each write-char "IBM\n")
+
+(define newline (lambda () (write-char #\newline)))
+
+(newline)
+
+(call-with-current-continuation
+ (lambda (exit)
+   (for-each (lambda (x)
+	       (write "test" x)
+	       (if (negative? x)
+		   (exit x)))
+	     '(54 0 37 -3 245 19))
+   #t))
+
+;(define number->string (lexpr (arg opt)
+;			      (let ((base (if (null? opt) 10 (car opt)))
+					;
+;
+