mirror of
https://github.com/edeproject/ede.git
synced 2023-08-10 21:13:03 +03:00
603 lines
19 KiB
Scheme
603 lines
19 KiB
Scheme
;; vim:set ft=scheme:
|
|
;; Initialization file for TinySCHEME 1.39
|
|
|
|
; Per R5RS, up to four deep compositions should be defined
|
|
(define (caar x) (car (car x)))
|
|
(define (cadr x) (car (cdr x)))
|
|
(define (cdar x) (cdr (car x)))
|
|
(define (cddr x) (cdr (cdr x)))
|
|
(define (caaar x) (car (car (car x))))
|
|
(define (caadr x) (car (car (cdr x))))
|
|
(define (cadar x) (car (cdr (car x))))
|
|
(define (caddr x) (car (cdr (cdr x))))
|
|
(define (cdaar x) (cdr (car (car x))))
|
|
(define (cdadr x) (cdr (car (cdr x))))
|
|
(define (cddar x) (cdr (cdr (car x))))
|
|
(define (cdddr x) (cdr (cdr (cdr x))))
|
|
(define (caaaar x) (car (car (car (car x)))))
|
|
(define (caaadr x) (car (car (car (cdr x)))))
|
|
(define (caadar x) (car (car (cdr (car x)))))
|
|
(define (caaddr x) (car (car (cdr (cdr x)))))
|
|
(define (cadaar x) (car (cdr (car (car x)))))
|
|
(define (cadadr x) (car (cdr (car (cdr x)))))
|
|
(define (caddar x) (car (cdr (cdr (car x)))))
|
|
(define (cadddr x) (car (cdr (cdr (cdr x)))))
|
|
(define (cdaaar x) (cdr (car (car (car x)))))
|
|
(define (cdaadr x) (cdr (car (car (cdr x)))))
|
|
(define (cdadar x) (cdr (car (cdr (car x)))))
|
|
(define (cdaddr x) (cdr (car (cdr (cdr x)))))
|
|
(define (cddaar x) (cdr (cdr (car (car x)))))
|
|
(define (cddadr x) (cdr (cdr (car (cdr x)))))
|
|
(define (cdddar x) (cdr (cdr (cdr (car x)))))
|
|
(define (cddddr x) (cdr (cdr (cdr (cdr x)))))
|
|
|
|
(macro (unless form)
|
|
`(if (not ,(cadr form)) (begin ,@(cddr form))))
|
|
|
|
(macro (when form)
|
|
`(if ,(cadr form) (begin ,@(cddr form))))
|
|
|
|
; DEFINE-MACRO Contributed by Andy Gaynor
|
|
(macro (define-macro dform)
|
|
(if (symbol? (cadr dform))
|
|
`(macro ,@(cdr dform))
|
|
(let ((form (gensym)))
|
|
`(macro (,(caadr dform) ,form)
|
|
(apply (lambda ,(cdadr dform) ,@(cddr dform)) (cdr ,form))))))
|
|
|
|
; Utilities for math. Notice that inexact->exact is primitive,
|
|
; but exact->inexact is not.
|
|
(define exact? integer?)
|
|
(define (inexact? x) (and (real? x) (not (integer? x))))
|
|
(define (even? n) (= (remainder n 2) 0))
|
|
(define (odd? n) (not (= (remainder n 2) 0)))
|
|
(define (zero? n) (= n 0))
|
|
(define (positive? n) (> n 0))
|
|
(define (negative? n) (< n 0))
|
|
(define complex? number?)
|
|
(define rational? real?)
|
|
(define (abs n) (if (>= n 0) n (- n)))
|
|
(define (exact->inexact n) (* n 1.0))
|
|
(define (<> n1 n2) (not (= n1 n2)))
|
|
(define (max . lst)
|
|
(foldr (lambda (a b) (if (> a b) a b)) (car lst) (cdr lst)))
|
|
(define (min . lst)
|
|
(foldr (lambda (a b) (if (< a b) a b)) (car lst) (cdr lst)))
|
|
(define (succ x) (+ x 1))
|
|
(define (pred x) (- x 1))
|
|
(define (gcd a b)
|
|
(let ((aa (abs a))
|
|
(bb (abs b)))
|
|
(if (= bb 0)
|
|
aa
|
|
(gcd bb (remainder aa bb)))))
|
|
(define (lcm a b)
|
|
(if (or (= a 0) (= b 0))
|
|
0
|
|
(abs (* (quotient a (gcd a b)) b))))
|
|
|
|
(define call/cc call-with-current-continuation)
|
|
|
|
(define (string . charlist)
|
|
(list->string charlist))
|
|
|
|
(define (list->string charlist)
|
|
(let* ((len (length charlist))
|
|
(newstr (make-string len))
|
|
(fill-string!
|
|
(lambda (str i len charlist)
|
|
(if (= i len)
|
|
str
|
|
(begin (string-set! str i (car charlist))
|
|
(fill-string! str (+ i 1) len (cdr charlist)))))))
|
|
(fill-string! newstr 0 len charlist)))
|
|
|
|
(define (string-fill! s e)
|
|
(let ((n (string-length s)))
|
|
(let loop ((i 0))
|
|
(if (= i n)
|
|
s
|
|
(begin (string-set! s i e) (loop (succ i)))))))
|
|
|
|
(define (string->list s)
|
|
(let loop ((n (pred (string-length s))) (l '()))
|
|
(if (= n -1)
|
|
l
|
|
(loop (pred n) (cons (string-ref s n) l)))))
|
|
|
|
(define (string-copy str)
|
|
(string-append str))
|
|
|
|
(define (string->anyatom str pred)
|
|
(let* ((a (string->atom str)))
|
|
(if (pred a) a
|
|
(error "string->xxx: not a xxx" a))))
|
|
|
|
(define (string->number str) (string->anyatom str number?))
|
|
|
|
(define (anyatom->string n pred)
|
|
(if (pred n)
|
|
(atom->string n)
|
|
(error "xxx->string: not a xxx" n)))
|
|
|
|
|
|
(define (number->string n) (anyatom->string n number?))
|
|
|
|
(define (char-cmp? cmp a b)
|
|
(cmp (char->integer a) (char->integer b)))
|
|
(define (char-ci-cmp? cmp a b)
|
|
(cmp (char->integer (char-downcase a)) (char->integer (char-downcase b))))
|
|
|
|
(define (char=? a b) (char-cmp? = a b))
|
|
(define (char<? a b) (char-cmp? < a b))
|
|
(define (char>? a b) (char-cmp? > a b))
|
|
(define (char<=? a b) (char-cmp? <= a b))
|
|
(define (char>=? a b) (char-cmp? >= a b))
|
|
|
|
(define (char-ci=? a b) (char-ci-cmp? = a b))
|
|
(define (char-ci<? a b) (char-ci-cmp? < a b))
|
|
(define (char-ci>? a b) (char-ci-cmp? > a b))
|
|
(define (char-ci<=? a b) (char-ci-cmp? <= a b))
|
|
(define (char-ci>=? a b) (char-ci-cmp? >= a b))
|
|
|
|
; Note the trick of returning (cmp x y)
|
|
(define (string-cmp? chcmp cmp a b)
|
|
(let ((na (string-length a)) (nb (string-length b)))
|
|
(let loop ((i 0))
|
|
(cond
|
|
((= i na)
|
|
(if (= i nb) (cmp 0 0) (cmp 0 1)))
|
|
((= i nb)
|
|
(cmp 1 0))
|
|
((chcmp = (string-ref a i) (string-ref b i))
|
|
(loop (succ i)))
|
|
(else
|
|
(chcmp cmp (string-ref a i) (string-ref b i)))))))
|
|
|
|
|
|
(define (string=? a b) (string-cmp? char-cmp? = a b))
|
|
(define (string<? a b) (string-cmp? char-cmp? < a b))
|
|
(define (string>? a b) (string-cmp? char-cmp? > a b))
|
|
(define (string<=? a b) (string-cmp? char-cmp? <= a b))
|
|
(define (string>=? a b) (string-cmp? char-cmp? >= a b))
|
|
|
|
(define (string-ci=? a b) (string-cmp? char-ci-cmp? = a b))
|
|
(define (string-ci<? a b) (string-cmp? char-ci-cmp? < a b))
|
|
(define (string-ci>? a b) (string-cmp? char-ci-cmp? > a b))
|
|
(define (string-ci<=? a b) (string-cmp? char-ci-cmp? <= a b))
|
|
(define (string-ci>=? a b) (string-cmp? char-ci-cmp? >= a b))
|
|
|
|
(define (list . x) x)
|
|
|
|
(define (foldr f x lst)
|
|
(if (null? lst)
|
|
x
|
|
(foldr f (f x (car lst)) (cdr lst))))
|
|
|
|
(define (unzip1-with-cdr . lists)
|
|
(unzip1-with-cdr-iterative lists '() '()))
|
|
|
|
(define (unzip1-with-cdr-iterative lists cars cdrs)
|
|
(if (null? lists)
|
|
(cons cars cdrs)
|
|
(let ((car1 (caar lists))
|
|
(cdr1 (cdar lists)))
|
|
(unzip1-with-cdr-iterative
|
|
(cdr lists)
|
|
(append cars (list car1))
|
|
(append cdrs (list cdr1))))))
|
|
|
|
;;
|
|
;; Original implementation that pretty sucks
|
|
;;
|
|
;(define (map proc . lists)
|
|
; (if (null? lists)
|
|
; (apply proc)
|
|
; (if (null? (car lists))
|
|
; '()
|
|
; (let* ((unz (apply unzip1-with-cdr lists))
|
|
; (cars (car unz))
|
|
; (cdrs (cdr unz)))
|
|
; (cons (apply proc cars) (apply map (cons proc cdrs)))))))
|
|
|
|
(define (map1 proc lst)
|
|
(if (null? lst)
|
|
lst
|
|
(let loop ((lst lst)
|
|
(nls '()))
|
|
(if (null? lst)
|
|
(reverse nls)
|
|
(loop (cdr lst)
|
|
(cons (proc (car lst)) nls))))))
|
|
|
|
(define (map proc lst . more)
|
|
(if (null? more)
|
|
(map1 proc lst)
|
|
(let map-more ((lst lst)
|
|
(more more))
|
|
(if (null? lst)
|
|
lst
|
|
(cons (apply proc (car lst) (map car more))
|
|
(map-more (cdr lst)
|
|
(map cdr more)))))))
|
|
|
|
;;
|
|
;; Original implementation that pretty sucks
|
|
;; Althought it behaves as given in Dybvig's book, PLT and chicken
|
|
;; versions does not allow multiple list arguments
|
|
;;
|
|
;(define (for-each proc . lists)
|
|
; (if (null? lists)
|
|
; (apply proc)
|
|
; (if (null? (car lists))
|
|
; #t
|
|
; (let* ((unz (apply unzip1-with-cdr lists))
|
|
; (cars (car unz))
|
|
; (cdrs (cdr unz)))
|
|
; (apply proc cars) (apply map (cons proc cdrs))))))
|
|
|
|
(define (for-each proc lst)
|
|
(if (not (null? lst))
|
|
(begin
|
|
(proc (car lst))
|
|
(for-each proc (cdr lst)))))
|
|
|
|
(define (list-tail x k)
|
|
(if (zero? k)
|
|
x
|
|
(list-tail (cdr x) (- k 1))))
|
|
|
|
(define (list-ref x k)
|
|
(car (list-tail x k)))
|
|
|
|
(define (last-pair x)
|
|
(if (pair? (cdr x))
|
|
(last-pair (cdr x))
|
|
x))
|
|
|
|
(define (head stream) (car stream))
|
|
|
|
(define (tail stream) (force (cdr stream)))
|
|
|
|
(define (vector-equal? x y)
|
|
(and (vector? x) (vector? y) (= (vector-length x) (vector-length y))
|
|
(let ((n (vector-length x)))
|
|
(let loop ((i 0))
|
|
(if (= i n)
|
|
#t
|
|
(and (equal? (vector-ref x i) (vector-ref y i))
|
|
(loop (succ i))))))))
|
|
|
|
(define (list->vector x)
|
|
(apply vector x))
|
|
|
|
(define (vector-fill! v e)
|
|
(let ((n (vector-length v)))
|
|
(let loop ((i 0))
|
|
(if (= i n)
|
|
v
|
|
(begin (vector-set! v i e) (loop (succ i)))))))
|
|
|
|
(define (vector->list v)
|
|
(let loop ((n (pred (vector-length v))) (l '()))
|
|
(if (= n -1)
|
|
l
|
|
(loop (pred n) (cons (vector-ref v n) l)))))
|
|
|
|
;; The following quasiquote macro is due to Eric S. Tiedemann.
|
|
;; Copyright 1988 by Eric S. Tiedemann; all rights reserved.
|
|
;;
|
|
;; Subsequently modified to handle vectors: D. Souflis
|
|
|
|
(macro
|
|
quasiquote
|
|
(lambda (l)
|
|
(define (mcons f l r)
|
|
(if (and (pair? r)
|
|
(eq? (car r) 'quote)
|
|
(eq? (car (cdr r)) (cdr f))
|
|
(pair? l)
|
|
(eq? (car l) 'quote)
|
|
(eq? (car (cdr l)) (car f)))
|
|
(if (or (procedure? f) (number? f) (string? f))
|
|
f
|
|
(list 'quote f))
|
|
(if (eqv? l vector)
|
|
(apply l (eval r))
|
|
(list 'cons l r)
|
|
)))
|
|
(define (mappend f l r)
|
|
(if (or (null? (cdr f))
|
|
(and (pair? r)
|
|
(eq? (car r) 'quote)
|
|
(eq? (car (cdr r)) '())))
|
|
l
|
|
(list 'append l r)))
|
|
(define (foo level form)
|
|
(cond ((not (pair? form))
|
|
(if (or (procedure? form) (number? form) (string? form))
|
|
form
|
|
(list 'quote form))
|
|
)
|
|
((eq? 'quasiquote (car form))
|
|
(mcons form ''quasiquote (foo (+ level 1) (cdr form))))
|
|
(#t (if (zero? level)
|
|
(cond ((eq? (car form) 'unquote) (car (cdr form)))
|
|
((eq? (car form) 'unquote-splicing)
|
|
(error "Unquote-splicing wasn't in a list:"
|
|
form))
|
|
((and (pair? (car form))
|
|
(eq? (car (car form)) 'unquote-splicing))
|
|
(mappend form (car (cdr (car form)))
|
|
(foo level (cdr form))))
|
|
(#t (mcons form (foo level (car form))
|
|
(foo level (cdr form)))))
|
|
(cond ((eq? (car form) 'unquote)
|
|
(mcons form ''unquote (foo (- level 1)
|
|
(cdr form))))
|
|
((eq? (car form) 'unquote-splicing)
|
|
(mcons form ''unquote-splicing
|
|
(foo (- level 1) (cdr form))))
|
|
(#t (mcons form (foo level (car form))
|
|
(foo level (cdr form)))))))))
|
|
(foo 0 (car (cdr l)))))
|
|
|
|
|
|
;;;;; atom? and equal? written by a.k
|
|
|
|
;;;; atom?
|
|
(define (atom? x)
|
|
(not (pair? x)))
|
|
|
|
;;;; equal?
|
|
(define (equal? x y)
|
|
(cond
|
|
((pair? x)
|
|
(and (pair? y)
|
|
(equal? (car x) (car y))
|
|
(equal? (cdr x) (cdr y))))
|
|
((vector? x)
|
|
(and (vector? y) (vector-equal? x y)))
|
|
((string? x)
|
|
(and (string? y) (string=? x y)))
|
|
(else (eqv? x y))))
|
|
|
|
;;;; (do ((var init inc) ...) (endtest result ...) body ...)
|
|
;;
|
|
(macro do
|
|
(lambda (do-macro)
|
|
(apply (lambda (do vars endtest . body)
|
|
(let ((do-loop (gensym)))
|
|
`(letrec ((,do-loop
|
|
(lambda ,(map (lambda (x)
|
|
(if (pair? x) (car x) x))
|
|
`,vars)
|
|
(if ,(car endtest)
|
|
(begin ,@(cdr endtest))
|
|
(begin
|
|
,@body
|
|
(,do-loop
|
|
,@(map (lambda (x)
|
|
(cond
|
|
((not (pair? x)) x)
|
|
((< (length x) 3) (car x))
|
|
(else (car (cdr (cdr x))))))
|
|
`,vars)))))))
|
|
(,do-loop
|
|
,@(map (lambda (x)
|
|
(if (and (pair? x) (cdr x))
|
|
(car (cdr x))
|
|
'()))
|
|
`,vars)))))
|
|
do-macro)))
|
|
|
|
;;;; generic-member
|
|
(define (generic-member cmp obj lst)
|
|
(cond
|
|
((null? lst) #f)
|
|
((cmp obj (car lst)) lst)
|
|
(else (generic-member cmp obj (cdr lst)))))
|
|
|
|
(define (memq obj lst)
|
|
(generic-member eq? obj lst))
|
|
(define (memv obj lst)
|
|
(generic-member eqv? obj lst))
|
|
(define (member obj lst)
|
|
(generic-member equal? obj lst))
|
|
|
|
;;;; generic-assoc
|
|
(define (generic-assoc cmp obj alst)
|
|
(cond
|
|
((null? alst) #f)
|
|
((cmp obj (caar alst)) (car alst))
|
|
(else (generic-assoc cmp obj (cdr alst)))))
|
|
|
|
(define (assq obj alst)
|
|
(generic-assoc eq? obj alst))
|
|
(define (assv obj alst)
|
|
(generic-assoc eqv? obj alst))
|
|
(define (assoc obj alst)
|
|
(generic-assoc equal? obj alst))
|
|
|
|
(define (acons x y z) (cons (cons x y) z))
|
|
|
|
;;;; Utility to ease macro creation
|
|
(define (macro-expand form)
|
|
((eval (get-closure-code (eval (car form)))) form))
|
|
|
|
;;;; Handy for imperative programs
|
|
;;;; Used as: (define-with-return (foo x y) .... (return z) ...)
|
|
(macro (define-with-return form)
|
|
`(define ,(cadr form)
|
|
(call/cc (lambda (return) ,@(cddr form)))))
|
|
|
|
;;;; Simple exception handling
|
|
;
|
|
; Exceptions are caught as follows:
|
|
;
|
|
; (catch (do-something to-recover and-return meaningful-value)
|
|
; (if-something goes-wrong)
|
|
; (with-these calls))
|
|
;
|
|
; "Catch" establishes a scope spanning multiple call-frames
|
|
; until another "catch" is encountered.
|
|
;
|
|
; Exceptions are thrown with:
|
|
;
|
|
; (throw "message")
|
|
;
|
|
; If used outside a (catch ...), reverts to (error "message)
|
|
|
|
(define *handlers* (list))
|
|
|
|
(define (push-handler proc)
|
|
(set! *handlers* (cons proc *handlers*)))
|
|
|
|
(define (pop-handler)
|
|
(let ((h (car *handlers*)))
|
|
(set! *handlers* (cdr *handlers*))
|
|
h))
|
|
|
|
(define (more-handlers?)
|
|
(pair? *handlers*))
|
|
|
|
(define (throw . x)
|
|
(if (more-handlers?)
|
|
(apply (pop-handler))
|
|
(apply error x)))
|
|
|
|
(macro (catch form)
|
|
(let ((label (gensym)))
|
|
`(call/cc (lambda (exit)
|
|
(push-handler (lambda () (exit ,(cadr form))))
|
|
(let ((,label (begin ,@(cddr form))))
|
|
(pop-handler)
|
|
,label)))))
|
|
|
|
(define *error-hook* throw)
|
|
|
|
|
|
;;;;; Definition of MAKE-ENVIRONMENT, to be used with two-argument EVAL
|
|
|
|
(macro (make-environment form)
|
|
`(apply (lambda ()
|
|
,@(cdr form)
|
|
(current-environment))))
|
|
|
|
(define-macro (eval-polymorphic x . envl)
|
|
(display envl)
|
|
(let* ((env (if (null? envl) (current-environment) (eval (car envl))))
|
|
(xval (eval x env)))
|
|
(if (closure? xval)
|
|
(make-closure (get-closure-code xval) env)
|
|
xval)))
|
|
|
|
; Redefine this if you install another package infrastructure
|
|
; Also redefine 'package'
|
|
(define *colon-hook* eval)
|
|
|
|
;;;;; I/O
|
|
|
|
(define (input-output-port? p)
|
|
(and (input-port? p) (output-port? p)))
|
|
|
|
(define (close-port p)
|
|
(cond
|
|
((input-output-port? p) (close-input-port (close-output-port p)))
|
|
((input-port? p) (close-input-port p))
|
|
((output-port? p) (close-output-port p))
|
|
(else (throw "Not a port" p))))
|
|
|
|
(define (call-with-input-file s p)
|
|
(let ((inport (open-input-file s)))
|
|
(if (eq? inport #f)
|
|
#f
|
|
(let ((res (p inport)))
|
|
(close-input-port inport)
|
|
res))))
|
|
|
|
(define (call-with-output-file s p)
|
|
(let ((outport (open-output-file s)))
|
|
(if (eq? outport #f)
|
|
#f
|
|
(let ((res (p outport)))
|
|
(close-output-port outport)
|
|
res))))
|
|
|
|
(define (with-input-from-file s p)
|
|
(let ((inport (open-input-file s)))
|
|
(if (eq? inport #f)
|
|
#f
|
|
(let ((prev-inport (current-input-port)))
|
|
(set-input-port inport)
|
|
(let ((res (p)))
|
|
(close-input-port inport)
|
|
(set-input-port prev-inport)
|
|
res)))))
|
|
|
|
(define (with-output-to-file s p)
|
|
(let ((outport (open-output-file s)))
|
|
(if (eq? outport #f)
|
|
#f
|
|
(let ((prev-outport (current-output-port)))
|
|
(set-output-port outport)
|
|
(let ((res (p)))
|
|
(close-output-port outport)
|
|
(set-output-port prev-outport)
|
|
res)))))
|
|
|
|
(define (with-input-output-from-to-files si so p)
|
|
(let ((inport (open-input-file si))
|
|
(outport (open-input-file so)))
|
|
(if (not (and inport outport))
|
|
(begin
|
|
(close-input-port inport)
|
|
(close-output-port outport)
|
|
#f)
|
|
(let ((prev-inport (current-input-port))
|
|
(prev-outport (current-output-port)))
|
|
(set-input-port inport)
|
|
(set-output-port outport)
|
|
(let ((res (p)))
|
|
(close-input-port inport)
|
|
(close-output-port outport)
|
|
(set-input-port prev-inport)
|
|
(set-output-port prev-outport)
|
|
res)))))
|
|
|
|
;; SRFI-0
|
|
;; COND-EXPAND
|
|
;; Implemented as a macro
|
|
(define *features* '(srfi-0))
|
|
|
|
(define-macro (cond-expand . cond-action-list)
|
|
(cond-expand-runtime cond-action-list))
|
|
|
|
(define (cond-expand-runtime cond-action-list)
|
|
(if (null? cond-action-list)
|
|
#t
|
|
(if (cond-eval (caar cond-action-list))
|
|
`(begin ,@(cdar cond-action-list))
|
|
(cond-expand-runtime (cdr cond-action-list)))))
|
|
|
|
(define (cond-eval-and cond-list)
|
|
(foldr (lambda (x y) (and (cond-eval x) (cond-eval y))) #t cond-list))
|
|
|
|
(define (cond-eval-or cond-list)
|
|
(foldr (lambda (x y) (or (cond-eval x) (cond-eval y))) #f cond-list))
|
|
|
|
(define (cond-eval condition)
|
|
(cond ((symbol? condition)
|
|
(if (member condition *features*) #t #f))
|
|
((eq? condition #t) #t)
|
|
((eq? condition #f) #f)
|
|
(else (case (car condition)
|
|
((and) (cond-eval-and (cdr condition)))
|
|
((or) (cond-eval-or (cdr condition)))
|
|
((not) (if (not (null? (cddr condition)))
|
|
(error "cond-expand : 'not' takes 1 argument")
|
|
(not (cond-eval (cadr condition)))))
|
|
(else (error "cond-expand : unknown operator" (car condition)))))))
|
|
|
|
(gc-verbose #f)
|