213 lines
5.3 KiB
Plaintext
213 lines
5.3 KiB
Plaintext
(
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(globals . (
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(mac . [define mac
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(litmac litfn () ((m . params) . body)
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`(define ,m
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(litmac litfn () ,params ,@body)))])
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(def . [mac (def (name . params) . body)
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`(define ,name (fn ,params ,@body))])
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(do . [mac (do . body)
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`((fn () ,@body))])
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(let . [mac (let var val . body)
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`((fn (,var) ,@body) ,val)])
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(when . [mac (when cond . body)
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`(if ,cond (do ,@body) ())])
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(iflet . [mac (iflet var expr then else)
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`(let ,var ,expr
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(if ,var ,then ,else))])
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(aif . [mac (aif expr then else)
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`(iflet it ,expr ,then ,else)])
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(list . [def (list . args)
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# we should probably make a copy here
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args])
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(ret . [mac (ret var val . body)
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`(let ,var ,val ,@body ,var)])
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(len . [def (len l)
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if (no l)
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0
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(1 + (len (cdr l)))])
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(nth . [def (nth n xs)
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if (n < 1)
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(car xs)
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(nth n-1 (cdr xs))])
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(map1 . [def (map1 f xs)
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if (no xs)
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()
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(cons (f (car xs))
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(map1 f (cdr xs)))])
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(compose . [def (compose f g)
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(fn args
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(f (apply g args)))])
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(caar . [define caar (compose car car)])
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(cadr . [define cadr (compose car cdr)])
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(cddr . [define cddr (compose cdr cdr)])
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(cdar . [define cdar (compose cdr car)])
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(some . [def (some f xs)
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if (no xs)
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()
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if (f (car xs))
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xs
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(some f (cdr xs))])
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(any . [define any some])
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(all . [def (all f xs)
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if (no xs)
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1
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if (f (car xs))
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(all f (cdr xs))
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()])
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(find . [def (find x xs)
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if (no xs)
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()
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if (x = (car xs))
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1
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(find x (cdr xs))])
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(pair . [def (pair xs)
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if (no xs)
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()
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if (no (cdr xs))
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(list (list (car xs)))
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(cons (list (car xs) (cadr xs))
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(pair (cddr xs)))])
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(with . [mac (with bindings . body)
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`((fn ,(map1 car (pair bindings))
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,@body)
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,@(map1 cadr (pair bindings)))])
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(afn . [mac (afn params . body)
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`(let self ()
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(set self (fn ,params ,@body)))])
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(seq . [def (seq n)
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((afn (i)
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(if (i > n)
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()
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(cons i (self i+1))))
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1)])
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(each . [mac (each x xs . body)
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`(walk ,xs (fn (,x) ,@body))])
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(walk . [def (walk xs f)
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when xs
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(f (car xs))
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(walk (cdr xs) f)])
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(rem . [def (rem f xs)
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if (no xs)
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()
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let rest (rem f (cdr xs))
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if (f (car xs))
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rest
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(cons (car xs) rest)])
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(keep . [def (keep f xs)
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if (no xs)
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()
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let rest (keep f (cdr xs))
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if (f (car xs))
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(cons (car xs) rest)
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rest])
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(alist? . [def (alist? x)
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(and (cons? x)
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(cons? (car x)))])
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(assoc . [def (assoc alist key)
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if (no alist)
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()
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if (key = (caar alist))
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(car alist)
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(assoc (cdr alist) key)])
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(get . [def (get alist key)
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aif (assoc alist key)
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(cdr it)
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()])
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(++ . [mac (++ var) `(set ,var (,var + 1))])
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(+= . [mac (var += inc)
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`(set ,var (,var + ,inc))])
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(for . [mac (for var init test update . body)
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`(let ,var ,init
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(while ,test
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,@body
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,update))])
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(hline1 . [def (hline1 screen y x xmax color)
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while (x < xmax)
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(pixel screen x y color)
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++x])
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(vline1 . [def (vline1 screen x y ymax color)
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while (y < ymax)
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(pixel screen x y color)
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++y])
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(hline . [def (hline scr y color)
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(hline1 scr y 0 (width scr) color)])
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(vline . [def (vline scr x color)
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(vline1 scr x 0 (height scr) color)])
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(line . [def (line screen x0 y0 x1 y1 color)
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with (x x0
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y y0
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dx (abs x1-x0)
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dy (0 - (abs y1-y0))
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sx (sgn x1-x0)
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sy (sgn y1-y0))
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let err dx+dy
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while (not (and (x = x1)
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(y = y1)))
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(pixel screen x y color)
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let e2 err*2
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when (e2 >= dy)
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x += sx
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when (e2 <= dx)
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y += sy
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err +=
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(+ (if (e2 >= dy)
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dy
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0)
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(if (e2 <= dx)
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dx
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0))])
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(read_line . [def (read_line keyboard)
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ret str (stream)
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let c (key keyboard)
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while (not (or (c = 0) (c = 10)))
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(write str c)
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(set c (key keyboard))])
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(wait . [def (wait keyboard)
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while (= 0 (key keyboard))
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()])
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(sq . [def (sq n) (n * n)])
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(cube . [def (cube n) (n * n * n)])
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(fill_rect . [def (fill_rect screen x1 y1 x2 y2 color)
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for y y1 (y < y2) ++y
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(hline1 screen y x1 x2 color)])
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(circle . [def (circle scr cx cy r clr)
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with (x (0 - r)
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y 0
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err (2 - 2*r)
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continue? 1)
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while continue?
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(pixel scr cx-x cy+y clr)
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(pixel scr cx-y cy-x clr)
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(pixel scr cx+x cy-y clr)
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(pixel scr cx+y cy+x clr)
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(set r err)
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when (r <= y)
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++y
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err += (2*y + 1)
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when (or (r > x) (err > y))
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++x
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err += (2*x + 1)
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set continue? (x < 0)])
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(ring . [def (ring screen cx cy r0 w clr)
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for r r0 (r < r0+w) ++r
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(circle screen cx cy r clr)])
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(Greys . [define Greys
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(map1 (fn(n) n+15)
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(seq 16))])
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(Pinks . [define Pinks '(84 85 59 60 61
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13 36 37 5 108)])
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(palette . [def (palette p i)
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(nth (i % (len p)) p)])
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(pat . [def (pat screen)
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with (w (width screen)
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h (height screen))
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for y 0 (y < h) ++y
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for x 0 (x < w) ++x
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(pixel screen x y x*y)])
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(main . [def (main screen keyboard)
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(pat screen)])
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))
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(sandbox . [circle screen 35 35 14 3])
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)
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