1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
|
type global {
name: (handle array byte)
value: (handle cell)
}
type global-table {
data: (handle array global)
final-index: int
}
fn initialize-globals _self: (addr global-table) {
var self/esi: (addr global-table) <- copy _self
var data-ah/eax: (addr handle array global) <- get self, data
populate data-ah, 0x10
append-primitive self, "+"
append-primitive self, "-"
append-primitive self, "*"
append-primitive self, "/"
append-primitive self, "sqrt"
append-primitive self, "car"
append-primitive self, "cdr"
append-primitive self, "cons"
append-primitive self, "="
append-primitive self, "print"
# TODO: isolate screens per-sandbox
var screen-storage: (handle cell)
var screen-ah/ecx: (addr handle cell) <- address screen-storage
new-screen screen-ah, 5/width, 4/height
append-global self, "screen", *screen-ah
}
fn render-globals screen: (addr screen), _self: (addr global-table), xmin: int, ymin: int, xmax: int, ymax: int {
clear-rect screen, xmin, ymin, xmax, ymax, 0x12/bg=almost-black
var self/esi: (addr global-table) <- copy _self
# render primitives
var bottom-line/ecx: int <- copy ymax
bottom-line <- decrement
var data-ah/eax: (addr handle array global) <- get self, data
var data/eax: (addr array global) <- lookup *data-ah
var curr-index/edx: int <- copy 1
var x/edi: int <- copy xmin
{
var curr-offset/ebx: (offset global) <- compute-offset data, curr-index
var curr/ebx: (addr global) <- index data, curr-offset
var continue?/eax: boolean <- primitive-global? curr
compare continue?, 0/false
break-if-=
var curr-name-ah/eax: (addr handle array byte) <- get curr, name
var _curr-name/eax: (addr array byte) <- lookup *curr-name-ah
var curr-name/ebx: (addr array byte) <- copy _curr-name
{
var skip?/eax: boolean <- string-equal? curr-name, "screen"
compare skip?, 0/false
break-if-!=
var tmpx/eax: int <- copy x
tmpx <- draw-text-rightward screen, curr-name, tmpx, xmax, bottom-line, 0x2a/fg=orange, 0x12/bg=almost-black
tmpx <- draw-text-rightward screen, " ", tmpx, xmax, bottom-line, 7/fg=grey, 0x12/bg=almost-black
x <- copy tmpx
}
curr-index <- increment
loop
}
var lowest-index/edi: int <- copy curr-index
var y/ecx: int <- copy ymin
var data-ah/eax: (addr handle array global) <- get self, data
var data/eax: (addr array global) <- lookup *data-ah
var final-index/edx: (addr int) <- get self, final-index
var curr-index/edx: int <- copy *final-index
{
compare curr-index, lowest-index
break-if-<
compare y, ymax
break-if->=
{
var curr-offset/ebx: (offset global) <- compute-offset data, curr-index
var curr/ebx: (addr global) <- index data, curr-offset
var curr-name-ah/eax: (addr handle array byte) <- get curr, name
var _curr-name/eax: (addr array byte) <- lookup *curr-name-ah
var curr-name/edx: (addr array byte) <- copy _curr-name
var skip?/eax: boolean <- string-equal? curr-name, "screen"
compare skip?, 0/false
break-if-!=
var x/eax: int <- copy xmin
x, y <- draw-text-wrapping-right-then-down screen, curr-name, xmin, ymin, xmax, ymax, x, y, 0x2a/fg=orange, 0x12/bg=almost-black
x, y <- draw-text-wrapping-right-then-down screen, " <- ", xmin, ymin, xmax, ymax, x, y, 7/fg=grey, 0x12/bg=almost-black
var curr-value/edx: (addr handle cell) <- get curr, value
var s-storage: (stream byte 0x100)
var s/ebx: (addr stream byte) <- address s-storage
print-cell curr-value, s, 0/no-trace
x, y <- draw-stream-wrapping-right-then-down screen, s, xmin, ymin, xmax, ymax, x, y, 0x3/fg=cyan, 0x12/bg=almost-black
}
curr-index <- decrement
y <- increment
loop
}
}
fn primitive-global? _x: (addr global) -> _/eax: boolean {
var x/eax: (addr global) <- copy _x
var value-ah/eax: (addr handle cell) <- get x, value
var value/eax: (addr cell) <- lookup *value-ah
compare value, 0/null
{
break-if-!=
return 0/false
}
var value-type/eax: (addr int) <- get value, type
compare *value-type, 4/primitive
{
break-if-=
return 0/false
}
return 1/true
}
fn append-primitive _self: (addr global-table), name: (addr array byte) {
var self/esi: (addr global-table) <- copy _self
var final-index-addr/ecx: (addr int) <- get self, final-index
increment *final-index-addr
var curr-index/ecx: int <- copy *final-index-addr
var data-ah/eax: (addr handle array global) <- get self, data
var data/eax: (addr array global) <- lookup *data-ah
var curr-offset/esi: (offset global) <- compute-offset data, curr-index
var curr/esi: (addr global) <- index data, curr-offset
var curr-name-ah/eax: (addr handle array byte) <- get curr, name
copy-array-object name, curr-name-ah
var curr-value-ah/eax: (addr handle cell) <- get curr, value
new-primitive-function curr-value-ah, curr-index
}
fn append-global _self: (addr global-table), name: (addr array byte), value: (handle cell) {
var self/esi: (addr global-table) <- copy _self
var final-index-addr/ecx: (addr int) <- get self, final-index
increment *final-index-addr
var curr-index/ecx: int <- copy *final-index-addr
var data-ah/eax: (addr handle array global) <- get self, data
var data/eax: (addr array global) <- lookup *data-ah
var curr-offset/esi: (offset global) <- compute-offset data, curr-index
var curr/esi: (addr global) <- index data, curr-offset
var curr-name-ah/eax: (addr handle array byte) <- get curr, name
copy-array-object name, curr-name-ah
var curr-value-ah/eax: (addr handle cell) <- get curr, value
copy-handle value, curr-value-ah
}
fn lookup-symbol-in-globals _sym: (addr cell), out: (addr handle cell), _globals: (addr global-table), trace: (addr trace) {
var sym/eax: (addr cell) <- copy _sym
var sym-data-ah/eax: (addr handle stream byte) <- get sym, text-data
var _sym-data/eax: (addr stream byte) <- lookup *sym-data-ah
var sym-data/edx: (addr stream byte) <- copy _sym-data
var globals/esi: (addr global-table) <- copy _globals
{
compare globals, 0
break-if-=
var global-data-ah/eax: (addr handle array global) <- get globals, data
var global-data/eax: (addr array global) <- lookup *global-data-ah
var final-index/ecx: (addr int) <- get globals, final-index
var curr-index/ecx: int <- copy *final-index
{
compare curr-index, 0
break-if-<
var curr-offset/ebx: (offset global) <- compute-offset global-data, curr-index
var curr/ebx: (addr global) <- index global-data, curr-offset
var curr-name-ah/eax: (addr handle array byte) <- get curr, name
var curr-name/eax: (addr array byte) <- lookup *curr-name-ah
var found?/eax: boolean <- stream-data-equal? sym-data, curr-name
{
compare found?, 0/false
break-if-=
var curr-value/eax: (addr handle cell) <- get curr, value
copy-object curr-value, out
return
}
curr-index <- decrement
loop
}
}
# otherwise error "unbound symbol: ", sym
var stream-storage: (stream byte 0x40)
var stream/ecx: (addr stream byte) <- address stream-storage
write stream, "unbound symbol: "
rewind-stream sym-data
write-stream stream, sym-data
trace trace, "error", stream
}
# a little strange; goes from value to name and selects primitive based on name
fn apply-primitive _f: (addr cell), args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), _globals: (addr global-table), trace: (addr trace) {
var f/esi: (addr cell) <- copy _f
var f-index-a/ecx: (addr int) <- get f, index-data
var f-index/ecx: int <- copy *f-index-a
var globals/eax: (addr global-table) <- copy _globals
var global-data-ah/eax: (addr handle array global) <- get globals, data
var global-data/eax: (addr array global) <- lookup *global-data-ah
var f-offset/ecx: (offset global) <- compute-offset global-data, f-index
var f-value/ecx: (addr global) <- index global-data, f-offset
var f-name-ah/ecx: (addr handle array byte) <- get f-value, name
var f-name/eax: (addr array byte) <- lookup *f-name-ah
{
var is-add?/eax: boolean <- string-equal? f-name, "+"
compare is-add?, 0/false
break-if-=
apply-add args-ah, out, env-h, trace
return
}
{
var is-subtract?/eax: boolean <- string-equal? f-name, "-"
compare is-subtract?, 0/false
break-if-=
apply-subtract args-ah, out, env-h, trace
return
}
{
var is-multiply?/eax: boolean <- string-equal? f-name, "*"
compare is-multiply?, 0/false
break-if-=
apply-multiply args-ah, out, env-h, trace
return
}
{
var is-divide?/eax: boolean <- string-equal? f-name, "/"
compare is-divide?, 0/false
break-if-=
apply-divide args-ah, out, env-h, trace
return
}
{
var is-square-root?/eax: boolean <- string-equal? f-name, "sqrt"
compare is-square-root?, 0/false
break-if-=
apply-square-root args-ah, out, env-h, trace
return
}
{
var is-car?/eax: boolean <- string-equal? f-name, "car"
compare is-car?, 0/false
break-if-=
apply-car args-ah, out, env-h, trace
return
}
{
var is-cdr?/eax: boolean <- string-equal? f-name, "cdr"
compare is-cdr?, 0/false
break-if-=
apply-cdr args-ah, out, env-h, trace
return
}
{
var is-cons?/eax: boolean <- string-equal? f-name, "cons"
compare is-cons?, 0/false
break-if-=
apply-cons args-ah, out, env-h, trace
return
}
{
var is-compare?/eax: boolean <- string-equal? f-name, "="
compare is-compare?, 0/false
break-if-=
apply-compare args-ah, out, env-h, trace
return
}
{
var is-print?/eax: boolean <- string-equal? f-name, "print"
compare is-print?, 0/false
break-if-=
apply-print args-ah, out, env-h, trace
return
}
abort "unknown primitive function"
}
fn apply-add _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply +"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "+ needs 2 args but got 0"
return
}
# args->left->value
var first-ah/eax: (addr handle cell) <- get args, left
var first/eax: (addr cell) <- lookup *first-ah
var first-type/ecx: (addr int) <- get first, type
compare *first-type, 1/number
{
break-if-=
error trace, "first arg for + is not a number"
return
}
var first-value/ecx: (addr float) <- get first, number-data
# args->right->left->value
var right-ah/eax: (addr handle cell) <- get args, right
#? dump-cell right-ah
#? abort "aaa"
var right/eax: (addr cell) <- lookup *right-ah
# TODO: check that right is a pair
var second-ah/eax: (addr handle cell) <- get right, left
var second/eax: (addr cell) <- lookup *second-ah
var second-type/edx: (addr int) <- get second, type
compare *second-type, 1/number
{
break-if-=
error trace, "second arg for + is not a number"
return
}
var second-value/edx: (addr float) <- get second, number-data
# add
var result/xmm0: float <- copy *first-value
result <- add *second-value
new-float out, result
}
fn apply-subtract _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply -"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "- needs 2 args but got 0"
return
}
# args->left->value
var first-ah/eax: (addr handle cell) <- get args, left
var first/eax: (addr cell) <- lookup *first-ah
var first-type/ecx: (addr int) <- get first, type
compare *first-type, 1/number
{
break-if-=
error trace, "first arg for - is not a number"
return
}
var first-value/ecx: (addr float) <- get first, number-data
# args->right->left->value
var right-ah/eax: (addr handle cell) <- get args, right
var right/eax: (addr cell) <- lookup *right-ah
# TODO: check that right is a pair
var second-ah/eax: (addr handle cell) <- get right, left
var second/eax: (addr cell) <- lookup *second-ah
var second-type/edx: (addr int) <- get second, type
compare *second-type, 1/number
{
break-if-=
error trace, "second arg for - is not a number"
return
}
var second-value/edx: (addr float) <- get second, number-data
# subtract
var result/xmm0: float <- copy *first-value
result <- subtract *second-value
new-float out, result
}
fn apply-multiply _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply *"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "* needs 2 args but got 0"
return
}
# args->left->value
var first-ah/eax: (addr handle cell) <- get args, left
var first/eax: (addr cell) <- lookup *first-ah
var first-type/ecx: (addr int) <- get first, type
compare *first-type, 1/number
{
break-if-=
error trace, "first arg for * is not a number"
return
}
var first-value/ecx: (addr float) <- get first, number-data
# args->right->left->value
var right-ah/eax: (addr handle cell) <- get args, right
var right/eax: (addr cell) <- lookup *right-ah
# TODO: check that right is a pair
var second-ah/eax: (addr handle cell) <- get right, left
var second/eax: (addr cell) <- lookup *second-ah
var second-type/edx: (addr int) <- get second, type
compare *second-type, 1/number
{
break-if-=
error trace, "second arg for * is not a number"
return
}
var second-value/edx: (addr float) <- get second, number-data
# multiply
var result/xmm0: float <- copy *first-value
result <- multiply *second-value
new-float out, result
}
fn apply-divide _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply /"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "/ needs 2 args but got 0"
return
}
# args->left->value
var first-ah/eax: (addr handle cell) <- get args, left
var first/eax: (addr cell) <- lookup *first-ah
var first-type/ecx: (addr int) <- get first, type
compare *first-type, 1/number
{
break-if-=
error trace, "first arg for / is not a number"
return
}
var first-value/ecx: (addr float) <- get first, number-data
# args->right->left->value
var right-ah/eax: (addr handle cell) <- get args, right
var right/eax: (addr cell) <- lookup *right-ah
# TODO: check that right is a pair
var second-ah/eax: (addr handle cell) <- get right, left
var second/eax: (addr cell) <- lookup *second-ah
var second-type/edx: (addr int) <- get second, type
compare *second-type, 1/number
{
break-if-=
error trace, "second arg for / is not a number"
return
}
var second-value/edx: (addr float) <- get second, number-data
# divide
var result/xmm0: float <- copy *first-value
result <- divide *second-value
new-float out, result
}
fn apply-square-root _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply sqrt"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "sqrt needs 1 args but got 0"
return
}
# args->left->value
var first-ah/eax: (addr handle cell) <- get args, left
var first/eax: (addr cell) <- lookup *first-ah
var first-type/ecx: (addr int) <- get first, type
compare *first-type, 1/number
{
break-if-=
error trace, "arg for sqrt is not a number"
return
}
var first-value/ecx: (addr float) <- get first, number-data
# square-root
var result/xmm0: float <- square-root *first-value
new-float out, result
}
fn apply-car _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply car"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "car needs 1 args but got 0"
return
}
# args->left
var first-ah/eax: (addr handle cell) <- get args, left
var first/eax: (addr cell) <- lookup *first-ah
var first-type/ecx: (addr int) <- get first, type
compare *first-type, 0/pair
{
break-if-=
error trace, "arg for car is not a pair"
return
}
# car
var result/eax: (addr handle cell) <- get first, left
copy-object result, out
}
fn apply-cdr _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply cdr"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "cdr needs 1 args but got 0"
return
}
# args->left
var first-ah/eax: (addr handle cell) <- get args, left
var first/eax: (addr cell) <- lookup *first-ah
var first-type/ecx: (addr int) <- get first, type
compare *first-type, 0/pair
{
break-if-=
error trace, "arg for cdr is not a pair"
return
}
# cdr
var result/eax: (addr handle cell) <- get first, right
copy-object result, out
}
fn apply-cons _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply cons"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "cons needs 2 args but got 0"
return
}
# args->left
var first-ah/ecx: (addr handle cell) <- get args, left
# args->right->left
var right-ah/eax: (addr handle cell) <- get args, right
var right/eax: (addr cell) <- lookup *right-ah
# TODO: check that right is a pair
var second-ah/eax: (addr handle cell) <- get right, left
# cons
new-pair out, *first-ah, *second-ah
}
fn apply-compare _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply ="
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "cons needs 2 args but got 0"
return
}
# args->left
var first-ah/ecx: (addr handle cell) <- get args, left
# args->right->left
var right-ah/eax: (addr handle cell) <- get args, right
var right/eax: (addr cell) <- lookup *right-ah
# TODO: check that right is a pair
var second-ah/edx: (addr handle cell) <- get right, left
# compare
var _first/eax: (addr cell) <- lookup *first-ah
var first/ecx: (addr cell) <- copy _first
var second/eax: (addr cell) <- lookup *second-ah
var match?/eax: boolean <- cell-isomorphic? first, second, trace
compare match?, 0/false
{
break-if-!=
nil out
return
}
new-integer out, 1/true
}
fn apply-print _args-ah: (addr handle cell), out: (addr handle cell), env-h: (handle cell), trace: (addr trace) {
trace-text trace, "eval", "apply print"
var args-ah/eax: (addr handle cell) <- copy _args-ah
var _args/eax: (addr cell) <- lookup *args-ah
var args/esi: (addr cell) <- copy _args
var _env/eax: (addr cell) <- lookup env-h
var env/edi: (addr cell) <- copy _env
# TODO: check that args is a pair
var empty-args?/eax: boolean <- nil? args
compare empty-args?, 0/false
{
break-if-=
error trace, "cons needs 2 args but got 0"
return
}
# screen = args->left
var first-ah/eax: (addr handle cell) <- get args, left
var first/eax: (addr cell) <- lookup *first-ah
var first-type/ecx: (addr int) <- get first, type
compare *first-type, 5/screen
{
break-if-=
error trace, "first arg for 'print' is not a screen"
return
}
var screen-ah/eax: (addr handle screen) <- get first, screen-data
var _screen/eax: (addr screen) <- lookup *screen-ah
var screen/ecx: (addr screen) <- copy _screen
# args->right->left
var right-ah/eax: (addr handle cell) <- get args, right
var right/eax: (addr cell) <- lookup *right-ah
# TODO: check that right is a pair
var second-ah/eax: (addr handle cell) <- get right, left
var stream-storage: (stream byte 0x100)
var stream/edi: (addr stream byte) <- address stream-storage
print-cell second-ah, stream, trace
draw-stream-wrapping-right-then-down-from-cursor-over-full-screen screen, stream, 7/fg, 0/bg
# return what was printed
copy-object second-ah, out
}
|