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
|
# grapheme stacks are the smallest unit of editable text
type grapheme-stack {
data: (handle array grapheme)
top: int
}
fn initialize-grapheme-stack _self: (addr grapheme-stack), n: int {
var self/esi: (addr grapheme-stack) <- copy _self
var d/edi: (addr handle array grapheme) <- get self, data
populate d, n
var top/eax: (addr int) <- get self, top
copy-to *top, 0
}
fn clear-grapheme-stack _self: (addr grapheme-stack) {
var self/esi: (addr grapheme-stack) <- copy _self
var top/eax: (addr int) <- get self, top
copy-to *top, 0
}
fn grapheme-stack-empty? _self: (addr grapheme-stack) -> _/eax: boolean {
var self/esi: (addr grapheme-stack) <- copy _self
var top/eax: (addr int) <- get self, top
compare *top, 0
{
break-if-!=
return 1/true
}
return 0/false
}
fn grapheme-stack-length _self: (addr grapheme-stack) -> _/eax: int {
var self/esi: (addr grapheme-stack) <- copy _self
var top/eax: (addr int) <- get self, top
return *top
}
fn push-grapheme-stack _self: (addr grapheme-stack), _val: grapheme {
var self/esi: (addr grapheme-stack) <- copy _self
var top-addr/ecx: (addr int) <- get self, top
var data-ah/edx: (addr handle array grapheme) <- get self, data
var data/eax: (addr array grapheme) <- lookup *data-ah
var top/edx: int <- copy *top-addr
var dest-addr/edx: (addr grapheme) <- index data, top
var val/eax: grapheme <- copy _val
copy-to *dest-addr, val
add-to *top-addr, 1
}
fn pop-grapheme-stack _self: (addr grapheme-stack) -> _/eax: grapheme {
var self/esi: (addr grapheme-stack) <- copy _self
var top-addr/ecx: (addr int) <- get self, top
{
compare *top-addr, 0
break-if->
return -1
}
subtract-from *top-addr, 1
var data-ah/edx: (addr handle array grapheme) <- get self, data
var data/eax: (addr array grapheme) <- lookup *data-ah
var top/edx: int <- copy *top-addr
var result-addr/eax: (addr grapheme) <- index data, top
return *result-addr
}
fn copy-grapheme-stack _src: (addr grapheme-stack), dest: (addr grapheme-stack) {
var src/esi: (addr grapheme-stack) <- copy _src
var data-ah/edi: (addr handle array grapheme) <- get src, data
var _data/eax: (addr array grapheme) <- lookup *data-ah
var data/edi: (addr array grapheme) <- copy _data
var top-addr/ecx: (addr int) <- get src, top
var i/eax: int <- copy 0
{
compare i, *top-addr
break-if->=
var g/edx: (addr grapheme) <- index data, i
push-grapheme-stack dest, *g
i <- increment
loop
}
}
# dump stack to screen from bottom to top
# hardcoded colors:
# matching paren
fn render-stack-from-bottom-wrapping-right-then-down screen: (addr screen), _self: (addr grapheme-stack), xmin: int, ymin: int, xmax: int, ymax: int, _x: int, _y: int, highlight-matching-open-paren?: boolean, open-paren-depth: int, color: int, background-color: int -> _/eax: int, _/ecx: int {
var self/esi: (addr grapheme-stack) <- copy _self
var matching-open-paren-index/edx: int <- get-matching-open-paren-index self, highlight-matching-open-paren?, open-paren-depth
var data-ah/edi: (addr handle array grapheme) <- get self, data
var _data/eax: (addr array grapheme) <- lookup *data-ah
var data/edi: (addr array grapheme) <- copy _data
var x/eax: int <- copy _x
var y/ecx: int <- copy _y
var top-addr/esi: (addr int) <- get self, top
var i/ebx: int <- copy 0
{
compare i, *top-addr
break-if->=
{
var g/esi: (addr grapheme) <- index data, i
var fg: int
{
var tmp/eax: int <- copy color
copy-to fg, tmp
}
{
compare i, matching-open-paren-index
break-if-!=
copy-to fg, 0xf/highlight
}
x, y <- render-grapheme screen, *g, xmin, ymin, xmax, ymax, x, y, fg, background-color
}
i <- increment
loop
}
return x, y
}
# helper for small words
fn render-stack-from-bottom screen: (addr screen), self: (addr grapheme-stack), x: int, y: int, highlight-matching-open-paren?: boolean, open-paren-depth: int -> _/eax: int {
var _width/eax: int <- copy 0
var _height/ecx: int <- copy 0
_width, _height <- screen-size screen
var width/edx: int <- copy _width
var height/ebx: int <- copy _height
var x2/eax: int <- copy 0
var y2/ecx: int <- copy 0
x2, y2 <- render-stack-from-bottom-wrapping-right-then-down screen, self, x, y, width, height, x, y, highlight-matching-open-paren?, open-paren-depth, 3/fg=cyan, 0xc5/bg=blue-bg
return x2 # y2? yolo
}
# dump stack to screen from top to bottom
# optionally render a 'cursor' with the top grapheme
# hard-coded colors:
# matching paren
# cursor
fn render-stack-from-top-wrapping-right-then-down screen: (addr screen), _self: (addr grapheme-stack), xmin: int, ymin: int, xmax: int, ymax: int, _x: int, _y: int, render-cursor?: boolean, color: int, background-color: int -> _/eax: int, _/ecx: int {
var self/esi: (addr grapheme-stack) <- copy _self
var matching-close-paren-index/edx: int <- get-matching-close-paren-index self, render-cursor?
var data-ah/eax: (addr handle array grapheme) <- get self, data
var _data/eax: (addr array grapheme) <- lookup *data-ah
var data/edi: (addr array grapheme) <- copy _data
var x/eax: int <- copy _x
var y/ecx: int <- copy _y
var top-addr/ebx: (addr int) <- get self, top
var i/ebx: int <- copy *top-addr
i <- decrement
# if render-cursor?, peel off first iteration
{
compare render-cursor?, 0/false
break-if-=
compare i, 0
break-if-<
var g/esi: (addr grapheme) <- index data, i
x, y <- render-grapheme screen, *g, xmin, ymin, xmax, ymax, x, y, background-color, color
i <- decrement
}
# remaining iterations
{
compare i, 0
break-if-<
# highlight matching paren if needed
var fg: int
{
var tmp/eax: int <- copy color
copy-to fg, tmp
}
compare i, matching-close-paren-index
{
break-if-!=
copy-to fg, 0xf/highlight
}
#
var g/esi: (addr grapheme) <- index data, i
x, y <- render-grapheme screen, *g, xmin, ymin, xmax, ymax, x, y, fg, background-color
i <- decrement
loop
}
return x, y
}
# helper for small words
fn render-stack-from-top screen: (addr screen), self: (addr grapheme-stack), x: int, y: int, render-cursor?: boolean -> _/eax: int {
var _width/eax: int <- copy 0
var _height/ecx: int <- copy 0
_width, _height <- screen-size screen
var width/edx: int <- copy _width
var height/ebx: int <- copy _height
var x2/eax: int <- copy 0
var y2/ecx: int <- copy 0
x2, y2 <- render-stack-from-top-wrapping-right-then-down screen, self, x, y, width, height, x, y, render-cursor?, 3/fg=cyan, 0xc5/bg=blue-bg
return x2 # y2? yolo
}
fn test-render-grapheme-stack {
# setup: gs = "abc"
var gs-storage: grapheme-stack
var gs/edi: (addr grapheme-stack) <- address gs-storage
initialize-grapheme-stack gs, 5
var g/eax: grapheme <- copy 0x61/a
push-grapheme-stack gs, g
g <- copy 0x62/b
push-grapheme-stack gs, g
g <- copy 0x63/c
push-grapheme-stack gs, g
# setup: screen
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4, 0/no-pixel-graphics
#
var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 0/y, 0/no-highlight-matching-open-paren, 0/open-paren-depth
check-screen-row screen, 0/y, "abc ", "F - test-render-grapheme-stack from bottom"
check-ints-equal x, 3, "F - test-render-grapheme-stack from bottom: result"
check-background-color-in-screen-row screen, 3/bg=reverse, 0/y, " ", "F - test-render-grapheme-stack from bottom: bg"
#
var x/eax: int <- render-stack-from-top screen, gs, 0/x, 1/y, 0/cursor=false
check-screen-row screen, 1/y, "cba ", "F - test-render-grapheme-stack from top without cursor"
check-ints-equal x, 3, "F - test-render-grapheme-stack from top without cursor: result"
check-background-color-in-screen-row screen, 3/bg=reverse, 1/y, " ", "F - test-render-grapheme-stack from top without cursor: bg"
#
var x/eax: int <- render-stack-from-top screen, gs, 0/x, 2/y, 1/cursor=true
check-screen-row screen, 2/y, "cba ", "F - test-render-grapheme-stack from top with cursor"
check-ints-equal x, 3, "F - test-render-grapheme-stack from top with cursor: result"
check-background-color-in-screen-row screen, 3/bg=reverse, 2/y, "| ", "F - test-render-grapheme-stack from top with cursor: bg"
}
fn test-render-grapheme-stack-while-highlighting-matching-close-paren {
# setup: gs = "(b)"
var gs-storage: grapheme-stack
var gs/edi: (addr grapheme-stack) <- address gs-storage
initialize-grapheme-stack gs, 5
var g/eax: grapheme <- copy 0x29/close-paren
push-grapheme-stack gs, g
g <- copy 0x62/b
push-grapheme-stack gs, g
g <- copy 0x28/open-paren
push-grapheme-stack gs, g
# setup: screen
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4, 0/no-pixel-graphics
#
var x/eax: int <- render-stack-from-top screen, gs, 0/x, 2/y, 1/cursor=true
check-screen-row screen, 2/y, "(b) ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren"
check-background-color-in-screen-row screen, 3/bg=reverse, 2/y, "| ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren: cursor"
check-screen-row-in-color screen, 0xf/fg=white, 2/y, " ) ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren: matching paren"
}
fn test-render-grapheme-stack-while-highlighting-matching-close-paren-2 {
# setup: gs = "(a (b)) c"
var gs-storage: grapheme-stack
var gs/edi: (addr grapheme-stack) <- address gs-storage
initialize-grapheme-stack gs, 0x10
var g/eax: grapheme <- copy 0x63/c
push-grapheme-stack gs, g
g <- copy 0x20/space
push-grapheme-stack gs, g
g <- copy 0x29/close-paren
push-grapheme-stack gs, g
g <- copy 0x29/close-paren
push-grapheme-stack gs, g
g <- copy 0x62/b
push-grapheme-stack gs, g
g <- copy 0x28/open-paren
push-grapheme-stack gs, g
g <- copy 0x20/space
push-grapheme-stack gs, g
g <- copy 0x61/a
push-grapheme-stack gs, g
g <- copy 0x28/open-paren
push-grapheme-stack gs, g
# setup: screen
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4, 0/no-pixel-graphics
#
var x/eax: int <- render-stack-from-top screen, gs, 0/x, 2/y, 1/cursor=true
check-screen-row screen, 2/y, "(a (b)) c ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren-2"
check-background-color-in-screen-row screen, 3/bg=reverse, 2/y, "| ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren-2: cursor"
check-screen-row-in-color screen, 0xf/fg=white, 2/y, " ) ", "F - test-render-grapheme-stack-while-highlighting-matching-close-paren-2: matching paren"
}
fn test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end {
# setup: gs = "(b)"
var gs-storage: grapheme-stack
var gs/edi: (addr grapheme-stack) <- address gs-storage
initialize-grapheme-stack gs, 5
var g/eax: grapheme <- copy 0x28/open-paren
push-grapheme-stack gs, g
g <- copy 0x62/b
push-grapheme-stack gs, g
g <- copy 0x29/close-paren
push-grapheme-stack gs, g
# setup: screen
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4, 0/no-pixel-graphics
#
var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 2/y, 1/highlight-matching-open-paren, 1/open-paren-depth
check-screen-row screen, 2/y, "(b) ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end"
check-screen-row-in-color screen, 0xf/fg=white, 2/y, "( ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end: matching paren"
}
fn test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end-2 {
# setup: gs = "a((b))"
var gs-storage: grapheme-stack
var gs/edi: (addr grapheme-stack) <- address gs-storage
initialize-grapheme-stack gs, 0x10
var g/eax: grapheme <- copy 0x61/a
push-grapheme-stack gs, g
g <- copy 0x28/open-paren
push-grapheme-stack gs, g
g <- copy 0x28/open-paren
push-grapheme-stack gs, g
g <- copy 0x62/b
push-grapheme-stack gs, g
g <- copy 0x29/close-paren
push-grapheme-stack gs, g
g <- copy 0x29/close-paren
push-grapheme-stack gs, g
# setup: screen
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4, 0/no-pixel-graphics
#
var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 2/y, 1/highlight-matching-open-paren, 1/open-paren-depth
check-screen-row screen, 2/y, "a((b)) ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end-2"
check-screen-row-in-color screen, 0xf/fg=white, 2/y, " ( ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-with-close-paren-at-end-2: matching paren"
}
fn test-render-grapheme-stack-while-highlighting-matching-open-paren {
# setup: gs = "(b"
var gs-storage: grapheme-stack
var gs/edi: (addr grapheme-stack) <- address gs-storage
initialize-grapheme-stack gs, 5
var g/eax: grapheme <- copy 0x28/open-paren
push-grapheme-stack gs, g
g <- copy 0x62/b
push-grapheme-stack gs, g
# setup: screen
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4, 0/no-pixel-graphics
#
var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 2/y, 1/highlight-matching-open-paren, 0/open-paren-depth
check-screen-row screen, 2/y, "(b ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren"
check-screen-row-in-color screen, 0xf/fg=white, 2/y, "( ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren: matching paren"
}
fn test-render-grapheme-stack-while-highlighting-matching-open-paren-2 {
# setup: gs = "a((b)"
var gs-storage: grapheme-stack
var gs/edi: (addr grapheme-stack) <- address gs-storage
initialize-grapheme-stack gs, 0x10
var g/eax: grapheme <- copy 0x61/a
push-grapheme-stack gs, g
g <- copy 0x28/open-paren
push-grapheme-stack gs, g
g <- copy 0x28/open-paren
push-grapheme-stack gs, g
g <- copy 0x62/b
push-grapheme-stack gs, g
g <- copy 0x29/close-paren
push-grapheme-stack gs, g
# setup: screen
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4, 0/no-pixel-graphics
#
var x/eax: int <- render-stack-from-bottom screen, gs, 0/x, 2/y, 1/highlight-matching-open-paren, 0/open-paren-depth
check-screen-row screen, 2/y, "a((b) ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-2"
check-screen-row-in-color screen, 0xf/fg=white, 2/y, " ( ", "F - test-render-grapheme-stack-while-highlighting-matching-open-paren-2: matching paren"
}
# return the index of the matching close-paren of the grapheme at cursor (top of stack)
# or top index if there's no matching close-paren
fn get-matching-close-paren-index _self: (addr grapheme-stack), render-cursor?: boolean -> _/edx: int {
var self/esi: (addr grapheme-stack) <- copy _self
var top-addr/edx: (addr int) <- get self, top
# if not rendering cursor, return
compare render-cursor?, 0/false
{
break-if-!=
return *top-addr
}
var data-ah/eax: (addr handle array grapheme) <- get self, data
var data/eax: (addr array grapheme) <- lookup *data-ah
var i/ecx: int <- copy *top-addr
# if stack is empty, return
compare i, 0
{
break-if->
return *top-addr
}
# if cursor is not '(' return
i <- decrement
var g/esi: (addr grapheme) <- index data, i
compare *g, 0x28/open-paren
{
break-if-=
return *top-addr
}
# otherwise scan to matching paren
var paren-count/ebx: int <- copy 1
i <- decrement
{
compare i, 0
break-if-<
var g/esi: (addr grapheme) <- index data, i
compare *g, 0x28/open-paren
{
break-if-!=
paren-count <- increment
}
compare *g, 0x29/close-paren
{
break-if-!=
compare paren-count, 1
{
break-if-!=
return i
}
paren-count <- decrement
}
i <- decrement
loop
}
return *top-addr
}
# return the index of the first open-paren at the given depth
# or top index if there's no matching close-paren
fn get-matching-open-paren-index _self: (addr grapheme-stack), control: boolean, depth: int -> _/edx: int {
var self/esi: (addr grapheme-stack) <- copy _self
var top-addr/edx: (addr int) <- get self, top
# if not rendering cursor, return
compare control, 0/false
{
break-if-!=
return *top-addr
}
var data-ah/eax: (addr handle array grapheme) <- get self, data
var data/eax: (addr array grapheme) <- lookup *data-ah
var i/ecx: int <- copy *top-addr
# if stack is empty, return
compare i, 0
{
break-if->
return *top-addr
}
# scan to matching open paren
var paren-count/ebx: int <- copy 0
i <- decrement
{
compare i, 0
break-if-<
var g/esi: (addr grapheme) <- index data, i
compare *g, 0x29/close-paren
{
break-if-!=
paren-count <- increment
}
compare *g, 0x28/open-paren
{
break-if-!=
compare paren-count, depth
{
break-if-!=
return i
}
paren-count <- decrement
}
i <- decrement
loop
}
return *top-addr
}
# compare from bottom
# beware: modifies 'stream', which must be disposed of after a false result
fn prefix-match? _self: (addr grapheme-stack), s: (addr stream byte) -> _/eax: boolean {
var self/esi: (addr grapheme-stack) <- copy _self
var data-ah/edi: (addr handle array grapheme) <- get self, data
var _data/eax: (addr array grapheme) <- lookup *data-ah
var data/edi: (addr array grapheme) <- copy _data
var top-addr/ecx: (addr int) <- get self, top
var i/ebx: int <- copy 0
{
compare i, *top-addr
break-if->=
# if curr != expected, return false
{
var curr-a/edx: (addr grapheme) <- index data, i
var expected/eax: grapheme <- read-grapheme s
{
compare expected, *curr-a
break-if-=
return 0/false
}
}
i <- increment
loop
}
return 1 # true
}
# compare from bottom
# beware: modifies 'stream', which must be disposed of after a false result
fn suffix-match? _self: (addr grapheme-stack), s: (addr stream byte) -> _/eax: boolean {
var self/esi: (addr grapheme-stack) <- copy _self
var data-ah/edi: (addr handle array grapheme) <- get self, data
var _data/eax: (addr array grapheme) <- lookup *data-ah
var data/edi: (addr array grapheme) <- copy _data
var top-addr/eax: (addr int) <- get self, top
var i/ebx: int <- copy *top-addr
i <- decrement
{
compare i, 0
break-if-<
{
var curr-a/edx: (addr grapheme) <- index data, i
var expected/eax: grapheme <- read-grapheme s
# if curr != expected, return false
{
compare expected, *curr-a
break-if-=
return 0/false
}
}
i <- decrement
loop
}
return 1 # true
}
fn grapheme-stack-is-decimal-integer? _self: (addr grapheme-stack) -> _/eax: boolean {
var self/esi: (addr grapheme-stack) <- copy _self
var data-ah/eax: (addr handle array grapheme) <- get self, data
var _data/eax: (addr array grapheme) <- lookup *data-ah
var data/edx: (addr array grapheme) <- copy _data
var top-addr/ecx: (addr int) <- get self, top
var i/ebx: int <- copy 0
var result/eax: boolean <- copy 1/true
$grapheme-stack-is-integer?:loop: {
compare i, *top-addr
break-if->=
var g/edx: (addr grapheme) <- index data, i
result <- decimal-digit? *g
compare result, 0/false
break-if-=
i <- increment
loop
}
return result
}
|