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
|
# Wrappers for real screen primitives that can be passed a fake screen.
# There are no tests here, but commented scenarios are painstakingly validated
# against a real terminal emulator. I believe functionality here is broadly
# portable across terminal emulators.
#
# Remember: fake screen co-ordinates are 1-based, just like in real terminal
# emulators.
type screen {
num-rows: int
num-cols: int
data: (handle array screen-cell)
top-index: int
cursor-row: int
cursor-col: int
cursor-hide?: boolean
curr-attributes: screen-cell
}
type screen-cell {
data: grapheme
color: int
background-color: int
bold?: boolean
underline?: boolean
reverse?: boolean
blink?: boolean
}
fn initialize-screen screen: (addr screen), nrows: int, ncols: int {
var screen-addr/esi: (addr screen) <- copy screen
var tmp/eax: int <- copy 0
var dest/edi: (addr int) <- copy 0
# screen->num-rows = nrows
dest <- get screen-addr, num-rows
tmp <- copy nrows
copy-to *dest, tmp
# screen->num-cols = ncols
dest <- get screen-addr, num-cols
tmp <- copy ncols
copy-to *dest, tmp
# screen->data = new screen-cell[nrows*ncols]
{
var data-addr/edi: (addr handle array screen-cell) <- get screen-addr, data
tmp <- multiply nrows
populate data-addr, tmp
}
# screen->cursor-row = 1
dest <- get screen-addr, cursor-row
copy-to *dest, 1
# screen->cursor-col = 1
dest <- get screen-addr, cursor-col
copy-to *dest, 1
# screen->curr-attributes->background-color = 7 (simulate light background)
var tmp2/eax: (addr screen-cell) <- get screen-addr, curr-attributes
dest <- get tmp2, background-color
copy-to *dest, 7
}
fn screen-size screen: (addr screen) -> nrows/eax: int, ncols/ecx: int {
$screen-size:body: {
compare screen, 0
{
break-if-!=
nrows, ncols <- real-screen-size
break $screen-size:body
}
{
break-if-=
# fake screen
var screen-addr/esi: (addr screen) <- copy screen
var tmp/edx: (addr int) <- get screen-addr, num-rows
nrows <- copy *tmp
tmp <- get screen-addr, num-cols
ncols <- copy *tmp
}
}
}
fn clear-screen screen: (addr screen) {
$clear-screen:body: {
compare screen, 0
{
break-if-!=
clear-real-screen
break $clear-screen:body
}
{
break-if-=
# fake screen
var space/edi: grapheme <- copy 0x20
move-cursor screen, 1, 1
var screen-addr/esi: (addr screen) <- copy screen
var i/eax: int <- copy 1
var nrows/ecx: (addr int) <- get screen-addr, num-rows
{
compare i, *nrows
break-if->
var j/edx: int <- copy 1
var ncols/ebx: (addr int) <- get screen-addr, num-cols
{
compare j, *ncols
break-if->
print-grapheme screen, space
j <- increment
loop
}
i <- increment
loop
}
move-cursor screen, 1, 1
}
}
}
fn move-cursor screen: (addr screen), row: int, column: int {
$move-cursor:body: {
compare screen, 0
{
break-if-!=
move-cursor-on-real-screen row, column
break $move-cursor:body
}
{
break-if-=
# fake screen
var screen-addr/esi: (addr screen) <- copy screen
# row < 0 is ignored
{
compare row, 0
break-if-< $move-cursor:body
}
# row = 0 is treated same as 1
{
compare row, 0
break-if-!=
copy-to row, 1
}
# row > num-rows saturates to num-rows
{
var nrows-addr/eax: (addr int) <- get screen-addr, num-rows
var nrows/eax: int <- copy *nrows-addr
compare row, nrows
break-if-<=
copy-to row, nrows
}
# column < 0 is ignored
{
compare column, 0
break-if-< $move-cursor:body
}
# column = 0 is treated same as 1
{
compare column, 0
break-if-!=
copy-to column, 1
}
# column > num-cols saturates to num-cols+1 (so wrapping to next row)
{
var ncols-addr/eax: (addr int) <- get screen-addr, num-cols
var ncols/eax: int <- copy *ncols-addr
compare column, ncols
break-if-<=
copy-to column, ncols
increment column
}
# screen->cursor-row = row
var dest/edi: (addr int) <- get screen-addr, cursor-row
var src/eax: int <- copy row
copy-to *dest, src
# screen->cursor-col = column
dest <- get screen-addr, cursor-col
src <- copy column
copy-to *dest, src
}
}
}
fn print-string screen: (addr screen), s: (addr array byte) {
$print-string:body: {
compare screen, 0
{
break-if-!=
print-string-to-real-screen s
break $print-string:body
}
{
break-if-=
# fake screen
var s2: (stream byte 0x100)
var s2-addr/esi: (addr stream byte) <- address s2
write s2-addr, s
var screen-addr/edi: (addr screen) <- copy screen
{
var done?/eax: boolean <- stream-empty? s2-addr
compare done?, 0
break-if-!=
var idx/ecx: int <- current-screen-cell-index screen-addr
var data-ah/eax: (addr handle array screen-cell) <- get screen-addr, data
var data/eax: (addr array screen-cell) <- lookup *data-ah
var offset/ecx: (offset screen-cell) <- compute-offset data, idx
var cell/eax: (addr screen-cell) <- index data, offset
var dest/ecx: (addr grapheme) <- get cell, data
var g/eax: grapheme <- read-grapheme s2-addr
copy-to *dest, g
var cursor-col-addr/ecx: (addr int) <- get screen-addr, cursor-col
increment *cursor-col-addr
loop
}
}
}
}
fn print-grapheme screen: (addr screen), c: grapheme {
$print-grapheme:body: {
compare screen, 0
{
break-if-!=
print-grapheme-to-real-screen c
break $print-grapheme:body
}
{
break-if-=
# fake screen
var screen-addr/esi: (addr screen) <- copy screen
var idx/ecx: int <- current-screen-cell-index screen-addr
var data-ah/eax: (addr handle array screen-cell) <- get screen-addr, data
var data/eax: (addr array screen-cell) <- lookup *data-ah
var offset/ecx: (offset screen-cell) <- compute-offset data, idx
var cell/eax: (addr screen-cell) <- index data, offset
var dest/eax: (addr grapheme) <- get cell, data
var c2/ecx: grapheme <- copy c
copy-to *dest, c2
}
}
}
fn current-screen-cell-index screen-on-stack: (addr screen) -> result/ecx: int {
var screen/esi: (addr screen) <- copy screen-on-stack
var cursor-row-addr/ecx: (addr int) <- get screen, cursor-row
var cursor-col-addr/eax: (addr int) <- get screen, cursor-col
result <- screen-cell-index screen, *cursor-row-addr, *cursor-col-addr
}
fn screen-cell-index screen-on-stack: (addr screen), row: int, col: int -> result/ecx: int {
var screen/esi: (addr screen) <- copy screen-on-stack
var num-cols-addr/eax: (addr int) <- get screen, num-cols
var num-cols/eax: int <- copy *num-cols-addr
result <- copy row
result <- subtract 1
result <- multiply num-cols
result <- add col
result <- subtract 1
}
fn screen-grapheme-at screen-on-stack: (addr screen), row: int, col: int -> result/eax: grapheme {
var screen-addr/esi: (addr screen) <- copy screen-on-stack
var idx/ecx: int <- screen-cell-index screen-addr, row, col
result <- screen-grapheme-at-idx screen-addr, idx
}
fn screen-grapheme-at-idx screen-on-stack: (addr screen), idx-on-stack: int -> result/eax: grapheme {
var screen-addr/esi: (addr screen) <- copy screen-on-stack
var data-ah/eax: (addr handle array screen-cell) <- get screen-addr, data
var data/eax: (addr array screen-cell) <- lookup *data-ah
var idx/ecx: int <- copy idx-on-stack
var offset/ecx: (offset screen-cell) <- compute-offset data, idx
var cell/eax: (addr screen-cell) <- index data, offset
var src/eax: (addr grapheme) <- get cell, data
result <- copy *src
}
fn print-code-point screen: (addr screen), c: code-point {
var g/eax: grapheme <- to-grapheme c
print-grapheme screen, g
}
fn print-int32-hex screen: (addr screen), n: int {
$print-int32-hex:body: {
compare screen, 0
{
break-if-!=
print-int32-hex-to-real-screen n
break $print-int32-hex:body
}
{
break-if-=
# fake screen
}
}
}
fn reset-formatting screen: (addr screen) {
$reset-formatting:body: {
compare screen, 0
{
break-if-!=
reset-formatting-on-real-screen
break $reset-formatting:body
}
{
break-if-=
# fake screen
}
}
}
fn start-color screen: (addr screen), fg: int, bg: int {
$start-color:body: {
compare screen, 0
{
break-if-!=
start-color-on-real-screen fg, bg
break $start-color:body
}
{
break-if-=
# fake screen
}
}
}
fn start-bold screen: (addr screen) {
$start-bold:body: {
compare screen, 0
{
break-if-!=
start-bold-on-real-screen
break $start-bold:body
}
{
break-if-=
# fake screen
}
}
}
fn start-underline screen: (addr screen) {
$start-underline:body: {
compare screen, 0
{
break-if-!=
start-underline-on-real-screen
break $start-underline:body
}
{
break-if-=
# fake screen
}
}
}
fn start-reverse-video screen: (addr screen) {
$start-reverse-video:body: {
compare screen, 0
{
break-if-!=
start-reverse-video-on-real-screen
break $start-reverse-video:body
}
{
break-if-=
# fake screen
}
}
}
fn start-blinking screen: (addr screen) {
$start-blinking:body: {
compare screen, 0
{
break-if-!=
start-blinking-on-real-screen
break $start-blinking:body
}
{
break-if-=
# fake screen
}
}
}
fn hide-cursor screen: (addr screen) {
$hide-cursor:body: {
compare screen, 0
{
break-if-!=
hide-cursor-on-real-screen
break $hide-cursor:body
}
{
break-if-=
# fake screen
}
}
}
fn show-cursor screen: (addr screen) {
$show-cursor:body: {
compare screen, 0
{
break-if-!=
show-cursor-on-real-screen
break $show-cursor:body
}
{
break-if-=
# fake screen
}
}
}
# validate data on screen regardless of attributes (color, bold, etc.)
# Mu doesn't have multi-line strings, so we provide functions for rows or portions of rows.
fn check-screen-row screen-on-stack: (addr screen), row-idx: int, expected: (addr array byte), msg: (addr array byte) {
var screen/esi: (addr screen) <- copy screen-on-stack
var idx/ecx: int <- screen-cell-index screen, row-idx, 1
# compare 'expected' with the screen contents starting at 'idx', grapheme by grapheme
var e: (stream byte 0x100)
var e-addr/edx: (addr stream byte) <- address e
write e-addr, expected
{
var done?/eax: boolean <- stream-empty? e-addr
compare done?, 0
break-if-!=
var g/eax: grapheme <- screen-grapheme-at-idx screen, idx
var g2/ebx: int <- copy g
var expected-grapheme/eax: grapheme <- read-grapheme e-addr
var expected-grapheme2/eax: int <- copy expected-grapheme
check-ints-equal g2, expected-grapheme2, msg
idx <- increment
loop
}
}
fn check-screen-row-from screen-on-stack: (addr screen), row-idx: int, col-idx: int, expected: (addr array byte) {
}
# various variants by screen-cell attribute; spaces in the 'expected' data should not match the attribute
fn check-screen-row-in-color screen-on-stack: (addr screen), fg: color, row-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-color-from screen-on-stack: (addr screen), fg: color, row-idx: int, col-idx: int, expected: (addr array byte) {
}
# background color is visible even for spaces, so 'expected' behaves as an array of booleans.
# non-space = given background must match; space = background must not match
fn check-screen-row-in-background-color screen-on-stack: (addr screen), fg: color, row-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-background-color-from screen-on-stack: (addr screen), fg: color, row-idx: int, col-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-bold screen-on-stack: (addr screen), row-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-bold-from screen-on-stack: (addr screen), row-idx: int, col-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-underline screen-on-stack: (addr screen), row-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-underline-from screen-on-stack: (addr screen), row-idx: int, col-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-reverse screen-on-stack: (addr screen), row-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-reverse-from screen-on-stack: (addr screen), row-idx: int, col-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-blinking screen-on-stack: (addr screen), row-idx: int, expected: (addr array byte) {
}
fn check-screen-row-in-blinking-from screen-on-stack: (addr screen), row-idx: int, col-idx: int, expected: (addr array byte) {
}
fn test-print-single-grapheme {
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4
var c/eax: grapheme <- copy 0x61 # 'a'
print-grapheme screen, c
check-screen-row screen, 1, "a", "F - test-print-single-grapheme" # top-left corner of the screen
}
fn test-print-multiple-graphemes {
var screen-on-stack: screen
var screen/esi: (addr screen) <- address screen-on-stack
initialize-screen screen, 5, 4
print-string screen, "Hello, 世界"
check-screen-row screen, 1, "Hello, 世界", "F - test-print-multiple-graphemes" # top-left corner of the screen
}
#? fn main -> exit-status/ebx: int {
#? test-print-single-grapheme
#? test-print-multiple-graphemes
#? exit-status <- copy 0
#? }
|