Fast and reasonably complete (framebuffer) terminal emulator (Zig fork)
pci.express
1/* Copyright (C) 2022-2025 mintsuki and contributors.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain the above copyright notice,
7 * this list of conditions and the following disclaimer.
8 *
9 * 2. Redistributions in binary form must reproduce the above copyright notice,
10 * this list of conditions and the following disclaimer in the documentation
11 * and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
17 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
23 * POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifdef __cplusplus
27#error "Please do not compile Flanterm as C++ code! Flanterm should be compiled as C99 or newer."
28#endif
29
30#ifndef __STDC_VERSION__
31#error "Flanterm must be compiled as C99 or newer."
32#endif
33
34#include <stdint.h>
35#include <stddef.h>
36#include <stdbool.h>
37
38#ifndef FLANTERM_IN_FLANTERM
39#define FLANTERM_IN_FLANTERM
40#endif
41
42#include "flanterm.h"
43
44// Tries to implement this standard for terminfo
45// https://man7.org/linux/man-pages/man4/console_codes.4.html
46
47static const uint32_t col256[] = {
48 0x000000, 0x00005f, 0x000087, 0x0000af, 0x0000d7, 0x0000ff, 0x005f00, 0x005f5f,
49 0x005f87, 0x005faf, 0x005fd7, 0x005fff, 0x008700, 0x00875f, 0x008787, 0x0087af,
50 0x0087d7, 0x0087ff, 0x00af00, 0x00af5f, 0x00af87, 0x00afaf, 0x00afd7, 0x00afff,
51 0x00d700, 0x00d75f, 0x00d787, 0x00d7af, 0x00d7d7, 0x00d7ff, 0x00ff00, 0x00ff5f,
52 0x00ff87, 0x00ffaf, 0x00ffd7, 0x00ffff, 0x5f0000, 0x5f005f, 0x5f0087, 0x5f00af,
53 0x5f00d7, 0x5f00ff, 0x5f5f00, 0x5f5f5f, 0x5f5f87, 0x5f5faf, 0x5f5fd7, 0x5f5fff,
54 0x5f8700, 0x5f875f, 0x5f8787, 0x5f87af, 0x5f87d7, 0x5f87ff, 0x5faf00, 0x5faf5f,
55 0x5faf87, 0x5fafaf, 0x5fafd7, 0x5fafff, 0x5fd700, 0x5fd75f, 0x5fd787, 0x5fd7af,
56 0x5fd7d7, 0x5fd7ff, 0x5fff00, 0x5fff5f, 0x5fff87, 0x5fffaf, 0x5fffd7, 0x5fffff,
57 0x870000, 0x87005f, 0x870087, 0x8700af, 0x8700d7, 0x8700ff, 0x875f00, 0x875f5f,
58 0x875f87, 0x875faf, 0x875fd7, 0x875fff, 0x878700, 0x87875f, 0x878787, 0x8787af,
59 0x8787d7, 0x8787ff, 0x87af00, 0x87af5f, 0x87af87, 0x87afaf, 0x87afd7, 0x87afff,
60 0x87d700, 0x87d75f, 0x87d787, 0x87d7af, 0x87d7d7, 0x87d7ff, 0x87ff00, 0x87ff5f,
61 0x87ff87, 0x87ffaf, 0x87ffd7, 0x87ffff, 0xaf0000, 0xaf005f, 0xaf0087, 0xaf00af,
62 0xaf00d7, 0xaf00ff, 0xaf5f00, 0xaf5f5f, 0xaf5f87, 0xaf5faf, 0xaf5fd7, 0xaf5fff,
63 0xaf8700, 0xaf875f, 0xaf8787, 0xaf87af, 0xaf87d7, 0xaf87ff, 0xafaf00, 0xafaf5f,
64 0xafaf87, 0xafafaf, 0xafafd7, 0xafafff, 0xafd700, 0xafd75f, 0xafd787, 0xafd7af,
65 0xafd7d7, 0xafd7ff, 0xafff00, 0xafff5f, 0xafff87, 0xafffaf, 0xafffd7, 0xafffff,
66 0xd70000, 0xd7005f, 0xd70087, 0xd700af, 0xd700d7, 0xd700ff, 0xd75f00, 0xd75f5f,
67 0xd75f87, 0xd75faf, 0xd75fd7, 0xd75fff, 0xd78700, 0xd7875f, 0xd78787, 0xd787af,
68 0xd787d7, 0xd787ff, 0xd7af00, 0xd7af5f, 0xd7af87, 0xd7afaf, 0xd7afd7, 0xd7afff,
69 0xd7d700, 0xd7d75f, 0xd7d787, 0xd7d7af, 0xd7d7d7, 0xd7d7ff, 0xd7ff00, 0xd7ff5f,
70 0xd7ff87, 0xd7ffaf, 0xd7ffd7, 0xd7ffff, 0xff0000, 0xff005f, 0xff0087, 0xff00af,
71 0xff00d7, 0xff00ff, 0xff5f00, 0xff5f5f, 0xff5f87, 0xff5faf, 0xff5fd7, 0xff5fff,
72 0xff8700, 0xff875f, 0xff8787, 0xff87af, 0xff87d7, 0xff87ff, 0xffaf00, 0xffaf5f,
73 0xffaf87, 0xffafaf, 0xffafd7, 0xffafff, 0xffd700, 0xffd75f, 0xffd787, 0xffd7af,
74 0xffd7d7, 0xffd7ff, 0xffff00, 0xffff5f, 0xffff87, 0xffffaf, 0xffffd7, 0xffffff,
75 0x080808, 0x121212, 0x1c1c1c, 0x262626, 0x303030, 0x3a3a3a, 0x444444, 0x4e4e4e,
76 0x585858, 0x626262, 0x6c6c6c, 0x767676, 0x808080, 0x8a8a8a, 0x949494, 0x9e9e9e,
77 0xa8a8a8, 0xb2b2b2, 0xbcbcbc, 0xc6c6c6, 0xd0d0d0, 0xdadada, 0xe4e4e4, 0xeeeeee
78};
79
80#define CHARSET_DEFAULT 0
81#define CHARSET_DEC_SPECIAL 1
82
83void flanterm_context_reinit(struct flanterm_context *ctx) {
84 ctx->tab_size = 8;
85 ctx->autoflush = true;
86 ctx->cursor_enabled = true;
87 ctx->scroll_enabled = true;
88 ctx->control_sequence = false;
89 ctx->escape = false;
90 ctx->osc = false;
91 ctx->osc_escape = false;
92 ctx->rrr = false;
93 ctx->discard_next = false;
94 ctx->bold = false;
95 ctx->bg_bold = false;
96 ctx->reverse_video = false;
97 ctx->dec_private = false;
98 ctx->insert_mode = false;
99 ctx->unicode_remaining = 0;
100 ctx->g_select = 0;
101 ctx->charsets[0] = CHARSET_DEFAULT;
102 ctx->charsets[1] = CHARSET_DEC_SPECIAL;
103 ctx->current_charset = 0;
104 ctx->escape_offset = 0;
105 ctx->esc_values_i = 0;
106 ctx->saved_cursor_x = 0;
107 ctx->saved_cursor_y = 0;
108 ctx->current_primary = (size_t)-1;
109 ctx->current_bg = (size_t)-1;
110 ctx->scroll_top_margin = 0;
111 ctx->scroll_bottom_margin = ctx->rows;
112 ctx->oob_output = FLANTERM_OOB_OUTPUT_ONLCR;
113}
114
115static void flanterm_putchar(struct flanterm_context *ctx, uint8_t c);
116
117void flanterm_write(struct flanterm_context *ctx, const char *buf, size_t count) {
118 for (size_t i = 0; i < count; i++) {
119 flanterm_putchar(ctx, buf[i]);
120 }
121
122 if (ctx->autoflush) {
123 ctx->double_buffer_flush(ctx);
124 }
125}
126
127static void sgr(struct flanterm_context *ctx) {
128 size_t i = 0;
129
130 if (!ctx->esc_values_i)
131 goto def;
132
133 for (; i < ctx->esc_values_i; i++) {
134 size_t offset;
135
136 if (ctx->esc_values[i] == 0) {
137def:
138 if (ctx->reverse_video) {
139 ctx->reverse_video = false;
140 ctx->swap_palette(ctx);
141 }
142 ctx->bold = false;
143 ctx->bg_bold = false;
144 ctx->current_primary = (size_t)-1;
145 ctx->current_bg = (size_t)-1;
146 ctx->set_text_bg_default(ctx);
147 ctx->set_text_fg_default(ctx);
148 continue;
149 }
150
151 else if (ctx->esc_values[i] == 1) {
152 ctx->bold = true;
153 if (ctx->current_primary != (size_t)-1) {
154 if (!ctx->reverse_video) {
155 ctx->set_text_fg_bright(ctx, ctx->current_primary);
156 } else {
157 ctx->set_text_bg_bright(ctx, ctx->current_primary);
158 }
159 } else {
160 if (!ctx->reverse_video) {
161 ctx->set_text_fg_default_bright(ctx);
162 } else {
163 ctx->set_text_bg_default_bright(ctx);
164 }
165 }
166 continue;
167 }
168
169 else if (ctx->esc_values[i] == 5) {
170 ctx->bg_bold = true;
171 if (ctx->current_bg != (size_t)-1) {
172 if (!ctx->reverse_video) {
173 ctx->set_text_bg_bright(ctx, ctx->current_bg);
174 } else {
175 ctx->set_text_fg_bright(ctx, ctx->current_bg);
176 }
177 } else {
178 if (!ctx->reverse_video) {
179 ctx->set_text_bg_default_bright(ctx);
180 } else {
181 ctx->set_text_fg_default_bright(ctx);
182 }
183 }
184 continue;
185 }
186
187 else if (ctx->esc_values[i] == 22) {
188 ctx->bold = false;
189 if (ctx->current_primary != (size_t)-1) {
190 if (!ctx->reverse_video) {
191 ctx->set_text_fg(ctx, ctx->current_primary);
192 } else {
193 ctx->set_text_bg(ctx, ctx->current_primary);
194 }
195 } else {
196 if (!ctx->reverse_video) {
197 ctx->set_text_fg_default(ctx);
198 } else {
199 ctx->set_text_bg_default(ctx);
200 }
201 }
202 continue;
203 }
204
205 else if (ctx->esc_values[i] == 25) {
206 ctx->bg_bold = false;
207 if (ctx->current_bg != (size_t)-1) {
208 if (!ctx->reverse_video) {
209 ctx->set_text_bg(ctx, ctx->current_bg);
210 } else {
211 ctx->set_text_fg(ctx, ctx->current_bg);
212 }
213 } else {
214 if (!ctx->reverse_video) {
215 ctx->set_text_bg_default(ctx);
216 } else {
217 ctx->set_text_fg_default(ctx);
218 }
219 }
220 continue;
221 }
222
223 else if (ctx->esc_values[i] >= 30 && ctx->esc_values[i] <= 37) {
224 offset = 30;
225 ctx->current_primary = ctx->esc_values[i] - offset;
226
227 if (ctx->reverse_video) {
228 goto set_bg;
229 }
230
231set_fg:
232 if ((ctx->bold && !ctx->reverse_video)
233 || (ctx->bg_bold && ctx->reverse_video)) {
234 ctx->set_text_fg_bright(ctx, ctx->esc_values[i] - offset);
235 } else {
236 ctx->set_text_fg(ctx, ctx->esc_values[i] - offset);
237 }
238 continue;
239 }
240
241 else if (ctx->esc_values[i] >= 40 && ctx->esc_values[i] <= 47) {
242 offset = 40;
243 ctx->current_bg = ctx->esc_values[i] - offset;
244
245 if (ctx->reverse_video) {
246 goto set_fg;
247 }
248
249set_bg:
250 if ((ctx->bold && ctx->reverse_video)
251 || (ctx->bg_bold && !ctx->reverse_video)) {
252 ctx->set_text_bg_bright(ctx, ctx->esc_values[i] - offset);
253 } else {
254 ctx->set_text_bg(ctx, ctx->esc_values[i] - offset);
255 }
256 continue;
257 }
258
259 else if (ctx->esc_values[i] >= 90 && ctx->esc_values[i] <= 97) {
260 offset = 90;
261 ctx->current_primary = ctx->esc_values[i] - offset;
262
263 if (ctx->reverse_video) {
264 goto set_bg_bright;
265 }
266
267set_fg_bright:
268 ctx->set_text_fg_bright(ctx, ctx->esc_values[i] - offset);
269 continue;
270 }
271
272 else if (ctx->esc_values[i] >= 100 && ctx->esc_values[i] <= 107) {
273 offset = 100;
274 ctx->current_bg = ctx->esc_values[i] - offset;
275
276 if (ctx->reverse_video) {
277 goto set_fg_bright;
278 }
279
280set_bg_bright:
281 ctx->set_text_bg_bright(ctx, ctx->esc_values[i] - offset);
282 continue;
283 }
284
285 else if (ctx->esc_values[i] == 39) {
286 ctx->current_primary = (size_t)-1;
287
288 if (ctx->reverse_video) {
289 ctx->swap_palette(ctx);
290 }
291
292 if (!ctx->bold) {
293 ctx->set_text_fg_default(ctx);
294 } else {
295 ctx->set_text_fg_default_bright(ctx);
296 }
297
298 if (ctx->reverse_video) {
299 ctx->swap_palette(ctx);
300 }
301
302 continue;
303 }
304
305 else if (ctx->esc_values[i] == 49) {
306 ctx->current_bg = (size_t)-1;
307
308 if (ctx->reverse_video) {
309 ctx->swap_palette(ctx);
310 }
311
312 if (!ctx->bg_bold) {
313 ctx->set_text_bg_default(ctx);
314 } else {
315 ctx->set_text_bg_default_bright(ctx);
316 }
317
318 if (ctx->reverse_video) {
319 ctx->swap_palette(ctx);
320 }
321
322 continue;
323 }
324
325 else if (ctx->esc_values[i] == 7) {
326 if (!ctx->reverse_video) {
327 ctx->reverse_video = true;
328 ctx->swap_palette(ctx);
329 }
330 continue;
331 }
332
333 else if (ctx->esc_values[i] == 27) {
334 if (ctx->reverse_video) {
335 ctx->reverse_video = false;
336 ctx->swap_palette(ctx);
337 }
338 continue;
339 }
340
341 // 256/RGB
342 else if (ctx->esc_values[i] == 38 || ctx->esc_values[i] == 48) {
343 bool fg = ctx->esc_values[i] == 38;
344
345 i++;
346 if (i >= ctx->esc_values_i) {
347 break;
348 }
349
350 switch (ctx->esc_values[i]) {
351 case 2: { // RGB
352 if (i + 3 >= ctx->esc_values_i) {
353 goto out;
354 }
355
356 uint32_t rgb_value = 0;
357
358 rgb_value |= ctx->esc_values[i + 1] << 16;
359 rgb_value |= ctx->esc_values[i + 2] << 8;
360 rgb_value |= ctx->esc_values[i + 3];
361
362 i += 3;
363
364 (fg ? ctx->set_text_fg_rgb : ctx->set_text_bg_rgb)(ctx, rgb_value);
365
366 break;
367 }
368 case 5: { // 256 colors
369 if (i + 1 >= ctx->esc_values_i) {
370 goto out;
371 }
372
373 uint32_t col = ctx->esc_values[i + 1];
374
375 i++;
376
377 if (col < 8) {
378 (fg ? ctx->set_text_fg : ctx->set_text_bg)(ctx, col);
379 } else if (col < 16) {
380 (fg ? ctx->set_text_fg_bright : ctx->set_text_bg_bright)(ctx, col - 8);
381 } else if (col < 256) {
382 uint32_t rgb_value = col256[col - 16];
383 (fg ? ctx->set_text_fg_rgb : ctx->set_text_bg_rgb)(ctx, rgb_value);
384 }
385
386 break;
387 }
388 default: continue;
389 }
390 }
391 }
392
393out:;
394}
395
396static void dec_private_parse(struct flanterm_context *ctx, uint8_t c) {
397 ctx->dec_private = false;
398
399 if (ctx->esc_values_i == 0) {
400 return;
401 }
402
403 bool set;
404
405 switch (c) {
406 case 'h':
407 set = true; break;
408 case 'l':
409 set = false; break;
410 default:
411 return;
412 }
413
414 switch (ctx->esc_values[0]) {
415 case 25: {
416 if (set) {
417 ctx->cursor_enabled = true;
418 } else {
419 ctx->cursor_enabled = false;
420 }
421 return;
422 }
423 }
424
425 if (ctx->callback != NULL) {
426 ctx->callback(ctx, FLANTERM_CB_DEC, ctx->esc_values_i, (uintptr_t)ctx->esc_values, c);
427 }
428}
429
430static void linux_private_parse(struct flanterm_context *ctx) {
431 if (ctx->esc_values_i == 0) {
432 return;
433 }
434
435 if (ctx->callback != NULL) {
436 ctx->callback(ctx, FLANTERM_CB_LINUX, ctx->esc_values_i, (uintptr_t)ctx->esc_values, 0);
437 }
438}
439
440static void mode_toggle(struct flanterm_context *ctx, uint8_t c) {
441 if (ctx->esc_values_i == 0) {
442 return;
443 }
444
445 bool set;
446
447 switch (c) {
448 case 'h':
449 set = true; break;
450 case 'l':
451 set = false; break;
452 default:
453 return;
454 }
455
456 switch (ctx->esc_values[0]) {
457 case 4:
458 ctx->insert_mode = set; return;
459 }
460
461 if (ctx->callback != NULL) {
462 ctx->callback(ctx, FLANTERM_CB_MODE, ctx->esc_values_i, (uintptr_t)ctx->esc_values, c);
463 }
464}
465
466static void osc_parse(struct flanterm_context *ctx, uint8_t c) {
467 if (ctx->osc_escape && c == '\\') {
468 goto cleanup;
469 }
470
471 ctx->osc_escape = false;
472
473 switch (c) {
474 case 0x1b:
475 ctx->osc_escape = true;
476 return;
477 case '\a':
478 default:
479 break;
480 }
481
482cleanup:
483 ctx->osc_escape = false;
484 ctx->osc = false;
485 ctx->escape = false;
486}
487
488static void control_sequence_parse(struct flanterm_context *ctx, uint8_t c) {
489 if (ctx->escape_offset == 2) {
490 switch (c) {
491 case '[':
492 ctx->discard_next = true;
493 goto cleanup;
494 case '?':
495 ctx->dec_private = true;
496 return;
497 }
498 }
499
500 if (c >= '0' && c <= '9') {
501 if (ctx->esc_values_i == FLANTERM_MAX_ESC_VALUES) {
502 return;
503 }
504 ctx->rrr = true;
505 ctx->esc_values[ctx->esc_values_i] *= 10;
506 ctx->esc_values[ctx->esc_values_i] += c - '0';
507 return;
508 }
509
510 if (ctx->rrr == true) {
511 ctx->esc_values_i++;
512 ctx->rrr = false;
513 if (c == ';')
514 return;
515 } else if (c == ';') {
516 if (ctx->esc_values_i == FLANTERM_MAX_ESC_VALUES) {
517 return;
518 }
519 ctx->esc_values[ctx->esc_values_i] = 0;
520 ctx->esc_values_i++;
521 return;
522 }
523
524 size_t esc_default;
525 switch (c) {
526 case 'J': case 'K': case 'q':
527 esc_default = 0; break;
528 default:
529 esc_default = 1; break;
530 }
531
532 for (size_t i = ctx->esc_values_i; i < FLANTERM_MAX_ESC_VALUES; i++) {
533 ctx->esc_values[i] = esc_default;
534 }
535
536 if (ctx->dec_private == true) {
537 dec_private_parse(ctx, c);
538 goto cleanup;
539 }
540
541 bool r = ctx->scroll_enabled;
542 ctx->scroll_enabled = false;
543 size_t x, y;
544 ctx->get_cursor_pos(ctx, &x, &y);
545
546 switch (c) {
547 case 'F':
548 x = 0;
549 // FALLTHRU
550 case 'A': {
551 if (ctx->esc_values[0] > y)
552 ctx->esc_values[0] = y;
553 size_t orig_y = y;
554 size_t dest_y = y - ctx->esc_values[0];
555 bool will_be_in_scroll_region = false;
556 if ((ctx->scroll_top_margin >= dest_y && ctx->scroll_top_margin <= orig_y)
557 || (ctx->scroll_bottom_margin >= dest_y && ctx->scroll_bottom_margin <= orig_y)) {
558 will_be_in_scroll_region = true;
559 }
560 if (will_be_in_scroll_region && dest_y < ctx->scroll_top_margin) {
561 dest_y = ctx->scroll_top_margin;
562 }
563 ctx->set_cursor_pos(ctx, x, dest_y);
564 break;
565 }
566 case 'E':
567 x = 0;
568 // FALLTHRU
569 case 'e':
570 case 'B': {
571 if (y + ctx->esc_values[0] > ctx->rows - 1)
572 ctx->esc_values[0] = (ctx->rows - 1) - y;
573 size_t orig_y = y;
574 size_t dest_y = y + ctx->esc_values[0];
575 bool will_be_in_scroll_region = false;
576 if ((ctx->scroll_top_margin >= orig_y && ctx->scroll_top_margin <= dest_y)
577 || (ctx->scroll_bottom_margin >= orig_y && ctx->scroll_bottom_margin <= dest_y)) {
578 will_be_in_scroll_region = true;
579 }
580 if (will_be_in_scroll_region && dest_y >= ctx->scroll_bottom_margin) {
581 dest_y = ctx->scroll_bottom_margin - 1;
582 }
583 ctx->set_cursor_pos(ctx, x, dest_y);
584 break;
585 }
586 case 'a':
587 case 'C':
588 if (x + ctx->esc_values[0] > ctx->cols - 1)
589 ctx->esc_values[0] = (ctx->cols - 1) - x;
590 ctx->set_cursor_pos(ctx, x + ctx->esc_values[0], y);
591 break;
592 case 'D':
593 if (ctx->esc_values[0] > x)
594 ctx->esc_values[0] = x;
595 ctx->set_cursor_pos(ctx, x - ctx->esc_values[0], y);
596 break;
597 case 'c':
598 if (ctx->callback != NULL) {
599 ctx->callback(ctx, FLANTERM_CB_PRIVATE_ID, 0, 0, 0);
600 }
601 break;
602 case 'd':
603 ctx->esc_values[0] -= 1;
604 if (ctx->esc_values[0] >= ctx->rows)
605 ctx->esc_values[0] = ctx->rows - 1;
606 ctx->set_cursor_pos(ctx, x, ctx->esc_values[0]);
607 break;
608 case 'G':
609 case '`':
610 ctx->esc_values[0] -= 1;
611 if (ctx->esc_values[0] >= ctx->cols)
612 ctx->esc_values[0] = ctx->cols - 1;
613 ctx->set_cursor_pos(ctx, ctx->esc_values[0], y);
614 break;
615 case 'H':
616 case 'f':
617 if (ctx->esc_values[0] != 0) {
618 ctx->esc_values[0]--;
619 }
620 if (ctx->esc_values[1] != 0) {
621 ctx->esc_values[1]--;
622 }
623 if (ctx->esc_values[1] >= ctx->cols)
624 ctx->esc_values[1] = ctx->cols - 1;
625 if (ctx->esc_values[0] >= ctx->rows)
626 ctx->esc_values[0] = ctx->rows - 1;
627 ctx->set_cursor_pos(ctx, ctx->esc_values[1], ctx->esc_values[0]);
628 break;
629 case 'M': {
630 size_t count = ctx->esc_values[0] > ctx->rows ? ctx->rows : ctx->esc_values[0];
631 for (size_t i = 0; i < count; i++) {
632 ctx->scroll(ctx);
633 }
634 break;
635 }
636 case 'L': {
637 size_t old_scroll_top_margin = ctx->scroll_top_margin;
638 ctx->scroll_top_margin = y;
639 size_t count = ctx->esc_values[0] > ctx->rows ? ctx->rows : ctx->esc_values[0];
640 for (size_t i = 0; i < count; i++) {
641 ctx->revscroll(ctx);
642 }
643 ctx->scroll_top_margin = old_scroll_top_margin;
644 break;
645 }
646 case 'n':
647 switch (ctx->esc_values[0]) {
648 case 5:
649 if (ctx->callback != NULL) {
650 ctx->callback(ctx, FLANTERM_CB_STATUS_REPORT, 0, 0, 0);
651 }
652 break;
653 case 6:
654 if (ctx->callback != NULL) {
655 ctx->callback(ctx, FLANTERM_CB_POS_REPORT, x + 1, y + 1, 0);
656 }
657 break;
658 }
659 break;
660 case 'q':
661 if (ctx->callback != NULL) {
662 ctx->callback(ctx, FLANTERM_CB_KBD_LEDS, ctx->esc_values[0], 0, 0);
663 }
664 break;
665 case 'J':
666 switch (ctx->esc_values[0]) {
667 case 0: {
668 size_t rows_remaining = ctx->rows - (y + 1);
669 size_t cols_diff = ctx->cols - (x + 1);
670 size_t to_clear = rows_remaining * ctx->cols + cols_diff + 1;
671 for (size_t i = 0; i < to_clear; i++) {
672 ctx->raw_putchar(ctx, ' ');
673 }
674 ctx->set_cursor_pos(ctx, x, y);
675 break;
676 }
677 case 1: {
678 ctx->set_cursor_pos(ctx, 0, 0);
679 bool b = false;
680 for (size_t yc = 0; yc < ctx->rows; yc++) {
681 for (size_t xc = 0; xc < ctx->cols; xc++) {
682 ctx->raw_putchar(ctx, ' ');
683 if (xc == x && yc == y) {
684 ctx->set_cursor_pos(ctx, x, y);
685 b = true;
686 break;
687 }
688 }
689 if (b == true)
690 break;
691 }
692 break;
693 }
694 case 2:
695 case 3:
696 ctx->clear(ctx, false);
697 break;
698 }
699 break;
700 case '@':
701 for (size_t i = ctx->cols - 1; ; i--) {
702 ctx->move_character(ctx, i + ctx->esc_values[0], y, i, y);
703 ctx->set_cursor_pos(ctx, i, y);
704 ctx->raw_putchar(ctx, ' ');
705 if (i == x) {
706 break;
707 }
708 }
709 ctx->set_cursor_pos(ctx, x, y);
710 break;
711 case 'P':
712 for (size_t i = x + ctx->esc_values[0]; i < ctx->cols; i++)
713 ctx->move_character(ctx, i - ctx->esc_values[0], y, i, y);
714 ctx->set_cursor_pos(ctx, ctx->cols - ctx->esc_values[0], y);
715 // FALLTHRU
716 case 'X': {
717 size_t count = ctx->esc_values[0] > ctx->cols ? ctx->cols : ctx->esc_values[0];
718 for (size_t i = 0; i < count; i++)
719 ctx->raw_putchar(ctx, ' ');
720 ctx->set_cursor_pos(ctx, x, y);
721 break;
722 }
723 case 'm':
724 sgr(ctx);
725 break;
726 case 's':
727 ctx->get_cursor_pos(ctx, &ctx->saved_cursor_x, &ctx->saved_cursor_y);
728 break;
729 case 'u':
730 ctx->set_cursor_pos(ctx, ctx->saved_cursor_x, ctx->saved_cursor_y);
731 break;
732 case 'K':
733 switch (ctx->esc_values[0]) {
734 case 0: {
735 for (size_t i = x; i < ctx->cols; i++)
736 ctx->raw_putchar(ctx, ' ');
737 ctx->set_cursor_pos(ctx, x, y);
738 break;
739 }
740 case 1: {
741 ctx->set_cursor_pos(ctx, 0, y);
742 for (size_t i = 0; i < x; i++)
743 ctx->raw_putchar(ctx, ' ');
744 break;
745 }
746 case 2: {
747 ctx->set_cursor_pos(ctx, 0, y);
748 for (size_t i = 0; i < ctx->cols; i++)
749 ctx->raw_putchar(ctx, ' ');
750 ctx->set_cursor_pos(ctx, x, y);
751 break;
752 }
753 }
754 break;
755 case 'r':
756 if (ctx->esc_values[0] == 0) {
757 ctx->esc_values[0] = 1;
758 }
759 if (ctx->esc_values[1] == 0) {
760 ctx->esc_values[1] = 1;
761 }
762 ctx->scroll_top_margin = 0;
763 ctx->scroll_bottom_margin = ctx->rows;
764 if (ctx->esc_values_i > 0) {
765 ctx->scroll_top_margin = ctx->esc_values[0] - 1;
766 }
767 if (ctx->esc_values_i > 1) {
768 ctx->scroll_bottom_margin = ctx->esc_values[1];
769 }
770 if (ctx->scroll_top_margin >= ctx->rows
771 || ctx->scroll_bottom_margin > ctx->rows
772 || ctx->scroll_top_margin >= (ctx->scroll_bottom_margin - 1)) {
773 ctx->scroll_top_margin = 0;
774 ctx->scroll_bottom_margin = ctx->rows;
775 }
776 ctx->set_cursor_pos(ctx, 0, 0);
777 break;
778 case 'l':
779 case 'h':
780 mode_toggle(ctx, c);
781 break;
782 case ']':
783 linux_private_parse(ctx);
784 break;
785 }
786
787 ctx->scroll_enabled = r;
788
789cleanup:
790 ctx->control_sequence = false;
791 ctx->escape = false;
792}
793
794static void restore_state(struct flanterm_context *ctx) {
795 ctx->bold = ctx->saved_state_bold;
796 ctx->bg_bold = ctx->saved_state_bg_bold;
797 ctx->reverse_video = ctx->saved_state_reverse_video;
798 ctx->current_charset = ctx->saved_state_current_charset;
799 ctx->current_primary = ctx->saved_state_current_primary;
800 ctx->current_bg = ctx->saved_state_current_bg;
801
802 ctx->restore_state(ctx);
803}
804
805static void save_state(struct flanterm_context *ctx) {
806 ctx->save_state(ctx);
807
808 ctx->saved_state_bold = ctx->bold;
809 ctx->saved_state_bg_bold = ctx->bg_bold;
810 ctx->saved_state_reverse_video = ctx->reverse_video;
811 ctx->saved_state_current_charset = ctx->current_charset;
812 ctx->saved_state_current_primary = ctx->current_primary;
813 ctx->saved_state_current_bg = ctx->current_bg;
814}
815
816static void escape_parse(struct flanterm_context *ctx, uint8_t c) {
817 ctx->escape_offset++;
818
819 if (ctx->osc == true) {
820 osc_parse(ctx, c);
821 return;
822 }
823
824 if (ctx->control_sequence == true) {
825 control_sequence_parse(ctx, c);
826 return;
827 }
828
829 size_t x, y;
830 ctx->get_cursor_pos(ctx, &x, &y);
831
832 switch (c) {
833 case ']':
834 ctx->osc_escape = false;
835 ctx->osc = true;
836 return;
837 case '[':
838 for (size_t i = 0; i < FLANTERM_MAX_ESC_VALUES; i++)
839 ctx->esc_values[i] = 0;
840 ctx->esc_values_i = 0;
841 ctx->rrr = false;
842 ctx->control_sequence = true;
843 return;
844 case '7':
845 save_state(ctx);
846 break;
847 case '8':
848 restore_state(ctx);
849 break;
850 case 'c':
851 flanterm_context_reinit(ctx);
852 ctx->clear(ctx, true);
853 break;
854 case 'D':
855 if (y == ctx->scroll_bottom_margin - 1) {
856 ctx->scroll(ctx);
857 ctx->set_cursor_pos(ctx, x, y);
858 } else {
859 ctx->set_cursor_pos(ctx, x, y + 1);
860 }
861 break;
862 case 'E':
863 if (y == ctx->scroll_bottom_margin - 1) {
864 ctx->scroll(ctx);
865 ctx->set_cursor_pos(ctx, 0, y);
866 } else {
867 ctx->set_cursor_pos(ctx, 0, y + 1);
868 }
869 break;
870 case 'M':
871 // "Reverse linefeed"
872 if (y == ctx->scroll_top_margin) {
873 ctx->revscroll(ctx);
874 ctx->set_cursor_pos(ctx, 0, y);
875 } else {
876 ctx->set_cursor_pos(ctx, 0, y - 1);
877 }
878 break;
879 case 'Z':
880 if (ctx->callback != NULL) {
881 ctx->callback(ctx, FLANTERM_CB_PRIVATE_ID, 0, 0, 0);
882 }
883 break;
884 case '(':
885 case ')':
886 ctx->g_select = c - '\'';
887 break;
888 }
889
890 ctx->escape = false;
891}
892
893static bool dec_special_print(struct flanterm_context *ctx, uint8_t c) {
894#define FLANTERM_DEC_SPCL_PRN(C) ctx->raw_putchar(ctx, (C)); return true;
895 switch (c) {
896 case '`': FLANTERM_DEC_SPCL_PRN(0x04)
897 case '0': FLANTERM_DEC_SPCL_PRN(0xdb)
898 case '-': FLANTERM_DEC_SPCL_PRN(0x18)
899 case ',': FLANTERM_DEC_SPCL_PRN(0x1b)
900 case '.': FLANTERM_DEC_SPCL_PRN(0x19)
901 case 'a': FLANTERM_DEC_SPCL_PRN(0xb1)
902 case 'f': FLANTERM_DEC_SPCL_PRN(0xf8)
903 case 'g': FLANTERM_DEC_SPCL_PRN(0xf1)
904 case 'h': FLANTERM_DEC_SPCL_PRN(0xb0)
905 case 'j': FLANTERM_DEC_SPCL_PRN(0xd9)
906 case 'k': FLANTERM_DEC_SPCL_PRN(0xbf)
907 case 'l': FLANTERM_DEC_SPCL_PRN(0xda)
908 case 'm': FLANTERM_DEC_SPCL_PRN(0xc0)
909 case 'n': FLANTERM_DEC_SPCL_PRN(0xc5)
910 case 'q': FLANTERM_DEC_SPCL_PRN(0xc4)
911 case 's': FLANTERM_DEC_SPCL_PRN(0x5f)
912 case 't': FLANTERM_DEC_SPCL_PRN(0xc3)
913 case 'u': FLANTERM_DEC_SPCL_PRN(0xb4)
914 case 'v': FLANTERM_DEC_SPCL_PRN(0xc1)
915 case 'w': FLANTERM_DEC_SPCL_PRN(0xc2)
916 case 'x': FLANTERM_DEC_SPCL_PRN(0xb3)
917 case 'y': FLANTERM_DEC_SPCL_PRN(0xf3)
918 case 'z': FLANTERM_DEC_SPCL_PRN(0xf2)
919 case '~': FLANTERM_DEC_SPCL_PRN(0xfa)
920 case '_': FLANTERM_DEC_SPCL_PRN(0xff)
921 case '+': FLANTERM_DEC_SPCL_PRN(0x1a)
922 case '{': FLANTERM_DEC_SPCL_PRN(0xe3)
923 case '}': FLANTERM_DEC_SPCL_PRN(0x9c)
924 }
925#undef FLANTERM_DEC_SPCL_PRN
926
927 return false;
928}
929
930// Following wcwidth related code inherited from:
931// https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
932
933struct interval {
934 uint32_t first;
935 uint32_t last;
936};
937
938/* auxiliary function for binary search in interval table */
939static int bisearch(uint32_t ucs, const struct interval *table, int max) {
940 int min = 0;
941 int mid;
942
943 if (ucs < table[0].first || ucs > table[max].last)
944 return 0;
945 while (max >= min) {
946 mid = (min + max) / 2;
947 if (ucs > table[mid].last)
948 min = mid + 1;
949 else if (ucs < table[mid].first)
950 max = mid - 1;
951 else
952 return 1;
953 }
954
955 return 0;
956}
957
958int mk_wcwidth(uint32_t ucs) {
959 /* sorted list of non-overlapping intervals of non-spacing characters */
960 /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
961 static const struct interval combining[] = {
962 { 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 },
963 { 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 },
964 { 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 },
965 { 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 },
966 { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED },
967 { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A },
968 { 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 },
969 { 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D },
970 { 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 },
971 { 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD },
972 { 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C },
973 { 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D },
974 { 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC },
975 { 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD },
976 { 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C },
977 { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D },
978 { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 },
979 { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 },
980 { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC },
981 { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD },
982 { 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D },
983 { 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 },
984 { 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E },
985 { 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC },
986 { 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 },
987 { 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E },
988 { 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 },
989 { 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 },
990 { 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 },
991 { 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F },
992 { 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 },
993 { 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD },
994 { 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD },
995 { 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 },
996 { 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B },
997 { 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 },
998 { 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 },
999 { 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF },
1000 { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 },
1001 { 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F },
1002 { 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B },
1003 { 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F },
1004 { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB },
1005 { 0x10A01, 0x10A03 }, { 0x10A05, 0x10A06 }, { 0x10A0C, 0x10A0F },
1006 { 0x10A38, 0x10A3A }, { 0x10A3F, 0x10A3F }, { 0x1D167, 0x1D169 },
1007 { 0x1D173, 0x1D182 }, { 0x1D185, 0x1D18B }, { 0x1D1AA, 0x1D1AD },
1008 { 0x1D242, 0x1D244 }, { 0xE0001, 0xE0001 }, { 0xE0020, 0xE007F },
1009 { 0xE0100, 0xE01EF }
1010 };
1011
1012 /* test for 8-bit control characters */
1013 if (ucs == 0)
1014 return 0;
1015 if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
1016 return 1;
1017
1018 /* binary search in table of non-spacing characters */
1019 if (bisearch(ucs, combining,
1020 sizeof(combining) / sizeof(struct interval) - 1))
1021 return 0;
1022
1023 /* if we arrive here, ucs is not a combining or C0/C1 control character */
1024
1025 return 1 +
1026 (ucs >= 0x1100 &&
1027 (ucs <= 0x115f || /* Hangul Jamo init. consonants */
1028 ucs == 0x2329 || ucs == 0x232a ||
1029 (ucs >= 0x2e80 && ucs <= 0xa4cf &&
1030 ucs != 0x303f) || /* CJK ... Yi */
1031 (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */
1032 (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */
1033 (ucs >= 0xfe10 && ucs <= 0xfe19) || /* Vertical forms */
1034 (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */
1035 (ucs >= 0xff00 && ucs <= 0xff60) || /* Fullwidth Forms */
1036 (ucs >= 0xffe0 && ucs <= 0xffe6) ||
1037 (ucs >= 0x20000 && ucs <= 0x2fffd) ||
1038 (ucs >= 0x30000 && ucs <= 0x3fffd)));
1039}
1040
1041// End of https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c inherited code
1042
1043static int unicode_to_cp437(uint64_t code_point) {
1044 switch (code_point) {
1045 case 0x263a: return 1;
1046 case 0x263b: return 2;
1047 case 0x2665: return 3;
1048 case 0x2666: return 4;
1049 case 0x2663: return 5;
1050 case 0x2660: return 6;
1051 case 0x2022: return 7;
1052 case 0x25d8: return 8;
1053 case 0x25cb: return 9;
1054 case 0x25d9: return 10;
1055 case 0x2642: return 11;
1056 case 0x2640: return 12;
1057 case 0x266a: return 13;
1058 case 0x266b: return 14;
1059 case 0x263c: return 15;
1060 case 0x25ba: return 16;
1061 case 0x25c4: return 17;
1062 case 0x2195: return 18;
1063 case 0x203c: return 19;
1064 case 0x00b6: return 20;
1065 case 0x00a7: return 21;
1066 case 0x25ac: return 22;
1067 case 0x21a8: return 23;
1068 case 0x2191: return 24;
1069 case 0x2193: return 25;
1070 case 0x2192: return 26;
1071 case 0x2190: return 27;
1072 case 0x221f: return 28;
1073 case 0x2194: return 29;
1074 case 0x25b2: return 30;
1075 case 0x25bc: return 31;
1076
1077 case 0x2302: return 127;
1078 case 0x00c7: return 128;
1079 case 0x00fc: return 129;
1080 case 0x00e9: return 130;
1081 case 0x00e2: return 131;
1082 case 0x00e4: return 132;
1083 case 0x00e0: return 133;
1084 case 0x00e5: return 134;
1085 case 0x00e7: return 135;
1086 case 0x00ea: return 136;
1087 case 0x00eb: return 137;
1088 case 0x00e8: return 138;
1089 case 0x00ef: return 139;
1090 case 0x00ee: return 140;
1091 case 0x00ec: return 141;
1092 case 0x00c4: return 142;
1093 case 0x00c5: return 143;
1094 case 0x00c9: return 144;
1095 case 0x00e6: return 145;
1096 case 0x00c6: return 146;
1097 case 0x00f4: return 147;
1098 case 0x00f6: return 148;
1099 case 0x00f2: return 149;
1100 case 0x00fb: return 150;
1101 case 0x00f9: return 151;
1102 case 0x00ff: return 152;
1103 case 0x00d6: return 153;
1104 case 0x00dc: return 154;
1105 case 0x00a2: return 155;
1106 case 0x00a3: return 156;
1107 case 0x00a5: return 157;
1108 case 0x20a7: return 158;
1109 case 0x0192: return 159;
1110 case 0x00e1: return 160;
1111 case 0x00ed: return 161;
1112 case 0x00f3: return 162;
1113 case 0x00fa: return 163;
1114 case 0x00f1: return 164;
1115 case 0x00d1: return 165;
1116 case 0x00aa: return 166;
1117 case 0x00ba: return 167;
1118 case 0x00bf: return 168;
1119 case 0x2310: return 169;
1120 case 0x00ac: return 170;
1121 case 0x00bd: return 171;
1122 case 0x00bc: return 172;
1123 case 0x00a1: return 173;
1124 case 0x00ab: return 174;
1125 case 0x00bb: return 175;
1126 case 0x2591: return 176;
1127 case 0x2592: return 177;
1128 case 0x2593: return 178;
1129 case 0x2502: return 179;
1130 case 0x2524: return 180;
1131 case 0x2561: return 181;
1132 case 0x2562: return 182;
1133 case 0x2556: return 183;
1134 case 0x2555: return 184;
1135 case 0x2563: return 185;
1136 case 0x2551: return 186;
1137 case 0x2557: return 187;
1138 case 0x255d: return 188;
1139 case 0x255c: return 189;
1140 case 0x255b: return 190;
1141 case 0x2510: return 191;
1142 case 0x2514: return 192;
1143 case 0x2534: return 193;
1144 case 0x252c: return 194;
1145 case 0x251c: return 195;
1146 case 0x2500: return 196;
1147 case 0x253c: return 197;
1148 case 0x255e: return 198;
1149 case 0x255f: return 199;
1150 case 0x255a: return 200;
1151 case 0x2554: return 201;
1152 case 0x2569: return 202;
1153 case 0x2566: return 203;
1154 case 0x2560: return 204;
1155 case 0x2550: return 205;
1156 case 0x256c: return 206;
1157 case 0x2567: return 207;
1158 case 0x2568: return 208;
1159 case 0x2564: return 209;
1160 case 0x2565: return 210;
1161 case 0x2559: return 211;
1162 case 0x2558: return 212;
1163 case 0x2552: return 213;
1164 case 0x2553: return 214;
1165 case 0x256b: return 215;
1166 case 0x256a: return 216;
1167 case 0x2518: return 217;
1168 case 0x250c: return 218;
1169 case 0x2588: return 219;
1170 case 0x2584: return 220;
1171 case 0x258c: return 221;
1172 case 0x2590: return 222;
1173 case 0x2580: return 223;
1174 case 0x03b1: return 224;
1175 case 0x00df: return 225;
1176 case 0x0393: return 226;
1177 case 0x03c0: return 227;
1178 case 0x03a3: return 228;
1179 case 0x03c3: return 229;
1180 case 0x00b5: return 230;
1181 case 0x03c4: return 231;
1182 case 0x03a6: return 232;
1183 case 0x0398: return 233;
1184 case 0x03a9: return 234;
1185 case 0x03b4: return 235;
1186 case 0x221e: return 236;
1187 case 0x03c6: return 237;
1188 case 0x03b5: return 238;
1189 case 0x2229: return 239;
1190 case 0x2261: return 240;
1191 case 0x00b1: return 241;
1192 case 0x2265: return 242;
1193 case 0x2264: return 243;
1194 case 0x2320: return 244;
1195 case 0x2321: return 245;
1196 case 0x00f7: return 246;
1197 case 0x2248: return 247;
1198 case 0x00b0: return 248;
1199 case 0x2219: return 249;
1200 case 0x00b7: return 250;
1201 case 0x221a: return 251;
1202 case 0x207f: return 252;
1203 case 0x00b2: return 253;
1204 case 0x25a0: return 254;
1205 }
1206
1207 return -1;
1208}
1209
1210static void flanterm_putchar(struct flanterm_context *ctx, uint8_t c) {
1211 if (ctx->discard_next || (c == 0x18 || c == 0x1a)) {
1212 ctx->discard_next = false;
1213 ctx->escape = false;
1214 ctx->control_sequence = false;
1215 ctx->unicode_remaining = 0;
1216 ctx->osc = false;
1217 ctx->osc_escape = false;
1218 ctx->g_select = 0;
1219 return;
1220 }
1221
1222 if (ctx->unicode_remaining != 0) {
1223 if ((c & 0xc0) != 0x80) {
1224 ctx->unicode_remaining = 0;
1225 goto unicode_error;
1226 }
1227
1228 ctx->unicode_remaining--;
1229 ctx->code_point |= (uint64_t)(c & 0x3f) << (6 * ctx->unicode_remaining);
1230 if (ctx->unicode_remaining != 0) {
1231 return;
1232 }
1233
1234 int cc = unicode_to_cp437(ctx->code_point);
1235
1236 if (cc == -1) {
1237 size_t replacement_width = (size_t)mk_wcwidth(ctx->code_point);
1238 if (replacement_width > 0) {
1239 ctx->raw_putchar(ctx, 0xfe);
1240 }
1241 for (size_t i = 1; i < replacement_width; i++) {
1242 ctx->raw_putchar(ctx, ' ');
1243 }
1244 } else {
1245 ctx->raw_putchar(ctx, cc);
1246 }
1247 return;
1248 }
1249
1250unicode_error:
1251 if (c >= 0xc0 && c <= 0xf7) {
1252 if (c >= 0xc0 && c <= 0xdf) {
1253 ctx->unicode_remaining = 1;
1254 ctx->code_point = (uint64_t)(c & 0x1f) << 6;
1255 } else if (c >= 0xe0 && c <= 0xef) {
1256 ctx->unicode_remaining = 2;
1257 ctx->code_point = (uint64_t)(c & 0x0f) << (6 * 2);
1258 } else if (c >= 0xf0 && c <= 0xf7) {
1259 ctx->unicode_remaining = 3;
1260 ctx->code_point = (uint64_t)(c & 0x07) << (6 * 3);
1261 }
1262 return;
1263 }
1264
1265 if (ctx->escape == true) {
1266 escape_parse(ctx, c);
1267 return;
1268 }
1269
1270 if (ctx->g_select) {
1271 ctx->g_select--;
1272 switch (c) {
1273 case 'B':
1274 ctx->charsets[ctx->g_select] = CHARSET_DEFAULT; break;
1275 case '0':
1276 ctx->charsets[ctx->g_select] = CHARSET_DEC_SPECIAL; break;
1277 }
1278 ctx->g_select = 0;
1279 return;
1280 }
1281
1282 size_t x, y;
1283 ctx->get_cursor_pos(ctx, &x, &y);
1284
1285 switch (c) {
1286 case 0x00:
1287 case 0x7f:
1288 return;
1289 case 0x1b:
1290 ctx->escape_offset = 0;
1291 ctx->escape = true;
1292 return;
1293 case '\t':
1294 if ((x / ctx->tab_size + 1) >= ctx->cols) {
1295 ctx->set_cursor_pos(ctx, ctx->cols - 1, y);
1296 return;
1297 }
1298 ctx->set_cursor_pos(ctx, (x / ctx->tab_size + 1) * ctx->tab_size, y);
1299 return;
1300 case 0x0b:
1301 case 0x0c:
1302 case '\n':
1303 if (y == ctx->scroll_bottom_margin - 1) {
1304 ctx->scroll(ctx);
1305 ctx->set_cursor_pos(ctx, (ctx->oob_output & FLANTERM_OOB_OUTPUT_ONLCR) ? 0 : x, y);
1306 } else {
1307 ctx->set_cursor_pos(ctx, (ctx->oob_output & FLANTERM_OOB_OUTPUT_ONLCR) ? 0 : x, y + 1);
1308 }
1309 return;
1310 case '\b':
1311 ctx->set_cursor_pos(ctx, x - 1, y);
1312 return;
1313 case '\r':
1314 ctx->set_cursor_pos(ctx, 0, y);
1315 return;
1316 case '\a':
1317 // The bell is handled by the kernel
1318 if (ctx->callback != NULL) {
1319 ctx->callback(ctx, FLANTERM_CB_BELL, 0, 0, 0);
1320 }
1321 return;
1322 case 14:
1323 // Move to G1 set
1324 ctx->current_charset = 1;
1325 return;
1326 case 15:
1327 // Move to G0 set
1328 ctx->current_charset = 0;
1329 return;
1330 }
1331
1332 if (ctx->insert_mode == true) {
1333 for (size_t i = ctx->cols - 1; ; i--) {
1334 ctx->move_character(ctx, i + 1, y, i, y);
1335 if (i == x) {
1336 break;
1337 }
1338 }
1339 }
1340
1341 // Translate character set
1342 switch (ctx->charsets[ctx->current_charset]) {
1343 case CHARSET_DEFAULT:
1344 break;
1345 case CHARSET_DEC_SPECIAL:
1346 if (dec_special_print(ctx, c)) {
1347 return;
1348 }
1349 break;
1350 }
1351
1352 if (c >= 0x20 && c <= 0x7e) {
1353 ctx->raw_putchar(ctx, c);
1354 } else {
1355 ctx->raw_putchar(ctx, 0xfe);
1356 }
1357}
1358
1359void flanterm_flush(struct flanterm_context *ctx) {
1360 ctx->double_buffer_flush(ctx);
1361}
1362
1363void flanterm_full_refresh(struct flanterm_context *ctx) {
1364 ctx->full_refresh(ctx);
1365}
1366
1367void flanterm_deinit(struct flanterm_context *ctx, void (*_free)(void *, size_t)) {
1368 ctx->deinit(ctx, _free);
1369}
1370
1371void flanterm_get_dimensions(struct flanterm_context *ctx, size_t *cols, size_t *rows) {
1372 *cols = ctx->cols;
1373 *rows = ctx->rows;
1374}
1375
1376void flanterm_set_autoflush(struct flanterm_context *ctx, bool state) {
1377 ctx->autoflush = state;
1378}
1379
1380void flanterm_set_callback(struct flanterm_context *ctx, void (*callback)(struct flanterm_context *, uint64_t, uint64_t, uint64_t, uint64_t)) {
1381 ctx->callback = callback;
1382}
1383
1384uint64_t flanterm_get_oob_output(struct flanterm_context *ctx) {
1385 return ctx->oob_output;
1386}
1387
1388void flanterm_set_oob_output(struct flanterm_context *ctx, uint64_t oob_output) {
1389 ctx->oob_output = oob_output;
1390}