-
Notifications
You must be signed in to change notification settings - Fork 3
/
a2m.c
598 lines (479 loc) · 11.5 KB
/
a2m.c
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
/* Copyright (c) 2018 Trollforge. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Trollforge's name may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*/
#include <ctype.h>
#include <errno.h>
#include <iconv.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <getopt.h>
#ifndef DEBUG
#define DEBUG 0
#else
#define DEBUG 1
#endif /* DEBUG */
#define DPRINTF(fmt, ...) if (DEBUG) do { \
fprintf(stderr, fmt, ##__VA_ARGS__); \
} while (0)
#define DEFAULT_FG 7
#define DEFAULT_BG 0
#define DEFAULT_BOLD false
#define DEFAULT_ICE false
#define MAX_PARAMS 16
/* 4 bytes + '\0' */
#define MAX_UTFSTR 5
typedef struct cell_s {
char *utfchar;
int fg;
int bg;
bool bold;
bool ice;
} cell_t;
typedef struct canvas_s {
cell_t **cell; /* canvas state */
char fg;
char bg;
bool bold;
bool ice;
int row; /* cursor state */
int col;
int bottomrow;
int oldrow;
int oldcol;
int max_cols; /* options */
bool use_color;
bool show_unp;
int tab_size;
int lcrop;
int rcrop;
int default_fg;
int default_bg;
} canvas_t;
int get_fgcolor(cell_t *cell);
int get_bgcolor(cell_t *cell);
void print_color(canvas_t *c, cell_t *cell, int col);
void inc_row(canvas_t *c);
void draw_cell(canvas_t *c, char *inch, int fg, int bg, bool bold, bool ice);
void usage(void);
/* lol globals */
/*
* ANSI COLORS BLK RED GRN YEL BLU MAG CYN WHT
* 0 1 2 3 4 5 6 7
*/
const char color[8] = { 1, 5, 3, 7, 2, 6, 10, 15 };
const char color_bold[8] = { 14, 4, 9, 8, 12, 13, 11, 0 };
int main(int argc, char *argv[]) {
int opt;
FILE *fd;
canvas_t *c;
c = (canvas_t *)calloc(1, sizeof(canvas_t));
c->fg = DEFAULT_FG;
c->bg = DEFAULT_BG;
c->bold = false;
c->ice = false;
c->row = -1;
c->col = 0;
c->bottomrow = -1;
c->oldrow = 0;
c->oldcol = 0;
c->max_cols = 80;
c->use_color = true;
c->show_unp = false;
c->tab_size = 8;
c->lcrop = 0;
c->rcrop = 0;
c->default_fg = 7;
c->default_bg = 0;
while((opt = getopt(argc, argv, "npl:r:w:t:")) != -1) {
switch(opt) {
case 'n':
c->use_color = false;
break;
case 'p':
c->show_unp = true;
break;
case 'l':
c->lcrop = atoi(optarg);
break;
case 'r':
c->rcrop = atoi(optarg);
break;
case 'w':
c->max_cols = atoi(optarg);
break;
case 't':
c->tab_size = atoi(optarg);
break;
case '?':
/* fallthrough */
case 'h':
/* fallthrough */
default:
usage();
}
}
argc -= optind;
argv += optind;
/* init the first line */
inc_row(c);
fd = NULL;
if (argc == 1)
fd = fopen(argv[0], "r");
else if (argc == 0)
fd = stdin;
else {
usage();
}
if (!fd) {
perror(NULL);
exit(EX_NOINPUT);
}
char *charp = malloc(1);
if (!charp) {
perror(NULL);
exit(EX_OSERR);
}
char *space = " ";
int rc = 0;
int pcnt = 0;
int param[MAX_PARAMS];
uint32_t ch = 0;
while ((ch = fgetc(fd)) != EOF) {
/* ignore sauce record */
if (ch == 0x1a)
break;
/* drawable character */
if (ch != 0x1b) {
*charp = (char)ch;
/* convert tabs to spaces */
if (ch == '\t')
for (int i = 0; i < c->tab_size; i++)
draw_cell(c, space, c->fg, c->bg, c->bold, c->ice);
else if (ch == '\0')
draw_cell(c, space, DEFAULT_FG, DEFAULT_BG, c->bold, c->ice);
else if (ch != '\r' && ch != '\n')
draw_cell(c, charp, c->fg, c->bg, c->bold, c->ice);
if (ch == '\n')
while (c->col != 0)
draw_cell(c, space, c->fg, c->bg, c->bold, c->ice);
/* escape code */
} else {
rc = 0;
pcnt = 0;
/* no rational way to recover tbqh imho */
if ((ch = fgetc(fd)) != '[') {
DPRINTF("Invalid escape code, aborting at line %d\n", c->row + 1);
exit(EX_DATAERR);
}
while ((ch = fgetc(fd)) != EOF) {
/* parameters */
if (isdigit(ch)) {
*charp = (char)ch;
rc = (rc * 10) + atoi(charp);
/* oddball parameter prefixes */
} else if (ch == '?' || ch == '=' || ch == '>') {
/* just eat them for now */
/* end of parameter, havent encountered ':' but its legit */
} else if (ch == ';' || ch == ':') {
param[pcnt] = rc;
rc = 0;
pcnt++;
/* spacing */
} else if (ch == 'C') {
/* default to one space */
if (rc == 0)
rc = 1;
for (int i = 0; i < rc; i++) {
draw_cell(c, space, DEFAULT_FG, DEFAULT_BG,
DEFAULT_BOLD, DEFAULT_ICE);
}
rc = 0;
pcnt = 0;
break;
/* SGR sequence */
} else if (ch == 'm') {
param[pcnt] = rc;
pcnt++;
for (int i = 0; i < pcnt; i++) {
/* reset */
if (param[i] == 0) {
c->bold = false;
c->ice = false;
c->fg = DEFAULT_FG;
c->bg = DEFAULT_BG;
} else if (param[i] == 1)
c->bold = true;
else if (param[i] == 5)
c->ice = true;
else if (param[i] == 21 || param[i] == 22)
c->bold = false;
else if (param[i] == 25)
c->ice = false;
else if (param[i] >= 30 && param[i] <= 37)
c->fg = param[i] - 30;
else if (param[i] >= 90 && param[i] <= 97) {
c->fg = param[i] - 90;
c->bold = true;
}
else if (param[i] >= 40 && param[i] <= 47)
c->bg = param[i] - 40;
else if (param[i] == 39)
c->fg = DEFAULT_FG;
else if (param[i] == 49)
c->bg = DEFAULT_BG;
else
DPRINTF("Ignored SGR parameter %d at line %d\n", param[i], c->row + 1);
}
rc = 0;
pcnt = 0;
break;
/* clear screen */
/* todo flesh this out */
} else if (ch == 'J') {
c->row = 0;
c->col = 0;
for (int i = 0; i <= c->bottomrow; i++) {
for (int j = 0; j < c->max_cols; j++) {
c->cell[i][j].fg = DEFAULT_FG;
c->cell[i][j].bg = DEFAULT_BG;
c->cell[i][j].bold = DEFAULT_BOLD;
c->cell[i][j].ice = DEFAULT_ICE;
if (c->cell[i][j].utfchar)
free(c->cell[i][j].utfchar);
}
}
rc = 0;
pcnt = 0;
break;
/* move up */
} else if (ch == 'A') {
/* default is 1 */
if (rc == 0)
rc = 1;
while (rc > 0) {
/* found an ansi that tried this */
/* probably from a bbs prelogin that assumed */
/* frontdoor was eating the first few lines */
if (c->row == 0)
break;
c->row--;
rc--;
}
rc = 0;
pcnt = 0;
break;
/* move down */
} else if (ch == 'B') {
if (rc == 0)
rc = 1;
while (rc > 0) {
inc_row(c);
rc--;
}
rc = 0;
pcnt = 0;
break;
/* move forward */
} else if (ch == 'C') {
if (rc == 0)
rc = 1;
while (rc > 0) {
if (c->col == c->max_cols - 1)
break;
c->col++;
rc--;
}
rc = 0;
pcnt = 0;
break;
/* move back */
} else if (ch == 'D') {
if (rc == 0)
rc = 1;
while (rc > 0) {
if (c->col == 0)
break;
c->col--;
rc--;
}
rc = 0;
pcnt = 0;
break;
/* goto */
/* todo add check for inc_row */
} else if (ch == 'f' || ch == 'H') {
if (pcnt != 2) {
break;
}
c->row = param[0];
c->col = param[1];
rc = 0;
pcnt = 0;
break;
/* set mode */
} else if (ch == 'h' || ch == 'n') {
rc = 0;
pcnt = 0;
break;
/* save position */
} else if (ch == 's') {
c->oldrow = c->row;
c->oldcol = c->col;
rc = 0;
pcnt = 0;
break;
/* restore position */
} else if (ch == 'u') {
c->row = c->oldrow;
c->col = c->oldcol;
rc = 0;
pcnt = 0;
break;
/* sequences we dont care and/or know about */
} else {
DPRINTF("Ignored escape code [");
for (int i = 0; i < pcnt; i++)
DPRINTF("%d%s", param[pcnt], i + 1 < pcnt ? ";" : "");
DPRINTF("0x%02x at line %d col %d\n", ch, c->row + 1, c->col + 1);
rc = 0;
pcnt = 0;
break;
}
}
}
}
for (int i = 0; i <= c->row; i++) {
for (int j = c->lcrop; j < c->max_cols - c->rcrop; j++) {
cell_t *cell = &c->cell[i][j];
if (!cell->utfchar) {
printf("\n");
return (0);
}
if (c->use_color)
print_color(c, cell, j);
printf("%s", cell->utfchar);
}
printf("\n");
}
if (argc == 1)
fclose(fd);
return (0);
}
void
usage(void)
{
fprintf(stderr, "usage: a2m [options] [input.ans]\n");
fprintf(stderr, "\n");
fprintf(stderr, " -l n Crop n lines from the left side.\n");
fprintf(stderr, " -r n Crop n lines from the right side.\n");
fprintf(stderr, " -n Disable color output.\n");
fprintf(stderr, " -p Print unprintable characters.\n");
fprintf(stderr, " -t size Specify tab size, default is 8.\n");
fprintf(stderr, " -w width Specify width, default is 80.\n");
exit(EX_USAGE);
}
int
get_fgcolor(cell_t *cell)
{
return (cell->bold ? color_bold[cell->fg] : color[cell->fg]);
}
int
get_bgcolor(cell_t *cell)
{
return (cell->ice ? color_bold[cell->bg] : color[cell->bg]);
}
void
print_color(canvas_t *c, cell_t *cell, int col)
{
static cell_t *prev = NULL;
int oldfg = (!prev || col == c->lcrop) ? DEFAULT_FG : prev->fg;
int oldbg = (!prev || col == c->lcrop) ? DEFAULT_BG : prev->bg;
int oldbold = (!prev || col == c->lcrop) ? DEFAULT_BOLD : prev->bold;
int oldice = (!prev || col == c->lcrop) ? DEFAULT_ICE : prev->ice;
if (cell->fg != oldfg || cell->bg != oldbg || cell->bold != oldbold || cell->ice != oldice) {
printf("\x03");
printf("%d", get_fgcolor(cell));
if (cell->bg != oldbg || (cell->ice != oldice))
printf(",%d", get_bgcolor(cell));
}
prev = cell;
return;
}
void
inc_row(canvas_t *c)
{
cell_t **newrows;
c->row++;
if (c->row <= c->bottomrow)
return;
c->bottomrow = c->row;
newrows = (cell_t **)calloc(c->row + 1, sizeof(cell_t *));
if (!newrows) {
perror(NULL);
exit(EX_OSERR);
}
for (int i = 0; i < c->row; i++)
newrows[i] = c->cell[i];
newrows[c->row] = (cell_t *)calloc(c->max_cols, sizeof(cell_t));
free(c->cell);
c->cell = newrows;
for (int j = 0; j < c->max_cols; j++) {
c->cell[c->row][j].fg = DEFAULT_FG;
c->cell[c->row][j].bg = DEFAULT_BG;
c->cell[c->row][j].bold = DEFAULT_BOLD;
c->cell[c->row][j].ice = DEFAULT_ICE;
}
return;
}
void
draw_cell(canvas_t *c, char *inch, int fg, int bg, bool bold, bool ice)
{
static iconv_t conv = (iconv_t)0;
char *outchp;
char *oldoutchp;
outchp = calloc(1, MAX_UTFSTR);
if (!outchp) {
perror(NULL);
exit(EX_OSERR);
}
oldoutchp = outchp;
if ((unsigned char)inch[0] < 32 && !c->show_unp)
inch[0] = ' ';
size_t inchsize = 1;
size_t outchsize = MAX_UTFSTR;
if (!conv)
conv = iconv_open("UTF-8", "CP437");
iconv(conv, &inch, &inchsize, &outchp, &outchsize);
c->cell[c->row][c->col].utfchar = calloc(1, MAX_UTFSTR);
if (!c->cell[c->row][c->col].utfchar) {
perror(NULL);
exit(EX_OSERR);
}
strcpy(c->cell[c->row][c->col].utfchar, oldoutchp);
free(oldoutchp);
c->cell[c->row][c->col].fg = fg;
c->cell[c->row][c->col].bg = bg;
c->cell[c->row][c->col].bold = bold;
c->cell[c->row][c->col].ice = ice;
c->col++;
if (c->col == c->max_cols) {
inc_row(c);
c->col = 0;
}
return;
}