termcap.c revision 1.14 1 /* $NetBSD: termcap.c,v 1.14 2011/03/18 10:42:54 roy Exp $ */
2
3 /*
4 * Copyright (c) 2009 The NetBSD Foundation, Inc.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Roy Marples.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __RCSID("$NetBSD: termcap.c,v 1.14 2011/03/18 10:42:54 roy Exp $");
32
33 #include <assert.h>
34 #include <ctype.h>
35 #include <errno.h>
36 #include <stdint.h>
37 #include <string.h>
38 #include <term_private.h>
39 #include <term.h>
40 #include <termcap.h>
41 #include <unistd.h>
42 #include <stdio.h>
43
44 #include "termcap_map.c"
45 #include "termcap_hash.c"
46
47 char *UP;
48 char *BC;
49
50 /* ARGSUSED */
51 int
52 tgetent(__unused char *bp, const char *name)
53 {
54 int errret;
55 static TERMINAL *last = NULL;
56
57 _DIAGASSERT(name != NULL);
58
59 /* Free the old term */
60 if (last != NULL) {
61 del_curterm(last);
62 last = NULL;
63 }
64 errret = -1;
65 if (setupterm(name, STDOUT_FILENO, &errret) != 0)
66 return errret;
67 last = cur_term;
68
69 if (pad_char != NULL)
70 PC = pad_char[0];
71 UP = __UNCONST(cursor_up);
72 BC = __UNCONST(cursor_left);
73 return 1;
74 }
75
76 int
77 tgetflag(const char *id)
78 {
79 uint32_t ind;
80 size_t i;
81 TERMUSERDEF *ud;
82
83 _DIAGASSERT(id != NULL);
84
85 if (cur_term == NULL)
86 return 0;
87
88 ind = _t_flaghash((const unsigned char *)id, strlen(id));
89 if (ind <= __arraycount(_ti_cap_flagids)) {
90 if (strcmp(id, _ti_cap_flagids[ind].id) == 0)
91 return cur_term->flags[_ti_cap_flagids[ind].ti];
92 }
93 for (i = 0; i < cur_term->_nuserdefs; i++) {
94 ud = &cur_term->_userdefs[i];
95 if (ud->type == 'f' && strcmp(ud->id, id) == 0)
96 return ud->flag;
97 }
98 return 0;
99 }
100
101 int
102 tgetnum(const char *id)
103 {
104 uint32_t ind;
105 size_t i;
106 TERMUSERDEF *ud;
107 const TENTRY *te;
108
109 _DIAGASSERT(id != NULL);
110
111 if (cur_term == NULL)
112 return -1;
113
114 ind = _t_numhash((const unsigned char *)id, strlen(id));
115 if (ind <= __arraycount(_ti_cap_numids)) {
116 te = &_ti_cap_numids[ind];
117 if (strcmp(id, te->id) == 0) {
118 if (!VALID_NUMERIC(cur_term->nums[te->ti]))
119 return ABSENT_NUMERIC;
120 return cur_term->nums[te->ti];
121 }
122 }
123 for (i = 0; i < cur_term->_nuserdefs; i++) {
124 ud = &cur_term->_userdefs[i];
125 if (ud->type == 'n' && strcmp(ud->id, id) == 0) {
126 if (!VALID_NUMERIC(ud->num))
127 return ABSENT_NUMERIC;
128 return ud->num;
129 }
130 }
131 return -1;
132 }
133
134 char *
135 tgetstr(const char *id, char **area)
136 {
137 uint32_t ind;
138 size_t i;
139 TERMUSERDEF *ud;
140 const char *str;
141
142 _DIAGASSERT(id != NULL);
143
144 if (cur_term == NULL)
145 return NULL;
146
147 str = NULL;
148 ind = _t_strhash((const unsigned char *)id, strlen(id));
149 if (ind <= __arraycount(_ti_cap_strids)) {
150 if (strcmp(id, _ti_cap_strids[ind].id) == 0) {
151 str = cur_term->strs[_ti_cap_strids[ind].ti];
152 if (str == NULL)
153 return NULL;
154 }
155 }
156 if (str != NULL)
157 for (i = 0; i < cur_term->_nuserdefs; i++) {
158 ud = &cur_term->_userdefs[i];
159 if (ud->type == 's' && strcmp(ud->id, id) == 0)
160 str = ud->str;
161 }
162
163 /* XXX: FXIXME
164 * We should fix sgr0(me) as it has a slightly different meaning
165 * for termcap. */
166
167 if (str != NULL && area != NULL && *area != NULL) {
168 char *s;
169 s = *area;
170 strcpy(*area, str);
171 *area += strlen(*area) + 1;
172 return s;
173 }
174
175 return __UNCONST(str);
176 }
177
178 char *
179 tgoto(const char *cm, int destcol, int destline)
180 {
181 _DIAGASSERT(cm != NULL);
182 return vtparm(cm, destline, destcol);
183 }
184
185 static const char *
186 flagname(const char *key)
187 {
188 uint32_t idx;
189
190 idx = _t_flaghash((const unsigned char *)key, strlen(key));
191 if (idx <= __arraycount(_ti_cap_flagids) &&
192 strcmp(key, _ti_cap_flagids[idx].id) == 0)
193 return _ti_flagid(_ti_cap_flagids[idx].ti);
194 return key;
195 }
196
197 static const char *
198 numname(const char *key)
199 {
200 uint32_t idx;
201
202 idx = _t_numhash((const unsigned char *)key, strlen(key));
203 if (idx <= __arraycount(_ti_cap_numids) &&
204 strcmp(key, _ti_cap_numids[idx].id) == 0)
205 return _ti_numid(_ti_cap_numids[idx].ti);
206 return key;
207 }
208
209 static const char *
210 strname(const char *key)
211 {
212 uint32_t idx;
213
214 idx = _t_strhash((const unsigned char *)key, strlen(key));
215 if (idx <= __arraycount(_ti_cap_strids) &&
216 strcmp(key, _ti_cap_strids[idx].id) == 0)
217 return _ti_strid(_ti_cap_strids[idx].ti);
218
219 if (strcmp(key, "tc") == 0)
220 return "use";
221
222 return key;
223 }
224
225 /* Print a parameter if needed */
226 static int
227 printparam(char **dst, char p, int *nop)
228 {
229 if (*nop != 0) {
230 *nop = 0;
231 return 0;
232 }
233
234 *(*dst)++ = '%';
235 *(*dst)++ = 'p';
236 *(*dst)++ = '0' + p;
237 return 3;
238 }
239
240 /* Convert a termcap character into terminfo equivalents */
241 static int
242 printchar(char **dst, const char **src)
243 {
244 unsigned char v;
245 int l;
246
247 l = 4;
248 v = (unsigned char) *++(*src);
249 if (v == '\\') {
250 v = (unsigned char) *++(*src);
251 switch (v) {
252 case '0':
253 case '1':
254 case '2':
255 case '3':
256 v = 0;
257 while (isdigit((unsigned char) **src))
258 v = 8 * v + ((unsigned char) *(*src)++ - '0');
259 (*src)--;
260 break;
261 case '\0':
262 v = '\\';
263 break;
264 }
265 } else if (v == '^')
266 v = (unsigned char) (*++(*src) & 0x1f);
267 *(*dst)++ = '%';
268 if (isgraph(v) && v != ',' && v != '\'' && v != '\\' && v != ':') {
269 *(*dst)++ = '\'';
270 *(*dst)++ = v;
271 *(*dst)++ = '\'';
272 } else {
273 *(*dst)++ = '{';
274 if (v > 99) {
275 *(*dst)++ = '0'+ v / 100;
276 l++;
277 }
278 if (v > 9) {
279 *(*dst)++ = '0' + ((int) (v / 10)) % 10;
280 l++;
281 }
282 *(*dst)++ = '0' + v % 10;
283 *(*dst)++ = '}';
284 }
285 return l;
286 }
287
288 /* Convert termcap commands into terminfo commands */
289 static const char fmtB[] = "%p0%{10}%/%{16}%*%p0%{10}%m%+";
290 static const char fmtD[] = "%p0%p0%{2}%*%-";
291 static const char fmtIf[] = "%p0%p0%?";
292 static const char fmtThen[] = "%>%t";
293 static const char fmtElse[] = "%+%;";
294
295 static char *
296 strval(const char *val)
297 {
298 char *info, *ip, c;
299 const char *ps, *pe;
300 int p, nop;
301 size_t len, l;
302
303 len = 1024; /* no single string should be bigger */
304 info = ip = malloc(len);
305 if (info == NULL)
306 return 0;
307
308 /* Move the = */
309 *ip++ = *val++;
310
311 /* Set ps and pe to point to the start and end of the padding */
312 if (isdigit((unsigned char)*val)) {
313 for (ps = pe = val;
314 isdigit((unsigned char)*val) || *val == '.';
315 val++)
316 pe++;
317 if (*val == '*') {
318 val++;
319 pe++;
320 }
321 } else
322 ps = pe = NULL;
323
324 l = nop = 0;
325 p = 1;
326 for (; *val != '\0'; val++) {
327 if (l + 2 > len)
328 goto elen;
329 if (*val != '%') {
330 if (*val == ',') {
331 if (l + 3 > len)
332 goto elen;
333 *ip++ = '\\';
334 l++;
335 }
336 *ip++ = *val;
337 l++;
338 continue;
339 }
340 switch (c = *++(val)) {
341 case 'B':
342 if (l + sizeof(fmtB) > len)
343 goto elen;
344 memcpy(ip, fmtB, sizeof(fmtB) - 1);
345 /* Replace the embedded parameters with real ones */
346 ip[2] += p;
347 ip[19] += p;
348 ip += sizeof(fmtB) - 1;
349 l += sizeof(fmtB) - 1;
350 nop = 1;
351 continue;
352 case 'D':
353 if (l + sizeof(fmtD) > len)
354 goto elen;
355 memcpy(ip, fmtD, sizeof(fmtD) - 1);
356 /* Replace the embedded parameters with real ones */
357 ip[2] += p;
358 ip[5] += p;
359 ip += sizeof(fmtD) - 1;
360 l += sizeof(fmtD) - 1;
361 nop = 1;
362 continue;
363 case 'r':
364 /* non op as switched below */
365 break;
366 case '2': /* FALLTHROUGH */
367 case '3': /* FALLTHROUGH */
368 case 'd':
369 if (l + 7 > len)
370 goto elen;
371 l += printparam(&ip, p, &nop);
372 *ip++ = '%';
373 if (c != 'd') {
374 *ip++ = c;
375 l++;
376 }
377 *ip++ = 'd';
378 l += 2;
379 break;
380 case '+':
381 if (l + 13 > len)
382 goto elen;
383 l += printparam(&ip, p, &nop);
384 l += printchar(&ip, &val);
385 *ip++ = '%';
386 *ip++ = c;
387 *ip++ = '%';
388 *ip++ = 'c';
389 l += 7;
390 break;
391 case '>':
392 if (l + sizeof(fmtIf) + sizeof(fmtThen) +
393 sizeof(fmtElse) + (6 * 2) > len)
394 goto elen;
395
396 memcpy(ip, fmtIf, sizeof(fmtIf) - 1);
397 /* Replace the embedded parameters with real ones */
398 ip[2] += p;
399 ip[5] += p;
400 ip += sizeof(fmtIf) - 1;
401 l += sizeof(fmtIf) - 1;
402 l += printchar(&ip, &val);
403 memcpy(ip, fmtThen, sizeof(fmtThen) - 1);
404 ip += sizeof(fmtThen) - 1;
405 l += sizeof(fmtThen) - 1;
406 l += printchar(&ip, &val);
407 memcpy(ip, fmtElse, sizeof(fmtElse) - 1);
408 ip += sizeof(fmtElse) - 1;
409 l += sizeof(fmtElse) - 1;
410 l += 16;
411 nop = 1;
412 continue;
413 case '.':
414 if (l + 6 > len)
415 goto elen;
416 l += printparam(&ip, p, &nop);
417 *ip++ = '%';
418 *ip++ = 'c';
419 l += 2;
420 break;
421 default:
422 /* Hope it matches a terminfo command. */
423 *ip++ = '%';
424 *ip++ = c;
425 l += 2;
426 if (c == 'i')
427 continue;
428 break;
429 }
430 /* Swap p1 and p2 */
431 p = 3 - p;
432 }
433
434 /* \E\ is valid termcap.
435 * We need to escape the final \ for terminfo. */
436 if (l > 2 && info[l - 1] == '\\' &&
437 (info[l - 2] != '\\' && info[l - 2] != '^'))
438 {
439 if (l + 1 > len)
440 goto elen;
441 *ip++ = '\\';
442 }
443
444 /* Add our padding at the end. */
445 if (ps != NULL) {
446 size_t n = pe - ps;
447 if (l + n + 4 > len)
448 goto elen;
449 *ip++ = '$';
450 *ip++ = '<';
451 strncpy(ip, ps, n);
452 ip += n;
453 *ip++ = '/';
454 *ip++ = '>';
455 }
456
457 *ip = '\0';
458 return info;
459
460 elen:
461 free(info);
462 errno = ENOMEM;
463 return NULL;
464 }
465
466 typedef struct {
467 const char *name;
468 const char *cap;
469 } DEF_INFO;
470
471 static DEF_INFO def_infos[] = {
472 { "bel", "^G" },
473 { "cr", "^M" },
474 { "cud1", "^J" },
475 { "ht", "^I" },
476 { "ind", "^J" },
477 { "kbs", "^H" },
478 { "kcub1", "^H" },
479 { "kcud1", "^J" },
480 { "nel", "^M^J" }
481 };
482
483 char *
484 captoinfo(char *cap)
485 {
486 char *info, *ip, *token, *val, *p, tok[3];
487 const char *name;
488 size_t len, lp, nl, vl, rl;
489 int defs[__arraycount(def_infos)], fv;
490
491 _DIAGASSERT(cap != NULL);
492
493 len = strlen(cap) * 2;
494 len += __arraycount(def_infos) * (5 + 4 + 3); /* reserve for defs */
495 info = ip = malloc(len);
496 if (info == NULL)
497 return NULL;
498
499 memset(defs, 0, sizeof(defs));
500 lp = 0;
501 tok[2] = '\0';
502 for (token = _ti_get_token(&cap, ':');
503 token != NULL;
504 token = _ti_get_token(&cap, ':'))
505 {
506 if (token[0] == '\0')
507 continue;
508 name = token;
509 val = p = NULL;
510 fv = nl = 0;
511 if (token[1] != '\0') {
512 tok[0] = token[0];
513 tok[1] = token[1];
514 nl = 1;
515 if (token[2] == '\0') {
516 name = flagname(tok);
517 val = NULL;
518 } else if (token[2] == '#') {
519 name = numname(tok);
520 val = token + 2;
521 } else if (token[2] == '=') {
522 name = strname(tok);
523 val = strval(token + 2);
524 fv = 1;
525 } else
526 nl = 0;
527 }
528 /* If not matched we may need to convert padding still. */
529 if (nl == 0) {
530 p = strchr(name, '=');
531 if (p != NULL) {
532 val = strval(p);
533 *p = '\0';
534 fv = 1;
535 }
536 }
537
538 /* See if this sets a default. */
539 for (nl = 0; nl < __arraycount(def_infos); nl++) {
540 if (strcmp(name, def_infos[nl].name) == 0) {
541 defs[nl] = 1;
542 break;
543 }
544 }
545
546 nl = strlen(name);
547 if (val == NULL)
548 vl = 0;
549 else
550 vl = strlen(val);
551 rl = nl + vl + 3; /* , \0 */
552
553 if (lp + rl > len) {
554 if (rl < 256)
555 len += 256;
556 else
557 len += rl;
558 p = realloc(info, len);
559 if (p == NULL)
560 return NULL;
561 info = p;
562 }
563
564 if (ip != info) {
565 *ip++ = ',';
566 *ip++ = ' ';
567 }
568
569 strcpy(ip, name);
570 ip += nl;
571 if (val != NULL) {
572 strcpy(ip, val);
573 ip += vl;
574 if (fv == 1)
575 free(val);
576 }
577 }
578
579 /* Add any defaults not set above. */
580 for (nl = 0; nl < __arraycount(def_infos); nl++) {
581 if (defs[nl] == 0) {
582 *ip++ = ',';
583 *ip++ = ' ';
584 strcpy(ip, def_infos[nl].name);
585 ip += strlen(def_infos[nl].name);
586 *ip++ = '=';
587 strcpy(ip, def_infos[nl].cap);
588 ip += strlen(def_infos[nl].cap);
589 }
590 }
591
592 *ip = '\0';
593 return info;
594 }
595
596