xref: /netbsd/lib/libterminfo/termcap.c (revision 6550d01e) 
1 /* $NetBSD: termcap.c,v 1.10 2010/10/12 12:49:27 christos 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 1.10 2010/10/12 12:49:27 christos 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 
182 	_DIAGASSERT(cm != NULL);
183 	return vtparm(cm, destline, destcol);
184 }
185 
186 static const char *
187 flagname(const char *key)
188 {
189 	uint32_t idx;
190 
191 	idx = _t_flaghash((const unsigned char *)key, strlen(key));
192 	if (idx <= __arraycount(_ti_cap_flagids) &&
193 	    strcmp(key, _ti_cap_flagids[idx].id) == 0)
194 		return _ti_flagid(_ti_cap_flagids[idx].ti);
195 	return key;
196 }
197 
198 static const char *
199 numname(const char *key)
200 {
201 	uint32_t idx;
202 
203 	idx = _t_numhash((const unsigned char *)key, strlen(key));
204 	if (idx <= __arraycount(_ti_cap_numids) &&
205 	    strcmp(key, _ti_cap_numids[idx].id) == 0)
206 		return _ti_numid(_ti_cap_numids[idx].ti);
207 	return key;
208 }
209 
210 static const char *
211 strname(const char *key)
212 {
213 	uint32_t idx;
214 
215 	idx = _t_strhash((const unsigned char *)key, strlen(key));
216 	if (idx <= __arraycount(_ti_cap_strids) &&
217 	    strcmp(key, _ti_cap_strids[idx].id) == 0)
218 		return _ti_strid(_ti_cap_strids[idx].ti);
219 
220 	if (strcmp(key, "tc") == 0)
221 		return "use";
222 
223 	return key;
224 }
225 
226 /* We don't currently map %> %B %D
227  * That means no conversion for regent100, hz1500, act4, act5, mime terms. */
228 static char *
229 strval(const char *val)
230 {
231 	char *info, *ip, c;
232 	const char *ps, *pe;
233 	int p;
234 	size_t len, l;
235 
236 	len = 1024; /* no single string should be bigger */
237 	info = ip = malloc(len);
238 	if (info == NULL)
239 		return 0;
240 
241 	/* Move the = */
242 	*ip++ = *val++;
243 
244 	/* Set ps and pe to point to the start and end of the padding */
245 	if (isdigit((unsigned char)*val)) {
246 		for (ps = pe = val;
247 		     isdigit((unsigned char)*val) || *val == '.';
248 		     val++)
249 			pe++;
250 		if (*val == '*') {
251 			val++;
252 			pe++;
253 		}
254 	} else
255 		ps = pe  = NULL;
256 
257 	l = 0;
258 	p = 1;
259 	for (; *val != '\0'; val++) {
260 		if (l + 2 > len)
261 			goto elen;
262 		if (*val != '%') {
263 			if (*val == ',') {
264 				if (l + 3 > len)
265 					goto elen;
266 				*ip++ = '\\';
267 				l++;
268 			}
269 			*ip++ = *val;
270 			l++;
271 			continue;
272 		}
273 		switch (c = *(++val)) {
274 		case 'd':
275 			if (l + 6 > len)
276 				goto elen;
277 			*ip++ = '%';
278 			*ip++ = 'p';
279 			*ip++ = '0' + p;
280 			*ip++ = '%';
281 			*ip++ = 'd';
282 			l += 5;
283 			/* FALLTHROUGH */
284 		case 'r':
285 			p = 3 - p;
286 			break;
287 		default:
288 			/* Hope it matches a terminfo command. */
289 			*ip++ = '%';
290 			*ip++ = c;
291 			l += 2;
292 			break;
293 		}
294 	}
295 
296 	/* \E\ is valid termcap.
297 	 * We need to escape the final \ for terminfo. */
298 	if (l > 2 && info[l - 1] == '\\' &&
299 	    (info[l - 2] != '\\' && info[l - 2] != '^'))
300 	{
301 		if (l + 1 > len)
302 			goto elen;
303 		*ip++ = '\\';
304 	}
305 
306 	/* Add our padding at the end. */
307 	if (ps != NULL) {
308 		size_t n = pe - ps;
309 		if (l + n + 4 > len)
310 			goto elen;
311 		*ip++ = '$';
312 		*ip++ = '<';
313 		strncpy(ip, ps, n);
314 		ip += n;
315 		*ip++ = '/';
316 		*ip++ = '>';
317 	}
318 
319 	*ip = '\0';
320 	return info;
321 
322 elen:
323 	free(info);
324 	errno = ENOMEM;
325 	return NULL;
326 }
327 
328 typedef struct {
329 	const char *name;
330 	const char *cap;
331 } DEF_INFO;
332 
333 static DEF_INFO def_infos[] = {
334 	{ "bel",	"^G" },
335 	{ "cr",		"^M" },
336 	{ "cud1",	"^J" },
337 	{ "ht",		"^I" },
338 	{ "ind",	"^J" },
339 	{ "kbs",	"^H" },
340 	{ "kcub1",	"^H" },
341 	{ "kcud1",	"^J" },
342 	{ "nel",	"^M^J" }
343 };
344 
345 char *
346 captoinfo(char *cap)
347 {
348 	char *info, *ip, *token, *val, *p, tok[3];
349 	const char *name;
350 	size_t len, lp, nl, vl, rl;
351 	int defs[__arraycount(def_infos)], fv;
352 
353 	_DIAGASSERT(cap != NULL);
354 
355 	len = strlen(cap) * 2;
356 	len += __arraycount(def_infos) * (5 + 4 + 3); /* reserve for defs */
357 	info = ip = malloc(len);
358 	if (info == NULL)
359 		return NULL;
360 
361 	memset(defs, 0, sizeof(defs));
362 	lp = 0;
363 	tok[2] = '\0';
364 	for (token = _ti_get_token(&cap, ':');
365 	     token != NULL;
366 	     token = _ti_get_token(&cap, ':'))
367 	{
368 		if (token[0] == '\0')
369 			continue;
370 		name = token;
371 		val = p = NULL;
372 		fv = nl = 0;
373 		if (token[1] != '\0') {
374 			tok[0] = token[0];
375 			tok[1] = token[1];
376 			nl = 1;
377 			if (token[2] == '\0') {
378 				name = flagname(tok);
379 				val = NULL;
380 			} else if (token[2] == '#') {
381 				name = numname(tok);
382 				val = token + 2;
383 			} else if (token[2] == '=') {
384 				name = strname(tok);
385 				val = strval(token + 2);
386 				fv = 1;
387 			} else
388 				nl = 0;
389 		}
390 		/* If not matched we may need to convert padding still. */
391 		if (nl == 0) {
392 			p = strchr(name, '=');
393 			if (p != NULL) {
394 				val = strval(p);
395 				*p = '\0';
396 				fv = 1;
397 			}
398 		}
399 
400 		/* See if this sets a default. */
401 		for (nl = 0; nl < __arraycount(def_infos); nl++) {
402 			if (strcmp(name, def_infos[nl].name) == 0) {
403 				defs[nl] = 1;
404 				break;
405 			}
406 		}
407 
408 		nl = strlen(name);
409 		if (val == NULL)
410 			vl = 0;
411 		else
412 			vl = strlen(val);
413 		rl = nl + vl + 3; /* , \0 */
414 
415 		if (lp + rl > len) {
416 			if (rl < 256)
417 				len += 256;
418 			else
419 				len += rl;
420 			p = realloc(info, len);
421 			if (p == NULL)
422 				return NULL;
423 			info = p;
424 		}
425 
426 		if (ip != info) {
427 			*ip++ = ',';
428 			*ip++ = ' ';
429 		}
430 
431 		strcpy(ip, name);
432 		ip += nl;
433 		if (val != NULL) {
434 			strcpy(ip, val);
435 			ip += vl;
436 			if (fv == 1)
437 				free(val);
438 		}
439 	}
440 
441 	/* Add any defaults not set above. */
442 	for (nl = 0; nl < __arraycount(def_infos); nl++) {
443 		if (defs[nl] == 0) {
444 			*ip++ = ',';
445 			*ip++ = ' ';
446 			strcpy(ip, def_infos[nl].name);
447 			ip += strlen(def_infos[nl].name);
448 			*ip++ = '=';
449 			strcpy(ip, def_infos[nl].cap);
450 			ip += strlen(def_infos[nl].cap);
451 		}
452 	}
453 
454 	*ip = '\0';
455 	return info;
456 }
457 
458