compile.c revision 1.11 
1/* $NetBSD: compile.c,v 1.11 2017/02/11 15:13:17 roy Exp $ */
2
3/*
4 * Copyright (c) 2009, 2010, 2011 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#if HAVE_NBTOOL_CONFIG_H
31#include "nbtool_config.h"
32#endif
33
34#include <sys/cdefs.h>
35__RCSID("$NetBSD: compile.c,v 1.11 2017/02/11 15:13:17 roy Exp $");
36
37#if !HAVE_NBTOOL_CONFIG_H || HAVE_SYS_ENDIAN_H
38#include <sys/endian.h>
39#endif
40
41#include <assert.h>
42#include <ctype.h>
43#include <err.h>
44#include <errno.h>
45#include <limits.h>
46#include <stdarg.h>
47#include <stdlib.h>
48#include <stdint.h>
49#include <stdio.h>
50#include <string.h>
51#include <term_private.h>
52#include <term.h>
53
54static void __printflike(2, 3)
55dowarn(int flags, const char *fmt, ...)
56{
57	va_list va;
58
59	errno = EINVAL;
60	if (flags & TIC_WARNING) {
61		va_start(va, fmt);
62		vwarnx(fmt, va);
63		va_end(va);
64	}
65}
66
67char *
68_ti_grow_tbuf(TBUF *tbuf, size_t len)
69{
70	char *buf;
71	size_t l;
72
73	_DIAGASSERT(tbuf != NULL);
74
75	l = tbuf->bufpos + len;
76	if (l > tbuf->buflen) {
77		if (tbuf->buflen == 0)
78			buf = malloc(l);
79		else
80			buf = realloc(tbuf->buf, l);
81		if (buf == NULL)
82			return NULL;
83		tbuf->buf = buf;
84		tbuf->buflen = l;
85	}
86	return tbuf->buf;
87}
88
89char *
90_ti_find_cap(TBUF *tbuf, char type, short ind)
91{
92	size_t n;
93	short num;
94	char *cap;
95
96	_DIAGASSERT(tbuf != NULL);
97
98	cap = tbuf->buf;
99	for (n = tbuf->entries; n > 0; n--) {
100		num = le16dec(cap);
101		cap += sizeof(uint16_t);
102		if (num == ind)
103			return cap;
104		switch (type) {
105		case 'f':
106			cap++;
107			break;
108		case 'n':
109			cap += sizeof(uint16_t);
110			break;
111		case 's':
112			num = le16dec(cap);
113			cap += sizeof(uint16_t);
114			cap += num;
115			break;
116		}
117	}
118
119	errno = ESRCH;
120	return NULL;
121}
122
123char *
124_ti_find_extra(TBUF *tbuf, const char *code)
125{
126	size_t n;
127	short num;
128	char *cap;
129
130	_DIAGASSERT(tbuf != NULL);
131	_DIAGASSERT(code != NULL);
132
133	cap = tbuf->buf;
134	for (n = tbuf->entries; n > 0; n--) {
135		num = le16dec(cap);
136		cap += sizeof(uint16_t);
137		if (strcmp(cap, code) == 0)
138			return cap + num;
139		cap += num;
140		switch (*cap++) {
141		case 'f':
142			cap++;
143			break;
144		case 'n':
145			cap += sizeof(uint16_t);
146			break;
147		case 's':
148			num = le16dec(cap);
149			cap += sizeof(uint16_t);
150			cap += num;
151			break;
152		}
153	}
154
155	errno = ESRCH;
156	return NULL;
157}
158
159size_t
160_ti_store_extra(TIC *tic, int wrn, char *id, char type, char flag, short num,
161    char *str, size_t strl, int flags)
162{
163	size_t l;
164
165	_DIAGASSERT(tic != NULL);
166
167	if (strcmp(id, "use") != 0) {
168		if (_ti_find_extra(&tic->extras, id) != NULL)
169			return 0;
170		if (!(flags & TIC_EXTRA)) {
171			if (wrn != 0)
172				dowarn(flags, "%s: %s: unknown capability",
173				    tic->name, id);
174			return 0;
175		}
176	}
177
178	l = strlen(id) + 1;
179	if (l > UINT16_T_MAX) {
180		dowarn(flags, "%s: %s: cap name is too long", tic->name, id);
181		return 0;
182	}
183
184	if (!_ti_grow_tbuf(&tic->extras,
185		l + strl + (sizeof(uint16_t) * 2) + 1))
186		return 0;
187	le16enc(tic->extras.buf + tic->extras.bufpos, l);
188	tic->extras.bufpos += sizeof(uint16_t);
189	memcpy(tic->extras.buf + tic->extras.bufpos, id, l);
190	tic->extras.bufpos += l;
191	tic->extras.buf[tic->extras.bufpos++] = type;
192	switch (type) {
193	case 'f':
194		tic->extras.buf[tic->extras.bufpos++] = flag;
195		break;
196	case 'n':
197		le16enc(tic->extras.buf + tic->extras.bufpos, num);
198		tic->extras.bufpos += sizeof(uint16_t);
199		break;
200	case 's':
201		le16enc(tic->extras.buf + tic->extras.bufpos, strl);
202		tic->extras.bufpos += sizeof(uint16_t);
203		memcpy(tic->extras.buf + tic->extras.bufpos, str, strl);
204		tic->extras.bufpos += strl;
205		break;
206	}
207	tic->extras.entries++;
208	return 1;
209}
210
211ssize_t
212_ti_flatten(uint8_t **buf, const TIC *tic)
213{
214	size_t buflen, len, alen, dlen;
215	uint8_t *cap;
216
217	_DIAGASSERT(buf != NULL);
218	_DIAGASSERT(tic != NULL);
219
220	len = strlen(tic->name) + 1;
221	if (tic->alias == NULL)
222		alen = 0;
223	else
224		alen = strlen(tic->alias) + 1;
225	if (tic->desc == NULL)
226		dlen = 0;
227	else
228		dlen = strlen(tic->desc) + 1;
229	buflen = sizeof(char) +
230	    sizeof(uint16_t) + len +
231	    sizeof(uint16_t) + alen +
232	    sizeof(uint16_t) + dlen +
233	    (sizeof(uint16_t) * 2) + tic->flags.bufpos +
234	    (sizeof(uint16_t) * 2) + tic->nums.bufpos +
235	    (sizeof(uint16_t) * 2) + tic->strs.bufpos +
236	    (sizeof(uint16_t) * 2) + tic->extras.bufpos;
237	*buf = malloc(buflen);
238	if (*buf == NULL)
239		return -1;
240
241	cap = *buf;
242	*cap++ = 1;
243	le16enc(cap, len);
244	cap += sizeof(uint16_t);
245	memcpy(cap, tic->name, len);
246	cap += len;
247
248	le16enc(cap, alen);
249	cap += sizeof(uint16_t);
250	if (tic->alias != NULL) {
251		memcpy(cap, tic->alias, alen);
252		cap += alen;
253	}
254	le16enc(cap, dlen);
255	cap += sizeof(uint16_t);
256	if (tic->desc != NULL) {
257		memcpy(cap, tic->desc, dlen);
258		cap += dlen;
259	}
260
261	if (tic->flags.entries == 0) {
262		le16enc(cap, 0);
263		cap += sizeof(uint16_t);
264	} else {
265		le16enc(cap, (tic->flags.bufpos + sizeof(uint16_t)));
266		cap += sizeof(uint16_t);
267		le16enc(cap, tic->flags.entries);
268		cap += sizeof(uint16_t);
269		memcpy(cap, tic->flags.buf, tic->flags.bufpos);
270		cap += tic->flags.bufpos;
271	}
272
273	if (tic->nums.entries == 0) {
274		le16enc(cap, 0);
275		cap += sizeof(uint16_t);
276	} else {
277		le16enc(cap, (tic->nums.bufpos + sizeof(uint16_t)));
278		cap += sizeof(uint16_t);
279		le16enc(cap, tic->nums.entries);
280		cap += sizeof(uint16_t);
281		memcpy(cap, tic->nums.buf, tic->nums.bufpos);
282		cap += tic->nums.bufpos;
283	}
284
285	if (tic->strs.entries == 0) {
286		le16enc(cap, 0);
287		cap += sizeof(uint16_t);
288	} else {
289		le16enc(cap, (tic->strs.bufpos + sizeof(uint16_t)));
290		cap += sizeof(uint16_t);
291		le16enc(cap, tic->strs.entries);
292		cap += sizeof(uint16_t);
293		memcpy(cap, tic->strs.buf, tic->strs.bufpos);
294		cap += tic->strs.bufpos;
295	}
296
297	if (tic->extras.entries == 0) {
298		le16enc(cap, 0);
299		cap += sizeof(uint16_t);
300	} else {
301		le16enc(cap, (tic->extras.bufpos + sizeof(uint16_t)));
302		cap += sizeof(uint16_t);
303		le16enc(cap, tic->extras.entries);
304		cap += sizeof(uint16_t);
305		memcpy(cap, tic->extras.buf, tic->extras.bufpos);
306		cap += tic->extras.bufpos;
307	}
308
309	return cap - *buf;
310}
311
312static int
313encode_string(const char *term, const char *cap, TBUF *tbuf, const char *str,
314    int flags)
315{
316	int slash, i, num;
317	char ch, *p, *s, last;
318
319	if (_ti_grow_tbuf(tbuf, strlen(str) + 1) == NULL)
320		return -1;
321	p = s = tbuf->buf + tbuf->bufpos;
322	slash = 0;
323	last = '\0';
324	/* Convert escape codes */
325	while ((ch = *str++) != '\0') {
326		if (ch == '\n') {
327			/* Following a newline, strip leading whitespace from
328			 * capability strings. */
329			while (isspace((unsigned char)*str))
330				str++;
331			continue;
332		}
333		if (slash == 0 && ch == '\\') {
334			slash = 1;
335			continue;
336		}
337		if (slash == 0) {
338			if (last != '%' && ch == '^') {
339				ch = *str++;
340				if (((unsigned char)ch) >= 128)
341					dowarn(flags,
342					    "%s: %s: illegal ^ character",
343					    term, cap);
344				if (ch == '\0')
345					break;
346				if (ch == '?')
347					ch = '\177';
348				else if ((ch &= 037) == 0)
349					ch = (char)128;
350			} else if (!isprint((unsigned char)ch))
351				dowarn(flags,
352				    "%s: %s: unprintable character",
353				    term, cap);
354			*p++ = ch;
355			last = ch;
356			continue;
357		}
358		slash = 0;
359		if (ch >= '0' && ch <= '7') {
360			num = ch - '0';
361			for (i = 0; i < 2; i++) {
362				if (*str < '0' || *str > '7') {
363					if (isdigit((unsigned char)*str))
364						dowarn(flags,
365						    "%s: %s: non octal"
366						    " digit", term, cap);
367					else
368						break;
369				}
370				num = num * 8 + *str++ - '0';
371			}
372			if (num == 0)
373				num = 0200;
374			*p++ = (char)num;
375			continue;
376		}
377		switch (ch) {
378		case 'a':
379			*p++ = '\a';
380			break;
381		case 'b':
382			*p++ = '\b';
383			break;
384		case 'e': /* FALLTHROUGH */
385		case 'E':
386			*p++ = '\033';
387			break;
388		case 'f':
389			*p++ = '\014';
390			break;
391		case 'l': /* FALLTHROUGH */
392		case 'n':
393			*p++ = '\n';
394			break;
395		case 'r':
396			*p++ = '\r';
397			break;
398		case 's':
399			*p++ = ' ';
400			break;
401		case 't':
402			*p++ = '\t';
403			break;
404		default:
405			/* We should warn here */
406		case '^':
407		case ',':
408		case ':':
409		case '|':
410			*p++ = ch;
411			break;
412		}
413		last = ch;
414	}
415	*p++ = '\0';
416	tbuf->bufpos += p - s;
417	return 0;
418}
419
420char *
421_ti_get_token(char **cap, char sep)
422{
423	char esc, *token;
424
425	while (isspace((unsigned char)**cap))
426		(*cap)++;
427	if (**cap == '\0')
428		return NULL;
429
430	/* We can't use stresep(3) as ^ we need two escape chars */
431	esc = '\0';
432	for (token = *cap;
433	     **cap != '\0' && (esc != '\0' || **cap != sep);
434	     (*cap)++)
435	{
436		if (esc == '\0') {
437			if (**cap == '\\' || **cap == '^')
438				esc = **cap;
439		} else {
440			/* termcap /E/ is valid */
441			if (sep == ':' && esc == '\\' && **cap == 'E')
442				esc = 'x';
443			else
444				esc = '\0';
445		}
446	}
447
448	if (**cap != '\0')
449		*(*cap)++ = '\0';
450
451	return token;
452}
453
454TIC *
455_ti_compile(char *cap, int flags)
456{
457	char *token, *p, *e, *name, *desc, *alias;
458	signed char flag;
459	long cnum;
460	short num;
461	ssize_t ind;
462	size_t len;
463	TBUF buf;
464	TIC *tic;
465
466	_DIAGASSERT(cap != NULL);
467
468	name = _ti_get_token(&cap, ',');
469	if (name == NULL) {
470		dowarn(flags, "no seperator found: %s", cap);
471		return NULL;
472	}
473	desc = strrchr(name, '|');
474	if (desc != NULL)
475		*desc++ = '\0';
476	alias = strchr(name, '|');
477	if (alias != NULL)
478		*alias++ = '\0';
479
480	tic = calloc(sizeof(*tic), 1);
481	if (tic == NULL)
482		return NULL;
483
484	buf.buf = NULL;
485	buf.buflen = 0;
486
487	tic->name = strdup(name);
488	if (tic->name == NULL)
489		goto error;
490	if (alias != NULL && flags & TIC_ALIAS) {
491		tic->alias = strdup(alias);
492		if (tic->alias == NULL)
493			goto error;
494	}
495	if (desc != NULL && flags & TIC_DESCRIPTION) {
496		tic->desc = strdup(desc);
497		if (tic->desc == NULL)
498			goto error;
499	}
500
501	for (token = _ti_get_token(&cap, ',');
502	     token != NULL && *token != '\0';
503	     token = _ti_get_token(&cap, ','))
504	{
505		/* Skip commented caps */
506		if (!(flags & TIC_COMMENT) && token[0] == '.')
507			continue;
508
509		/* Obsolete entries */
510		if (token[0] == 'O' && token[1] == 'T') {
511			if (!(flags & TIC_EXTRA))
512				continue;
513			token += 2;
514		}
515
516		/* str cap */
517		p = strchr(token, '=');
518		if (p != NULL) {
519			*p++ = '\0';
520			/* Don't use the string if we already have it */
521			ind = _ti_strindex(token);
522			if (ind != -1 &&
523			    _ti_find_cap(&tic->strs, 's', ind) != NULL)
524				continue;
525
526			/* Encode the string to our scratch buffer */
527			buf.bufpos = 0;
528			if (encode_string(tic->name, token,
529				&buf, p, flags) == -1)
530				goto error;
531			if (buf.bufpos > UINT16_T_MAX) {
532				dowarn(flags, "%s: %s: string is too long",
533				    tic->name, token);
534				continue;
535			}
536			if (!VALID_STRING(buf.buf)) {
537				dowarn(flags, "%s: %s: invalid string",
538				    tic->name, token);
539				continue;
540			}
541
542			if (ind == -1)
543				_ti_store_extra(tic, 1, token, 's', -1, -2,
544				    buf.buf, buf.bufpos, flags);
545			else {
546				if (!_ti_grow_tbuf(&tic->strs,
547					(sizeof(uint16_t) * 2) + buf.bufpos))
548					goto error;
549				le16enc(tic->strs.buf + tic->strs.bufpos, ind);
550				tic->strs.bufpos += sizeof(uint16_t);
551				le16enc(tic->strs.buf + tic->strs.bufpos,
552				    buf.bufpos);
553				tic->strs.bufpos += sizeof(uint16_t);
554				memcpy(tic->strs.buf + tic->strs.bufpos,
555				    buf.buf, buf.bufpos);
556				tic->strs.bufpos += buf.bufpos;
557				tic->strs.entries++;
558			}
559			continue;
560		}
561
562		/* num cap */
563		p = strchr(token, '#');
564		if (p != NULL) {
565			*p++ = '\0';
566			/* Don't use the number if we already have it */
567			ind = _ti_numindex(token);
568			if (ind != -1 &&
569			    _ti_find_cap(&tic->nums, 'n', ind) != NULL)
570				continue;
571
572			cnum = strtol(p, &e, 0);
573			if (*e != '\0') {
574				dowarn(flags, "%s: %s: not a number",
575				    tic->name, token);
576				continue;
577			}
578			if (!VALID_NUMERIC(cnum)) {
579				dowarn(flags, "%s: %s: number out of range",
580				    tic->name, token);
581				continue;
582			}
583			num = (short)cnum;
584			if (ind == -1)
585				_ti_store_extra(tic, 1, token, 'n', -1,
586				    num, NULL, 0, flags);
587			else {
588				if (_ti_grow_tbuf(&tic->nums,
589					sizeof(uint16_t) * 2) == NULL)
590					goto error;
591				le16enc(tic->nums.buf + tic->nums.bufpos, ind);
592				tic->nums.bufpos += sizeof(uint16_t);
593				le16enc(tic->nums.buf + tic->nums.bufpos, num);
594				tic->nums.bufpos += sizeof(uint16_t);
595				tic->nums.entries++;
596			}
597			continue;
598		}
599
600		flag = 1;
601		len = strlen(token) - 1;
602		if (token[len] == '@') {
603			flag = CANCELLED_BOOLEAN;
604			token[len] = '\0';
605		}
606		ind = _ti_flagindex(token);
607		if (ind == -1 && flag == CANCELLED_BOOLEAN) {
608			if ((ind = _ti_numindex(token)) != -1) {
609				if (_ti_find_cap(&tic->nums, 'n', ind) != NULL)
610					continue;
611				if (_ti_grow_tbuf(&tic->nums,
612					sizeof(uint16_t) * 2) == NULL)
613					goto error;
614				le16enc(tic->nums.buf + tic->nums.bufpos, ind);
615				tic->nums.bufpos += sizeof(uint16_t);
616				le16enc(tic->nums.buf + tic->nums.bufpos,
617					(uint16_t)CANCELLED_NUMERIC);
618				tic->nums.bufpos += sizeof(uint16_t);
619				tic->nums.entries++;
620				continue;
621			} else if ((ind = _ti_strindex(token)) != -1) {
622				if (_ti_find_cap(&tic->strs, 's', ind) != NULL)
623					continue;
624				if (_ti_grow_tbuf(&tic->strs,
625					(sizeof(uint16_t) * 2) + 1) == NULL)
626					goto error;
627				le16enc(tic->strs.buf + tic->strs.bufpos, ind);
628				tic->strs.bufpos += sizeof(uint16_t);
629				le16enc(tic->strs.buf + tic->strs.bufpos, 0);
630				tic->strs.bufpos += sizeof(uint16_t);
631				tic->strs.entries++;
632				continue;
633			}
634		}
635		if (ind == -1)
636			_ti_store_extra(tic, 1, token, 'f', flag, 0, NULL, 0,
637			    flags);
638		else if (_ti_find_cap(&tic->flags, 'f', ind) == NULL) {
639			if (_ti_grow_tbuf(&tic->flags, sizeof(uint16_t) + 1)
640			    == NULL)
641				goto error;
642			le16enc(tic->flags.buf + tic->flags.bufpos, ind);
643			tic->flags.bufpos += sizeof(uint16_t);
644			tic->flags.buf[tic->flags.bufpos++] = flag;
645			tic->flags.entries++;
646		}
647	}
648
649	free(buf.buf);
650	return tic;
651
652error:
653	free(buf.buf);
654	_ti_freetic(tic);
655	return NULL;
656}
657
658void
659_ti_freetic(TIC *tic)
660{
661
662	if (tic != NULL) {
663		free(tic->name);
664		free(tic->alias);
665		free(tic->desc);
666		free(tic->extras.buf);
667		free(tic->flags.buf);
668		free(tic->nums.buf);
669		free(tic->strs.buf);
670		free(tic);
671	}
672}
673