compile.c revision 1.7 
1/* $NetBSD: compile.c,v 1.7 2012/06/01 12:08:40 joerg 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 1.7 2012/06/01 12:08:40 joerg 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	if (alen == 0 && dlen == 0 && tic->flags.bufpos == 0 &&
243	    tic->nums.bufpos == 0 && tic->strs.bufpos == 0 &&
244	    tic->extras.bufpos == 0)
245		*cap++ = 0; /* alias */
246	else
247		*cap++ = 2; /* version */
248	le16enc(cap, len);
249	cap += sizeof(uint16_t);
250	memcpy(cap, tic->name, len);
251	cap += len;
252
253	le16enc(cap, alen);
254	cap += sizeof(uint16_t);
255	if (tic->alias != NULL) {
256		memcpy(cap, tic->alias, alen);
257		cap += alen;
258	}
259	le16enc(cap, dlen);
260	cap += sizeof(uint16_t);
261	if (tic->desc != NULL) {
262		memcpy(cap, tic->desc, dlen);
263		cap += dlen;
264	}
265
266	if (tic->flags.entries == 0) {
267		le16enc(cap, 0);
268		cap += sizeof(uint16_t);
269	} else {
270		le16enc(cap, (tic->flags.bufpos + sizeof(uint16_t)));
271		cap += sizeof(uint16_t);
272		le16enc(cap, tic->flags.entries);
273		cap += sizeof(uint16_t);
274		memcpy(cap, tic->flags.buf, tic->flags.bufpos);
275		cap += tic->flags.bufpos;
276	}
277
278	if (tic->nums.entries == 0) {
279		le16enc(cap, 0);
280		cap += sizeof(uint16_t);
281	} else {
282		le16enc(cap, (tic->nums.bufpos + sizeof(uint16_t)));
283		cap += sizeof(uint16_t);
284		le16enc(cap, tic->nums.entries);
285		cap += sizeof(uint16_t);
286		memcpy(cap, tic->nums.buf, tic->nums.bufpos);
287		cap += tic->nums.bufpos;
288	}
289
290	if (tic->strs.entries == 0) {
291		le16enc(cap, 0);
292		cap += sizeof(uint16_t);
293	} else {
294		le16enc(cap, (tic->strs.bufpos + sizeof(uint16_t)));
295		cap += sizeof(uint16_t);
296		le16enc(cap, tic->strs.entries);
297		cap += sizeof(uint16_t);
298		memcpy(cap, tic->strs.buf, tic->strs.bufpos);
299		cap += tic->strs.bufpos;
300	}
301
302	if (tic->extras.entries == 0) {
303		le16enc(cap, 0);
304		cap += sizeof(uint16_t);
305	} else {
306		le16enc(cap, (tic->extras.bufpos + sizeof(uint16_t)));
307		cap += sizeof(uint16_t);
308		le16enc(cap, tic->extras.entries);
309		cap += sizeof(uint16_t);
310		memcpy(cap, tic->extras.buf, tic->extras.bufpos);
311		cap += tic->extras.bufpos;
312	}
313
314	return cap - *buf;
315}
316
317static int
318encode_string(const char *term, const char *cap, TBUF *tbuf, const char *str,
319    int flags)
320{
321	int slash, i, num;
322	char ch, *p, *s, last;
323
324	if (_ti_grow_tbuf(tbuf, strlen(str) + 1) == NULL)
325		return -1;
326	p = s = tbuf->buf + tbuf->bufpos;
327	slash = 0;
328	last = '\0';
329	/* Convert escape codes */
330	while ((ch = *str++) != '\0') {
331		if (slash == 0 && ch == '\\') {
332			slash = 1;
333			continue;
334		}
335		if (slash == 0) {
336			if (last != '%' && ch == '^') {
337				ch = *str++;
338				if (((unsigned char)ch) >= 128)
339					dowarn(flags,
340					    "%s: %s: illegal ^ character",
341					    term, cap);
342				if (ch == '\0')
343					break;
344				if (ch == '?')
345					ch = '\177';
346				else if ((ch &= 037) == 0)
347					ch = (char)128;
348			}
349			*p++ = ch;
350			last = ch;
351			continue;
352		}
353		slash = 0;
354		if (ch >= '0' && ch <= '7') {
355			num = ch - '0';
356			for (i = 0; i < 2; i++) {
357				if (*str < '0' || *str > '7') {
358					if (isdigit((unsigned char)*str))
359						dowarn(flags,
360						    "%s: %s: non octal"
361						    " digit", term, cap);
362					else
363						break;
364				}
365				num = num * 8 + *str++ - '0';
366			}
367			if (num == 0)
368				num = 0200;
369			*p++ = (char)num;
370			continue;
371		}
372		switch (ch) {
373		case 'a':
374			*p++ = '\a';
375			break;
376		case 'b':
377			*p++ = '\b';
378			break;
379		case 'e': /* FALLTHROUGH */
380		case 'E':
381			*p++ = '\033';
382			break;
383		case 'f':
384			*p++ = '\014';
385			break;
386		case 'l': /* FALLTHROUGH */
387		case 'n':
388			*p++ = '\n';
389			break;
390		case 'r':
391			*p++ = '\r';
392			break;
393		case 's':
394			*p++ = ' ';
395			break;
396		case 't':
397			*p++ = '\t';
398			break;
399		default:
400
401			/* We should warn here */
402		case '^':
403		case ',':
404		case ':':
405		case '|':
406			*p++ = ch;
407			break;
408		}
409		last = ch;
410	}
411	*p++ = '\0';
412	tbuf->bufpos += p - s;
413	return 0;
414}
415
416char *
417_ti_get_token(char **cap, char sep)
418{
419	char esc, *token;
420
421	while (isspace((unsigned char)**cap))
422		(*cap)++;
423	if (**cap == '\0')
424		return NULL;
425
426	/* We can't use stresep(3) as ^ we need two escape chars */
427	esc = '\0';
428	for (token = *cap;
429	     **cap != '\0' && (esc != '\0' || **cap != sep);
430	     (*cap)++)
431	{
432		if (esc == '\0') {
433			if (**cap == '\\' || **cap == '^')
434				esc = **cap;
435		} else {
436			/* termcap /E/ is valid */
437			if (sep == ':' && esc == '\\' && **cap == 'E')
438				esc = 'x';
439			else
440				esc = '\0';
441		}
442	}
443
444	if (**cap != '\0')
445		*(*cap)++ = '\0';
446
447	return token;
448}
449
450TIC *
451_ti_compile(char *cap, int flags)
452{
453	char *token, *p, *e, *name, *desc, *alias;
454	signed char flag;
455	long cnum;
456	short num;
457	ssize_t ind;
458	size_t len;
459	TBUF buf;
460	TIC *tic;
461
462	_DIAGASSERT(cap != NULL);
463
464	name = _ti_get_token(&cap, ',');
465	if (name == NULL) {
466		dowarn(flags, "no seperator found: %s", cap);
467		return NULL;
468	}
469	desc = strrchr(name, '|');
470	if (desc != NULL)
471		*desc++ = '\0';
472	alias = strchr(name, '|');
473	if (alias != NULL)
474		*alias++ = '\0';
475
476	tic = calloc(sizeof(*tic), 1);
477	if (tic == NULL)
478		return NULL;
479
480	buf.buf = NULL;
481	buf.buflen = 0;
482
483	tic->name = strdup(name);
484	if (tic->name == NULL)
485		goto error;
486	if (alias != NULL && flags & TIC_ALIAS) {
487		tic->alias = strdup(alias);
488		if (tic->alias == NULL)
489			goto error;
490	}
491	if (desc != NULL && flags & TIC_DESCRIPTION) {
492		tic->desc = strdup(desc);
493		if (tic->desc == NULL)
494			goto error;
495	}
496
497	for (token = _ti_get_token(&cap, ',');
498	     token != NULL && *token != '\0';
499	     token = _ti_get_token(&cap, ','))
500	{
501		/* Skip commented caps */
502		if (!(flags & TIC_COMMENT) && token[0] == '.')
503			continue;
504
505		/* Obsolete entries */
506		if (token[0] == 'O' && token[1] == 'T') {
507			if (!(flags & TIC_EXTRA))
508				continue;
509			token += 2;
510		}
511
512		/* str cap */
513		p = strchr(token, '=');
514		if (p != NULL) {
515			*p++ = '\0';
516			/* Don't use the string if we already have it */
517			ind = _ti_strindex(token);
518			if (ind != -1 &&
519			    _ti_find_cap(&tic->strs, 's', ind) != NULL)
520				continue;
521
522			/* Encode the string to our scratch buffer */
523			buf.bufpos = 0;
524			if (encode_string(tic->name, token,
525				&buf, p, flags) == -1)
526				goto error;
527			if (buf.bufpos > UINT16_T_MAX) {
528				dowarn(flags, "%s: %s: string is too long",
529				    tic->name, token);
530				continue;
531			}
532			if (!VALID_STRING(buf.buf)) {
533				dowarn(flags, "%s: %s: invalid string",
534				    tic->name, token);
535				continue;
536			}
537
538			if (ind == -1)
539				_ti_store_extra(tic, 1, token, 's', -1, -2,
540				    buf.buf, buf.bufpos, flags);
541			else {
542				if (!_ti_grow_tbuf(&tic->strs,
543					(sizeof(uint16_t) * 2) + buf.bufpos))
544					goto error;
545				le16enc(tic->strs.buf + tic->strs.bufpos, ind);
546				tic->strs.bufpos += sizeof(uint16_t);
547				le16enc(tic->strs.buf + tic->strs.bufpos,
548				    buf.bufpos);
549				tic->strs.bufpos += sizeof(uint16_t);
550				memcpy(tic->strs.buf + tic->strs.bufpos,
551				    buf.buf, buf.bufpos);
552				tic->strs.bufpos += buf.bufpos;
553				tic->strs.entries++;
554			}
555			continue;
556		}
557
558		/* num cap */
559		p = strchr(token, '#');
560		if (p != NULL) {
561			*p++ = '\0';
562			/* Don't use the number if we already have it */
563			ind = _ti_numindex(token);
564			if (ind != -1 &&
565			    _ti_find_cap(&tic->nums, 'n', ind) != NULL)
566				continue;
567
568			cnum = strtol(p, &e, 0);
569			if (*e != '\0') {
570				dowarn(flags, "%s: %s: not a number",
571				    tic->name, token);
572				continue;
573			}
574			if (!VALID_NUMERIC(cnum)) {
575				dowarn(flags, "%s: %s: number out of range",
576				    tic->name, token);
577				continue;
578			}
579			num = (short)cnum;
580			if (ind == -1)
581				_ti_store_extra(tic, 1, token, 'n', -1,
582				    num, NULL, 0, flags);
583			else {
584				if (_ti_grow_tbuf(&tic->nums,
585					sizeof(uint16_t) * 2) == NULL)
586					goto error;
587				le16enc(tic->nums.buf + tic->nums.bufpos, ind);
588				tic->nums.bufpos += sizeof(uint16_t);
589				le16enc(tic->nums.buf + tic->nums.bufpos, num);
590				tic->nums.bufpos += sizeof(uint16_t);
591				tic->nums.entries++;
592			}
593			continue;
594		}
595
596		flag = 1;
597		len = strlen(token) - 1;
598		if (token[len] == '@') {
599			flag = CANCELLED_BOOLEAN;
600			token[len] = '\0';
601		}
602		ind = _ti_flagindex(token);
603		if (ind == -1 && flag == CANCELLED_BOOLEAN) {
604			if ((ind = _ti_numindex(token)) != -1) {
605				if (_ti_find_cap(&tic->nums, 'n', ind) != NULL)
606					continue;
607				if (_ti_grow_tbuf(&tic->nums,
608					sizeof(uint16_t) * 2) == NULL)
609					goto error;
610				le16enc(tic->nums.buf + tic->nums.bufpos, ind);
611				tic->nums.bufpos += sizeof(uint16_t);
612				le16enc(tic->nums.buf + tic->nums.bufpos,
613					(uint16_t)CANCELLED_NUMERIC);
614				tic->nums.bufpos += sizeof(uint16_t);
615				tic->nums.entries++;
616				continue;
617			} else if ((ind = _ti_strindex(token)) != -1) {
618				if (_ti_find_cap(&tic->strs, 's', ind) != NULL)
619					continue;
620				if (_ti_grow_tbuf(&tic->strs,
621					(sizeof(uint16_t) * 2) + 1) == NULL)
622					goto error;
623				le16enc(tic->strs.buf + tic->strs.bufpos, ind);
624				tic->strs.bufpos += sizeof(uint16_t);
625				le16enc(tic->strs.buf + tic->strs.bufpos, 0);
626				tic->strs.bufpos += sizeof(uint16_t);
627				tic->strs.entries++;
628				continue;
629			}
630		}
631		if (ind == -1)
632			_ti_store_extra(tic, 1, token, 'f', flag, 0, NULL, 0,
633			    flags);
634		else if (_ti_find_cap(&tic->flags, 'f', ind) == NULL) {
635			if (_ti_grow_tbuf(&tic->flags, sizeof(uint16_t) + 1)
636			    == NULL)
637				goto error;
638			le16enc(tic->flags.buf + tic->flags.bufpos, ind);
639			tic->flags.bufpos += sizeof(uint16_t);
640			tic->flags.buf[tic->flags.bufpos++] = flag;
641			tic->flags.entries++;
642		}
643	}
644
645	free(buf.buf);
646	return tic;
647
648error:
649	free(buf.buf);
650	_ti_freetic(tic);
651	return NULL;
652}
653
654void
655_ti_freetic(TIC *tic)
656{
657
658	if (tic != NULL) {
659		free(tic->name);
660		free(tic->alias);
661		free(tic->desc);
662		free(tic->extras.buf);
663		free(tic->flags.buf);
664		free(tic->nums.buf);
665		free(tic->strs.buf);
666		free(tic);
667	}
668}
669