tools/llvm: Do not build with symbols
[minix3.git] / external / bsd / mdocml / dist / man.c
blob7d474868aded98cde6207af8eaaf506d61375106
1 /* $Vendor-Id: man.c,v 1.115 2012/01/03 15:16:24 kristaps Exp $ */
2 /*
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #ifdef HAVE_CONFIG_H
18 #include "config.h"
19 #endif
21 #include <sys/types.h>
23 #include <assert.h>
24 #include <stdarg.h>
25 #include <stdlib.h>
26 #include <stdio.h>
27 #include <string.h>
29 #include "man.h"
30 #include "mandoc.h"
31 #include "libman.h"
32 #include "libmandoc.h"
34 const char *const __man_macronames[MAN_MAX] = {
35 "br", "TH", "SH", "SS",
36 "TP", "LP", "PP", "P",
37 "IP", "HP", "SM", "SB",
38 "BI", "IB", "BR", "RB",
39 "R", "B", "I", "IR",
40 "RI", "na", "sp", "nf",
41 "fi", "RE", "RS", "DT",
42 "UC", "PD", "AT", "in",
43 "ft", "OP"
46 const char * const *man_macronames = __man_macronames;
48 static struct man_node *man_node_alloc(struct man *, int, int,
49 enum man_type, enum mant);
50 static int man_node_append(struct man *,
51 struct man_node *);
52 static void man_node_free(struct man_node *);
53 static void man_node_unlink(struct man *,
54 struct man_node *);
55 static int man_ptext(struct man *, int, char *, int);
56 static int man_pmacro(struct man *, int, char *, int);
57 static void man_free1(struct man *);
58 static void man_alloc1(struct man *);
59 static int man_descope(struct man *, int, int);
62 const struct man_node *
63 man_node(const struct man *m)
66 assert( ! (MAN_HALT & m->flags));
67 return(m->first);
71 const struct man_meta *
72 man_meta(const struct man *m)
75 assert( ! (MAN_HALT & m->flags));
76 return(&m->meta);
80 void
81 man_reset(struct man *man)
84 man_free1(man);
85 man_alloc1(man);
89 void
90 man_free(struct man *man)
93 man_free1(man);
94 free(man);
98 struct man *
99 man_alloc(struct roff *roff, struct mparse *parse)
101 struct man *p;
103 p = mandoc_calloc(1, sizeof(struct man));
105 man_hash_init();
106 p->parse = parse;
107 p->roff = roff;
109 man_alloc1(p);
110 return(p);
115 man_endparse(struct man *m)
118 assert( ! (MAN_HALT & m->flags));
119 if (man_macroend(m))
120 return(1);
121 m->flags |= MAN_HALT;
122 return(0);
127 man_parseln(struct man *m, int ln, char *buf, int offs)
130 m->flags |= MAN_NEWLINE;
132 assert( ! (MAN_HALT & m->flags));
134 return (mandoc_getcontrol(buf, &offs) ?
135 man_pmacro(m, ln, buf, offs) :
136 man_ptext(m, ln, buf, offs));
140 static void
141 man_free1(struct man *man)
144 if (man->first)
145 man_node_delete(man, man->first);
146 if (man->meta.title)
147 free(man->meta.title);
148 if (man->meta.source)
149 free(man->meta.source);
150 if (man->meta.date)
151 free(man->meta.date);
152 if (man->meta.vol)
153 free(man->meta.vol);
154 if (man->meta.msec)
155 free(man->meta.msec);
159 static void
160 man_alloc1(struct man *m)
163 memset(&m->meta, 0, sizeof(struct man_meta));
164 m->flags = 0;
165 m->last = mandoc_calloc(1, sizeof(struct man_node));
166 m->first = m->last;
167 m->last->type = MAN_ROOT;
168 m->last->tok = MAN_MAX;
169 m->next = MAN_NEXT_CHILD;
173 static int
174 man_node_append(struct man *man, struct man_node *p)
177 assert(man->last);
178 assert(man->first);
179 assert(MAN_ROOT != p->type);
181 switch (man->next) {
182 case (MAN_NEXT_SIBLING):
183 man->last->next = p;
184 p->prev = man->last;
185 p->parent = man->last->parent;
186 break;
187 case (MAN_NEXT_CHILD):
188 man->last->child = p;
189 p->parent = man->last;
190 break;
191 default:
192 abort();
193 /* NOTREACHED */
196 assert(p->parent);
197 p->parent->nchild++;
199 if ( ! man_valid_pre(man, p))
200 return(0);
202 switch (p->type) {
203 case (MAN_HEAD):
204 assert(MAN_BLOCK == p->parent->type);
205 p->parent->head = p;
206 break;
207 case (MAN_TAIL):
208 assert(MAN_BLOCK == p->parent->type);
209 p->parent->tail = p;
210 break;
211 case (MAN_BODY):
212 assert(MAN_BLOCK == p->parent->type);
213 p->parent->body = p;
214 break;
215 default:
216 break;
219 man->last = p;
221 switch (p->type) {
222 case (MAN_TBL):
223 /* FALLTHROUGH */
224 case (MAN_TEXT):
225 if ( ! man_valid_post(man))
226 return(0);
227 break;
228 default:
229 break;
232 return(1);
236 static struct man_node *
237 man_node_alloc(struct man *m, int line, int pos,
238 enum man_type type, enum mant tok)
240 struct man_node *p;
242 p = mandoc_calloc(1, sizeof(struct man_node));
243 p->line = line;
244 p->pos = pos;
245 p->type = type;
246 p->tok = tok;
248 if (MAN_NEWLINE & m->flags)
249 p->flags |= MAN_LINE;
250 m->flags &= ~MAN_NEWLINE;
251 return(p);
256 man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
258 struct man_node *p;
260 p = man_node_alloc(m, line, pos, MAN_ELEM, tok);
261 if ( ! man_node_append(m, p))
262 return(0);
263 m->next = MAN_NEXT_CHILD;
264 return(1);
269 man_tail_alloc(struct man *m, int line, int pos, enum mant tok)
271 struct man_node *p;
273 p = man_node_alloc(m, line, pos, MAN_TAIL, tok);
274 if ( ! man_node_append(m, p))
275 return(0);
276 m->next = MAN_NEXT_CHILD;
277 return(1);
282 man_head_alloc(struct man *m, int line, int pos, enum mant tok)
284 struct man_node *p;
286 p = man_node_alloc(m, line, pos, MAN_HEAD, tok);
287 if ( ! man_node_append(m, p))
288 return(0);
289 m->next = MAN_NEXT_CHILD;
290 return(1);
295 man_body_alloc(struct man *m, int line, int pos, enum mant tok)
297 struct man_node *p;
299 p = man_node_alloc(m, line, pos, MAN_BODY, tok);
300 if ( ! man_node_append(m, p))
301 return(0);
302 m->next = MAN_NEXT_CHILD;
303 return(1);
308 man_block_alloc(struct man *m, int line, int pos, enum mant tok)
310 struct man_node *p;
312 p = man_node_alloc(m, line, pos, MAN_BLOCK, tok);
313 if ( ! man_node_append(m, p))
314 return(0);
315 m->next = MAN_NEXT_CHILD;
316 return(1);
320 man_word_alloc(struct man *m, int line, int pos, const char *word)
322 struct man_node *n;
324 n = man_node_alloc(m, line, pos, MAN_TEXT, MAN_MAX);
325 n->string = roff_strdup(m->roff, word);
327 if ( ! man_node_append(m, n))
328 return(0);
330 m->next = MAN_NEXT_SIBLING;
331 return(1);
336 * Free all of the resources held by a node. This does NOT unlink a
337 * node from its context; for that, see man_node_unlink().
339 static void
340 man_node_free(struct man_node *p)
343 if (p->string)
344 free(p->string);
345 free(p);
349 void
350 man_node_delete(struct man *m, struct man_node *p)
353 while (p->child)
354 man_node_delete(m, p->child);
356 man_node_unlink(m, p);
357 man_node_free(p);
361 man_addeqn(struct man *m, const struct eqn *ep)
363 struct man_node *n;
365 assert( ! (MAN_HALT & m->flags));
367 n = man_node_alloc(m, ep->ln, ep->pos, MAN_EQN, MAN_MAX);
368 n->eqn = ep;
370 if ( ! man_node_append(m, n))
371 return(0);
373 m->next = MAN_NEXT_SIBLING;
374 return(man_descope(m, ep->ln, ep->pos));
378 man_addspan(struct man *m, const struct tbl_span *sp)
380 struct man_node *n;
382 assert( ! (MAN_HALT & m->flags));
384 n = man_node_alloc(m, sp->line, 0, MAN_TBL, MAN_MAX);
385 n->span = sp;
387 if ( ! man_node_append(m, n))
388 return(0);
390 m->next = MAN_NEXT_SIBLING;
391 return(man_descope(m, sp->line, 0));
394 static int
395 man_descope(struct man *m, int line, int offs)
398 * Co-ordinate what happens with having a next-line scope open:
399 * first close out the element scope (if applicable), then close
400 * out the block scope (also if applicable).
403 if (MAN_ELINE & m->flags) {
404 m->flags &= ~MAN_ELINE;
405 if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
406 return(0);
409 if ( ! (MAN_BLINE & m->flags))
410 return(1);
411 m->flags &= ~MAN_BLINE;
413 if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
414 return(0);
415 return(man_body_alloc(m, line, offs, m->last->tok));
418 static int
419 man_ptext(struct man *m, int line, char *buf, int offs)
421 int i;
423 /* Literal free-form text whitespace is preserved. */
425 if (MAN_LITERAL & m->flags) {
426 if ( ! man_word_alloc(m, line, offs, buf + offs))
427 return(0);
428 return(man_descope(m, line, offs));
431 /* Pump blank lines directly into the backend. */
433 for (i = offs; ' ' == buf[i]; i++)
434 /* Skip leading whitespace. */ ;
436 if ('\0' == buf[i]) {
437 /* Allocate a blank entry. */
438 if ( ! man_word_alloc(m, line, offs, ""))
439 return(0);
440 return(man_descope(m, line, offs));
444 * Warn if the last un-escaped character is whitespace. Then
445 * strip away the remaining spaces (tabs stay!).
448 i = (int)strlen(buf);
449 assert(i);
451 if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
452 if (i > 1 && '\\' != buf[i - 2])
453 man_pmsg(m, line, i - 1, MANDOCERR_EOLNSPACE);
455 for (--i; i && ' ' == buf[i]; i--)
456 /* Spin back to non-space. */ ;
458 /* Jump ahead of escaped whitespace. */
459 i += '\\' == buf[i] ? 2 : 1;
461 buf[i] = '\0';
464 if ( ! man_word_alloc(m, line, offs, buf + offs))
465 return(0);
468 * End-of-sentence check. If the last character is an unescaped
469 * EOS character, then flag the node as being the end of a
470 * sentence. The front-end will know how to interpret this.
473 assert(i);
474 if (mandoc_eos(buf, (size_t)i, 0))
475 m->last->flags |= MAN_EOS;
477 return(man_descope(m, line, offs));
480 static int
481 man_pmacro(struct man *m, int ln, char *buf, int offs)
483 int i, ppos;
484 enum mant tok;
485 char mac[5];
486 struct man_node *n;
488 if ('"' == buf[offs]) {
489 man_pmsg(m, ln, offs, MANDOCERR_BADCOMMENT);
490 return(1);
491 } else if ('\0' == buf[offs])
492 return(1);
494 ppos = offs;
497 * Copy the first word into a nil-terminated buffer.
498 * Stop copying when a tab, space, or eoln is encountered.
501 i = 0;
502 while (i < 4 && '\0' != buf[offs] &&
503 ' ' != buf[offs] && '\t' != buf[offs])
504 mac[i++] = buf[offs++];
506 mac[i] = '\0';
508 tok = (i > 0 && i < 4) ? man_hash_find(mac) : MAN_MAX;
510 if (MAN_MAX == tok) {
511 mandoc_vmsg(MANDOCERR_MACRO, m->parse, ln,
512 ppos, "%s", buf + ppos - 1);
513 return(1);
516 /* The macro is sane. Jump to the next word. */
518 while (buf[offs] && ' ' == buf[offs])
519 offs++;
522 * Trailing whitespace. Note that tabs are allowed to be passed
523 * into the parser as "text", so we only warn about spaces here.
526 if ('\0' == buf[offs] && ' ' == buf[offs - 1])
527 man_pmsg(m, ln, offs - 1, MANDOCERR_EOLNSPACE);
530 * Remove prior ELINE macro, as it's being clobbered by a new
531 * macro. Note that NSCOPED macros do not close out ELINE
532 * macros---they don't print text---so we let those slip by.
535 if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
536 m->flags & MAN_ELINE) {
537 n = m->last;
538 assert(MAN_TEXT != n->type);
540 /* Remove repeated NSCOPED macros causing ELINE. */
542 if (MAN_NSCOPED & man_macros[n->tok].flags)
543 n = n->parent;
545 mandoc_vmsg(MANDOCERR_LINESCOPE, m->parse, n->line,
546 n->pos, "%s breaks %s", man_macronames[tok],
547 man_macronames[n->tok]);
549 man_node_delete(m, n);
550 m->flags &= ~MAN_ELINE;
554 * Remove prior BLINE macro that is being clobbered.
556 if ((m->flags & MAN_BLINE) &&
557 (MAN_BSCOPE & man_macros[tok].flags)) {
558 n = m->last;
560 /* Might be a text node like 8 in
561 * .TP 8
562 * .SH foo
564 if (MAN_TEXT == n->type)
565 n = n->parent;
567 /* Remove element that didn't end BLINE, if any. */
568 if ( ! (MAN_BSCOPE & man_macros[n->tok].flags))
569 n = n->parent;
571 assert(MAN_HEAD == n->type);
572 n = n->parent;
573 assert(MAN_BLOCK == n->type);
574 assert(MAN_SCOPED & man_macros[n->tok].flags);
576 mandoc_vmsg(MANDOCERR_LINESCOPE, m->parse, n->line,
577 n->pos, "%s breaks %s", man_macronames[tok],
578 man_macronames[n->tok]);
580 man_node_delete(m, n);
581 m->flags &= ~MAN_BLINE;
585 * Save the fact that we're in the next-line for a block. In
586 * this way, embedded roff instructions can "remember" state
587 * when they exit.
590 if (MAN_BLINE & m->flags)
591 m->flags |= MAN_BPLINE;
593 /* Call to handler... */
595 assert(man_macros[tok].fp);
596 if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &offs, buf))
597 goto err;
600 * We weren't in a block-line scope when entering the
601 * above-parsed macro, so return.
604 if ( ! (MAN_BPLINE & m->flags)) {
605 m->flags &= ~MAN_ILINE;
606 return(1);
608 m->flags &= ~MAN_BPLINE;
611 * If we're in a block scope, then allow this macro to slip by
612 * without closing scope around it.
615 if (MAN_ILINE & m->flags) {
616 m->flags &= ~MAN_ILINE;
617 return(1);
621 * If we've opened a new next-line element scope, then return
622 * now, as the next line will close out the block scope.
625 if (MAN_ELINE & m->flags)
626 return(1);
628 /* Close out the block scope opened in the prior line. */
630 assert(MAN_BLINE & m->flags);
631 m->flags &= ~MAN_BLINE;
633 if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
634 return(0);
635 return(man_body_alloc(m, ln, ppos, m->last->tok));
637 err: /* Error out. */
639 m->flags |= MAN_HALT;
640 return(0);
644 * Unlink a node from its context. If "m" is provided, the last parse
645 * point will also be adjusted accordingly.
647 static void
648 man_node_unlink(struct man *m, struct man_node *n)
651 /* Adjust siblings. */
653 if (n->prev)
654 n->prev->next = n->next;
655 if (n->next)
656 n->next->prev = n->prev;
658 /* Adjust parent. */
660 if (n->parent) {
661 n->parent->nchild--;
662 if (n->parent->child == n)
663 n->parent->child = n->prev ? n->prev : n->next;
666 /* Adjust parse point, if applicable. */
668 if (m && m->last == n) {
669 /*XXX: this can occur when bailing from validation. */
670 /*assert(NULL == n->next);*/
671 if (n->prev) {
672 m->last = n->prev;
673 m->next = MAN_NEXT_SIBLING;
674 } else {
675 m->last = n->parent;
676 m->next = MAN_NEXT_CHILD;
680 if (m && m->first == n)
681 m->first = NULL;
684 const struct mparse *
685 man_mparse(const struct man *m)
688 assert(m && m->parse);
689 return(m->parse);