Annotation of mandoc/man.c, Revision 1.61
1.61 ! kristaps 1: /* $Id: man.c,v 1.60 2010/04/08 07:53:01 kristaps Exp $ */
1.1 kristaps 2: /*
1.19 kristaps 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
1.1 kristaps 4: *
5: * Permission to use, copy, modify, and distribute this software for any
1.18 kristaps 6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 8: *
1.18 kristaps 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.
1.1 kristaps 16: */
1.47 kristaps 17: #ifdef HAVE_CONFIG_H
18: #include "config.h"
19: #endif
20:
1.41 kristaps 21: #include <sys/types.h>
22:
1.1 kristaps 23: #include <assert.h>
24: #include <ctype.h>
25: #include <stdarg.h>
26: #include <stdlib.h>
27: #include <stdio.h>
28: #include <string.h>
29:
30: #include "libman.h"
1.45 kristaps 31: #include "libmandoc.h"
1.1 kristaps 32:
1.27 kristaps 33: const char *const __man_merrnames[WERRMAX] = {
34: "invalid character", /* WNPRINT */
35: "invalid manual section", /* WMSEC */
36: "invalid date format", /* WDATE */
37: "scope of prior line violated", /* WLNSCOPE */
1.51 kristaps 38: "over-zealous prior line scope violation", /* WLNSCOPE2 */
1.27 kristaps 39: "trailing whitespace", /* WTSPACE */
40: "unterminated quoted parameter", /* WTQUOTE */
41: "document has no body", /* WNODATA */
42: "document has no title/section", /* WNOTITLE */
43: "invalid escape sequence", /* WESCAPE */
1.28 kristaps 44: "invalid number format", /* WNUMFMT */
1.29 kristaps 45: "expected block head arguments", /* WHEADARGS */
46: "expected block body arguments", /* WBODYARGS */
47: "expected empty block head", /* WNHEADARGS */
48: "ill-formed macro", /* WMACROFORM */
1.30 kristaps 49: "scope open on exit", /* WEXITSCOPE */
1.35 kristaps 50: "no scope context", /* WNOSCOPE */
51: "literal context already open", /* WOLITERAL */
1.54 kristaps 52: "no literal context open", /* WNLITERAL */
53: "invalid nesting of roff declarations", /* WROFFNEST */
1.55 kristaps 54: "scope in roff instructions broken", /* WROFFSCOPE */
55: "document title should be uppercase", /* WTITLECASE */
1.60 kristaps 56: "deprecated comment style", /* WBADCOMMENT */
1.27 kristaps 57: };
58:
1.1 kristaps 59: const char *const __man_macronames[MAN_MAX] = {
1.21 kristaps 60: "br", "TH", "SH", "SS",
1.1 kristaps 61: "TP", "LP", "PP", "P",
62: "IP", "HP", "SM", "SB",
63: "BI", "IB", "BR", "RB",
1.11 kristaps 64: "R", "B", "I", "IR",
1.29 kristaps 65: "RI", "na", "i", "sp",
1.30 kristaps 66: "nf", "fi", "r", "RE",
1.52 kristaps 67: "RS", "DT", "UC", "PD",
1.54 kristaps 68: "Sp", "Vb", "Ve", "de",
69: "dei", "am", "ami", "ig",
70: ".",
1.1 kristaps 71: };
72:
73: const char * const *man_macronames = __man_macronames;
74:
1.16 kristaps 75: static struct man_node *man_node_alloc(int, int,
1.53 kristaps 76: enum man_type, enum mant);
1.1 kristaps 77: static int man_node_append(struct man *,
78: struct man_node *);
1.54 kristaps 79: static void man_node_free(struct man_node *);
80: static void man_node_unlink(struct man *,
81: struct man_node *);
1.1 kristaps 82: static int man_ptext(struct man *, int, char *);
83: static int man_pmacro(struct man *, int, char *);
1.2 kristaps 84: static void man_free1(struct man *);
1.45 kristaps 85: static void man_alloc1(struct man *);
1.43 kristaps 86: static int macrowarn(struct man *, int, const char *);
1.1 kristaps 87:
88:
89: const struct man_node *
1.2 kristaps 90: man_node(const struct man *m)
1.1 kristaps 91: {
92:
1.2 kristaps 93: return(MAN_HALT & m->flags ? NULL : m->first);
1.1 kristaps 94: }
95:
96:
97: const struct man_meta *
1.2 kristaps 98: man_meta(const struct man *m)
1.1 kristaps 99: {
100:
1.2 kristaps 101: return(MAN_HALT & m->flags ? NULL : &m->meta);
1.1 kristaps 102: }
103:
104:
1.45 kristaps 105: void
1.1 kristaps 106: man_reset(struct man *man)
107: {
108:
1.2 kristaps 109: man_free1(man);
1.45 kristaps 110: man_alloc1(man);
1.1 kristaps 111: }
112:
113:
114: void
115: man_free(struct man *man)
116: {
117:
1.2 kristaps 118: man_free1(man);
1.1 kristaps 119: free(man);
120: }
121:
122:
123: struct man *
1.7 kristaps 124: man_alloc(void *data, int pflags, const struct man_cb *cb)
1.1 kristaps 125: {
126: struct man *p;
127:
1.45 kristaps 128: p = mandoc_calloc(1, sizeof(struct man));
1.2 kristaps 129:
1.45 kristaps 130: if (cb)
131: memcpy(&p->cb, cb, sizeof(struct man_cb));
1.1 kristaps 132:
1.40 kristaps 133: man_hash_init();
1.4 kristaps 134: p->data = data;
1.7 kristaps 135: p->pflags = pflags;
1.45 kristaps 136:
137: man_alloc1(p);
1.1 kristaps 138: return(p);
139: }
140:
141:
142: int
143: man_endparse(struct man *m)
144: {
145:
1.3 kristaps 146: if (MAN_HALT & m->flags)
147: return(0);
148: else if (man_macroend(m))
149: return(1);
150: m->flags |= MAN_HALT;
151: return(0);
1.1 kristaps 152: }
153:
154:
155: int
156: man_parseln(struct man *m, int ln, char *buf)
157: {
158:
1.55 kristaps 159: return('.' == *buf || '\'' == *buf ?
1.1 kristaps 160: man_pmacro(m, ln, buf) :
161: man_ptext(m, ln, buf));
162: }
163:
164:
1.2 kristaps 165: static void
166: man_free1(struct man *man)
167: {
168:
169: if (man->first)
1.54 kristaps 170: man_node_delete(man, man->first);
1.2 kristaps 171: if (man->meta.title)
172: free(man->meta.title);
1.6 kristaps 173: if (man->meta.source)
174: free(man->meta.source);
1.2 kristaps 175: if (man->meta.vol)
176: free(man->meta.vol);
177: }
178:
179:
1.45 kristaps 180: static void
1.2 kristaps 181: man_alloc1(struct man *m)
182: {
183:
1.44 kristaps 184: memset(&m->meta, 0, sizeof(struct man_meta));
1.2 kristaps 185: m->flags = 0;
1.45 kristaps 186: m->last = mandoc_calloc(1, sizeof(struct man_node));
1.2 kristaps 187: m->first = m->last;
188: m->last->type = MAN_ROOT;
1.54 kristaps 189: m->last->tok = MAN_MAX;
1.2 kristaps 190: m->next = MAN_NEXT_CHILD;
191: }
192:
193:
1.1 kristaps 194: static int
195: man_node_append(struct man *man, struct man_node *p)
196: {
197:
198: assert(man->last);
199: assert(man->first);
200: assert(MAN_ROOT != p->type);
201:
202: switch (man->next) {
203: case (MAN_NEXT_SIBLING):
204: man->last->next = p;
205: p->prev = man->last;
206: p->parent = man->last->parent;
207: break;
208: case (MAN_NEXT_CHILD):
209: man->last->child = p;
210: p->parent = man->last;
211: break;
212: default:
213: abort();
214: /* NOTREACHED */
215: }
1.22 kristaps 216:
1.54 kristaps 217: assert(p->parent);
1.22 kristaps 218: p->parent->nchild++;
1.1 kristaps 219:
1.29 kristaps 220: if ( ! man_valid_pre(man, p))
221: return(0);
222:
223: switch (p->type) {
224: case (MAN_HEAD):
225: assert(MAN_BLOCK == p->parent->type);
226: p->parent->head = p;
227: break;
228: case (MAN_BODY):
229: assert(MAN_BLOCK == p->parent->type);
230: p->parent->body = p;
231: break;
232: default:
233: break;
234: }
235:
1.2 kristaps 236: man->last = p;
237:
1.1 kristaps 238: switch (p->type) {
1.2 kristaps 239: case (MAN_TEXT):
240: if ( ! man_valid_post(man))
241: return(0);
242: if ( ! man_action_post(man))
243: return(0);
1.1 kristaps 244: break;
245: default:
246: break;
247: }
248:
249: return(1);
250: }
251:
252:
253: static struct man_node *
1.53 kristaps 254: man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
1.1 kristaps 255: {
256: struct man_node *p;
257:
1.45 kristaps 258: p = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 259: p->line = line;
260: p->pos = pos;
261: p->type = type;
1.16 kristaps 262: p->tok = tok;
1.1 kristaps 263: return(p);
264: }
265:
266:
267: int
1.53 kristaps 268: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1 kristaps 269: {
270: struct man_node *p;
271:
1.16 kristaps 272: p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.30 kristaps 273: if ( ! man_node_append(m, p))
274: return(0);
275: m->next = MAN_NEXT_CHILD;
276: return(1);
1.1 kristaps 277: }
278:
279:
280: int
1.53 kristaps 281: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 282: {
283: struct man_node *p;
284:
285: p = man_node_alloc(line, pos, MAN_HEAD, tok);
286: if ( ! man_node_append(m, p))
287: return(0);
288: m->next = MAN_NEXT_CHILD;
289: return(1);
290: }
291:
292:
293: int
1.53 kristaps 294: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 295: {
296: struct man_node *p;
297:
298: p = man_node_alloc(line, pos, MAN_BODY, tok);
299: if ( ! man_node_append(m, p))
300: return(0);
301: m->next = MAN_NEXT_CHILD;
302: return(1);
303: }
304:
305:
306: int
1.53 kristaps 307: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 308: {
309: struct man_node *p;
310:
311: p = man_node_alloc(line, pos, MAN_BLOCK, tok);
312: if ( ! man_node_append(m, p))
313: return(0);
314: m->next = MAN_NEXT_CHILD;
315: return(1);
316: }
317:
318:
1.61 ! kristaps 319: int
! 320: man_word_alloc(struct man *m, int line, int pos, const char *word)
1.1 kristaps 321: {
1.31 kristaps 322: struct man_node *n;
1.61 ! kristaps 323: size_t sv, len;
! 324:
! 325: len = strlen(word);
1.1 kristaps 326:
1.53 kristaps 327: n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
1.45 kristaps 328: n->string = mandoc_malloc(len + 1);
1.61 ! kristaps 329: sv = strlcpy(n->string, word, len + 1);
1.31 kristaps 330:
331: /* Prohibit truncation. */
332: assert(sv < len + 1);
333:
334: if ( ! man_node_append(m, n))
1.30 kristaps 335: return(0);
1.61 ! kristaps 336:
1.30 kristaps 337: m->next = MAN_NEXT_SIBLING;
338: return(1);
1.1 kristaps 339: }
340:
341:
1.54 kristaps 342: /*
343: * Free all of the resources held by a node. This does NOT unlink a
344: * node from its context; for that, see man_node_unlink().
345: */
346: static void
1.1 kristaps 347: man_node_free(struct man_node *p)
348: {
349:
350: if (p->string)
351: free(p->string);
352: free(p);
353: }
354:
355:
356: void
1.54 kristaps 357: man_node_delete(struct man *m, struct man_node *p)
1.1 kristaps 358: {
359:
1.54 kristaps 360: while (p->child)
361: man_node_delete(m, p->child);
362:
363: man_node_unlink(m, p);
1.1 kristaps 364: man_node_free(p);
365: }
366:
367:
368: static int
369: man_ptext(struct man *m, int line, char *buf)
370: {
1.61 ! kristaps 371: int i;
1.60 kristaps 372:
373: /* Ignore bogus comments. */
374:
375: if ('\\' == buf[0] && '.' == buf[1] && '\"' == buf[2])
376: return(man_pwarn(m, line, 0, WBADCOMMENT));
1.31 kristaps 377:
1.35 kristaps 378: /* Literal free-form text whitespace is preserved. */
379:
380: if (MAN_LITERAL & m->flags) {
381: if ( ! man_word_alloc(m, line, 0, buf))
382: return(0);
383: goto descope;
384: }
385:
1.61 ! kristaps 386: /* Pump blank lines directly into the backend. */
1.31 kristaps 387:
388: for (i = 0; ' ' == buf[i]; i++)
389: /* Skip leading whitespace. */ ;
1.48 kristaps 390:
1.49 kristaps 391: if ('\0' == buf[i]) {
1.61 ! kristaps 392: /* Allocate a blank entry. */
! 393: if ( ! man_word_alloc(m, line, 0, ""))
1.31 kristaps 394: return(0);
395: goto descope;
396: }
397:
1.61 ! kristaps 398: /* Warn if the last un-escaped character is whitespace. */
1.29 kristaps 399:
1.61 ! kristaps 400: i = (int)strlen(buf);
! 401: assert(i);
1.49 kristaps 402:
1.61 ! kristaps 403: if (' ' == buf[i - 1] || '\t' == buf[i - 1])
! 404: if (1 == i || ('\\' != buf[i - 2]))
1.49 kristaps 405: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
406: return(0);
407:
1.61 ! kristaps 408: if ( ! man_word_alloc(m, line, 0, buf))
1.1 kristaps 409: return(0);
1.31 kristaps 410:
411: descope:
1.11 kristaps 412: /*
1.29 kristaps 413: * Co-ordinate what happens with having a next-line scope open:
414: * first close out the element scope (if applicable), then close
415: * out the block scope (also if applicable).
1.11 kristaps 416: */
417:
1.29 kristaps 418: if (MAN_ELINE & m->flags) {
419: m->flags &= ~MAN_ELINE;
1.55 kristaps 420: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.29 kristaps 421: return(0);
422: }
423:
424: if ( ! (MAN_BLINE & m->flags))
1.11 kristaps 425: return(1);
1.29 kristaps 426: m->flags &= ~MAN_BLINE;
1.11 kristaps 427:
1.55 kristaps 428: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.11 kristaps 429: return(0);
1.29 kristaps 430: return(man_body_alloc(m, line, 0, m->last->tok));
1.1 kristaps 431: }
432:
433:
1.43 kristaps 434: static int
435: macrowarn(struct man *m, int ln, const char *buf)
436: {
437: if ( ! (MAN_IGN_MACRO & m->pflags))
438: return(man_verr(m, ln, 0,
439: "unknown macro: %s%s",
440: buf, strlen(buf) > 3 ? "..." : ""));
441: return(man_vwarn(m, ln, 0, "unknown macro: %s%s",
442: buf, strlen(buf) > 3 ? "..." : ""));
443: }
444:
445:
1.1 kristaps 446: int
447: man_pmacro(struct man *m, int ln, char *buf)
448: {
1.58 kristaps 449: int i, j, ppos;
1.53 kristaps 450: enum mant tok;
1.34 kristaps 451: char mac[5];
452: struct man_node *n;
1.1 kristaps 453:
454: /* Comments and empties are quickly ignored. */
455:
1.46 kristaps 456: if ('\0' == buf[1])
457: return(1);
1.1 kristaps 458:
1.9 kristaps 459: i = 1;
460:
1.56 kristaps 461: /*
462: * Skip whitespace between the control character and initial
463: * text. "Whitespace" is both spaces and tabs.
464: */
1.57 kristaps 465: if (' ' == buf[i] || '\t' == buf[i]) {
1.9 kristaps 466: i++;
1.56 kristaps 467: while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
1.1 kristaps 468: i++;
1.48 kristaps 469: if ('\0' == buf[i])
1.11 kristaps 470: goto out;
1.1 kristaps 471: }
472:
1.10 kristaps 473: ppos = i;
474:
1.1 kristaps 475: /* Copy the first word into a nil-terminated buffer. */
476:
1.10 kristaps 477: for (j = 0; j < 4; j++, i++) {
1.48 kristaps 478: if ('\0' == (mac[j] = buf[i]))
1.1 kristaps 479: break;
1.10 kristaps 480: else if (' ' == buf[i])
1.1 kristaps 481: break;
1.38 kristaps 482:
483: /* Check for invalid characters. */
484:
485: if (isgraph((u_char)buf[i]))
486: continue;
487: return(man_perr(m, ln, i, WNPRINT));
1.1 kristaps 488: }
489:
1.46 kristaps 490: mac[j] = '\0';
1.1 kristaps 491:
1.9 kristaps 492: if (j == 4 || j < 1) {
1.7 kristaps 493: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.29 kristaps 494: (void)man_perr(m, ln, ppos, WMACROFORM);
1.7 kristaps 495: goto err;
496: }
1.29 kristaps 497: if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
1.7 kristaps 498: goto err;
1.12 kristaps 499: return(1);
1.7 kristaps 500: }
1.1 kristaps 501:
1.53 kristaps 502: if (MAN_MAX == (tok = man_hash_find(mac))) {
1.43 kristaps 503: if ( ! macrowarn(m, ln, mac))
1.7 kristaps 504: goto err;
1.12 kristaps 505: return(1);
1.1 kristaps 506: }
507:
508: /* The macro is sane. Jump to the next word. */
509:
510: while (buf[i] && ' ' == buf[i])
511: i++;
512:
1.48 kristaps 513: /* Trailing whitespace? */
514:
515: if ('\0' == buf[i] && ' ' == buf[i - 1])
516: if ( ! man_pwarn(m, ln, i - 1, WTSPACE))
517: goto err;
518:
1.50 kristaps 519: /*
1.51 kristaps 520: * Remove prior ELINE macro, as it's being clobbering by a new
521: * macro. Note that NSCOPED macros do not close out ELINE
522: * macros---they don't print text---so we let those slip by.
1.59 kristaps 523: * NOTE: we don't allow roff blocks (NOCLOSE) to be embedded
524: * here because that would stipulate blocks as children of
525: * elements!
1.50 kristaps 526: */
1.34 kristaps 527:
1.53 kristaps 528: if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.51 kristaps 529: m->flags & MAN_ELINE) {
530: assert(MAN_TEXT != m->last->type);
531:
532: /*
533: * This occurs in the following construction:
534: * .B
535: * .br
536: * .B
537: * .br
538: * I hate man macros.
539: * Flat-out disallow this madness.
540: */
541: if (MAN_NSCOPED & man_macros[m->last->tok].flags)
542: return(man_perr(m, ln, ppos, WLNSCOPE));
543:
1.34 kristaps 544: n = m->last;
1.51 kristaps 545:
546: assert(n);
1.34 kristaps 547: assert(NULL == n->child);
1.37 kristaps 548: assert(0 == n->nchild);
1.51 kristaps 549:
1.34 kristaps 550: if ( ! man_nwarn(m, n, WLNSCOPE))
551: return(0);
552:
1.54 kristaps 553: man_node_delete(m, n);
1.34 kristaps 554: m->flags &= ~MAN_ELINE;
555: }
556:
1.59 kristaps 557: /*
558: * Save the fact that we're in the next-line for a block. In
559: * this way, embedded roff instructions can "remember" state
560: * when they exit.
561: */
562:
563: if (MAN_BLINE & m->flags)
564: m->flags |= MAN_BPLINE;
565:
566: /* Call to handler... */
1.1 kristaps 567:
1.53 kristaps 568: assert(man_macros[tok].fp);
569: if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1 kristaps 570: goto err;
571:
1.11 kristaps 572: out:
1.50 kristaps 573: /*
574: * We weren't in a block-line scope when entering the
575: * above-parsed macro, so return.
576: */
577:
1.58 kristaps 578: if ( ! (MAN_BPLINE & m->flags)) {
1.50 kristaps 579: m->flags &= ~MAN_ILINE;
1.29 kristaps 580: return(1);
1.50 kristaps 581: }
1.58 kristaps 582: m->flags &= ~MAN_BPLINE;
1.50 kristaps 583:
584: /*
585: * If we're in a block scope, then allow this macro to slip by
586: * without closing scope around it.
587: */
588:
589: if (MAN_ILINE & m->flags) {
590: m->flags &= ~MAN_ILINE;
591: return(1);
592: }
1.29 kristaps 593:
594: /*
595: * If we've opened a new next-line element scope, then return
596: * now, as the next line will close out the block scope.
597: */
598:
599: if (MAN_ELINE & m->flags)
600: return(1);
601:
602: /* Close out the block scope opened in the prior line. */
1.11 kristaps 603:
1.29 kristaps 604: assert(MAN_BLINE & m->flags);
605: m->flags &= ~MAN_BLINE;
1.11 kristaps 606:
1.55 kristaps 607: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.29 kristaps 608: return(0);
609: return(man_body_alloc(m, ln, 0, m->last->tok));
1.1 kristaps 610:
611: err: /* Error out. */
612:
1.2 kristaps 613: m->flags |= MAN_HALT;
1.1 kristaps 614: return(0);
615: }
1.3 kristaps 616:
1.4 kristaps 617:
618: int
619: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
620: {
621: char buf[256];
622: va_list ap;
623:
624: if (NULL == man->cb.man_err)
625: return(0);
626:
627: va_start(ap, fmt);
628: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
629: va_end(ap);
630: return((*man->cb.man_err)(man->data, ln, pos, buf));
631: }
632:
633:
634: int
635: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
636: {
637: char buf[256];
638: va_list ap;
639:
640: if (NULL == man->cb.man_warn)
641: return(0);
642:
643: va_start(ap, fmt);
644: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
645: va_end(ap);
646: return((*man->cb.man_warn)(man->data, ln, pos, buf));
647: }
648:
649:
1.23 kristaps 650: int
1.27 kristaps 651: man_err(struct man *m, int line, int pos, int iserr, enum merr type)
1.23 kristaps 652: {
653: const char *p;
654:
1.27 kristaps 655: p = __man_merrnames[(int)type];
1.23 kristaps 656: assert(p);
657:
658: if (iserr)
659: return(man_verr(m, line, pos, p));
660:
661: return(man_vwarn(m, line, pos, p));
1.51 kristaps 662: }
663:
664:
1.54 kristaps 665: /*
666: * Unlink a node from its context. If "m" is provided, the last parse
667: * point will also be adjusted accordingly.
668: */
669: static void
1.51 kristaps 670: man_node_unlink(struct man *m, struct man_node *n)
671: {
672:
1.54 kristaps 673: /* Adjust siblings. */
674:
675: if (n->prev)
1.51 kristaps 676: n->prev->next = n->next;
1.54 kristaps 677: if (n->next)
678: n->next->prev = n->prev;
679:
680: /* Adjust parent. */
681:
682: if (n->parent) {
683: n->parent->nchild--;
684: if (n->parent->child == n)
685: n->parent->child = n->prev ? n->prev : n->next;
686: }
687:
688: /* Adjust parse point, if applicable. */
689:
690: if (m && m->last == n) {
691: /*XXX: this can occur when bailing from validation. */
692: /*assert(NULL == n->next);*/
693: if (n->prev) {
1.51 kristaps 694: m->last = n->prev;
695: m->next = MAN_NEXT_SIBLING;
1.54 kristaps 696: } else {
1.51 kristaps 697: m->last = n->parent;
698: m->next = MAN_NEXT_CHILD;
699: }
700: }
701:
1.54 kristaps 702: if (m && m->first == n)
703: m->first = NULL;
1.23 kristaps 704: }
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