Annotation of mandoc/man.c, Revision 1.54
1.54 ! kristaps 1: /* $Id: man.c,v 1.53 2010/03/23 21:50:43 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 */
1.27 kristaps 54: };
55:
1.1 kristaps 56: const char *const __man_macronames[MAN_MAX] = {
1.21 kristaps 57: "br", "TH", "SH", "SS",
1.1 kristaps 58: "TP", "LP", "PP", "P",
59: "IP", "HP", "SM", "SB",
60: "BI", "IB", "BR", "RB",
1.11 kristaps 61: "R", "B", "I", "IR",
1.29 kristaps 62: "RI", "na", "i", "sp",
1.30 kristaps 63: "nf", "fi", "r", "RE",
1.52 kristaps 64: "RS", "DT", "UC", "PD",
1.54 ! kristaps 65: "Sp", "Vb", "Ve", "de",
! 66: "dei", "am", "ami", "ig",
! 67: ".",
1.1 kristaps 68: };
69:
70: const char * const *man_macronames = __man_macronames;
71:
1.16 kristaps 72: static struct man_node *man_node_alloc(int, int,
1.53 kristaps 73: enum man_type, enum mant);
1.1 kristaps 74: static int man_node_append(struct man *,
75: struct man_node *);
1.54 ! kristaps 76: static void man_node_free(struct man_node *);
! 77: static void man_node_unlink(struct man *,
! 78: struct man_node *);
1.1 kristaps 79: static int man_ptext(struct man *, int, char *);
80: static int man_pmacro(struct man *, int, char *);
1.2 kristaps 81: static void man_free1(struct man *);
1.45 kristaps 82: static void man_alloc1(struct man *);
1.31 kristaps 83: static int pstring(struct man *, int, int,
84: const char *, size_t);
1.43 kristaps 85: static int macrowarn(struct man *, int, const char *);
1.1 kristaps 86:
87:
88: const struct man_node *
1.2 kristaps 89: man_node(const struct man *m)
1.1 kristaps 90: {
91:
1.2 kristaps 92: return(MAN_HALT & m->flags ? NULL : m->first);
1.1 kristaps 93: }
94:
95:
96: const struct man_meta *
1.2 kristaps 97: man_meta(const struct man *m)
1.1 kristaps 98: {
99:
1.2 kristaps 100: return(MAN_HALT & m->flags ? NULL : &m->meta);
1.1 kristaps 101: }
102:
103:
1.45 kristaps 104: void
1.1 kristaps 105: man_reset(struct man *man)
106: {
107:
1.2 kristaps 108: man_free1(man);
1.45 kristaps 109: man_alloc1(man);
1.1 kristaps 110: }
111:
112:
113: void
114: man_free(struct man *man)
115: {
116:
1.2 kristaps 117: man_free1(man);
1.1 kristaps 118: free(man);
119: }
120:
121:
122: struct man *
1.7 kristaps 123: man_alloc(void *data, int pflags, const struct man_cb *cb)
1.1 kristaps 124: {
125: struct man *p;
126:
1.45 kristaps 127: p = mandoc_calloc(1, sizeof(struct man));
1.2 kristaps 128:
1.45 kristaps 129: if (cb)
130: memcpy(&p->cb, cb, sizeof(struct man_cb));
1.1 kristaps 131:
1.40 kristaps 132: man_hash_init();
1.4 kristaps 133: p->data = data;
1.7 kristaps 134: p->pflags = pflags;
1.45 kristaps 135:
136: man_alloc1(p);
1.1 kristaps 137: return(p);
138: }
139:
140:
141: int
142: man_endparse(struct man *m)
143: {
144:
1.3 kristaps 145: if (MAN_HALT & m->flags)
146: return(0);
147: else if (man_macroend(m))
148: return(1);
149: m->flags |= MAN_HALT;
150: return(0);
1.1 kristaps 151: }
152:
153:
154: int
155: man_parseln(struct man *m, int ln, char *buf)
156: {
157:
158: return('.' == *buf ?
159: man_pmacro(m, ln, buf) :
160: man_ptext(m, ln, buf));
161: }
162:
163:
1.2 kristaps 164: static void
165: man_free1(struct man *man)
166: {
167:
168: if (man->first)
1.54 ! kristaps 169: man_node_delete(man, man->first);
1.2 kristaps 170: if (man->meta.title)
171: free(man->meta.title);
1.6 kristaps 172: if (man->meta.source)
173: free(man->meta.source);
1.2 kristaps 174: if (man->meta.vol)
175: free(man->meta.vol);
176: }
177:
178:
1.45 kristaps 179: static void
1.2 kristaps 180: man_alloc1(struct man *m)
181: {
182:
1.44 kristaps 183: memset(&m->meta, 0, sizeof(struct man_meta));
1.2 kristaps 184: m->flags = 0;
1.45 kristaps 185: m->last = mandoc_calloc(1, sizeof(struct man_node));
1.2 kristaps 186: m->first = m->last;
187: m->last->type = MAN_ROOT;
1.54 ! kristaps 188: m->last->tok = MAN_MAX;
1.2 kristaps 189: m->next = MAN_NEXT_CHILD;
190: }
191:
192:
1.1 kristaps 193: static int
194: man_node_append(struct man *man, struct man_node *p)
195: {
196:
197: assert(man->last);
198: assert(man->first);
199: assert(MAN_ROOT != p->type);
200:
201: switch (man->next) {
202: case (MAN_NEXT_SIBLING):
203: man->last->next = p;
204: p->prev = man->last;
205: p->parent = man->last->parent;
206: break;
207: case (MAN_NEXT_CHILD):
208: man->last->child = p;
209: p->parent = man->last;
210: break;
211: default:
212: abort();
213: /* NOTREACHED */
214: }
1.22 kristaps 215:
1.54 ! kristaps 216: assert(p->parent);
1.22 kristaps 217: p->parent->nchild++;
1.1 kristaps 218:
1.29 kristaps 219: if ( ! man_valid_pre(man, p))
220: return(0);
221:
222: switch (p->type) {
223: case (MAN_HEAD):
224: assert(MAN_BLOCK == p->parent->type);
225: p->parent->head = p;
226: break;
227: case (MAN_BODY):
228: assert(MAN_BLOCK == p->parent->type);
229: p->parent->body = p;
230: break;
231: default:
232: break;
233: }
234:
1.2 kristaps 235: man->last = p;
236:
1.1 kristaps 237: switch (p->type) {
1.2 kristaps 238: case (MAN_TEXT):
239: if ( ! man_valid_post(man))
240: return(0);
241: if ( ! man_action_post(man))
242: return(0);
1.1 kristaps 243: break;
244: default:
245: break;
246: }
247:
248: return(1);
249: }
250:
251:
252: static struct man_node *
1.53 kristaps 253: man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
1.1 kristaps 254: {
255: struct man_node *p;
256:
1.45 kristaps 257: p = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 258: p->line = line;
259: p->pos = pos;
260: p->type = type;
1.16 kristaps 261: p->tok = tok;
1.1 kristaps 262: return(p);
263: }
264:
265:
266: int
1.53 kristaps 267: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1 kristaps 268: {
269: struct man_node *p;
270:
1.16 kristaps 271: p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.30 kristaps 272: if ( ! man_node_append(m, p))
273: return(0);
274: m->next = MAN_NEXT_CHILD;
275: return(1);
1.1 kristaps 276: }
277:
278:
279: int
1.53 kristaps 280: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 281: {
282: struct man_node *p;
283:
284: p = man_node_alloc(line, pos, MAN_HEAD, tok);
285: if ( ! man_node_append(m, p))
286: return(0);
287: m->next = MAN_NEXT_CHILD;
288: return(1);
289: }
290:
291:
292: int
1.53 kristaps 293: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 294: {
295: struct man_node *p;
296:
297: p = man_node_alloc(line, pos, MAN_BODY, tok);
298: if ( ! man_node_append(m, p))
299: return(0);
300: m->next = MAN_NEXT_CHILD;
301: return(1);
302: }
303:
304:
305: int
1.53 kristaps 306: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 307: {
308: struct man_node *p;
309:
310: p = man_node_alloc(line, pos, MAN_BLOCK, tok);
311: if ( ! man_node_append(m, p))
312: return(0);
313: m->next = MAN_NEXT_CHILD;
314: return(1);
315: }
316:
317:
1.31 kristaps 318: static int
319: pstring(struct man *m, int line, int pos,
320: const char *p, size_t len)
1.1 kristaps 321: {
1.31 kristaps 322: struct man_node *n;
323: size_t sv;
1.1 kristaps 324:
1.53 kristaps 325: n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
1.45 kristaps 326: n->string = mandoc_malloc(len + 1);
1.31 kristaps 327: sv = strlcpy(n->string, p, len + 1);
328:
329: /* Prohibit truncation. */
330: assert(sv < len + 1);
331:
332: if ( ! man_node_append(m, n))
1.30 kristaps 333: return(0);
334: m->next = MAN_NEXT_SIBLING;
335: return(1);
1.1 kristaps 336: }
337:
338:
1.31 kristaps 339: int
340: man_word_alloc(struct man *m, int line, int pos, const char *word)
341: {
342:
343: return(pstring(m, line, pos, word, strlen(word)));
344: }
345:
346:
1.54 ! kristaps 347: /*
! 348: * Free all of the resources held by a node. This does NOT unlink a
! 349: * node from its context; for that, see man_node_unlink().
! 350: */
! 351: static void
1.1 kristaps 352: man_node_free(struct man_node *p)
353: {
354:
355: if (p->string)
356: free(p->string);
357: free(p);
358: }
359:
360:
361: void
1.54 ! kristaps 362: man_node_delete(struct man *m, struct man_node *p)
1.1 kristaps 363: {
364:
1.54 ! kristaps 365: while (p->child)
! 366: man_node_delete(m, p->child);
! 367:
! 368: man_node_unlink(m, p);
1.1 kristaps 369: man_node_free(p);
370: }
371:
372:
373: static int
374: man_ptext(struct man *m, int line, char *buf)
375: {
1.31 kristaps 376: int i, j;
1.49 kristaps 377: char sv;
1.31 kristaps 378:
1.35 kristaps 379: /* Literal free-form text whitespace is preserved. */
380:
381: if (MAN_LITERAL & m->flags) {
382: if ( ! man_word_alloc(m, line, 0, buf))
383: return(0);
384: goto descope;
385: }
386:
1.31 kristaps 387: /* First de-chunk and allocate words. */
388:
389: for (i = 0; ' ' == buf[i]; i++)
390: /* Skip leading whitespace. */ ;
1.48 kristaps 391:
1.49 kristaps 392: if ('\0' == buf[i]) {
393: /* Trailing whitespace? */
394: if (i && ' ' == buf[i - 1])
395: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
396: return(0);
1.31 kristaps 397: if ( ! pstring(m, line, 0, &buf[i], 0))
398: return(0);
399: goto descope;
400: }
401:
402: for (j = i; buf[i]; i++) {
403: if (' ' != buf[i])
404: continue;
405:
406: /* Escaped whitespace. */
407: if (i && ' ' == buf[i] && '\\' == buf[i - 1])
408: continue;
1.1 kristaps 409:
1.49 kristaps 410: sv = buf[i];
411: buf[i++] = '\0';
412:
1.31 kristaps 413: if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
414: return(0);
1.29 kristaps 415:
1.49 kristaps 416: /* Trailing whitespace? Check at overwritten byte. */
417:
418: if (' ' == sv && '\0' == buf[i])
419: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
420: return(0);
421:
1.31 kristaps 422: for ( ; ' ' == buf[i]; i++)
423: /* Skip trailing whitespace. */ ;
1.30 kristaps 424:
1.31 kristaps 425: j = i;
1.49 kristaps 426:
427: /* Trailing whitespace? */
428:
429: if (' ' == buf[i - 1] && '\0' == buf[i])
430: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
431: return(0);
432:
433: if ('\0' == buf[i])
1.31 kristaps 434: break;
435: }
436:
437: if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.1 kristaps 438: return(0);
1.31 kristaps 439:
440: descope:
1.11 kristaps 441:
442: /*
1.29 kristaps 443: * Co-ordinate what happens with having a next-line scope open:
444: * first close out the element scope (if applicable), then close
445: * out the block scope (also if applicable).
1.11 kristaps 446: */
447:
1.29 kristaps 448: if (MAN_ELINE & m->flags) {
449: m->flags &= ~MAN_ELINE;
450: if ( ! man_unscope(m, m->last->parent))
451: return(0);
452: }
453:
454: if ( ! (MAN_BLINE & m->flags))
1.11 kristaps 455: return(1);
1.29 kristaps 456: m->flags &= ~MAN_BLINE;
1.11 kristaps 457:
1.29 kristaps 458: if ( ! man_unscope(m, m->last->parent))
1.11 kristaps 459: return(0);
1.29 kristaps 460: return(man_body_alloc(m, line, 0, m->last->tok));
1.1 kristaps 461: }
462:
463:
1.43 kristaps 464: static int
465: macrowarn(struct man *m, int ln, const char *buf)
466: {
467: if ( ! (MAN_IGN_MACRO & m->pflags))
468: return(man_verr(m, ln, 0,
469: "unknown macro: %s%s",
470: buf, strlen(buf) > 3 ? "..." : ""));
471: return(man_vwarn(m, ln, 0, "unknown macro: %s%s",
472: buf, strlen(buf) > 3 ? "..." : ""));
473: }
474:
475:
1.1 kristaps 476: int
477: man_pmacro(struct man *m, int ln, char *buf)
478: {
1.53 kristaps 479: int i, j, ppos, fl;
480: enum mant tok;
1.34 kristaps 481: char mac[5];
482: struct man_node *n;
1.1 kristaps 483:
484: /* Comments and empties are quickly ignored. */
485:
1.29 kristaps 486: fl = m->flags;
1.11 kristaps 487:
1.46 kristaps 488: if ('\0' == buf[1])
489: return(1);
1.1 kristaps 490:
1.9 kristaps 491: i = 1;
492:
493: if (' ' == buf[i]) {
494: i++;
1.1 kristaps 495: while (buf[i] && ' ' == buf[i])
496: i++;
1.48 kristaps 497: if ('\0' == buf[i])
1.11 kristaps 498: goto out;
1.1 kristaps 499: }
500:
1.10 kristaps 501: ppos = i;
502:
1.1 kristaps 503: /* Copy the first word into a nil-terminated buffer. */
504:
1.10 kristaps 505: for (j = 0; j < 4; j++, i++) {
1.48 kristaps 506: if ('\0' == (mac[j] = buf[i]))
1.1 kristaps 507: break;
1.10 kristaps 508: else if (' ' == buf[i])
1.1 kristaps 509: break;
1.38 kristaps 510:
511: /* Check for invalid characters. */
512:
513: if (isgraph((u_char)buf[i]))
514: continue;
515: return(man_perr(m, ln, i, WNPRINT));
1.1 kristaps 516: }
517:
1.46 kristaps 518: mac[j] = '\0';
1.1 kristaps 519:
1.9 kristaps 520: if (j == 4 || j < 1) {
1.7 kristaps 521: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.29 kristaps 522: (void)man_perr(m, ln, ppos, WMACROFORM);
1.7 kristaps 523: goto err;
524: }
1.29 kristaps 525: if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
1.7 kristaps 526: goto err;
1.12 kristaps 527: return(1);
1.7 kristaps 528: }
1.1 kristaps 529:
1.53 kristaps 530: if (MAN_MAX == (tok = man_hash_find(mac))) {
1.43 kristaps 531: if ( ! macrowarn(m, ln, mac))
1.7 kristaps 532: goto err;
1.12 kristaps 533: return(1);
1.1 kristaps 534: }
535:
536: /* The macro is sane. Jump to the next word. */
537:
538: while (buf[i] && ' ' == buf[i])
539: i++;
540:
1.48 kristaps 541: /* Trailing whitespace? */
542:
543: if ('\0' == buf[i] && ' ' == buf[i - 1])
544: if ( ! man_pwarn(m, ln, i - 1, WTSPACE))
545: goto err;
546:
1.50 kristaps 547: /*
1.51 kristaps 548: * Remove prior ELINE macro, as it's being clobbering by a new
549: * macro. Note that NSCOPED macros do not close out ELINE
550: * macros---they don't print text---so we let those slip by.
1.50 kristaps 551: */
1.34 kristaps 552:
1.53 kristaps 553: if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.51 kristaps 554: m->flags & MAN_ELINE) {
555: assert(MAN_TEXT != m->last->type);
556:
557: /*
558: * This occurs in the following construction:
559: * .B
560: * .br
561: * .B
562: * .br
563: * I hate man macros.
564: * Flat-out disallow this madness.
565: */
566: if (MAN_NSCOPED & man_macros[m->last->tok].flags)
567: return(man_perr(m, ln, ppos, WLNSCOPE));
568:
1.34 kristaps 569: n = m->last;
1.51 kristaps 570:
571: assert(n);
1.34 kristaps 572: assert(NULL == n->child);
1.37 kristaps 573: assert(0 == n->nchild);
1.51 kristaps 574:
1.34 kristaps 575: if ( ! man_nwarn(m, n, WLNSCOPE))
576: return(0);
577:
1.54 ! kristaps 578: man_node_delete(m, n);
1.34 kristaps 579: m->flags &= ~MAN_ELINE;
580: }
581:
1.1 kristaps 582: /* Begin recursive parse sequence. */
583:
1.53 kristaps 584: assert(man_macros[tok].fp);
1.29 kristaps 585:
1.53 kristaps 586: if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1 kristaps 587: goto err;
588:
1.11 kristaps 589: out:
1.50 kristaps 590: /*
591: * We weren't in a block-line scope when entering the
592: * above-parsed macro, so return.
1.54 ! kristaps 593: *
! 594: * FIXME: this prohibits the nesting of blocks (e.g., `de' and
! 595: * family) within BLINE or ELINE systems. This is annoying.
1.50 kristaps 596: */
597:
598: if ( ! (MAN_BLINE & fl)) {
599: m->flags &= ~MAN_ILINE;
1.29 kristaps 600: return(1);
1.50 kristaps 601: }
602:
603: /*
604: * If we're in a block scope, then allow this macro to slip by
605: * without closing scope around it.
606: */
607:
608: if (MAN_ILINE & m->flags) {
609: m->flags &= ~MAN_ILINE;
610: return(1);
611: }
1.29 kristaps 612:
613: /*
614: * If we've opened a new next-line element scope, then return
615: * now, as the next line will close out the block scope.
616: */
617:
618: if (MAN_ELINE & m->flags)
619: return(1);
620:
621: /* Close out the block scope opened in the prior line. */
1.11 kristaps 622:
1.29 kristaps 623: assert(MAN_BLINE & m->flags);
624: m->flags &= ~MAN_BLINE;
1.11 kristaps 625:
1.29 kristaps 626: if ( ! man_unscope(m, m->last->parent))
627: return(0);
628: return(man_body_alloc(m, ln, 0, m->last->tok));
1.1 kristaps 629:
630: err: /* Error out. */
631:
1.2 kristaps 632: m->flags |= MAN_HALT;
1.1 kristaps 633: return(0);
634: }
1.3 kristaps 635:
1.4 kristaps 636:
637: int
638: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
639: {
640: char buf[256];
641: va_list ap;
642:
643: if (NULL == man->cb.man_err)
644: return(0);
645:
646: va_start(ap, fmt);
647: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
648: va_end(ap);
649: return((*man->cb.man_err)(man->data, ln, pos, buf));
650: }
651:
652:
653: int
654: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
655: {
656: char buf[256];
657: va_list ap;
658:
659: if (NULL == man->cb.man_warn)
660: return(0);
661:
662: va_start(ap, fmt);
663: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
664: va_end(ap);
665: return((*man->cb.man_warn)(man->data, ln, pos, buf));
666: }
667:
668:
1.23 kristaps 669: int
1.27 kristaps 670: man_err(struct man *m, int line, int pos, int iserr, enum merr type)
1.23 kristaps 671: {
672: const char *p;
673:
1.27 kristaps 674: p = __man_merrnames[(int)type];
1.23 kristaps 675: assert(p);
676:
677: if (iserr)
678: return(man_verr(m, line, pos, p));
679:
680: return(man_vwarn(m, line, pos, p));
1.51 kristaps 681: }
682:
683:
1.54 ! kristaps 684: /*
! 685: * Unlink a node from its context. If "m" is provided, the last parse
! 686: * point will also be adjusted accordingly.
! 687: */
! 688: static void
1.51 kristaps 689: man_node_unlink(struct man *m, struct man_node *n)
690: {
691:
1.54 ! kristaps 692: /* Adjust siblings. */
! 693:
! 694: if (n->prev)
1.51 kristaps 695: n->prev->next = n->next;
1.54 ! kristaps 696: if (n->next)
! 697: n->next->prev = n->prev;
! 698:
! 699: /* Adjust parent. */
! 700:
! 701: if (n->parent) {
! 702: n->parent->nchild--;
! 703: if (n->parent->child == n)
! 704: n->parent->child = n->prev ? n->prev : n->next;
! 705: }
! 706:
! 707: /* Adjust parse point, if applicable. */
! 708:
! 709: if (m && m->last == n) {
! 710: /*XXX: this can occur when bailing from validation. */
! 711: /*assert(NULL == n->next);*/
! 712: if (n->prev) {
1.51 kristaps 713: m->last = n->prev;
714: m->next = MAN_NEXT_SIBLING;
1.54 ! kristaps 715: } else {
1.51 kristaps 716: m->last = n->parent;
717: m->next = MAN_NEXT_CHILD;
718: }
719: }
720:
1.54 ! kristaps 721: if (m && m->first == n)
! 722: m->first = NULL;
1.23 kristaps 723: }
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