Annotation of mandoc/man.c, Revision 1.104
1.104 ! kristaps 1: /* $Id: man.c,v 1.103 2011/03/17 11:56:17 kristaps Exp $ */
1.1 kristaps 2: /*
1.102 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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 <stdarg.h>
25: #include <stdlib.h>
26: #include <stdio.h>
27: #include <string.h>
28:
1.74 kristaps 29: #include "mandoc.h"
1.1 kristaps 30: #include "libman.h"
1.45 kristaps 31: #include "libmandoc.h"
1.1 kristaps 32:
33: const char *const __man_macronames[MAN_MAX] = {
1.21 kristaps 34: "br", "TH", "SH", "SS",
1.1 kristaps 35: "TP", "LP", "PP", "P",
36: "IP", "HP", "SM", "SB",
37: "BI", "IB", "BR", "RB",
1.11 kristaps 38: "R", "B", "I", "IR",
1.92 kristaps 39: "RI", "na", "sp", "nf",
40: "fi", "RE", "RS", "DT",
41: "UC", "PD", "AT", "in",
42: "ft"
1.1 kristaps 43: };
44:
45: const char * const *man_macronames = __man_macronames;
46:
1.97 kristaps 47: static struct man_node *man_node_alloc(struct man *, int, int,
1.53 kristaps 48: enum man_type, enum mant);
1.1 kristaps 49: static int man_node_append(struct man *,
50: struct man_node *);
1.54 kristaps 51: static void man_node_free(struct man_node *);
52: static void man_node_unlink(struct man *,
53: struct man_node *);
1.72 kristaps 54: static int man_ptext(struct man *, int, char *, int);
1.79 kristaps 55: static int man_pmacro(struct man *, int, char *, int);
1.2 kristaps 56: static void man_free1(struct man *);
1.45 kristaps 57: static void man_alloc1(struct man *);
1.94 kristaps 58: static int man_descope(struct man *, int, int);
1.1 kristaps 59:
60:
61: const struct man_node *
1.2 kristaps 62: man_node(const struct man *m)
1.1 kristaps 63: {
64:
1.96 kristaps 65: assert( ! (MAN_HALT & m->flags));
66: return(m->first);
1.1 kristaps 67: }
68:
69:
70: const struct man_meta *
1.2 kristaps 71: man_meta(const struct man *m)
1.1 kristaps 72: {
73:
1.96 kristaps 74: assert( ! (MAN_HALT & m->flags));
75: return(&m->meta);
1.1 kristaps 76: }
77:
78:
1.45 kristaps 79: void
1.1 kristaps 80: man_reset(struct man *man)
81: {
82:
1.2 kristaps 83: man_free1(man);
1.45 kristaps 84: man_alloc1(man);
1.1 kristaps 85: }
86:
87:
88: void
89: man_free(struct man *man)
90: {
91:
1.2 kristaps 92: man_free1(man);
1.1 kristaps 93: free(man);
94: }
95:
96:
97: struct man *
1.104 ! kristaps 98: man_alloc(struct regset *regs, struct mparse *parse)
1.1 kristaps 99: {
100: struct man *p;
101:
1.45 kristaps 102: p = mandoc_calloc(1, sizeof(struct man));
1.2 kristaps 103:
1.40 kristaps 104: man_hash_init();
1.104 ! kristaps 105: p->parse = parse;
1.79 kristaps 106: p->regs = regs;
1.45 kristaps 107:
108: man_alloc1(p);
1.1 kristaps 109: return(p);
110: }
111:
112:
113: int
114: man_endparse(struct man *m)
115: {
116:
1.96 kristaps 117: assert( ! (MAN_HALT & m->flags));
118: if (man_macroend(m))
1.3 kristaps 119: return(1);
120: m->flags |= MAN_HALT;
121: return(0);
1.1 kristaps 122: }
123:
124:
125: int
1.79 kristaps 126: man_parseln(struct man *m, int ln, char *buf, int offs)
1.1 kristaps 127: {
128:
1.97 kristaps 129: m->flags |= MAN_NEWLINE;
130:
1.96 kristaps 131: assert( ! (MAN_HALT & m->flags));
1.72 kristaps 132: return(('.' == buf[offs] || '\'' == buf[offs]) ?
1.79 kristaps 133: man_pmacro(m, ln, buf, offs) :
1.72 kristaps 134: man_ptext(m, ln, buf, offs));
1.1 kristaps 135: }
136:
137:
1.2 kristaps 138: static void
139: man_free1(struct man *man)
140: {
141:
142: if (man->first)
1.54 kristaps 143: man_node_delete(man, man->first);
1.2 kristaps 144: if (man->meta.title)
145: free(man->meta.title);
1.6 kristaps 146: if (man->meta.source)
147: free(man->meta.source);
1.102 schwarze 148: if (man->meta.date)
149: free(man->meta.date);
1.2 kristaps 150: if (man->meta.vol)
151: free(man->meta.vol);
1.68 kristaps 152: if (man->meta.msec)
153: free(man->meta.msec);
1.2 kristaps 154: }
155:
156:
1.45 kristaps 157: static void
1.2 kristaps 158: man_alloc1(struct man *m)
159: {
160:
1.44 kristaps 161: memset(&m->meta, 0, sizeof(struct man_meta));
1.2 kristaps 162: m->flags = 0;
1.45 kristaps 163: m->last = mandoc_calloc(1, sizeof(struct man_node));
1.2 kristaps 164: m->first = m->last;
165: m->last->type = MAN_ROOT;
1.54 kristaps 166: m->last->tok = MAN_MAX;
1.2 kristaps 167: m->next = MAN_NEXT_CHILD;
168: }
169:
170:
1.1 kristaps 171: static int
172: man_node_append(struct man *man, struct man_node *p)
173: {
174:
175: assert(man->last);
176: assert(man->first);
177: assert(MAN_ROOT != p->type);
178:
179: switch (man->next) {
180: case (MAN_NEXT_SIBLING):
181: man->last->next = p;
182: p->prev = man->last;
183: p->parent = man->last->parent;
184: break;
185: case (MAN_NEXT_CHILD):
186: man->last->child = p;
187: p->parent = man->last;
188: break;
189: default:
190: abort();
191: /* NOTREACHED */
192: }
1.22 kristaps 193:
1.54 kristaps 194: assert(p->parent);
1.22 kristaps 195: p->parent->nchild++;
1.1 kristaps 196:
1.29 kristaps 197: if ( ! man_valid_pre(man, p))
198: return(0);
199:
200: switch (p->type) {
201: case (MAN_HEAD):
202: assert(MAN_BLOCK == p->parent->type);
203: p->parent->head = p;
204: break;
205: case (MAN_BODY):
206: assert(MAN_BLOCK == p->parent->type);
207: p->parent->body = p;
208: break;
209: default:
210: break;
211: }
212:
1.2 kristaps 213: man->last = p;
214:
1.1 kristaps 215: switch (p->type) {
1.94 kristaps 216: case (MAN_TBL):
217: /* FALLTHROUGH */
1.2 kristaps 218: case (MAN_TEXT):
219: if ( ! man_valid_post(man))
220: return(0);
1.1 kristaps 221: break;
222: default:
223: break;
224: }
225:
226: return(1);
227: }
228:
229:
230: static struct man_node *
1.97 kristaps 231: man_node_alloc(struct man *m, int line, int pos,
232: enum man_type type, enum mant tok)
1.1 kristaps 233: {
234: struct man_node *p;
235:
1.45 kristaps 236: p = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 237: p->line = line;
238: p->pos = pos;
239: p->type = type;
1.16 kristaps 240: p->tok = tok;
1.97 kristaps 241:
242: if (MAN_NEWLINE & m->flags)
243: p->flags |= MAN_LINE;
244: m->flags &= ~MAN_NEWLINE;
1.1 kristaps 245: return(p);
246: }
247:
248:
249: int
1.53 kristaps 250: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1 kristaps 251: {
252: struct man_node *p;
253:
1.97 kristaps 254: p = man_node_alloc(m, line, pos, MAN_ELEM, tok);
1.30 kristaps 255: if ( ! man_node_append(m, p))
256: return(0);
257: m->next = MAN_NEXT_CHILD;
258: return(1);
1.1 kristaps 259: }
260:
261:
262: int
1.53 kristaps 263: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 264: {
265: struct man_node *p;
266:
1.97 kristaps 267: p = man_node_alloc(m, line, pos, MAN_HEAD, tok);
1.29 kristaps 268: if ( ! man_node_append(m, p))
269: return(0);
270: m->next = MAN_NEXT_CHILD;
271: return(1);
272: }
273:
274:
275: int
1.53 kristaps 276: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 277: {
278: struct man_node *p;
279:
1.97 kristaps 280: p = man_node_alloc(m, line, pos, MAN_BODY, tok);
1.29 kristaps 281: if ( ! man_node_append(m, p))
282: return(0);
283: m->next = MAN_NEXT_CHILD;
284: return(1);
285: }
286:
287:
288: int
1.53 kristaps 289: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 290: {
291: struct man_node *p;
292:
1.97 kristaps 293: p = man_node_alloc(m, line, pos, MAN_BLOCK, tok);
1.29 kristaps 294: if ( ! man_node_append(m, p))
295: return(0);
296: m->next = MAN_NEXT_CHILD;
297: return(1);
298: }
299:
1.61 kristaps 300: int
301: man_word_alloc(struct man *m, int line, int pos, const char *word)
1.1 kristaps 302: {
1.31 kristaps 303: struct man_node *n;
1.61 kristaps 304: size_t sv, len;
305:
306: len = strlen(word);
1.1 kristaps 307:
1.97 kristaps 308: n = man_node_alloc(m, line, pos, MAN_TEXT, MAN_MAX);
1.45 kristaps 309: n->string = mandoc_malloc(len + 1);
1.61 kristaps 310: sv = strlcpy(n->string, word, len + 1);
1.31 kristaps 311:
312: /* Prohibit truncation. */
313: assert(sv < len + 1);
314:
315: if ( ! man_node_append(m, n))
1.30 kristaps 316: return(0);
1.61 kristaps 317:
1.30 kristaps 318: m->next = MAN_NEXT_SIBLING;
319: return(1);
1.1 kristaps 320: }
321:
322:
1.54 kristaps 323: /*
324: * Free all of the resources held by a node. This does NOT unlink a
325: * node from its context; for that, see man_node_unlink().
326: */
327: static void
1.1 kristaps 328: man_node_free(struct man_node *p)
329: {
330:
331: if (p->string)
332: free(p->string);
333: free(p);
334: }
335:
336:
337: void
1.54 kristaps 338: man_node_delete(struct man *m, struct man_node *p)
1.1 kristaps 339: {
340:
1.54 kristaps 341: while (p->child)
342: man_node_delete(m, p->child);
343:
344: man_node_unlink(m, p);
1.1 kristaps 345: man_node_free(p);
346: }
347:
1.101 kristaps 348: int
349: man_addeqn(struct man *m, const struct eqn *ep)
350: {
351: struct man_node *n;
352:
353: assert( ! (MAN_HALT & m->flags));
354:
355: n = man_node_alloc(m, ep->line, ep->pos, MAN_EQN, MAN_MAX);
356: n->eqn = ep;
357:
358: if ( ! man_node_append(m, n))
359: return(0);
360:
361: m->next = MAN_NEXT_SIBLING;
362: return(man_descope(m, ep->line, ep->pos));
363: }
1.1 kristaps 364:
1.94 kristaps 365: int
366: man_addspan(struct man *m, const struct tbl_span *sp)
367: {
1.100 kristaps 368: struct man_node *n;
1.94 kristaps 369:
1.96 kristaps 370: assert( ! (MAN_HALT & m->flags));
1.100 kristaps 371:
372: n = man_node_alloc(m, sp->line, 0, MAN_TBL, MAN_MAX);
373: n->span = sp;
374:
375: if ( ! man_node_append(m, n))
1.94 kristaps 376: return(0);
1.100 kristaps 377:
378: m->next = MAN_NEXT_SIBLING;
1.99 kristaps 379: return(man_descope(m, sp->line, 0));
1.94 kristaps 380: }
381:
382: static int
383: man_descope(struct man *m, int line, int offs)
384: {
385: /*
386: * Co-ordinate what happens with having a next-line scope open:
387: * first close out the element scope (if applicable), then close
388: * out the block scope (also if applicable).
389: */
390:
391: if (MAN_ELINE & m->flags) {
392: m->flags &= ~MAN_ELINE;
393: if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
394: return(0);
395: }
396:
397: if ( ! (MAN_BLINE & m->flags))
398: return(1);
399: m->flags &= ~MAN_BLINE;
400:
401: if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
402: return(0);
403: return(man_body_alloc(m, line, offs, m->last->tok));
404: }
405:
406:
1.1 kristaps 407: static int
1.72 kristaps 408: man_ptext(struct man *m, int line, char *buf, int offs)
1.1 kristaps 409: {
1.61 kristaps 410: int i;
1.60 kristaps 411:
412: /* Ignore bogus comments. */
413:
1.72 kristaps 414: if ('\\' == buf[offs] &&
415: '.' == buf[offs + 1] &&
1.93 kristaps 416: '"' == buf[offs + 2]) {
417: man_pmsg(m, line, offs, MANDOCERR_BADCOMMENT);
418: return(1);
419: }
1.31 kristaps 420:
1.35 kristaps 421: /* Literal free-form text whitespace is preserved. */
422:
423: if (MAN_LITERAL & m->flags) {
1.72 kristaps 424: if ( ! man_word_alloc(m, line, offs, buf + offs))
1.35 kristaps 425: return(0);
1.94 kristaps 426: return(man_descope(m, line, offs));
1.35 kristaps 427: }
428:
1.61 kristaps 429: /* Pump blank lines directly into the backend. */
1.31 kristaps 430:
1.72 kristaps 431: for (i = offs; ' ' == buf[i]; i++)
1.31 kristaps 432: /* Skip leading whitespace. */ ;
1.48 kristaps 433:
1.49 kristaps 434: if ('\0' == buf[i]) {
1.61 kristaps 435: /* Allocate a blank entry. */
1.72 kristaps 436: if ( ! man_word_alloc(m, line, offs, ""))
1.31 kristaps 437: return(0);
1.94 kristaps 438: return(man_descope(m, line, offs));
1.31 kristaps 439: }
440:
1.63 kristaps 441: /*
442: * Warn if the last un-escaped character is whitespace. Then
443: * strip away the remaining spaces (tabs stay!).
444: */
1.29 kristaps 445:
1.61 kristaps 446: i = (int)strlen(buf);
447: assert(i);
1.49 kristaps 448:
1.63 kristaps 449: if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
1.64 kristaps 450: if (i > 1 && '\\' != buf[i - 2])
1.93 kristaps 451: man_pmsg(m, line, i - 1, MANDOCERR_EOLNSPACE);
1.63 kristaps 452:
453: for (--i; i && ' ' == buf[i]; i--)
454: /* Spin back to non-space. */ ;
455:
456: /* Jump ahead of escaped whitespace. */
457: i += '\\' == buf[i] ? 2 : 1;
458:
459: buf[i] = '\0';
460: }
1.49 kristaps 461:
1.72 kristaps 462: if ( ! man_word_alloc(m, line, offs, buf + offs))
1.1 kristaps 463: return(0);
1.65 kristaps 464:
465: /*
466: * End-of-sentence check. If the last character is an unescaped
467: * EOS character, then flag the node as being the end of a
468: * sentence. The front-end will know how to interpret this.
469: */
1.67 kristaps 470:
1.65 kristaps 471: assert(i);
1.83 schwarze 472: if (mandoc_eos(buf, (size_t)i, 0))
1.65 kristaps 473: m->last->flags |= MAN_EOS;
1.31 kristaps 474:
1.94 kristaps 475: return(man_descope(m, line, offs));
1.1 kristaps 476: }
477:
478:
1.96 kristaps 479: static int
1.79 kristaps 480: man_pmacro(struct man *m, int ln, char *buf, int offs)
1.1 kristaps 481: {
1.58 kristaps 482: int i, j, ppos;
1.53 kristaps 483: enum mant tok;
1.34 kristaps 484: char mac[5];
485: struct man_node *n;
1.1 kristaps 486:
487: /* Comments and empties are quickly ignored. */
488:
1.72 kristaps 489: offs++;
490:
491: if ('\0' == buf[offs])
1.46 kristaps 492: return(1);
1.1 kristaps 493:
1.72 kristaps 494: i = offs;
1.9 kristaps 495:
1.56 kristaps 496: /*
497: * Skip whitespace between the control character and initial
498: * text. "Whitespace" is both spaces and tabs.
499: */
1.62 kristaps 500:
1.57 kristaps 501: if (' ' == buf[i] || '\t' == buf[i]) {
1.9 kristaps 502: i++;
1.56 kristaps 503: while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
1.1 kristaps 504: i++;
1.48 kristaps 505: if ('\0' == buf[i])
1.11 kristaps 506: goto out;
1.1 kristaps 507: }
508:
1.10 kristaps 509: ppos = i;
510:
1.86 schwarze 511: /*
512: * Copy the first word into a nil-terminated buffer.
513: * Stop copying when a tab, space, or eoln is encountered.
514: */
1.1 kristaps 515:
1.86 schwarze 516: j = 0;
517: while (j < 4 && '\0' != buf[i] && ' ' != buf[i] && '\t' != buf[i])
518: mac[j++] = buf[i++];
1.46 kristaps 519: mac[j] = '\0';
1.1 kristaps 520:
1.87 schwarze 521: tok = (j > 0 && j < 4) ? man_hash_find(mac) : MAN_MAX;
522: if (MAN_MAX == tok) {
1.104 ! kristaps 523: mandoc_vmsg(MANDOCERR_MACRO, m->parse, ln,
! 524: ppos, "%s", buf + ppos - 1);
1.12 kristaps 525: return(1);
1.1 kristaps 526: }
527:
528: /* The macro is sane. Jump to the next word. */
529:
530: while (buf[i] && ' ' == buf[i])
531: i++;
532:
1.62 kristaps 533: /*
534: * Trailing whitespace. Note that tabs are allowed to be passed
535: * into the parser as "text", so we only warn about spaces here.
536: */
1.48 kristaps 537:
538: if ('\0' == buf[i] && ' ' == buf[i - 1])
1.93 kristaps 539: man_pmsg(m, ln, i - 1, MANDOCERR_EOLNSPACE);
1.48 kristaps 540:
1.50 kristaps 541: /*
1.90 kristaps 542: * Remove prior ELINE macro, as it's being clobbered by a new
1.51 kristaps 543: * macro. Note that NSCOPED macros do not close out ELINE
544: * macros---they don't print text---so we let those slip by.
1.50 kristaps 545: */
1.34 kristaps 546:
1.53 kristaps 547: if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.51 kristaps 548: m->flags & MAN_ELINE) {
1.90 kristaps 549: n = m->last;
550: assert(MAN_TEXT != n->type);
1.51 kristaps 551:
1.90 kristaps 552: /* Remove repeated NSCOPED macros causing ELINE. */
1.51 kristaps 553:
1.90 kristaps 554: if (MAN_NSCOPED & man_macros[n->tok].flags)
555: n = n->parent;
1.51 kristaps 556:
1.104 ! kristaps 557: mandoc_vmsg(MANDOCERR_LINESCOPE, m->parse, n->line,
! 558: n->pos, "%s", man_macronames[n->tok]);
1.34 kristaps 559:
1.54 kristaps 560: man_node_delete(m, n);
1.34 kristaps 561: m->flags &= ~MAN_ELINE;
562: }
563:
1.59 kristaps 564: /*
565: * Save the fact that we're in the next-line for a block. In
566: * this way, embedded roff instructions can "remember" state
567: * when they exit.
568: */
569:
570: if (MAN_BLINE & m->flags)
571: m->flags |= MAN_BPLINE;
572:
573: /* Call to handler... */
1.1 kristaps 574:
1.53 kristaps 575: assert(man_macros[tok].fp);
1.79 kristaps 576: if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1 kristaps 577: goto err;
578:
1.11 kristaps 579: out:
1.50 kristaps 580: /*
581: * We weren't in a block-line scope when entering the
582: * above-parsed macro, so return.
583: */
584:
1.58 kristaps 585: if ( ! (MAN_BPLINE & m->flags)) {
1.50 kristaps 586: m->flags &= ~MAN_ILINE;
1.29 kristaps 587: return(1);
1.50 kristaps 588: }
1.58 kristaps 589: m->flags &= ~MAN_BPLINE;
1.50 kristaps 590:
591: /*
592: * If we're in a block scope, then allow this macro to slip by
593: * without closing scope around it.
594: */
595:
596: if (MAN_ILINE & m->flags) {
597: m->flags &= ~MAN_ILINE;
598: return(1);
599: }
1.29 kristaps 600:
601: /*
602: * If we've opened a new next-line element scope, then return
603: * now, as the next line will close out the block scope.
604: */
605:
606: if (MAN_ELINE & m->flags)
607: return(1);
608:
609: /* Close out the block scope opened in the prior line. */
1.11 kristaps 610:
1.29 kristaps 611: assert(MAN_BLINE & m->flags);
612: m->flags &= ~MAN_BLINE;
1.11 kristaps 613:
1.74 kristaps 614: if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
1.29 kristaps 615: return(0);
1.72 kristaps 616: return(man_body_alloc(m, ln, offs, m->last->tok));
1.1 kristaps 617:
618: err: /* Error out. */
619:
1.2 kristaps 620: m->flags |= MAN_HALT;
1.1 kristaps 621: return(0);
622: }
1.51 kristaps 623:
1.54 kristaps 624: /*
625: * Unlink a node from its context. If "m" is provided, the last parse
626: * point will also be adjusted accordingly.
627: */
628: static void
1.51 kristaps 629: man_node_unlink(struct man *m, struct man_node *n)
630: {
631:
1.54 kristaps 632: /* Adjust siblings. */
633:
634: if (n->prev)
1.51 kristaps 635: n->prev->next = n->next;
1.54 kristaps 636: if (n->next)
637: n->next->prev = n->prev;
638:
639: /* Adjust parent. */
640:
641: if (n->parent) {
642: n->parent->nchild--;
643: if (n->parent->child == n)
644: n->parent->child = n->prev ? n->prev : n->next;
645: }
646:
647: /* Adjust parse point, if applicable. */
648:
649: if (m && m->last == n) {
650: /*XXX: this can occur when bailing from validation. */
651: /*assert(NULL == n->next);*/
652: if (n->prev) {
1.51 kristaps 653: m->last = n->prev;
654: m->next = MAN_NEXT_SIBLING;
1.54 kristaps 655: } else {
1.51 kristaps 656: m->last = n->parent;
657: m->next = MAN_NEXT_CHILD;
658: }
659: }
660:
1.54 kristaps 661: if (m && m->first == n)
662: m->first = NULL;
1.23 kristaps 663: }
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