Annotation of src/usr.bin/mandoc/man.c, Revision 1.29
1.29 ! schwarze 1: /* $Id: man.c,v 1.28 2010/05/14 19:52:43 schwarze Exp $ */
1.1 kristaps 2: /*
1.2 schwarze 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
1.2 schwarze 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: *
1.2 schwarze 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: */
1.14 schwarze 17: #include <sys/types.h>
18:
1.1 kristaps 19: #include <assert.h>
20: #include <ctype.h>
21: #include <stdarg.h>
22: #include <stdlib.h>
23: #include <stdio.h>
24: #include <string.h>
25:
26: #include "libman.h"
1.16 schwarze 27: #include "libmandoc.h"
1.1 kristaps 28:
1.7 schwarze 29: const char *const __man_merrnames[WERRMAX] = {
30: "invalid character", /* WNPRINT */
31: "invalid date format", /* WDATE */
32: "scope of prior line violated", /* WLNSCOPE */
1.21 schwarze 33: "over-zealous prior line scope violation", /* WLNSCOPE2 */
1.7 schwarze 34: "trailing whitespace", /* WTSPACE */
35: "unterminated quoted parameter", /* WTQUOTE */
36: "document has no body", /* WNODATA */
37: "document has no title/section", /* WNOTITLE */
38: "invalid escape sequence", /* WESCAPE */
1.8 schwarze 39: "invalid number format", /* WNUMFMT */
1.9 schwarze 40: "expected block head arguments", /* WHEADARGS */
41: "expected block body arguments", /* WBODYARGS */
42: "expected empty block head", /* WNHEADARGS */
43: "ill-formed macro", /* WMACROFORM */
1.10 schwarze 44: "scope open on exit", /* WEXITSCOPE */
45: "no scope context", /* WNOSCOPE */
46: "literal context already open", /* WOLITERAL */
1.22 schwarze 47: "no literal context open", /* WNLITERAL */
48: "invalid nesting of roff declarations", /* WROFFNEST */
1.23 schwarze 49: "scope in roff instructions broken", /* WROFFSCOPE */
50: "document title should be uppercase", /* WTITLECASE */
1.26 schwarze 51: "deprecated comment style", /* WBADCOMMENT */
1.7 schwarze 52: };
53:
1.1 kristaps 54: const char *const __man_macronames[MAN_MAX] = {
1.3 schwarze 55: "br", "TH", "SH", "SS",
1.1 kristaps 56: "TP", "LP", "PP", "P",
57: "IP", "HP", "SM", "SB",
58: "BI", "IB", "BR", "RB",
59: "R", "B", "I", "IR",
1.9 schwarze 60: "RI", "na", "i", "sp",
1.10 schwarze 61: "nf", "fi", "r", "RE",
1.20 schwarze 62: "RS", "DT", "UC", "PD",
1.22 schwarze 63: "Sp", "Vb", "Ve", "de",
64: "dei", "am", "ami", "ig",
1.25 schwarze 65: ".", "if", "ie", "el",
1.1 kristaps 66: };
67:
68: const char * const *man_macronames = __man_macronames;
69:
70: static struct man_node *man_node_alloc(int, int,
1.22 schwarze 71: enum man_type, enum mant);
1.1 kristaps 72: static int man_node_append(struct man *,
73: struct man_node *);
1.22 schwarze 74: static void man_node_free(struct man_node *);
75: static void man_node_unlink(struct man *,
76: struct man_node *);
1.1 kristaps 77: static int man_ptext(struct man *, int, char *);
78: static int man_pmacro(struct man *, int, char *);
79: static void man_free1(struct man *);
1.16 schwarze 80: static void man_alloc1(struct man *);
1.15 schwarze 81: static int macrowarn(struct man *, int, const char *);
1.1 kristaps 82:
83:
84: const struct man_node *
85: man_node(const struct man *m)
86: {
87:
88: return(MAN_HALT & m->flags ? NULL : m->first);
89: }
90:
91:
92: const struct man_meta *
93: man_meta(const struct man *m)
94: {
95:
96: return(MAN_HALT & m->flags ? NULL : &m->meta);
97: }
98:
99:
1.16 schwarze 100: void
1.1 kristaps 101: man_reset(struct man *man)
102: {
103:
104: man_free1(man);
1.16 schwarze 105: man_alloc1(man);
1.1 kristaps 106: }
107:
108:
109: void
110: man_free(struct man *man)
111: {
112:
113: man_free1(man);
114: free(man);
115: }
116:
117:
118: struct man *
119: man_alloc(void *data, int pflags, const struct man_cb *cb)
120: {
121: struct man *p;
122:
1.16 schwarze 123: p = mandoc_calloc(1, sizeof(struct man));
1.1 kristaps 124:
1.16 schwarze 125: if (cb)
126: memcpy(&p->cb, cb, sizeof(struct man_cb));
1.1 kristaps 127:
1.13 schwarze 128: man_hash_init();
1.1 kristaps 129: p->data = data;
130: p->pflags = pflags;
1.16 schwarze 131:
132: man_alloc1(p);
1.1 kristaps 133: return(p);
134: }
135:
136:
137: int
138: man_endparse(struct man *m)
139: {
140:
141: if (MAN_HALT & m->flags)
142: return(0);
143: else if (man_macroend(m))
144: return(1);
145: m->flags |= MAN_HALT;
146: return(0);
147: }
148:
149:
150: int
151: man_parseln(struct man *m, int ln, char *buf)
152: {
1.25 schwarze 153: char *p;
154: size_t len;
155: int brace_close = 0;
156:
157: if ((len = strlen(buf)) > 1) {
158: p = buf + (len - 2);
159: if (p[0] == '\\' && p[1] == '}') {
160: brace_close = 1;
161: *p = '\0';
162: }
163: }
164:
165: if ('.' == *buf || '\'' == *buf) {
166: if ( ! man_pmacro(m, ln, buf))
167: return(0);
168: } else {
169: if ( ! man_ptext(m, ln, buf))
170: return(0);
171: }
1.1 kristaps 172:
1.25 schwarze 173: return(brace_close ? man_brace_close(m, ln, len-2) : 1);
1.1 kristaps 174: }
175:
176:
177: static void
178: man_free1(struct man *man)
179: {
180:
181: if (man->first)
1.22 schwarze 182: man_node_delete(man, man->first);
1.1 kristaps 183: if (man->meta.title)
184: free(man->meta.title);
185: if (man->meta.source)
186: free(man->meta.source);
187: if (man->meta.vol)
188: free(man->meta.vol);
1.29 ! schwarze 189: if (man->meta.msec)
! 190: free(man->meta.msec);
1.1 kristaps 191: }
192:
193:
1.16 schwarze 194: static void
1.1 kristaps 195: man_alloc1(struct man *m)
196: {
197:
1.16 schwarze 198: memset(&m->meta, 0, sizeof(struct man_meta));
1.1 kristaps 199: m->flags = 0;
1.16 schwarze 200: m->last = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 201: m->first = m->last;
202: m->last->type = MAN_ROOT;
1.22 schwarze 203: m->last->tok = MAN_MAX;
1.1 kristaps 204: m->next = MAN_NEXT_CHILD;
205: }
206:
207:
208: static int
209: man_node_append(struct man *man, struct man_node *p)
210: {
211:
212: assert(man->last);
213: assert(man->first);
214: assert(MAN_ROOT != p->type);
215:
216: switch (man->next) {
217: case (MAN_NEXT_SIBLING):
218: man->last->next = p;
219: p->prev = man->last;
220: p->parent = man->last->parent;
221: break;
222: case (MAN_NEXT_CHILD):
223: man->last->child = p;
224: p->parent = man->last;
225: break;
226: default:
227: abort();
228: /* NOTREACHED */
229: }
1.5 schwarze 230:
1.22 schwarze 231: assert(p->parent);
1.5 schwarze 232: p->parent->nchild++;
1.1 kristaps 233:
1.9 schwarze 234: if ( ! man_valid_pre(man, p))
235: return(0);
236:
237: switch (p->type) {
238: case (MAN_HEAD):
239: assert(MAN_BLOCK == p->parent->type);
240: p->parent->head = p;
241: break;
242: case (MAN_BODY):
243: assert(MAN_BLOCK == p->parent->type);
244: p->parent->body = p;
245: break;
246: default:
247: break;
248: }
249:
1.1 kristaps 250: man->last = p;
251:
252: switch (p->type) {
253: case (MAN_TEXT):
254: if ( ! man_valid_post(man))
255: return(0);
256: if ( ! man_action_post(man))
257: return(0);
258: break;
259: default:
260: break;
261: }
262:
263: return(1);
264: }
265:
266:
267: static struct man_node *
1.22 schwarze 268: man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
1.1 kristaps 269: {
270: struct man_node *p;
271:
1.16 schwarze 272: p = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 273: p->line = line;
274: p->pos = pos;
275: p->type = type;
276: p->tok = tok;
277: return(p);
278: }
279:
280:
281: int
1.22 schwarze 282: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1 kristaps 283: {
284: struct man_node *p;
285:
286: p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.10 schwarze 287: if ( ! man_node_append(m, p))
288: return(0);
289: m->next = MAN_NEXT_CHILD;
290: return(1);
1.1 kristaps 291: }
292:
293:
294: int
1.22 schwarze 295: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 296: {
297: struct man_node *p;
298:
299: p = man_node_alloc(line, pos, MAN_HEAD, tok);
300: if ( ! man_node_append(m, p))
301: return(0);
302: m->next = MAN_NEXT_CHILD;
303: return(1);
304: }
305:
306:
307: int
1.22 schwarze 308: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 309: {
310: struct man_node *p;
311:
312: p = man_node_alloc(line, pos, MAN_BODY, tok);
313: if ( ! man_node_append(m, p))
314: return(0);
315: m->next = MAN_NEXT_CHILD;
316: return(1);
317: }
318:
319:
320: int
1.22 schwarze 321: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 322: {
323: struct man_node *p;
324:
325: p = man_node_alloc(line, pos, MAN_BLOCK, tok);
326: if ( ! man_node_append(m, p))
327: return(0);
328: m->next = MAN_NEXT_CHILD;
329: return(1);
330: }
331:
332:
1.27 schwarze 333: int
334: man_word_alloc(struct man *m, int line, int pos, const char *word)
1.1 kristaps 335: {
1.10 schwarze 336: struct man_node *n;
1.27 schwarze 337: size_t sv, len;
338:
339: len = strlen(word);
1.1 kristaps 340:
1.22 schwarze 341: n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
1.16 schwarze 342: n->string = mandoc_malloc(len + 1);
1.27 schwarze 343: sv = strlcpy(n->string, word, len + 1);
1.10 schwarze 344:
345: /* Prohibit truncation. */
346: assert(sv < len + 1);
347:
348: if ( ! man_node_append(m, n))
1.1 kristaps 349: return(0);
1.27 schwarze 350:
1.10 schwarze 351: m->next = MAN_NEXT_SIBLING;
352: return(1);
353: }
354:
355:
1.22 schwarze 356: /*
357: * Free all of the resources held by a node. This does NOT unlink a
358: * node from its context; for that, see man_node_unlink().
359: */
360: static void
1.1 kristaps 361: man_node_free(struct man_node *p)
362: {
363:
364: if (p->string)
365: free(p->string);
366: free(p);
367: }
368:
369:
370: void
1.22 schwarze 371: man_node_delete(struct man *m, struct man_node *p)
1.1 kristaps 372: {
373:
1.22 schwarze 374: while (p->child)
375: man_node_delete(m, p->child);
376:
377: man_node_unlink(m, p);
1.1 kristaps 378: man_node_free(p);
379: }
380:
381:
382: static int
383: man_ptext(struct man *m, int line, char *buf)
384: {
1.27 schwarze 385: int i;
1.26 schwarze 386:
387: /* Ignore bogus comments. */
388:
389: if ('\\' == buf[0] && '.' == buf[1] && '\"' == buf[2])
390: return(man_pwarn(m, line, 0, WBADCOMMENT));
1.10 schwarze 391:
392: /* Literal free-form text whitespace is preserved. */
393:
394: if (MAN_LITERAL & m->flags) {
395: if ( ! man_word_alloc(m, line, 0, buf))
396: return(0);
397: goto descope;
398: }
399:
1.27 schwarze 400: /* Pump blank lines directly into the backend. */
1.10 schwarze 401:
402: for (i = 0; ' ' == buf[i]; i++)
403: /* Skip leading whitespace. */ ;
1.18 schwarze 404:
405: if ('\0' == buf[i]) {
1.27 schwarze 406: /* Allocate a blank entry. */
407: if ( ! man_word_alloc(m, line, 0, ""))
1.10 schwarze 408: return(0);
409: goto descope;
410: }
1.1 kristaps 411:
1.27 schwarze 412: /*
413: * Warn if the last un-escaped character is whitespace. Then
414: * strip away the remaining spaces (tabs stay!).
415: */
1.18 schwarze 416:
1.27 schwarze 417: i = (int)strlen(buf);
418: assert(i);
1.18 schwarze 419:
1.27 schwarze 420: if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
421: if (i > 1 && '\\' != buf[i - 2])
1.18 schwarze 422: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
423: return(0);
424:
1.27 schwarze 425: for (--i; i && ' ' == buf[i]; i--)
426: /* Spin back to non-space. */ ;
1.10 schwarze 427:
1.27 schwarze 428: /* Jump ahead of escaped whitespace. */
429: i += '\\' == buf[i] ? 2 : 1;
1.18 schwarze 430:
1.27 schwarze 431: buf[i] = '\0';
1.10 schwarze 432: }
1.9 schwarze 433:
1.27 schwarze 434: if ( ! man_word_alloc(m, line, 0, buf))
1.1 kristaps 435: return(0);
1.28 schwarze 436:
437: /*
438: * End-of-sentence check. If the last character is an unescaped
439: * EOS character, then flag the node as being the end of a
440: * sentence. The front-end will know how to interpret this.
441: */
442:
443: assert(i);
444:
445: if (mandoc_eos(buf, (size_t)i))
446: m->last->flags |= MAN_EOS;
1.10 schwarze 447:
448: descope:
1.1 kristaps 449: /*
1.9 schwarze 450: * Co-ordinate what happens with having a next-line scope open:
451: * first close out the element scope (if applicable), then close
452: * out the block scope (also if applicable).
1.1 kristaps 453: */
454:
1.9 schwarze 455: if (MAN_ELINE & m->flags) {
456: m->flags &= ~MAN_ELINE;
1.23 schwarze 457: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.9 schwarze 458: return(0);
459: }
460:
461: if ( ! (MAN_BLINE & m->flags))
1.1 kristaps 462: return(1);
1.9 schwarze 463: m->flags &= ~MAN_BLINE;
1.1 kristaps 464:
1.23 schwarze 465: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.1 kristaps 466: return(0);
1.9 schwarze 467: return(man_body_alloc(m, line, 0, m->last->tok));
1.1 kristaps 468: }
469:
470:
1.15 schwarze 471: static int
472: macrowarn(struct man *m, int ln, const char *buf)
473: {
474: if ( ! (MAN_IGN_MACRO & m->pflags))
1.27 schwarze 475: return(man_verr(m, ln, 0, "unknown macro: %s%s",
1.15 schwarze 476: buf, strlen(buf) > 3 ? "..." : ""));
477: return(man_vwarn(m, ln, 0, "unknown macro: %s%s",
478: buf, strlen(buf) > 3 ? "..." : ""));
479: }
480:
481:
1.1 kristaps 482: int
483: man_pmacro(struct man *m, int ln, char *buf)
484: {
1.24 schwarze 485: int i, j, ppos;
1.22 schwarze 486: enum mant tok;
1.10 schwarze 487: char mac[5];
488: struct man_node *n;
1.1 kristaps 489:
490: /* Comments and empties are quickly ignored. */
491:
1.17 schwarze 492: if ('\0' == buf[1])
493: return(1);
1.1 kristaps 494:
495: i = 1;
496:
1.23 schwarze 497: /*
498: * Skip whitespace between the control character and initial
499: * text. "Whitespace" is both spaces and tabs.
500: */
1.27 schwarze 501:
1.23 schwarze 502: if (' ' == buf[i] || '\t' == buf[i]) {
1.1 kristaps 503: i++;
1.23 schwarze 504: while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
1.1 kristaps 505: i++;
1.18 schwarze 506: if ('\0' == buf[i])
1.1 kristaps 507: goto out;
508: }
509:
510: ppos = i;
511:
512: /* Copy the first word into a nil-terminated buffer. */
513:
514: for (j = 0; j < 4; j++, i++) {
1.18 schwarze 515: if ('\0' == (mac[j] = buf[i]))
1.1 kristaps 516: break;
517: else if (' ' == buf[i])
518: break;
1.11 schwarze 519:
520: /* Check for invalid characters. */
521:
522: if (isgraph((u_char)buf[i]))
523: continue;
524: return(man_perr(m, ln, i, WNPRINT));
1.1 kristaps 525: }
526:
1.17 schwarze 527: mac[j] = '\0';
1.1 kristaps 528:
529: if (j == 4 || j < 1) {
530: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.9 schwarze 531: (void)man_perr(m, ln, ppos, WMACROFORM);
1.1 kristaps 532: goto err;
533: }
1.9 schwarze 534: if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
1.1 kristaps 535: goto err;
536: return(1);
537: }
538:
1.22 schwarze 539: if (MAN_MAX == (tok = man_hash_find(mac))) {
1.15 schwarze 540: if ( ! macrowarn(m, ln, mac))
1.1 kristaps 541: goto err;
542: return(1);
543: }
544:
545: /* The macro is sane. Jump to the next word. */
546:
547: while (buf[i] && ' ' == buf[i])
548: i++;
1.18 schwarze 549:
1.27 schwarze 550: /*
551: * Trailing whitespace. Note that tabs are allowed to be passed
552: * into the parser as "text", so we only warn about spaces here.
553: */
1.18 schwarze 554:
555: if ('\0' == buf[i] && ' ' == buf[i - 1])
556: if ( ! man_pwarn(m, ln, i - 1, WTSPACE))
557: goto err;
1.1 kristaps 558:
1.21 schwarze 559: /*
560: * Remove prior ELINE macro, as it's being clobbering by a new
561: * macro. Note that NSCOPED macros do not close out ELINE
562: * macros---they don't print text---so we let those slip by.
1.24 schwarze 563: * NOTE: we don't allow roff blocks (NOCLOSE) to be embedded
564: * here because that would stipulate blocks as children of
565: * elements!
1.21 schwarze 566: */
567:
1.22 schwarze 568: if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.21 schwarze 569: m->flags & MAN_ELINE) {
570: assert(MAN_TEXT != m->last->type);
571:
572: /*
573: * This occurs in the following construction:
574: * .B
575: * .br
576: * .B
577: * .br
578: * I hate man macros.
579: * Flat-out disallow this madness.
580: */
581: if (MAN_NSCOPED & man_macros[m->last->tok].flags)
582: return(man_perr(m, ln, ppos, WLNSCOPE));
1.10 schwarze 583:
584: n = m->last;
1.21 schwarze 585:
586: assert(n);
1.10 schwarze 587: assert(NULL == n->child);
588: assert(0 == n->nchild);
1.21 schwarze 589:
1.10 schwarze 590: if ( ! man_nwarn(m, n, WLNSCOPE))
591: return(0);
592:
1.22 schwarze 593: man_node_delete(m, n);
1.10 schwarze 594: m->flags &= ~MAN_ELINE;
595: }
596:
1.24 schwarze 597: /*
598: * Save the fact that we're in the next-line for a block. In
599: * this way, embedded roff instructions can "remember" state
600: * when they exit.
601: */
602:
603: if (MAN_BLINE & m->flags)
604: m->flags |= MAN_BPLINE;
605:
606: /* Call to handler... */
1.1 kristaps 607:
1.22 schwarze 608: assert(man_macros[tok].fp);
609: if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1 kristaps 610: goto err;
611:
612: out:
1.21 schwarze 613: /*
614: * We weren't in a block-line scope when entering the
615: * above-parsed macro, so return.
616: */
617:
1.24 schwarze 618: if ( ! (MAN_BPLINE & m->flags)) {
1.21 schwarze 619: m->flags &= ~MAN_ILINE;
1.9 schwarze 620: return(1);
1.21 schwarze 621: }
1.24 schwarze 622: m->flags &= ~MAN_BPLINE;
1.21 schwarze 623:
624: /*
625: * If we're in a block scope, then allow this macro to slip by
626: * without closing scope around it.
627: */
628:
629: if (MAN_ILINE & m->flags) {
630: m->flags &= ~MAN_ILINE;
631: return(1);
632: }
1.9 schwarze 633:
634: /*
635: * If we've opened a new next-line element scope, then return
636: * now, as the next line will close out the block scope.
637: */
638:
639: if (MAN_ELINE & m->flags)
640: return(1);
641:
642: /* Close out the block scope opened in the prior line. */
1.1 kristaps 643:
1.9 schwarze 644: assert(MAN_BLINE & m->flags);
645: m->flags &= ~MAN_BLINE;
1.1 kristaps 646:
1.23 schwarze 647: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.9 schwarze 648: return(0);
649: return(man_body_alloc(m, ln, 0, m->last->tok));
1.1 kristaps 650:
651: err: /* Error out. */
652:
653: m->flags |= MAN_HALT;
654: return(0);
655: }
656:
657:
658: int
659: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
660: {
661: char buf[256];
662: va_list ap;
663:
664: if (NULL == man->cb.man_err)
665: return(0);
666:
667: va_start(ap, fmt);
668: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
669: va_end(ap);
670: return((*man->cb.man_err)(man->data, ln, pos, buf));
671: }
672:
673:
674: int
675: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
676: {
677: char buf[256];
678: va_list ap;
679:
680: if (NULL == man->cb.man_warn)
681: return(0);
682:
683: va_start(ap, fmt);
684: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
685: va_end(ap);
686: return((*man->cb.man_warn)(man->data, ln, pos, buf));
687: }
688:
689:
1.4 schwarze 690: int
1.7 schwarze 691: man_err(struct man *m, int line, int pos, int iserr, enum merr type)
1.4 schwarze 692: {
693: const char *p;
694:
1.7 schwarze 695: p = __man_merrnames[(int)type];
1.4 schwarze 696: assert(p);
697:
698: if (iserr)
699: return(man_verr(m, line, pos, p));
700:
701: return(man_vwarn(m, line, pos, p));
1.21 schwarze 702: }
703:
704:
1.22 schwarze 705: /*
706: * Unlink a node from its context. If "m" is provided, the last parse
707: * point will also be adjusted accordingly.
708: */
709: static void
1.21 schwarze 710: man_node_unlink(struct man *m, struct man_node *n)
711: {
712:
1.22 schwarze 713: /* Adjust siblings. */
714:
715: if (n->prev)
1.21 schwarze 716: n->prev->next = n->next;
1.22 schwarze 717: if (n->next)
718: n->next->prev = n->prev;
719:
720: /* Adjust parent. */
721:
722: if (n->parent) {
723: n->parent->nchild--;
724: if (n->parent->child == n)
725: n->parent->child = n->prev ? n->prev : n->next;
726: }
727:
728: /* Adjust parse point, if applicable. */
729:
730: if (m && m->last == n) {
731: /*XXX: this can occur when bailing from validation. */
732: /*assert(NULL == n->next);*/
733: if (n->prev) {
1.21 schwarze 734: m->last = n->prev;
735: m->next = MAN_NEXT_SIBLING;
1.22 schwarze 736: } else {
1.21 schwarze 737: m->last = n->parent;
738: m->next = MAN_NEXT_CHILD;
739: }
740: }
741:
1.22 schwarze 742: if (m && m->first == n)
743: m->first = NULL;
1.4 schwarze 744: }
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