Annotation of src/usr.bin/mandoc/man.c, Revision 1.28
1.28 ! schwarze 1: /* $Id: man.c,v 1.27 2010/05/14 01:54:37 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 manual section", /* WMSEC */
32: "invalid date format", /* WDATE */
33: "scope of prior line violated", /* WLNSCOPE */
1.21 schwarze 34: "over-zealous prior line scope violation", /* WLNSCOPE2 */
1.7 schwarze 35: "trailing whitespace", /* WTSPACE */
36: "unterminated quoted parameter", /* WTQUOTE */
37: "document has no body", /* WNODATA */
38: "document has no title/section", /* WNOTITLE */
39: "invalid escape sequence", /* WESCAPE */
1.8 schwarze 40: "invalid number format", /* WNUMFMT */
1.9 schwarze 41: "expected block head arguments", /* WHEADARGS */
42: "expected block body arguments", /* WBODYARGS */
43: "expected empty block head", /* WNHEADARGS */
44: "ill-formed macro", /* WMACROFORM */
1.10 schwarze 45: "scope open on exit", /* WEXITSCOPE */
46: "no scope context", /* WNOSCOPE */
47: "literal context already open", /* WOLITERAL */
1.22 schwarze 48: "no literal context open", /* WNLITERAL */
49: "invalid nesting of roff declarations", /* WROFFNEST */
1.23 schwarze 50: "scope in roff instructions broken", /* WROFFSCOPE */
51: "document title should be uppercase", /* WTITLECASE */
1.26 schwarze 52: "deprecated comment style", /* WBADCOMMENT */
1.7 schwarze 53: };
54:
1.1 kristaps 55: const char *const __man_macronames[MAN_MAX] = {
1.3 schwarze 56: "br", "TH", "SH", "SS",
1.1 kristaps 57: "TP", "LP", "PP", "P",
58: "IP", "HP", "SM", "SB",
59: "BI", "IB", "BR", "RB",
60: "R", "B", "I", "IR",
1.9 schwarze 61: "RI", "na", "i", "sp",
1.10 schwarze 62: "nf", "fi", "r", "RE",
1.20 schwarze 63: "RS", "DT", "UC", "PD",
1.22 schwarze 64: "Sp", "Vb", "Ve", "de",
65: "dei", "am", "ami", "ig",
1.25 schwarze 66: ".", "if", "ie", "el",
1.1 kristaps 67: };
68:
69: const char * const *man_macronames = __man_macronames;
70:
71: static struct man_node *man_node_alloc(int, int,
1.22 schwarze 72: enum man_type, enum mant);
1.1 kristaps 73: static int man_node_append(struct man *,
74: struct man_node *);
1.22 schwarze 75: static void man_node_free(struct man_node *);
76: static void man_node_unlink(struct man *,
77: struct man_node *);
1.1 kristaps 78: static int man_ptext(struct man *, int, char *);
79: static int man_pmacro(struct man *, int, char *);
80: static void man_free1(struct man *);
1.16 schwarze 81: static void man_alloc1(struct man *);
1.15 schwarze 82: static int macrowarn(struct man *, int, const char *);
1.1 kristaps 83:
84:
85: const struct man_node *
86: man_node(const struct man *m)
87: {
88:
89: return(MAN_HALT & m->flags ? NULL : m->first);
90: }
91:
92:
93: const struct man_meta *
94: man_meta(const struct man *m)
95: {
96:
97: return(MAN_HALT & m->flags ? NULL : &m->meta);
98: }
99:
100:
1.16 schwarze 101: void
1.1 kristaps 102: man_reset(struct man *man)
103: {
104:
105: man_free1(man);
1.16 schwarze 106: man_alloc1(man);
1.1 kristaps 107: }
108:
109:
110: void
111: man_free(struct man *man)
112: {
113:
114: man_free1(man);
115: free(man);
116: }
117:
118:
119: struct man *
120: man_alloc(void *data, int pflags, const struct man_cb *cb)
121: {
122: struct man *p;
123:
1.16 schwarze 124: p = mandoc_calloc(1, sizeof(struct man));
1.1 kristaps 125:
1.16 schwarze 126: if (cb)
127: memcpy(&p->cb, cb, sizeof(struct man_cb));
1.1 kristaps 128:
1.13 schwarze 129: man_hash_init();
1.1 kristaps 130: p->data = data;
131: p->pflags = pflags;
1.16 schwarze 132:
133: man_alloc1(p);
1.1 kristaps 134: return(p);
135: }
136:
137:
138: int
139: man_endparse(struct man *m)
140: {
141:
142: if (MAN_HALT & m->flags)
143: return(0);
144: else if (man_macroend(m))
145: return(1);
146: m->flags |= MAN_HALT;
147: return(0);
148: }
149:
150:
151: int
152: man_parseln(struct man *m, int ln, char *buf)
153: {
1.25 schwarze 154: char *p;
155: size_t len;
156: int brace_close = 0;
157:
158: if ((len = strlen(buf)) > 1) {
159: p = buf + (len - 2);
160: if (p[0] == '\\' && p[1] == '}') {
161: brace_close = 1;
162: *p = '\0';
163: }
164: }
165:
166: if ('.' == *buf || '\'' == *buf) {
167: if ( ! man_pmacro(m, ln, buf))
168: return(0);
169: } else {
170: if ( ! man_ptext(m, ln, buf))
171: return(0);
172: }
1.1 kristaps 173:
1.25 schwarze 174: return(brace_close ? man_brace_close(m, ln, len-2) : 1);
1.1 kristaps 175: }
176:
177:
178: static void
179: man_free1(struct man *man)
180: {
181:
182: if (man->first)
1.22 schwarze 183: man_node_delete(man, man->first);
1.1 kristaps 184: if (man->meta.title)
185: free(man->meta.title);
186: if (man->meta.source)
187: free(man->meta.source);
188: if (man->meta.vol)
189: free(man->meta.vol);
190: }
191:
192:
1.16 schwarze 193: static void
1.1 kristaps 194: man_alloc1(struct man *m)
195: {
196:
1.16 schwarze 197: memset(&m->meta, 0, sizeof(struct man_meta));
1.1 kristaps 198: m->flags = 0;
1.16 schwarze 199: m->last = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 200: m->first = m->last;
201: m->last->type = MAN_ROOT;
1.22 schwarze 202: m->last->tok = MAN_MAX;
1.1 kristaps 203: m->next = MAN_NEXT_CHILD;
204: }
205:
206:
207: static int
208: man_node_append(struct man *man, struct man_node *p)
209: {
210:
211: assert(man->last);
212: assert(man->first);
213: assert(MAN_ROOT != p->type);
214:
215: switch (man->next) {
216: case (MAN_NEXT_SIBLING):
217: man->last->next = p;
218: p->prev = man->last;
219: p->parent = man->last->parent;
220: break;
221: case (MAN_NEXT_CHILD):
222: man->last->child = p;
223: p->parent = man->last;
224: break;
225: default:
226: abort();
227: /* NOTREACHED */
228: }
1.5 schwarze 229:
1.22 schwarze 230: assert(p->parent);
1.5 schwarze 231: p->parent->nchild++;
1.1 kristaps 232:
1.9 schwarze 233: if ( ! man_valid_pre(man, p))
234: return(0);
235:
236: switch (p->type) {
237: case (MAN_HEAD):
238: assert(MAN_BLOCK == p->parent->type);
239: p->parent->head = p;
240: break;
241: case (MAN_BODY):
242: assert(MAN_BLOCK == p->parent->type);
243: p->parent->body = p;
244: break;
245: default:
246: break;
247: }
248:
1.1 kristaps 249: man->last = p;
250:
251: switch (p->type) {
252: case (MAN_TEXT):
253: if ( ! man_valid_post(man))
254: return(0);
255: if ( ! man_action_post(man))
256: return(0);
257: break;
258: default:
259: break;
260: }
261:
262: return(1);
263: }
264:
265:
266: static struct man_node *
1.22 schwarze 267: man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
1.1 kristaps 268: {
269: struct man_node *p;
270:
1.16 schwarze 271: p = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 272: p->line = line;
273: p->pos = pos;
274: p->type = type;
275: p->tok = tok;
276: return(p);
277: }
278:
279:
280: int
1.22 schwarze 281: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1 kristaps 282: {
283: struct man_node *p;
284:
285: p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.10 schwarze 286: if ( ! man_node_append(m, p))
287: return(0);
288: m->next = MAN_NEXT_CHILD;
289: return(1);
1.1 kristaps 290: }
291:
292:
293: int
1.22 schwarze 294: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 295: {
296: struct man_node *p;
297:
298: p = man_node_alloc(line, pos, MAN_HEAD, 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
1.22 schwarze 307: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 308: {
309: struct man_node *p;
310:
311: p = man_node_alloc(line, pos, MAN_BODY, tok);
312: if ( ! man_node_append(m, p))
313: return(0);
314: m->next = MAN_NEXT_CHILD;
315: return(1);
316: }
317:
318:
319: int
1.22 schwarze 320: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 321: {
322: struct man_node *p;
323:
324: p = man_node_alloc(line, pos, MAN_BLOCK, tok);
325: if ( ! man_node_append(m, p))
326: return(0);
327: m->next = MAN_NEXT_CHILD;
328: return(1);
329: }
330:
331:
1.27 schwarze 332: int
333: man_word_alloc(struct man *m, int line, int pos, const char *word)
1.1 kristaps 334: {
1.10 schwarze 335: struct man_node *n;
1.27 schwarze 336: size_t sv, len;
337:
338: len = strlen(word);
1.1 kristaps 339:
1.22 schwarze 340: n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
1.16 schwarze 341: n->string = mandoc_malloc(len + 1);
1.27 schwarze 342: sv = strlcpy(n->string, word, len + 1);
1.10 schwarze 343:
344: /* Prohibit truncation. */
345: assert(sv < len + 1);
346:
347: if ( ! man_node_append(m, n))
1.1 kristaps 348: return(0);
1.27 schwarze 349:
1.10 schwarze 350: m->next = MAN_NEXT_SIBLING;
351: return(1);
352: }
353:
354:
1.22 schwarze 355: /*
356: * Free all of the resources held by a node. This does NOT unlink a
357: * node from its context; for that, see man_node_unlink().
358: */
359: static void
1.1 kristaps 360: man_node_free(struct man_node *p)
361: {
362:
363: if (p->string)
364: free(p->string);
365: free(p);
366: }
367:
368:
369: void
1.22 schwarze 370: man_node_delete(struct man *m, struct man_node *p)
1.1 kristaps 371: {
372:
1.22 schwarze 373: while (p->child)
374: man_node_delete(m, p->child);
375:
376: man_node_unlink(m, p);
1.1 kristaps 377: man_node_free(p);
378: }
379:
380:
381: static int
382: man_ptext(struct man *m, int line, char *buf)
383: {
1.27 schwarze 384: int i;
1.26 schwarze 385:
386: /* Ignore bogus comments. */
387:
388: if ('\\' == buf[0] && '.' == buf[1] && '\"' == buf[2])
389: return(man_pwarn(m, line, 0, WBADCOMMENT));
1.10 schwarze 390:
391: /* Literal free-form text whitespace is preserved. */
392:
393: if (MAN_LITERAL & m->flags) {
394: if ( ! man_word_alloc(m, line, 0, buf))
395: return(0);
396: goto descope;
397: }
398:
1.27 schwarze 399: /* Pump blank lines directly into the backend. */
1.10 schwarze 400:
401: for (i = 0; ' ' == buf[i]; i++)
402: /* Skip leading whitespace. */ ;
1.18 schwarze 403:
404: if ('\0' == buf[i]) {
1.27 schwarze 405: /* Allocate a blank entry. */
406: if ( ! man_word_alloc(m, line, 0, ""))
1.10 schwarze 407: return(0);
408: goto descope;
409: }
1.1 kristaps 410:
1.27 schwarze 411: /*
412: * Warn if the last un-escaped character is whitespace. Then
413: * strip away the remaining spaces (tabs stay!).
414: */
1.18 schwarze 415:
1.27 schwarze 416: i = (int)strlen(buf);
417: assert(i);
1.18 schwarze 418:
1.27 schwarze 419: if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
420: if (i > 1 && '\\' != buf[i - 2])
1.18 schwarze 421: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
422: return(0);
423:
1.27 schwarze 424: for (--i; i && ' ' == buf[i]; i--)
425: /* Spin back to non-space. */ ;
1.10 schwarze 426:
1.27 schwarze 427: /* Jump ahead of escaped whitespace. */
428: i += '\\' == buf[i] ? 2 : 1;
1.18 schwarze 429:
1.27 schwarze 430: buf[i] = '\0';
1.10 schwarze 431: }
1.9 schwarze 432:
1.27 schwarze 433: if ( ! man_word_alloc(m, line, 0, buf))
1.1 kristaps 434: return(0);
1.28 ! schwarze 435:
! 436: /*
! 437: * End-of-sentence check. If the last character is an unescaped
! 438: * EOS character, then flag the node as being the end of a
! 439: * sentence. The front-end will know how to interpret this.
! 440: */
! 441:
! 442: assert(i);
! 443:
! 444: if (mandoc_eos(buf, (size_t)i))
! 445: m->last->flags |= MAN_EOS;
1.10 schwarze 446:
447: descope:
1.1 kristaps 448: /*
1.9 schwarze 449: * Co-ordinate what happens with having a next-line scope open:
450: * first close out the element scope (if applicable), then close
451: * out the block scope (also if applicable).
1.1 kristaps 452: */
453:
1.9 schwarze 454: if (MAN_ELINE & m->flags) {
455: m->flags &= ~MAN_ELINE;
1.23 schwarze 456: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.9 schwarze 457: return(0);
458: }
459:
460: if ( ! (MAN_BLINE & m->flags))
1.1 kristaps 461: return(1);
1.9 schwarze 462: m->flags &= ~MAN_BLINE;
1.1 kristaps 463:
1.23 schwarze 464: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.1 kristaps 465: return(0);
1.9 schwarze 466: return(man_body_alloc(m, line, 0, m->last->tok));
1.1 kristaps 467: }
468:
469:
1.15 schwarze 470: static int
471: macrowarn(struct man *m, int ln, const char *buf)
472: {
473: if ( ! (MAN_IGN_MACRO & m->pflags))
1.27 schwarze 474: return(man_verr(m, ln, 0, "unknown macro: %s%s",
1.15 schwarze 475: buf, strlen(buf) > 3 ? "..." : ""));
476: return(man_vwarn(m, ln, 0, "unknown macro: %s%s",
477: buf, strlen(buf) > 3 ? "..." : ""));
478: }
479:
480:
1.1 kristaps 481: int
482: man_pmacro(struct man *m, int ln, char *buf)
483: {
1.24 schwarze 484: int i, j, ppos;
1.22 schwarze 485: enum mant tok;
1.10 schwarze 486: char mac[5];
487: struct man_node *n;
1.1 kristaps 488:
489: /* Comments and empties are quickly ignored. */
490:
1.17 schwarze 491: if ('\0' == buf[1])
492: return(1);
1.1 kristaps 493:
494: i = 1;
495:
1.23 schwarze 496: /*
497: * Skip whitespace between the control character and initial
498: * text. "Whitespace" is both spaces and tabs.
499: */
1.27 schwarze 500:
1.23 schwarze 501: if (' ' == buf[i] || '\t' == buf[i]) {
1.1 kristaps 502: i++;
1.23 schwarze 503: while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
1.1 kristaps 504: i++;
1.18 schwarze 505: if ('\0' == buf[i])
1.1 kristaps 506: goto out;
507: }
508:
509: ppos = i;
510:
511: /* Copy the first word into a nil-terminated buffer. */
512:
513: for (j = 0; j < 4; j++, i++) {
1.18 schwarze 514: if ('\0' == (mac[j] = buf[i]))
1.1 kristaps 515: break;
516: else if (' ' == buf[i])
517: break;
1.11 schwarze 518:
519: /* Check for invalid characters. */
520:
521: if (isgraph((u_char)buf[i]))
522: continue;
523: return(man_perr(m, ln, i, WNPRINT));
1.1 kristaps 524: }
525:
1.17 schwarze 526: mac[j] = '\0';
1.1 kristaps 527:
528: if (j == 4 || j < 1) {
529: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.9 schwarze 530: (void)man_perr(m, ln, ppos, WMACROFORM);
1.1 kristaps 531: goto err;
532: }
1.9 schwarze 533: if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
1.1 kristaps 534: goto err;
535: return(1);
536: }
537:
1.22 schwarze 538: if (MAN_MAX == (tok = man_hash_find(mac))) {
1.15 schwarze 539: if ( ! macrowarn(m, ln, mac))
1.1 kristaps 540: goto err;
541: return(1);
542: }
543:
544: /* The macro is sane. Jump to the next word. */
545:
546: while (buf[i] && ' ' == buf[i])
547: i++;
1.18 schwarze 548:
1.27 schwarze 549: /*
550: * Trailing whitespace. Note that tabs are allowed to be passed
551: * into the parser as "text", so we only warn about spaces here.
552: */
1.18 schwarze 553:
554: if ('\0' == buf[i] && ' ' == buf[i - 1])
555: if ( ! man_pwarn(m, ln, i - 1, WTSPACE))
556: goto err;
1.1 kristaps 557:
1.21 schwarze 558: /*
559: * Remove prior ELINE macro, as it's being clobbering by a new
560: * macro. Note that NSCOPED macros do not close out ELINE
561: * macros---they don't print text---so we let those slip by.
1.24 schwarze 562: * NOTE: we don't allow roff blocks (NOCLOSE) to be embedded
563: * here because that would stipulate blocks as children of
564: * elements!
1.21 schwarze 565: */
566:
1.22 schwarze 567: if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.21 schwarze 568: m->flags & MAN_ELINE) {
569: assert(MAN_TEXT != m->last->type);
570:
571: /*
572: * This occurs in the following construction:
573: * .B
574: * .br
575: * .B
576: * .br
577: * I hate man macros.
578: * Flat-out disallow this madness.
579: */
580: if (MAN_NSCOPED & man_macros[m->last->tok].flags)
581: return(man_perr(m, ln, ppos, WLNSCOPE));
1.10 schwarze 582:
583: n = m->last;
1.21 schwarze 584:
585: assert(n);
1.10 schwarze 586: assert(NULL == n->child);
587: assert(0 == n->nchild);
1.21 schwarze 588:
1.10 schwarze 589: if ( ! man_nwarn(m, n, WLNSCOPE))
590: return(0);
591:
1.22 schwarze 592: man_node_delete(m, n);
1.10 schwarze 593: m->flags &= ~MAN_ELINE;
594: }
595:
1.24 schwarze 596: /*
597: * Save the fact that we're in the next-line for a block. In
598: * this way, embedded roff instructions can "remember" state
599: * when they exit.
600: */
601:
602: if (MAN_BLINE & m->flags)
603: m->flags |= MAN_BPLINE;
604:
605: /* Call to handler... */
1.1 kristaps 606:
1.22 schwarze 607: assert(man_macros[tok].fp);
608: if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1 kristaps 609: goto err;
610:
611: out:
1.21 schwarze 612: /*
613: * We weren't in a block-line scope when entering the
614: * above-parsed macro, so return.
615: */
616:
1.24 schwarze 617: if ( ! (MAN_BPLINE & m->flags)) {
1.21 schwarze 618: m->flags &= ~MAN_ILINE;
1.9 schwarze 619: return(1);
1.21 schwarze 620: }
1.24 schwarze 621: m->flags &= ~MAN_BPLINE;
1.21 schwarze 622:
623: /*
624: * If we're in a block scope, then allow this macro to slip by
625: * without closing scope around it.
626: */
627:
628: if (MAN_ILINE & m->flags) {
629: m->flags &= ~MAN_ILINE;
630: return(1);
631: }
1.9 schwarze 632:
633: /*
634: * If we've opened a new next-line element scope, then return
635: * now, as the next line will close out the block scope.
636: */
637:
638: if (MAN_ELINE & m->flags)
639: return(1);
640:
641: /* Close out the block scope opened in the prior line. */
1.1 kristaps 642:
1.9 schwarze 643: assert(MAN_BLINE & m->flags);
644: m->flags &= ~MAN_BLINE;
1.1 kristaps 645:
1.23 schwarze 646: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.9 schwarze 647: return(0);
648: return(man_body_alloc(m, ln, 0, m->last->tok));
1.1 kristaps 649:
650: err: /* Error out. */
651:
652: m->flags |= MAN_HALT;
653: return(0);
654: }
655:
656:
657: int
658: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
659: {
660: char buf[256];
661: va_list ap;
662:
663: if (NULL == man->cb.man_err)
664: return(0);
665:
666: va_start(ap, fmt);
667: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
668: va_end(ap);
669: return((*man->cb.man_err)(man->data, ln, pos, buf));
670: }
671:
672:
673: int
674: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
675: {
676: char buf[256];
677: va_list ap;
678:
679: if (NULL == man->cb.man_warn)
680: return(0);
681:
682: va_start(ap, fmt);
683: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
684: va_end(ap);
685: return((*man->cb.man_warn)(man->data, ln, pos, buf));
686: }
687:
688:
1.4 schwarze 689: int
1.7 schwarze 690: man_err(struct man *m, int line, int pos, int iserr, enum merr type)
1.4 schwarze 691: {
692: const char *p;
693:
1.7 schwarze 694: p = __man_merrnames[(int)type];
1.4 schwarze 695: assert(p);
696:
697: if (iserr)
698: return(man_verr(m, line, pos, p));
699:
700: return(man_vwarn(m, line, pos, p));
1.21 schwarze 701: }
702:
703:
1.22 schwarze 704: /*
705: * Unlink a node from its context. If "m" is provided, the last parse
706: * point will also be adjusted accordingly.
707: */
708: static void
1.21 schwarze 709: man_node_unlink(struct man *m, struct man_node *n)
710: {
711:
1.22 schwarze 712: /* Adjust siblings. */
713:
714: if (n->prev)
1.21 schwarze 715: n->prev->next = n->next;
1.22 schwarze 716: if (n->next)
717: n->next->prev = n->prev;
718:
719: /* Adjust parent. */
720:
721: if (n->parent) {
722: n->parent->nchild--;
723: if (n->parent->child == n)
724: n->parent->child = n->prev ? n->prev : n->next;
725: }
726:
727: /* Adjust parse point, if applicable. */
728:
729: if (m && m->last == n) {
730: /*XXX: this can occur when bailing from validation. */
731: /*assert(NULL == n->next);*/
732: if (n->prev) {
1.21 schwarze 733: m->last = n->prev;
734: m->next = MAN_NEXT_SIBLING;
1.22 schwarze 735: } else {
1.21 schwarze 736: m->last = n->parent;
737: m->next = MAN_NEXT_CHILD;
738: }
739: }
740:
1.22 schwarze 741: if (m && m->first == n)
742: m->first = NULL;
1.4 schwarze 743: }
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