Annotation of src/usr.bin/mandoc/man.c, Revision 1.31
1.31 ! schwarze 1: /* $Id: man.c,v 1.30 2010/05/16 00:54:03 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 */
1.23 schwarze 48: "document title should be uppercase", /* WTITLECASE */
1.26 schwarze 49: "deprecated comment style", /* WBADCOMMENT */
1.7 schwarze 50: };
51:
1.1 kristaps 52: const char *const __man_macronames[MAN_MAX] = {
1.3 schwarze 53: "br", "TH", "SH", "SS",
1.1 kristaps 54: "TP", "LP", "PP", "P",
55: "IP", "HP", "SM", "SB",
56: "BI", "IB", "BR", "RB",
57: "R", "B", "I", "IR",
1.9 schwarze 58: "RI", "na", "i", "sp",
1.10 schwarze 59: "nf", "fi", "r", "RE",
1.20 schwarze 60: "RS", "DT", "UC", "PD",
1.30 schwarze 61: "Sp", "Vb", "Ve",
1.1 kristaps 62: };
63:
64: const char * const *man_macronames = __man_macronames;
65:
66: static struct man_node *man_node_alloc(int, int,
1.22 schwarze 67: enum man_type, enum mant);
1.1 kristaps 68: static int man_node_append(struct man *,
69: struct man_node *);
1.22 schwarze 70: static void man_node_free(struct man_node *);
71: static void man_node_unlink(struct man *,
72: struct man_node *);
1.31 ! schwarze 73: static int man_ptext(struct man *, int, char *, int);
! 74: static int man_pmacro(struct man *, int, char *, int);
1.1 kristaps 75: static void man_free1(struct man *);
1.16 schwarze 76: static void man_alloc1(struct man *);
1.31 ! schwarze 77: static int macrowarn(struct man *, int, const char *, int);
1.1 kristaps 78:
79:
80: const struct man_node *
81: man_node(const struct man *m)
82: {
83:
84: return(MAN_HALT & m->flags ? NULL : m->first);
85: }
86:
87:
88: const struct man_meta *
89: man_meta(const struct man *m)
90: {
91:
92: return(MAN_HALT & m->flags ? NULL : &m->meta);
93: }
94:
95:
1.16 schwarze 96: void
1.1 kristaps 97: man_reset(struct man *man)
98: {
99:
100: man_free1(man);
1.16 schwarze 101: man_alloc1(man);
1.1 kristaps 102: }
103:
104:
105: void
106: man_free(struct man *man)
107: {
108:
109: man_free1(man);
110: free(man);
111: }
112:
113:
114: struct man *
115: man_alloc(void *data, int pflags, const struct man_cb *cb)
116: {
117: struct man *p;
118:
1.16 schwarze 119: p = mandoc_calloc(1, sizeof(struct man));
1.1 kristaps 120:
1.16 schwarze 121: if (cb)
122: memcpy(&p->cb, cb, sizeof(struct man_cb));
1.1 kristaps 123:
1.13 schwarze 124: man_hash_init();
1.1 kristaps 125: p->data = data;
126: p->pflags = pflags;
1.16 schwarze 127:
128: man_alloc1(p);
1.1 kristaps 129: return(p);
130: }
131:
132:
133: int
134: man_endparse(struct man *m)
135: {
136:
137: if (MAN_HALT & m->flags)
138: return(0);
139: else if (man_macroend(m))
140: return(1);
141: m->flags |= MAN_HALT;
142: return(0);
143: }
144:
145:
146: int
1.31 ! schwarze 147: man_parseln(struct man *m, int ln, char *buf, int offs)
1.1 kristaps 148: {
1.25 schwarze 149:
1.31 ! schwarze 150: if (MAN_HALT & m->flags)
! 151: return(0);
1.1 kristaps 152:
1.31 ! schwarze 153: return(('.' == buf[offs] || '\'' == buf[offs]) ?
! 154: man_pmacro(m, ln, buf, offs) :
! 155: man_ptext(m, ln, buf, offs));
1.1 kristaps 156: }
157:
158:
159: static void
160: man_free1(struct man *man)
161: {
162:
163: if (man->first)
1.22 schwarze 164: man_node_delete(man, man->first);
1.1 kristaps 165: if (man->meta.title)
166: free(man->meta.title);
167: if (man->meta.source)
168: free(man->meta.source);
169: if (man->meta.vol)
170: free(man->meta.vol);
1.29 schwarze 171: if (man->meta.msec)
172: free(man->meta.msec);
1.1 kristaps 173: }
174:
175:
1.16 schwarze 176: static void
1.1 kristaps 177: man_alloc1(struct man *m)
178: {
179:
1.16 schwarze 180: memset(&m->meta, 0, sizeof(struct man_meta));
1.1 kristaps 181: m->flags = 0;
1.16 schwarze 182: m->last = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 183: m->first = m->last;
184: m->last->type = MAN_ROOT;
1.22 schwarze 185: m->last->tok = MAN_MAX;
1.1 kristaps 186: m->next = MAN_NEXT_CHILD;
187: }
188:
189:
190: static int
191: man_node_append(struct man *man, struct man_node *p)
192: {
193:
194: assert(man->last);
195: assert(man->first);
196: assert(MAN_ROOT != p->type);
197:
198: switch (man->next) {
199: case (MAN_NEXT_SIBLING):
200: man->last->next = p;
201: p->prev = man->last;
202: p->parent = man->last->parent;
203: break;
204: case (MAN_NEXT_CHILD):
205: man->last->child = p;
206: p->parent = man->last;
207: break;
208: default:
209: abort();
210: /* NOTREACHED */
211: }
1.5 schwarze 212:
1.22 schwarze 213: assert(p->parent);
1.5 schwarze 214: p->parent->nchild++;
1.1 kristaps 215:
1.9 schwarze 216: if ( ! man_valid_pre(man, p))
217: return(0);
218:
219: switch (p->type) {
220: case (MAN_HEAD):
221: assert(MAN_BLOCK == p->parent->type);
222: p->parent->head = p;
223: break;
224: case (MAN_BODY):
225: assert(MAN_BLOCK == p->parent->type);
226: p->parent->body = p;
227: break;
228: default:
229: break;
230: }
231:
1.1 kristaps 232: man->last = p;
233:
234: switch (p->type) {
235: case (MAN_TEXT):
236: if ( ! man_valid_post(man))
237: return(0);
238: if ( ! man_action_post(man))
239: return(0);
240: break;
241: default:
242: break;
243: }
244:
245: return(1);
246: }
247:
248:
249: static struct man_node *
1.22 schwarze 250: man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
1.1 kristaps 251: {
252: struct man_node *p;
253:
1.16 schwarze 254: p = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 255: p->line = line;
256: p->pos = pos;
257: p->type = type;
258: p->tok = tok;
259: return(p);
260: }
261:
262:
263: int
1.22 schwarze 264: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1 kristaps 265: {
266: struct man_node *p;
267:
268: p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.10 schwarze 269: if ( ! man_node_append(m, p))
270: return(0);
271: m->next = MAN_NEXT_CHILD;
272: return(1);
1.1 kristaps 273: }
274:
275:
276: int
1.22 schwarze 277: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 278: {
279: struct man_node *p;
280:
281: p = man_node_alloc(line, pos, MAN_HEAD, tok);
282: if ( ! man_node_append(m, p))
283: return(0);
284: m->next = MAN_NEXT_CHILD;
285: return(1);
286: }
287:
288:
289: int
1.22 schwarze 290: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 291: {
292: struct man_node *p;
293:
294: p = man_node_alloc(line, pos, MAN_BODY, tok);
295: if ( ! man_node_append(m, p))
296: return(0);
297: m->next = MAN_NEXT_CHILD;
298: return(1);
299: }
300:
301:
302: int
1.22 schwarze 303: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.9 schwarze 304: {
305: struct man_node *p;
306:
307: p = man_node_alloc(line, pos, MAN_BLOCK, tok);
308: if ( ! man_node_append(m, p))
309: return(0);
310: m->next = MAN_NEXT_CHILD;
311: return(1);
312: }
313:
314:
1.27 schwarze 315: int
316: man_word_alloc(struct man *m, int line, int pos, const char *word)
1.1 kristaps 317: {
1.10 schwarze 318: struct man_node *n;
1.27 schwarze 319: size_t sv, len;
320:
321: len = strlen(word);
1.1 kristaps 322:
1.22 schwarze 323: n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
1.16 schwarze 324: n->string = mandoc_malloc(len + 1);
1.27 schwarze 325: sv = strlcpy(n->string, word, len + 1);
1.10 schwarze 326:
327: /* Prohibit truncation. */
328: assert(sv < len + 1);
329:
330: if ( ! man_node_append(m, n))
1.1 kristaps 331: return(0);
1.27 schwarze 332:
1.10 schwarze 333: m->next = MAN_NEXT_SIBLING;
334: return(1);
335: }
336:
337:
1.22 schwarze 338: /*
339: * Free all of the resources held by a node. This does NOT unlink a
340: * node from its context; for that, see man_node_unlink().
341: */
342: static void
1.1 kristaps 343: man_node_free(struct man_node *p)
344: {
345:
346: if (p->string)
347: free(p->string);
348: free(p);
349: }
350:
351:
352: void
1.22 schwarze 353: man_node_delete(struct man *m, struct man_node *p)
1.1 kristaps 354: {
355:
1.22 schwarze 356: while (p->child)
357: man_node_delete(m, p->child);
358:
359: man_node_unlink(m, p);
1.1 kristaps 360: man_node_free(p);
361: }
362:
363:
364: static int
1.31 ! schwarze 365: man_ptext(struct man *m, int line, char *buf, int offs)
1.1 kristaps 366: {
1.27 schwarze 367: int i;
1.26 schwarze 368:
369: /* Ignore bogus comments. */
370:
1.31 ! schwarze 371: if ('\\' == buf[offs] &&
! 372: '.' == buf[offs + 1] &&
! 373: '"' == buf[offs + 2])
! 374: return(man_pwarn(m, line, offs, WBADCOMMENT));
1.10 schwarze 375:
376: /* Literal free-form text whitespace is preserved. */
377:
378: if (MAN_LITERAL & m->flags) {
1.31 ! schwarze 379: if ( ! man_word_alloc(m, line, offs, buf + offs))
1.10 schwarze 380: return(0);
381: goto descope;
382: }
383:
1.27 schwarze 384: /* Pump blank lines directly into the backend. */
1.10 schwarze 385:
1.31 ! schwarze 386: for (i = offs; ' ' == buf[i]; i++)
1.10 schwarze 387: /* Skip leading whitespace. */ ;
1.18 schwarze 388:
389: if ('\0' == buf[i]) {
1.27 schwarze 390: /* Allocate a blank entry. */
1.31 ! schwarze 391: if ( ! man_word_alloc(m, line, offs, ""))
1.10 schwarze 392: return(0);
393: goto descope;
394: }
1.1 kristaps 395:
1.27 schwarze 396: /*
397: * Warn if the last un-escaped character is whitespace. Then
398: * strip away the remaining spaces (tabs stay!).
399: */
1.18 schwarze 400:
1.27 schwarze 401: i = (int)strlen(buf);
402: assert(i);
1.18 schwarze 403:
1.27 schwarze 404: if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
405: if (i > 1 && '\\' != buf[i - 2])
1.18 schwarze 406: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
407: return(0);
408:
1.27 schwarze 409: for (--i; i && ' ' == buf[i]; i--)
410: /* Spin back to non-space. */ ;
1.10 schwarze 411:
1.27 schwarze 412: /* Jump ahead of escaped whitespace. */
413: i += '\\' == buf[i] ? 2 : 1;
1.18 schwarze 414:
1.27 schwarze 415: buf[i] = '\0';
1.10 schwarze 416: }
1.9 schwarze 417:
1.31 ! schwarze 418: if ( ! man_word_alloc(m, line, offs, buf + offs))
1.1 kristaps 419: return(0);
1.28 schwarze 420:
421: /*
422: * End-of-sentence check. If the last character is an unescaped
423: * EOS character, then flag the node as being the end of a
424: * sentence. The front-end will know how to interpret this.
425: */
426:
427: assert(i);
428: if (mandoc_eos(buf, (size_t)i))
429: m->last->flags |= MAN_EOS;
1.10 schwarze 430:
431: descope:
1.1 kristaps 432: /*
1.9 schwarze 433: * Co-ordinate what happens with having a next-line scope open:
434: * first close out the element scope (if applicable), then close
435: * out the block scope (also if applicable).
1.1 kristaps 436: */
437:
1.9 schwarze 438: if (MAN_ELINE & m->flags) {
439: m->flags &= ~MAN_ELINE;
1.23 schwarze 440: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.9 schwarze 441: return(0);
442: }
443:
444: if ( ! (MAN_BLINE & m->flags))
1.1 kristaps 445: return(1);
1.9 schwarze 446: m->flags &= ~MAN_BLINE;
1.1 kristaps 447:
1.23 schwarze 448: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.1 kristaps 449: return(0);
1.31 ! schwarze 450: return(man_body_alloc(m, line, offs, m->last->tok));
1.1 kristaps 451: }
452:
453:
1.15 schwarze 454: static int
1.31 ! schwarze 455: macrowarn(struct man *m, int ln, const char *buf, int offs)
1.15 schwarze 456: {
457: if ( ! (MAN_IGN_MACRO & m->pflags))
1.31 ! schwarze 458: return(man_verr(m, ln, offs, "unknown macro: %s%s",
1.15 schwarze 459: buf, strlen(buf) > 3 ? "..." : ""));
1.31 ! schwarze 460: return(man_vwarn(m, ln, offs, "unknown macro: %s%s",
1.15 schwarze 461: buf, strlen(buf) > 3 ? "..." : ""));
462: }
463:
464:
1.1 kristaps 465: int
1.31 ! schwarze 466: man_pmacro(struct man *m, int ln, char *buf, int offs)
1.1 kristaps 467: {
1.24 schwarze 468: int i, j, ppos;
1.22 schwarze 469: enum mant tok;
1.10 schwarze 470: char mac[5];
471: struct man_node *n;
1.1 kristaps 472:
473: /* Comments and empties are quickly ignored. */
474:
1.31 ! schwarze 475: offs++;
! 476:
! 477: if ('\0' == buf[offs])
1.17 schwarze 478: return(1);
1.1 kristaps 479:
1.31 ! schwarze 480: i = offs;
1.1 kristaps 481:
1.23 schwarze 482: /*
483: * Skip whitespace between the control character and initial
484: * text. "Whitespace" is both spaces and tabs.
485: */
1.27 schwarze 486:
1.23 schwarze 487: if (' ' == buf[i] || '\t' == buf[i]) {
1.1 kristaps 488: i++;
1.23 schwarze 489: while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
1.1 kristaps 490: i++;
1.18 schwarze 491: if ('\0' == buf[i])
1.1 kristaps 492: goto out;
493: }
494:
495: ppos = i;
496:
497: /* Copy the first word into a nil-terminated buffer. */
498:
499: for (j = 0; j < 4; j++, i++) {
1.18 schwarze 500: if ('\0' == (mac[j] = buf[i]))
1.1 kristaps 501: break;
502: else if (' ' == buf[i])
503: break;
1.11 schwarze 504:
505: /* Check for invalid characters. */
506:
507: if (isgraph((u_char)buf[i]))
508: continue;
509: return(man_perr(m, ln, i, WNPRINT));
1.1 kristaps 510: }
511:
1.17 schwarze 512: mac[j] = '\0';
1.1 kristaps 513:
514: if (j == 4 || j < 1) {
515: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.9 schwarze 516: (void)man_perr(m, ln, ppos, WMACROFORM);
1.1 kristaps 517: goto err;
518: }
1.9 schwarze 519: if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
1.1 kristaps 520: goto err;
521: return(1);
522: }
523:
1.22 schwarze 524: if (MAN_MAX == (tok = man_hash_find(mac))) {
1.31 ! schwarze 525: if ( ! macrowarn(m, ln, mac, ppos))
1.1 kristaps 526: goto err;
527: return(1);
528: }
529:
530: /* The macro is sane. Jump to the next word. */
531:
532: while (buf[i] && ' ' == buf[i])
533: i++;
1.18 schwarze 534:
1.27 schwarze 535: /*
536: * Trailing whitespace. Note that tabs are allowed to be passed
537: * into the parser as "text", so we only warn about spaces here.
538: */
1.18 schwarze 539:
540: if ('\0' == buf[i] && ' ' == buf[i - 1])
541: if ( ! man_pwarn(m, ln, i - 1, WTSPACE))
542: goto err;
1.1 kristaps 543:
1.21 schwarze 544: /*
545: * Remove prior ELINE macro, as it's being clobbering by a new
546: * macro. Note that NSCOPED macros do not close out ELINE
547: * macros---they don't print text---so we let those slip by.
548: */
549:
1.22 schwarze 550: if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.21 schwarze 551: m->flags & MAN_ELINE) {
552: assert(MAN_TEXT != m->last->type);
553:
554: /*
555: * This occurs in the following construction:
556: * .B
557: * .br
558: * .B
559: * .br
560: * I hate man macros.
561: * Flat-out disallow this madness.
562: */
563: if (MAN_NSCOPED & man_macros[m->last->tok].flags)
564: return(man_perr(m, ln, ppos, WLNSCOPE));
1.10 schwarze 565:
566: n = m->last;
1.21 schwarze 567:
568: assert(n);
1.10 schwarze 569: assert(NULL == n->child);
570: assert(0 == n->nchild);
1.21 schwarze 571:
1.10 schwarze 572: if ( ! man_nwarn(m, n, WLNSCOPE))
573: return(0);
574:
1.22 schwarze 575: man_node_delete(m, n);
1.10 schwarze 576: m->flags &= ~MAN_ELINE;
577: }
578:
1.24 schwarze 579: /*
580: * Save the fact that we're in the next-line for a block. In
581: * this way, embedded roff instructions can "remember" state
582: * when they exit.
583: */
584:
585: if (MAN_BLINE & m->flags)
586: m->flags |= MAN_BPLINE;
587:
588: /* Call to handler... */
1.1 kristaps 589:
1.22 schwarze 590: assert(man_macros[tok].fp);
591: if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1 kristaps 592: goto err;
593:
594: out:
1.21 schwarze 595: /*
596: * We weren't in a block-line scope when entering the
597: * above-parsed macro, so return.
598: */
599:
1.24 schwarze 600: if ( ! (MAN_BPLINE & m->flags)) {
1.21 schwarze 601: m->flags &= ~MAN_ILINE;
1.9 schwarze 602: return(1);
1.21 schwarze 603: }
1.24 schwarze 604: m->flags &= ~MAN_BPLINE;
1.21 schwarze 605:
606: /*
607: * If we're in a block scope, then allow this macro to slip by
608: * without closing scope around it.
609: */
610:
611: if (MAN_ILINE & m->flags) {
612: m->flags &= ~MAN_ILINE;
613: return(1);
614: }
1.9 schwarze 615:
616: /*
617: * If we've opened a new next-line element scope, then return
618: * now, as the next line will close out the block scope.
619: */
620:
621: if (MAN_ELINE & m->flags)
622: return(1);
623:
624: /* Close out the block scope opened in the prior line. */
1.1 kristaps 625:
1.9 schwarze 626: assert(MAN_BLINE & m->flags);
627: m->flags &= ~MAN_BLINE;
1.1 kristaps 628:
1.23 schwarze 629: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.9 schwarze 630: return(0);
1.31 ! schwarze 631: return(man_body_alloc(m, ln, offs, m->last->tok));
1.1 kristaps 632:
633: err: /* Error out. */
634:
635: m->flags |= MAN_HALT;
636: return(0);
637: }
638:
639:
640: int
641: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
642: {
643: char buf[256];
644: va_list ap;
645:
646: if (NULL == man->cb.man_err)
647: return(0);
648:
649: va_start(ap, fmt);
650: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
651: va_end(ap);
652: return((*man->cb.man_err)(man->data, ln, pos, buf));
653: }
654:
655:
656: int
657: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
658: {
659: char buf[256];
660: va_list ap;
661:
662: if (NULL == man->cb.man_warn)
663: return(0);
664:
665: va_start(ap, fmt);
666: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
667: va_end(ap);
668: return((*man->cb.man_warn)(man->data, ln, pos, buf));
669: }
670:
671:
1.4 schwarze 672: int
1.7 schwarze 673: man_err(struct man *m, int line, int pos, int iserr, enum merr type)
1.4 schwarze 674: {
675: const char *p;
676:
1.7 schwarze 677: p = __man_merrnames[(int)type];
1.4 schwarze 678: assert(p);
679:
680: if (iserr)
681: return(man_verr(m, line, pos, p));
682:
683: return(man_vwarn(m, line, pos, p));
1.21 schwarze 684: }
685:
686:
1.22 schwarze 687: /*
688: * Unlink a node from its context. If "m" is provided, the last parse
689: * point will also be adjusted accordingly.
690: */
691: static void
1.21 schwarze 692: man_node_unlink(struct man *m, struct man_node *n)
693: {
694:
1.22 schwarze 695: /* Adjust siblings. */
696:
697: if (n->prev)
1.21 schwarze 698: n->prev->next = n->next;
1.22 schwarze 699: if (n->next)
700: n->next->prev = n->prev;
701:
702: /* Adjust parent. */
703:
704: if (n->parent) {
705: n->parent->nchild--;
706: if (n->parent->child == n)
707: n->parent->child = n->prev ? n->prev : n->next;
708: }
709:
710: /* Adjust parse point, if applicable. */
711:
712: if (m && m->last == n) {
713: /*XXX: this can occur when bailing from validation. */
714: /*assert(NULL == n->next);*/
715: if (n->prev) {
1.21 schwarze 716: m->last = n->prev;
717: m->next = MAN_NEXT_SIBLING;
1.22 schwarze 718: } else {
1.21 schwarze 719: m->last = n->parent;
720: m->next = MAN_NEXT_CHILD;
721: }
722: }
723:
1.22 schwarze 724: if (m && m->first == n)
725: m->first = NULL;
1.4 schwarze 726: }
![[BACK]](/icons/back.gif){kind=icon}
Return to man.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / mandoc