Annotation of mandoc/man.c, Revision 1.57
1.57 ! kristaps 1: /* $Id: man.c,v 1.56 2010/03/27 10:21:38 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 */
1.55 kristaps 54: "scope in roff instructions broken", /* WROFFSCOPE */
55: "document title should be uppercase", /* WTITLECASE */
1.27 kristaps 56: };
57:
1.1 kristaps 58: const char *const __man_macronames[MAN_MAX] = {
1.21 kristaps 59: "br", "TH", "SH", "SS",
1.1 kristaps 60: "TP", "LP", "PP", "P",
61: "IP", "HP", "SM", "SB",
62: "BI", "IB", "BR", "RB",
1.11 kristaps 63: "R", "B", "I", "IR",
1.29 kristaps 64: "RI", "na", "i", "sp",
1.30 kristaps 65: "nf", "fi", "r", "RE",
1.52 kristaps 66: "RS", "DT", "UC", "PD",
1.54 kristaps 67: "Sp", "Vb", "Ve", "de",
68: "dei", "am", "ami", "ig",
69: ".",
1.1 kristaps 70: };
71:
72: const char * const *man_macronames = __man_macronames;
73:
1.16 kristaps 74: static struct man_node *man_node_alloc(int, int,
1.53 kristaps 75: enum man_type, enum mant);
1.1 kristaps 76: static int man_node_append(struct man *,
77: struct man_node *);
1.54 kristaps 78: static void man_node_free(struct man_node *);
79: static void man_node_unlink(struct man *,
80: struct man_node *);
1.1 kristaps 81: static int man_ptext(struct man *, int, char *);
82: static int man_pmacro(struct man *, int, char *);
1.2 kristaps 83: static void man_free1(struct man *);
1.45 kristaps 84: static void man_alloc1(struct man *);
1.31 kristaps 85: static int pstring(struct man *, int, int,
86: const char *, size_t);
1.43 kristaps 87: static int macrowarn(struct man *, int, const char *);
1.1 kristaps 88:
89:
90: const struct man_node *
1.2 kristaps 91: man_node(const struct man *m)
1.1 kristaps 92: {
93:
1.2 kristaps 94: return(MAN_HALT & m->flags ? NULL : m->first);
1.1 kristaps 95: }
96:
97:
98: const struct man_meta *
1.2 kristaps 99: man_meta(const struct man *m)
1.1 kristaps 100: {
101:
1.2 kristaps 102: return(MAN_HALT & m->flags ? NULL : &m->meta);
1.1 kristaps 103: }
104:
105:
1.45 kristaps 106: void
1.1 kristaps 107: man_reset(struct man *man)
108: {
109:
1.2 kristaps 110: man_free1(man);
1.45 kristaps 111: man_alloc1(man);
1.1 kristaps 112: }
113:
114:
115: void
116: man_free(struct man *man)
117: {
118:
1.2 kristaps 119: man_free1(man);
1.1 kristaps 120: free(man);
121: }
122:
123:
124: struct man *
1.7 kristaps 125: man_alloc(void *data, int pflags, const struct man_cb *cb)
1.1 kristaps 126: {
127: struct man *p;
128:
1.45 kristaps 129: p = mandoc_calloc(1, sizeof(struct man));
1.2 kristaps 130:
1.45 kristaps 131: if (cb)
132: memcpy(&p->cb, cb, sizeof(struct man_cb));
1.1 kristaps 133:
1.40 kristaps 134: man_hash_init();
1.4 kristaps 135: p->data = data;
1.7 kristaps 136: p->pflags = pflags;
1.45 kristaps 137:
138: man_alloc1(p);
1.1 kristaps 139: return(p);
140: }
141:
142:
143: int
144: man_endparse(struct man *m)
145: {
146:
1.3 kristaps 147: if (MAN_HALT & m->flags)
148: return(0);
149: else if (man_macroend(m))
150: return(1);
151: m->flags |= MAN_HALT;
152: return(0);
1.1 kristaps 153: }
154:
155:
156: int
157: man_parseln(struct man *m, int ln, char *buf)
158: {
159:
1.55 kristaps 160: return('.' == *buf || '\'' == *buf ?
1.1 kristaps 161: man_pmacro(m, ln, buf) :
162: man_ptext(m, ln, buf));
163: }
164:
165:
1.2 kristaps 166: static void
167: man_free1(struct man *man)
168: {
169:
170: if (man->first)
1.54 kristaps 171: man_node_delete(man, man->first);
1.2 kristaps 172: if (man->meta.title)
173: free(man->meta.title);
1.6 kristaps 174: if (man->meta.source)
175: free(man->meta.source);
1.2 kristaps 176: if (man->meta.vol)
177: free(man->meta.vol);
178: }
179:
180:
1.45 kristaps 181: static void
1.2 kristaps 182: man_alloc1(struct man *m)
183: {
184:
1.44 kristaps 185: memset(&m->meta, 0, sizeof(struct man_meta));
1.2 kristaps 186: m->flags = 0;
1.45 kristaps 187: m->last = mandoc_calloc(1, sizeof(struct man_node));
1.2 kristaps 188: m->first = m->last;
189: m->last->type = MAN_ROOT;
1.54 kristaps 190: m->last->tok = MAN_MAX;
1.2 kristaps 191: m->next = MAN_NEXT_CHILD;
192: }
193:
194:
1.1 kristaps 195: static int
196: man_node_append(struct man *man, struct man_node *p)
197: {
198:
199: assert(man->last);
200: assert(man->first);
201: assert(MAN_ROOT != p->type);
202:
203: switch (man->next) {
204: case (MAN_NEXT_SIBLING):
205: man->last->next = p;
206: p->prev = man->last;
207: p->parent = man->last->parent;
208: break;
209: case (MAN_NEXT_CHILD):
210: man->last->child = p;
211: p->parent = man->last;
212: break;
213: default:
214: abort();
215: /* NOTREACHED */
216: }
1.22 kristaps 217:
1.54 kristaps 218: assert(p->parent);
1.22 kristaps 219: p->parent->nchild++;
1.1 kristaps 220:
1.29 kristaps 221: if ( ! man_valid_pre(man, p))
222: return(0);
223:
224: switch (p->type) {
225: case (MAN_HEAD):
226: assert(MAN_BLOCK == p->parent->type);
227: p->parent->head = p;
228: break;
229: case (MAN_BODY):
230: assert(MAN_BLOCK == p->parent->type);
231: p->parent->body = p;
232: break;
233: default:
234: break;
235: }
236:
1.2 kristaps 237: man->last = p;
238:
1.1 kristaps 239: switch (p->type) {
1.2 kristaps 240: case (MAN_TEXT):
241: if ( ! man_valid_post(man))
242: return(0);
243: if ( ! man_action_post(man))
244: return(0);
1.1 kristaps 245: break;
246: default:
247: break;
248: }
249:
250: return(1);
251: }
252:
253:
254: static struct man_node *
1.53 kristaps 255: man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
1.1 kristaps 256: {
257: struct man_node *p;
258:
1.45 kristaps 259: p = mandoc_calloc(1, sizeof(struct man_node));
1.1 kristaps 260: p->line = line;
261: p->pos = pos;
262: p->type = type;
1.16 kristaps 263: p->tok = tok;
1.1 kristaps 264: return(p);
265: }
266:
267:
268: int
1.53 kristaps 269: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1 kristaps 270: {
271: struct man_node *p;
272:
1.16 kristaps 273: p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.30 kristaps 274: if ( ! man_node_append(m, p))
275: return(0);
276: m->next = MAN_NEXT_CHILD;
277: return(1);
1.1 kristaps 278: }
279:
280:
281: int
1.53 kristaps 282: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 283: {
284: struct man_node *p;
285:
286: p = man_node_alloc(line, pos, MAN_HEAD, tok);
287: if ( ! man_node_append(m, p))
288: return(0);
289: m->next = MAN_NEXT_CHILD;
290: return(1);
291: }
292:
293:
294: int
1.53 kristaps 295: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 296: {
297: struct man_node *p;
298:
299: p = man_node_alloc(line, pos, MAN_BODY, 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
1.53 kristaps 308: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.29 kristaps 309: {
310: struct man_node *p;
311:
312: p = man_node_alloc(line, pos, MAN_BLOCK, tok);
313: if ( ! man_node_append(m, p))
314: return(0);
315: m->next = MAN_NEXT_CHILD;
316: return(1);
317: }
318:
319:
1.31 kristaps 320: static int
321: pstring(struct man *m, int line, int pos,
322: const char *p, size_t len)
1.1 kristaps 323: {
1.31 kristaps 324: struct man_node *n;
325: size_t sv;
1.1 kristaps 326:
1.53 kristaps 327: n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
1.45 kristaps 328: n->string = mandoc_malloc(len + 1);
1.31 kristaps 329: sv = strlcpy(n->string, p, len + 1);
330:
331: /* Prohibit truncation. */
332: assert(sv < len + 1);
333:
334: if ( ! man_node_append(m, n))
1.30 kristaps 335: return(0);
336: m->next = MAN_NEXT_SIBLING;
337: return(1);
1.1 kristaps 338: }
339:
340:
1.31 kristaps 341: int
342: man_word_alloc(struct man *m, int line, int pos, const char *word)
343: {
344:
345: return(pstring(m, line, pos, word, strlen(word)));
346: }
347:
348:
1.54 kristaps 349: /*
350: * Free all of the resources held by a node. This does NOT unlink a
351: * node from its context; for that, see man_node_unlink().
352: */
353: static void
1.1 kristaps 354: man_node_free(struct man_node *p)
355: {
356:
357: if (p->string)
358: free(p->string);
359: free(p);
360: }
361:
362:
363: void
1.54 kristaps 364: man_node_delete(struct man *m, struct man_node *p)
1.1 kristaps 365: {
366:
1.54 kristaps 367: while (p->child)
368: man_node_delete(m, p->child);
369:
370: man_node_unlink(m, p);
1.1 kristaps 371: man_node_free(p);
372: }
373:
374:
375: static int
376: man_ptext(struct man *m, int line, char *buf)
377: {
1.31 kristaps 378: int i, j;
1.49 kristaps 379: char sv;
1.31 kristaps 380:
1.35 kristaps 381: /* Literal free-form text whitespace is preserved. */
382:
383: if (MAN_LITERAL & m->flags) {
384: if ( ! man_word_alloc(m, line, 0, buf))
385: return(0);
386: goto descope;
387: }
388:
1.31 kristaps 389: /* First de-chunk and allocate words. */
390:
391: for (i = 0; ' ' == buf[i]; i++)
392: /* Skip leading whitespace. */ ;
1.48 kristaps 393:
1.49 kristaps 394: if ('\0' == buf[i]) {
395: /* Trailing whitespace? */
396: if (i && ' ' == buf[i - 1])
397: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
398: return(0);
1.31 kristaps 399: if ( ! pstring(m, line, 0, &buf[i], 0))
400: return(0);
401: goto descope;
402: }
403:
404: for (j = i; buf[i]; i++) {
405: if (' ' != buf[i])
406: continue;
407:
408: /* Escaped whitespace. */
409: if (i && ' ' == buf[i] && '\\' == buf[i - 1])
410: continue;
1.1 kristaps 411:
1.49 kristaps 412: sv = buf[i];
413: buf[i++] = '\0';
414:
1.31 kristaps 415: if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
416: return(0);
1.29 kristaps 417:
1.49 kristaps 418: /* Trailing whitespace? Check at overwritten byte. */
419:
420: if (' ' == sv && '\0' == buf[i])
421: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
422: return(0);
423:
1.31 kristaps 424: for ( ; ' ' == buf[i]; i++)
425: /* Skip trailing whitespace. */ ;
1.30 kristaps 426:
1.31 kristaps 427: j = i;
1.49 kristaps 428:
429: /* Trailing whitespace? */
430:
431: if (' ' == buf[i - 1] && '\0' == buf[i])
432: if ( ! man_pwarn(m, line, i - 1, WTSPACE))
433: return(0);
434:
435: if ('\0' == buf[i])
1.31 kristaps 436: break;
437: }
438:
439: if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.1 kristaps 440: return(0);
1.31 kristaps 441:
442: descope:
1.11 kristaps 443:
444: /*
1.29 kristaps 445: * Co-ordinate what happens with having a next-line scope open:
446: * first close out the element scope (if applicable), then close
447: * out the block scope (also if applicable).
1.11 kristaps 448: */
449:
1.29 kristaps 450: if (MAN_ELINE & m->flags) {
451: m->flags &= ~MAN_ELINE;
1.55 kristaps 452: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.29 kristaps 453: return(0);
454: }
455:
456: if ( ! (MAN_BLINE & m->flags))
1.11 kristaps 457: return(1);
1.29 kristaps 458: m->flags &= ~MAN_BLINE;
1.11 kristaps 459:
1.55 kristaps 460: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.11 kristaps 461: return(0);
1.29 kristaps 462: return(man_body_alloc(m, line, 0, m->last->tok));
1.1 kristaps 463: }
464:
465:
1.43 kristaps 466: static int
467: macrowarn(struct man *m, int ln, const char *buf)
468: {
469: if ( ! (MAN_IGN_MACRO & m->pflags))
470: return(man_verr(m, ln, 0,
471: "unknown macro: %s%s",
472: buf, strlen(buf) > 3 ? "..." : ""));
473: return(man_vwarn(m, ln, 0, "unknown macro: %s%s",
474: buf, strlen(buf) > 3 ? "..." : ""));
475: }
476:
477:
1.1 kristaps 478: int
479: man_pmacro(struct man *m, int ln, char *buf)
480: {
1.53 kristaps 481: int i, j, ppos, fl;
482: enum mant tok;
1.34 kristaps 483: char mac[5];
484: struct man_node *n;
1.1 kristaps 485:
486: /* Comments and empties are quickly ignored. */
487:
1.29 kristaps 488: fl = m->flags;
1.11 kristaps 489:
1.46 kristaps 490: if ('\0' == buf[1])
491: return(1);
1.1 kristaps 492:
1.9 kristaps 493: i = 1;
494:
1.56 kristaps 495: /*
496: * Skip whitespace between the control character and initial
497: * text. "Whitespace" is both spaces and tabs.
498: */
1.57 ! kristaps 499: if (' ' == buf[i] || '\t' == buf[i]) {
1.9 kristaps 500: i++;
1.56 kristaps 501: while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
1.1 kristaps 502: i++;
1.48 kristaps 503: if ('\0' == buf[i])
1.11 kristaps 504: goto out;
1.1 kristaps 505: }
506:
1.10 kristaps 507: ppos = i;
508:
1.1 kristaps 509: /* Copy the first word into a nil-terminated buffer. */
510:
1.10 kristaps 511: for (j = 0; j < 4; j++, i++) {
1.48 kristaps 512: if ('\0' == (mac[j] = buf[i]))
1.1 kristaps 513: break;
1.10 kristaps 514: else if (' ' == buf[i])
1.1 kristaps 515: break;
1.38 kristaps 516:
517: /* Check for invalid characters. */
518:
519: if (isgraph((u_char)buf[i]))
520: continue;
521: return(man_perr(m, ln, i, WNPRINT));
1.1 kristaps 522: }
523:
1.46 kristaps 524: mac[j] = '\0';
1.1 kristaps 525:
1.9 kristaps 526: if (j == 4 || j < 1) {
1.7 kristaps 527: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.29 kristaps 528: (void)man_perr(m, ln, ppos, WMACROFORM);
1.7 kristaps 529: goto err;
530: }
1.29 kristaps 531: if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
1.7 kristaps 532: goto err;
1.12 kristaps 533: return(1);
1.7 kristaps 534: }
1.1 kristaps 535:
1.53 kristaps 536: if (MAN_MAX == (tok = man_hash_find(mac))) {
1.43 kristaps 537: if ( ! macrowarn(m, ln, mac))
1.7 kristaps 538: goto err;
1.12 kristaps 539: return(1);
1.1 kristaps 540: }
541:
542: /* The macro is sane. Jump to the next word. */
543:
544: while (buf[i] && ' ' == buf[i])
545: i++;
546:
1.48 kristaps 547: /* Trailing whitespace? */
548:
549: if ('\0' == buf[i] && ' ' == buf[i - 1])
550: if ( ! man_pwarn(m, ln, i - 1, WTSPACE))
551: goto err;
552:
1.50 kristaps 553: /*
1.51 kristaps 554: * Remove prior ELINE macro, as it's being clobbering by a new
555: * macro. Note that NSCOPED macros do not close out ELINE
556: * macros---they don't print text---so we let those slip by.
1.50 kristaps 557: */
1.34 kristaps 558:
1.53 kristaps 559: if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.51 kristaps 560: m->flags & MAN_ELINE) {
561: assert(MAN_TEXT != m->last->type);
562:
563: /*
564: * This occurs in the following construction:
565: * .B
566: * .br
567: * .B
568: * .br
569: * I hate man macros.
570: * Flat-out disallow this madness.
571: */
572: if (MAN_NSCOPED & man_macros[m->last->tok].flags)
573: return(man_perr(m, ln, ppos, WLNSCOPE));
574:
1.34 kristaps 575: n = m->last;
1.51 kristaps 576:
577: assert(n);
1.34 kristaps 578: assert(NULL == n->child);
1.37 kristaps 579: assert(0 == n->nchild);
1.51 kristaps 580:
1.34 kristaps 581: if ( ! man_nwarn(m, n, WLNSCOPE))
582: return(0);
583:
1.54 kristaps 584: man_node_delete(m, n);
1.34 kristaps 585: m->flags &= ~MAN_ELINE;
586: }
587:
1.1 kristaps 588: /* Begin recursive parse sequence. */
589:
1.53 kristaps 590: assert(man_macros[tok].fp);
1.29 kristaps 591:
1.53 kristaps 592: if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1 kristaps 593: goto err;
594:
1.11 kristaps 595: out:
1.50 kristaps 596: /*
597: * We weren't in a block-line scope when entering the
598: * above-parsed macro, so return.
1.54 kristaps 599: *
600: * FIXME: this prohibits the nesting of blocks (e.g., `de' and
601: * family) within BLINE or ELINE systems. This is annoying.
1.50 kristaps 602: */
603:
604: if ( ! (MAN_BLINE & fl)) {
605: m->flags &= ~MAN_ILINE;
1.29 kristaps 606: return(1);
1.50 kristaps 607: }
608:
609: /*
610: * If we're in a block scope, then allow this macro to slip by
611: * without closing scope around it.
612: */
613:
614: if (MAN_ILINE & m->flags) {
615: m->flags &= ~MAN_ILINE;
616: return(1);
617: }
1.29 kristaps 618:
619: /*
620: * If we've opened a new next-line element scope, then return
621: * now, as the next line will close out the block scope.
622: */
623:
624: if (MAN_ELINE & m->flags)
625: return(1);
626:
627: /* Close out the block scope opened in the prior line. */
1.11 kristaps 628:
1.29 kristaps 629: assert(MAN_BLINE & m->flags);
630: m->flags &= ~MAN_BLINE;
1.11 kristaps 631:
1.55 kristaps 632: if ( ! man_unscope(m, m->last->parent, WERRMAX))
1.29 kristaps 633: return(0);
634: return(man_body_alloc(m, ln, 0, m->last->tok));
1.1 kristaps 635:
636: err: /* Error out. */
637:
1.2 kristaps 638: m->flags |= MAN_HALT;
1.1 kristaps 639: return(0);
640: }
1.3 kristaps 641:
1.4 kristaps 642:
643: int
644: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
645: {
646: char buf[256];
647: va_list ap;
648:
649: if (NULL == man->cb.man_err)
650: return(0);
651:
652: va_start(ap, fmt);
653: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
654: va_end(ap);
655: return((*man->cb.man_err)(man->data, ln, pos, buf));
656: }
657:
658:
659: int
660: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
661: {
662: char buf[256];
663: va_list ap;
664:
665: if (NULL == man->cb.man_warn)
666: return(0);
667:
668: va_start(ap, fmt);
669: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
670: va_end(ap);
671: return((*man->cb.man_warn)(man->data, ln, pos, buf));
672: }
673:
674:
1.23 kristaps 675: int
1.27 kristaps 676: man_err(struct man *m, int line, int pos, int iserr, enum merr type)
1.23 kristaps 677: {
678: const char *p;
679:
1.27 kristaps 680: p = __man_merrnames[(int)type];
1.23 kristaps 681: assert(p);
682:
683: if (iserr)
684: return(man_verr(m, line, pos, p));
685:
686: return(man_vwarn(m, line, pos, p));
1.51 kristaps 687: }
688:
689:
1.54 kristaps 690: /*
691: * Unlink a node from its context. If "m" is provided, the last parse
692: * point will also be adjusted accordingly.
693: */
694: static void
1.51 kristaps 695: man_node_unlink(struct man *m, struct man_node *n)
696: {
697:
1.54 kristaps 698: /* Adjust siblings. */
699:
700: if (n->prev)
1.51 kristaps 701: n->prev->next = n->next;
1.54 kristaps 702: if (n->next)
703: n->next->prev = n->prev;
704:
705: /* Adjust parent. */
706:
707: if (n->parent) {
708: n->parent->nchild--;
709: if (n->parent->child == n)
710: n->parent->child = n->prev ? n->prev : n->next;
711: }
712:
713: /* Adjust parse point, if applicable. */
714:
715: if (m && m->last == n) {
716: /*XXX: this can occur when bailing from validation. */
717: /*assert(NULL == n->next);*/
718: if (n->prev) {
1.51 kristaps 719: m->last = n->prev;
720: m->next = MAN_NEXT_SIBLING;
1.54 kristaps 721: } else {
1.51 kristaps 722: m->last = n->parent;
723: m->next = MAN_NEXT_CHILD;
724: }
725: }
726:
1.54 kristaps 727: if (m && m->first == n)
728: m->first = NULL;
1.23 kristaps 729: }
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