Annotation of mandoc/man.c, Revision 1.36
1.36 ! kristaps 1: /* $Id: man.c,v 1.35 2009/08/21 12:32:38 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: */
17: #include <assert.h>
18: #include <ctype.h>
19: #include <stdarg.h>
20: #include <stdlib.h>
21: #include <stdio.h>
22: #include <string.h>
23:
24: #include "libman.h"
25:
1.27 kristaps 26: const char *const __man_merrnames[WERRMAX] = {
27: "invalid character", /* WNPRINT */
28: "system: malloc error", /* WNMEM */
29: "invalid manual section", /* WMSEC */
30: "invalid date format", /* WDATE */
31: "scope of prior line violated", /* WLNSCOPE */
32: "trailing whitespace", /* WTSPACE */
33: "unterminated quoted parameter", /* WTQUOTE */
34: "document has no body", /* WNODATA */
35: "document has no title/section", /* WNOTITLE */
36: "invalid escape sequence", /* WESCAPE */
1.28 kristaps 37: "invalid number format", /* WNUMFMT */
1.29 kristaps 38: "expected block head arguments", /* WHEADARGS */
39: "expected block body arguments", /* WBODYARGS */
40: "expected empty block head", /* WNHEADARGS */
41: "unknown macro", /* WMACRO */
42: "ill-formed macro", /* WMACROFORM */
1.30 kristaps 43: "scope open on exit", /* WEXITSCOPE */
1.35 kristaps 44: "no scope context", /* WNOSCOPE */
45: "literal context already open", /* WOLITERAL */
46: "no literal context open" /* WNLITERAL */
1.27 kristaps 47: };
48:
1.1 kristaps 49: const char *const __man_macronames[MAN_MAX] = {
1.21 kristaps 50: "br", "TH", "SH", "SS",
1.1 kristaps 51: "TP", "LP", "PP", "P",
52: "IP", "HP", "SM", "SB",
53: "BI", "IB", "BR", "RB",
1.11 kristaps 54: "R", "B", "I", "IR",
1.29 kristaps 55: "RI", "na", "i", "sp",
1.30 kristaps 56: "nf", "fi", "r", "RE",
1.33 kristaps 57: "RS", "DT"
1.1 kristaps 58: };
59:
60: const char * const *man_macronames = __man_macronames;
61:
1.16 kristaps 62: static struct man_node *man_node_alloc(int, int,
63: enum man_type, int);
1.1 kristaps 64: static int man_node_append(struct man *,
65: struct man_node *);
66: static int man_ptext(struct man *, int, char *);
67: static int man_pmacro(struct man *, int, char *);
1.2 kristaps 68: static void man_free1(struct man *);
1.16 kristaps 69: static int man_alloc1(struct man *);
1.31 kristaps 70: static int pstring(struct man *, int, int,
71: const char *, size_t);
1.1 kristaps 72:
1.32 kristaps 73: #ifdef __linux__
74: extern size_t strlcpy(char *, const char *, size_t);
75: #endif
76:
1.1 kristaps 77:
78: const struct man_node *
1.2 kristaps 79: man_node(const struct man *m)
1.1 kristaps 80: {
81:
1.2 kristaps 82: return(MAN_HALT & m->flags ? NULL : m->first);
1.1 kristaps 83: }
84:
85:
86: const struct man_meta *
1.2 kristaps 87: man_meta(const struct man *m)
1.1 kristaps 88: {
89:
1.2 kristaps 90: return(MAN_HALT & m->flags ? NULL : &m->meta);
1.1 kristaps 91: }
92:
93:
1.15 kristaps 94: int
1.1 kristaps 95: man_reset(struct man *man)
96: {
97:
1.2 kristaps 98: man_free1(man);
1.16 kristaps 99: return(man_alloc1(man));
1.1 kristaps 100: }
101:
102:
103: void
104: man_free(struct man *man)
105: {
106:
1.2 kristaps 107: man_free1(man);
108:
1.1 kristaps 109: if (man->htab)
110: man_hash_free(man->htab);
111: free(man);
112: }
113:
114:
115: struct man *
1.7 kristaps 116: man_alloc(void *data, int pflags, const struct man_cb *cb)
1.1 kristaps 117: {
118: struct man *p;
119:
1.16 kristaps 120: if (NULL == (p = calloc(1, sizeof(struct man))))
121: return(NULL);
1.2 kristaps 122:
1.16 kristaps 123: if ( ! man_alloc1(p)) {
124: free(p);
125: return(NULL);
126: }
1.1 kristaps 127:
1.4 kristaps 128: p->data = data;
1.7 kristaps 129: p->pflags = pflags;
1.16 kristaps 130: (void)memcpy(&p->cb, cb, sizeof(struct man_cb));
1.7 kristaps 131:
1.16 kristaps 132: if (NULL == (p->htab = man_hash_alloc())) {
133: free(p);
134: return(NULL);
135: }
1.1 kristaps 136: return(p);
137: }
138:
139:
140: int
141: man_endparse(struct man *m)
142: {
143:
1.3 kristaps 144: if (MAN_HALT & m->flags)
145: return(0);
146: else if (man_macroend(m))
147: return(1);
148: m->flags |= MAN_HALT;
149: return(0);
1.1 kristaps 150: }
151:
152:
153: int
154: man_parseln(struct man *m, int ln, char *buf)
155: {
156:
157: return('.' == *buf ?
158: man_pmacro(m, ln, buf) :
159: man_ptext(m, ln, buf));
160: }
161:
162:
1.2 kristaps 163: static void
164: man_free1(struct man *man)
165: {
166:
167: if (man->first)
168: man_node_freelist(man->first);
169: if (man->meta.title)
170: free(man->meta.title);
1.6 kristaps 171: if (man->meta.source)
172: free(man->meta.source);
1.2 kristaps 173: if (man->meta.vol)
174: free(man->meta.vol);
175: }
176:
177:
1.16 kristaps 178: static int
1.2 kristaps 179: man_alloc1(struct man *m)
180: {
181:
182: bzero(&m->meta, sizeof(struct man_meta));
183: m->flags = 0;
184: m->last = calloc(1, sizeof(struct man_node));
185: if (NULL == m->last)
1.16 kristaps 186: return(0);
1.2 kristaps 187: m->first = m->last;
188: m->last->type = MAN_ROOT;
189: m->next = MAN_NEXT_CHILD;
1.16 kristaps 190: return(1);
1.2 kristaps 191: }
192:
193:
1.1 kristaps 194: static int
195: man_node_append(struct man *man, struct man_node *p)
196: {
197:
198: assert(man->last);
199: assert(man->first);
200: assert(MAN_ROOT != p->type);
201:
202: switch (man->next) {
203: case (MAN_NEXT_SIBLING):
204: man->last->next = p;
205: p->prev = man->last;
206: p->parent = man->last->parent;
207: break;
208: case (MAN_NEXT_CHILD):
209: man->last->child = p;
210: p->parent = man->last;
211: break;
212: default:
213: abort();
214: /* NOTREACHED */
215: }
1.22 kristaps 216:
217: p->parent->nchild++;
1.1 kristaps 218:
1.29 kristaps 219: if ( ! man_valid_pre(man, p))
220: return(0);
221:
222: switch (p->type) {
223: case (MAN_HEAD):
224: assert(MAN_BLOCK == p->parent->type);
225: p->parent->head = p;
226: break;
227: case (MAN_BODY):
228: assert(MAN_BLOCK == p->parent->type);
229: p->parent->body = p;
230: break;
231: default:
232: break;
233: }
234:
1.2 kristaps 235: man->last = p;
236:
1.1 kristaps 237: switch (p->type) {
1.2 kristaps 238: case (MAN_TEXT):
239: if ( ! man_valid_post(man))
240: return(0);
241: if ( ! man_action_post(man))
242: return(0);
1.1 kristaps 243: break;
244: default:
245: break;
246: }
247:
248: return(1);
249: }
250:
251:
252: static struct man_node *
1.16 kristaps 253: man_node_alloc(int line, int pos, enum man_type type, int tok)
1.1 kristaps 254: {
255: struct man_node *p;
256:
1.16 kristaps 257: p = calloc(1, sizeof(struct man_node));
258: if (NULL == p)
259: return(NULL);
260:
1.1 kristaps 261: p->line = line;
262: p->pos = pos;
263: p->type = type;
1.16 kristaps 264: p->tok = tok;
1.1 kristaps 265: return(p);
266: }
267:
268:
269: int
1.30 kristaps 270: man_elem_alloc(struct man *m, int line, int pos, int tok)
1.1 kristaps 271: {
272: struct man_node *p;
273:
1.16 kristaps 274: p = man_node_alloc(line, pos, MAN_ELEM, tok);
275: if (NULL == p)
276: return(0);
1.30 kristaps 277: if ( ! man_node_append(m, p))
278: return(0);
279: m->next = MAN_NEXT_CHILD;
280: return(1);
1.1 kristaps 281: }
282:
283:
284: int
1.29 kristaps 285: man_head_alloc(struct man *m, int line, int pos, int tok)
286: {
287: struct man_node *p;
288:
289: p = man_node_alloc(line, pos, MAN_HEAD, tok);
290: if (NULL == p)
291: return(0);
292: if ( ! man_node_append(m, p))
293: return(0);
294: m->next = MAN_NEXT_CHILD;
295: return(1);
296: }
297:
298:
299: int
300: man_body_alloc(struct man *m, int line, int pos, int tok)
301: {
302: struct man_node *p;
303:
304: p = man_node_alloc(line, pos, MAN_BODY, tok);
305: if (NULL == p)
306: return(0);
307: if ( ! man_node_append(m, p))
308: return(0);
309: m->next = MAN_NEXT_CHILD;
310: return(1);
311: }
312:
313:
314: int
315: man_block_alloc(struct man *m, int line, int pos, int tok)
316: {
317: struct man_node *p;
318:
319: p = man_node_alloc(line, pos, MAN_BLOCK, tok);
320: if (NULL == p)
321: return(0);
322: if ( ! man_node_append(m, p))
323: return(0);
324: m->next = MAN_NEXT_CHILD;
325: return(1);
326: }
327:
328:
1.31 kristaps 329: static int
330: pstring(struct man *m, int line, int pos,
331: const char *p, size_t len)
1.1 kristaps 332: {
1.31 kristaps 333: struct man_node *n;
334: size_t sv;
1.1 kristaps 335:
1.31 kristaps 336: n = man_node_alloc(line, pos, MAN_TEXT, -1);
337: if (NULL == n)
1.16 kristaps 338: return(0);
1.31 kristaps 339:
340: n->string = malloc(len + 1);
341: if (NULL == n->string) {
342: free(n);
1.16 kristaps 343: return(0);
1.31 kristaps 344: }
345:
346: sv = strlcpy(n->string, p, len + 1);
347:
348: /* Prohibit truncation. */
349: assert(sv < len + 1);
350:
351: if ( ! man_node_append(m, n))
1.30 kristaps 352: return(0);
353: m->next = MAN_NEXT_SIBLING;
354: return(1);
1.1 kristaps 355: }
356:
357:
1.31 kristaps 358: int
359: man_word_alloc(struct man *m, int line, int pos, const char *word)
360: {
361:
362: return(pstring(m, line, pos, word, strlen(word)));
363: }
364:
365:
1.1 kristaps 366: void
367: man_node_free(struct man_node *p)
368: {
369:
370: if (p->string)
371: free(p->string);
1.24 kristaps 372: if (p->parent)
373: p->parent->nchild--;
1.1 kristaps 374: free(p);
375: }
376:
377:
378: void
379: man_node_freelist(struct man_node *p)
380: {
381:
382: if (p->child)
383: man_node_freelist(p->child);
384: if (p->next)
385: man_node_freelist(p->next);
386:
1.24 kristaps 387: assert(0 == p->nchild);
1.1 kristaps 388: man_node_free(p);
389: }
390:
391:
392: static int
393: man_ptext(struct man *m, int line, char *buf)
394: {
1.31 kristaps 395: int i, j;
396:
1.35 kristaps 397: /* Literal free-form text whitespace is preserved. */
398:
399: if (MAN_LITERAL & m->flags) {
400: if ( ! man_word_alloc(m, line, 0, buf))
401: return(0);
402: goto descope;
403: }
404:
1.31 kristaps 405: /* First de-chunk and allocate words. */
406:
407: for (i = 0; ' ' == buf[i]; i++)
408: /* Skip leading whitespace. */ ;
409: if (0 == buf[i]) {
410: if ( ! pstring(m, line, 0, &buf[i], 0))
411: return(0);
412: goto descope;
413: }
414:
415: for (j = i; buf[i]; i++) {
416: if (' ' != buf[i])
417: continue;
418:
419: /* Escaped whitespace. */
420: if (i && ' ' == buf[i] && '\\' == buf[i - 1])
421: continue;
1.1 kristaps 422:
1.31 kristaps 423: buf[i++] = 0;
424: if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
425: return(0);
1.29 kristaps 426:
1.31 kristaps 427: for ( ; ' ' == buf[i]; i++)
428: /* Skip trailing whitespace. */ ;
1.30 kristaps 429:
1.31 kristaps 430: j = i;
431: if (0 == buf[i])
432: break;
433: }
434:
435: if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.1 kristaps 436: return(0);
1.31 kristaps 437:
438: descope:
1.11 kristaps 439:
440: /*
1.29 kristaps 441: * Co-ordinate what happens with having a next-line scope open:
442: * first close out the element scope (if applicable), then close
443: * out the block scope (also if applicable).
1.11 kristaps 444: */
445:
1.29 kristaps 446: if (MAN_ELINE & m->flags) {
447: m->flags &= ~MAN_ELINE;
448: if ( ! man_unscope(m, m->last->parent))
449: return(0);
450: }
451:
452: if ( ! (MAN_BLINE & m->flags))
1.11 kristaps 453: return(1);
1.29 kristaps 454: m->flags &= ~MAN_BLINE;
1.11 kristaps 455:
1.29 kristaps 456: if ( ! man_unscope(m, m->last->parent))
1.11 kristaps 457: return(0);
1.29 kristaps 458: return(man_body_alloc(m, line, 0, m->last->tok));
1.1 kristaps 459: }
460:
461:
462: int
463: man_pmacro(struct man *m, int ln, char *buf)
464: {
1.34 kristaps 465: int i, j, c, ppos, fl;
466: char mac[5];
467: struct man_node *n;
1.1 kristaps 468:
469: /* Comments and empties are quickly ignored. */
470:
1.29 kristaps 471: fl = m->flags;
1.11 kristaps 472:
1.1 kristaps 473: if (0 == buf[1])
1.11 kristaps 474: goto out;
1.1 kristaps 475:
1.9 kristaps 476: i = 1;
477:
478: if (' ' == buf[i]) {
479: i++;
1.1 kristaps 480: while (buf[i] && ' ' == buf[i])
481: i++;
482: if (0 == buf[i])
1.11 kristaps 483: goto out;
1.1 kristaps 484: }
485:
1.10 kristaps 486: ppos = i;
487:
1.1 kristaps 488: /* Copy the first word into a nil-terminated buffer. */
489:
1.10 kristaps 490: for (j = 0; j < 4; j++, i++) {
491: if (0 == (mac[j] = buf[i]))
1.1 kristaps 492: break;
1.10 kristaps 493: else if (' ' == buf[i])
1.1 kristaps 494: break;
495: }
496:
1.9 kristaps 497: mac[j] = 0;
1.1 kristaps 498:
1.9 kristaps 499: if (j == 4 || j < 1) {
1.7 kristaps 500: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.29 kristaps 501: (void)man_perr(m, ln, ppos, WMACROFORM);
1.7 kristaps 502: goto err;
503: }
1.29 kristaps 504: if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
1.7 kristaps 505: goto err;
1.12 kristaps 506: return(1);
1.7 kristaps 507: }
1.1 kristaps 508:
509: if (MAN_MAX == (c = man_hash_find(m->htab, mac))) {
1.7 kristaps 510: if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.29 kristaps 511: (void)man_perr(m, ln, ppos, WMACRO);
1.7 kristaps 512: goto err;
513: }
1.29 kristaps 514: if ( ! man_pwarn(m, ln, ppos, WMACRO))
1.7 kristaps 515: goto err;
1.12 kristaps 516: return(1);
1.1 kristaps 517: }
518:
519: /* The macro is sane. Jump to the next word. */
520:
521: while (buf[i] && ' ' == buf[i])
522: i++;
523:
1.34 kristaps 524: /* Remove prior ELINE macro, if applicable. */
525:
526: if (m->flags & MAN_ELINE) {
527: n = m->last;
528: assert(NULL == n->child);
529: if ( ! man_nwarn(m, n, WLNSCOPE))
530: return(0);
531:
532: if (n->prev) {
533: assert(n != n->parent->child);
534: assert(n == n->prev->next);
535: n->prev->next = NULL;
536: m->last = n->prev;
537: } else {
538: assert(n == n->parent->child);
539: n->parent->child = NULL;
540: m->last = n->parent;
541: }
542:
543: man_node_free(n);
544: m->flags &= ~MAN_ELINE;
545: }
546:
1.1 kristaps 547: /* Begin recursive parse sequence. */
548:
1.29 kristaps 549: assert(man_macros[c].fp);
550:
551: if ( ! (*man_macros[c].fp)(m, c, ln, ppos, &i, buf))
1.1 kristaps 552: goto err;
553:
1.11 kristaps 554: out:
1.29 kristaps 555: if ( ! (MAN_BLINE & fl))
556: return(1);
557:
558: /*
559: * If we've opened a new next-line element scope, then return
560: * now, as the next line will close out the block scope.
561: */
562:
563: if (MAN_ELINE & m->flags)
564: return(1);
565:
566: /* Close out the block scope opened in the prior line. */
1.11 kristaps 567:
1.29 kristaps 568: assert(MAN_BLINE & m->flags);
569: m->flags &= ~MAN_BLINE;
1.11 kristaps 570:
1.29 kristaps 571: if ( ! man_unscope(m, m->last->parent))
572: return(0);
573: return(man_body_alloc(m, ln, 0, m->last->tok));
1.1 kristaps 574:
575: err: /* Error out. */
576:
1.2 kristaps 577: m->flags |= MAN_HALT;
1.1 kristaps 578: return(0);
579: }
1.3 kristaps 580:
1.4 kristaps 581:
582: int
583: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
584: {
585: char buf[256];
586: va_list ap;
587:
588: if (NULL == man->cb.man_err)
589: return(0);
590:
591: va_start(ap, fmt);
592: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
593: va_end(ap);
594: return((*man->cb.man_err)(man->data, ln, pos, buf));
595: }
596:
597:
598: int
599: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
600: {
601: char buf[256];
602: va_list ap;
603:
604: if (NULL == man->cb.man_warn)
605: return(0);
606:
607: va_start(ap, fmt);
608: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
609: va_end(ap);
610: return((*man->cb.man_warn)(man->data, ln, pos, buf));
611: }
612:
613:
1.23 kristaps 614: int
1.27 kristaps 615: man_err(struct man *m, int line, int pos, int iserr, enum merr type)
1.23 kristaps 616: {
617: const char *p;
618:
1.27 kristaps 619: p = __man_merrnames[(int)type];
1.23 kristaps 620: assert(p);
621:
622: if (iserr)
623: return(man_verr(m, line, pos, p));
624:
625: return(man_vwarn(m, line, pos, p));
626: }
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