Annotation of src/usr.bin/mandoc/mdoc.c, Revision 1.22
1.22 ! schwarze 1: /* $Id: mdoc.c,v 1.21 2009/07/26 02:17:29 schwarze Exp $ */
1.1 kristaps 2: /*
1.3 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
1.3 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: *
1.3 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: */
17: #include <assert.h>
18: #include <ctype.h>
19: #include <stdarg.h>
20: #include <stdio.h>
21: #include <stdlib.h>
22: #include <string.h>
23:
24: #include "libmdoc.h"
25:
1.14 schwarze 26: const char *const __mdoc_merrnames[MERRMAX] = {
27: "trailing whitespace", /* ETAILWS */
28: "unexpected quoted parameter", /* EQUOTPARM */
29: "unterminated quoted parameter", /* EQUOTTERM */
30: "system: malloc error", /* EMALLOC */
31: "argument parameter suggested", /* EARGVAL */
32: "macro not callable", /* ENOCALL */
33: "macro disallowed in prologue", /* EBODYPROL */
34: "macro disallowed in body", /* EPROLBODY */
35: "text disallowed in prologue", /* ETEXTPROL */
36: "blank line disallowed", /* ENOBLANK */
37: "text parameter too long", /* ETOOLONG */
38: "invalid escape sequence", /* EESCAPE */
39: "invalid character", /* EPRINT */
40: "document has no body", /* ENODAT */
41: "document has no prologue", /* ENOPROLOGUE */
42: "expected line arguments", /* ELINE */
43: "invalid AT&T argument", /* EATT */
44: "default name not yet set", /* ENAME */
45: "missing list type", /* ELISTTYPE */
46: "missing display type", /* EDISPTYPE */
47: "too many display types", /* EMULTIDISP */
48: "too many list types", /* EMULTILIST */
49: "NAME section must be first", /* ESECNAME */
50: "badly-formed NAME section", /* ENAMESECINC */
51: "argument repeated", /* EARGREP */
52: "expected boolean parameter", /* EBOOL */
53: "inconsistent column syntax", /* ECOLMIS */
54: "nested display invalid", /* ENESTDISP */
55: "width argument missing", /* EMISSWIDTH */
56: "invalid section for this manual section", /* EWRONGMSEC */
57: "section out of conventional order", /* ESECOOO */
58: "section repeated", /* ESECREP */
59: "invalid standard argument", /* EBADSTAND */
60: "multi-line arguments discouraged", /* ENOMULTILINE */
61: "multi-line arguments suggested", /* EMULTILINE */
62: "line arguments discouraged", /* ENOLINE */
63: "prologue macro out of conventional order", /* EPROLOOO */
64: "prologue macro repeated", /* EPROLREP */
65: "invalid manual section", /* EBADMSEC */
66: "invalid section", /* EBADSEC */
67: "invalid font mode", /* EFONT */
68: "invalid date syntax", /* EBADDATE */
69: "invalid number format", /* ENUMFMT */
70: "superfluous width argument", /* ENOWIDTH */
71: "system: utsname error", /* EUTSNAME */
72: "obsolete macro", /* EOBS */
73: "macro-like parameter", /* EMACPARM */
74: "end-of-line scope violation", /* EIMPBRK */
75: "empty macro ignored", /* EIGNE */
76: "unclosed explicit scope", /* EOPEN */
77: "unterminated quoted phrase", /* EQUOTPHR */
78: "closure macro without prior context", /* ENOCTX */
79: "invalid whitespace after control character", /* ESPACE */
1.18 schwarze 80: "no description found for library" /* ELIB */
1.1 kristaps 81: };
82:
83: const char *const __mdoc_macronames[MDOC_MAX] = {
1.7 schwarze 84: "Ap", "Dd", "Dt", "Os",
1.1 kristaps 85: "Sh", "Ss", "Pp", "D1",
86: "Dl", "Bd", "Ed", "Bl",
87: "El", "It", "Ad", "An",
88: "Ar", "Cd", "Cm", "Dv",
89: "Er", "Ev", "Ex", "Fa",
90: "Fd", "Fl", "Fn", "Ft",
91: "Ic", "In", "Li", "Nd",
92: "Nm", "Op", "Ot", "Pa",
93: "Rv", "St", "Va", "Vt",
94: /* LINTED */
95: "Xr", "\%A", "\%B", "\%D",
96: /* LINTED */
97: "\%I", "\%J", "\%N", "\%O",
98: /* LINTED */
99: "\%P", "\%R", "\%T", "\%V",
100: "Ac", "Ao", "Aq", "At",
101: "Bc", "Bf", "Bo", "Bq",
102: "Bsx", "Bx", "Db", "Dc",
103: "Do", "Dq", "Ec", "Ef",
104: "Em", "Eo", "Fx", "Ms",
105: "No", "Ns", "Nx", "Ox",
106: "Pc", "Pf", "Po", "Pq",
107: "Qc", "Ql", "Qo", "Qq",
108: "Re", "Rs", "Sc", "So",
109: "Sq", "Sm", "Sx", "Sy",
110: "Tn", "Ux", "Xc", "Xo",
111: "Fo", "Fc", "Oo", "Oc",
112: "Bk", "Ek", "Bt", "Hf",
1.7 schwarze 113: "Fr", "Ud", "Lb", "Lp",
114: "Lk", "Mt", "Brq", "Bro",
1.1 kristaps 115: /* LINTED */
1.7 schwarze 116: "Brc", "\%C", "Es", "En",
1.1 kristaps 117: /* LINTED */
1.20 schwarze 118: "Dx", "\%Q", "br", "sp"
1.1 kristaps 119: };
120:
121: const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
122: "split", "nosplit", "ragged",
123: "unfilled", "literal", "file",
124: "offset", "bullet", "dash",
125: "hyphen", "item", "enum",
126: "tag", "diag", "hang",
127: "ohang", "inset", "column",
128: "width", "compact", "std",
129: "filled", "words", "emphasis",
130: "symbolic", "nested"
131: };
132:
133: const char * const *mdoc_macronames = __mdoc_macronames;
134: const char * const *mdoc_argnames = __mdoc_argnames;
135:
136: static void mdoc_free1(struct mdoc *);
137: static int mdoc_alloc1(struct mdoc *);
138: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
139: int, enum mdoc_type);
140: static int node_append(struct mdoc *,
141: struct mdoc_node *);
142: static int parsetext(struct mdoc *, int, char *);
143: static int parsemacro(struct mdoc *, int, char *);
144: static int macrowarn(struct mdoc *, int, const char *);
1.19 schwarze 145: static int pstring(struct mdoc *, int, int,
146: const char *, size_t);
1.16 schwarze 147:
1.1 kristaps 148:
149: const struct mdoc_node *
150: mdoc_node(const struct mdoc *m)
151: {
152:
153: return(MDOC_HALT & m->flags ? NULL : m->first);
154: }
155:
156:
157: const struct mdoc_meta *
158: mdoc_meta(const struct mdoc *m)
159: {
160:
161: return(MDOC_HALT & m->flags ? NULL : &m->meta);
162: }
163:
164:
1.8 schwarze 165: /*
166: * Frees volatile resources (parse tree, meta-data, fields).
167: */
1.1 kristaps 168: static void
169: mdoc_free1(struct mdoc *mdoc)
170: {
171:
172: if (mdoc->first)
173: mdoc_node_freelist(mdoc->first);
174: if (mdoc->meta.title)
175: free(mdoc->meta.title);
176: if (mdoc->meta.os)
177: free(mdoc->meta.os);
178: if (mdoc->meta.name)
179: free(mdoc->meta.name);
180: if (mdoc->meta.arch)
181: free(mdoc->meta.arch);
182: if (mdoc->meta.vol)
183: free(mdoc->meta.vol);
184: }
185:
186:
1.8 schwarze 187: /*
188: * Allocate all volatile resources (parse tree, meta-data, fields).
189: */
1.1 kristaps 190: static int
191: mdoc_alloc1(struct mdoc *mdoc)
192: {
193:
194: bzero(&mdoc->meta, sizeof(struct mdoc_meta));
195: mdoc->flags = 0;
1.9 schwarze 196: mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.1 kristaps 197: mdoc->last = calloc(1, sizeof(struct mdoc_node));
198: if (NULL == mdoc->last)
199: return(0);
200:
201: mdoc->first = mdoc->last;
202: mdoc->last->type = MDOC_ROOT;
203: mdoc->next = MDOC_NEXT_CHILD;
204: return(1);
205: }
206:
207:
208: /*
1.8 schwarze 209: * Free up volatile resources (see mdoc_free1()) then re-initialises the
210: * data with mdoc_alloc1(). After invocation, parse data has been reset
211: * and the parser is ready for re-invocation on a new tree; however,
212: * cross-parse non-volatile data is kept intact.
1.1 kristaps 213: */
214: int
215: mdoc_reset(struct mdoc *mdoc)
216: {
217:
218: mdoc_free1(mdoc);
219: return(mdoc_alloc1(mdoc));
220: }
221:
222:
223: /*
1.8 schwarze 224: * Completely free up all volatile and non-volatile parse resources.
225: * After invocation, the pointer is no longer usable.
1.1 kristaps 226: */
227: void
228: mdoc_free(struct mdoc *mdoc)
229: {
230:
231: mdoc_free1(mdoc);
232: if (mdoc->htab)
233: mdoc_hash_free(mdoc->htab);
234: free(mdoc);
235: }
236:
237:
1.8 schwarze 238: /*
239: * Allocate volatile and non-volatile parse resources.
240: */
1.1 kristaps 241: struct mdoc *
242: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
243: {
244: struct mdoc *p;
245:
246: if (NULL == (p = calloc(1, sizeof(struct mdoc))))
247: return(NULL);
248: if (cb)
249: (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
250:
251: p->data = data;
252: p->pflags = pflags;
253:
254: if (NULL == (p->htab = mdoc_hash_alloc())) {
255: free(p);
256: return(NULL);
257: } else if (mdoc_alloc1(p))
258: return(p);
259:
260: free(p);
261: return(NULL);
262: }
263:
264:
265: /*
266: * Climb back up the parse tree, validating open scopes. Mostly calls
1.8 schwarze 267: * through to macro_end() in macro.c.
1.1 kristaps 268: */
269: int
270: mdoc_endparse(struct mdoc *m)
271: {
272:
273: if (MDOC_HALT & m->flags)
274: return(0);
275: else if (mdoc_macroend(m))
276: return(1);
277: m->flags |= MDOC_HALT;
278: return(0);
279: }
280:
281:
282: /*
283: * Main parse routine. Parses a single line -- really just hands off to
1.8 schwarze 284: * the macro (parsemacro()) or text parser (parsetext()).
1.1 kristaps 285: */
286: int
287: mdoc_parseln(struct mdoc *m, int ln, char *buf)
288: {
289:
290: if (MDOC_HALT & m->flags)
291: return(0);
292:
293: return('.' == *buf ? parsemacro(m, ln, buf) :
294: parsetext(m, ln, buf));
295: }
296:
297:
298: int
1.4 schwarze 299: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
300: const char *fmt, ...)
1.1 kristaps 301: {
302: char buf[256];
303: va_list ap;
304:
305: if (NULL == mdoc->cb.mdoc_err)
306: return(0);
307:
308: va_start(ap, fmt);
309: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
310: va_end(ap);
1.12 schwarze 311:
1.1 kristaps 312: return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
313: }
314:
315:
316: int
1.12 schwarze 317: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1 kristaps 318: {
319: char buf[256];
320: va_list ap;
321:
322: if (NULL == mdoc->cb.mdoc_warn)
323: return(0);
324:
325: va_start(ap, fmt);
326: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
327: va_end(ap);
1.17 schwarze 328:
1.11 schwarze 329: return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, buf));
1.5 schwarze 330: }
331:
332:
333: int
1.14 schwarze 334: mdoc_err(struct mdoc *m, int line, int pos, int iserr, enum merr type)
1.5 schwarze 335: {
1.14 schwarze 336: const char *p;
1.5 schwarze 337:
1.14 schwarze 338: p = __mdoc_merrnames[(int)type];
339: assert(p);
1.5 schwarze 340:
1.14 schwarze 341: if (iserr)
342: return(mdoc_verr(m, line, pos, p));
1.16 schwarze 343:
1.14 schwarze 344: return(mdoc_vwarn(m, line, pos, p));
1.5 schwarze 345: }
346:
347:
348: int
1.1 kristaps 349: mdoc_macro(struct mdoc *m, int tok,
350: int ln, int pp, int *pos, char *buf)
351: {
352:
353: if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.9 schwarze 354: MDOC_PBODY & m->flags)
1.16 schwarze 355: return(mdoc_perr(m, ln, pp, EPROLBODY));
1.1 kristaps 356: if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.9 schwarze 357: ! (MDOC_PBODY & m->flags))
1.16 schwarze 358: return(mdoc_perr(m, ln, pp, EBODYPROL));
1.1 kristaps 359:
360: if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
1.16 schwarze 361: return(mdoc_perr(m, ln, pp, ENOCALL));
1.1 kristaps 362:
363: return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
364: }
365:
366:
367: static int
368: node_append(struct mdoc *mdoc, struct mdoc_node *p)
369: {
370:
371: assert(mdoc->last);
372: assert(mdoc->first);
373: assert(MDOC_ROOT != p->type);
374:
375: switch (mdoc->next) {
376: case (MDOC_NEXT_SIBLING):
377: mdoc->last->next = p;
378: p->prev = mdoc->last;
379: p->parent = mdoc->last->parent;
380: break;
381: case (MDOC_NEXT_CHILD):
382: mdoc->last->child = p;
383: p->parent = mdoc->last;
384: break;
385: default:
386: abort();
387: /* NOTREACHED */
388: }
389:
1.10 schwarze 390: p->parent->nchild++;
391:
1.1 kristaps 392: if ( ! mdoc_valid_pre(mdoc, p))
393: return(0);
394: if ( ! mdoc_action_pre(mdoc, p))
395: return(0);
396:
397: switch (p->type) {
398: case (MDOC_HEAD):
399: assert(MDOC_BLOCK == p->parent->type);
400: p->parent->head = p;
401: break;
402: case (MDOC_TAIL):
403: assert(MDOC_BLOCK == p->parent->type);
404: p->parent->tail = p;
405: break;
406: case (MDOC_BODY):
407: assert(MDOC_BLOCK == p->parent->type);
408: p->parent->body = p;
409: break;
410: default:
411: break;
412: }
413:
414: mdoc->last = p;
415:
416: switch (p->type) {
417: case (MDOC_TEXT):
418: if ( ! mdoc_valid_post(mdoc))
419: return(0);
420: if ( ! mdoc_action_post(mdoc))
421: return(0);
422: break;
423: default:
424: break;
425: }
426:
427: return(1);
428: }
429:
430:
431: static struct mdoc_node *
1.19 schwarze 432: node_alloc(struct mdoc *m, int line,
1.1 kristaps 433: int pos, int tok, enum mdoc_type type)
434: {
435: struct mdoc_node *p;
436:
437: if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
1.19 schwarze 438: (void)mdoc_nerr(m, m->last, EMALLOC);
1.1 kristaps 439: return(NULL);
440: }
441:
1.19 schwarze 442: p->sec = m->lastsec;
1.1 kristaps 443: p->line = line;
444: p->pos = pos;
445: p->tok = tok;
446: if (MDOC_TEXT != (p->type = type))
447: assert(p->tok >= 0);
448:
449: return(p);
450: }
451:
452:
453: int
1.19 schwarze 454: mdoc_tail_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 455: {
456: struct mdoc_node *p;
457:
1.19 schwarze 458: p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.1 kristaps 459: if (NULL == p)
460: return(0);
1.19 schwarze 461: return(node_append(m, p));
1.1 kristaps 462: }
463:
464:
465: int
1.19 schwarze 466: mdoc_head_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 467: {
468: struct mdoc_node *p;
469:
1.19 schwarze 470: assert(m->first);
471: assert(m->last);
1.1 kristaps 472:
1.19 schwarze 473: p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.1 kristaps 474: if (NULL == p)
475: return(0);
1.19 schwarze 476: return(node_append(m, p));
1.1 kristaps 477: }
478:
479:
480: int
1.19 schwarze 481: mdoc_body_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 482: {
483: struct mdoc_node *p;
484:
1.19 schwarze 485: p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.1 kristaps 486: if (NULL == p)
487: return(0);
1.19 schwarze 488: return(node_append(m, p));
1.1 kristaps 489: }
490:
491:
492: int
1.19 schwarze 493: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.1 kristaps 494: int tok, struct mdoc_arg *args)
495: {
496: struct mdoc_node *p;
497:
1.19 schwarze 498: p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.1 kristaps 499: if (NULL == p)
500: return(0);
1.4 schwarze 501: p->args = args;
502: if (p->args)
1.1 kristaps 503: (args->refcnt)++;
1.19 schwarze 504: return(node_append(m, p));
1.1 kristaps 505: }
506:
507:
508: int
1.19 schwarze 509: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.1 kristaps 510: int tok, struct mdoc_arg *args)
511: {
512: struct mdoc_node *p;
513:
1.19 schwarze 514: p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.1 kristaps 515: if (NULL == p)
516: return(0);
1.4 schwarze 517: p->args = args;
518: if (p->args)
1.1 kristaps 519: (args->refcnt)++;
1.19 schwarze 520: return(node_append(m, p));
1.1 kristaps 521: }
522:
523:
1.19 schwarze 524: static int
525: pstring(struct mdoc *m, int line, int pos, const char *p, size_t len)
1.1 kristaps 526: {
1.19 schwarze 527: struct mdoc_node *n;
528: size_t sv;
1.1 kristaps 529:
1.19 schwarze 530: n = node_alloc(m, line, pos, -1, MDOC_TEXT);
531: if (NULL == n)
532: return(mdoc_nerr(m, m->last, EMALLOC));
533:
534: n->string = malloc(len + 1);
535: if (NULL == n->string) {
536: free(n);
537: return(mdoc_nerr(m, m->last, EMALLOC));
1.1 kristaps 538: }
1.15 schwarze 539:
1.19 schwarze 540: sv = strlcpy(n->string, p, len + 1);
541:
542: /* Prohibit truncation. */
543: assert(sv < len + 1);
544:
545: return(node_append(m, n));
546: }
547:
548:
549: int
550: mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
551: {
552:
553: return(pstring(m, line, pos, p, strlen(p)));
1.1 kristaps 554: }
555:
556:
557: void
558: mdoc_node_free(struct mdoc_node *p)
559: {
560:
1.10 schwarze 561: if (p->parent)
562: p->parent->nchild--;
1.1 kristaps 563: if (p->string)
564: free(p->string);
565: if (p->args)
566: mdoc_argv_free(p->args);
567: free(p);
568: }
569:
570:
571: void
572: mdoc_node_freelist(struct mdoc_node *p)
573: {
574:
575: if (p->child)
576: mdoc_node_freelist(p->child);
577: if (p->next)
578: mdoc_node_freelist(p->next);
579:
1.10 schwarze 580: assert(0 == p->nchild);
1.1 kristaps 581: mdoc_node_free(p);
582: }
583:
584:
585: /*
586: * Parse free-form text, that is, a line that does not begin with the
587: * control character.
588: */
589: static int
590: parsetext(struct mdoc *m, int line, char *buf)
591: {
1.19 schwarze 592: int i, j;
1.1 kristaps 593:
1.9 schwarze 594: if (SEC_NONE == m->lastnamed)
1.16 schwarze 595: return(mdoc_perr(m, line, 0, ETEXTPROL));
1.19 schwarze 596:
597: /*
598: * If in literal mode, then pass the buffer directly to the
599: * back-end, as it should be preserved as a single term.
600: */
1.1 kristaps 601:
1.19 schwarze 602: if (MDOC_LITERAL & m->flags) {
603: if ( ! mdoc_word_alloc(m, line, 0, buf))
604: return(0);
605: m->next = MDOC_NEXT_SIBLING;
606: return(1);
607: }
608:
609: /* Disallow blank/white-space lines in non-literal mode. */
610:
611: for (i = 0; ' ' == buf[i]; i++)
612: /* Skip leading whitespace. */ ;
613: if (0 == buf[i])
1.16 schwarze 614: return(mdoc_perr(m, line, 0, ENOBLANK));
1.1 kristaps 615:
1.19 schwarze 616: /*
617: * Break apart a free-form line into tokens. Spaces are
618: * stripped out of the input.
619: */
620:
621: for (j = i; buf[i]; i++) {
622: if (' ' != buf[i])
623: continue;
624:
625: /* Escaped whitespace. */
626: if (i && ' ' == buf[i] && '\\' == buf[i - 1])
627: continue;
628:
629: buf[i++] = 0;
630: if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
631: return(0);
632: m->next = MDOC_NEXT_SIBLING;
633:
634: for ( ; ' ' == buf[i]; i++)
635: /* Skip trailing whitespace. */ ;
636:
637: j = i;
638: if (0 == buf[i])
639: break;
640: }
641:
642: if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.1 kristaps 643: return(0);
644:
645: m->next = MDOC_NEXT_SIBLING;
646: return(1);
647: }
1.19 schwarze 648:
649:
1.1 kristaps 650:
651:
652: static int
653: macrowarn(struct mdoc *m, int ln, const char *buf)
654: {
655: if ( ! (MDOC_IGN_MACRO & m->pflags))
1.13 schwarze 656: return(mdoc_verr(m, ln, 1,
1.1 kristaps 657: "unknown macro: %s%s",
658: buf, strlen(buf) > 3 ? "..." : ""));
1.12 schwarze 659: return(mdoc_vwarn(m, ln, 1, "unknown macro: %s%s",
1.1 kristaps 660: buf, strlen(buf) > 3 ? "..." : ""));
661: }
662:
663:
664: /*
665: * Parse a macro line, that is, a line beginning with the control
666: * character.
667: */
668: int
669: parsemacro(struct mdoc *m, int ln, char *buf)
670: {
671: int i, c;
672: char mac[5];
673:
1.7 schwarze 674: /* Empty lines are ignored. */
1.1 kristaps 675:
676: if (0 == buf[1])
677: return(1);
678:
679: if (' ' == buf[1]) {
680: i = 2;
681: while (buf[i] && ' ' == buf[i])
682: i++;
683: if (0 == buf[i])
684: return(1);
1.16 schwarze 685: return(mdoc_perr(m, ln, 1, ESPACE));
1.1 kristaps 686: }
687:
688: /* Copy the first word into a nil-terminated buffer. */
689:
690: for (i = 1; i < 5; i++) {
691: if (0 == (mac[i - 1] = buf[i]))
692: break;
693: else if (' ' == buf[i])
694: break;
695: }
696:
697: mac[i - 1] = 0;
698:
699: if (i == 5 || i <= 2) {
700: if ( ! macrowarn(m, ln, mac))
701: goto err;
702: return(1);
703: }
704:
705: if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
706: if ( ! macrowarn(m, ln, mac))
707: goto err;
708: return(1);
709: }
710:
711: /* The macro is sane. Jump to the next word. */
712:
713: while (buf[i] && ' ' == buf[i])
714: i++;
715:
716: /* Begin recursive parse sequence. */
717:
718: if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
719: goto err;
720:
721: return(1);
722:
723: err: /* Error out. */
724:
725: m->flags |= MDOC_HALT;
726: return(0);
727: }
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