Annotation of src/usr.bin/mandoc/mdoc.c, Revision 1.21
1.21 ! schwarze 1: /* $Id: mdoc.c,v 1.20 2009/07/26 01:59:46 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: "empty last list column", /* ECOLEMPTY */
29: "unexpected quoted parameter", /* EQUOTPARM */
30: "unterminated quoted parameter", /* EQUOTTERM */
31: "system: malloc error", /* EMALLOC */
32: "argument parameter suggested", /* EARGVAL */
33: "macro not callable", /* ENOCALL */
34: "macro disallowed in prologue", /* EBODYPROL */
35: "macro disallowed in body", /* EPROLBODY */
36: "text disallowed in prologue", /* ETEXTPROL */
37: "blank line disallowed", /* ENOBLANK */
38: "text parameter too long", /* ETOOLONG */
39: "invalid escape sequence", /* EESCAPE */
40: "invalid character", /* EPRINT */
41: "document has no body", /* ENODAT */
42: "document has no prologue", /* ENOPROLOGUE */
43: "expected line arguments", /* ELINE */
44: "invalid AT&T argument", /* EATT */
45: "default name not yet set", /* ENAME */
46: "missing list type", /* ELISTTYPE */
47: "missing display type", /* EDISPTYPE */
48: "too many display types", /* EMULTIDISP */
49: "too many list types", /* EMULTILIST */
50: "NAME section must be first", /* ESECNAME */
51: "badly-formed NAME section", /* ENAMESECINC */
52: "argument repeated", /* EARGREP */
53: "expected boolean parameter", /* EBOOL */
54: "inconsistent column syntax", /* ECOLMIS */
55: "nested display invalid", /* ENESTDISP */
56: "width argument missing", /* EMISSWIDTH */
57: "invalid section for this manual section", /* EWRONGMSEC */
58: "section out of conventional order", /* ESECOOO */
59: "section repeated", /* ESECREP */
60: "invalid standard argument", /* EBADSTAND */
61: "multi-line arguments discouraged", /* ENOMULTILINE */
62: "multi-line arguments suggested", /* EMULTILINE */
63: "line arguments discouraged", /* ENOLINE */
64: "prologue macro out of conventional order", /* EPROLOOO */
65: "prologue macro repeated", /* EPROLREP */
66: "invalid manual section", /* EBADMSEC */
67: "invalid section", /* EBADSEC */
68: "invalid font mode", /* EFONT */
69: "invalid date syntax", /* EBADDATE */
70: "invalid number format", /* ENUMFMT */
71: "superfluous width argument", /* ENOWIDTH */
72: "system: utsname error", /* EUTSNAME */
73: "obsolete macro", /* EOBS */
74: "macro-like parameter", /* EMACPARM */
75: "end-of-line scope violation", /* EIMPBRK */
76: "empty macro ignored", /* EIGNE */
77: "unclosed explicit scope", /* EOPEN */
78: "unterminated quoted phrase", /* EQUOTPHR */
79: "closure macro without prior context", /* ENOCTX */
80: "invalid whitespace after control character", /* ESPACE */
1.18 schwarze 81: "no description found for library" /* ELIB */
1.1 kristaps 82: };
83:
84: const char *const __mdoc_macronames[MDOC_MAX] = {
1.7 schwarze 85: "Ap", "Dd", "Dt", "Os",
1.1 kristaps 86: "Sh", "Ss", "Pp", "D1",
87: "Dl", "Bd", "Ed", "Bl",
88: "El", "It", "Ad", "An",
89: "Ar", "Cd", "Cm", "Dv",
90: "Er", "Ev", "Ex", "Fa",
91: "Fd", "Fl", "Fn", "Ft",
92: "Ic", "In", "Li", "Nd",
93: "Nm", "Op", "Ot", "Pa",
94: "Rv", "St", "Va", "Vt",
95: /* LINTED */
96: "Xr", "\%A", "\%B", "\%D",
97: /* LINTED */
98: "\%I", "\%J", "\%N", "\%O",
99: /* LINTED */
100: "\%P", "\%R", "\%T", "\%V",
101: "Ac", "Ao", "Aq", "At",
102: "Bc", "Bf", "Bo", "Bq",
103: "Bsx", "Bx", "Db", "Dc",
104: "Do", "Dq", "Ec", "Ef",
105: "Em", "Eo", "Fx", "Ms",
106: "No", "Ns", "Nx", "Ox",
107: "Pc", "Pf", "Po", "Pq",
108: "Qc", "Ql", "Qo", "Qq",
109: "Re", "Rs", "Sc", "So",
110: "Sq", "Sm", "Sx", "Sy",
111: "Tn", "Ux", "Xc", "Xo",
112: "Fo", "Fc", "Oo", "Oc",
113: "Bk", "Ek", "Bt", "Hf",
1.7 schwarze 114: "Fr", "Ud", "Lb", "Lp",
115: "Lk", "Mt", "Brq", "Bro",
1.1 kristaps 116: /* LINTED */
1.7 schwarze 117: "Brc", "\%C", "Es", "En",
1.1 kristaps 118: /* LINTED */
1.20 schwarze 119: "Dx", "\%Q", "br", "sp"
1.1 kristaps 120: };
121:
122: const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
123: "split", "nosplit", "ragged",
124: "unfilled", "literal", "file",
125: "offset", "bullet", "dash",
126: "hyphen", "item", "enum",
127: "tag", "diag", "hang",
128: "ohang", "inset", "column",
129: "width", "compact", "std",
130: "filled", "words", "emphasis",
131: "symbolic", "nested"
132: };
133:
134: const char * const *mdoc_macronames = __mdoc_macronames;
135: const char * const *mdoc_argnames = __mdoc_argnames;
136:
137: static void mdoc_free1(struct mdoc *);
138: static int mdoc_alloc1(struct mdoc *);
139: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
140: int, enum mdoc_type);
141: static int node_append(struct mdoc *,
142: struct mdoc_node *);
143: static int parsetext(struct mdoc *, int, char *);
144: static int parsemacro(struct mdoc *, int, char *);
145: static int macrowarn(struct mdoc *, int, const char *);
1.19 schwarze 146: static int pstring(struct mdoc *, int, int,
147: const char *, size_t);
1.16 schwarze 148:
1.1 kristaps 149:
150: const struct mdoc_node *
151: mdoc_node(const struct mdoc *m)
152: {
153:
154: return(MDOC_HALT & m->flags ? NULL : m->first);
155: }
156:
157:
158: const struct mdoc_meta *
159: mdoc_meta(const struct mdoc *m)
160: {
161:
162: return(MDOC_HALT & m->flags ? NULL : &m->meta);
163: }
164:
165:
1.8 schwarze 166: /*
167: * Frees volatile resources (parse tree, meta-data, fields).
168: */
1.1 kristaps 169: static void
170: mdoc_free1(struct mdoc *mdoc)
171: {
172:
173: if (mdoc->first)
174: mdoc_node_freelist(mdoc->first);
175: if (mdoc->meta.title)
176: free(mdoc->meta.title);
177: if (mdoc->meta.os)
178: free(mdoc->meta.os);
179: if (mdoc->meta.name)
180: free(mdoc->meta.name);
181: if (mdoc->meta.arch)
182: free(mdoc->meta.arch);
183: if (mdoc->meta.vol)
184: free(mdoc->meta.vol);
185: }
186:
187:
1.8 schwarze 188: /*
189: * Allocate all volatile resources (parse tree, meta-data, fields).
190: */
1.1 kristaps 191: static int
192: mdoc_alloc1(struct mdoc *mdoc)
193: {
194:
195: bzero(&mdoc->meta, sizeof(struct mdoc_meta));
196: mdoc->flags = 0;
1.9 schwarze 197: mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.1 kristaps 198: mdoc->last = calloc(1, sizeof(struct mdoc_node));
199: if (NULL == mdoc->last)
200: return(0);
201:
202: mdoc->first = mdoc->last;
203: mdoc->last->type = MDOC_ROOT;
204: mdoc->next = MDOC_NEXT_CHILD;
205: return(1);
206: }
207:
208:
209: /*
1.8 schwarze 210: * Free up volatile resources (see mdoc_free1()) then re-initialises the
211: * data with mdoc_alloc1(). After invocation, parse data has been reset
212: * and the parser is ready for re-invocation on a new tree; however,
213: * cross-parse non-volatile data is kept intact.
1.1 kristaps 214: */
215: int
216: mdoc_reset(struct mdoc *mdoc)
217: {
218:
219: mdoc_free1(mdoc);
220: return(mdoc_alloc1(mdoc));
221: }
222:
223:
224: /*
1.8 schwarze 225: * Completely free up all volatile and non-volatile parse resources.
226: * After invocation, the pointer is no longer usable.
1.1 kristaps 227: */
228: void
229: mdoc_free(struct mdoc *mdoc)
230: {
231:
232: mdoc_free1(mdoc);
233: if (mdoc->htab)
234: mdoc_hash_free(mdoc->htab);
235: free(mdoc);
236: }
237:
238:
1.8 schwarze 239: /*
240: * Allocate volatile and non-volatile parse resources.
241: */
1.1 kristaps 242: struct mdoc *
243: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
244: {
245: struct mdoc *p;
246:
247: if (NULL == (p = calloc(1, sizeof(struct mdoc))))
248: return(NULL);
249: if (cb)
250: (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
251:
252: p->data = data;
253: p->pflags = pflags;
254:
255: if (NULL == (p->htab = mdoc_hash_alloc())) {
256: free(p);
257: return(NULL);
258: } else if (mdoc_alloc1(p))
259: return(p);
260:
261: free(p);
262: return(NULL);
263: }
264:
265:
266: /*
267: * Climb back up the parse tree, validating open scopes. Mostly calls
1.8 schwarze 268: * through to macro_end() in macro.c.
1.1 kristaps 269: */
270: int
271: mdoc_endparse(struct mdoc *m)
272: {
273:
274: if (MDOC_HALT & m->flags)
275: return(0);
276: else if (mdoc_macroend(m))
277: return(1);
278: m->flags |= MDOC_HALT;
279: return(0);
280: }
281:
282:
283: /*
284: * Main parse routine. Parses a single line -- really just hands off to
1.8 schwarze 285: * the macro (parsemacro()) or text parser (parsetext()).
1.1 kristaps 286: */
287: int
288: mdoc_parseln(struct mdoc *m, int ln, char *buf)
289: {
290:
291: if (MDOC_HALT & m->flags)
292: return(0);
293:
294: return('.' == *buf ? parsemacro(m, ln, buf) :
295: parsetext(m, ln, buf));
296: }
297:
298:
299: int
1.4 schwarze 300: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
301: const char *fmt, ...)
1.1 kristaps 302: {
303: char buf[256];
304: va_list ap;
305:
306: if (NULL == mdoc->cb.mdoc_err)
307: return(0);
308:
309: va_start(ap, fmt);
310: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
311: va_end(ap);
1.12 schwarze 312:
1.1 kristaps 313: return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
314: }
315:
316:
317: int
1.12 schwarze 318: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1 kristaps 319: {
320: char buf[256];
321: va_list ap;
322:
323: if (NULL == mdoc->cb.mdoc_warn)
324: return(0);
325:
326: va_start(ap, fmt);
327: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
328: va_end(ap);
1.17 schwarze 329:
1.11 schwarze 330: return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, buf));
1.5 schwarze 331: }
332:
333:
334: int
1.14 schwarze 335: mdoc_err(struct mdoc *m, int line, int pos, int iserr, enum merr type)
1.5 schwarze 336: {
1.14 schwarze 337: const char *p;
1.5 schwarze 338:
1.14 schwarze 339: p = __mdoc_merrnames[(int)type];
340: assert(p);
1.5 schwarze 341:
1.14 schwarze 342: if (iserr)
343: return(mdoc_verr(m, line, pos, p));
1.16 schwarze 344:
1.14 schwarze 345: return(mdoc_vwarn(m, line, pos, p));
1.5 schwarze 346: }
347:
348:
349: int
1.1 kristaps 350: mdoc_macro(struct mdoc *m, int tok,
351: int ln, int pp, int *pos, char *buf)
352: {
353:
354: if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.9 schwarze 355: MDOC_PBODY & m->flags)
1.16 schwarze 356: return(mdoc_perr(m, ln, pp, EPROLBODY));
1.1 kristaps 357: if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.9 schwarze 358: ! (MDOC_PBODY & m->flags))
1.16 schwarze 359: return(mdoc_perr(m, ln, pp, EBODYPROL));
1.1 kristaps 360:
361: if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
1.16 schwarze 362: return(mdoc_perr(m, ln, pp, ENOCALL));
1.1 kristaps 363:
364: return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
365: }
366:
367:
368: static int
369: node_append(struct mdoc *mdoc, struct mdoc_node *p)
370: {
371:
372: assert(mdoc->last);
373: assert(mdoc->first);
374: assert(MDOC_ROOT != p->type);
375:
376: switch (mdoc->next) {
377: case (MDOC_NEXT_SIBLING):
378: mdoc->last->next = p;
379: p->prev = mdoc->last;
380: p->parent = mdoc->last->parent;
381: break;
382: case (MDOC_NEXT_CHILD):
383: mdoc->last->child = p;
384: p->parent = mdoc->last;
385: break;
386: default:
387: abort();
388: /* NOTREACHED */
389: }
390:
1.10 schwarze 391: p->parent->nchild++;
392:
1.1 kristaps 393: if ( ! mdoc_valid_pre(mdoc, p))
394: return(0);
395: if ( ! mdoc_action_pre(mdoc, p))
396: return(0);
397:
398: switch (p->type) {
399: case (MDOC_HEAD):
400: assert(MDOC_BLOCK == p->parent->type);
401: p->parent->head = p;
402: break;
403: case (MDOC_TAIL):
404: assert(MDOC_BLOCK == p->parent->type);
405: p->parent->tail = p;
406: break;
407: case (MDOC_BODY):
408: assert(MDOC_BLOCK == p->parent->type);
409: p->parent->body = p;
410: break;
411: default:
412: break;
413: }
414:
415: mdoc->last = p;
416:
417: switch (p->type) {
418: case (MDOC_TEXT):
419: if ( ! mdoc_valid_post(mdoc))
420: return(0);
421: if ( ! mdoc_action_post(mdoc))
422: return(0);
423: break;
424: default:
425: break;
426: }
427:
428: return(1);
429: }
430:
431:
432: static struct mdoc_node *
1.19 schwarze 433: node_alloc(struct mdoc *m, int line,
1.1 kristaps 434: int pos, int tok, enum mdoc_type type)
435: {
436: struct mdoc_node *p;
437:
438: if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
1.19 schwarze 439: (void)mdoc_nerr(m, m->last, EMALLOC);
1.1 kristaps 440: return(NULL);
441: }
442:
1.19 schwarze 443: p->sec = m->lastsec;
1.1 kristaps 444: p->line = line;
445: p->pos = pos;
446: p->tok = tok;
447: if (MDOC_TEXT != (p->type = type))
448: assert(p->tok >= 0);
449:
450: return(p);
451: }
452:
453:
454: int
1.19 schwarze 455: mdoc_tail_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 456: {
457: struct mdoc_node *p;
458:
1.19 schwarze 459: p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.1 kristaps 460: if (NULL == p)
461: return(0);
1.19 schwarze 462: return(node_append(m, p));
1.1 kristaps 463: }
464:
465:
466: int
1.19 schwarze 467: mdoc_head_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 468: {
469: struct mdoc_node *p;
470:
1.19 schwarze 471: assert(m->first);
472: assert(m->last);
1.1 kristaps 473:
1.19 schwarze 474: p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.1 kristaps 475: if (NULL == p)
476: return(0);
1.19 schwarze 477: return(node_append(m, p));
1.1 kristaps 478: }
479:
480:
481: int
1.19 schwarze 482: mdoc_body_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 483: {
484: struct mdoc_node *p;
485:
1.19 schwarze 486: p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.1 kristaps 487: if (NULL == p)
488: return(0);
1.19 schwarze 489: return(node_append(m, p));
1.1 kristaps 490: }
491:
492:
493: int
1.19 schwarze 494: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.1 kristaps 495: int tok, struct mdoc_arg *args)
496: {
497: struct mdoc_node *p;
498:
1.19 schwarze 499: p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.1 kristaps 500: if (NULL == p)
501: return(0);
1.4 schwarze 502: p->args = args;
503: if (p->args)
1.1 kristaps 504: (args->refcnt)++;
1.19 schwarze 505: return(node_append(m, p));
1.1 kristaps 506: }
507:
508:
509: int
1.19 schwarze 510: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.1 kristaps 511: int tok, struct mdoc_arg *args)
512: {
513: struct mdoc_node *p;
514:
1.19 schwarze 515: p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.1 kristaps 516: if (NULL == p)
517: return(0);
1.4 schwarze 518: p->args = args;
519: if (p->args)
1.1 kristaps 520: (args->refcnt)++;
1.19 schwarze 521: return(node_append(m, p));
1.1 kristaps 522: }
523:
524:
1.19 schwarze 525: static int
526: pstring(struct mdoc *m, int line, int pos, const char *p, size_t len)
1.1 kristaps 527: {
1.19 schwarze 528: struct mdoc_node *n;
529: size_t sv;
1.1 kristaps 530:
1.19 schwarze 531: n = node_alloc(m, line, pos, -1, MDOC_TEXT);
532: if (NULL == n)
533: return(mdoc_nerr(m, m->last, EMALLOC));
534:
535: n->string = malloc(len + 1);
536: if (NULL == n->string) {
537: free(n);
538: return(mdoc_nerr(m, m->last, EMALLOC));
1.1 kristaps 539: }
1.15 schwarze 540:
1.19 schwarze 541: sv = strlcpy(n->string, p, len + 1);
542:
543: /* Prohibit truncation. */
544: assert(sv < len + 1);
545:
546: return(node_append(m, n));
547: }
548:
549:
550: int
551: mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
552: {
553:
554: return(pstring(m, line, pos, p, strlen(p)));
1.1 kristaps 555: }
556:
557:
558: void
559: mdoc_node_free(struct mdoc_node *p)
560: {
561:
1.10 schwarze 562: if (p->parent)
563: p->parent->nchild--;
1.1 kristaps 564: if (p->string)
565: free(p->string);
566: if (p->args)
567: mdoc_argv_free(p->args);
568: free(p);
569: }
570:
571:
572: void
573: mdoc_node_freelist(struct mdoc_node *p)
574: {
575:
576: if (p->child)
577: mdoc_node_freelist(p->child);
578: if (p->next)
579: mdoc_node_freelist(p->next);
580:
1.10 schwarze 581: assert(0 == p->nchild);
1.1 kristaps 582: mdoc_node_free(p);
583: }
584:
585:
586: /*
587: * Parse free-form text, that is, a line that does not begin with the
588: * control character.
589: */
590: static int
591: parsetext(struct mdoc *m, int line, char *buf)
592: {
1.19 schwarze 593: int i, j;
1.1 kristaps 594:
1.9 schwarze 595: if (SEC_NONE == m->lastnamed)
1.16 schwarze 596: return(mdoc_perr(m, line, 0, ETEXTPROL));
1.19 schwarze 597:
598: /*
599: * If in literal mode, then pass the buffer directly to the
600: * back-end, as it should be preserved as a single term.
601: */
1.1 kristaps 602:
1.19 schwarze 603: if (MDOC_LITERAL & m->flags) {
604: if ( ! mdoc_word_alloc(m, line, 0, buf))
605: return(0);
606: m->next = MDOC_NEXT_SIBLING;
607: return(1);
608: }
609:
610: /* Disallow blank/white-space lines in non-literal mode. */
611:
612: for (i = 0; ' ' == buf[i]; i++)
613: /* Skip leading whitespace. */ ;
614: if (0 == buf[i])
1.16 schwarze 615: return(mdoc_perr(m, line, 0, ENOBLANK));
1.1 kristaps 616:
1.19 schwarze 617: /*
618: * Break apart a free-form line into tokens. Spaces are
619: * stripped out of the input.
620: */
621:
622: for (j = i; buf[i]; i++) {
623: if (' ' != buf[i])
624: continue;
625:
626: /* Escaped whitespace. */
627: if (i && ' ' == buf[i] && '\\' == buf[i - 1])
628: continue;
629:
630: buf[i++] = 0;
631: if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
632: return(0);
633: m->next = MDOC_NEXT_SIBLING;
634:
635: for ( ; ' ' == buf[i]; i++)
636: /* Skip trailing whitespace. */ ;
637:
638: j = i;
639: if (0 == buf[i])
640: break;
641: }
642:
643: if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.1 kristaps 644: return(0);
645:
646: m->next = MDOC_NEXT_SIBLING;
647: return(1);
648: }
1.19 schwarze 649:
650:
1.1 kristaps 651:
652:
653: static int
654: macrowarn(struct mdoc *m, int ln, const char *buf)
655: {
656: if ( ! (MDOC_IGN_MACRO & m->pflags))
1.13 schwarze 657: return(mdoc_verr(m, ln, 1,
1.1 kristaps 658: "unknown macro: %s%s",
659: buf, strlen(buf) > 3 ? "..." : ""));
1.12 schwarze 660: return(mdoc_vwarn(m, ln, 1, "unknown macro: %s%s",
1.1 kristaps 661: buf, strlen(buf) > 3 ? "..." : ""));
662: }
663:
664:
665: /*
666: * Parse a macro line, that is, a line beginning with the control
667: * character.
668: */
669: int
670: parsemacro(struct mdoc *m, int ln, char *buf)
671: {
672: int i, c;
673: char mac[5];
674:
1.7 schwarze 675: /* Empty lines are ignored. */
1.1 kristaps 676:
677: if (0 == buf[1])
678: return(1);
679:
680: if (' ' == buf[1]) {
681: i = 2;
682: while (buf[i] && ' ' == buf[i])
683: i++;
684: if (0 == buf[i])
685: return(1);
1.16 schwarze 686: return(mdoc_perr(m, ln, 1, ESPACE));
1.1 kristaps 687: }
688:
689: /* Copy the first word into a nil-terminated buffer. */
690:
691: for (i = 1; i < 5; i++) {
692: if (0 == (mac[i - 1] = buf[i]))
693: break;
694: else if (' ' == buf[i])
695: break;
696: }
697:
698: mac[i - 1] = 0;
699:
700: if (i == 5 || i <= 2) {
701: if ( ! macrowarn(m, ln, mac))
702: goto err;
703: return(1);
704: }
705:
706: if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
707: if ( ! macrowarn(m, ln, mac))
708: goto err;
709: return(1);
710: }
711:
712: /* The macro is sane. Jump to the next word. */
713:
714: while (buf[i] && ' ' == buf[i])
715: i++;
716:
717: /* Begin recursive parse sequence. */
718:
719: if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
720: goto err;
721:
722: return(1);
723:
724: err: /* Error out. */
725:
726: m->flags |= MDOC_HALT;
727: return(0);
728: }
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