Annotation of mandoc/mdoc.c, Revision 1.73
1.73 ! kristaps 1: /* $Id: mdoc.c,v 1.72 2009/03/23 15:41:09 kristaps Exp $ */
1.1 kristaps 2: /*
1.66 kristaps 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
1.1 kristaps 4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the
7: * above copyright notice and this permission notice appear in all
8: * copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11: * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12: * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
13: * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14: * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
15: * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
16: * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17: * PERFORMANCE OF THIS SOFTWARE.
18: */
19: #include <assert.h>
20: #include <ctype.h>
21: #include <stdarg.h>
1.73 ! kristaps 22: #include <stdio.h>
1.1 kristaps 23: #include <stdlib.h>
24: #include <string.h>
25:
1.70 kristaps 26: #include "libmdoc.h"
1.1 kristaps 27:
1.73 ! kristaps 28: enum merr {
! 29: ENOCALL,
! 30: EBODYPROL,
! 31: EPROLBODY,
! 32: ESPACE,
! 33: ETEXTPROL,
! 34: ENOBLANK,
! 35: EMALLOC
! 36: };
1.41 kristaps 37:
1.1 kristaps 38: const char *const __mdoc_macronames[MDOC_MAX] = {
39: "\\\"", "Dd", "Dt", "Os",
40: "Sh", "Ss", "Pp", "D1",
41: "Dl", "Bd", "Ed", "Bl",
42: "El", "It", "Ad", "An",
43: "Ar", "Cd", "Cm", "Dv",
44: "Er", "Ev", "Ex", "Fa",
45: "Fd", "Fl", "Fn", "Ft",
46: "Ic", "In", "Li", "Nd",
47: "Nm", "Op", "Ot", "Pa",
48: "Rv", "St", "Va", "Vt",
49: /* LINTED */
50: "Xr", "\%A", "\%B", "\%D",
51: /* LINTED */
52: "\%I", "\%J", "\%N", "\%O",
53: /* LINTED */
54: "\%P", "\%R", "\%T", "\%V",
55: "Ac", "Ao", "Aq", "At",
56: "Bc", "Bf", "Bo", "Bq",
57: "Bsx", "Bx", "Db", "Dc",
58: "Do", "Dq", "Ec", "Ef",
59: "Em", "Eo", "Fx", "Ms",
60: "No", "Ns", "Nx", "Ox",
61: "Pc", "Pf", "Po", "Pq",
62: "Qc", "Ql", "Qo", "Qq",
63: "Re", "Rs", "Sc", "So",
64: "Sq", "Sm", "Sx", "Sy",
65: "Tn", "Ux", "Xc", "Xo",
66: "Fo", "Fc", "Oo", "Oc",
67: "Bk", "Ek", "Bt", "Hf",
1.57 kristaps 68: "Fr", "Ud", "Lb", "Ap",
1.61 kristaps 69: "Lp", "Lk", "Mt", "Brq",
1.64 kristaps 70: /* LINTED */
1.65 kristaps 71: "Bro", "Brc", "\%C", "Es",
1.69 kristaps 72: /* LINTED */
73: "En", "Dx", "\%Q"
1.1 kristaps 74: };
75:
76: const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
77: "split", "nosplit", "ragged",
78: "unfilled", "literal", "file",
79: "offset", "bullet", "dash",
80: "hyphen", "item", "enum",
81: "tag", "diag", "hang",
82: "ohang", "inset", "column",
83: "width", "compact", "std",
1.52 kristaps 84: "filled", "words", "emphasis",
1.64 kristaps 85: "symbolic", "nested"
1.1 kristaps 86: };
87:
88: const char * const *mdoc_macronames = __mdoc_macronames;
89: const char * const *mdoc_argnames = __mdoc_argnames;
90:
1.73 ! kristaps 91: static void mdoc_free1(struct mdoc *);
! 92: static int mdoc_alloc1(struct mdoc *);
! 93: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
! 94: int, enum mdoc_type);
! 95: static int node_append(struct mdoc *,
1.71 kristaps 96: struct mdoc_node *);
97: static int parsetext(struct mdoc *, int, char *);
98: static int parsemacro(struct mdoc *, int, char *);
99: static int macrowarn(struct mdoc *, int, const char *);
1.73 ! kristaps 100: static int perr(struct mdoc *, int, int, enum merr);
1.71 kristaps 101:
1.73 ! kristaps 102: #define verr(m, t) perr((m), (m)->last->line, (m)->last->pos, (t))
1.45 kristaps 103:
1.68 kristaps 104: /*
105: * Get the first (root) node of the parse tree.
106: */
1.1 kristaps 107: const struct mdoc_node *
1.71 kristaps 108: mdoc_node(const struct mdoc *m)
1.1 kristaps 109: {
110:
1.71 kristaps 111: return(MDOC_HALT & m->flags ? NULL : m->first);
1.1 kristaps 112: }
113:
114:
1.37 kristaps 115: const struct mdoc_meta *
1.71 kristaps 116: mdoc_meta(const struct mdoc *m)
1.37 kristaps 117: {
118:
1.71 kristaps 119: return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37 kristaps 120: }
121:
122:
1.73 ! kristaps 123: static void
! 124: mdoc_free1(struct mdoc *mdoc)
1.67 kristaps 125: {
126:
127: if (mdoc->first)
128: mdoc_node_freelist(mdoc->first);
129: if (mdoc->meta.title)
130: free(mdoc->meta.title);
131: if (mdoc->meta.os)
132: free(mdoc->meta.os);
133: if (mdoc->meta.name)
134: free(mdoc->meta.name);
135: if (mdoc->meta.arch)
136: free(mdoc->meta.arch);
137: if (mdoc->meta.vol)
138: free(mdoc->meta.vol);
1.73 ! kristaps 139: }
! 140:
! 141:
! 142: static int
! 143: mdoc_alloc1(struct mdoc *mdoc)
! 144: {
1.67 kristaps 145:
146: bzero(&mdoc->meta, sizeof(struct mdoc_meta));
147: mdoc->flags = 0;
148: mdoc->lastnamed = mdoc->lastsec = 0;
1.70 kristaps 149: mdoc->last = calloc(1, sizeof(struct mdoc_node));
150: if (NULL == mdoc->last)
1.73 ! kristaps 151: return(0);
! 152:
1.70 kristaps 153: mdoc->first = mdoc->last;
1.67 kristaps 154: mdoc->last->type = MDOC_ROOT;
155: mdoc->next = MDOC_NEXT_CHILD;
1.73 ! kristaps 156: return(1);
! 157: }
! 158:
! 159:
! 160: /*
! 161: * Free up all resources contributed by a parse: the node tree,
! 162: * meta-data and so on. Then reallocate the root node for another
! 163: * parse.
! 164: */
! 165: int
! 166: mdoc_reset(struct mdoc *mdoc)
! 167: {
! 168:
! 169: mdoc_free1(mdoc);
! 170: return(mdoc_alloc1(mdoc));
1.67 kristaps 171: }
172:
173:
1.68 kristaps 174: /*
175: * Completely free up all resources.
176: */
1.67 kristaps 177: void
1.38 kristaps 178: mdoc_free(struct mdoc *mdoc)
1.34 kristaps 179: {
180:
1.73 ! kristaps 181: mdoc_free1(mdoc);
1.68 kristaps 182: if (mdoc->htab)
183: mdoc_tokhash_free(mdoc->htab);
1.1 kristaps 184: free(mdoc);
185: }
186:
187:
188: struct mdoc *
1.55 kristaps 189: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1 kristaps 190: {
191: struct mdoc *p;
192:
1.70 kristaps 193: if (NULL == (p = calloc(1, sizeof(struct mdoc))))
1.73 ! kristaps 194: return(NULL);
1.1 kristaps 195:
196: p->data = data;
1.73 ! kristaps 197: p->htab = mdoc_tokhash_alloc();
! 198: p->pflags = pflags;
! 199:
1.33 kristaps 200: if (cb)
201: (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1 kristaps 202:
1.73 ! kristaps 203: if (mdoc_alloc1(p))
! 204: return(p);
! 205: free(p);
! 206: return(NULL);
1.1 kristaps 207: }
208:
209:
1.68 kristaps 210: /*
211: * Climb back up the parse tree, validating open scopes. Mostly calls
212: * through to macro_end in macro.c.
213: */
1.1 kristaps 214: int
1.72 kristaps 215: mdoc_endparse(struct mdoc *m)
1.20 kristaps 216: {
217:
1.72 kristaps 218: if (MDOC_HALT & m->flags)
1.20 kristaps 219: return(0);
1.72 kristaps 220: else if (mdoc_macroend(m))
1.20 kristaps 221: return(1);
1.72 kristaps 222: m->flags |= MDOC_HALT;
223: return(0);
1.20 kristaps 224: }
225:
226:
1.50 kristaps 227: /*
1.53 kristaps 228: * Main parse routine. Parses a single line -- really just hands off to
229: * the macro or text parser.
1.50 kristaps 230: */
1.20 kristaps 231: int
1.53 kristaps 232: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1 kristaps 233: {
234:
1.53 kristaps 235: /* If in error-mode, then we parse no more. */
1.50 kristaps 236:
1.53 kristaps 237: if (MDOC_HALT & m->flags)
1.20 kristaps 238: return(0);
1.50 kristaps 239:
1.53 kristaps 240: return('.' == *buf ? parsemacro(m, ln, buf) :
241: parsetext(m, ln, buf));
1.1 kristaps 242: }
243:
244:
245: void
1.31 kristaps 246: mdoc_vmsg(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1 kristaps 247: {
1.31 kristaps 248: char buf[256];
1.23 kristaps 249: va_list ap;
1.1 kristaps 250:
251: if (NULL == mdoc->cb.mdoc_msg)
252: return;
253:
254: va_start(ap, fmt);
1.31 kristaps 255: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1.1 kristaps 256: va_end(ap);
1.31 kristaps 257: (*mdoc->cb.mdoc_msg)(mdoc->data, ln, pos, buf);
1.1 kristaps 258: }
259:
260:
261: int
1.31 kristaps 262: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
263: const char *fmt, ...)
1.1 kristaps 264: {
1.31 kristaps 265: char buf[256];
266: va_list ap;
1.1 kristaps 267:
268: if (NULL == mdoc->cb.mdoc_err)
269: return(0);
1.31 kristaps 270:
271: va_start(ap, fmt);
272: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
273: va_end(ap);
274: return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1 kristaps 275: }
276:
277:
278: int
1.31 kristaps 279: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
280: enum mdoc_warn type, const char *fmt, ...)
1.1 kristaps 281: {
1.31 kristaps 282: char buf[256];
283: va_list ap;
1.1 kristaps 284:
285: if (NULL == mdoc->cb.mdoc_warn)
286: return(0);
1.31 kristaps 287:
288: va_start(ap, fmt);
289: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
290: va_end(ap);
291: return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
1.1 kristaps 292: }
293:
294:
295: int
1.53 kristaps 296: mdoc_macro(struct mdoc *m, int tok,
297: int ln, int pp, int *pos, char *buf)
1.1 kristaps 298: {
299:
1.53 kristaps 300: /* FIXME - these should happen during validation. */
1.31 kristaps 301:
1.44 kristaps 302: if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.53 kristaps 303: SEC_PROLOGUE != m->lastnamed)
1.73 ! kristaps 304: return(perr(m, ln, pp, EPROLBODY));
1.53 kristaps 305:
1.44 kristaps 306: if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.53 kristaps 307: SEC_PROLOGUE == m->lastnamed)
1.73 ! kristaps 308: return(perr(m, ln, pp, EBODYPROL));
1.53 kristaps 309:
310: if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
1.73 ! kristaps 311: return(perr(m, ln, pp, ENOCALL));
1.53 kristaps 312:
313: return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.1 kristaps 314: }
315:
316:
1.23 kristaps 317: static int
1.73 ! kristaps 318: perr(struct mdoc *m, int line, int pos, enum merr type)
! 319: {
! 320: char *p;
! 321:
! 322: p = NULL;
! 323: switch (type) {
! 324: case (ENOCALL):
! 325: p = "not callable";
! 326: break;
! 327: case (EPROLBODY):
! 328: p = "macro disallowed in document body";
! 329: break;
! 330: case (EBODYPROL):
! 331: p = "macro disallowed in document prologue";
! 332: break;
! 333: case (EMALLOC):
! 334: p = "memory exhausted";
! 335: break;
! 336: case (ETEXTPROL):
! 337: p = "text disallowed in document prologue";
! 338: break;
! 339: case (ENOBLANK):
! 340: p = "blank lines disallowed in non-literal contexts";
! 341: break;
! 342: case (ESPACE):
! 343: p = "whitespace disallowed after delimiter";
! 344: break;
! 345: }
! 346: assert(p);
! 347: return(mdoc_perr(m, line, pos, p));
! 348: }
! 349:
! 350:
! 351: static int
! 352: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1 kristaps 353: {
354:
1.25 kristaps 355: assert(mdoc->last);
356: assert(mdoc->first);
357: assert(MDOC_ROOT != p->type);
1.1 kristaps 358:
1.13 kristaps 359: switch (mdoc->next) {
360: case (MDOC_NEXT_SIBLING):
1.6 kristaps 361: mdoc->last->next = p;
362: p->prev = mdoc->last;
1.13 kristaps 363: p->parent = mdoc->last->parent;
1.1 kristaps 364: break;
1.13 kristaps 365: case (MDOC_NEXT_CHILD):
366: mdoc->last->child = p;
1.1 kristaps 367: p->parent = mdoc->last;
368: break;
369: default:
1.13 kristaps 370: abort();
371: /* NOTREACHED */
1.1 kristaps 372: }
373:
1.23 kristaps 374: if ( ! mdoc_valid_pre(mdoc, p))
375: return(0);
1.68 kristaps 376: if ( ! mdoc_action_pre(mdoc, p))
377: return(0);
1.27 kristaps 378:
379: switch (p->type) {
380: case (MDOC_HEAD):
381: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 382: p->parent->head = p;
1.27 kristaps 383: break;
384: case (MDOC_TAIL):
385: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 386: p->parent->tail = p;
1.27 kristaps 387: break;
388: case (MDOC_BODY):
389: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 390: p->parent->body = p;
1.27 kristaps 391: break;
392: default:
393: break;
394: }
395:
1.1 kristaps 396: mdoc->last = p;
1.71 kristaps 397:
398: switch (p->type) {
399: case (MDOC_TEXT):
400: if ( ! mdoc_valid_post(mdoc))
401: return(0);
402: if ( ! mdoc_action_post(mdoc))
403: return(0);
404: break;
405: default:
406: break;
407: }
408:
1.23 kristaps 409: return(1);
1.1 kristaps 410: }
411:
412:
1.45 kristaps 413: static struct mdoc_node *
1.73 ! kristaps 414: node_alloc(struct mdoc *mdoc, int line,
! 415: int pos, int tok, enum mdoc_type type)
1.45 kristaps 416: {
1.46 kristaps 417: struct mdoc_node *p;
418:
1.73 ! kristaps 419: if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
! 420: (void)verr(mdoc, EMALLOC);
! 421: return(NULL);
! 422: }
! 423:
1.46 kristaps 424: p->sec = mdoc->lastsec;
1.73 ! kristaps 425: p->line = line;
! 426: p->pos = pos;
! 427: p->tok = tok;
! 428: if (MDOC_TEXT != (p->type = type))
! 429: assert(p->tok >= 0);
1.45 kristaps 430:
1.46 kristaps 431: return(p);
1.45 kristaps 432: }
433:
434:
1.23 kristaps 435: int
1.22 kristaps 436: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17 kristaps 437: {
438: struct mdoc_node *p;
439:
1.73 ! kristaps 440: p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
! 441: if (NULL == p)
! 442: return(0);
! 443: return(node_append(mdoc, p));
1.17 kristaps 444: }
445:
446:
1.23 kristaps 447: int
1.22 kristaps 448: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1 kristaps 449: {
450: struct mdoc_node *p;
451:
452: assert(mdoc->first);
453: assert(mdoc->last);
454:
1.73 ! kristaps 455: p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
! 456: if (NULL == p)
! 457: return(0);
! 458: return(node_append(mdoc, p));
1.1 kristaps 459: }
460:
461:
1.23 kristaps 462: int
1.22 kristaps 463: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1 kristaps 464: {
465: struct mdoc_node *p;
466:
1.73 ! kristaps 467: p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
! 468: if (NULL == p)
! 469: return(0);
! 470: return(node_append(mdoc, p));
1.1 kristaps 471: }
472:
473:
1.23 kristaps 474: int
1.22 kristaps 475: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53 kristaps 476: int tok, struct mdoc_arg *args)
1.1 kristaps 477: {
478: struct mdoc_node *p;
479:
1.73 ! kristaps 480: p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
! 481: if (NULL == p)
! 482: return(0);
! 483: if ((p->args = args))
1.53 kristaps 484: (args->refcnt)++;
1.73 ! kristaps 485: return(node_append(mdoc, p));
1.1 kristaps 486: }
487:
488:
1.23 kristaps 489: int
1.22 kristaps 490: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53 kristaps 491: int tok, struct mdoc_arg *args)
1.1 kristaps 492: {
493: struct mdoc_node *p;
494:
1.73 ! kristaps 495: p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
! 496: if (NULL == p)
! 497: return(0);
! 498: if ((p->args = args))
1.53 kristaps 499: (args->refcnt)++;
1.73 ! kristaps 500: return(node_append(mdoc, p));
1.1 kristaps 501: }
502:
503:
1.23 kristaps 504: int
1.22 kristaps 505: mdoc_word_alloc(struct mdoc *mdoc,
506: int line, int pos, const char *word)
1.1 kristaps 507: {
508: struct mdoc_node *p;
509:
1.73 ! kristaps 510: p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
! 511: if (NULL == p)
! 512: return(0);
! 513: if (NULL == (p->string = strdup(word))) {
! 514: (void)verr(mdoc, EMALLOC);
! 515: return(0);
! 516: }
! 517: return(node_append(mdoc, p));
1.1 kristaps 518: }
519:
520:
1.53 kristaps 521: void
522: mdoc_node_free(struct mdoc_node *p)
1.1 kristaps 523: {
524:
1.53 kristaps 525: if (p->string)
526: free(p->string);
527: if (p->args)
528: mdoc_argv_free(p->args);
1.1 kristaps 529: free(p);
530: }
531:
532:
1.53 kristaps 533: void
534: mdoc_node_freelist(struct mdoc_node *p)
1.1 kristaps 535: {
536:
1.53 kristaps 537: if (p->child)
538: mdoc_node_freelist(p->child);
539: if (p->next)
540: mdoc_node_freelist(p->next);
1.1 kristaps 541:
1.53 kristaps 542: mdoc_node_free(p);
1.1 kristaps 543: }
544:
545:
1.53 kristaps 546: /*
547: * Parse free-form text, that is, a line that does not begin with the
548: * control character.
549: */
550: static int
1.68 kristaps 551: parsetext(struct mdoc *m, int line, char *buf)
1.1 kristaps 552: {
553:
1.68 kristaps 554: if (SEC_PROLOGUE == m->lastnamed)
1.73 ! kristaps 555: return(perr(m, line, 0, ETEXTPROL));
1.1 kristaps 556:
1.68 kristaps 557: if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
1.73 ! kristaps 558: return(perr(m, line, 0, ENOBLANK));
1.68 kristaps 559:
560: if ( ! mdoc_word_alloc(m, line, 0, buf))
1.53 kristaps 561: return(0);
1.1 kristaps 562:
1.68 kristaps 563: m->next = MDOC_NEXT_SIBLING;
1.53 kristaps 564: return(1);
1.1 kristaps 565: }
566:
567:
1.58 kristaps 568: static int
569: macrowarn(struct mdoc *m, int ln, const char *buf)
570: {
571: if ( ! (MDOC_IGN_MACRO & m->pflags))
1.73 ! kristaps 572: return(mdoc_perr(m, ln, 1,
! 573: "unknown macro: %s%s",
1.59 kristaps 574: buf, strlen(buf) > 3 ? "..." : ""));
1.58 kristaps 575: return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
576: "unknown macro: %s%s",
1.59 kristaps 577: buf, strlen(buf) > 3 ? "..." : ""));
1.58 kristaps 578: }
579:
580:
581:
1.53 kristaps 582: /*
583: * Parse a macro line, that is, a line beginning with the control
584: * character.
585: */
586: int
587: parsemacro(struct mdoc *m, int ln, char *buf)
1.1 kristaps 588: {
1.53 kristaps 589: int i, c;
590: char mac[5];
1.1 kristaps 591:
1.63 kristaps 592: /* Comments and empties are quickly ignored. */
593:
594: if (0 == buf[1])
595: return(1);
596:
1.65 kristaps 597: if (' ' == buf[1]) {
1.63 kristaps 598: i = 2;
1.65 kristaps 599: while (buf[i] && ' ' == buf[i])
1.63 kristaps 600: i++;
601: if (0 == buf[i])
602: return(1);
1.73 ! kristaps 603: return(perr(m, ln, 1, ESPACE));
1.63 kristaps 604: }
1.1 kristaps 605:
1.53 kristaps 606: if (buf[1] && '\\' == buf[1])
607: if (buf[2] && '\"' == buf[2])
608: return(1);
1.1 kristaps 609:
1.53 kristaps 610: /* Copy the first word into a nil-terminated buffer. */
1.1 kristaps 611:
1.53 kristaps 612: for (i = 1; i < 5; i++) {
613: if (0 == (mac[i - 1] = buf[i]))
614: break;
1.65 kristaps 615: else if (' ' == buf[i])
1.53 kristaps 616: break;
617: }
1.1 kristaps 618:
1.53 kristaps 619: mac[i - 1] = 0;
1.1 kristaps 620:
1.53 kristaps 621: if (i == 5 || i <= 2) {
1.58 kristaps 622: if ( ! macrowarn(m, ln, mac))
623: goto err;
624: return(1);
1.53 kristaps 625: }
626:
627: if (MDOC_MAX == (c = mdoc_tokhash_find(m->htab, mac))) {
1.58 kristaps 628: if ( ! macrowarn(m, ln, mac))
629: goto err;
630: return(1);
1.53 kristaps 631: }
1.1 kristaps 632:
1.53 kristaps 633: /* The macro is sane. Jump to the next word. */
1.1 kristaps 634:
1.65 kristaps 635: while (buf[i] && ' ' == buf[i])
1.53 kristaps 636: i++;
1.1 kristaps 637:
1.53 kristaps 638: /* Begin recursive parse sequence. */
1.1 kristaps 639:
1.53 kristaps 640: if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
641: goto err;
1.1 kristaps 642:
1.53 kristaps 643: return(1);
1.1 kristaps 644:
1.53 kristaps 645: err: /* Error out. */
1.1 kristaps 646:
1.53 kristaps 647: m->flags |= MDOC_HALT;
648: return(0);
1.1 kristaps 649: }
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