Annotation of src/usr.bin/mandoc/mdoc.c, Revision 1.34
1.34 ! schwarze 1: /* $Id: mdoc.c,v 1.33 2010/01/02 02:42:06 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: */
1.28 schwarze 17: #include <sys/types.h>
18:
1.1 kristaps 19: #include <assert.h>
20: #include <ctype.h>
21: #include <stdarg.h>
22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25:
26: #include "libmdoc.h"
1.32 schwarze 27: #include "libmandoc.h"
1.1 kristaps 28:
1.14 schwarze 29: const char *const __mdoc_merrnames[MERRMAX] = {
30: "trailing whitespace", /* ETAILWS */
31: "unexpected quoted parameter", /* EQUOTPARM */
32: "unterminated quoted parameter", /* EQUOTTERM */
33: "argument parameter suggested", /* EARGVAL */
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: "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 */
1.29 schwarze 79: "no description found for library", /* ELIB */
80: "bad child for parent context", /* EBADCHILD */
1.30 schwarze 81: "list arguments preceding type", /* ENOTYPE */
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 */
1.33 schwarze 96: "Xr", "%A", "%B", "%D",
1.1 kristaps 97: /* LINTED */
1.33 schwarze 98: "%I", "%J", "%N", "%O",
1.1 kristaps 99: /* LINTED */
1.33 schwarze 100: "%P", "%R", "%T", "%V",
1.1 kristaps 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 */
1.33 schwarze 117: "Brc", "%C", "Es", "En",
1.1 kristaps 118: /* LINTED */
1.33 schwarze 119: "Dx", "%Q", "br", "sp",
1.31 schwarze 120: /* LINTED */
1.33 schwarze 121: "%U"
1.1 kristaps 122: };
123:
124: const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
125: "split", "nosplit", "ragged",
126: "unfilled", "literal", "file",
127: "offset", "bullet", "dash",
128: "hyphen", "item", "enum",
129: "tag", "diag", "hang",
130: "ohang", "inset", "column",
131: "width", "compact", "std",
132: "filled", "words", "emphasis",
1.30 schwarze 133: "symbolic", "nested", "centered"
1.1 kristaps 134: };
135:
136: const char * const *mdoc_macronames = __mdoc_macronames;
137: const char * const *mdoc_argnames = __mdoc_argnames;
138:
139: static void mdoc_free1(struct mdoc *);
1.32 schwarze 140: static void mdoc_alloc1(struct mdoc *);
1.1 kristaps 141: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
142: int, enum mdoc_type);
143: static int node_append(struct mdoc *,
144: struct mdoc_node *);
145: static int parsetext(struct mdoc *, int, char *);
146: static int parsemacro(struct mdoc *, int, char *);
147: static int macrowarn(struct mdoc *, int, const char *);
1.19 schwarze 148: static int pstring(struct mdoc *, int, int,
149: const char *, size_t);
1.1 kristaps 150:
151: const struct mdoc_node *
152: mdoc_node(const struct mdoc *m)
153: {
154:
155: return(MDOC_HALT & m->flags ? NULL : m->first);
156: }
157:
158:
159: const struct mdoc_meta *
160: mdoc_meta(const struct mdoc *m)
161: {
162:
163: return(MDOC_HALT & m->flags ? NULL : &m->meta);
164: }
165:
166:
1.8 schwarze 167: /*
168: * Frees volatile resources (parse tree, meta-data, fields).
169: */
1.1 kristaps 170: static void
171: mdoc_free1(struct mdoc *mdoc)
172: {
173:
174: if (mdoc->first)
175: mdoc_node_freelist(mdoc->first);
176: if (mdoc->meta.title)
177: free(mdoc->meta.title);
178: if (mdoc->meta.os)
179: free(mdoc->meta.os);
180: if (mdoc->meta.name)
181: free(mdoc->meta.name);
182: if (mdoc->meta.arch)
183: free(mdoc->meta.arch);
184: if (mdoc->meta.vol)
185: free(mdoc->meta.vol);
186: }
187:
188:
1.8 schwarze 189: /*
190: * Allocate all volatile resources (parse tree, meta-data, fields).
191: */
1.32 schwarze 192: static void
1.1 kristaps 193: mdoc_alloc1(struct mdoc *mdoc)
194: {
195:
1.32 schwarze 196: memset(&mdoc->meta, 0, sizeof(struct mdoc_meta));
1.1 kristaps 197: mdoc->flags = 0;
1.9 schwarze 198: mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.32 schwarze 199: mdoc->last = mandoc_calloc(1, sizeof(struct mdoc_node));
1.1 kristaps 200: mdoc->first = mdoc->last;
201: mdoc->last->type = MDOC_ROOT;
202: mdoc->next = MDOC_NEXT_CHILD;
203: }
204:
205:
206: /*
1.8 schwarze 207: * Free up volatile resources (see mdoc_free1()) then re-initialises the
208: * data with mdoc_alloc1(). After invocation, parse data has been reset
209: * and the parser is ready for re-invocation on a new tree; however,
210: * cross-parse non-volatile data is kept intact.
1.1 kristaps 211: */
1.32 schwarze 212: void
1.1 kristaps 213: mdoc_reset(struct mdoc *mdoc)
214: {
215:
216: mdoc_free1(mdoc);
1.32 schwarze 217: mdoc_alloc1(mdoc);
1.1 kristaps 218: }
219:
220:
221: /*
1.8 schwarze 222: * Completely free up all volatile and non-volatile parse resources.
223: * After invocation, the pointer is no longer usable.
1.1 kristaps 224: */
225: void
226: mdoc_free(struct mdoc *mdoc)
227: {
228:
229: mdoc_free1(mdoc);
230: free(mdoc);
231: }
232:
233:
1.8 schwarze 234: /*
235: * Allocate volatile and non-volatile parse resources.
236: */
1.1 kristaps 237: struct mdoc *
238: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
239: {
240: struct mdoc *p;
241:
1.32 schwarze 242: p = mandoc_calloc(1, sizeof(struct mdoc));
243:
1.1 kristaps 244: if (cb)
1.32 schwarze 245: memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.27 schwarze 246:
1.1 kristaps 247: p->data = data;
248: p->pflags = pflags;
249:
1.32 schwarze 250: mdoc_hash_init();
251: mdoc_alloc1(p);
252: return(p);
1.1 kristaps 253: }
254:
255:
256: /*
257: * Climb back up the parse tree, validating open scopes. Mostly calls
1.8 schwarze 258: * through to macro_end() in macro.c.
1.1 kristaps 259: */
260: int
261: mdoc_endparse(struct mdoc *m)
262: {
263:
264: if (MDOC_HALT & m->flags)
265: return(0);
266: else if (mdoc_macroend(m))
267: return(1);
268: m->flags |= MDOC_HALT;
269: return(0);
270: }
271:
272:
273: /*
274: * Main parse routine. Parses a single line -- really just hands off to
1.8 schwarze 275: * the macro (parsemacro()) or text parser (parsetext()).
1.1 kristaps 276: */
277: int
278: mdoc_parseln(struct mdoc *m, int ln, char *buf)
279: {
280:
281: if (MDOC_HALT & m->flags)
282: return(0);
283:
284: return('.' == *buf ? parsemacro(m, ln, buf) :
285: parsetext(m, ln, buf));
286: }
287:
288:
289: int
1.4 schwarze 290: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
291: const char *fmt, ...)
1.1 kristaps 292: {
293: char buf[256];
294: va_list ap;
295:
296: if (NULL == mdoc->cb.mdoc_err)
297: return(0);
298:
299: va_start(ap, fmt);
300: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
301: va_end(ap);
1.12 schwarze 302:
1.1 kristaps 303: return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
304: }
305:
306:
307: int
1.12 schwarze 308: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1 kristaps 309: {
310: char buf[256];
311: va_list ap;
312:
313: if (NULL == mdoc->cb.mdoc_warn)
314: return(0);
315:
316: va_start(ap, fmt);
317: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
318: va_end(ap);
1.17 schwarze 319:
1.11 schwarze 320: return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, buf));
1.5 schwarze 321: }
322:
323:
324: int
1.14 schwarze 325: mdoc_err(struct mdoc *m, int line, int pos, int iserr, enum merr type)
1.5 schwarze 326: {
1.14 schwarze 327: const char *p;
1.5 schwarze 328:
1.14 schwarze 329: p = __mdoc_merrnames[(int)type];
330: assert(p);
1.5 schwarze 331:
1.14 schwarze 332: if (iserr)
333: return(mdoc_verr(m, line, pos, p));
1.16 schwarze 334:
1.14 schwarze 335: return(mdoc_vwarn(m, line, pos, p));
1.5 schwarze 336: }
337:
338:
339: int
1.1 kristaps 340: mdoc_macro(struct mdoc *m, int tok,
341: int ln, int pp, int *pos, char *buf)
342: {
1.24 schwarze 343: /*
344: * If we're in the prologue, deny "body" macros. Similarly, if
345: * we're in the body, deny prologue calls.
346: */
1.1 kristaps 347: if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.9 schwarze 348: MDOC_PBODY & m->flags)
1.16 schwarze 349: return(mdoc_perr(m, ln, pp, EPROLBODY));
1.1 kristaps 350: if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.9 schwarze 351: ! (MDOC_PBODY & m->flags))
1.16 schwarze 352: return(mdoc_perr(m, ln, pp, EBODYPROL));
1.1 kristaps 353:
354: return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
355: }
356:
357:
358: static int
359: node_append(struct mdoc *mdoc, struct mdoc_node *p)
360: {
361:
362: assert(mdoc->last);
363: assert(mdoc->first);
364: assert(MDOC_ROOT != p->type);
365:
366: switch (mdoc->next) {
367: case (MDOC_NEXT_SIBLING):
368: mdoc->last->next = p;
369: p->prev = mdoc->last;
370: p->parent = mdoc->last->parent;
371: break;
372: case (MDOC_NEXT_CHILD):
373: mdoc->last->child = p;
374: p->parent = mdoc->last;
375: break;
376: default:
377: abort();
378: /* NOTREACHED */
379: }
380:
1.10 schwarze 381: p->parent->nchild++;
382:
1.1 kristaps 383: if ( ! mdoc_valid_pre(mdoc, p))
384: return(0);
385: if ( ! mdoc_action_pre(mdoc, p))
386: return(0);
387:
388: switch (p->type) {
389: case (MDOC_HEAD):
390: assert(MDOC_BLOCK == p->parent->type);
391: p->parent->head = p;
392: break;
393: case (MDOC_TAIL):
394: assert(MDOC_BLOCK == p->parent->type);
395: p->parent->tail = p;
396: break;
397: case (MDOC_BODY):
398: assert(MDOC_BLOCK == p->parent->type);
399: p->parent->body = p;
400: break;
401: default:
402: break;
403: }
404:
405: mdoc->last = p;
406:
407: switch (p->type) {
408: case (MDOC_TEXT):
409: if ( ! mdoc_valid_post(mdoc))
410: return(0);
411: if ( ! mdoc_action_post(mdoc))
412: return(0);
413: break;
414: default:
415: break;
416: }
417:
418: return(1);
419: }
420:
421:
422: static struct mdoc_node *
1.19 schwarze 423: node_alloc(struct mdoc *m, int line,
1.1 kristaps 424: int pos, int tok, enum mdoc_type type)
425: {
426: struct mdoc_node *p;
427:
1.32 schwarze 428: p = mandoc_calloc(1, sizeof(struct mdoc_node));
1.19 schwarze 429: p->sec = m->lastsec;
1.1 kristaps 430: p->line = line;
431: p->pos = pos;
432: p->tok = tok;
433: if (MDOC_TEXT != (p->type = type))
434: assert(p->tok >= 0);
435:
436: return(p);
437: }
438:
439:
440: int
1.19 schwarze 441: mdoc_tail_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 442: {
443: struct mdoc_node *p;
444:
1.19 schwarze 445: p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.25 schwarze 446: if ( ! node_append(m, p))
447: return(0);
448: m->next = MDOC_NEXT_CHILD;
449: return(1);
1.1 kristaps 450: }
451:
452:
453: int
1.19 schwarze 454: mdoc_head_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 455: {
456: struct mdoc_node *p;
457:
1.19 schwarze 458: assert(m->first);
459: assert(m->last);
1.1 kristaps 460:
1.19 schwarze 461: p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.25 schwarze 462: if ( ! node_append(m, p))
463: return(0);
464: m->next = MDOC_NEXT_CHILD;
465: return(1);
1.1 kristaps 466: }
467:
468:
469: int
1.19 schwarze 470: mdoc_body_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 471: {
472: struct mdoc_node *p;
473:
1.19 schwarze 474: p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.25 schwarze 475: if ( ! node_append(m, p))
476: return(0);
477: m->next = MDOC_NEXT_CHILD;
478: return(1);
1.1 kristaps 479: }
480:
481:
482: int
1.19 schwarze 483: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.1 kristaps 484: int tok, struct mdoc_arg *args)
485: {
486: struct mdoc_node *p;
487:
1.19 schwarze 488: p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.4 schwarze 489: p->args = args;
490: if (p->args)
1.1 kristaps 491: (args->refcnt)++;
1.25 schwarze 492: if ( ! node_append(m, p))
493: return(0);
494: m->next = MDOC_NEXT_CHILD;
495: return(1);
1.1 kristaps 496: }
497:
498:
499: int
1.19 schwarze 500: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.1 kristaps 501: int tok, struct mdoc_arg *args)
502: {
503: struct mdoc_node *p;
504:
1.19 schwarze 505: p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.4 schwarze 506: p->args = args;
507: if (p->args)
1.1 kristaps 508: (args->refcnt)++;
1.25 schwarze 509: if ( ! node_append(m, p))
510: return(0);
511: m->next = MDOC_NEXT_CHILD;
512: return(1);
1.1 kristaps 513: }
514:
515:
1.19 schwarze 516: static int
517: pstring(struct mdoc *m, int line, int pos, const char *p, size_t len)
1.1 kristaps 518: {
1.19 schwarze 519: struct mdoc_node *n;
520: size_t sv;
1.1 kristaps 521:
1.19 schwarze 522: n = node_alloc(m, line, pos, -1, MDOC_TEXT);
1.32 schwarze 523: n->string = mandoc_malloc(len + 1);
1.19 schwarze 524: sv = strlcpy(n->string, p, len + 1);
525:
526: /* Prohibit truncation. */
527: assert(sv < len + 1);
528:
1.25 schwarze 529: if ( ! node_append(m, n))
530: return(0);
531: m->next = MDOC_NEXT_SIBLING;
532: return(1);
1.19 schwarze 533: }
534:
535:
536: int
537: mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
538: {
539:
540: return(pstring(m, line, pos, p, strlen(p)));
1.1 kristaps 541: }
542:
543:
544: void
545: mdoc_node_free(struct mdoc_node *p)
546: {
547:
1.10 schwarze 548: if (p->parent)
549: p->parent->nchild--;
1.1 kristaps 550: if (p->string)
551: free(p->string);
552: if (p->args)
553: mdoc_argv_free(p->args);
554: free(p);
555: }
556:
557:
558: void
559: mdoc_node_freelist(struct mdoc_node *p)
560: {
561:
562: if (p->child)
563: mdoc_node_freelist(p->child);
564: if (p->next)
565: mdoc_node_freelist(p->next);
566:
1.10 schwarze 567: assert(0 == p->nchild);
1.1 kristaps 568: mdoc_node_free(p);
569: }
570:
571:
572: /*
573: * Parse free-form text, that is, a line that does not begin with the
574: * control character.
575: */
576: static int
577: parsetext(struct mdoc *m, int line, char *buf)
578: {
1.19 schwarze 579: int i, j;
1.34 ! schwarze 580: char sv;
1.1 kristaps 581:
1.9 schwarze 582: if (SEC_NONE == m->lastnamed)
1.16 schwarze 583: return(mdoc_perr(m, line, 0, ETEXTPROL));
1.19 schwarze 584:
585: /*
586: * If in literal mode, then pass the buffer directly to the
587: * back-end, as it should be preserved as a single term.
588: */
1.1 kristaps 589:
1.25 schwarze 590: if (MDOC_LITERAL & m->flags)
591: return(mdoc_word_alloc(m, line, 0, buf));
1.19 schwarze 592:
593: /* Disallow blank/white-space lines in non-literal mode. */
594:
595: for (i = 0; ' ' == buf[i]; i++)
596: /* Skip leading whitespace. */ ;
1.34 ! schwarze 597:
! 598: if ('\0' == buf[i])
1.16 schwarze 599: return(mdoc_perr(m, line, 0, ENOBLANK));
1.1 kristaps 600:
1.19 schwarze 601: /*
602: * Break apart a free-form line into tokens. Spaces are
603: * stripped out of the input.
604: */
605:
606: for (j = i; buf[i]; i++) {
607: if (' ' != buf[i])
608: continue;
609:
610: /* Escaped whitespace. */
611: if (i && ' ' == buf[i] && '\\' == buf[i - 1])
612: continue;
613:
1.34 ! schwarze 614: sv = buf[i];
! 615: buf[i++] = '\0';
! 616:
1.19 schwarze 617: if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
618: return(0);
619:
1.34 ! schwarze 620: /* Trailing whitespace? Check at overwritten byte. */
! 621:
! 622: if (' ' == sv && '\0' == buf[i])
! 623: if ( ! mdoc_pwarn(m, line, i - 1, ETAILWS))
! 624: return(0);
! 625:
1.19 schwarze 626: for ( ; ' ' == buf[i]; i++)
627: /* Skip trailing whitespace. */ ;
628:
629: j = i;
1.34 ! schwarze 630:
! 631: /* Trailing whitespace? */
! 632:
! 633: if (' ' == buf[i - 1] && '\0' == buf[i])
! 634: if ( ! mdoc_pwarn(m, line, i - 1, ETAILWS))
! 635: return(0);
! 636:
! 637: if ('\0' == buf[i])
1.19 schwarze 638: break;
639: }
640:
641: if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.1 kristaps 642: return(0);
643:
644: m->next = MDOC_NEXT_SIBLING;
645: return(1);
646: }
1.19 schwarze 647:
1.1 kristaps 648:
649:
650: static int
651: macrowarn(struct mdoc *m, int ln, const char *buf)
652: {
653: if ( ! (MDOC_IGN_MACRO & m->pflags))
1.23 schwarze 654: return(mdoc_verr(m, ln, 0,
1.1 kristaps 655: "unknown macro: %s%s",
656: buf, strlen(buf) > 3 ? "..." : ""));
1.23 schwarze 657: return(mdoc_vwarn(m, ln, 0, "unknown macro: %s%s",
1.1 kristaps 658: buf, strlen(buf) > 3 ? "..." : ""));
659: }
660:
661:
662: /*
663: * Parse a macro line, that is, a line beginning with the control
664: * character.
665: */
666: int
667: parsemacro(struct mdoc *m, int ln, char *buf)
668: {
1.25 schwarze 669: int i, j, c;
1.1 kristaps 670: char mac[5];
671:
1.7 schwarze 672: /* Empty lines are ignored. */
1.1 kristaps 673:
1.34 ! schwarze 674: if ('\0' == buf[1])
1.1 kristaps 675: return(1);
676:
1.24 schwarze 677: i = 1;
678:
679: /* Accept whitespace after the initial control char. */
680:
681: if (' ' == buf[i]) {
682: i++;
1.1 kristaps 683: while (buf[i] && ' ' == buf[i])
684: i++;
1.34 ! schwarze 685: if ('\0' == buf[i])
1.1 kristaps 686: return(1);
687: }
688:
689: /* Copy the first word into a nil-terminated buffer. */
690:
1.24 schwarze 691: for (j = 0; j < 4; j++, i++) {
1.34 ! schwarze 692: if ('\0' == (mac[j] = buf[i]))
1.1 kristaps 693: break;
694: else if (' ' == buf[i])
695: break;
1.26 schwarze 696:
697: /* Check for invalid characters. */
698:
699: if (isgraph((u_char)buf[i]))
700: continue;
701: return(mdoc_perr(m, ln, i, EPRINT));
1.1 kristaps 702: }
703:
1.24 schwarze 704: mac[j] = 0;
1.1 kristaps 705:
1.24 schwarze 706: if (j == 4 || j < 2) {
1.1 kristaps 707: if ( ! macrowarn(m, ln, mac))
708: goto err;
709: return(1);
710: }
711:
1.27 schwarze 712: if (MDOC_MAX == (c = mdoc_hash_find(mac))) {
1.1 kristaps 713: if ( ! macrowarn(m, ln, mac))
714: goto err;
715: return(1);
716: }
717:
718: /* The macro is sane. Jump to the next word. */
719:
720: while (buf[i] && ' ' == buf[i])
721: i++;
1.34 ! schwarze 722:
! 723: /* Trailing whitespace? */
! 724:
! 725: if ('\0' == buf[i] && ' ' == buf[i - 1])
! 726: if ( ! mdoc_pwarn(m, ln, i - 1, ETAILWS))
! 727: goto err;
1.1 kristaps 728:
1.24 schwarze 729: /*
730: * Begin recursive parse sequence. Since we're at the start of
731: * the line, we don't need to do callable/parseable checks.
732: */
1.25 schwarze 733: if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
1.1 kristaps 734: goto err;
735:
736: return(1);
737:
738: err: /* Error out. */
739:
740: m->flags |= MDOC_HALT;
741: return(0);
742: }
1.24 schwarze 743:
744:
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