Annotation of mandoc/mdoc.c, Revision 1.100
1.100 ! kristaps 1: /* $Id: mdoc.c,v 1.99 2009/08/13 11:43:24 kristaps Exp $ */
1.1 kristaps 2: /*
1.76 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
1.75 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: *
1.75 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>
1.73 kristaps 20: #include <stdio.h>
1.1 kristaps 21: #include <stdlib.h>
22: #include <string.h>
23:
1.70 kristaps 24: #include "libmdoc.h"
1.1 kristaps 25:
1.89 kristaps 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 disallowed in prologue", /* EBODYPROL */
33: "macro disallowed in body", /* EPROLBODY */
34: "text disallowed in prologue", /* ETEXTPROL */
35: "blank line disallowed", /* ENOBLANK */
36: "text parameter too long", /* ETOOLONG */
37: "invalid escape sequence", /* EESCAPE */
38: "invalid character", /* EPRINT */
39: "document has no body", /* ENODAT */
40: "document has no prologue", /* ENOPROLOGUE */
41: "expected line arguments", /* ELINE */
42: "invalid AT&T argument", /* EATT */
43: "default name not yet set", /* ENAME */
44: "missing list type", /* ELISTTYPE */
45: "missing display type", /* EDISPTYPE */
46: "too many display types", /* EMULTIDISP */
47: "too many list types", /* EMULTILIST */
48: "NAME section must be first", /* ESECNAME */
49: "badly-formed NAME section", /* ENAMESECINC */
50: "argument repeated", /* EARGREP */
51: "expected boolean parameter", /* EBOOL */
52: "inconsistent column syntax", /* ECOLMIS */
53: "nested display invalid", /* ENESTDISP */
54: "width argument missing", /* EMISSWIDTH */
55: "invalid section for this manual section", /* EWRONGMSEC */
56: "section out of conventional order", /* ESECOOO */
57: "section repeated", /* ESECREP */
58: "invalid standard argument", /* EBADSTAND */
59: "multi-line arguments discouraged", /* ENOMULTILINE */
60: "multi-line arguments suggested", /* EMULTILINE */
61: "line arguments discouraged", /* ENOLINE */
62: "prologue macro out of conventional order", /* EPROLOOO */
63: "prologue macro repeated", /* EPROLREP */
64: "invalid manual section", /* EBADMSEC */
65: "invalid section", /* EBADSEC */
66: "invalid font mode", /* EFONT */
67: "invalid date syntax", /* EBADDATE */
68: "invalid number format", /* ENUMFMT */
69: "superfluous width argument", /* ENOWIDTH */
70: "system: utsname error", /* EUTSNAME */
71: "obsolete macro", /* EOBS */
72: "end-of-line scope violation", /* EIMPBRK */
73: "empty macro ignored", /* EIGNE */
74: "unclosed explicit scope", /* EOPEN */
75: "unterminated quoted phrase", /* EQUOTPHR */
76: "closure macro without prior context", /* ENOCTX */
1.90 kristaps 77: "no description found for library" /* ELIB */
1.89 kristaps 78: };
79:
1.1 kristaps 80: const char *const __mdoc_macronames[MDOC_MAX] = {
1.82 kristaps 81: "Ap", "Dd", "Dt", "Os",
1.1 kristaps 82: "Sh", "Ss", "Pp", "D1",
83: "Dl", "Bd", "Ed", "Bl",
84: "El", "It", "Ad", "An",
85: "Ar", "Cd", "Cm", "Dv",
86: "Er", "Ev", "Ex", "Fa",
87: "Fd", "Fl", "Fn", "Ft",
88: "Ic", "In", "Li", "Nd",
89: "Nm", "Op", "Ot", "Pa",
90: "Rv", "St", "Va", "Vt",
91: /* LINTED */
92: "Xr", "\%A", "\%B", "\%D",
93: /* LINTED */
94: "\%I", "\%J", "\%N", "\%O",
95: /* LINTED */
96: "\%P", "\%R", "\%T", "\%V",
97: "Ac", "Ao", "Aq", "At",
98: "Bc", "Bf", "Bo", "Bq",
99: "Bsx", "Bx", "Db", "Dc",
100: "Do", "Dq", "Ec", "Ef",
101: "Em", "Eo", "Fx", "Ms",
102: "No", "Ns", "Nx", "Ox",
103: "Pc", "Pf", "Po", "Pq",
104: "Qc", "Ql", "Qo", "Qq",
105: "Re", "Rs", "Sc", "So",
106: "Sq", "Sm", "Sx", "Sy",
107: "Tn", "Ux", "Xc", "Xo",
108: "Fo", "Fc", "Oo", "Oc",
109: "Bk", "Ek", "Bt", "Hf",
1.82 kristaps 110: "Fr", "Ud", "Lb", "Lp",
111: "Lk", "Mt", "Brq", "Bro",
1.64 kristaps 112: /* LINTED */
1.82 kristaps 113: "Brc", "\%C", "Es", "En",
1.69 kristaps 114: /* LINTED */
1.93 kristaps 115: "Dx", "\%Q", "br", "sp"
1.1 kristaps 116: };
117:
118: const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
119: "split", "nosplit", "ragged",
120: "unfilled", "literal", "file",
121: "offset", "bullet", "dash",
122: "hyphen", "item", "enum",
123: "tag", "diag", "hang",
124: "ohang", "inset", "column",
125: "width", "compact", "std",
1.52 kristaps 126: "filled", "words", "emphasis",
1.64 kristaps 127: "symbolic", "nested"
1.1 kristaps 128: };
129:
130: const char * const *mdoc_macronames = __mdoc_macronames;
131: const char * const *mdoc_argnames = __mdoc_argnames;
132:
1.73 kristaps 133: static void mdoc_free1(struct mdoc *);
134: static int mdoc_alloc1(struct mdoc *);
135: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
136: int, enum mdoc_type);
137: static int node_append(struct mdoc *,
1.71 kristaps 138: struct mdoc_node *);
139: static int parsetext(struct mdoc *, int, char *);
140: static int parsemacro(struct mdoc *, int, char *);
141: static int macrowarn(struct mdoc *, int, const char *);
1.91 kristaps 142: static int pstring(struct mdoc *, int, int,
143: const char *, size_t);
1.88 kristaps 144:
1.92 kristaps 145: #ifdef __linux__
146: extern size_t strlcpy(char *, const char *, size_t);
147: #endif
148:
1.71 kristaps 149:
1.1 kristaps 150: const struct mdoc_node *
1.71 kristaps 151: mdoc_node(const struct mdoc *m)
1.1 kristaps 152: {
153:
1.71 kristaps 154: return(MDOC_HALT & m->flags ? NULL : m->first);
1.1 kristaps 155: }
156:
157:
1.37 kristaps 158: const struct mdoc_meta *
1.71 kristaps 159: mdoc_meta(const struct mdoc *m)
1.37 kristaps 160: {
161:
1.71 kristaps 162: return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37 kristaps 163: }
164:
165:
1.85 kristaps 166: /*
167: * Frees volatile resources (parse tree, meta-data, fields).
168: */
1.73 kristaps 169: static void
170: mdoc_free1(struct mdoc *mdoc)
1.67 kristaps 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);
1.73 kristaps 185: }
186:
187:
1.85 kristaps 188: /*
189: * Allocate all volatile resources (parse tree, meta-data, fields).
190: */
1.73 kristaps 191: static int
192: mdoc_alloc1(struct mdoc *mdoc)
193: {
1.67 kristaps 194:
195: bzero(&mdoc->meta, sizeof(struct mdoc_meta));
196: mdoc->flags = 0;
1.85 kristaps 197: mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.70 kristaps 198: mdoc->last = calloc(1, sizeof(struct mdoc_node));
199: if (NULL == mdoc->last)
1.73 kristaps 200: return(0);
201:
1.70 kristaps 202: mdoc->first = mdoc->last;
1.67 kristaps 203: mdoc->last->type = MDOC_ROOT;
204: mdoc->next = MDOC_NEXT_CHILD;
1.73 kristaps 205: return(1);
206: }
207:
208:
209: /*
1.85 kristaps 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.
1.73 kristaps 214: */
215: int
216: mdoc_reset(struct mdoc *mdoc)
217: {
218:
219: mdoc_free1(mdoc);
220: return(mdoc_alloc1(mdoc));
1.67 kristaps 221: }
222:
223:
1.68 kristaps 224: /*
1.85 kristaps 225: * Completely free up all volatile and non-volatile parse resources.
226: * After invocation, the pointer is no longer usable.
1.68 kristaps 227: */
1.67 kristaps 228: void
1.38 kristaps 229: mdoc_free(struct mdoc *mdoc)
1.34 kristaps 230: {
231:
1.73 kristaps 232: mdoc_free1(mdoc);
1.68 kristaps 233: if (mdoc->htab)
1.74 kristaps 234: mdoc_hash_free(mdoc->htab);
1.1 kristaps 235: free(mdoc);
236: }
237:
238:
1.85 kristaps 239: /*
240: * Allocate volatile and non-volatile parse resources.
241: */
1.1 kristaps 242: struct mdoc *
1.55 kristaps 243: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1 kristaps 244: {
245: struct mdoc *p;
246:
1.70 kristaps 247: if (NULL == (p = calloc(1, sizeof(struct mdoc))))
1.73 kristaps 248: return(NULL);
1.74 kristaps 249: if (cb)
250: (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1 kristaps 251:
252: p->data = data;
1.73 kristaps 253: p->pflags = pflags;
254:
1.74 kristaps 255: if (NULL == (p->htab = mdoc_hash_alloc())) {
256: free(p);
257: return(NULL);
258: } else if (mdoc_alloc1(p))
259: return(p);
1.1 kristaps 260:
1.73 kristaps 261: free(p);
262: return(NULL);
1.1 kristaps 263: }
264:
265:
1.68 kristaps 266: /*
267: * Climb back up the parse tree, validating open scopes. Mostly calls
1.85 kristaps 268: * through to macro_end() in macro.c.
1.68 kristaps 269: */
1.1 kristaps 270: int
1.72 kristaps 271: mdoc_endparse(struct mdoc *m)
1.20 kristaps 272: {
273:
1.72 kristaps 274: if (MDOC_HALT & m->flags)
1.20 kristaps 275: return(0);
1.72 kristaps 276: else if (mdoc_macroend(m))
1.20 kristaps 277: return(1);
1.72 kristaps 278: m->flags |= MDOC_HALT;
279: return(0);
1.20 kristaps 280: }
281:
282:
1.50 kristaps 283: /*
1.53 kristaps 284: * Main parse routine. Parses a single line -- really just hands off to
1.85 kristaps 285: * the macro (parsemacro()) or text parser (parsetext()).
1.50 kristaps 286: */
1.20 kristaps 287: int
1.53 kristaps 288: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1 kristaps 289: {
290:
1.53 kristaps 291: if (MDOC_HALT & m->flags)
1.20 kristaps 292: return(0);
1.50 kristaps 293:
1.53 kristaps 294: return('.' == *buf ? parsemacro(m, ln, buf) :
295: parsetext(m, ln, buf));
1.1 kristaps 296: }
297:
298:
299: int
1.31 kristaps 300: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
301: const char *fmt, ...)
1.1 kristaps 302: {
1.31 kristaps 303: char buf[256];
304: va_list ap;
1.1 kristaps 305:
306: if (NULL == mdoc->cb.mdoc_err)
307: return(0);
1.31 kristaps 308:
309: va_start(ap, fmt);
310: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
311: va_end(ap);
1.88 kristaps 312:
1.31 kristaps 313: return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1 kristaps 314: }
315:
316:
317: int
1.87 kristaps 318: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1 kristaps 319: {
1.31 kristaps 320: char buf[256];
321: va_list ap;
1.1 kristaps 322:
323: if (NULL == mdoc->cb.mdoc_warn)
324: return(0);
1.31 kristaps 325:
326: va_start(ap, fmt);
327: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
328: va_end(ap);
1.88 kristaps 329:
1.87 kristaps 330: return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, buf));
1.1 kristaps 331: }
332:
333:
334: int
1.88 kristaps 335: mdoc_err(struct mdoc *m, int line, int pos, int iserr, enum merr type)
1.78 kristaps 336: {
1.89 kristaps 337: const char *p;
1.88 kristaps 338:
1.89 kristaps 339: p = __mdoc_merrnames[(int)type];
1.73 kristaps 340: assert(p);
1.88 kristaps 341:
342: if (iserr)
343: return(mdoc_verr(m, line, pos, p));
344:
345: return(mdoc_vwarn(m, line, pos, p));
346: }
347:
348:
349: int
350: mdoc_macro(struct mdoc *m, int tok,
351: int ln, int pp, int *pos, char *buf)
352: {
1.97 kristaps 353: /*
354: * If we're in the prologue, deny "body" macros. Similarly, if
355: * we're in the body, deny prologue calls.
356: */
1.88 kristaps 357: if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
358: MDOC_PBODY & m->flags)
359: return(mdoc_perr(m, ln, pp, EPROLBODY));
360: if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
361: ! (MDOC_PBODY & m->flags))
362: return(mdoc_perr(m, ln, pp, EBODYPROL));
363:
364: return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.73 kristaps 365: }
366:
367:
368: static int
369: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1 kristaps 370: {
371:
1.25 kristaps 372: assert(mdoc->last);
373: assert(mdoc->first);
374: assert(MDOC_ROOT != p->type);
1.1 kristaps 375:
1.13 kristaps 376: switch (mdoc->next) {
377: case (MDOC_NEXT_SIBLING):
1.6 kristaps 378: mdoc->last->next = p;
379: p->prev = mdoc->last;
1.13 kristaps 380: p->parent = mdoc->last->parent;
1.1 kristaps 381: break;
1.13 kristaps 382: case (MDOC_NEXT_CHILD):
383: mdoc->last->child = p;
1.1 kristaps 384: p->parent = mdoc->last;
385: break;
386: default:
1.13 kristaps 387: abort();
388: /* NOTREACHED */
1.1 kristaps 389: }
390:
1.86 kristaps 391: p->parent->nchild++;
392:
1.23 kristaps 393: if ( ! mdoc_valid_pre(mdoc, p))
394: return(0);
1.68 kristaps 395: if ( ! mdoc_action_pre(mdoc, p))
396: return(0);
1.27 kristaps 397:
398: switch (p->type) {
399: case (MDOC_HEAD):
400: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 401: p->parent->head = p;
1.27 kristaps 402: break;
403: case (MDOC_TAIL):
404: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 405: p->parent->tail = p;
1.27 kristaps 406: break;
407: case (MDOC_BODY):
408: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 409: p->parent->body = p;
1.27 kristaps 410: break;
411: default:
412: break;
413: }
414:
1.1 kristaps 415: mdoc->last = p;
1.71 kristaps 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:
1.23 kristaps 428: return(1);
1.1 kristaps 429: }
430:
431:
1.45 kristaps 432: static struct mdoc_node *
1.91 kristaps 433: node_alloc(struct mdoc *m, int line,
1.73 kristaps 434: int pos, int tok, enum mdoc_type type)
1.45 kristaps 435: {
1.46 kristaps 436: struct mdoc_node *p;
437:
1.73 kristaps 438: if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
1.91 kristaps 439: (void)mdoc_nerr(m, m->last, EMALLOC);
1.73 kristaps 440: return(NULL);
441: }
442:
1.91 kristaps 443: p->sec = m->lastsec;
1.73 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);
1.45 kristaps 449:
1.46 kristaps 450: return(p);
1.45 kristaps 451: }
452:
453:
1.23 kristaps 454: int
1.91 kristaps 455: mdoc_tail_alloc(struct mdoc *m, int line, int pos, int tok)
1.17 kristaps 456: {
457: struct mdoc_node *p;
458:
1.91 kristaps 459: p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.73 kristaps 460: if (NULL == p)
461: return(0);
1.91 kristaps 462: return(node_append(m, p));
1.17 kristaps 463: }
464:
465:
1.23 kristaps 466: int
1.91 kristaps 467: mdoc_head_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 468: {
469: struct mdoc_node *p;
470:
1.91 kristaps 471: assert(m->first);
472: assert(m->last);
1.1 kristaps 473:
1.91 kristaps 474: p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.73 kristaps 475: if (NULL == p)
476: return(0);
1.91 kristaps 477: return(node_append(m, p));
1.1 kristaps 478: }
479:
480:
1.23 kristaps 481: int
1.91 kristaps 482: mdoc_body_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 483: {
484: struct mdoc_node *p;
485:
1.91 kristaps 486: p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.73 kristaps 487: if (NULL == p)
488: return(0);
1.91 kristaps 489: return(node_append(m, p));
1.1 kristaps 490: }
491:
492:
1.23 kristaps 493: int
1.91 kristaps 494: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.53 kristaps 495: int tok, struct mdoc_arg *args)
1.1 kristaps 496: {
497: struct mdoc_node *p;
498:
1.91 kristaps 499: p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.73 kristaps 500: if (NULL == p)
501: return(0);
1.77 kristaps 502: p->args = args;
503: if (p->args)
1.53 kristaps 504: (args->refcnt)++;
1.91 kristaps 505: return(node_append(m, p));
1.1 kristaps 506: }
507:
508:
1.23 kristaps 509: int
1.91 kristaps 510: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.53 kristaps 511: int tok, struct mdoc_arg *args)
1.1 kristaps 512: {
513: struct mdoc_node *p;
514:
1.91 kristaps 515: p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.73 kristaps 516: if (NULL == p)
517: return(0);
1.77 kristaps 518: p->args = args;
519: if (p->args)
1.53 kristaps 520: (args->refcnt)++;
1.91 kristaps 521: return(node_append(m, p));
1.1 kristaps 522: }
523:
524:
1.91 kristaps 525: static int
526: pstring(struct mdoc *m, int line, int pos, const char *p, size_t len)
1.1 kristaps 527: {
1.91 kristaps 528: struct mdoc_node *n;
529: size_t sv;
1.1 kristaps 530:
1.91 kristaps 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));
1.73 kristaps 539: }
1.88 kristaps 540:
1.91 kristaps 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:
1.53 kristaps 558: void
559: mdoc_node_free(struct mdoc_node *p)
1.1 kristaps 560: {
561:
1.86 kristaps 562: if (p->parent)
563: p->parent->nchild--;
1.53 kristaps 564: if (p->string)
565: free(p->string);
566: if (p->args)
567: mdoc_argv_free(p->args);
1.1 kristaps 568: free(p);
569: }
570:
571:
1.53 kristaps 572: void
573: mdoc_node_freelist(struct mdoc_node *p)
1.1 kristaps 574: {
575:
1.53 kristaps 576: if (p->child)
577: mdoc_node_freelist(p->child);
578: if (p->next)
579: mdoc_node_freelist(p->next);
1.1 kristaps 580:
1.86 kristaps 581: assert(0 == p->nchild);
1.53 kristaps 582: mdoc_node_free(p);
1.1 kristaps 583: }
584:
585:
1.53 kristaps 586: /*
587: * Parse free-form text, that is, a line that does not begin with the
588: * control character.
589: */
590: static int
1.68 kristaps 591: parsetext(struct mdoc *m, int line, char *buf)
1.1 kristaps 592: {
1.91 kristaps 593: int i, j;
1.1 kristaps 594:
1.85 kristaps 595: if (SEC_NONE == m->lastnamed)
1.88 kristaps 596: return(mdoc_perr(m, line, 0, ETEXTPROL));
1.91 kristaps 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: */
602:
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. */
1.1 kristaps 611:
1.91 kristaps 612: for (i = 0; ' ' == buf[i]; i++)
613: /* Skip leading whitespace. */ ;
614: if (0 == buf[i])
1.88 kristaps 615: return(mdoc_perr(m, line, 0, ENOBLANK));
1.68 kristaps 616:
1.91 kristaps 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)))
1.53 kristaps 644: return(0);
1.1 kristaps 645:
1.68 kristaps 646: m->next = MDOC_NEXT_SIBLING;
1.53 kristaps 647: return(1);
1.1 kristaps 648: }
649:
650:
1.91 kristaps 651:
652:
1.58 kristaps 653: static int
654: macrowarn(struct mdoc *m, int ln, const char *buf)
655: {
656: if ( ! (MDOC_IGN_MACRO & m->pflags))
1.96 kristaps 657: return(mdoc_verr(m, ln, 0,
1.73 kristaps 658: "unknown macro: %s%s",
1.59 kristaps 659: buf, strlen(buf) > 3 ? "..." : ""));
1.96 kristaps 660: return(mdoc_vwarn(m, ln, 0, "unknown macro: %s%s",
1.59 kristaps 661: buf, strlen(buf) > 3 ? "..." : ""));
1.58 kristaps 662: }
663:
664:
1.53 kristaps 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)
1.1 kristaps 671: {
1.100 ! kristaps 672: int i, j, c, ppos;
1.53 kristaps 673: char mac[5];
1.1 kristaps 674:
1.81 kristaps 675: /* Empty lines are ignored. */
1.63 kristaps 676:
677: if (0 == buf[1])
678: return(1);
679:
1.100 ! kristaps 680: i = 1;
! 681:
! 682: /* Accept whitespace after the initial control char. */
! 683:
! 684: if (' ' == buf[i]) {
! 685: i++;
1.65 kristaps 686: while (buf[i] && ' ' == buf[i])
1.63 kristaps 687: i++;
688: if (0 == buf[i])
689: return(1);
690: }
1.1 kristaps 691:
1.100 ! kristaps 692: ppos = i;
! 693:
1.53 kristaps 694: /* Copy the first word into a nil-terminated buffer. */
1.1 kristaps 695:
1.100 ! kristaps 696: for (j = 0; j < 4; j++, i++) {
! 697: if (0 == (mac[j] = buf[i]))
1.53 kristaps 698: break;
1.65 kristaps 699: else if (' ' == buf[i])
1.53 kristaps 700: break;
701: }
1.1 kristaps 702:
1.100 ! kristaps 703: mac[j] = 0;
1.1 kristaps 704:
1.100 ! kristaps 705: if (j == 4 || j < 2) {
1.58 kristaps 706: if ( ! macrowarn(m, ln, mac))
707: goto err;
708: return(1);
1.53 kristaps 709: }
710:
1.74 kristaps 711: if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
1.58 kristaps 712: if ( ! macrowarn(m, ln, mac))
713: goto err;
714: return(1);
1.53 kristaps 715: }
1.1 kristaps 716:
1.53 kristaps 717: /* The macro is sane. Jump to the next word. */
1.1 kristaps 718:
1.65 kristaps 719: while (buf[i] && ' ' == buf[i])
1.53 kristaps 720: i++;
1.1 kristaps 721:
1.98 kristaps 722: /*
723: * Begin recursive parse sequence. Since we're at the start of
724: * the line, we don't need to do callable/parseable checks.
725: */
1.100 ! kristaps 726: if ( ! mdoc_macro(m, c, ln, ppos, &i, buf))
1.53 kristaps 727: goto err;
1.1 kristaps 728:
1.53 kristaps 729: return(1);
1.1 kristaps 730:
1.53 kristaps 731: err: /* Error out. */
1.1 kristaps 732:
1.53 kristaps 733: m->flags |= MDOC_HALT;
734: return(0);
1.1 kristaps 735: }
1.100 ! kristaps 736:
! 737:
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