Annotation of mandoc/mdoc.c, Revision 1.113
1.113 ! kristaps 1: /* $Id: mdoc.c,v 1.112 2009/10/27 08:26:12 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: */
1.106 kristaps 17: #include <sys/types.h>
18:
1.1 kristaps 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"
1.113 ! kristaps 27: #include "libmandoc.h"
1.1 kristaps 28:
1.89 kristaps 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 */
1.107 kristaps 79: "no description found for library", /* ELIB */
80: "bad child for parent context", /* EBADCHILD */
1.109 kristaps 81: "list arguments preceding type", /* ENOTYPE */
1.89 kristaps 82: };
83:
1.1 kristaps 84: const char *const __mdoc_macronames[MDOC_MAX] = {
1.82 kristaps 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",
1.82 kristaps 114: "Fr", "Ud", "Lb", "Lp",
115: "Lk", "Mt", "Brq", "Bro",
1.64 kristaps 116: /* LINTED */
1.82 kristaps 117: "Brc", "\%C", "Es", "En",
1.69 kristaps 118: /* LINTED */
1.110 kristaps 119: "Dx", "\%Q", "br", "sp",
120: /* LINTED */
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",
1.52 kristaps 132: "filled", "words", "emphasis",
1.108 kristaps 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:
1.73 kristaps 139: static void mdoc_free1(struct mdoc *);
1.113 ! kristaps 140: static void mdoc_alloc1(struct mdoc *);
1.73 kristaps 141: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
142: int, enum mdoc_type);
143: static int node_append(struct mdoc *,
1.71 kristaps 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 *);
1.91 kristaps 148: static int pstring(struct mdoc *, int, int,
149: const char *, size_t);
1.88 kristaps 150:
1.92 kristaps 151: #ifdef __linux__
152: extern size_t strlcpy(char *, const char *, size_t);
153: #endif
154:
1.71 kristaps 155:
1.1 kristaps 156: const struct mdoc_node *
1.71 kristaps 157: mdoc_node(const struct mdoc *m)
1.1 kristaps 158: {
159:
1.71 kristaps 160: return(MDOC_HALT & m->flags ? NULL : m->first);
1.1 kristaps 161: }
162:
163:
1.37 kristaps 164: const struct mdoc_meta *
1.71 kristaps 165: mdoc_meta(const struct mdoc *m)
1.37 kristaps 166: {
167:
1.71 kristaps 168: return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37 kristaps 169: }
170:
171:
1.85 kristaps 172: /*
173: * Frees volatile resources (parse tree, meta-data, fields).
174: */
1.73 kristaps 175: static void
176: mdoc_free1(struct mdoc *mdoc)
1.67 kristaps 177: {
178:
179: if (mdoc->first)
180: mdoc_node_freelist(mdoc->first);
181: if (mdoc->meta.title)
182: free(mdoc->meta.title);
183: if (mdoc->meta.os)
184: free(mdoc->meta.os);
185: if (mdoc->meta.name)
186: free(mdoc->meta.name);
187: if (mdoc->meta.arch)
188: free(mdoc->meta.arch);
189: if (mdoc->meta.vol)
190: free(mdoc->meta.vol);
1.73 kristaps 191: }
192:
193:
1.85 kristaps 194: /*
195: * Allocate all volatile resources (parse tree, meta-data, fields).
196: */
1.113 ! kristaps 197: static void
1.73 kristaps 198: mdoc_alloc1(struct mdoc *mdoc)
199: {
1.67 kristaps 200:
1.112 kristaps 201: memset(&mdoc->meta, 0, sizeof(struct mdoc_meta));
1.67 kristaps 202: mdoc->flags = 0;
1.85 kristaps 203: mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.113 ! kristaps 204: mdoc->last = mandoc_calloc(1, sizeof(struct mdoc_node));
1.70 kristaps 205: mdoc->first = mdoc->last;
1.67 kristaps 206: mdoc->last->type = MDOC_ROOT;
207: mdoc->next = MDOC_NEXT_CHILD;
1.73 kristaps 208: }
209:
210:
211: /*
1.85 kristaps 212: * Free up volatile resources (see mdoc_free1()) then re-initialises the
213: * data with mdoc_alloc1(). After invocation, parse data has been reset
214: * and the parser is ready for re-invocation on a new tree; however,
215: * cross-parse non-volatile data is kept intact.
1.73 kristaps 216: */
1.113 ! kristaps 217: void
1.73 kristaps 218: mdoc_reset(struct mdoc *mdoc)
219: {
220:
221: mdoc_free1(mdoc);
1.113 ! kristaps 222: mdoc_alloc1(mdoc);
1.67 kristaps 223: }
224:
225:
1.68 kristaps 226: /*
1.85 kristaps 227: * Completely free up all volatile and non-volatile parse resources.
228: * After invocation, the pointer is no longer usable.
1.68 kristaps 229: */
1.67 kristaps 230: void
1.38 kristaps 231: mdoc_free(struct mdoc *mdoc)
1.34 kristaps 232: {
233:
1.73 kristaps 234: mdoc_free1(mdoc);
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:
1.113 ! kristaps 247: p = mandoc_calloc(1, sizeof(struct mdoc));
! 248:
1.74 kristaps 249: if (cb)
1.113 ! kristaps 250: memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.105 kristaps 251:
1.1 kristaps 252: p->data = data;
1.73 kristaps 253: p->pflags = pflags;
254:
1.113 ! kristaps 255: mdoc_hash_init();
! 256: mdoc_alloc1(p);
! 257: return(p);
1.1 kristaps 258: }
259:
260:
1.68 kristaps 261: /*
262: * Climb back up the parse tree, validating open scopes. Mostly calls
1.85 kristaps 263: * through to macro_end() in macro.c.
1.68 kristaps 264: */
1.1 kristaps 265: int
1.72 kristaps 266: mdoc_endparse(struct mdoc *m)
1.20 kristaps 267: {
268:
1.72 kristaps 269: if (MDOC_HALT & m->flags)
1.20 kristaps 270: return(0);
1.72 kristaps 271: else if (mdoc_macroend(m))
1.20 kristaps 272: return(1);
1.72 kristaps 273: m->flags |= MDOC_HALT;
274: return(0);
1.20 kristaps 275: }
276:
277:
1.50 kristaps 278: /*
1.53 kristaps 279: * Main parse routine. Parses a single line -- really just hands off to
1.85 kristaps 280: * the macro (parsemacro()) or text parser (parsetext()).
1.50 kristaps 281: */
1.20 kristaps 282: int
1.53 kristaps 283: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1 kristaps 284: {
285:
1.53 kristaps 286: if (MDOC_HALT & m->flags)
1.20 kristaps 287: return(0);
1.50 kristaps 288:
1.53 kristaps 289: return('.' == *buf ? parsemacro(m, ln, buf) :
290: parsetext(m, ln, buf));
1.1 kristaps 291: }
292:
293:
294: int
1.31 kristaps 295: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
296: const char *fmt, ...)
1.1 kristaps 297: {
1.31 kristaps 298: char buf[256];
299: va_list ap;
1.1 kristaps 300:
301: if (NULL == mdoc->cb.mdoc_err)
302: return(0);
1.31 kristaps 303:
304: va_start(ap, fmt);
305: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
306: va_end(ap);
1.88 kristaps 307:
1.31 kristaps 308: return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1 kristaps 309: }
310:
311:
312: int
1.87 kristaps 313: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1 kristaps 314: {
1.31 kristaps 315: char buf[256];
316: va_list ap;
1.1 kristaps 317:
318: if (NULL == mdoc->cb.mdoc_warn)
319: return(0);
1.31 kristaps 320:
321: va_start(ap, fmt);
322: (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
323: va_end(ap);
1.88 kristaps 324:
1.87 kristaps 325: return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, buf));
1.1 kristaps 326: }
327:
328:
329: int
1.88 kristaps 330: mdoc_err(struct mdoc *m, int line, int pos, int iserr, enum merr type)
1.78 kristaps 331: {
1.89 kristaps 332: const char *p;
1.88 kristaps 333:
1.89 kristaps 334: p = __mdoc_merrnames[(int)type];
1.73 kristaps 335: assert(p);
1.88 kristaps 336:
337: if (iserr)
338: return(mdoc_verr(m, line, pos, p));
339:
340: return(mdoc_vwarn(m, line, pos, p));
341: }
342:
343:
344: int
345: mdoc_macro(struct mdoc *m, int tok,
346: int ln, int pp, int *pos, char *buf)
347: {
1.97 kristaps 348: /*
349: * If we're in the prologue, deny "body" macros. Similarly, if
350: * we're in the body, deny prologue calls.
351: */
1.88 kristaps 352: if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
353: MDOC_PBODY & m->flags)
354: return(mdoc_perr(m, ln, pp, EPROLBODY));
355: if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
356: ! (MDOC_PBODY & m->flags))
357: return(mdoc_perr(m, ln, pp, EBODYPROL));
358:
359: return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.73 kristaps 360: }
361:
362:
363: static int
364: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1 kristaps 365: {
366:
1.25 kristaps 367: assert(mdoc->last);
368: assert(mdoc->first);
369: assert(MDOC_ROOT != p->type);
1.1 kristaps 370:
1.13 kristaps 371: switch (mdoc->next) {
372: case (MDOC_NEXT_SIBLING):
1.6 kristaps 373: mdoc->last->next = p;
374: p->prev = mdoc->last;
1.13 kristaps 375: p->parent = mdoc->last->parent;
1.1 kristaps 376: break;
1.13 kristaps 377: case (MDOC_NEXT_CHILD):
378: mdoc->last->child = p;
1.1 kristaps 379: p->parent = mdoc->last;
380: break;
381: default:
1.13 kristaps 382: abort();
383: /* NOTREACHED */
1.1 kristaps 384: }
385:
1.86 kristaps 386: p->parent->nchild++;
387:
1.23 kristaps 388: if ( ! mdoc_valid_pre(mdoc, p))
389: return(0);
1.68 kristaps 390: if ( ! mdoc_action_pre(mdoc, p))
391: return(0);
1.27 kristaps 392:
393: switch (p->type) {
394: case (MDOC_HEAD):
395: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 396: p->parent->head = p;
1.27 kristaps 397: break;
398: case (MDOC_TAIL):
399: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 400: p->parent->tail = p;
1.27 kristaps 401: break;
402: case (MDOC_BODY):
403: assert(MDOC_BLOCK == p->parent->type);
1.53 kristaps 404: p->parent->body = p;
1.27 kristaps 405: break;
406: default:
407: break;
408: }
409:
1.1 kristaps 410: mdoc->last = p;
1.71 kristaps 411:
412: switch (p->type) {
413: case (MDOC_TEXT):
414: if ( ! mdoc_valid_post(mdoc))
415: return(0);
416: if ( ! mdoc_action_post(mdoc))
417: return(0);
418: break;
419: default:
420: break;
421: }
422:
1.23 kristaps 423: return(1);
1.1 kristaps 424: }
425:
426:
1.45 kristaps 427: static struct mdoc_node *
1.91 kristaps 428: node_alloc(struct mdoc *m, int line,
1.73 kristaps 429: int pos, int tok, enum mdoc_type type)
1.45 kristaps 430: {
1.46 kristaps 431: struct mdoc_node *p;
432:
1.113 ! kristaps 433: p = mandoc_calloc(1, sizeof(struct mdoc_node));
1.91 kristaps 434: p->sec = m->lastsec;
1.73 kristaps 435: p->line = line;
436: p->pos = pos;
437: p->tok = tok;
438: if (MDOC_TEXT != (p->type = type))
439: assert(p->tok >= 0);
1.45 kristaps 440:
1.46 kristaps 441: return(p);
1.45 kristaps 442: }
443:
444:
1.23 kristaps 445: int
1.91 kristaps 446: mdoc_tail_alloc(struct mdoc *m, int line, int pos, int tok)
1.17 kristaps 447: {
448: struct mdoc_node *p;
449:
1.91 kristaps 450: p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.102 kristaps 451: if ( ! node_append(m, p))
452: return(0);
453: m->next = MDOC_NEXT_CHILD;
454: return(1);
1.17 kristaps 455: }
456:
457:
1.23 kristaps 458: int
1.91 kristaps 459: mdoc_head_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 460: {
461: struct mdoc_node *p;
462:
1.91 kristaps 463: assert(m->first);
464: assert(m->last);
1.1 kristaps 465:
1.91 kristaps 466: p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.102 kristaps 467: if ( ! node_append(m, p))
468: return(0);
469: m->next = MDOC_NEXT_CHILD;
470: return(1);
1.1 kristaps 471: }
472:
473:
1.23 kristaps 474: int
1.91 kristaps 475: mdoc_body_alloc(struct mdoc *m, int line, int pos, int tok)
1.1 kristaps 476: {
477: struct mdoc_node *p;
478:
1.91 kristaps 479: p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.102 kristaps 480: if ( ! node_append(m, p))
481: return(0);
482: m->next = MDOC_NEXT_CHILD;
483: return(1);
1.1 kristaps 484: }
485:
486:
1.23 kristaps 487: int
1.91 kristaps 488: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.53 kristaps 489: int tok, struct mdoc_arg *args)
1.1 kristaps 490: {
491: struct mdoc_node *p;
492:
1.91 kristaps 493: p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.77 kristaps 494: p->args = args;
495: if (p->args)
1.53 kristaps 496: (args->refcnt)++;
1.102 kristaps 497: if ( ! node_append(m, p))
498: return(0);
499: m->next = MDOC_NEXT_CHILD;
500: return(1);
1.1 kristaps 501: }
502:
503:
1.23 kristaps 504: int
1.91 kristaps 505: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.53 kristaps 506: int tok, struct mdoc_arg *args)
1.1 kristaps 507: {
508: struct mdoc_node *p;
509:
1.91 kristaps 510: p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.77 kristaps 511: p->args = args;
512: if (p->args)
1.53 kristaps 513: (args->refcnt)++;
1.102 kristaps 514: if ( ! node_append(m, p))
515: return(0);
516: m->next = MDOC_NEXT_CHILD;
517: return(1);
1.1 kristaps 518: }
519:
520:
1.91 kristaps 521: static int
522: pstring(struct mdoc *m, int line, int pos, const char *p, size_t len)
1.1 kristaps 523: {
1.91 kristaps 524: struct mdoc_node *n;
525: size_t sv;
1.1 kristaps 526:
1.91 kristaps 527: n = node_alloc(m, line, pos, -1, MDOC_TEXT);
1.113 ! kristaps 528: n->string = mandoc_malloc(len + 1);
1.91 kristaps 529: sv = strlcpy(n->string, p, len + 1);
530:
531: /* Prohibit truncation. */
532: assert(sv < len + 1);
533:
1.101 kristaps 534: if ( ! node_append(m, n))
535: return(0);
536: m->next = MDOC_NEXT_SIBLING;
537: return(1);
1.91 kristaps 538: }
539:
540:
541: int
542: mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
543: {
544:
545: return(pstring(m, line, pos, p, strlen(p)));
1.1 kristaps 546: }
547:
548:
1.53 kristaps 549: void
550: mdoc_node_free(struct mdoc_node *p)
1.1 kristaps 551: {
552:
1.86 kristaps 553: if (p->parent)
554: p->parent->nchild--;
1.53 kristaps 555: if (p->string)
556: free(p->string);
557: if (p->args)
558: mdoc_argv_free(p->args);
1.1 kristaps 559: free(p);
560: }
561:
562:
1.53 kristaps 563: void
564: mdoc_node_freelist(struct mdoc_node *p)
1.1 kristaps 565: {
566:
1.53 kristaps 567: if (p->child)
568: mdoc_node_freelist(p->child);
569: if (p->next)
570: mdoc_node_freelist(p->next);
1.1 kristaps 571:
1.86 kristaps 572: assert(0 == p->nchild);
1.53 kristaps 573: mdoc_node_free(p);
1.1 kristaps 574: }
575:
576:
1.53 kristaps 577: /*
578: * Parse free-form text, that is, a line that does not begin with the
579: * control character.
580: */
581: static int
1.68 kristaps 582: parsetext(struct mdoc *m, int line, char *buf)
1.1 kristaps 583: {
1.91 kristaps 584: int i, j;
1.1 kristaps 585:
1.85 kristaps 586: if (SEC_NONE == m->lastnamed)
1.88 kristaps 587: return(mdoc_perr(m, line, 0, ETEXTPROL));
1.91 kristaps 588:
589: /*
590: * If in literal mode, then pass the buffer directly to the
591: * back-end, as it should be preserved as a single term.
592: */
593:
1.101 kristaps 594: if (MDOC_LITERAL & m->flags)
595: return(mdoc_word_alloc(m, line, 0, buf));
1.91 kristaps 596:
597: /* Disallow blank/white-space lines in non-literal mode. */
1.1 kristaps 598:
1.91 kristaps 599: for (i = 0; ' ' == buf[i]; i++)
600: /* Skip leading whitespace. */ ;
601: if (0 == buf[i])
1.88 kristaps 602: return(mdoc_perr(m, line, 0, ENOBLANK));
1.68 kristaps 603:
1.91 kristaps 604: /*
605: * Break apart a free-form line into tokens. Spaces are
606: * stripped out of the input.
607: */
608:
609: for (j = i; buf[i]; i++) {
610: if (' ' != buf[i])
611: continue;
612:
613: /* Escaped whitespace. */
614: if (i && ' ' == buf[i] && '\\' == buf[i - 1])
615: continue;
616:
617: buf[i++] = 0;
618: if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
619: return(0);
620:
621: for ( ; ' ' == buf[i]; i++)
622: /* Skip trailing whitespace. */ ;
623:
624: j = i;
625: if (0 == buf[i])
626: break;
627: }
628:
629: if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.53 kristaps 630: return(0);
1.1 kristaps 631:
1.68 kristaps 632: m->next = MDOC_NEXT_SIBLING;
1.53 kristaps 633: return(1);
1.1 kristaps 634: }
635:
636:
1.91 kristaps 637:
1.58 kristaps 638: static int
639: macrowarn(struct mdoc *m, int ln, const char *buf)
640: {
641: if ( ! (MDOC_IGN_MACRO & m->pflags))
1.96 kristaps 642: return(mdoc_verr(m, ln, 0,
1.73 kristaps 643: "unknown macro: %s%s",
1.59 kristaps 644: buf, strlen(buf) > 3 ? "..." : ""));
1.96 kristaps 645: return(mdoc_vwarn(m, ln, 0, "unknown macro: %s%s",
1.59 kristaps 646: buf, strlen(buf) > 3 ? "..." : ""));
1.58 kristaps 647: }
648:
649:
1.53 kristaps 650: /*
651: * Parse a macro line, that is, a line beginning with the control
652: * character.
653: */
654: int
655: parsemacro(struct mdoc *m, int ln, char *buf)
1.1 kristaps 656: {
1.103 kristaps 657: int i, j, c;
1.53 kristaps 658: char mac[5];
1.1 kristaps 659:
1.81 kristaps 660: /* Empty lines are ignored. */
1.63 kristaps 661:
662: if (0 == buf[1])
663: return(1);
664:
1.100 kristaps 665: i = 1;
666:
667: /* Accept whitespace after the initial control char. */
668:
669: if (' ' == buf[i]) {
670: i++;
1.65 kristaps 671: while (buf[i] && ' ' == buf[i])
1.63 kristaps 672: i++;
673: if (0 == buf[i])
674: return(1);
675: }
1.1 kristaps 676:
1.53 kristaps 677: /* Copy the first word into a nil-terminated buffer. */
1.1 kristaps 678:
1.100 kristaps 679: for (j = 0; j < 4; j++, i++) {
680: if (0 == (mac[j] = buf[i]))
1.53 kristaps 681: break;
1.65 kristaps 682: else if (' ' == buf[i])
1.53 kristaps 683: break;
1.104 kristaps 684:
685: /* Check for invalid characters. */
686:
687: if (isgraph((u_char)buf[i]))
688: continue;
689: return(mdoc_perr(m, ln, i, EPRINT));
1.53 kristaps 690: }
1.1 kristaps 691:
1.100 kristaps 692: mac[j] = 0;
1.1 kristaps 693:
1.100 kristaps 694: if (j == 4 || j < 2) {
1.58 kristaps 695: if ( ! macrowarn(m, ln, mac))
696: goto err;
697: return(1);
1.53 kristaps 698: }
699:
1.105 kristaps 700: if (MDOC_MAX == (c = mdoc_hash_find(mac))) {
1.58 kristaps 701: if ( ! macrowarn(m, ln, mac))
702: goto err;
703: return(1);
1.53 kristaps 704: }
1.1 kristaps 705:
1.53 kristaps 706: /* The macro is sane. Jump to the next word. */
1.1 kristaps 707:
1.65 kristaps 708: while (buf[i] && ' ' == buf[i])
1.53 kristaps 709: i++;
1.1 kristaps 710:
1.98 kristaps 711: /*
712: * Begin recursive parse sequence. Since we're at the start of
713: * the line, we don't need to do callable/parseable checks.
714: */
1.103 kristaps 715: if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
1.53 kristaps 716: goto err;
1.1 kristaps 717:
1.53 kristaps 718: return(1);
1.1 kristaps 719:
1.53 kristaps 720: err: /* Error out. */
1.1 kristaps 721:
1.53 kristaps 722: m->flags |= MDOC_HALT;
723: return(0);
1.1 kristaps 724: }
1.100 kristaps 725:
726:
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