mdoc.c

   1 /* $Id: mdoc.c,v 1.27 2009/01/12 12:52:21 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
   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 <err.h>
  22 #include <stdarg.h>
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "private.h"
  28
  29 const   char *const __mdoc_macronames[MDOC_MAX] = {
  30         "\\\"",         "Dd",           "Dt",           "Os",
  31         "Sh",           "Ss",           "Pp",           "D1",
  32         "Dl",           "Bd",           "Ed",           "Bl",
  33         "El",           "It",           "Ad",           "An",
  34         "Ar",           "Cd",           "Cm",           "Dv",
  35         "Er",           "Ev",           "Ex",           "Fa",
  36         "Fd",           "Fl",           "Fn",           "Ft",
  37         "Ic",           "In",           "Li",           "Nd",
  38         "Nm",           "Op",           "Ot",           "Pa",
  39         "Rv",           "St",           "Va",           "Vt",
  40         /* LINTED */
  41         "Xr",           "\%A",          "\%B",          "\%D",
  42         /* LINTED */
  43         "\%I",          "\%J",          "\%N",          "\%O",
  44         /* LINTED */
  45         "\%P",          "\%R",          "\%T",          "\%V",
  46         "Ac",           "Ao",           "Aq",           "At",
  47         "Bc",           "Bf",           "Bo",           "Bq",
  48         "Bsx",          "Bx",           "Db",           "Dc",
  49         "Do",           "Dq",           "Ec",           "Ef",
  50         "Em",           "Eo",           "Fx",           "Ms",
  51         "No",           "Ns",           "Nx",           "Ox",
  52         "Pc",           "Pf",           "Po",           "Pq",
  53         "Qc",           "Ql",           "Qo",           "Qq",
  54         "Re",           "Rs",           "Sc",           "So",
  55         "Sq",           "Sm",           "Sx",           "Sy",
  56         "Tn",           "Ux",           "Xc",           "Xo",
  57         "Fo",           "Fc",           "Oo",           "Oc",
  58         "Bk",           "Ek",           "Bt",           "Hf",
  59         "Fr",           "Ud",
  60         };
  61
  62 const   char *const __mdoc_argnames[MDOC_ARG_MAX] = {
  63         "split",                "nosplit",              "ragged",
  64         "unfilled",             "literal",              "file",
  65         "offset",               "bullet",               "dash",
  66         "hyphen",               "item",                 "enum",
  67         "tag",                  "diag",                 "hang",
  68         "ohang",                "inset",                "column",
  69         "width",                "compact",              "std",
  70         "p1003.1-88",           "p1003.1-90",           "p1003.1-96",
  71         "p1003.1-2001",         "p1003.1-2004",         "p1003.1",
  72         "p1003.1b",             "p1003.1b-93",          "p1003.1c-95",
  73         "p1003.1g-2000",        "p1003.2-92",           "p1387.2-95",
  74         "p1003.2",              "p1387.2",              "isoC-90",
  75         "isoC-amd1",            "isoC-tcor1",           "isoC-tcor2",
  76         "isoC-99",              "ansiC",                "ansiC-89",
  77         "ansiC-99",             "ieee754",              "iso8802-3",
  78         "xpg3",                 "xpg4",                 "xpg4.2",
  79         "xpg4.3",               "xbd5",                 "xcu5",
  80         "xsh5",                 "xns5",                 "xns5.2d2.0",
  81         "xcurses4.2",           "susv2",                "susv3",
  82         "svid4",                "filled",               "words",
  83         "emphasis",             "symbolic",
  84         };
  85
  86 const   struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
  87         { NULL, 0 }, /* \" */
  88         { macro_constant, MDOC_PROLOGUE }, /* Dd */
  89         { macro_constant, MDOC_PROLOGUE }, /* Dt */
  90         { macro_constant, MDOC_PROLOGUE }, /* Os */
  91         { macro_scoped, 0 }, /* Sh */
  92         { macro_scoped, 0 }, /* Ss */
  93         { macro_text, 0 }, /* Pp */
  94         { macro_scoped_line, MDOC_PARSED }, /* D1 */
  95         { macro_scoped_line, MDOC_PARSED }, /* Dl */
  96         { macro_scoped, MDOC_EXPLICIT }, /* Bd */
  97         { macro_close_explicit, 0 }, /* Ed */
  98         { macro_scoped, MDOC_EXPLICIT }, /* Bl */
  99         { macro_close_explicit, 0 }, /* El */
 100         { macro_scoped, MDOC_NESTED | MDOC_PARSED }, /* It */
 101         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
 102         { macro_constant, MDOC_PARSED }, /* An */
 103         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
 104         { macro_constant, MDOC_QUOTABLE }, /* Cd */
 105         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
 106         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
 107         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
 108         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
 109         { macro_constant, 0 }, /* Ex */
 110         { macro_text, MDOC_CALLABLE | MDOC_QUOTABLE | MDOC_PARSED }, /* Fa */
 111         { macro_constant, 0 }, /* Fd */
 112         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
 113         { macro_text, MDOC_CALLABLE | MDOC_QUOTABLE | MDOC_PARSED }, /* Fn */
 114         { macro_text, MDOC_PARSED }, /* Ft */
 115         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */
 116         { macro_constant, 0 }, /* In */
 117         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
 118         { macro_constant, 0 }, /* Nd */
 119         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
 120         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
 121         { macro_obsolete, 0 }, /* Ot */
 122         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
 123         { macro_constant, 0 }, /* Rv */
 124         /* XXX - .St supposed to be (but isn't) callable. */
 125         { macro_constant_delimited, MDOC_PARSED }, /* St */
 126         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
 127         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
 128         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
 129         { macro_constant, MDOC_QUOTABLE }, /* %A */
 130         { macro_constant, MDOC_QUOTABLE }, /* %B */
 131         { macro_constant, MDOC_QUOTABLE }, /* %D */
 132         { macro_constant, MDOC_QUOTABLE }, /* %I */
 133         { macro_constant, MDOC_QUOTABLE }, /* %J */
 134         { macro_constant, MDOC_QUOTABLE }, /* %N */
 135         { macro_constant, MDOC_QUOTABLE }, /* %O */
 136         { macro_constant, MDOC_QUOTABLE }, /* %P */
 137         { macro_constant, MDOC_QUOTABLE }, /* %R */
 138         { macro_constant, MDOC_QUOTABLE }, /* %T */
 139         { macro_constant, MDOC_QUOTABLE }, /* %V */
 140         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
 141         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Ao */
 142         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
 143         { macro_constant, 0 }, /* At */
 144         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
 145         { macro_scoped, MDOC_EXPLICIT }, /* Bf */
 146         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Bo */
 147         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */
 148         { macro_constant_delimited, MDOC_PARSED }, /* Bsx */
 149         { macro_constant_delimited, MDOC_PARSED }, /* Bx */
 150         { macro_constant, 0 }, /* Db */
 151         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
 152         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Do */
 153         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
 154         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
 155         { macro_close_explicit, 0 }, /* Ef */
 156         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Em */
 157         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Eo */
 158         { macro_constant_delimited, MDOC_PARSED }, /* Fx */
 159         { macro_text, MDOC_PARSED }, /* Ms */
 160         { macro_constant_delimited, MDOC_CALLABLE | MDOC_PARSED }, /* No */
 161         { macro_constant_delimited, MDOC_CALLABLE | MDOC_PARSED }, /* Ns */
 162         { macro_constant_delimited, MDOC_PARSED }, /* Nx */
 163         { macro_constant_delimited, MDOC_PARSED }, /* Ox */
 164         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
 165         { macro_constant, MDOC_PARSED }, /* Pf */
 166         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Po */
 167         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
 168         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
 169         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
 170         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Qo */
 171         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
 172         { macro_close_explicit, 0 }, /* Re */
 173         { macro_scoped, MDOC_EXPLICIT }, /* Rs */
 174         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
 175         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* So */
 176         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */
 177         { macro_constant, 0 }, /* Sm */
 178         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
 179         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
 180         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
 181         { macro_constant_delimited, MDOC_PARSED }, /* Ux */
 182         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
 183         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Xo */
 184         /* XXX - .Fo supposed to be (but isn't) callable. */
 185         { macro_scoped, MDOC_EXPLICIT | MDOC_PARSED }, /* Fo */
 186         /* XXX - .Fc supposed to be (but isn't) callable. */
 187         { macro_close_explicit, MDOC_PARSED }, /* Fc */
 188         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED }, /* Oo */
 189         { macro_close_explicit, MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
 190         { macro_scoped, MDOC_EXPLICIT }, /* Bk */
 191         { macro_close_explicit, 0 }, /* Ek */
 192         { macro_constant, 0 }, /* Bt */
 193         { macro_constant, 0 }, /* Hf */
 194         { macro_obsolete, 0 }, /* Fr */
 195         { macro_constant, 0 }, /* Ud */
 196 };
 197
 198 const   char * const *mdoc_macronames = __mdoc_macronames;
 199 const   char * const *mdoc_argnames = __mdoc_argnames;
 200 const   struct mdoc_macro * const mdoc_macros = __mdoc_macros;
 201
 202
 203 static  struct mdoc_arg  *argdup(size_t, const struct mdoc_arg *);
 204 static  void              argfree(size_t, struct mdoc_arg *);
 205 static  void              argcpy(struct mdoc_arg *,
 206                                 const struct mdoc_arg *);
 207
 208 static  void              mdoc_node_freelist(struct mdoc_node *);
 209 static  int               mdoc_node_append(struct mdoc *,
 210                                 struct mdoc_node *);
 211 static  void              mdoc_elem_free(struct mdoc_elem *);
 212 static  void              mdoc_text_free(struct mdoc_text *);
 213
 214
 215 const struct mdoc_node *
 216 mdoc_result(struct mdoc *mdoc)
 217 {
 218
 219         return(mdoc->first);
 220 }
 221
 222
 223 void
 224 mdoc_free(struct mdoc *mdoc)
 225 {
 226
 227         if (mdoc->first)
 228                 mdoc_node_freelist(mdoc->first);
 229         if (mdoc->htab)
 230                 mdoc_tokhash_free(mdoc->htab);
 231
 232         free(mdoc);
 233 }
 234
 235
 236 struct mdoc *
 237 mdoc_alloc(void *data, const struct mdoc_cb *cb)
 238 {
 239         struct mdoc     *p;
 240
 241         p = xcalloc(1, sizeof(struct mdoc));
 242
 243         p->data = data;
 244         (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
 245
 246         p->last = xcalloc(1, sizeof(struct mdoc_node));
 247         p->last->type = MDOC_ROOT;
 248         p->first = p->last;
 249
 250         p->next = MDOC_NEXT_CHILD;
 251         p->htab = mdoc_tokhash_alloc();
 252
 253         return(p);
 254 }
 255
 256
 257 int
 258 mdoc_endparse(struct mdoc *mdoc)
 259 {
 260
 261         if (MDOC_HALT & mdoc->flags)
 262                 return(0);
 263         if (NULL == mdoc->first)
 264                 return(1);
 265
 266         assert(mdoc->last);
 267         if ( ! macro_end(mdoc)) {
 268                 mdoc->flags |= MDOC_HALT;
 269                 return(0);
 270         }
 271         return(1);
 272 }
 273
 274
 275 int
 276 mdoc_parseln(struct mdoc *mdoc, int line, char *buf)
 277 {
 278         int               c, i;
 279         char              tmp[5];
 280
 281         if (MDOC_HALT & mdoc->flags)
 282                 return(0);
 283
 284         if ('.' != *buf) {
 285                 if (SEC_PROLOGUE != mdoc->sec_lastn) {
 286                         if ( ! mdoc_word_alloc(mdoc, line, 0, buf))
 287                                 return(0);
 288                         mdoc->next = MDOC_NEXT_SIBLING;
 289                         return(1);
 290                 }
 291                 return(mdoc_perr(mdoc, line, 0, ERR_SYNTAX_NOTEXT));
 292         }
 293
 294         if (buf[1] && '\\' == buf[1])
 295                 if (buf[2] && '\"' == buf[2])
 296                         return(1);
 297
 298         i = 1;
 299         while (buf[i] && ! isspace(buf[i]) && i < (int)sizeof(tmp))
 300                 i++;
 301
 302         if (i == (int)sizeof(tmp)) {
 303                 mdoc->flags |= MDOC_HALT;
 304                 return(mdoc_perr(mdoc, line, 1, ERR_MACRO_NOTSUP));
 305         } else if (i <= 2) {
 306                 mdoc->flags |= MDOC_HALT;
 307                 return(mdoc_perr(mdoc, line, 1, ERR_MACRO_NOTSUP));
 308         }
 309
 310         i--;
 311
 312         (void)memcpy(tmp, buf + 1, (size_t)i);
 313         tmp[i++] = 0;
 314
 315         if (MDOC_MAX == (c = mdoc_find(mdoc, tmp))) {
 316                 mdoc->flags |= MDOC_HALT;
 317                 return(mdoc_perr(mdoc, line, 1, ERR_MACRO_NOTSUP));
 318         }
 319
 320         while (buf[i] && isspace(buf[i]))
 321                 i++;
 322
 323         if ( ! mdoc_macro(mdoc, c, line, 1, &i, buf)) {
 324                 mdoc->flags |= MDOC_HALT;
 325                 return(0);
 326         }
 327         return(1);
 328 }
 329
 330
 331 void
 332 mdoc_msg(struct mdoc *mdoc, const char *fmt, ...)
 333 {
 334         struct mdoc_node *n;
 335         va_list           ap;
 336         char              buf[256];
 337
 338         if (NULL == mdoc->cb.mdoc_msg)
 339                 return;
 340
 341         n = mdoc->last;
 342         assert(n);
 343
 344         va_start(ap, fmt);
 345         (void)vsnprintf(buf, sizeof(buf), fmt, ap);
 346         va_end(ap);
 347
 348         (*mdoc->cb.mdoc_msg)(mdoc->data, n->line, n->pos, buf);
 349 }
 350
 351
 352 int
 353 mdoc_perr(struct mdoc *mdoc,
 354                 int line, int pos, enum mdoc_err type)
 355 {
 356
 357         if (NULL == mdoc->cb.mdoc_err)
 358                 return(0);
 359         return((*mdoc->cb.mdoc_err)(mdoc->data, line, pos, type));
 360 }
 361
 362
 363 int
 364 mdoc_pwarn(struct mdoc *mdoc,
 365                 int line, int pos, enum mdoc_warn type)
 366 {
 367
 368         if (NULL == mdoc->cb.mdoc_warn)
 369                 return(0);
 370         return((*mdoc->cb.mdoc_warn)(mdoc->data, line, pos, type));
 371 }
 372
 373
 374 int
 375 mdoc_macro(struct mdoc *mdoc, int tok,
 376                 int ln, int ppos, int *pos, char *buf)
 377 {
 378
 379         if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
 380                         SEC_PROLOGUE == mdoc->sec_lastn)
 381                 return(mdoc_perr(mdoc, ln, ppos, ERR_SEC_PROLOGUE));
 382
 383         if (NULL == (mdoc_macros[tok].fp))
 384                 return(mdoc_perr(mdoc, ln, ppos, ERR_MACRO_NOTSUP));
 385
 386         if (1 != ppos && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
 387                 return(mdoc_perr(mdoc, ln, ppos, ERR_MACRO_NOTCALL));
 388
 389         return((*mdoc_macros[tok].fp)(mdoc, tok, ln, ppos, pos, buf));
 390 }
 391
 392
 393 static int
 394 mdoc_node_append(struct mdoc *mdoc, struct mdoc_node *p)
 395 {
 396         const char       *on, *ot, *act;
 397
 398         assert(mdoc->last);
 399         assert(mdoc->first);
 400         assert(MDOC_ROOT != p->type);
 401
 402         if (MDOC_TEXT == mdoc->last->type)
 403                 on = "<text>";
 404         else if (MDOC_ROOT == mdoc->last->type)
 405                 on = "<root>";
 406         else
 407                 on = mdoc_macronames[mdoc->last->tok];
 408
 409         /* FIXME: put this into util.c. */
 410         switch (mdoc->last->type) {
 411         case (MDOC_TEXT):
 412                 ot = "text";
 413                 break;
 414         case (MDOC_BODY):
 415                 ot = "body";
 416                 break;
 417         case (MDOC_ELEM):
 418                 ot = "elem";
 419                 break;
 420         case (MDOC_HEAD):
 421                 ot = "head";
 422                 break;
 423         case (MDOC_TAIL):
 424                 ot = "tail";
 425                 break;
 426         case (MDOC_BLOCK):
 427                 ot = "block";
 428                 break;
 429         case (MDOC_ROOT):
 430                 ot = "root";
 431                 break;
 432         default:
 433                 abort();
 434                 /* NOTREACHED */
 435         }
 436
 437         switch (mdoc->next) {
 438         case (MDOC_NEXT_SIBLING):
 439                 mdoc->last->next = p;
 440                 p->prev = mdoc->last;
 441                 p->parent = mdoc->last->parent;
 442                 act = "sibling";
 443                 break;
 444         case (MDOC_NEXT_CHILD):
 445                 mdoc->last->child = p;
 446                 p->parent = mdoc->last;
 447                 act = "child";
 448                 break;
 449         default:
 450                 abort();
 451                 /* NOTREACHED */
 452         }
 453
 454         if ( ! mdoc_valid_pre(mdoc, p))
 455                 return(0);
 456         if ( ! mdoc_action_pre(mdoc, p))
 457                 return(0);
 458
 459         switch (p->type) {
 460         case (MDOC_HEAD):
 461                 assert(MDOC_BLOCK == p->parent->type);
 462                 p->parent->data.block.head = p;
 463                 break;
 464         case (MDOC_TAIL):
 465                 assert(MDOC_BLOCK == p->parent->type);
 466                 p->parent->data.block.tail = p;
 467                 break;
 468         case (MDOC_BODY):
 469                 assert(MDOC_BLOCK == p->parent->type);
 470                 p->parent->data.block.body = p;
 471                 break;
 472         default:
 473                 break;
 474         }
 475
 476         mdoc->last = p;
 477         mdoc_msg(mdoc, "parse: %s of %s `%s'", act, ot, on);
 478         return(1);
 479 }
 480
 481
 482 int
 483 mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
 484 {
 485         struct mdoc_node *p;
 486
 487         assert(mdoc->first);
 488         assert(mdoc->last);
 489
 490         p = xcalloc(1, sizeof(struct mdoc_node));
 491
 492         p->line = line;
 493         p->pos = pos;
 494         p->type = MDOC_TAIL;
 495         p->tok = tok;
 496
 497         return(mdoc_node_append(mdoc, p));
 498 }
 499
 500
 501 int
 502 mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
 503 {
 504         struct mdoc_node *p;
 505
 506         assert(mdoc->first);
 507         assert(mdoc->last);
 508
 509         p = xcalloc(1, sizeof(struct mdoc_node));
 510
 511         p->line = line;
 512         p->pos = pos;
 513         p->type = MDOC_HEAD;
 514         p->tok = tok;
 515
 516         return(mdoc_node_append(mdoc, p));
 517 }
 518
 519
 520 int
 521 mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
 522 {
 523         struct mdoc_node *p;
 524
 525         assert(mdoc->first);
 526         assert(mdoc->last);
 527
 528         p = xcalloc(1, sizeof(struct mdoc_node));
 529
 530         p->line = line;
 531         p->pos = pos;
 532         p->type = MDOC_BODY;
 533         p->tok = tok;
 534
 535         return(mdoc_node_append(mdoc, p));
 536 }
 537
 538
 539 int
 540 mdoc_root_alloc(struct mdoc *mdoc)
 541 {
 542         struct mdoc_node *p;
 543
 544         p = xcalloc(1, sizeof(struct mdoc_node));
 545
 546         p->type = MDOC_ROOT;
 547
 548         return(mdoc_node_append(mdoc, p));
 549 }
 550
 551
 552 int
 553 mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
 554                 int tok, size_t argsz, const struct mdoc_arg *args)
 555 {
 556         struct mdoc_node *p;
 557
 558         p = xcalloc(1, sizeof(struct mdoc_node));
 559
 560         p->pos = pos;
 561         p->line = line;
 562         p->type = MDOC_BLOCK;
 563         p->tok = tok;
 564         p->data.block.argc = argsz;
 565         p->data.block.argv = argdup(argsz, args);
 566
 567         return(mdoc_node_append(mdoc, p));
 568 }
 569
 570
 571 int
 572 mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
 573                 int tok, size_t argsz, const struct mdoc_arg *args)
 574 {
 575         struct mdoc_node *p;
 576
 577         p = xcalloc(1, sizeof(struct mdoc_node));
 578
 579         p->line = line;
 580         p->pos = pos;
 581         p->type = MDOC_ELEM;
 582         p->tok = tok;
 583         p->data.elem.argc = argsz;
 584         p->data.elem.argv = argdup(argsz, args);
 585
 586         return(mdoc_node_append(mdoc, p));
 587 }
 588
 589
 590 int
 591 mdoc_word_alloc(struct mdoc *mdoc,
 592                 int line, int pos, const char *word)
 593 {
 594         struct mdoc_node *p;
 595
 596         p = xcalloc(1, sizeof(struct mdoc_node));
 597         p->line = line;
 598         p->pos = pos;
 599         p->type = MDOC_TEXT;
 600         p->data.text.string = xstrdup(word);
 601
 602         return(mdoc_node_append(mdoc, p));
 603 }
 604
 605
 606 static void
 607 argfree(size_t sz, struct mdoc_arg *p)
 608 {
 609         int              i, j;
 610
 611         if (0 == sz)
 612                 return;
 613
 614         assert(p);
 615         /* LINTED */
 616         for (i = 0; i < (int)sz; i++)
 617                 if (p[i].sz > 0) {
 618                         assert(p[i].value);
 619                         /* LINTED */
 620                         for (j = 0; j < (int)p[i].sz; j++)
 621                                 free(p[i].value[j]);
 622                         free(p[i].value);
 623                 }
 624         free(p);
 625 }
 626
 627
 628 static void
 629 mdoc_elem_free(struct mdoc_elem *p)
 630 {
 631
 632         argfree(p->argc, p->argv);
 633 }
 634
 635
 636 static void
 637 mdoc_block_free(struct mdoc_block *p)
 638 {
 639
 640         argfree(p->argc, p->argv);
 641 }
 642
 643
 644 static void
 645 mdoc_text_free(struct mdoc_text *p)
 646 {
 647
 648         if (p->string)
 649                 free(p->string);
 650 }
 651
 652
 653 void
 654 mdoc_node_free(struct mdoc_node *p)
 655 {
 656
 657         switch (p->type) {
 658         case (MDOC_TEXT):
 659                 mdoc_text_free(&p->data.text);
 660                 break;
 661         case (MDOC_ELEM):
 662                 mdoc_elem_free(&p->data.elem);
 663                 break;
 664         case (MDOC_BLOCK):
 665                 mdoc_block_free(&p->data.block);
 666                 break;
 667         default:
 668                 break;
 669         }
 670
 671         free(p);
 672 }
 673
 674
 675 static void
 676 mdoc_node_freelist(struct mdoc_node *p)
 677 {
 678
 679         if (p->child)
 680                 mdoc_node_freelist(p->child);
 681         if (p->next)
 682                 mdoc_node_freelist(p->next);
 683
 684         mdoc_node_free(p);
 685 }
 686
 687
 688 int
 689 mdoc_find(const struct mdoc *mdoc, const char *key)
 690 {
 691
 692         return(mdoc_tokhash_find(mdoc->htab, key));
 693 }
 694
 695
 696 static void
 697 argcpy(struct mdoc_arg *dst, const struct mdoc_arg *src)
 698 {
 699         int              i;
 700
 701         dst->line = src->line;
 702         dst->pos = src->pos;
 703         dst->arg = src->arg;
 704         if (0 == (dst->sz = src->sz))
 705                 return;
 706         dst->value = xcalloc(dst->sz, sizeof(char *));
 707         for (i = 0; i < (int)dst->sz; i++)
 708                 dst->value[i] = xstrdup(src->value[i]);
 709 }
 710
 711
 712 static struct mdoc_arg *
 713 argdup(size_t argsz, const struct mdoc_arg *args)
 714 {
 715         struct mdoc_arg *pp;
 716         int              i;
 717
 718         if (0 == argsz)
 719                 return(NULL);
 720
 721         pp = xcalloc((size_t)argsz, sizeof(struct mdoc_arg));
 722         for (i = 0; i < (int)argsz; i++)
 723                 argcpy(&pp[i], &args[i]);
 724
 725         return(pp);
 726 }
 727