mdoc.c

   1 /* $Id: mdoc.c,v 1.32 2009/01/16 14:04:26 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_scoped_close, MDOC_EXPLICIT }, /* Ed */
  98         { macro_scoped, MDOC_EXPLICIT }, /* Bl */
  99         { macro_scoped_close, MDOC_EXPLICIT }, /* El */
 100         { macro_scoped, MDOC_PARSED | MDOC_TABSEP}, /* It */
 101         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
 102         { macro_text, 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 | MDOC_QUOTABLE }, /* 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_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
 141         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
 142         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
 143         { macro_constant, 0 }, /* At */
 144         { macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
 145         { macro_scoped, MDOC_EXPLICIT }, /* Bf */
 146         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* 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_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
 152         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
 153         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
 154         { macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
 155         { macro_scoped_close, MDOC_EXPLICIT }, /* Ef */
 156         { macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Em */
 157         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* 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_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
 165         { macro_constant_delimited, MDOC_PARSED }, /* Pf */
 166         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
 167         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
 168         { macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
 169         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
 170         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
 171         { macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
 172         { macro_scoped_close, MDOC_EXPLICIT }, /* Re */
 173         { macro_scoped, MDOC_EXPLICIT }, /* Rs */
 174         { macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
 175         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* 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_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
 183         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* 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_scoped_close, MDOC_EXPLICIT | MDOC_PARSED }, /* Fc */
 188         { macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
 189         { macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
 190         { macro_scoped, MDOC_EXPLICIT }, /* Bk */
 191         { macro_scoped_close, MDOC_EXPLICIT }, /* 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, "text disallowed"));
 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, "unknown macro"));
 305         } else if (i <= 2) {
 306                 mdoc->flags |= MDOC_HALT;
 307                 return(mdoc_perr(mdoc, line, 1, "unknown macro"));
 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, "unknown macro"));
 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_vmsg(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
 333 {
 334         char              buf[256];
 335         va_list           ap;
 336
 337         if (NULL == mdoc->cb.mdoc_msg)
 338                 return;
 339
 340         va_start(ap, fmt);
 341         (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
 342         va_end(ap);
 343         (*mdoc->cb.mdoc_msg)(mdoc->data, ln, pos, buf);
 344 }
 345
 346
 347 int
 348 mdoc_verr(struct mdoc *mdoc, int ln, int pos,
 349                 const char *fmt, ...)
 350 {
 351         char             buf[256];
 352         va_list          ap;
 353
 354         if (NULL == mdoc->cb.mdoc_err)
 355                 return(0);
 356
 357         va_start(ap, fmt);
 358         (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
 359         va_end(ap);
 360         return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
 361 }
 362
 363
 364 int
 365 mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
 366                 enum mdoc_warn type, const char *fmt, ...)
 367 {
 368         char             buf[256];
 369         va_list          ap;
 370
 371         if (NULL == mdoc->cb.mdoc_warn)
 372                 return(0);
 373
 374         va_start(ap, fmt);
 375         (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
 376         va_end(ap);
 377         return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
 378 }
 379
 380
 381 int
 382 mdoc_macro(struct mdoc *mdoc, int tok,
 383                 int ln, int ppos, int *pos, char *buf)
 384 {
 385
 386         assert(mdoc_macros[tok].fp);
 387
 388         if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
 389                         SEC_PROLOGUE == mdoc->sec_lastn)
 390                 return(mdoc_perr(mdoc, ln, ppos, "macro disallowed in document prologue"));
 391         if (1 != ppos && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
 392                 return(mdoc_perr(mdoc, ln, ppos, "macro not callable"));
 393         return((*mdoc_macros[tok].fp)(mdoc, tok, ln, ppos, pos, buf));
 394 }
 395
 396
 397 static int
 398 mdoc_node_append(struct mdoc *mdoc, struct mdoc_node *p)
 399 {
 400         const char       *nn, *nt, *on, *ot, *act;
 401
 402         assert(mdoc->last);
 403         assert(mdoc->first);
 404         assert(MDOC_ROOT != p->type);
 405
 406         if (MDOC_TEXT == mdoc->last->type)
 407                 on = "<text>";
 408         else if (MDOC_ROOT == mdoc->last->type)
 409                 on = "<root>";
 410         else
 411                 on = mdoc_macronames[mdoc->last->tok];
 412
 413         if (MDOC_TEXT == p->type)
 414                 nn = "<text>";
 415         else if (MDOC_ROOT == p->type)
 416                 nn = "<root>";
 417         else
 418                 nn = mdoc_macronames[p->tok];
 419
 420         ot = mdoc_type2a(mdoc->last->type);
 421         nt = mdoc_type2a(p->type);
 422
 423         switch (mdoc->next) {
 424         case (MDOC_NEXT_SIBLING):
 425                 mdoc->last->next = p;
 426                 p->prev = mdoc->last;
 427                 p->parent = mdoc->last->parent;
 428                 act = "sibling";
 429                 break;
 430         case (MDOC_NEXT_CHILD):
 431                 mdoc->last->child = p;
 432                 p->parent = mdoc->last;
 433                 act = "child";
 434                 break;
 435         default:
 436                 abort();
 437                 /* NOTREACHED */
 438         }
 439
 440         if ( ! mdoc_valid_pre(mdoc, p))
 441                 return(0);
 442         if ( ! mdoc_action_pre(mdoc, p))
 443                 return(0);
 444
 445         switch (p->type) {
 446         case (MDOC_HEAD):
 447                 assert(MDOC_BLOCK == p->parent->type);
 448                 p->parent->data.block.head = p;
 449                 break;
 450         case (MDOC_TAIL):
 451                 assert(MDOC_BLOCK == p->parent->type);
 452                 p->parent->data.block.tail = p;
 453                 break;
 454         case (MDOC_BODY):
 455                 assert(MDOC_BLOCK == p->parent->type);
 456                 p->parent->data.block.body = p;
 457                 break;
 458         default:
 459                 break;
 460         }
 461
 462         mdoc->last = p;
 463         mdoc_msg(mdoc, "parse: %s `%s' %s of %s `%s'",
 464                         nt, nn, act, ot, on);
 465         return(1);
 466 }
 467
 468
 469 int
 470 mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
 471 {
 472         struct mdoc_node *p;
 473
 474         assert(mdoc->first);
 475         assert(mdoc->last);
 476
 477         p = xcalloc(1, sizeof(struct mdoc_node));
 478
 479         p->line = line;
 480         p->pos = pos;
 481         p->type = MDOC_TAIL;
 482         p->tok = tok;
 483
 484         return(mdoc_node_append(mdoc, p));
 485 }
 486
 487
 488 int
 489 mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
 490 {
 491         struct mdoc_node *p;
 492
 493         assert(mdoc->first);
 494         assert(mdoc->last);
 495
 496         p = xcalloc(1, sizeof(struct mdoc_node));
 497
 498         p->line = line;
 499         p->pos = pos;
 500         p->type = MDOC_HEAD;
 501         p->tok = tok;
 502
 503         return(mdoc_node_append(mdoc, p));
 504 }
 505
 506
 507 int
 508 mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
 509 {
 510         struct mdoc_node *p;
 511
 512         assert(mdoc->first);
 513         assert(mdoc->last);
 514
 515         p = xcalloc(1, sizeof(struct mdoc_node));
 516
 517         p->line = line;
 518         p->pos = pos;
 519         p->type = MDOC_BODY;
 520         p->tok = tok;
 521
 522         return(mdoc_node_append(mdoc, p));
 523 }
 524
 525
 526 int
 527 mdoc_root_alloc(struct mdoc *mdoc)
 528 {
 529         struct mdoc_node *p;
 530
 531         p = xcalloc(1, sizeof(struct mdoc_node));
 532
 533         p->type = MDOC_ROOT;
 534
 535         return(mdoc_node_append(mdoc, p));
 536 }
 537
 538
 539 int
 540 mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
 541                 int tok, size_t argsz, const struct mdoc_arg *args)
 542 {
 543         struct mdoc_node *p;
 544
 545         p = xcalloc(1, sizeof(struct mdoc_node));
 546
 547         p->pos = pos;
 548         p->line = line;
 549         p->type = MDOC_BLOCK;
 550         p->tok = tok;
 551         p->data.block.argc = argsz;
 552         p->data.block.argv = argdup(argsz, args);
 553
 554         return(mdoc_node_append(mdoc, p));
 555 }
 556
 557
 558 int
 559 mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
 560                 int tok, size_t argsz, const struct mdoc_arg *args)
 561 {
 562         struct mdoc_node *p;
 563
 564         p = xcalloc(1, sizeof(struct mdoc_node));
 565
 566         p->line = line;
 567         p->pos = pos;
 568         p->type = MDOC_ELEM;
 569         p->tok = tok;
 570         p->data.elem.argc = argsz;
 571         p->data.elem.argv = argdup(argsz, args);
 572
 573         return(mdoc_node_append(mdoc, p));
 574 }
 575
 576
 577 int
 578 mdoc_word_alloc(struct mdoc *mdoc,
 579                 int line, int pos, const char *word)
 580 {
 581         struct mdoc_node *p;
 582
 583         p = xcalloc(1, sizeof(struct mdoc_node));
 584         p->line = line;
 585         p->pos = pos;
 586         p->type = MDOC_TEXT;
 587         p->data.text.string = xstrdup(word);
 588
 589         return(mdoc_node_append(mdoc, p));
 590 }
 591
 592
 593 static void
 594 argfree(size_t sz, struct mdoc_arg *p)
 595 {
 596         int              i, j;
 597
 598         if (0 == sz)
 599                 return;
 600
 601         assert(p);
 602         /* LINTED */
 603         for (i = 0; i < (int)sz; i++)
 604                 if (p[i].sz > 0) {
 605                         assert(p[i].value);
 606                         /* LINTED */
 607                         for (j = 0; j < (int)p[i].sz; j++)
 608                                 free(p[i].value[j]);
 609                         free(p[i].value);
 610                 }
 611         free(p);
 612 }
 613
 614
 615 static void
 616 mdoc_elem_free(struct mdoc_elem *p)
 617 {
 618
 619         argfree(p->argc, p->argv);
 620 }
 621
 622
 623 static void
 624 mdoc_block_free(struct mdoc_block *p)
 625 {
 626
 627         argfree(p->argc, p->argv);
 628 }
 629
 630
 631 static void
 632 mdoc_text_free(struct mdoc_text *p)
 633 {
 634
 635         if (p->string)
 636                 free(p->string);
 637 }
 638
 639
 640 void
 641 mdoc_node_free(struct mdoc_node *p)
 642 {
 643
 644         switch (p->type) {
 645         case (MDOC_TEXT):
 646                 mdoc_text_free(&p->data.text);
 647                 break;
 648         case (MDOC_ELEM):
 649                 mdoc_elem_free(&p->data.elem);
 650                 break;
 651         case (MDOC_BLOCK):
 652                 mdoc_block_free(&p->data.block);
 653                 break;
 654         default:
 655                 break;
 656         }
 657
 658         free(p);
 659 }
 660
 661
 662 static void
 663 mdoc_node_freelist(struct mdoc_node *p)
 664 {
 665
 666         if (p->child)
 667                 mdoc_node_freelist(p->child);
 668         if (p->next)
 669                 mdoc_node_freelist(p->next);
 670
 671         mdoc_node_free(p);
 672 }
 673
 674
 675 int
 676 mdoc_find(const struct mdoc *mdoc, const char *key)
 677 {
 678
 679         return(mdoc_tokhash_find(mdoc->htab, key));
 680 }
 681
 682
 683 static void
 684 argcpy(struct mdoc_arg *dst, const struct mdoc_arg *src)
 685 {
 686         int              i;
 687
 688         dst->line = src->line;
 689         dst->pos = src->pos;
 690         dst->arg = src->arg;
 691         if (0 == (dst->sz = src->sz))
 692                 return;
 693         dst->value = xcalloc(dst->sz, sizeof(char *));
 694         for (i = 0; i < (int)dst->sz; i++)
 695                 dst->value[i] = xstrdup(src->value[i]);
 696 }
 697
 698
 699 static struct mdoc_arg *
 700 argdup(size_t argsz, const struct mdoc_arg *args)
 701 {
 702         struct mdoc_arg *pp;
 703         int              i;
 704
 705         if (0 == argsz)
 706                 return(NULL);
 707
 708         pp = xcalloc((size_t)argsz, sizeof(struct mdoc_arg));
 709         for (i = 0; i < (int)argsz; i++)
 710                 argcpy(&pp[i], &args[i]);
 711
 712         return(pp);
 713 }
 714