mdoc_argv.c

   1 /*      $Id: mdoc_argv.c,v 1.91 2014/03/30 19:47:48 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2012 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21
  22 #include <sys/types.h>
  23
  24 #include <assert.h>
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28
  29 #include "mdoc.h"
  30 #include "mandoc.h"
  31 #include "mandoc_aux.h"
  32 #include "libmdoc.h"
  33 #include "libmandoc.h"
  34
  35 #define MULTI_STEP       5 /* pre-allocate argument values */
  36 #define DELIMSZ          6 /* max possible size of a delimiter */
  37
  38 enum    argsflag {
  39         ARGSFL_NONE = 0,
  40         ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
  41         ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
  42 };
  43
  44 enum    argvflag {
  45         ARGV_NONE, /* no args to flag (e.g., -split) */
  46         ARGV_SINGLE, /* one arg to flag (e.g., -file xxx)  */
  47         ARGV_MULTI /* multiple args (e.g., -column xxx yyy) */
  48 };
  49
  50 struct  mdocarg {
  51         enum argsflag    flags;
  52         const enum mdocargt *argvs;
  53 };
  54
  55 static  void             argn_free(struct mdoc_arg *, int);
  56 static  enum margserr    args(struct mdoc *, int, int *,
  57                                 char *, enum argsflag, char **);
  58 static  int              args_checkpunct(const char *, int);
  59 static  int              argv_multi(struct mdoc *, int,
  60                                 struct mdoc_argv *, int *, char *);
  61 static  int              argv_single(struct mdoc *, int,
  62                                 struct mdoc_argv *, int *, char *);
  63
  64 static  const enum argvflag argvflags[MDOC_ARG_MAX] = {
  65         ARGV_NONE,      /* MDOC_Split */
  66         ARGV_NONE,      /* MDOC_Nosplit */
  67         ARGV_NONE,      /* MDOC_Ragged */
  68         ARGV_NONE,      /* MDOC_Unfilled */
  69         ARGV_NONE,      /* MDOC_Literal */
  70         ARGV_SINGLE,    /* MDOC_File */
  71         ARGV_SINGLE,    /* MDOC_Offset */
  72         ARGV_NONE,      /* MDOC_Bullet */
  73         ARGV_NONE,      /* MDOC_Dash */
  74         ARGV_NONE,      /* MDOC_Hyphen */
  75         ARGV_NONE,      /* MDOC_Item */
  76         ARGV_NONE,      /* MDOC_Enum */
  77         ARGV_NONE,      /* MDOC_Tag */
  78         ARGV_NONE,      /* MDOC_Diag */
  79         ARGV_NONE,      /* MDOC_Hang */
  80         ARGV_NONE,      /* MDOC_Ohang */
  81         ARGV_NONE,      /* MDOC_Inset */
  82         ARGV_MULTI,     /* MDOC_Column */
  83         ARGV_SINGLE,    /* MDOC_Width */
  84         ARGV_NONE,      /* MDOC_Compact */
  85         ARGV_NONE,      /* MDOC_Std */
  86         ARGV_NONE,      /* MDOC_Filled */
  87         ARGV_NONE,      /* MDOC_Words */
  88         ARGV_NONE,      /* MDOC_Emphasis */
  89         ARGV_NONE,      /* MDOC_Symbolic */
  90         ARGV_NONE       /* MDOC_Symbolic */
  91 };
  92
  93 static  const enum mdocargt args_Ex[] = {
  94         MDOC_Std,
  95         MDOC_ARG_MAX
  96 };
  97
  98 static  const enum mdocargt args_An[] = {
  99         MDOC_Split,
 100         MDOC_Nosplit,
 101         MDOC_ARG_MAX
 102 };
 103
 104 static  const enum mdocargt args_Bd[] = {
 105         MDOC_Ragged,
 106         MDOC_Unfilled,
 107         MDOC_Filled,
 108         MDOC_Literal,
 109         MDOC_File,
 110         MDOC_Offset,
 111         MDOC_Compact,
 112         MDOC_Centred,
 113         MDOC_ARG_MAX
 114 };
 115
 116 static  const enum mdocargt args_Bf[] = {
 117         MDOC_Emphasis,
 118         MDOC_Literal,
 119         MDOC_Symbolic,
 120         MDOC_ARG_MAX
 121 };
 122
 123 static  const enum mdocargt args_Bk[] = {
 124         MDOC_Words,
 125         MDOC_ARG_MAX
 126 };
 127
 128 static  const enum mdocargt args_Bl[] = {
 129         MDOC_Bullet,
 130         MDOC_Dash,
 131         MDOC_Hyphen,
 132         MDOC_Item,
 133         MDOC_Enum,
 134         MDOC_Tag,
 135         MDOC_Diag,
 136         MDOC_Hang,
 137         MDOC_Ohang,
 138         MDOC_Inset,
 139         MDOC_Column,
 140         MDOC_Width,
 141         MDOC_Offset,
 142         MDOC_Compact,
 143         MDOC_Nested,
 144         MDOC_ARG_MAX
 145 };
 146
 147 static  const struct mdocarg mdocargs[MDOC_MAX] = {
 148         { ARGSFL_DELIM, NULL }, /* Ap */
 149         { ARGSFL_NONE, NULL }, /* Dd */
 150         { ARGSFL_NONE, NULL }, /* Dt */
 151         { ARGSFL_NONE, NULL }, /* Os */
 152         { ARGSFL_NONE, NULL }, /* Sh */
 153         { ARGSFL_NONE, NULL }, /* Ss */
 154         { ARGSFL_NONE, NULL }, /* Pp */
 155         { ARGSFL_DELIM, NULL }, /* D1 */
 156         { ARGSFL_DELIM, NULL }, /* Dl */
 157         { ARGSFL_NONE, args_Bd }, /* Bd */
 158         { ARGSFL_NONE, NULL }, /* Ed */
 159         { ARGSFL_NONE, args_Bl }, /* Bl */
 160         { ARGSFL_NONE, NULL }, /* El */
 161         { ARGSFL_NONE, NULL }, /* It */
 162         { ARGSFL_DELIM, NULL }, /* Ad */
 163         { ARGSFL_DELIM, args_An }, /* An */
 164         { ARGSFL_DELIM, NULL }, /* Ar */
 165         { ARGSFL_DELIM, NULL }, /* Cd */
 166         { ARGSFL_DELIM, NULL }, /* Cm */
 167         { ARGSFL_DELIM, NULL }, /* Dv */
 168         { ARGSFL_DELIM, NULL }, /* Er */
 169         { ARGSFL_DELIM, NULL }, /* Ev */
 170         { ARGSFL_NONE, args_Ex }, /* Ex */
 171         { ARGSFL_DELIM, NULL }, /* Fa */
 172         { ARGSFL_NONE, NULL }, /* Fd */
 173         { ARGSFL_DELIM, NULL }, /* Fl */
 174         { ARGSFL_DELIM, NULL }, /* Fn */
 175         { ARGSFL_DELIM, NULL }, /* Ft */
 176         { ARGSFL_DELIM, NULL }, /* Ic */
 177         { ARGSFL_DELIM, NULL }, /* In */
 178         { ARGSFL_DELIM, NULL }, /* Li */
 179         { ARGSFL_NONE, NULL }, /* Nd */
 180         { ARGSFL_DELIM, NULL }, /* Nm */
 181         { ARGSFL_DELIM, NULL }, /* Op */
 182         { ARGSFL_NONE, NULL }, /* Ot */
 183         { ARGSFL_DELIM, NULL }, /* Pa */
 184         { ARGSFL_NONE, args_Ex }, /* Rv */
 185         { ARGSFL_DELIM, NULL }, /* St */
 186         { ARGSFL_DELIM, NULL }, /* Va */
 187         { ARGSFL_DELIM, NULL }, /* Vt */
 188         { ARGSFL_DELIM, NULL }, /* Xr */
 189         { ARGSFL_NONE, NULL }, /* %A */
 190         { ARGSFL_NONE, NULL }, /* %B */
 191         { ARGSFL_NONE, NULL }, /* %D */
 192         { ARGSFL_NONE, NULL }, /* %I */
 193         { ARGSFL_NONE, NULL }, /* %J */
 194         { ARGSFL_NONE, NULL }, /* %N */
 195         { ARGSFL_NONE, NULL }, /* %O */
 196         { ARGSFL_NONE, NULL }, /* %P */
 197         { ARGSFL_NONE, NULL }, /* %R */
 198         { ARGSFL_NONE, NULL }, /* %T */
 199         { ARGSFL_NONE, NULL }, /* %V */
 200         { ARGSFL_DELIM, NULL }, /* Ac */
 201         { ARGSFL_NONE, NULL }, /* Ao */
 202         { ARGSFL_DELIM, NULL }, /* Aq */
 203         { ARGSFL_DELIM, NULL }, /* At */
 204         { ARGSFL_DELIM, NULL }, /* Bc */
 205         { ARGSFL_NONE, args_Bf }, /* Bf */
 206         { ARGSFL_NONE, NULL }, /* Bo */
 207         { ARGSFL_DELIM, NULL }, /* Bq */
 208         { ARGSFL_DELIM, NULL }, /* Bsx */
 209         { ARGSFL_DELIM, NULL }, /* Bx */
 210         { ARGSFL_NONE, NULL }, /* Db */
 211         { ARGSFL_DELIM, NULL }, /* Dc */
 212         { ARGSFL_NONE, NULL }, /* Do */
 213         { ARGSFL_DELIM, NULL }, /* Dq */
 214         { ARGSFL_DELIM, NULL }, /* Ec */
 215         { ARGSFL_NONE, NULL }, /* Ef */
 216         { ARGSFL_DELIM, NULL }, /* Em */
 217         { ARGSFL_NONE, NULL }, /* Eo */
 218         { ARGSFL_DELIM, NULL }, /* Fx */
 219         { ARGSFL_DELIM, NULL }, /* Ms */
 220         { ARGSFL_DELIM, NULL }, /* No */
 221         { ARGSFL_DELIM, NULL }, /* Ns */
 222         { ARGSFL_DELIM, NULL }, /* Nx */
 223         { ARGSFL_DELIM, NULL }, /* Ox */
 224         { ARGSFL_DELIM, NULL }, /* Pc */
 225         { ARGSFL_DELIM, NULL }, /* Pf */
 226         { ARGSFL_NONE, NULL }, /* Po */
 227         { ARGSFL_DELIM, NULL }, /* Pq */
 228         { ARGSFL_DELIM, NULL }, /* Qc */
 229         { ARGSFL_DELIM, NULL }, /* Ql */
 230         { ARGSFL_NONE, NULL }, /* Qo */
 231         { ARGSFL_DELIM, NULL }, /* Qq */
 232         { ARGSFL_NONE, NULL }, /* Re */
 233         { ARGSFL_NONE, NULL }, /* Rs */
 234         { ARGSFL_DELIM, NULL }, /* Sc */
 235         { ARGSFL_NONE, NULL }, /* So */
 236         { ARGSFL_DELIM, NULL }, /* Sq */
 237         { ARGSFL_NONE, NULL }, /* Sm */
 238         { ARGSFL_DELIM, NULL }, /* Sx */
 239         { ARGSFL_DELIM, NULL }, /* Sy */
 240         { ARGSFL_DELIM, NULL }, /* Tn */
 241         { ARGSFL_DELIM, NULL }, /* Ux */
 242         { ARGSFL_DELIM, NULL }, /* Xc */
 243         { ARGSFL_NONE, NULL }, /* Xo */
 244         { ARGSFL_NONE, NULL }, /* Fo */
 245         { ARGSFL_DELIM, NULL }, /* Fc */
 246         { ARGSFL_NONE, NULL }, /* Oo */
 247         { ARGSFL_DELIM, NULL }, /* Oc */
 248         { ARGSFL_NONE, args_Bk }, /* Bk */
 249         { ARGSFL_NONE, NULL }, /* Ek */
 250         { ARGSFL_NONE, NULL }, /* Bt */
 251         { ARGSFL_NONE, NULL }, /* Hf */
 252         { ARGSFL_NONE, NULL }, /* Fr */
 253         { ARGSFL_NONE, NULL }, /* Ud */
 254         { ARGSFL_DELIM, NULL }, /* Lb */
 255         { ARGSFL_NONE, NULL }, /* Lp */
 256         { ARGSFL_DELIM, NULL }, /* Lk */
 257         { ARGSFL_DELIM, NULL }, /* Mt */
 258         { ARGSFL_DELIM, NULL }, /* Brq */
 259         { ARGSFL_NONE, NULL }, /* Bro */
 260         { ARGSFL_DELIM, NULL }, /* Brc */
 261         { ARGSFL_NONE, NULL }, /* %C */
 262         { ARGSFL_NONE, NULL }, /* Es */
 263         { ARGSFL_NONE, NULL }, /* En */
 264         { ARGSFL_DELIM, NULL }, /* Dx */
 265         { ARGSFL_NONE, NULL }, /* %Q */
 266         { ARGSFL_NONE, NULL }, /* br */
 267         { ARGSFL_NONE, NULL }, /* sp */
 268         { ARGSFL_NONE, NULL }, /* %U */
 269         { ARGSFL_NONE, NULL }, /* Ta */
 270         { ARGSFL_NONE, NULL }, /* ll */
 271 };
 272
 273
 274 /*
 275  * Parse an argument from line text.  This comes in the form of -key
 276  * [value0...], which may either have a single mandatory value, at least
 277  * one mandatory value, an optional single value, or no value.
 278  */
 279 enum margverr
 280 mdoc_argv(struct mdoc *mdoc, int line, enum mdoct tok,
 281                 struct mdoc_arg **v, int *pos, char *buf)
 282 {
 283         char             *p, sv;
 284         struct mdoc_argv tmp;
 285         struct mdoc_arg  *arg;
 286         const enum mdocargt *ap;
 287
 288         if ('\0' == buf[*pos])
 289                 return(ARGV_EOLN);
 290         else if (NULL == (ap = mdocargs[tok].argvs))
 291                 return(ARGV_WORD);
 292         else if ('-' != buf[*pos])
 293                 return(ARGV_WORD);
 294
 295         /* Seek to the first unescaped space. */
 296
 297         p = &buf[++(*pos)];
 298
 299         assert(*pos > 0);
 300
 301         for ( ; buf[*pos] ; (*pos)++)
 302                 if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
 303                         break;
 304
 305         /*
 306          * We want to nil-terminate the word to look it up (it's easier
 307          * that way).  But we may not have a flag, in which case we need
 308          * to restore the line as-is.  So keep around the stray byte,
 309          * which we'll reset upon exiting (if necessary).
 310          */
 311
 312         if ('\0' != (sv = buf[*pos]))
 313                 buf[(*pos)++] = '\0';
 314
 315         /*
 316          * Now look up the word as a flag.  Use temporary storage that
 317          * we'll copy into the node's flags, if necessary.
 318          */
 319
 320         memset(&tmp, 0, sizeof(struct mdoc_argv));
 321
 322         tmp.line = line;
 323         tmp.pos = *pos;
 324         tmp.arg = MDOC_ARG_MAX;
 325
 326         while (MDOC_ARG_MAX != (tmp.arg = *ap++))
 327                 if (0 == strcmp(p, mdoc_argnames[tmp.arg]))
 328                         break;
 329
 330         if (MDOC_ARG_MAX == tmp.arg) {
 331                 /*
 332                  * The flag was not found.
 333                  * Restore saved zeroed byte and return as a word.
 334                  */
 335                 if (sv)
 336                         buf[*pos - 1] = sv;
 337                 return(ARGV_WORD);
 338         }
 339
 340         /* Read to the next word (the argument). */
 341
 342         while (buf[*pos] && ' ' == buf[*pos])
 343                 (*pos)++;
 344
 345         switch (argvflags[tmp.arg]) {
 346         case (ARGV_SINGLE):
 347                 if ( ! argv_single(mdoc, line, &tmp, pos, buf))
 348                         return(ARGV_ERROR);
 349                 break;
 350         case (ARGV_MULTI):
 351                 if ( ! argv_multi(mdoc, line, &tmp, pos, buf))
 352                         return(ARGV_ERROR);
 353                 break;
 354         case (ARGV_NONE):
 355                 break;
 356         }
 357
 358         if (NULL == (arg = *v))
 359                 arg = *v = mandoc_calloc(1, sizeof(struct mdoc_arg));
 360
 361         arg->argc++;
 362         arg->argv = mandoc_realloc
 363                 (arg->argv, arg->argc * sizeof(struct mdoc_argv));
 364
 365         memcpy(&arg->argv[(int)arg->argc - 1],
 366                         &tmp, sizeof(struct mdoc_argv));
 367
 368         return(ARGV_ARG);
 369 }
 370
 371 void
 372 mdoc_argv_free(struct mdoc_arg *p)
 373 {
 374         int              i;
 375
 376         if (NULL == p)
 377                 return;
 378
 379         if (p->refcnt) {
 380                 --(p->refcnt);
 381                 if (p->refcnt)
 382                         return;
 383         }
 384         assert(p->argc);
 385
 386         for (i = (int)p->argc - 1; i >= 0; i--)
 387                 argn_free(p, i);
 388
 389         free(p->argv);
 390         free(p);
 391 }
 392
 393 static void
 394 argn_free(struct mdoc_arg *p, int iarg)
 395 {
 396         struct mdoc_argv *arg;
 397         int               j;
 398
 399         arg = &p->argv[iarg];
 400
 401         if (arg->sz && arg->value) {
 402                 for (j = (int)arg->sz - 1; j >= 0; j--)
 403                         free(arg->value[j]);
 404                 free(arg->value);
 405         }
 406
 407         for (--p->argc; iarg < (int)p->argc; iarg++)
 408                 p->argv[iarg] = p->argv[iarg+1];
 409 }
 410
 411 enum margserr
 412 mdoc_zargs(struct mdoc *mdoc, int line, int *pos, char *buf, char **v)
 413 {
 414
 415         return(args(mdoc, line, pos, buf, ARGSFL_NONE, v));
 416 }
 417
 418 enum margserr
 419 mdoc_args(struct mdoc *mdoc, int line, int *pos,
 420                 char *buf, enum mdoct tok, char **v)
 421 {
 422         enum argsflag     fl;
 423         struct mdoc_node *n;
 424
 425         fl = mdocargs[tok].flags;
 426
 427         if (MDOC_It != tok)
 428                 return(args(mdoc, line, pos, buf, fl, v));
 429
 430         /*
 431          * We know that we're in an `It', so it's reasonable to expect
 432          * us to be sitting in a `Bl'.  Someday this may not be the case
 433          * (if we allow random `It's sitting out there), so provide a
 434          * safe fall-back into the default behaviour.
 435          */
 436
 437         for (n = mdoc->last; n; n = n->parent)
 438                 if (MDOC_Bl == n->tok)
 439                         if (LIST_column == n->norm->Bl.type) {
 440                                 fl = ARGSFL_TABSEP;
 441                                 break;
 442                         }
 443
 444         return(args(mdoc, line, pos, buf, fl, v));
 445 }
 446
 447 static enum margserr
 448 args(struct mdoc *mdoc, int line, int *pos,
 449                 char *buf, enum argsflag fl, char **v)
 450 {
 451         char            *p, *pp;
 452         int              pairs;
 453         enum margserr    rc;
 454
 455         if ('\0' == buf[*pos]) {
 456                 if (MDOC_PPHRASE & mdoc->flags)
 457                         return(ARGS_EOLN);
 458                 /*
 459                  * If we're not in a partial phrase and the flag for
 460                  * being a phrase literal is still set, the punctuation
 461                  * is unterminated.
 462                  */
 463                 if (MDOC_PHRASELIT & mdoc->flags)
 464                         mdoc_pmsg(mdoc, line, *pos, MANDOCERR_BADQUOTE);
 465
 466                 mdoc->flags &= ~MDOC_PHRASELIT;
 467                 return(ARGS_EOLN);
 468         }
 469
 470         *v = &buf[*pos];
 471
 472         if (ARGSFL_DELIM == fl)
 473                 if (args_checkpunct(buf, *pos))
 474                         return(ARGS_PUNCT);
 475
 476         /*
 477          * First handle TABSEP items, restricted to `Bl -column'.  This
 478          * ignores conventional token parsing and instead uses tabs or
 479          * `Ta' macros to separate phrases.  Phrases are parsed again
 480          * for arguments at a later phase.
 481          */
 482
 483         if (ARGSFL_TABSEP == fl) {
 484                 /* Scan ahead to tab (can't be escaped). */
 485                 p = strchr(*v, '\t');
 486                 pp = NULL;
 487
 488                 /* Scan ahead to unescaped `Ta'. */
 489                 if ( ! (MDOC_PHRASELIT & mdoc->flags))
 490                         for (pp = *v; ; pp++) {
 491                                 if (NULL == (pp = strstr(pp, "Ta")))
 492                                         break;
 493                                 if (pp > *v && ' ' != *(pp - 1))
 494                                         continue;
 495                                 if (' ' == *(pp + 2) || '\0' == *(pp + 2))
 496                                         break;
 497                         }
 498
 499                 /* By default, assume a phrase. */
 500                 rc = ARGS_PHRASE;
 501
 502                 /*
 503                  * Adjust new-buffer position to be beyond delimiter
 504                  * mark (e.g., Ta -> end + 2).
 505                  */
 506                 if (p && pp) {
 507                         *pos += pp < p ? 2 : 1;
 508                         rc = pp < p ? ARGS_PHRASE : ARGS_PPHRASE;
 509                         p = pp < p ? pp : p;
 510                 } else if (p && ! pp) {
 511                         rc = ARGS_PPHRASE;
 512                         *pos += 1;
 513                 } else if (pp && ! p) {
 514                         p = pp;
 515                         *pos += 2;
 516                 } else {
 517                         rc = ARGS_PEND;
 518                         p = strchr(*v, 0);
 519                 }
 520
 521                 /* Whitespace check for eoln case... */
 522                 if ('\0' == *p && ' ' == *(p - 1))
 523                         mdoc_pmsg(mdoc, line, *pos, MANDOCERR_EOLNSPACE);
 524
 525                 *pos += (int)(p - *v);
 526
 527                 /* Strip delimiter's preceding whitespace. */
 528                 pp = p - 1;
 529                 while (pp > *v && ' ' == *pp) {
 530                         if (pp > *v && '\\' == *(pp - 1))
 531                                 break;
 532                         pp--;
 533                 }
 534                 *(pp + 1) = 0;
 535
 536                 /* Strip delimiter's proceeding whitespace. */
 537                 for (pp = &buf[*pos]; ' ' == *pp; pp++, (*pos)++)
 538                         /* Skip ahead. */ ;
 539
 540                 return(rc);
 541         }
 542
 543         /*
 544          * Process a quoted literal.  A quote begins with a double-quote
 545          * and ends with a double-quote NOT preceded by a double-quote.
 546          * NUL-terminate the literal in place.
 547          * Collapse pairs of quotes inside quoted literals.
 548          * Whitespace is NOT involved in literal termination.
 549          */
 550
 551         if (MDOC_PHRASELIT & mdoc->flags || '\"' == buf[*pos]) {
 552                 if ( ! (MDOC_PHRASELIT & mdoc->flags))
 553                         *v = &buf[++(*pos)];
 554
 555                 if (MDOC_PPHRASE & mdoc->flags)
 556                         mdoc->flags |= MDOC_PHRASELIT;
 557
 558                 pairs = 0;
 559                 for ( ; buf[*pos]; (*pos)++) {
 560                         /* Move following text left after quoted quotes. */
 561                         if (pairs)
 562                                 buf[*pos - pairs] = buf[*pos];
 563                         if ('\"' != buf[*pos])
 564                                 continue;
 565                         /* Unquoted quotes end quoted args. */
 566                         if ('\"' != buf[*pos + 1])
 567                                 break;
 568                         /* Quoted quotes collapse. */
 569                         pairs++;
 570                         (*pos)++;
 571                 }
 572                 if (pairs)
 573                         buf[*pos - pairs] = '\0';
 574
 575                 if ('\0' == buf[*pos]) {
 576                         if (MDOC_PPHRASE & mdoc->flags)
 577                                 return(ARGS_QWORD);
 578                         mdoc_pmsg(mdoc, line, *pos, MANDOCERR_BADQUOTE);
 579                         return(ARGS_QWORD);
 580                 }
 581
 582                 mdoc->flags &= ~MDOC_PHRASELIT;
 583                 buf[(*pos)++] = '\0';
 584
 585                 if ('\0' == buf[*pos])
 586                         return(ARGS_QWORD);
 587
 588                 while (' ' == buf[*pos])
 589                         (*pos)++;
 590
 591                 if ('\0' == buf[*pos])
 592                         mdoc_pmsg(mdoc, line, *pos, MANDOCERR_EOLNSPACE);
 593
 594                 return(ARGS_QWORD);
 595         }
 596
 597         p = &buf[*pos];
 598         *v = mandoc_getarg(mdoc->parse, &p, line, pos);
 599
 600         return(ARGS_WORD);
 601 }
 602
 603 /*
 604  * Check if the string consists only of space-separated closing
 605  * delimiters.  This is a bit of a dance: the first must be a close
 606  * delimiter, but it may be followed by middle delimiters.  Arbitrary
 607  * whitespace may separate these tokens.
 608  */
 609 static int
 610 args_checkpunct(const char *buf, int i)
 611 {
 612         int              j;
 613         char             dbuf[DELIMSZ];
 614         enum mdelim      d;
 615
 616         /* First token must be a close-delimiter. */
 617
 618         for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
 619                 dbuf[j] = buf[i];
 620
 621         if (DELIMSZ == j)
 622                 return(0);
 623
 624         dbuf[j] = '\0';
 625         if (DELIM_CLOSE != mdoc_isdelim(dbuf))
 626                 return(0);
 627
 628         while (' ' == buf[i])
 629                 i++;
 630
 631         /* Remaining must NOT be open/none. */
 632
 633         while (buf[i]) {
 634                 j = 0;
 635                 while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
 636                         dbuf[j++] = buf[i++];
 637
 638                 if (DELIMSZ == j)
 639                         return(0);
 640
 641                 dbuf[j] = '\0';
 642                 d = mdoc_isdelim(dbuf);
 643                 if (DELIM_NONE == d || DELIM_OPEN == d)
 644                         return(0);
 645
 646                 while (' ' == buf[i])
 647                         i++;
 648         }
 649
 650         return('\0' == buf[i]);
 651 }
 652
 653 static int
 654 argv_multi(struct mdoc *mdoc, int line,
 655                 struct mdoc_argv *v, int *pos, char *buf)
 656 {
 657         enum margserr    ac;
 658         char            *p;
 659
 660         for (v->sz = 0; ; v->sz++) {
 661                 if ('-' == buf[*pos])
 662                         break;
 663                 ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
 664                 if (ARGS_ERROR == ac)
 665                         return(0);
 666                 else if (ARGS_EOLN == ac)
 667                         break;
 668
 669                 if (0 == v->sz % MULTI_STEP)
 670                         v->value = mandoc_realloc(v->value,
 671                                 (v->sz + MULTI_STEP) * sizeof(char *));
 672
 673                 v->value[(int)v->sz] = mandoc_strdup(p);
 674         }
 675
 676         return(1);
 677 }
 678
 679 static int
 680 argv_single(struct mdoc *mdoc, int line,
 681                 struct mdoc_argv *v, int *pos, char *buf)
 682 {
 683         enum margserr    ac;
 684         char            *p;
 685
 686         ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
 687         if (ARGS_ERROR == ac)
 688                 return(0);
 689         if (ARGS_EOLN == ac)
 690                 return(1);
 691
 692         v->sz = 1;
 693         v->value = mandoc_malloc(sizeof(char *));
 694         v->value[0] = mandoc_strdup(p);
 695
 696         return(1);
 697 }