mdoc_argv.c

   1 /*      $Id: mdoc_argv.c,v 1.104 2015/04/19 14:00:19 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2012, 2014, 2015 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 AUTHORS DISCLAIM ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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 #include "config.h"
  19
  20 #include <sys/types.h>
  21
  22 #include <assert.h>
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "mandoc_aux.h"
  28 #include "mandoc.h"
  29 #include "roff.h"
  30 #include "mdoc.h"
  31 #include "libmandoc.h"
  32 #include "libmdoc.h"
  33
  34 #define MULTI_STEP       5 /* pre-allocate argument values */
  35 #define DELIMSZ          6 /* max possible size of a delimiter */
  36
  37 enum    argsflag {
  38         ARGSFL_NONE = 0,
  39         ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
  40         ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
  41 };
  42
  43 enum    argvflag {
  44         ARGV_NONE, /* no args to flag (e.g., -split) */
  45         ARGV_SINGLE, /* one arg to flag (e.g., -file xxx)  */
  46         ARGV_MULTI /* multiple args (e.g., -column xxx yyy) */
  47 };
  48
  49 struct  mdocarg {
  50         enum argsflag    flags;
  51         const enum mdocargt *argvs;
  52 };
  53
  54 static  void             argn_free(struct mdoc_arg *, int);
  55 static  enum margserr    args(struct roff_man *, int, int *,
  56                                 char *, enum argsflag, char **);
  57 static  int              args_checkpunct(const char *, int);
  58 static  void             argv_multi(struct roff_man *, int,
  59                                 struct mdoc_argv *, int *, char *);
  60 static  void             argv_single(struct roff_man *, int,
  61                                 struct mdoc_argv *, int *, char *);
  62
  63 static  const enum argvflag argvflags[MDOC_ARG_MAX] = {
  64         ARGV_NONE,      /* MDOC_Split */
  65         ARGV_NONE,      /* MDOC_Nosplit */
  66         ARGV_NONE,      /* MDOC_Ragged */
  67         ARGV_NONE,      /* MDOC_Unfilled */
  68         ARGV_NONE,      /* MDOC_Literal */
  69         ARGV_SINGLE,    /* MDOC_File */
  70         ARGV_SINGLE,    /* MDOC_Offset */
  71         ARGV_NONE,      /* MDOC_Bullet */
  72         ARGV_NONE,      /* MDOC_Dash */
  73         ARGV_NONE,      /* MDOC_Hyphen */
  74         ARGV_NONE,      /* MDOC_Item */
  75         ARGV_NONE,      /* MDOC_Enum */
  76         ARGV_NONE,      /* MDOC_Tag */
  77         ARGV_NONE,      /* MDOC_Diag */
  78         ARGV_NONE,      /* MDOC_Hang */
  79         ARGV_NONE,      /* MDOC_Ohang */
  80         ARGV_NONE,      /* MDOC_Inset */
  81         ARGV_MULTI,     /* MDOC_Column */
  82         ARGV_SINGLE,    /* MDOC_Width */
  83         ARGV_NONE,      /* MDOC_Compact */
  84         ARGV_NONE,      /* MDOC_Std */
  85         ARGV_NONE,      /* MDOC_Filled */
  86         ARGV_NONE,      /* MDOC_Words */
  87         ARGV_NONE,      /* MDOC_Emphasis */
  88         ARGV_NONE,      /* MDOC_Symbolic */
  89         ARGV_NONE       /* MDOC_Symbolic */
  90 };
  91
  92 static  const enum mdocargt args_Ex[] = {
  93         MDOC_Std,
  94         MDOC_ARG_MAX
  95 };
  96
  97 static  const enum mdocargt args_An[] = {
  98         MDOC_Split,
  99         MDOC_Nosplit,
 100         MDOC_ARG_MAX
 101 };
 102
 103 static  const enum mdocargt args_Bd[] = {
 104         MDOC_Ragged,
 105         MDOC_Unfilled,
 106         MDOC_Filled,
 107         MDOC_Literal,
 108         MDOC_File,
 109         MDOC_Offset,
 110         MDOC_Compact,
 111         MDOC_Centred,
 112         MDOC_ARG_MAX
 113 };
 114
 115 static  const enum mdocargt args_Bf[] = {
 116         MDOC_Emphasis,
 117         MDOC_Literal,
 118         MDOC_Symbolic,
 119         MDOC_ARG_MAX
 120 };
 121
 122 static  const enum mdocargt args_Bk[] = {
 123         MDOC_Words,
 124         MDOC_ARG_MAX
 125 };
 126
 127 static  const enum mdocargt args_Bl[] = {
 128         MDOC_Bullet,
 129         MDOC_Dash,
 130         MDOC_Hyphen,
 131         MDOC_Item,
 132         MDOC_Enum,
 133         MDOC_Tag,
 134         MDOC_Diag,
 135         MDOC_Hang,
 136         MDOC_Ohang,
 137         MDOC_Inset,
 138         MDOC_Column,
 139         MDOC_Width,
 140         MDOC_Offset,
 141         MDOC_Compact,
 142         MDOC_Nested,
 143         MDOC_ARG_MAX
 144 };
 145
 146 static  const struct mdocarg mdocargs[MDOC_MAX] = {
 147         { ARGSFL_DELIM, NULL }, /* Ap */
 148         { ARGSFL_NONE, NULL }, /* Dd */
 149         { ARGSFL_NONE, NULL }, /* Dt */
 150         { ARGSFL_NONE, NULL }, /* Os */
 151         { ARGSFL_NONE, NULL }, /* Sh */
 152         { ARGSFL_NONE, NULL }, /* Ss */
 153         { ARGSFL_NONE, NULL }, /* Pp */
 154         { ARGSFL_DELIM, NULL }, /* D1 */
 155         { ARGSFL_DELIM, NULL }, /* Dl */
 156         { ARGSFL_NONE, args_Bd }, /* Bd */
 157         { ARGSFL_NONE, NULL }, /* Ed */
 158         { ARGSFL_NONE, args_Bl }, /* Bl */
 159         { ARGSFL_NONE, NULL }, /* El */
 160         { ARGSFL_NONE, NULL }, /* It */
 161         { ARGSFL_DELIM, NULL }, /* Ad */
 162         { ARGSFL_DELIM, args_An }, /* An */
 163         { ARGSFL_DELIM, NULL }, /* Ar */
 164         { ARGSFL_DELIM, NULL }, /* Cd */
 165         { ARGSFL_DELIM, NULL }, /* Cm */
 166         { ARGSFL_DELIM, NULL }, /* Dv */
 167         { ARGSFL_DELIM, NULL }, /* Er */
 168         { ARGSFL_DELIM, NULL }, /* Ev */
 169         { ARGSFL_NONE, args_Ex }, /* Ex */
 170         { ARGSFL_DELIM, NULL }, /* Fa */
 171         { ARGSFL_NONE, NULL }, /* Fd */
 172         { ARGSFL_DELIM, NULL }, /* Fl */
 173         { ARGSFL_DELIM, NULL }, /* Fn */
 174         { ARGSFL_DELIM, NULL }, /* Ft */
 175         { ARGSFL_DELIM, NULL }, /* Ic */
 176         { ARGSFL_DELIM, NULL }, /* In */
 177         { ARGSFL_DELIM, NULL }, /* Li */
 178         { ARGSFL_NONE, NULL }, /* Nd */
 179         { ARGSFL_DELIM, NULL }, /* Nm */
 180         { ARGSFL_DELIM, NULL }, /* Op */
 181         { ARGSFL_DELIM, NULL }, /* Ot */
 182         { ARGSFL_DELIM, NULL }, /* Pa */
 183         { ARGSFL_NONE, args_Ex }, /* Rv */
 184         { ARGSFL_DELIM, NULL }, /* St */
 185         { ARGSFL_DELIM, NULL }, /* Va */
 186         { ARGSFL_DELIM, NULL }, /* Vt */
 187         { ARGSFL_DELIM, NULL }, /* Xr */
 188         { ARGSFL_NONE, NULL }, /* %A */
 189         { ARGSFL_NONE, NULL }, /* %B */
 190         { ARGSFL_NONE, NULL }, /* %D */
 191         { ARGSFL_NONE, NULL }, /* %I */
 192         { ARGSFL_NONE, NULL }, /* %J */
 193         { ARGSFL_NONE, NULL }, /* %N */
 194         { ARGSFL_NONE, NULL }, /* %O */
 195         { ARGSFL_NONE, NULL }, /* %P */
 196         { ARGSFL_NONE, NULL }, /* %R */
 197         { ARGSFL_NONE, NULL }, /* %T */
 198         { ARGSFL_NONE, NULL }, /* %V */
 199         { ARGSFL_DELIM, NULL }, /* Ac */
 200         { ARGSFL_NONE, NULL }, /* Ao */
 201         { ARGSFL_DELIM, NULL }, /* Aq */
 202         { ARGSFL_DELIM, NULL }, /* At */
 203         { ARGSFL_DELIM, NULL }, /* Bc */
 204         { ARGSFL_NONE, args_Bf }, /* Bf */
 205         { ARGSFL_NONE, NULL }, /* Bo */
 206         { ARGSFL_DELIM, NULL }, /* Bq */
 207         { ARGSFL_DELIM, NULL }, /* Bsx */
 208         { ARGSFL_DELIM, NULL }, /* Bx */
 209         { ARGSFL_NONE, NULL }, /* Db */
 210         { ARGSFL_DELIM, NULL }, /* Dc */
 211         { ARGSFL_NONE, NULL }, /* Do */
 212         { ARGSFL_DELIM, NULL }, /* Dq */
 213         { ARGSFL_DELIM, NULL }, /* Ec */
 214         { ARGSFL_NONE, NULL }, /* Ef */
 215         { ARGSFL_DELIM, NULL }, /* Em */
 216         { ARGSFL_NONE, NULL }, /* Eo */
 217         { ARGSFL_DELIM, NULL }, /* Fx */
 218         { ARGSFL_DELIM, NULL }, /* Ms */
 219         { ARGSFL_DELIM, NULL }, /* No */
 220         { ARGSFL_DELIM, NULL }, /* Ns */
 221         { ARGSFL_DELIM, NULL }, /* Nx */
 222         { ARGSFL_DELIM, NULL }, /* Ox */
 223         { ARGSFL_DELIM, NULL }, /* Pc */
 224         { ARGSFL_DELIM, NULL }, /* Pf */
 225         { ARGSFL_NONE, NULL }, /* Po */
 226         { ARGSFL_DELIM, NULL }, /* Pq */
 227         { ARGSFL_DELIM, NULL }, /* Qc */
 228         { ARGSFL_DELIM, NULL }, /* Ql */
 229         { ARGSFL_NONE, NULL }, /* Qo */
 230         { ARGSFL_DELIM, NULL }, /* Qq */
 231         { ARGSFL_NONE, NULL }, /* Re */
 232         { ARGSFL_NONE, NULL }, /* Rs */
 233         { ARGSFL_DELIM, NULL }, /* Sc */
 234         { ARGSFL_NONE, NULL }, /* So */
 235         { ARGSFL_DELIM, NULL }, /* Sq */
 236         { ARGSFL_NONE, NULL }, /* Sm */
 237         { ARGSFL_DELIM, NULL }, /* Sx */
 238         { ARGSFL_DELIM, NULL }, /* Sy */
 239         { ARGSFL_DELIM, NULL }, /* Tn */
 240         { ARGSFL_DELIM, NULL }, /* Ux */
 241         { ARGSFL_DELIM, NULL }, /* Xc */
 242         { ARGSFL_NONE, NULL }, /* Xo */
 243         { ARGSFL_NONE, NULL }, /* Fo */
 244         { ARGSFL_DELIM, NULL }, /* Fc */
 245         { ARGSFL_NONE, NULL }, /* Oo */
 246         { ARGSFL_DELIM, NULL }, /* Oc */
 247         { ARGSFL_NONE, args_Bk }, /* Bk */
 248         { ARGSFL_NONE, NULL }, /* Ek */
 249         { ARGSFL_NONE, NULL }, /* Bt */
 250         { ARGSFL_NONE, NULL }, /* Hf */
 251         { ARGSFL_DELIM, NULL }, /* Fr */
 252         { ARGSFL_NONE, NULL }, /* Ud */
 253         { ARGSFL_DELIM, NULL }, /* Lb */
 254         { ARGSFL_NONE, NULL }, /* Lp */
 255         { ARGSFL_DELIM, NULL }, /* Lk */
 256         { ARGSFL_DELIM, NULL }, /* Mt */
 257         { ARGSFL_DELIM, NULL }, /* Brq */
 258         { ARGSFL_NONE, NULL }, /* Bro */
 259         { ARGSFL_DELIM, NULL }, /* Brc */
 260         { ARGSFL_NONE, NULL }, /* %C */
 261         { ARGSFL_NONE, NULL }, /* Es */
 262         { ARGSFL_DELIM, NULL }, /* En */
 263         { ARGSFL_DELIM, NULL }, /* Dx */
 264         { ARGSFL_NONE, NULL }, /* %Q */
 265         { ARGSFL_NONE, NULL }, /* br */
 266         { ARGSFL_NONE, NULL }, /* sp */
 267         { ARGSFL_NONE, NULL }, /* %U */
 268         { ARGSFL_NONE, NULL }, /* Ta */
 269         { ARGSFL_NONE, NULL }, /* ll */
 270 };
 271
 272
 273 /*
 274  * Parse flags and their arguments from the input line.
 275  * These come in the form -flag [argument ...].
 276  * Some flags take no argument, some one, some multiple.
 277  */
 278 void
 279 mdoc_argv(struct roff_man *mdoc, int line, int tok,
 280         struct mdoc_arg **reta, int *pos, char *buf)
 281 {
 282         struct mdoc_argv          tmpv;
 283         struct mdoc_argv        **retv;
 284         const enum mdocargt      *argtable;
 285         char                     *argname;
 286         int                       ipos, retc;
 287         char                      savechar;
 288
 289         *reta = NULL;
 290
 291         /* Which flags does this macro support? */
 292
 293         argtable = mdocargs[tok].argvs;
 294         if (argtable == NULL)
 295                 return;
 296
 297         /* Loop over the flags on the input line. */
 298
 299         ipos = *pos;
 300         while (buf[ipos] == '-') {
 301
 302                 /* Seek to the first unescaped space. */
 303
 304                 for (argname = buf + ++ipos; buf[ipos] != '\0'; ipos++)
 305                         if (buf[ipos] == ' ' && buf[ipos - 1] != '\\')
 306                                 break;
 307
 308                 /*
 309                  * We want to nil-terminate the word to look it up.
 310                  * But we may not have a flag, in which case we need
 311                  * to restore the line as-is.  So keep around the
 312                  * stray byte, which we'll reset upon exiting.
 313                  */
 314
 315                 if ((savechar = buf[ipos]) != '\0')
 316                         buf[ipos++] = '\0';
 317
 318                 /*
 319                  * Now look up the word as a flag.  Use temporary
 320                  * storage that we'll copy into the node's flags.
 321                  */
 322
 323                 while ((tmpv.arg = *argtable++) != MDOC_ARG_MAX)
 324                         if ( ! strcmp(argname, mdoc_argnames[tmpv.arg]))
 325                                 break;
 326
 327                 /* If it isn't a flag, restore the saved byte. */
 328
 329                 if (tmpv.arg == MDOC_ARG_MAX) {
 330                         if (savechar != '\0')
 331                                 buf[ipos - 1] = savechar;
 332                         break;
 333                 }
 334
 335                 /* Read to the next word (the first argument). */
 336
 337                 while (buf[ipos] == ' ')
 338                         ipos++;
 339
 340                 /* Parse the arguments of the flag. */
 341
 342                 tmpv.line  = line;
 343                 tmpv.pos   = *pos;
 344                 tmpv.sz    = 0;
 345                 tmpv.value = NULL;
 346
 347                 switch (argvflags[tmpv.arg]) {
 348                 case ARGV_SINGLE:
 349                         argv_single(mdoc, line, &tmpv, &ipos, buf);
 350                         break;
 351                 case ARGV_MULTI:
 352                         argv_multi(mdoc, line, &tmpv, &ipos, buf);
 353                         break;
 354                 case ARGV_NONE:
 355                         break;
 356                 }
 357
 358                 /* Append to the return values. */
 359
 360                 if (*reta == NULL)
 361                         *reta = mandoc_calloc(1, sizeof(**reta));
 362
 363                 retc = ++(*reta)->argc;
 364                 retv = &(*reta)->argv;
 365                 *retv = mandoc_reallocarray(*retv, retc, sizeof(**retv));
 366                 memcpy(*retv + retc - 1, &tmpv, sizeof(**retv));
 367
 368                 /* Prepare for parsing the next flag. */
 369
 370                 *pos = ipos;
 371                 argtable = mdocargs[tok].argvs;
 372         }
 373 }
 374
 375 void
 376 mdoc_argv_free(struct mdoc_arg *p)
 377 {
 378         int              i;
 379
 380         if (NULL == p)
 381                 return;
 382
 383         if (p->refcnt) {
 384                 --(p->refcnt);
 385                 if (p->refcnt)
 386                         return;
 387         }
 388         assert(p->argc);
 389
 390         for (i = (int)p->argc - 1; i >= 0; i--)
 391                 argn_free(p, i);
 392
 393         free(p->argv);
 394         free(p);
 395 }
 396
 397 static void
 398 argn_free(struct mdoc_arg *p, int iarg)
 399 {
 400         struct mdoc_argv *arg;
 401         int               j;
 402
 403         arg = &p->argv[iarg];
 404
 405         if (arg->sz && arg->value) {
 406                 for (j = (int)arg->sz - 1; j >= 0; j--)
 407                         free(arg->value[j]);
 408                 free(arg->value);
 409         }
 410
 411         for (--p->argc; iarg < (int)p->argc; iarg++)
 412                 p->argv[iarg] = p->argv[iarg+1];
 413 }
 414
 415 enum margserr
 416 mdoc_args(struct roff_man *mdoc, int line, int *pos,
 417         char *buf, int tok, char **v)
 418 {
 419         struct roff_node *n;
 420         char             *v_local;
 421         enum argsflag     fl;
 422
 423         if (v == NULL)
 424                 v = &v_local;
 425         fl = tok == TOKEN_NONE ? ARGSFL_NONE : mdocargs[tok].flags;
 426         if (tok != MDOC_It)
 427                 return(args(mdoc, line, pos, buf, fl, v));
 428
 429         /*
 430          * We know that we're in an `It', so it's reasonable to expect
 431          * us to be sitting in a `Bl'.  Someday this may not be the case
 432          * (if we allow random `It's sitting out there), so provide a
 433          * safe fall-back into the default behaviour.
 434          */
 435
 436         for (n = mdoc->last; n; n = n->parent)
 437                 if (MDOC_Bl == n->tok)
 438                         if (LIST_column == n->norm->Bl.type) {
 439                                 fl = ARGSFL_TABSEP;
 440                                 break;
 441                         }
 442
 443         return(args(mdoc, line, pos, buf, fl, v));
 444 }
 445
 446 static enum margserr
 447 args(struct roff_man *mdoc, int line, int *pos,
 448                 char *buf, enum argsflag fl, char **v)
 449 {
 450         char            *p, *pp;
 451         int              pairs;
 452         enum margserr    rc;
 453
 454         if ('\0' == buf[*pos]) {
 455                 if (MDOC_PPHRASE & mdoc->flags)
 456                         return(ARGS_EOLN);
 457                 /*
 458                  * If we're not in a partial phrase and the flag for
 459                  * being a phrase literal is still set, the punctuation
 460                  * is unterminated.
 461                  */
 462                 if (MDOC_PHRASELIT & mdoc->flags)
 463                         mandoc_msg(MANDOCERR_ARG_QUOTE,
 464                             mdoc->parse, line, *pos, NULL);
 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                         mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
 524                             line, *pos, NULL);
 525
 526                 *pos += (int)(p - *v);
 527
 528                 /* Strip delimiter's preceding whitespace. */
 529                 pp = p - 1;
 530                 while (pp > *v && ' ' == *pp) {
 531                         if (pp > *v && '\\' == *(pp - 1))
 532                                 break;
 533                         pp--;
 534                 }
 535                 *(pp + 1) = 0;
 536
 537                 /* Strip delimiter's proceeding whitespace. */
 538                 for (pp = &buf[*pos]; ' ' == *pp; pp++, (*pos)++)
 539                         /* Skip ahead. */ ;
 540
 541                 return(rc);
 542         }
 543
 544         /*
 545          * Process a quoted literal.  A quote begins with a double-quote
 546          * and ends with a double-quote NOT preceded by a double-quote.
 547          * NUL-terminate the literal in place.
 548          * Collapse pairs of quotes inside quoted literals.
 549          * Whitespace is NOT involved in literal termination.
 550          */
 551
 552         if (MDOC_PHRASELIT & mdoc->flags || '\"' == buf[*pos]) {
 553                 if ( ! (MDOC_PHRASELIT & mdoc->flags))
 554                         *v = &buf[++(*pos)];
 555
 556                 if (MDOC_PPHRASE & mdoc->flags)
 557                         mdoc->flags |= MDOC_PHRASELIT;
 558
 559                 pairs = 0;
 560                 for ( ; buf[*pos]; (*pos)++) {
 561                         /* Move following text left after quoted quotes. */
 562                         if (pairs)
 563                                 buf[*pos - pairs] = buf[*pos];
 564                         if ('\"' != buf[*pos])
 565                                 continue;
 566                         /* Unquoted quotes end quoted args. */
 567                         if ('\"' != buf[*pos + 1])
 568                                 break;
 569                         /* Quoted quotes collapse. */
 570                         pairs++;
 571                         (*pos)++;
 572                 }
 573                 if (pairs)
 574                         buf[*pos - pairs] = '\0';
 575
 576                 if ('\0' == buf[*pos]) {
 577                         if (MDOC_PPHRASE & mdoc->flags)
 578                                 return(ARGS_QWORD);
 579                         mandoc_msg(MANDOCERR_ARG_QUOTE,
 580                             mdoc->parse, line, *pos, NULL);
 581                         return(ARGS_QWORD);
 582                 }
 583
 584                 mdoc->flags &= ~MDOC_PHRASELIT;
 585                 buf[(*pos)++] = '\0';
 586
 587                 if ('\0' == buf[*pos])
 588                         return(ARGS_QWORD);
 589
 590                 while (' ' == buf[*pos])
 591                         (*pos)++;
 592
 593                 if ('\0' == buf[*pos])
 594                         mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
 595                             line, *pos, NULL);
 596
 597                 return(ARGS_QWORD);
 598         }
 599
 600         p = &buf[*pos];
 601         *v = mandoc_getarg(mdoc->parse, &p, line, pos);
 602
 603         return(ARGS_WORD);
 604 }
 605
 606 /*
 607  * Check if the string consists only of space-separated closing
 608  * delimiters.  This is a bit of a dance: the first must be a close
 609  * delimiter, but it may be followed by middle delimiters.  Arbitrary
 610  * whitespace may separate these tokens.
 611  */
 612 static int
 613 args_checkpunct(const char *buf, int i)
 614 {
 615         int              j;
 616         char             dbuf[DELIMSZ];
 617         enum mdelim      d;
 618
 619         /* First token must be a close-delimiter. */
 620
 621         for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
 622                 dbuf[j] = buf[i];
 623
 624         if (DELIMSZ == j)
 625                 return(0);
 626
 627         dbuf[j] = '\0';
 628         if (DELIM_CLOSE != mdoc_isdelim(dbuf))
 629                 return(0);
 630
 631         while (' ' == buf[i])
 632                 i++;
 633
 634         /* Remaining must NOT be open/none. */
 635
 636         while (buf[i]) {
 637                 j = 0;
 638                 while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
 639                         dbuf[j++] = buf[i++];
 640
 641                 if (DELIMSZ == j)
 642                         return(0);
 643
 644                 dbuf[j] = '\0';
 645                 d = mdoc_isdelim(dbuf);
 646                 if (DELIM_NONE == d || DELIM_OPEN == d)
 647                         return(0);
 648
 649                 while (' ' == buf[i])
 650                         i++;
 651         }
 652
 653         return('\0' == buf[i]);
 654 }
 655
 656 static void
 657 argv_multi(struct roff_man *mdoc, int line,
 658                 struct mdoc_argv *v, int *pos, char *buf)
 659 {
 660         enum margserr    ac;
 661         char            *p;
 662
 663         for (v->sz = 0; ; v->sz++) {
 664                 if (buf[*pos] == '-')
 665                         break;
 666                 ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
 667                 if (ac == ARGS_EOLN)
 668                         break;
 669
 670                 if (v->sz % MULTI_STEP == 0)
 671                         v->value = mandoc_reallocarray(v->value,
 672                             v->sz + MULTI_STEP, sizeof(char *));
 673
 674                 v->value[(int)v->sz] = mandoc_strdup(p);
 675         }
 676 }
 677
 678 static void
 679 argv_single(struct roff_man *mdoc, int line,
 680                 struct mdoc_argv *v, int *pos, char *buf)
 681 {
 682         enum margserr    ac;
 683         char            *p;
 684
 685         ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
 686         if (ac == ARGS_EOLN)
 687                 return;
 688
 689         v->sz = 1;
 690         v->value = mandoc_malloc(sizeof(char *));
 691         v->value[0] = mandoc_strdup(p);
 692 }