external/bsd/mdocml/dist/mdoc_argv.c

   1 /*      Id: mdoc_argv.c,v 1.89 2013/12/25 00:50:05 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 "libmdoc.h"
  32 #include "libmandoc.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 mdoc *, int, int *,
  56                                 char *, enum argsflag, char **);
  57 static  int              args_checkpunct(const char *, int);
  58 static  int              argv_multi(struct mdoc *, int,
  59                                 struct mdoc_argv *, int *, char *);
  60 static  int              argv_single(struct mdoc *, 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_NONE, 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_NONE, 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_NONE, 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 };
 270
 271
 272 /*
 273  * Parse an argument from line text.  This comes in the form of -key
 274  * [value0...], which may either have a single mandatory value, at least
 275  * one mandatory value, an optional single value, or no value.
 276  */
 277 enum margverr
 278 mdoc_argv(struct mdoc *mdoc, int line, enum mdoct tok,
 279                 struct mdoc_arg **v, int *pos, char *buf)
 280 {
 281         char             *p, sv;
 282         struct mdoc_argv tmp;
 283         struct mdoc_arg  *arg;
 284         const enum mdocargt *ap;
 285
 286         if ('\0' == buf[*pos])
 287                 return(ARGV_EOLN);
 288         else if (NULL == (ap = mdocargs[tok].argvs))
 289                 return(ARGV_WORD);
 290         else if ('-' != buf[*pos])
 291                 return(ARGV_WORD);
 292
 293         /* Seek to the first unescaped space. */
 294
 295         p = &buf[++(*pos)];
 296
 297         assert(*pos > 0);
 298
 299         for ( ; buf[*pos] ; (*pos)++)
 300                 if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
 301                         break;
 302
 303         /*
 304          * We want to nil-terminate the word to look it up (it's easier
 305          * that way).  But we may not have a flag, in which case we need
 306          * to restore the line as-is.  So keep around the stray byte,
 307          * which we'll reset upon exiting (if necessary).
 308          */
 309
 310         if ('\0' != (sv = buf[*pos]))
 311                 buf[(*pos)++] = '\0';
 312
 313         /*
 314          * Now look up the word as a flag.  Use temporary storage that
 315          * we'll copy into the node's flags, if necessary.
 316          */
 317
 318         memset(&tmp, 0, sizeof(struct mdoc_argv));
 319
 320         tmp.line = line;
 321         tmp.pos = *pos;
 322         tmp.arg = MDOC_ARG_MAX;
 323
 324         while (MDOC_ARG_MAX != (tmp.arg = *ap++))
 325                 if (0 == strcmp(p, mdoc_argnames[tmp.arg]))
 326                         break;
 327
 328         if (MDOC_ARG_MAX == tmp.arg) {
 329                 /*
 330                  * The flag was not found.
 331                  * Restore saved zeroed byte and return as a word.
 332                  */
 333                 if (sv)
 334                         buf[*pos - 1] = sv;
 335                 return(ARGV_WORD);
 336         }
 337
 338         /* Read to the next word (the argument). */
 339
 340         while (buf[*pos] && ' ' == buf[*pos])
 341                 (*pos)++;
 342
 343         switch (argvflags[tmp.arg]) {
 344         case (ARGV_SINGLE):
 345                 if ( ! argv_single(mdoc, line, &tmp, pos, buf))
 346                         return(ARGV_ERROR);
 347                 break;
 348         case (ARGV_MULTI):
 349                 if ( ! argv_multi(mdoc, line, &tmp, pos, buf))
 350                         return(ARGV_ERROR);
 351                 break;
 352         case (ARGV_NONE):
 353                 break;
 354         }
 355
 356         if (NULL == (arg = *v))
 357                 arg = *v = mandoc_calloc(1, sizeof(struct mdoc_arg));
 358
 359         arg->argc++;
 360         arg->argv = mandoc_realloc
 361                 (arg->argv, arg->argc * sizeof(struct mdoc_argv));
 362
 363         memcpy(&arg->argv[(int)arg->argc - 1],
 364                         &tmp, sizeof(struct mdoc_argv));
 365
 366         return(ARGV_ARG);
 367 }
 368
 369 void
 370 mdoc_argv_free(struct mdoc_arg *p)
 371 {
 372         int              i;
 373
 374         if (NULL == p)
 375                 return;
 376
 377         if (p->refcnt) {
 378                 --(p->refcnt);
 379                 if (p->refcnt)
 380                         return;
 381         }
 382         assert(p->argc);
 383
 384         for (i = (int)p->argc - 1; i >= 0; i--)
 385                 argn_free(p, i);
 386
 387         free(p->argv);
 388         free(p);
 389 }
 390
 391 static void
 392 argn_free(struct mdoc_arg *p, int iarg)
 393 {
 394         struct mdoc_argv *arg;
 395         int               j;
 396
 397         arg = &p->argv[iarg];
 398
 399         if (arg->sz && arg->value) {
 400                 for (j = (int)arg->sz - 1; j >= 0; j--)
 401                         free(arg->value[j]);
 402                 free(arg->value);
 403         }
 404
 405         for (--p->argc; iarg < (int)p->argc; iarg++)
 406                 p->argv[iarg] = p->argv[iarg+1];
 407 }
 408
 409 enum margserr
 410 mdoc_zargs(struct mdoc *mdoc, int line, int *pos, char *buf, char **v)
 411 {
 412
 413         return(args(mdoc, line, pos, buf, ARGSFL_NONE, v));
 414 }
 415
 416 enum margserr
 417 mdoc_args(struct mdoc *mdoc, int line, int *pos,
 418                 char *buf, enum mdoct tok, char **v)
 419 {
 420         enum argsflag     fl;
 421         struct mdoc_node *n;
 422
 423         fl = mdocargs[tok].flags;
 424
 425         if (MDOC_It != tok)
 426                 return(args(mdoc, line, pos, buf, fl, v));
 427
 428         /*
 429          * We know that we're in an `It', so it's reasonable to expect
 430          * us to be sitting in a `Bl'.  Someday this may not be the case
 431          * (if we allow random `It's sitting out there), so provide a
 432          * safe fall-back into the default behaviour.
 433          */
 434
 435         for (n = mdoc->last; n; n = n->parent)
 436                 if (MDOC_Bl == n->tok)
 437                         if (LIST_column == n->norm->Bl.type) {
 438                                 fl = ARGSFL_TABSEP;
 439                                 break;
 440                         }
 441
 442         return(args(mdoc, line, pos, buf, fl, v));
 443 }
 444
 445 static enum margserr
 446 args(struct mdoc *mdoc, int line, int *pos,
 447                 char *buf, enum argsflag fl, char **v)
 448 {
 449         char            *p, *pp;
 450         int              pairs;
 451         enum margserr    rc;
 452
 453         if ('\0' == buf[*pos]) {
 454                 if (MDOC_PPHRASE & mdoc->flags)
 455                         return(ARGS_EOLN);
 456                 /*
 457                  * If we're not in a partial phrase and the flag for
 458                  * being a phrase literal is still set, the punctuation
 459                  * is unterminated.
 460                  */
 461                 if (MDOC_PHRASELIT & mdoc->flags)
 462                         mdoc_pmsg(mdoc, line, *pos, MANDOCERR_BADQUOTE);
 463
 464                 mdoc->flags &= ~MDOC_PHRASELIT;
 465                 return(ARGS_EOLN);
 466         }
 467
 468         *v = &buf[*pos];
 469
 470         if (ARGSFL_DELIM == fl)
 471                 if (args_checkpunct(buf, *pos))
 472                         return(ARGS_PUNCT);
 473
 474         /*
 475          * First handle TABSEP items, restricted to `Bl -column'.  This
 476          * ignores conventional token parsing and instead uses tabs or
 477          * `Ta' macros to separate phrases.  Phrases are parsed again
 478          * for arguments at a later phase.
 479          */
 480
 481         if (ARGSFL_TABSEP == fl) {
 482                 /* Scan ahead to tab (can't be escaped). */
 483                 p = strchr(*v, '\t');
 484                 pp = NULL;
 485
 486                 /* Scan ahead to unescaped `Ta'. */
 487                 if ( ! (MDOC_PHRASELIT & mdoc->flags))
 488                         for (pp = *v; ; pp++) {
 489                                 if (NULL == (pp = strstr(pp, "Ta")))
 490                                         break;
 491                                 if (pp > *v && ' ' != *(pp - 1))
 492                                         continue;
 493                                 if (' ' == *(pp + 2) || '\0' == *(pp + 2))
 494                                         break;
 495                         }
 496
 497                 /* By default, assume a phrase. */
 498                 rc = ARGS_PHRASE;
 499
 500                 /*
 501                  * Adjust new-buffer position to be beyond delimiter
 502                  * mark (e.g., Ta -> end + 2).
 503                  */
 504                 if (p && pp) {
 505                         *pos += pp < p ? 2 : 1;
 506                         rc = pp < p ? ARGS_PHRASE : ARGS_PPHRASE;
 507                         p = pp < p ? pp : p;
 508                 } else if (p && ! pp) {
 509                         rc = ARGS_PPHRASE;
 510                         *pos += 1;
 511                 } else if (pp && ! p) {
 512                         p = pp;
 513                         *pos += 2;
 514                 } else {
 515                         rc = ARGS_PEND;
 516                         p = strchr(*v, 0);
 517                 }
 518
 519                 /* Whitespace check for eoln case... */
 520                 if ('\0' == *p && ' ' == *(p - 1))
 521                         mdoc_pmsg(mdoc, line, *pos, MANDOCERR_EOLNSPACE);
 522
 523                 *pos += (int)(p - *v);
 524
 525                 /* Strip delimiter's preceding whitespace. */
 526                 pp = p - 1;
 527                 while (pp > *v && ' ' == *pp) {
 528                         if (pp > *v && '\\' == *(pp - 1))
 529                                 break;
 530                         pp--;
 531                 }
 532                 *(pp + 1) = 0;
 533
 534                 /* Strip delimiter's proceeding whitespace. */
 535                 for (pp = &buf[*pos]; ' ' == *pp; pp++, (*pos)++)
 536                         /* Skip ahead. */ ;
 537
 538                 return(rc);
 539         }
 540
 541         /*
 542          * Process a quoted literal.  A quote begins with a double-quote
 543          * and ends with a double-quote NOT preceded by a double-quote.
 544          * NUL-terminate the literal in place.
 545          * Collapse pairs of quotes inside quoted literals.
 546          * Whitespace is NOT involved in literal termination.
 547          */
 548
 549         if (MDOC_PHRASELIT & mdoc->flags || '\"' == buf[*pos]) {
 550                 if ( ! (MDOC_PHRASELIT & mdoc->flags))
 551                         *v = &buf[++(*pos)];
 552
 553                 if (MDOC_PPHRASE & mdoc->flags)
 554                         mdoc->flags |= MDOC_PHRASELIT;
 555
 556                 pairs = 0;
 557                 for ( ; buf[*pos]; (*pos)++) {
 558                         /* Move following text left after quoted quotes. */
 559                         if (pairs)
 560                                 buf[*pos - pairs] = buf[*pos];
 561                         if ('\"' != buf[*pos])
 562                                 continue;
 563                         /* Unquoted quotes end quoted args. */
 564                         if ('\"' != buf[*pos + 1])
 565                                 break;
 566                         /* Quoted quotes collapse. */
 567                         pairs++;
 568                         (*pos)++;
 569                 }
 570                 if (pairs)
 571                         buf[*pos - pairs] = '\0';
 572
 573                 if ('\0' == buf[*pos]) {
 574                         if (MDOC_PPHRASE & mdoc->flags)
 575                                 return(ARGS_QWORD);
 576                         mdoc_pmsg(mdoc, line, *pos, MANDOCERR_BADQUOTE);
 577                         return(ARGS_QWORD);
 578                 }
 579
 580                 mdoc->flags &= ~MDOC_PHRASELIT;
 581                 buf[(*pos)++] = '\0';
 582
 583                 if ('\0' == buf[*pos])
 584                         return(ARGS_QWORD);
 585
 586                 while (' ' == buf[*pos])
 587                         (*pos)++;
 588
 589                 if ('\0' == buf[*pos])
 590                         mdoc_pmsg(mdoc, line, *pos, MANDOCERR_EOLNSPACE);
 591
 592                 return(ARGS_QWORD);
 593         }
 594
 595         p = &buf[*pos];
 596         *v = mandoc_getarg(mdoc->parse, &p, line, pos);
 597
 598         return(ARGS_WORD);
 599 }
 600
 601 /*
 602  * Check if the string consists only of space-separated closing
 603  * delimiters.  This is a bit of a dance: the first must be a close
 604  * delimiter, but it may be followed by middle delimiters.  Arbitrary
 605  * whitespace may separate these tokens.
 606  */
 607 static int
 608 args_checkpunct(const char *buf, int i)
 609 {
 610         int              j;
 611         char             dbuf[DELIMSZ];
 612         enum mdelim      d;
 613
 614         /* First token must be a close-delimiter. */
 615
 616         for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
 617                 dbuf[j] = buf[i];
 618
 619         if (DELIMSZ == j)
 620                 return(0);
 621
 622         dbuf[j] = '\0';
 623         if (DELIM_CLOSE != mdoc_isdelim(dbuf))
 624                 return(0);
 625
 626         while (' ' == buf[i])
 627                 i++;
 628
 629         /* Remaining must NOT be open/none. */
 630
 631         while (buf[i]) {
 632                 j = 0;
 633                 while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
 634                         dbuf[j++] = buf[i++];
 635
 636                 if (DELIMSZ == j)
 637                         return(0);
 638
 639                 dbuf[j] = '\0';
 640                 d = mdoc_isdelim(dbuf);
 641                 if (DELIM_NONE == d || DELIM_OPEN == d)
 642                         return(0);
 643
 644                 while (' ' == buf[i])
 645                         i++;
 646         }
 647
 648         return('\0' == buf[i]);
 649 }
 650
 651 static int
 652 argv_multi(struct mdoc *mdoc, int line,
 653                 struct mdoc_argv *v, int *pos, char *buf)
 654 {
 655         enum margserr    ac;
 656         char            *p;
 657
 658         for (v->sz = 0; ; v->sz++) {
 659                 if ('-' == buf[*pos])
 660                         break;
 661                 ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
 662                 if (ARGS_ERROR == ac)
 663                         return(0);
 664                 else if (ARGS_EOLN == ac)
 665                         break;
 666
 667                 if (0 == v->sz % MULTI_STEP)
 668                         v->value = mandoc_realloc(v->value,
 669                                 (v->sz + MULTI_STEP) * sizeof(char *));
 670
 671                 v->value[(int)v->sz] = mandoc_strdup(p);
 672         }
 673
 674         return(1);
 675 }
 676
 677 static int
 678 argv_single(struct mdoc *mdoc, int line,
 679                 struct mdoc_argv *v, int *pos, char *buf)
 680 {
 681         enum margserr    ac;
 682         char            *p;
 683
 684         ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
 685         if (ARGS_ERROR == ac)
 686                 return(0);
 687         if (ARGS_EOLN == ac)
 688                 return(1);
 689
 690         v->sz = 1;
 691         v->value = mandoc_malloc(sizeof(char *));
 692         v->value[0] = mandoc_strdup(p);
 693
 694         return(1);
 695 }