mdoc_argv.c

   1 /*      $Id: mdoc_argv.c,v 1.80 2011/06/18 16:53:27 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
   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 above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <sys/types.h>
  22
  23 #include <assert.h>
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27
  28 #include "mdoc.h"
  29 #include "mandoc.h"
  30 #include "libmdoc.h"
  31 #include "libmandoc.h"
  32
  33 #define MULTI_STEP       5 /* pre-allocate argument values */
  34 #define DELIMSZ          6 /* max possible size of a delimiter */
  35
  36 enum    argsflag {
  37         ARGSFL_NONE = 0,
  38         ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
  39         ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
  40 };
  41
  42 enum    argvflag {
  43         ARGV_NONE, /* no args to flag (e.g., -split) */
  44         ARGV_SINGLE, /* one arg to flag (e.g., -file xxx)  */
  45         ARGV_MULTI, /* multiple args (e.g., -column xxx yyy) */
  46         ARGV_OPT_SINGLE /* optional arg (e.g., -offset [xxx]) */
  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_opt_single(struct mdoc *, int,
  61                                 struct mdoc_argv *, int *, char *);
  62 static  int              argv_single(struct mdoc *, int,
  63                                 struct mdoc_argv *, int *, char *);
  64
  65 static  const enum argvflag argvflags[MDOC_ARG_MAX] = {
  66         ARGV_NONE,      /* MDOC_Split */
  67         ARGV_NONE,      /* MDOC_Nosplit */
  68         ARGV_NONE,      /* MDOC_Ragged */
  69         ARGV_NONE,      /* MDOC_Unfilled */
  70         ARGV_NONE,      /* MDOC_Literal */
  71         ARGV_SINGLE,    /* MDOC_File */
  72         ARGV_OPT_SINGLE, /* MDOC_Offset */
  73         ARGV_NONE,      /* MDOC_Bullet */
  74         ARGV_NONE,      /* MDOC_Dash */
  75         ARGV_NONE,      /* MDOC_Hyphen */
  76         ARGV_NONE,      /* MDOC_Item */
  77         ARGV_NONE,      /* MDOC_Enum */
  78         ARGV_NONE,      /* MDOC_Tag */
  79         ARGV_NONE,      /* MDOC_Diag */
  80         ARGV_NONE,      /* MDOC_Hang */
  81         ARGV_NONE,      /* MDOC_Ohang */
  82         ARGV_NONE,      /* MDOC_Inset */
  83         ARGV_MULTI,     /* MDOC_Column */
  84         ARGV_SINGLE,    /* MDOC_Width */
  85         ARGV_NONE,      /* MDOC_Compact */
  86         ARGV_NONE,      /* MDOC_Std */
  87         ARGV_NONE,      /* MDOC_Filled */
  88         ARGV_NONE,      /* MDOC_Words */
  89         ARGV_NONE,      /* MDOC_Emphasis */
  90         ARGV_NONE,      /* MDOC_Symbolic */
  91         ARGV_NONE       /* MDOC_Symbolic */
  92 };
  93
  94 static  const enum mdocargt args_Ex[] = {
  95         MDOC_Std,
  96         MDOC_ARG_MAX
  97 };
  98
  99 static  const enum mdocargt args_An[] = {
 100         MDOC_Split,
 101         MDOC_Nosplit,
 102         MDOC_ARG_MAX
 103 };
 104
 105 static  const enum mdocargt args_Bd[] = {
 106         MDOC_Ragged,
 107         MDOC_Unfilled,
 108         MDOC_Filled,
 109         MDOC_Literal,
 110         MDOC_File,
 111         MDOC_Offset,
 112         MDOC_Compact,
 113         MDOC_Centred,
 114         MDOC_ARG_MAX
 115 };
 116
 117 static  const enum mdocargt args_Bf[] = {
 118         MDOC_Emphasis,
 119         MDOC_Literal,
 120         MDOC_Symbolic,
 121         MDOC_ARG_MAX
 122 };
 123
 124 static  const enum mdocargt args_Bk[] = {
 125         MDOC_Words,
 126         MDOC_ARG_MAX
 127 };
 128
 129 static  const enum mdocargt args_Bl[] = {
 130         MDOC_Bullet,
 131         MDOC_Dash,
 132         MDOC_Hyphen,
 133         MDOC_Item,
 134         MDOC_Enum,
 135         MDOC_Tag,
 136         MDOC_Diag,
 137         MDOC_Hang,
 138         MDOC_Ohang,
 139         MDOC_Inset,
 140         MDOC_Column,
 141         MDOC_Width,
 142         MDOC_Offset,
 143         MDOC_Compact,
 144         MDOC_Nested,
 145         MDOC_ARG_MAX
 146 };
 147
 148 static  const struct mdocarg mdocargs[MDOC_MAX] = {
 149         { ARGSFL_NONE, NULL }, /* Ap */
 150         { ARGSFL_NONE, NULL }, /* Dd */
 151         { ARGSFL_NONE, NULL }, /* Dt */
 152         { ARGSFL_NONE, NULL }, /* Os */
 153         { ARGSFL_NONE, NULL }, /* Sh */
 154         { ARGSFL_NONE, NULL }, /* Ss */
 155         { ARGSFL_NONE, NULL }, /* Pp */
 156         { ARGSFL_DELIM, NULL }, /* D1 */
 157         { ARGSFL_DELIM, NULL }, /* Dl */
 158         { ARGSFL_NONE, args_Bd }, /* Bd */
 159         { ARGSFL_NONE, NULL }, /* Ed */
 160         { ARGSFL_NONE, args_Bl }, /* Bl */
 161         { ARGSFL_NONE, NULL }, /* El */
 162         { ARGSFL_NONE, NULL }, /* It */
 163         { ARGSFL_DELIM, NULL }, /* Ad */
 164         { ARGSFL_DELIM, args_An }, /* An */
 165         { ARGSFL_DELIM, NULL }, /* Ar */
 166         { ARGSFL_NONE, NULL }, /* Cd */
 167         { ARGSFL_DELIM, NULL }, /* Cm */
 168         { ARGSFL_DELIM, NULL }, /* Dv */
 169         { ARGSFL_DELIM, NULL }, /* Er */
 170         { ARGSFL_DELIM, NULL }, /* Ev */
 171         { ARGSFL_NONE, args_Ex }, /* Ex */
 172         { ARGSFL_DELIM, NULL }, /* Fa */
 173         { ARGSFL_NONE, NULL }, /* Fd */
 174         { ARGSFL_DELIM, NULL }, /* Fl */
 175         { ARGSFL_DELIM, NULL }, /* Fn */
 176         { ARGSFL_DELIM, NULL }, /* Ft */
 177         { ARGSFL_DELIM, NULL }, /* Ic */
 178         { ARGSFL_NONE, NULL }, /* In */
 179         { ARGSFL_DELIM, NULL }, /* Li */
 180         { ARGSFL_NONE, NULL }, /* Nd */
 181         { ARGSFL_DELIM, NULL }, /* Nm */
 182         { ARGSFL_DELIM, NULL }, /* Op */
 183         { ARGSFL_NONE, NULL }, /* Ot */
 184         { ARGSFL_DELIM, NULL }, /* Pa */
 185         { ARGSFL_NONE, args_Ex }, /* Rv */
 186         { ARGSFL_DELIM, NULL }, /* St */
 187         { ARGSFL_DELIM, NULL }, /* Va */
 188         { ARGSFL_DELIM, NULL }, /* Vt */
 189         { ARGSFL_DELIM, NULL }, /* Xr */
 190         { ARGSFL_NONE, NULL }, /* %A */
 191         { ARGSFL_NONE, NULL }, /* %B */
 192         { ARGSFL_NONE, NULL }, /* %D */
 193         { ARGSFL_NONE, NULL }, /* %I */
 194         { ARGSFL_NONE, NULL }, /* %J */
 195         { ARGSFL_NONE, NULL }, /* %N */
 196         { ARGSFL_NONE, NULL }, /* %O */
 197         { ARGSFL_NONE, NULL }, /* %P */
 198         { ARGSFL_NONE, NULL }, /* %R */
 199         { ARGSFL_NONE, NULL }, /* %T */
 200         { ARGSFL_NONE, NULL }, /* %V */
 201         { ARGSFL_DELIM, NULL }, /* Ac */
 202         { ARGSFL_NONE, NULL }, /* Ao */
 203         { ARGSFL_DELIM, NULL }, /* Aq */
 204         { ARGSFL_DELIM, NULL }, /* At */
 205         { ARGSFL_DELIM, NULL }, /* Bc */
 206         { ARGSFL_NONE, args_Bf }, /* Bf */
 207         { ARGSFL_NONE, NULL }, /* Bo */
 208         { ARGSFL_DELIM, NULL }, /* Bq */
 209         { ARGSFL_DELIM, NULL }, /* Bsx */
 210         { ARGSFL_DELIM, NULL }, /* Bx */
 211         { ARGSFL_NONE, NULL }, /* Db */
 212         { ARGSFL_DELIM, NULL }, /* Dc */
 213         { ARGSFL_NONE, NULL }, /* Do */
 214         { ARGSFL_DELIM, NULL }, /* Dq */
 215         { ARGSFL_DELIM, NULL }, /* Ec */
 216         { ARGSFL_NONE, NULL }, /* Ef */
 217         { ARGSFL_DELIM, NULL }, /* Em */
 218         { ARGSFL_NONE, NULL }, /* Eo */
 219         { ARGSFL_DELIM, NULL }, /* Fx */
 220         { ARGSFL_DELIM, NULL }, /* Ms */
 221         { ARGSFL_DELIM, NULL }, /* No */
 222         { ARGSFL_DELIM, NULL }, /* Ns */
 223         { ARGSFL_DELIM, NULL }, /* Nx */
 224         { ARGSFL_DELIM, NULL }, /* Ox */
 225         { ARGSFL_DELIM, NULL }, /* Pc */
 226         { ARGSFL_DELIM, NULL }, /* Pf */
 227         { ARGSFL_NONE, NULL }, /* Po */
 228         { ARGSFL_DELIM, NULL }, /* Pq */
 229         { ARGSFL_DELIM, NULL }, /* Qc */
 230         { ARGSFL_DELIM, NULL }, /* Ql */
 231         { ARGSFL_NONE, NULL }, /* Qo */
 232         { ARGSFL_DELIM, NULL }, /* Qq */
 233         { ARGSFL_NONE, NULL }, /* Re */
 234         { ARGSFL_NONE, NULL }, /* Rs */
 235         { ARGSFL_DELIM, NULL }, /* Sc */
 236         { ARGSFL_NONE, NULL }, /* So */
 237         { ARGSFL_DELIM, NULL }, /* Sq */
 238         { ARGSFL_NONE, NULL }, /* Sm */
 239         { ARGSFL_DELIM, NULL }, /* Sx */
 240         { ARGSFL_DELIM, NULL }, /* Sy */
 241         { ARGSFL_DELIM, NULL }, /* Tn */
 242         { ARGSFL_DELIM, NULL }, /* Ux */
 243         { ARGSFL_DELIM, NULL }, /* Xc */
 244         { ARGSFL_NONE, NULL }, /* Xo */
 245         { ARGSFL_NONE, NULL }, /* Fo */
 246         { ARGSFL_NONE, NULL }, /* Fc */
 247         { ARGSFL_NONE, NULL }, /* Oo */
 248         { ARGSFL_DELIM, NULL }, /* Oc */
 249         { ARGSFL_NONE, args_Bk }, /* Bk */
 250         { ARGSFL_NONE, NULL }, /* Ek */
 251         { ARGSFL_NONE, NULL }, /* Bt */
 252         { ARGSFL_NONE, NULL }, /* Hf */
 253         { ARGSFL_NONE, NULL }, /* Fr */
 254         { ARGSFL_NONE, NULL }, /* Ud */
 255         { ARGSFL_NONE, NULL }, /* Lb */
 256         { ARGSFL_NONE, NULL }, /* Lp */
 257         { ARGSFL_DELIM, NULL }, /* Lk */
 258         { ARGSFL_DELIM, NULL }, /* Mt */
 259         { ARGSFL_DELIM, NULL }, /* Brq */
 260         { ARGSFL_NONE, NULL }, /* Bro */
 261         { ARGSFL_DELIM, NULL }, /* Brc */
 262         { ARGSFL_NONE, NULL }, /* %C */
 263         { ARGSFL_NONE, NULL }, /* Es */
 264         { ARGSFL_NONE, NULL }, /* En */
 265         { ARGSFL_NONE, NULL }, /* Dx */
 266         { ARGSFL_NONE, NULL }, /* %Q */
 267         { ARGSFL_NONE, NULL }, /* br */
 268         { ARGSFL_NONE, NULL }, /* sp */
 269         { ARGSFL_NONE, NULL }, /* %U */
 270         { ARGSFL_NONE, NULL }, /* Ta */
 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 *m, 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(m, line, &tmp, pos, buf))
 348                         return(ARGV_ERROR);
 349                 break;
 350         case (ARGV_MULTI):
 351                 if ( ! argv_multi(m, line, &tmp, pos, buf))
 352                         return(ARGV_ERROR);
 353                 break;
 354         case (ARGV_OPT_SINGLE):
 355                 if ( ! argv_opt_single(m, line, &tmp, pos, buf))
 356                         return(ARGV_ERROR);
 357                 break;
 358         case (ARGV_NONE):
 359                 break;
 360         }
 361
 362         if (NULL == (arg = *v))
 363                 arg = *v = mandoc_calloc(1, sizeof(struct mdoc_arg));
 364
 365         arg->argc++;
 366         arg->argv = mandoc_realloc
 367                 (arg->argv, arg->argc * sizeof(struct mdoc_argv));
 368
 369         memcpy(&arg->argv[(int)arg->argc - 1],
 370                         &tmp, sizeof(struct mdoc_argv));
 371
 372         return(ARGV_ARG);
 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_zargs(struct mdoc *m, int line, int *pos, char *buf, char **v)
 417 {
 418
 419         return(args(m, line, pos, buf, ARGSFL_NONE, v));
 420 }
 421
 422 enum margserr
 423 mdoc_args(struct mdoc *m, int line, int *pos,
 424                 char *buf, enum mdoct tok, char **v)
 425 {
 426         enum argsflag     fl;
 427         struct mdoc_node *n;
 428
 429         fl = mdocargs[tok].flags;
 430
 431         if (MDOC_It != tok)
 432                 return(args(m, line, pos, buf, fl, v));
 433
 434         /*
 435          * We know that we're in an `It', so it's reasonable to expect
 436          * us to be sitting in a `Bl'.  Someday this may not be the case
 437          * (if we allow random `It's sitting out there), so provide a
 438          * safe fall-back into the default behaviour.
 439          */
 440
 441         for (n = m->last; n; n = n->parent)
 442                 if (MDOC_Bl == n->tok)
 443                         if (LIST_column == n->norm->Bl.type) {
 444                                 fl = ARGSFL_TABSEP;
 445                                 break;
 446                         }
 447
 448         return(args(m, line, pos, buf, fl, v));
 449 }
 450
 451 static enum margserr
 452 args(struct mdoc *m, int line, int *pos,
 453                 char *buf, enum argsflag fl, char **v)
 454 {
 455         char            *p, *pp;
 456         enum margserr    rc;
 457
 458         if ('\0' == buf[*pos]) {
 459                 if (MDOC_PPHRASE & m->flags)
 460                         return(ARGS_EOLN);
 461                 /*
 462                  * If we're not in a partial phrase and the flag for
 463                  * being a phrase literal is still set, the punctuation
 464                  * is unterminated.
 465                  */
 466                 if (MDOC_PHRASELIT & m->flags)
 467                         mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);
 468
 469                 m->flags &= ~MDOC_PHRASELIT;
 470                 return(ARGS_EOLN);
 471         }
 472
 473         *v = &buf[*pos];
 474
 475         if (ARGSFL_DELIM == fl)
 476                 if (args_checkpunct(buf, *pos))
 477                         return(ARGS_PUNCT);
 478
 479         /*
 480          * First handle TABSEP items, restricted to `Bl -column'.  This
 481          * ignores conventional token parsing and instead uses tabs or
 482          * `Ta' macros to separate phrases.  Phrases are parsed again
 483          * for arguments at a later phase.
 484          */
 485
 486         if (ARGSFL_TABSEP == fl) {
 487                 /* Scan ahead to tab (can't be escaped). */
 488                 p = strchr(*v, '\t');
 489                 pp = NULL;
 490
 491                 /* Scan ahead to unescaped `Ta'. */
 492                 if ( ! (MDOC_PHRASELIT & m->flags))
 493                         for (pp = *v; ; pp++) {
 494                                 if (NULL == (pp = strstr(pp, "Ta")))
 495                                         break;
 496                                 if (pp > *v && ' ' != *(pp - 1))
 497                                         continue;
 498                                 if (' ' == *(pp + 2) || '\0' == *(pp + 2))
 499                                         break;
 500                         }
 501
 502                 /* By default, assume a phrase. */
 503                 rc = ARGS_PHRASE;
 504
 505                 /*
 506                  * Adjust new-buffer position to be beyond delimiter
 507                  * mark (e.g., Ta -> end + 2).
 508                  */
 509                 if (p && pp) {
 510                         *pos += pp < p ? 2 : 1;
 511                         rc = pp < p ? ARGS_PHRASE : ARGS_PPHRASE;
 512                         p = pp < p ? pp : p;
 513                 } else if (p && ! pp) {
 514                         rc = ARGS_PPHRASE;
 515                         *pos += 1;
 516                 } else if (pp && ! p) {
 517                         p = pp;
 518                         *pos += 2;
 519                 } else {
 520                         rc = ARGS_PEND;
 521                         p = strchr(*v, 0);
 522                 }
 523
 524                 /* Whitespace check for eoln case... */
 525                 if ('\0' == *p && ' ' == *(p - 1))
 526                         mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);
 527
 528                 *pos += (int)(p - *v);
 529
 530                 /* Strip delimiter's preceding whitespace. */
 531                 pp = p - 1;
 532                 while (pp > *v && ' ' == *pp) {
 533                         if (pp > *v && '\\' == *(pp - 1))
 534                                 break;
 535                         pp--;
 536                 }
 537                 *(pp + 1) = 0;
 538
 539                 /* Strip delimiter's proceeding whitespace. */
 540                 for (pp = &buf[*pos]; ' ' == *pp; pp++, (*pos)++)
 541                         /* Skip ahead. */ ;
 542
 543                 return(rc);
 544         }
 545
 546         /*
 547          * Process a quoted literal.  A quote begins with a double-quote
 548          * and ends with a double-quote NOT preceded by a double-quote.
 549          * Whitespace is NOT involved in literal termination.
 550          */
 551
 552         if (MDOC_PHRASELIT & m->flags || '\"' == buf[*pos]) {
 553                 if ( ! (MDOC_PHRASELIT & m->flags))
 554                         *v = &buf[++(*pos)];
 555
 556                 if (MDOC_PPHRASE & m->flags)
 557                         m->flags |= MDOC_PHRASELIT;
 558
 559                 for ( ; buf[*pos]; (*pos)++) {
 560                         if ('\"' != buf[*pos])
 561                                 continue;
 562                         if ('\"' != buf[*pos + 1])
 563                                 break;
 564                         (*pos)++;
 565                 }
 566
 567                 if ('\0' == buf[*pos]) {
 568                         if (MDOC_PPHRASE & m->flags)
 569                                 return(ARGS_QWORD);
 570                         mdoc_pmsg(m, line, *pos, MANDOCERR_BADQUOTE);
 571                         return(ARGS_QWORD);
 572                 }
 573
 574                 m->flags &= ~MDOC_PHRASELIT;
 575                 buf[(*pos)++] = '\0';
 576
 577                 if ('\0' == buf[*pos])
 578                         return(ARGS_QWORD);
 579
 580                 while (' ' == buf[*pos])
 581                         (*pos)++;
 582
 583                 if ('\0' == buf[*pos])
 584                         mdoc_pmsg(m, line, *pos, MANDOCERR_EOLNSPACE);
 585
 586                 return(ARGS_QWORD);
 587         }
 588
 589         p = &buf[*pos];
 590         *v = mandoc_getarg(m->parse, &p, line, pos);
 591
 592         return(ARGS_WORD);
 593 }
 594
 595 /*
 596  * Check if the string consists only of space-separated closing
 597  * delimiters.  This is a bit of a dance: the first must be a close
 598  * delimiter, but it may be followed by middle delimiters.  Arbitrary
 599  * whitespace may separate these tokens.
 600  */
 601 static int
 602 args_checkpunct(const char *buf, int i)
 603 {
 604         int              j;
 605         char             dbuf[DELIMSZ];
 606         enum mdelim      d;
 607
 608         /* First token must be a close-delimiter. */
 609
 610         for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
 611                 dbuf[j] = buf[i];
 612
 613         if (DELIMSZ == j)
 614                 return(0);
 615
 616         dbuf[j] = '\0';
 617         if (DELIM_CLOSE != mdoc_isdelim(dbuf))
 618                 return(0);
 619
 620         while (' ' == buf[i])
 621                 i++;
 622
 623         /* Remaining must NOT be open/none. */
 624
 625         while (buf[i]) {
 626                 j = 0;
 627                 while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
 628                         dbuf[j++] = buf[i++];
 629
 630                 if (DELIMSZ == j)
 631                         return(0);
 632
 633                 dbuf[j] = '\0';
 634                 d = mdoc_isdelim(dbuf);
 635                 if (DELIM_NONE == d || DELIM_OPEN == d)
 636                         return(0);
 637
 638                 while (' ' == buf[i])
 639                         i++;
 640         }
 641
 642         return('\0' == buf[i]);
 643 }
 644
 645 static int
 646 argv_multi(struct mdoc *m, int line,
 647                 struct mdoc_argv *v, int *pos, char *buf)
 648 {
 649         enum margserr    ac;
 650         char            *p;
 651
 652         for (v->sz = 0; ; v->sz++) {
 653                 if ('-' == buf[*pos])
 654                         break;
 655                 ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
 656                 if (ARGS_ERROR == ac)
 657                         return(0);
 658                 else if (ARGS_EOLN == ac)
 659                         break;
 660
 661                 if (0 == v->sz % MULTI_STEP)
 662                         v->value = mandoc_realloc(v->value,
 663                                 (v->sz + MULTI_STEP) * sizeof(char *));
 664
 665                 v->value[(int)v->sz] = mandoc_strdup(p);
 666         }
 667
 668         return(1);
 669 }
 670
 671 static int
 672 argv_opt_single(struct mdoc *m, int line,
 673                 struct mdoc_argv *v, int *pos, char *buf)
 674 {
 675         enum margserr    ac;
 676         char            *p;
 677
 678         if ('-' == buf[*pos])
 679                 return(1);
 680
 681         ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
 682         if (ARGS_ERROR == ac)
 683                 return(0);
 684         if (ARGS_EOLN == ac)
 685                 return(1);
 686
 687         v->sz = 1;
 688         v->value = mandoc_malloc(sizeof(char *));
 689         v->value[0] = mandoc_strdup(p);
 690
 691         return(1);
 692 }
 693
 694 static int
 695 argv_single(struct mdoc *m, int line,
 696                 struct mdoc_argv *v, int *pos, char *buf)
 697 {
 698         int              ppos;
 699         enum margserr    ac;
 700         char            *p;
 701
 702         ppos = *pos;
 703
 704         ac = args(m, line, pos, buf, ARGSFL_NONE, &p);
 705         if (ARGS_EOLN == ac) {
 706                 mdoc_pmsg(m, line, ppos, MANDOCERR_SYNTARGVCOUNT);
 707                 return(0);
 708         } else if (ARGS_ERROR == ac)
 709                 return(0);
 710
 711         v->sz = 1;
 712         v->value = mandoc_malloc(sizeof(char *));
 713         v->value[0] = mandoc_strdup(p);
 714
 715         return(1);
 716 }