bin/mandoc/mdoc_argv.c

   1 /*      $Id: mdoc_argv.c,v 1.119 2018/12/21 17:15:19 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2012, 2014-2018 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 "roff_int.h"
  33 #include "libmdoc.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 roff_man *, int, int *,
  57                                 char *, enum argsflag, char **);
  58 static  int              args_checkpunct(const char *, int);
  59 static  void             argv_multi(struct roff_man *, int,
  60                                 struct mdoc_argv *, int *, char *);
  61 static  void             argv_single(struct roff_man *, 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 - MDOC_Dd] = {
 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 }, /* Ap */
 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_DELIM, 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_DELIM, 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_DELIM, NULL }, /* En */
 264         { ARGSFL_DELIM, NULL }, /* Dx */
 265         { ARGSFL_NONE, NULL }, /* %Q */
 266         { ARGSFL_NONE, NULL }, /* %U */
 267         { ARGSFL_NONE, NULL }, /* Ta */
 268 };
 269
 270
 271 /*
 272  * Parse flags and their arguments from the input line.
 273  * These come in the form -flag [argument ...].
 274  * Some flags take no argument, some one, some multiple.
 275  */
 276 void
 277 mdoc_argv(struct roff_man *mdoc, int line, enum roff_tok tok,
 278         struct mdoc_arg **reta, int *pos, char *buf)
 279 {
 280         struct mdoc_argv          tmpv;
 281         struct mdoc_argv        **retv;
 282         const enum mdocargt      *argtable;
 283         char                     *argname;
 284         int                       ipos, retc;
 285         char                      savechar;
 286
 287         *reta = NULL;
 288
 289         /* Which flags does this macro support? */
 290
 291         assert(tok >= MDOC_Dd && tok < MDOC_MAX);
 292         argtable = mdocargs[tok - MDOC_Dd].argvs;
 293         if (argtable == NULL)
 294                 return;
 295
 296         /* Loop over the flags on the input line. */
 297
 298         ipos = *pos;
 299         while (buf[ipos] == '-') {
 300
 301                 /* Seek to the first unescaped space. */
 302
 303                 for (argname = buf + ++ipos; buf[ipos] != '\0'; ipos++)
 304                         if (buf[ipos] == ' ' && buf[ipos - 1] != '\\')
 305                                 break;
 306
 307                 /*
 308                  * We want to nil-terminate the word to look it up.
 309                  * But we may not have a flag, in which case we need
 310                  * to restore the line as-is.  So keep around the
 311                  * stray byte, which we'll reset upon exiting.
 312                  */
 313
 314                 if ((savechar = buf[ipos]) != '\0')
 315                         buf[ipos++] = '\0';
 316
 317                 /*
 318                  * Now look up the word as a flag.  Use temporary
 319                  * storage that we'll copy into the node's flags.
 320                  */
 321
 322                 while ((tmpv.arg = *argtable++) != MDOC_ARG_MAX)
 323                         if ( ! strcmp(argname, mdoc_argnames[tmpv.arg]))
 324                                 break;
 325
 326                 /* If it isn't a flag, restore the saved byte. */
 327
 328                 if (tmpv.arg == MDOC_ARG_MAX) {
 329                         if (savechar != '\0')
 330                                 buf[ipos - 1] = savechar;
 331                         break;
 332                 }
 333
 334                 /* Read to the next word (the first argument). */
 335
 336                 while (buf[ipos] == ' ')
 337                         ipos++;
 338
 339                 /* Parse the arguments of the flag. */
 340
 341                 tmpv.line  = line;
 342                 tmpv.pos   = *pos;
 343                 tmpv.sz    = 0;
 344                 tmpv.value = NULL;
 345
 346                 switch (argvflags[tmpv.arg]) {
 347                 case ARGV_SINGLE:
 348                         argv_single(mdoc, line, &tmpv, &ipos, buf);
 349                         break;
 350                 case ARGV_MULTI:
 351                         argv_multi(mdoc, line, &tmpv, &ipos, buf);
 352                         break;
 353                 case ARGV_NONE:
 354                         break;
 355                 }
 356
 357                 /* Append to the return values. */
 358
 359                 if (*reta == NULL)
 360                         *reta = mandoc_calloc(1, sizeof(**reta));
 361
 362                 retc = ++(*reta)->argc;
 363                 retv = &(*reta)->argv;
 364                 *retv = mandoc_reallocarray(*retv, retc, sizeof(**retv));
 365                 memcpy(*retv + retc - 1, &tmpv, sizeof(**retv));
 366
 367                 /* Prepare for parsing the next flag. */
 368
 369                 *pos = ipos;
 370                 argtable = mdocargs[tok - MDOC_Dd].argvs;
 371         }
 372 }
 373
 374 void
 375 mdoc_argv_free(struct mdoc_arg *p)
 376 {
 377         int              i;
 378
 379         if (NULL == p)
 380                 return;
 381
 382         if (p->refcnt) {
 383                 --(p->refcnt);
 384                 if (p->refcnt)
 385                         return;
 386         }
 387         assert(p->argc);
 388
 389         for (i = (int)p->argc - 1; i >= 0; i--)
 390                 argn_free(p, i);
 391
 392         free(p->argv);
 393         free(p);
 394 }
 395
 396 static void
 397 argn_free(struct mdoc_arg *p, int iarg)
 398 {
 399         struct mdoc_argv *arg;
 400         int               j;
 401
 402         arg = &p->argv[iarg];
 403
 404         if (arg->sz && arg->value) {
 405                 for (j = (int)arg->sz - 1; j >= 0; j--)
 406                         free(arg->value[j]);
 407                 free(arg->value);
 408         }
 409
 410         for (--p->argc; iarg < (int)p->argc; iarg++)
 411                 p->argv[iarg] = p->argv[iarg+1];
 412 }
 413
 414 enum margserr
 415 mdoc_args(struct roff_man *mdoc, int line, int *pos,
 416         char *buf, enum roff_tok tok, char **v)
 417 {
 418         struct roff_node *n;
 419         enum argsflag     fl;
 420
 421         fl = tok == TOKEN_NONE ? ARGSFL_NONE : mdocargs[tok - MDOC_Dd].flags;
 422
 423         /*
 424          * We know that we're in an `It', so it's reasonable to expect
 425          * us to be sitting in a `Bl'.  Someday this may not be the case
 426          * (if we allow random `It's sitting out there), so provide a
 427          * safe fall-back into the default behaviour.
 428          */
 429
 430         if (tok == MDOC_It) {
 431                 for (n = mdoc->last; n != NULL; n = n->parent) {
 432                         if (n->tok != MDOC_Bl)
 433                                 continue;
 434                         if (n->norm->Bl.type == LIST_column)
 435                                 fl = ARGSFL_TABSEP;
 436                         break;
 437                 }
 438         }
 439
 440         return args(mdoc, line, pos, buf, fl, v);
 441 }
 442
 443 static enum margserr
 444 args(struct roff_man *mdoc, int line, int *pos,
 445                 char *buf, enum argsflag fl, char **v)
 446 {
 447         char            *p;
 448         char            *v_local;
 449         int              pairs;
 450
 451         if (buf[*pos] == '\0') {
 452                 if (mdoc->flags & MDOC_PHRASELIT &&
 453                     ! (mdoc->flags & MDOC_PHRASE)) {
 454                         mandoc_msg(MANDOCERR_ARG_QUOTE, line, *pos, NULL);
 455                         mdoc->flags &= ~MDOC_PHRASELIT;
 456                 }
 457                 return ARGS_EOLN;
 458         }
 459
 460         if (v == NULL)
 461                 v = &v_local;
 462         *v = buf + *pos;
 463
 464         if (fl == ARGSFL_DELIM && args_checkpunct(buf, *pos))
 465                 return ARGS_PUNCT;
 466
 467         /*
 468          * Tabs in `It' lines in `Bl -column' can't be escaped.
 469          * Phrases are reparsed for `Ta' and other macros later.
 470          */
 471
 472         if (fl == ARGSFL_TABSEP) {
 473                 if ((p = strchr(*v, '\t')) != NULL) {
 474
 475                         /*
 476                          * Words right before and right after
 477                          * tab characters are not parsed,
 478                          * unless there is a blank in between.
 479                          */
 480
 481                         if (p > buf && p[-1] != ' ')
 482                                 mdoc->flags |= MDOC_PHRASEQL;
 483                         if (p[1] != ' ')
 484                                 mdoc->flags |= MDOC_PHRASEQN;
 485
 486                         /*
 487                          * One or more blanks after a tab cause
 488                          * one leading blank in the next column.
 489                          * So skip all but one of them.
 490                          */
 491
 492                         *pos += (int)(p - *v) + 1;
 493                         while (buf[*pos] == ' ' && buf[*pos + 1] == ' ')
 494                                 (*pos)++;
 495
 496                         /*
 497                          * A tab at the end of an input line
 498                          * switches to the next column.
 499                          */
 500
 501                         if (buf[*pos] == '\0' || buf[*pos + 1] == '\0')
 502                                 mdoc->flags |= MDOC_PHRASEQN;
 503                 } else {
 504                         p = strchr(*v, '\0');
 505                         if (p[-1] == ' ')
 506                                 mandoc_msg(MANDOCERR_SPACE_EOL,
 507                                     line, *pos, NULL);
 508                         *pos += (int)(p - *v);
 509                 }
 510
 511                 /* Skip any trailing blank characters. */
 512                 while (p > *v && p[-1] == ' ' &&
 513                     (p - 1 == *v || p[-2] != '\\'))
 514                         p--;
 515                 *p = '\0';
 516
 517                 return ARGS_PHRASE;
 518         }
 519
 520         /*
 521          * Process a quoted literal.  A quote begins with a double-quote
 522          * and ends with a double-quote NOT preceded by a double-quote.
 523          * NUL-terminate the literal in place.
 524          * Collapse pairs of quotes inside quoted literals.
 525          * Whitespace is NOT involved in literal termination.
 526          */
 527
 528         if (mdoc->flags & MDOC_PHRASELIT ||
 529             (mdoc->flags & MDOC_PHRASE && buf[*pos] == '\"')) {
 530                 if ((mdoc->flags & MDOC_PHRASELIT) == 0) {
 531                         *v = &buf[++(*pos)];
 532                         mdoc->flags |= MDOC_PHRASELIT;
 533                 }
 534                 pairs = 0;
 535                 for ( ; buf[*pos]; (*pos)++) {
 536                         /* Move following text left after quoted quotes. */
 537                         if (pairs)
 538                                 buf[*pos - pairs] = buf[*pos];
 539                         if ('\"' != buf[*pos])
 540                                 continue;
 541                         /* Unquoted quotes end quoted args. */
 542                         if ('\"' != buf[*pos + 1])
 543                                 break;
 544                         /* Quoted quotes collapse. */
 545                         pairs++;
 546                         (*pos)++;
 547                 }
 548                 if (pairs)
 549                         buf[*pos - pairs] = '\0';
 550
 551                 if (buf[*pos] == '\0') {
 552                         if ( ! (mdoc->flags & MDOC_PHRASE))
 553                                 mandoc_msg(MANDOCERR_ARG_QUOTE,
 554                                     line, *pos, NULL);
 555                         return ARGS_WORD;
 556                 }
 557
 558                 mdoc->flags &= ~MDOC_PHRASELIT;
 559                 buf[(*pos)++] = '\0';
 560
 561                 if ('\0' == buf[*pos])
 562                         return ARGS_WORD;
 563
 564                 while (' ' == buf[*pos])
 565                         (*pos)++;
 566
 567                 if ('\0' == buf[*pos])
 568                         mandoc_msg(MANDOCERR_SPACE_EOL, line, *pos, NULL);
 569
 570                 return ARGS_WORD;
 571         }
 572
 573         p = &buf[*pos];
 574         *v = roff_getarg(mdoc->roff, &p, line, pos);
 575         if (v == &v_local)
 576                 free(*v);
 577
 578         /*
 579          * After parsing the last word in this phrase,
 580          * tell lookup() whether or not to interpret it.
 581          */
 582
 583         if (*p == '\0' && mdoc->flags & MDOC_PHRASEQL) {
 584                 mdoc->flags &= ~MDOC_PHRASEQL;
 585                 mdoc->flags |= MDOC_PHRASEQF;
 586         }
 587         return ARGS_ALLOC;
 588 }
 589
 590 /*
 591  * Check if the string consists only of space-separated closing
 592  * delimiters.  This is a bit of a dance: the first must be a close
 593  * delimiter, but it may be followed by middle delimiters.  Arbitrary
 594  * whitespace may separate these tokens.
 595  */
 596 static int
 597 args_checkpunct(const char *buf, int i)
 598 {
 599         int              j;
 600         char             dbuf[DELIMSZ];
 601         enum mdelim      d;
 602
 603         /* First token must be a close-delimiter. */
 604
 605         for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
 606                 dbuf[j] = buf[i];
 607
 608         if (DELIMSZ == j)
 609                 return 0;
 610
 611         dbuf[j] = '\0';
 612         if (DELIM_CLOSE != mdoc_isdelim(dbuf))
 613                 return 0;
 614
 615         while (' ' == buf[i])
 616                 i++;
 617
 618         /* Remaining must NOT be open/none. */
 619
 620         while (buf[i]) {
 621                 j = 0;
 622                 while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
 623                         dbuf[j++] = buf[i++];
 624
 625                 if (DELIMSZ == j)
 626                         return 0;
 627
 628                 dbuf[j] = '\0';
 629                 d = mdoc_isdelim(dbuf);
 630                 if (DELIM_NONE == d || DELIM_OPEN == d)
 631                         return 0;
 632
 633                 while (' ' == buf[i])
 634                         i++;
 635         }
 636
 637         return '\0' == buf[i];
 638 }
 639
 640 static void
 641 argv_multi(struct roff_man *mdoc, int line,
 642                 struct mdoc_argv *v, int *pos, char *buf)
 643 {
 644         enum margserr    ac;
 645         char            *p;
 646
 647         for (v->sz = 0; ; v->sz++) {
 648                 if (buf[*pos] == '-')
 649                         break;
 650                 ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
 651                 if (ac == ARGS_EOLN)
 652                         break;
 653
 654                 if (v->sz % MULTI_STEP == 0)
 655                         v->value = mandoc_reallocarray(v->value,
 656                             v->sz + MULTI_STEP, sizeof(char *));
 657
 658                 if (ac != ARGS_ALLOC)
 659                         p = mandoc_strdup(p);
 660                 v->value[(int)v->sz] = p;
 661         }
 662 }
 663
 664 static void
 665 argv_single(struct roff_man *mdoc, int line,
 666                 struct mdoc_argv *v, int *pos, char *buf)
 667 {
 668         enum margserr    ac;
 669         char            *p;
 670
 671         ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
 672         if (ac == ARGS_EOLN)
 673                 return;
 674
 675         if (ac != ARGS_ALLOC)
 676                 p = mandoc_strdup(p);
 677
 678         v->sz = 1;
 679         v->value = mandoc_malloc(sizeof(char *));
 680         v->value[0] = p;
 681 }