argv.c

   1 /* $Id: argv.c,v 1.28 2009/02/23 15:19:47 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
   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
   7  * above copyright notice and this permission notice appear in all
   8  * copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
  11  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
  12  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
  13  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  14  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  15  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  16  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19 #include <assert.h>
  20 #include <ctype.h>
  21 #include <err.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25
  26 #include "private.h"
  27
  28 /*
  29  * Routines to parse arguments of macros.  Arguments follow the syntax
  30  * of `-arg [val [valN...]]'.  Arguments come in all types:  quoted
  31  * arguments, multiple arguments per value, no-value arguments, etc.
  32  */
  33
  34 #define ARGS_QUOTED     (1 << 0)
  35 #define ARGS_DELIM      (1 << 1)
  36 #define ARGS_TABSEP     (1 << 2)
  37
  38 static  int              lookup(int, const char *);
  39 static  int              args(struct mdoc *, int, int *,
  40                                 char *, int, char **);
  41 static  int              argv(struct mdoc *, int,
  42                                 struct mdoc_arg *, int *, char *);
  43 static  int              argv_single(struct mdoc *, int,
  44                                 struct mdoc_arg *, int *, char *);
  45 static  int              argv_multi(struct mdoc *, int,
  46                                 struct mdoc_arg *, int *, char *);
  47 static  int              pwarn(struct mdoc *, int, int, int);
  48 static  int              perr(struct mdoc *, int, int, int);
  49
  50 /* Warning messages. */
  51
  52 #define WQUOTPARM       (0)
  53 #define WARGVPARM       (1)
  54 #define WCOLEMPTY       (2)
  55 #define WTAILWS         (3)
  56
  57 /* Error messages. */
  58
  59 #define EQUOTTERM       (0)
  60 #define EARGVAL         (1)
  61 #define EARGMANY        (2)
  62
  63 static  int mdoc_argflags[MDOC_MAX] = {
  64         0, /* \" */
  65         0, /* Dd */
  66         0, /* Dt */
  67         0, /* Os */
  68         0, /* Sh */
  69         0, /* Ss */
  70         ARGS_DELIM, /* Pp */
  71         ARGS_DELIM, /* D1 */
  72         ARGS_DELIM, /* Dl */
  73         0, /* Bd */
  74         0, /* Ed */
  75         0, /* Bl */
  76         0, /* El */
  77         ARGS_DELIM, /* It */
  78         ARGS_DELIM, /* Ad */
  79         ARGS_DELIM, /* An */
  80         ARGS_DELIM, /* Ar */
  81         ARGS_QUOTED, /* Cd */
  82         ARGS_DELIM, /* Cm */
  83         ARGS_DELIM, /* Dv */
  84         ARGS_DELIM, /* Er */
  85         ARGS_DELIM, /* Ev */
  86         0, /* Ex */
  87         ARGS_DELIM | ARGS_QUOTED, /* Fa */
  88         0, /* Fd */
  89         ARGS_DELIM, /* Fl */
  90         ARGS_DELIM | ARGS_QUOTED, /* Fn */
  91         ARGS_DELIM | ARGS_QUOTED, /* Ft */
  92         ARGS_DELIM, /* Ic */
  93         0, /* In */
  94         ARGS_DELIM, /* Li */
  95         0, /* Nd */
  96         ARGS_DELIM, /* Nm */
  97         ARGS_DELIM, /* Op */
  98         0, /* Ot */
  99         ARGS_DELIM, /* Pa */
 100         0, /* Rv */
 101         ARGS_DELIM, /* St */
 102         ARGS_DELIM, /* Va */
 103         ARGS_DELIM, /* Vt */
 104         ARGS_DELIM, /* Xr */
 105         ARGS_QUOTED, /* %A */
 106         ARGS_QUOTED, /* %B */
 107         ARGS_QUOTED, /* %D */
 108         ARGS_QUOTED, /* %I */
 109         ARGS_QUOTED, /* %J */
 110         ARGS_QUOTED, /* %N */
 111         ARGS_QUOTED, /* %O */
 112         ARGS_QUOTED, /* %P */
 113         ARGS_QUOTED, /* %R */
 114         ARGS_QUOTED, /* %T */
 115         ARGS_QUOTED, /* %V */
 116         ARGS_DELIM, /* Ac */
 117         0, /* Ao */
 118         ARGS_DELIM, /* Aq */
 119         ARGS_DELIM, /* At */
 120         ARGS_DELIM, /* Bc */
 121         0, /* Bf */
 122         0, /* Bo */
 123         ARGS_DELIM, /* Bq */
 124         ARGS_DELIM, /* Bsx */
 125         ARGS_DELIM, /* Bx */
 126         0, /* Db */
 127         ARGS_DELIM, /* Dc */
 128         0, /* Do */
 129         ARGS_DELIM, /* Dq */
 130         ARGS_DELIM, /* Ec */
 131         0, /* Ef */
 132         ARGS_DELIM, /* Em */
 133         0, /* Eo */
 134         ARGS_DELIM, /* Fx */
 135         ARGS_DELIM, /* Ms */
 136         ARGS_DELIM, /* No */
 137         ARGS_DELIM, /* Ns */
 138         ARGS_DELIM, /* Nx */
 139         ARGS_DELIM, /* Ox */
 140         ARGS_DELIM, /* Pc */
 141         ARGS_DELIM, /* Pf */
 142         0, /* Po */
 143         ARGS_DELIM, /* Pq */
 144         ARGS_DELIM, /* Qc */
 145         ARGS_DELIM, /* Ql */
 146         0, /* Qo */
 147         ARGS_DELIM, /* Qq */
 148         0, /* Re */
 149         0, /* Rs */
 150         ARGS_DELIM, /* Sc */
 151         0, /* So */
 152         ARGS_DELIM, /* Sq */
 153         0, /* Sm */
 154         ARGS_DELIM, /* Sx */
 155         ARGS_DELIM, /* Sy */
 156         ARGS_DELIM, /* Tn */
 157         ARGS_DELIM, /* Ux */
 158         ARGS_DELIM, /* Xc */
 159         0, /* Xo */
 160         0, /* Fo */
 161         0, /* Fc */
 162         0, /* Oo */
 163         ARGS_DELIM, /* Oc */
 164         0, /* Bk */
 165         0, /* Ek */
 166         0, /* Bt */
 167         0, /* Hf */
 168         0, /* Fr */
 169         0, /* Ud */
 170 };
 171
 172
 173 static int
 174 perr(struct mdoc *mdoc, int line, int pos, int code)
 175 {
 176         int              c;
 177
 178         switch (code) {
 179         case (EQUOTTERM):
 180                 c = mdoc_perr(mdoc, line, pos,
 181                                 "unterminated quoted parameter");
 182                 break;
 183         case (EARGVAL):
 184                 c = mdoc_perr(mdoc, line, pos,
 185                                 "argument requires a value");
 186                 break;
 187         case (EARGMANY):
 188                 c = mdoc_perr(mdoc, line, pos,
 189                                 "too many values for argument");
 190                 break;
 191         default:
 192                 abort();
 193                 /* NOTREACHED */
 194         }
 195         return(c);
 196 }
 197
 198
 199 static int
 200 pwarn(struct mdoc *mdoc, int line, int pos, int code)
 201 {
 202         int              c;
 203
 204         switch (code) {
 205         case (WQUOTPARM):
 206                 c = mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
 207                                 "unexpected quoted parameter");
 208                 break;
 209         case (WARGVPARM):
 210                 c = mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
 211                                 "argument-like parameter");
 212                 break;
 213         case (WCOLEMPTY):
 214                 c = mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
 215                                 "last list column is empty");
 216                 break;
 217         case (WTAILWS):
 218                 c = mdoc_pwarn(mdoc, line, pos, WARN_COMPAT,
 219                                 "trailing whitespace");
 220                 break;
 221         default:
 222                 abort();
 223                 /* NOTREACHED */
 224         }
 225         return(c);
 226 }
 227
 228
 229 int
 230 mdoc_args(struct mdoc *mdoc, int line,
 231                 int *pos, char *buf, int tok, char **v)
 232 {
 233         int               fl, c, i;
 234         struct mdoc_node *n;
 235
 236         fl = (0 == tok) ? 0 : mdoc_argflags[tok];
 237
 238         /*
 239          * First see if we should use TABSEP (Bl -column).  This
 240          * invalidates the use of ARGS_DELIM.
 241          */
 242
 243         if (MDOC_It == tok) {
 244                 for (n = mdoc->last; n; n = n->parent)
 245                         if (MDOC_BLOCK == n->type)
 246                                 if (MDOC_Bl == n->tok)
 247                                         break;
 248                 assert(n);
 249                 c = (int)n->data.block.argc;
 250                 assert(c > 0);
 251
 252                 /* LINTED */
 253                 for (i = 0; i < c; i++) {
 254                         if (MDOC_Column != n->data.block.argv[i].arg)
 255                                 continue;
 256                         fl |= ARGS_TABSEP;
 257                         fl &= ~ARGS_DELIM;
 258                         break;
 259                 }
 260         }
 261
 262         return(args(mdoc, line, pos, buf, fl, v));
 263 }
 264
 265
 266 static int
 267 args(struct mdoc *mdoc, int line,
 268                 int *pos, char *buf, int fl, char **v)
 269 {
 270         int               i, c;
 271         char             *p, *pp;
 272
 273         assert(*pos > 0);
 274
 275         if (0 == buf[*pos])
 276                 return(ARGS_EOLN);
 277
 278         if ('\"' == buf[*pos] && ! (fl & ARGS_QUOTED))
 279                 if ( ! pwarn(mdoc, line, *pos, WQUOTPARM))
 280                         return(ARGS_ERROR);
 281
 282         if ('-' == buf[*pos])
 283                 if ( ! pwarn(mdoc, line, *pos, WARGVPARM))
 284                         return(ARGS_ERROR);
 285
 286         /*
 287          * If the first character is a delimiter and we're to look for
 288          * delimited strings, then pass down the buffer seeing if it
 289          * follows the pattern of [[::delim::][ ]+]+.
 290          */
 291
 292         if ((fl & ARGS_DELIM) && mdoc_iscdelim(buf[*pos])) {
 293                 for (i = *pos; (c = buf[i]); ) {
 294                         if ( ! mdoc_iscdelim(c))
 295                                 break;
 296                         i++;
 297                         if (0 == buf[i] || ! isspace(c))
 298                                 break;
 299                         i++;
 300                         while (buf[i] && isspace(c))
 301                                 i++;
 302                 }
 303                 if (0 == buf[i]) {
 304                         *v = &buf[*pos];
 305                         return(ARGS_PUNCT);
 306                 }
 307         }
 308
 309         /* First parse non-quoted strings. */
 310
 311         if ('\"' != buf[*pos] || ! (ARGS_QUOTED & fl)) {
 312                 *v = &buf[*pos];
 313
 314                 /*
 315                  * Thar be dragons here!  If we're tab-separated, search
 316                  * ahead for either a tab or the `Ta' macro.  If a tab
 317                  * is detected, it mustn't be escaped; if a `Ta' is
 318                  * detected, it must be space-buffered before and after.
 319                  * If either of these hold true, then prune out the
 320                  * extra spaces and call it an argument.
 321                  */
 322
 323                 if (ARGS_TABSEP & fl) {
 324                         /* Scan ahead to unescaped tab. */
 325
 326                         for (p = *v; ; p++) {
 327                                 if (NULL == (p = strchr(p, '\t')))
 328                                         break;
 329                                 if (p == *v)
 330                                         break;
 331                                 if ('\\' != *(p - 1))
 332                                         break;
 333                         }
 334
 335                         /* Scan ahead to unescaped `Ta'. */
 336
 337                         for (pp = *v; ; pp++) {
 338                                 if (NULL == (pp = strstr(pp, "Ta")))
 339                                         break;
 340                                 if (pp > *v && ' ' != *(pp - 1))
 341                                         continue;
 342                                 if (' ' == *(pp + 2) || 0 == *(pp + 2))
 343                                         break;
 344                         }
 345
 346                         /* Choose delimiter tab/Ta. */
 347
 348                         if (p && pp)
 349                                 p = (p < pp ? p : pp);
 350                         else if ( ! p && pp)
 351                                 p = pp;
 352
 353                         /* Strip delimiter's preceding whitespace. */
 354
 355                         if (p && p > *v) {
 356                                 pp = p - 1;
 357                                 while (pp > *v && ' ' == *pp)
 358                                         pp--;
 359                                 if (pp == *v && ' ' == *pp)
 360                                         *pp = 0;
 361                                 else if (' ' == *pp)
 362                                         *(pp + 1) = 0;
 363                         }
 364
 365                         /* ...in- and proceding whitespace. */
 366
 367                         if (p && ('\t' != *p)) {
 368                                 *p++ = 0;
 369                                 *p++ = 0;
 370                         } else if (p)
 371                                 *p++ = 0;
 372
 373                         if (p) {
 374                                 while (' ' == *p)
 375                                         p++;
 376                                 if (0 != *p)
 377                                         *(p - 1) = 0;
 378                                 *pos += p - *v;
 379                         }
 380
 381                         if (p && 0 == *p)
 382                                 if ( ! pwarn(mdoc, line, *pos, WCOLEMPTY))
 383                                         return(0);
 384                         if (p && 0 == *p && p > *v && ' ' == *(p - 1))
 385                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 386                                         return(0);
 387
 388                         if (p)
 389                                 return(ARGS_WORD);
 390
 391                         /* Configure the eoln case, too. */
 392
 393                         p = strchr(*v, 0);
 394                         assert(p);
 395
 396                         if (p > *v && ' ' == *(p - 1))
 397                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 398                                         return(0);
 399                         *pos += p - *v;
 400
 401                         return(ARGS_WORD);
 402                 }
 403
 404                 /* Do non-tabsep look-ahead here. */
 405
 406                 if ( ! (ARGS_TABSEP & fl))
 407                         while ((c = buf[*pos])) {
 408                                 if (isspace(c))
 409                                         if ('\\' != buf[*pos - 1])
 410                                                 break;
 411                                 (*pos)++;
 412                         }
 413
 414                 if (0 == buf[*pos])
 415                         return(ARGS_WORD);
 416
 417                 buf[(*pos)++] = 0;
 418
 419                 if (0 == buf[*pos])
 420                         return(ARGS_WORD);
 421
 422                 if ( ! (ARGS_TABSEP & fl))
 423                         while (buf[*pos] && isspace((int)buf[*pos]))
 424                                 (*pos)++;
 425
 426                 if (buf[*pos])
 427                         return(ARGS_WORD);
 428
 429                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 430                         return(ARGS_ERROR);
 431
 432                 return(ARGS_WORD);
 433         }
 434
 435         /*
 436          * If we're a quoted string (and quoted strings are allowed),
 437          * then parse ahead to the next quote.  If none's found, it's an
 438          * error.  After, parse to the next word.
 439          */
 440
 441         *v = &buf[++(*pos)];
 442
 443         while (buf[*pos] && '\"' != buf[*pos])
 444                 (*pos)++;
 445
 446         if (0 == buf[*pos]) {
 447                 (void)perr(mdoc, line, *pos, EQUOTTERM);
 448                 return(ARGS_ERROR);
 449         }
 450
 451         buf[(*pos)++] = 0;
 452         if (0 == buf[*pos])
 453                 return(ARGS_QWORD);
 454
 455         while (buf[*pos] && isspace((int)buf[*pos]))
 456                 (*pos)++;
 457
 458         if (buf[*pos])
 459                 return(ARGS_QWORD);
 460
 461         if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 462                 return(ARGS_ERROR);
 463
 464         return(ARGS_QWORD);
 465 }
 466
 467
 468 static int
 469 lookup(int tok, const char *argv)
 470 {
 471
 472         switch (tok) {
 473         case (MDOC_An):
 474                 if (xstrcmp(argv, "split"))
 475                         return(MDOC_Split);
 476                 else if (xstrcmp(argv, "nosplit"))
 477                         return(MDOC_Nosplit);
 478                 break;
 479
 480         case (MDOC_Bd):
 481                 if (xstrcmp(argv, "ragged"))
 482                         return(MDOC_Ragged);
 483                 else if (xstrcmp(argv, "unfilled"))
 484                         return(MDOC_Unfilled);
 485                 else if (xstrcmp(argv, "filled"))
 486                         return(MDOC_Filled);
 487                 else if (xstrcmp(argv, "literal"))
 488                         return(MDOC_Literal);
 489                 else if (xstrcmp(argv, "file"))
 490                         return(MDOC_File);
 491                 else if (xstrcmp(argv, "offset"))
 492                         return(MDOC_Offset);
 493                 break;
 494
 495         case (MDOC_Bf):
 496                 if (xstrcmp(argv, "emphasis"))
 497                         return(MDOC_Emphasis);
 498                 else if (xstrcmp(argv, "literal"))
 499                         return(MDOC_Literal);
 500                 else if (xstrcmp(argv, "symbolic"))
 501                         return(MDOC_Symbolic);
 502                 break;
 503
 504         case (MDOC_Bk):
 505                 if (xstrcmp(argv, "words"))
 506                         return(MDOC_Words);
 507                 break;
 508
 509         case (MDOC_Bl):
 510                 if (xstrcmp(argv, "bullet"))
 511                         return(MDOC_Bullet);
 512                 else if (xstrcmp(argv, "dash"))
 513                         return(MDOC_Dash);
 514                 else if (xstrcmp(argv, "hyphen"))
 515                         return(MDOC_Hyphen);
 516                 else if (xstrcmp(argv, "item"))
 517                         return(MDOC_Item);
 518                 else if (xstrcmp(argv, "enum"))
 519                         return(MDOC_Enum);
 520                 else if (xstrcmp(argv, "tag"))
 521                         return(MDOC_Tag);
 522                 else if (xstrcmp(argv, "diag"))
 523                         return(MDOC_Diag);
 524                 else if (xstrcmp(argv, "hang"))
 525                         return(MDOC_Hang);
 526                 else if (xstrcmp(argv, "ohang"))
 527                         return(MDOC_Ohang);
 528                 else if (xstrcmp(argv, "inset"))
 529                         return(MDOC_Inset);
 530                 else if (xstrcmp(argv, "column"))
 531                         return(MDOC_Column);
 532                 else if (xstrcmp(argv, "width"))
 533                         return(MDOC_Width);
 534                 else if (xstrcmp(argv, "offset"))
 535                         return(MDOC_Offset);
 536                 else if (xstrcmp(argv, "compact"))
 537                         return(MDOC_Compact);
 538                 break;
 539
 540         case (MDOC_Rv):
 541                 /* FALLTHROUGH */
 542         case (MDOC_Ex):
 543                 if (xstrcmp(argv, "std"))
 544                         return(MDOC_Std);
 545                 break;
 546
 547         case (MDOC_St):
 548                 if (xstrcmp(argv, "p1003.1-88"))
 549                         return(MDOC_p1003_1_88);
 550                 else if (xstrcmp(argv, "p1003.1-90"))
 551                         return(MDOC_p1003_1_90);
 552                 else if (xstrcmp(argv, "p1003.1-96"))
 553                         return(MDOC_p1003_1_96);
 554                 else if (xstrcmp(argv, "p1003.1-2001"))
 555                         return(MDOC_p1003_1_2001);
 556                 else if (xstrcmp(argv, "p1003.1-2004"))
 557                         return(MDOC_p1003_1_2004);
 558                 else if (xstrcmp(argv, "p1003.1"))
 559                         return(MDOC_p1003_1);
 560                 else if (xstrcmp(argv, "p1003.1b"))
 561                         return(MDOC_p1003_1b);
 562                 else if (xstrcmp(argv, "p1003.1b-93"))
 563                         return(MDOC_p1003_1b_93);
 564                 else if (xstrcmp(argv, "p1003.1c-95"))
 565                         return(MDOC_p1003_1c_95);
 566                 else if (xstrcmp(argv, "p1003.1g-2000"))
 567                         return(MDOC_p1003_1g_2000);
 568                 else if (xstrcmp(argv, "p1003.2-92"))
 569                         return(MDOC_p1003_2_92);
 570                 else if (xstrcmp(argv, "p1003.2-95"))
 571                         return(MDOC_p1387_2_95);
 572                 else if (xstrcmp(argv, "p1003.2"))
 573                         return(MDOC_p1003_2);
 574                 else if (xstrcmp(argv, "p1387.2-95"))
 575                         return(MDOC_p1387_2);
 576                 else if (xstrcmp(argv, "isoC-90"))
 577                         return(MDOC_isoC_90);
 578                 else if (xstrcmp(argv, "isoC-amd1"))
 579                         return(MDOC_isoC_amd1);
 580                 else if (xstrcmp(argv, "isoC-tcor1"))
 581                         return(MDOC_isoC_tcor1);
 582                 else if (xstrcmp(argv, "isoC-tcor2"))
 583                         return(MDOC_isoC_tcor2);
 584                 else if (xstrcmp(argv, "isoC-99"))
 585                         return(MDOC_isoC_99);
 586                 else if (xstrcmp(argv, "ansiC"))
 587                         return(MDOC_ansiC);
 588                 else if (xstrcmp(argv, "ansiC-89"))
 589                         return(MDOC_ansiC_89);
 590                 else if (xstrcmp(argv, "ansiC-99"))
 591                         return(MDOC_ansiC_99);
 592                 else if (xstrcmp(argv, "ieee754"))
 593                         return(MDOC_ieee754);
 594                 else if (xstrcmp(argv, "iso8802-3"))
 595                         return(MDOC_iso8802_3);
 596                 else if (xstrcmp(argv, "xpg3"))
 597                         return(MDOC_xpg3);
 598                 else if (xstrcmp(argv, "xpg4"))
 599                         return(MDOC_xpg4);
 600                 else if (xstrcmp(argv, "xpg4.2"))
 601                         return(MDOC_xpg4_2);
 602                 else if (xstrcmp(argv, "xpg4.3"))
 603                         return(MDOC_xpg4_3);
 604                 else if (xstrcmp(argv, "xbd5"))
 605                         return(MDOC_xbd5);
 606                 else if (xstrcmp(argv, "xcu5"))
 607                         return(MDOC_xcu5);
 608                 else if (xstrcmp(argv, "xsh5"))
 609                         return(MDOC_xsh5);
 610                 else if (xstrcmp(argv, "xns5"))
 611                         return(MDOC_xns5);
 612                 else if (xstrcmp(argv, "xns5.2d2.0"))
 613                         return(MDOC_xns5_2d2_0);
 614                 else if (xstrcmp(argv, "xcurses4.2"))
 615                         return(MDOC_xcurses4_2);
 616                 else if (xstrcmp(argv, "susv2"))
 617                         return(MDOC_susv2);
 618                 else if (xstrcmp(argv, "susv3"))
 619                         return(MDOC_susv3);
 620                 else if (xstrcmp(argv, "svid4"))
 621                         return(MDOC_svid4);
 622                 break;
 623
 624         default:
 625                 break;
 626         }
 627
 628         return(MDOC_ARG_MAX);
 629 }
 630
 631
 632 static int
 633 argv_multi(struct mdoc *mdoc, int line,
 634                 struct mdoc_arg *v, int *pos, char *buf)
 635 {
 636         int              c, ppos;
 637         char            *p;
 638
 639         v->sz = 0;
 640         v->value = xcalloc(MDOC_LINEARG_MAX, sizeof(char *));
 641
 642         ppos = *pos;
 643
 644         for (v->sz = 0; v->sz < MDOC_LINEARG_MAX; v->sz++) {
 645                 if ('-' == buf[*pos])
 646                         break;
 647                 c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 648                 if (ARGS_ERROR == c) {
 649                         free(v->value);
 650                         return(0);
 651                 } else if (ARGS_EOLN == c)
 652                         break;
 653                 v->value[v->sz] = p;
 654         }
 655
 656         if (0 < v->sz && v->sz < MDOC_LINEARG_MAX)
 657                 return(1);
 658
 659         free(v->value);
 660         if (0 == v->sz)
 661                 return(perr(mdoc, line, ppos, EARGVAL));
 662
 663         return(perr(mdoc, line, ppos, EARGMANY));
 664 }
 665
 666
 667 static int
 668 argv_single(struct mdoc *mdoc, int line,
 669                 struct mdoc_arg *v, int *pos, char *buf)
 670 {
 671         int              c, ppos;
 672         char            *p;
 673
 674         ppos = *pos;
 675
 676         c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 677         if (ARGS_ERROR == c)
 678                 return(0);
 679         if (ARGS_EOLN == c)
 680                 return(perr(mdoc, line, ppos,  EARGVAL));
 681
 682         v->sz = 1;
 683         v->value = xcalloc(1, sizeof(char *));
 684         v->value[0] = p;
 685         return(1);
 686 }
 687
 688
 689 static int
 690 argv(struct mdoc *mdoc, int line,
 691                 struct mdoc_arg *v, int *pos, char *buf)
 692 {
 693
 694         v->sz = 0;
 695         v->value = NULL;
 696
 697         switch (v->arg) {
 698         case(MDOC_Std):
 699                 /* FALLTHROUGH */
 700         case(MDOC_Width):
 701                 /* FALLTHROUGH */
 702         case(MDOC_Offset):
 703                 return(argv_single(mdoc, line, v, pos, buf));
 704         case(MDOC_Column):
 705                 return(argv_multi(mdoc, line, v, pos, buf));
 706         default:
 707                 break;
 708         }
 709
 710         return(1);
 711 }
 712
 713
 714 int
 715 mdoc_argv(struct mdoc *mdoc, int line, int tok,
 716                 struct mdoc_arg *v, int *pos, char *buf)
 717 {
 718         int              i, ppos;
 719         char            *p;
 720
 721         (void)memset(v, 0, sizeof(struct mdoc_arg));
 722
 723         if (0 == buf[*pos])
 724                 return(ARGV_EOLN);
 725
 726         assert( ! isspace((int)buf[*pos]));
 727
 728         if ('-' != buf[*pos])
 729                 return(ARGV_WORD);
 730
 731         i = *pos;
 732         p = &buf[++(*pos)];
 733
 734         v->line = line;
 735         v->pos = *pos;
 736
 737         assert(*pos > 0);
 738
 739         /* LINTED */
 740         while (buf[*pos]) {
 741                 if (isspace((int)buf[*pos]))
 742                         if ('\\' != buf[*pos - 1])
 743                                 break;
 744                 (*pos)++;
 745         }
 746
 747         if (buf[*pos])
 748                 buf[(*pos)++] = 0;
 749
 750         if (MDOC_ARG_MAX == (v->arg = lookup(tok, p))) {
 751                 if ( ! pwarn(mdoc, line, i, WARGVPARM))
 752                         return(ARGV_ERROR);
 753                 return(ARGV_WORD);
 754         }
 755
 756         while (buf[*pos] && isspace((int)buf[*pos]))
 757                 (*pos)++;
 758
 759         /* FIXME: whitespace if no value. */
 760
 761         ppos = *pos;
 762         if ( ! argv(mdoc, line, v, pos, buf))
 763                 return(ARGV_ERROR);
 764
 765         return(ARGV_ARG);
 766 }
 767
 768
 769 void
 770 mdoc_argv_free(int sz, struct mdoc_arg *arg)
 771 {
 772         int              i;
 773
 774         for (i = 0; i < sz; i++) {
 775                 if (0 == arg[i].sz) {
 776                         assert(NULL == arg[i].value);
 777                         continue;
 778                 }
 779                 assert(arg[i].value);
 780                 free(arg[i].value);
 781         }
 782 }
 783