argv.c

   1 /* $Id: argv.c,v 1.33 2009/02/27 09:39:40 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              argv_a2arg(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         0, /* 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;
 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; buf[i]; ) {
 294                         if ( ! mdoc_iscdelim(buf[i]))
 295                                 break;
 296                         i++;
 297                         while (buf[i] && isspace((int)buf[i]))
 298                                 i++;
 299                 }
 300                 if (0 == buf[i]) {
 301                         *v = &buf[*pos];
 302                         return(ARGS_PUNCT);
 303                 }
 304         }
 305
 306         /* First parse non-quoted strings. */
 307
 308         if ('\"' != buf[*pos] || ! (ARGS_QUOTED & fl)) {
 309                 *v = &buf[*pos];
 310
 311                 /*
 312                  * Thar be dragons here!  If we're tab-separated, search
 313                  * ahead for either a tab or the `Ta' macro.  If a tab
 314                  * is detected, it mustn't be escaped; if a `Ta' is
 315                  * detected, it must be space-buffered before and after.
 316                  * If either of these hold true, then prune out the
 317                  * extra spaces and call it an argument.
 318                  */
 319
 320                 if (ARGS_TABSEP & fl) {
 321                         /* Scan ahead to unescaped tab. */
 322
 323                         for (p = *v; ; p++) {
 324                                 if (NULL == (p = strchr(p, '\t')))
 325                                         break;
 326                                 if (p == *v)
 327                                         break;
 328                                 if ('\\' != *(p - 1))
 329                                         break;
 330                         }
 331
 332                         /* Scan ahead to unescaped `Ta'. */
 333
 334                         for (pp = *v; ; pp++) {
 335                                 if (NULL == (pp = strstr(pp, "Ta")))
 336                                         break;
 337                                 if (pp > *v && ' ' != *(pp - 1))
 338                                         continue;
 339                                 if (' ' == *(pp + 2) || 0 == *(pp + 2))
 340                                         break;
 341                         }
 342
 343                         /* Choose delimiter tab/Ta. */
 344
 345                         if (p && pp)
 346                                 p = (p < pp ? p : pp);
 347                         else if ( ! p && pp)
 348                                 p = pp;
 349
 350                         /* Strip delimiter's preceding whitespace. */
 351
 352                         if (p && p > *v) {
 353                                 pp = p - 1;
 354                                 while (pp > *v && ' ' == *pp)
 355                                         pp--;
 356                                 if (pp == *v && ' ' == *pp)
 357                                         *pp = 0;
 358                                 else if (' ' == *pp)
 359                                         *(pp + 1) = 0;
 360                         }
 361
 362                         /* ...in- and proceding whitespace. */
 363
 364                         if (p && ('\t' != *p)) {
 365                                 *p++ = 0;
 366                                 *p++ = 0;
 367                         } else if (p)
 368                                 *p++ = 0;
 369
 370                         if (p) {
 371                                 while (' ' == *p)
 372                                         p++;
 373                                 if (0 != *p)
 374                                         *(p - 1) = 0;
 375                                 *pos += (int)(p - *v);
 376                         }
 377
 378                         if (p && 0 == *p)
 379                                 if ( ! pwarn(mdoc, line, *pos, WCOLEMPTY))
 380                                         return(0);
 381                         if (p && 0 == *p && p > *v && ' ' == *(p - 1))
 382                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 383                                         return(0);
 384
 385                         if (p)
 386                                 return(ARGS_WORD);
 387
 388                         /* Configure the eoln case, too. */
 389
 390                         p = strchr(*v, 0);
 391                         assert(p);
 392
 393                         if (p > *v && ' ' == *(p - 1))
 394                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 395                                         return(0);
 396                         *pos += (int)(p - *v);
 397
 398                         return(ARGS_WORD);
 399                 }
 400
 401                 /* Do non-tabsep look-ahead here. */
 402
 403                 if ( ! (ARGS_TABSEP & fl))
 404                         while (buf[*pos]) {
 405                                 if (isspace((int)buf[*pos]))
 406                                         if ('\\' != buf[*pos - 1])
 407                                                 break;
 408                                 (*pos)++;
 409                         }
 410
 411                 if (0 == buf[*pos])
 412                         return(ARGS_WORD);
 413
 414                 buf[(*pos)++] = 0;
 415
 416                 if (0 == buf[*pos])
 417                         return(ARGS_WORD);
 418
 419                 if ( ! (ARGS_TABSEP & fl))
 420                         while (buf[*pos] && isspace((int)buf[*pos]))
 421                                 (*pos)++;
 422
 423                 if (buf[*pos])
 424                         return(ARGS_WORD);
 425
 426                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 427                         return(ARGS_ERROR);
 428
 429                 return(ARGS_WORD);
 430         }
 431
 432         /*
 433          * If we're a quoted string (and quoted strings are allowed),
 434          * then parse ahead to the next quote.  If none's found, it's an
 435          * error.  After, parse to the next word.
 436          */
 437
 438         *v = &buf[++(*pos)];
 439
 440         while (buf[*pos] && '\"' != buf[*pos])
 441                 (*pos)++;
 442
 443         if (0 == buf[*pos]) {
 444                 (void)perr(mdoc, line, *pos, EQUOTTERM);
 445                 return(ARGS_ERROR);
 446         }
 447
 448         buf[(*pos)++] = 0;
 449         if (0 == buf[*pos])
 450                 return(ARGS_QWORD);
 451
 452         while (buf[*pos] && isspace((int)buf[*pos]))
 453                 (*pos)++;
 454
 455         if (buf[*pos])
 456                 return(ARGS_QWORD);
 457
 458         if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 459                 return(ARGS_ERROR);
 460
 461         return(ARGS_QWORD);
 462 }
 463
 464
 465 static int
 466 argv_a2arg(int tok, const char *argv)
 467 {
 468
 469         switch (tok) {
 470         case (MDOC_An):
 471                 if (xstrcmp(argv, "split"))
 472                         return(MDOC_Split);
 473                 else if (xstrcmp(argv, "nosplit"))
 474                         return(MDOC_Nosplit);
 475                 break;
 476
 477         case (MDOC_Bd):
 478                 if (xstrcmp(argv, "ragged"))
 479                         return(MDOC_Ragged);
 480                 else if (xstrcmp(argv, "unfilled"))
 481                         return(MDOC_Unfilled);
 482                 else if (xstrcmp(argv, "filled"))
 483                         return(MDOC_Filled);
 484                 else if (xstrcmp(argv, "literal"))
 485                         return(MDOC_Literal);
 486                 else if (xstrcmp(argv, "file"))
 487                         return(MDOC_File);
 488                 else if (xstrcmp(argv, "offset"))
 489                         return(MDOC_Offset);
 490                 break;
 491
 492         case (MDOC_Bf):
 493                 if (xstrcmp(argv, "emphasis"))
 494                         return(MDOC_Emphasis);
 495                 else if (xstrcmp(argv, "literal"))
 496                         return(MDOC_Literal);
 497                 else if (xstrcmp(argv, "symbolic"))
 498                         return(MDOC_Symbolic);
 499                 break;
 500
 501         case (MDOC_Bk):
 502                 if (xstrcmp(argv, "words"))
 503                         return(MDOC_Words);
 504                 break;
 505
 506         case (MDOC_Bl):
 507                 if (xstrcmp(argv, "bullet"))
 508                         return(MDOC_Bullet);
 509                 else if (xstrcmp(argv, "dash"))
 510                         return(MDOC_Dash);
 511                 else if (xstrcmp(argv, "hyphen"))
 512                         return(MDOC_Hyphen);
 513                 else if (xstrcmp(argv, "item"))
 514                         return(MDOC_Item);
 515                 else if (xstrcmp(argv, "enum"))
 516                         return(MDOC_Enum);
 517                 else if (xstrcmp(argv, "tag"))
 518                         return(MDOC_Tag);
 519                 else if (xstrcmp(argv, "diag"))
 520                         return(MDOC_Diag);
 521                 else if (xstrcmp(argv, "hang"))
 522                         return(MDOC_Hang);
 523                 else if (xstrcmp(argv, "ohang"))
 524                         return(MDOC_Ohang);
 525                 else if (xstrcmp(argv, "inset"))
 526                         return(MDOC_Inset);
 527                 else if (xstrcmp(argv, "column"))
 528                         return(MDOC_Column);
 529                 else if (xstrcmp(argv, "width"))
 530                         return(MDOC_Width);
 531                 else if (xstrcmp(argv, "offset"))
 532                         return(MDOC_Offset);
 533                 else if (xstrcmp(argv, "compact"))
 534                         return(MDOC_Compact);
 535                 break;
 536
 537         case (MDOC_Rv):
 538                 /* FALLTHROUGH */
 539         case (MDOC_Ex):
 540                 if (xstrcmp(argv, "std"))
 541                         return(MDOC_Std);
 542                 break;
 543
 544         case (MDOC_St):
 545                 if (xstrcmp(argv, "p1003.1-88"))
 546                         return(MDOC_p1003_1_88);
 547                 else if (xstrcmp(argv, "p1003.1-90"))
 548                         return(MDOC_p1003_1_90);
 549                 else if (xstrcmp(argv, "p1003.1-96"))
 550                         return(MDOC_p1003_1_96);
 551                 else if (xstrcmp(argv, "p1003.1-2001"))
 552                         return(MDOC_p1003_1_2001);
 553                 else if (xstrcmp(argv, "p1003.1-2004"))
 554                         return(MDOC_p1003_1_2004);
 555                 else if (xstrcmp(argv, "p1003.1"))
 556                         return(MDOC_p1003_1);
 557                 else if (xstrcmp(argv, "p1003.1b"))
 558                         return(MDOC_p1003_1b);
 559                 else if (xstrcmp(argv, "p1003.1b-93"))
 560                         return(MDOC_p1003_1b_93);
 561                 else if (xstrcmp(argv, "p1003.1c-95"))
 562                         return(MDOC_p1003_1c_95);
 563                 else if (xstrcmp(argv, "p1003.1g-2000"))
 564                         return(MDOC_p1003_1g_2000);
 565                 else if (xstrcmp(argv, "p1003.2-92"))
 566                         return(MDOC_p1003_2_92);
 567                 else if (xstrcmp(argv, "p1003.2-95"))
 568                         return(MDOC_p1387_2_95);
 569                 else if (xstrcmp(argv, "p1003.2"))
 570                         return(MDOC_p1003_2);
 571                 else if (xstrcmp(argv, "p1387.2-95"))
 572                         return(MDOC_p1387_2);
 573                 else if (xstrcmp(argv, "isoC-90"))
 574                         return(MDOC_isoC_90);
 575                 else if (xstrcmp(argv, "isoC-amd1"))
 576                         return(MDOC_isoC_amd1);
 577                 else if (xstrcmp(argv, "isoC-tcor1"))
 578                         return(MDOC_isoC_tcor1);
 579                 else if (xstrcmp(argv, "isoC-tcor2"))
 580                         return(MDOC_isoC_tcor2);
 581                 else if (xstrcmp(argv, "isoC-99"))
 582                         return(MDOC_isoC_99);
 583                 else if (xstrcmp(argv, "ansiC"))
 584                         return(MDOC_ansiC);
 585                 else if (xstrcmp(argv, "ansiC-89"))
 586                         return(MDOC_ansiC_89);
 587                 else if (xstrcmp(argv, "ansiC-99"))
 588                         return(MDOC_ansiC_99);
 589                 else if (xstrcmp(argv, "ieee754"))
 590                         return(MDOC_ieee754);
 591                 else if (xstrcmp(argv, "iso8802-3"))
 592                         return(MDOC_iso8802_3);
 593                 else if (xstrcmp(argv, "xpg3"))
 594                         return(MDOC_xpg3);
 595                 else if (xstrcmp(argv, "xpg4"))
 596                         return(MDOC_xpg4);
 597                 else if (xstrcmp(argv, "xpg4.2"))
 598                         return(MDOC_xpg4_2);
 599                 else if (xstrcmp(argv, "xpg4.3"))
 600                         return(MDOC_xpg4_3);
 601                 else if (xstrcmp(argv, "xbd5"))
 602                         return(MDOC_xbd5);
 603                 else if (xstrcmp(argv, "xcu5"))
 604                         return(MDOC_xcu5);
 605                 else if (xstrcmp(argv, "xsh5"))
 606                         return(MDOC_xsh5);
 607                 else if (xstrcmp(argv, "xns5"))
 608                         return(MDOC_xns5);
 609                 else if (xstrcmp(argv, "xns5.2d2.0"))
 610                         return(MDOC_xns5_2d2_0);
 611                 else if (xstrcmp(argv, "xcurses4.2"))
 612                         return(MDOC_xcurses4_2);
 613                 else if (xstrcmp(argv, "susv2"))
 614                         return(MDOC_susv2);
 615                 else if (xstrcmp(argv, "susv3"))
 616                         return(MDOC_susv3);
 617                 else if (xstrcmp(argv, "svid4"))
 618                         return(MDOC_svid4);
 619                 break;
 620
 621         default:
 622                 break;
 623         }
 624
 625         return(MDOC_ARG_MAX);
 626 }
 627
 628
 629 static int
 630 argv_multi(struct mdoc *mdoc, int line,
 631                 struct mdoc_arg *v, int *pos, char *buf)
 632 {
 633         int              c, ppos;
 634         char            *p;
 635
 636         v->sz = 0;
 637         v->value = xcalloc(MDOC_LINEARG_MAX, sizeof(char *));
 638
 639         ppos = *pos;
 640
 641         for (v->sz = 0; v->sz < MDOC_LINEARG_MAX; v->sz++) {
 642                 if ('-' == buf[*pos])
 643                         break;
 644                 c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 645                 if (ARGS_ERROR == c) {
 646                         free(v->value);
 647                         return(0);
 648                 } else if (ARGS_EOLN == c)
 649                         break;
 650                 v->value[(int)v->sz] = p;
 651         }
 652
 653         if (0 < v->sz && v->sz < MDOC_LINEARG_MAX)
 654                 return(1);
 655
 656         free(v->value);
 657         if (0 == v->sz)
 658                 return(perr(mdoc, line, ppos, EARGVAL));
 659
 660         return(perr(mdoc, line, ppos, EARGMANY));
 661 }
 662
 663
 664 static int
 665 argv_single(struct mdoc *mdoc, int line,
 666                 struct mdoc_arg *v, int *pos, char *buf)
 667 {
 668         int              c, ppos;
 669         char            *p;
 670
 671         ppos = *pos;
 672
 673         c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 674         if (ARGS_ERROR == c)
 675                 return(0);
 676         if (ARGS_EOLN == c)
 677                 return(perr(mdoc, line, ppos,  EARGVAL));
 678
 679         v->sz = 1;
 680         v->value = xcalloc(1, sizeof(char *));
 681         v->value[0] = p;
 682         return(1);
 683 }
 684
 685
 686 static int
 687 argv(struct mdoc *mdoc, int line,
 688                 struct mdoc_arg *v, int *pos, char *buf)
 689 {
 690
 691         v->sz = 0;
 692         v->value = NULL;
 693
 694         switch (v->arg) {
 695         case(MDOC_Std):
 696                 /* FALLTHROUGH */
 697         case(MDOC_Width):
 698                 /* FALLTHROUGH */
 699         case(MDOC_Offset):
 700                 return(argv_single(mdoc, line, v, pos, buf));
 701         case(MDOC_Column):
 702                 return(argv_multi(mdoc, line, v, pos, buf));
 703         default:
 704                 break;
 705         }
 706
 707         return(1);
 708 }
 709
 710
 711 int
 712 mdoc_argv(struct mdoc *mdoc, int line, int tok,
 713                 struct mdoc_arg *v, int *pos, char *buf)
 714 {
 715         int              i;
 716         char            *p;
 717
 718         (void)memset(v, 0, sizeof(struct mdoc_arg));
 719
 720         if (0 == buf[*pos])
 721                 return(ARGV_EOLN);
 722
 723         assert( ! isspace((int)buf[*pos]));
 724
 725         if ('-' != buf[*pos])
 726                 return(ARGV_WORD);
 727
 728         i = *pos;
 729         p = &buf[++(*pos)];
 730
 731         v->line = line;
 732         v->pos = *pos;
 733
 734         assert(*pos > 0);
 735
 736         /* LINTED */
 737         while (buf[*pos]) {
 738                 if (isspace((int)buf[*pos]))
 739                         if ('\\' != buf[*pos - 1])
 740                                 break;
 741                 (*pos)++;
 742         }
 743
 744         if (buf[*pos])
 745                 buf[(*pos)++] = 0;
 746
 747         if (MDOC_ARG_MAX == (v->arg = argv_a2arg(tok, p))) {
 748                 if ( ! pwarn(mdoc, line, i, WARGVPARM))
 749                         return(ARGV_ERROR);
 750                 return(ARGV_WORD);
 751         }
 752
 753         while (buf[*pos] && isspace((int)buf[*pos]))
 754                 (*pos)++;
 755
 756         /* FIXME: whitespace if no value. */
 757
 758         if ( ! argv(mdoc, line, v, pos, buf))
 759                 return(ARGV_ERROR);
 760
 761         return(ARGV_ARG);
 762 }
 763
 764
 765 void
 766 mdoc_argv_free(int sz, struct mdoc_arg *arg)
 767 {
 768         int              i;
 769
 770         for (i = 0; i < sz; i++) {
 771                 if (0 == arg[i].sz) {
 772                         assert(NULL == arg[i].value);
 773                         continue;
 774                 }
 775                 assert(arg[i].value);
 776                 free(arg[i].value);
 777         }
 778 }
 779