argv.c

   1 /* $Id: argv.c,v 1.34 2009/02/28 12:16:02 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                         /* There must be at least one space... */
 298                         if (0 == buf[i] || ! isspace((int)buf[i]))
 299                                 break;
 300                         i++;
 301                         while (buf[i] && isspace((int)buf[i]))
 302                                 i++;
 303                 }
 304                 if (0 == buf[i]) {
 305                         *v = &buf[*pos];
 306                         return(ARGS_PUNCT);
 307                 }
 308         }
 309
 310         /* First parse non-quoted strings. */
 311
 312         if ('\"' != buf[*pos] || ! (ARGS_QUOTED & fl)) {
 313                 *v = &buf[*pos];
 314
 315                 /*
 316                  * Thar be dragons here!  If we're tab-separated, search
 317                  * ahead for either a tab or the `Ta' macro.  If a tab
 318                  * is detected, it mustn't be escaped; if a `Ta' is
 319                  * detected, it must be space-buffered before and after.
 320                  * If either of these hold true, then prune out the
 321                  * extra spaces and call it an argument.
 322                  */
 323
 324                 if (ARGS_TABSEP & fl) {
 325                         /* Scan ahead to unescaped tab. */
 326
 327                         for (p = *v; ; p++) {
 328                                 if (NULL == (p = strchr(p, '\t')))
 329                                         break;
 330                                 if (p == *v)
 331                                         break;
 332                                 if ('\\' != *(p - 1))
 333                                         break;
 334                         }
 335
 336                         /* Scan ahead to unescaped `Ta'. */
 337
 338                         for (pp = *v; ; pp++) {
 339                                 if (NULL == (pp = strstr(pp, "Ta")))
 340                                         break;
 341                                 if (pp > *v && ' ' != *(pp - 1))
 342                                         continue;
 343                                 if (' ' == *(pp + 2) || 0 == *(pp + 2))
 344                                         break;
 345                         }
 346
 347                         /* Choose delimiter tab/Ta. */
 348
 349                         if (p && pp)
 350                                 p = (p < pp ? p : pp);
 351                         else if ( ! p && pp)
 352                                 p = pp;
 353
 354                         /* Strip delimiter's preceding whitespace. */
 355
 356                         if (p && p > *v) {
 357                                 pp = p - 1;
 358                                 while (pp > *v && ' ' == *pp)
 359                                         pp--;
 360                                 if (pp == *v && ' ' == *pp)
 361                                         *pp = 0;
 362                                 else if (' ' == *pp)
 363                                         *(pp + 1) = 0;
 364                         }
 365
 366                         /* ...in- and proceding whitespace. */
 367
 368                         if (p && ('\t' != *p)) {
 369                                 *p++ = 0;
 370                                 *p++ = 0;
 371                         } else if (p)
 372                                 *p++ = 0;
 373
 374                         if (p) {
 375                                 while (' ' == *p)
 376                                         p++;
 377                                 if (0 != *p)
 378                                         *(p - 1) = 0;
 379                                 *pos += (int)(p - *v);
 380                         }
 381
 382                         if (p && 0 == *p)
 383                                 if ( ! pwarn(mdoc, line, *pos, WCOLEMPTY))
 384                                         return(0);
 385                         if (p && 0 == *p && p > *v && ' ' == *(p - 1))
 386                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 387                                         return(0);
 388
 389                         if (p)
 390                                 return(ARGS_WORD);
 391
 392                         /* Configure the eoln case, too. */
 393
 394                         p = strchr(*v, 0);
 395                         assert(p);
 396
 397                         if (p > *v && ' ' == *(p - 1))
 398                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 399                                         return(0);
 400                         *pos += (int)(p - *v);
 401
 402                         return(ARGS_WORD);
 403                 }
 404
 405                 /* Do non-tabsep look-ahead here. */
 406
 407                 if ( ! (ARGS_TABSEP & fl))
 408                         while (buf[*pos]) {
 409                                 if (isspace((int)buf[*pos]))
 410                                         if ('\\' != buf[*pos - 1])
 411                                                 break;
 412                                 (*pos)++;
 413                         }
 414
 415                 if (0 == buf[*pos])
 416                         return(ARGS_WORD);
 417
 418                 buf[(*pos)++] = 0;
 419
 420                 if (0 == buf[*pos])
 421                         return(ARGS_WORD);
 422
 423                 if ( ! (ARGS_TABSEP & fl))
 424                         while (buf[*pos] && isspace((int)buf[*pos]))
 425                                 (*pos)++;
 426
 427                 if (buf[*pos])
 428                         return(ARGS_WORD);
 429
 430                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 431                         return(ARGS_ERROR);
 432
 433                 return(ARGS_WORD);
 434         }
 435
 436         /*
 437          * If we're a quoted string (and quoted strings are allowed),
 438          * then parse ahead to the next quote.  If none's found, it's an
 439          * error.  After, parse to the next word.
 440          */
 441
 442         *v = &buf[++(*pos)];
 443
 444         while (buf[*pos] && '\"' != buf[*pos])
 445                 (*pos)++;
 446
 447         if (0 == buf[*pos]) {
 448                 (void)perr(mdoc, line, *pos, EQUOTTERM);
 449                 return(ARGS_ERROR);
 450         }
 451
 452         buf[(*pos)++] = 0;
 453         if (0 == buf[*pos])
 454                 return(ARGS_QWORD);
 455
 456         while (buf[*pos] && isspace((int)buf[*pos]))
 457                 (*pos)++;
 458
 459         if (buf[*pos])
 460                 return(ARGS_QWORD);
 461
 462         if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 463                 return(ARGS_ERROR);
 464
 465         return(ARGS_QWORD);
 466 }
 467
 468
 469 static int
 470 argv_a2arg(int tok, const char *argv)
 471 {
 472
 473         switch (tok) {
 474         case (MDOC_An):
 475                 if (xstrcmp(argv, "split"))
 476                         return(MDOC_Split);
 477                 else if (xstrcmp(argv, "nosplit"))
 478                         return(MDOC_Nosplit);
 479                 break;
 480
 481         case (MDOC_Bd):
 482                 if (xstrcmp(argv, "ragged"))
 483                         return(MDOC_Ragged);
 484                 else if (xstrcmp(argv, "unfilled"))
 485                         return(MDOC_Unfilled);
 486                 else if (xstrcmp(argv, "filled"))
 487                         return(MDOC_Filled);
 488                 else if (xstrcmp(argv, "literal"))
 489                         return(MDOC_Literal);
 490                 else if (xstrcmp(argv, "file"))
 491                         return(MDOC_File);
 492                 else if (xstrcmp(argv, "offset"))
 493                         return(MDOC_Offset);
 494                 break;
 495
 496         case (MDOC_Bf):
 497                 if (xstrcmp(argv, "emphasis"))
 498                         return(MDOC_Emphasis);
 499                 else if (xstrcmp(argv, "literal"))
 500                         return(MDOC_Literal);
 501                 else if (xstrcmp(argv, "symbolic"))
 502                         return(MDOC_Symbolic);
 503                 break;
 504
 505         case (MDOC_Bk):
 506                 if (xstrcmp(argv, "words"))
 507                         return(MDOC_Words);
 508                 break;
 509
 510         case (MDOC_Bl):
 511                 if (xstrcmp(argv, "bullet"))
 512                         return(MDOC_Bullet);
 513                 else if (xstrcmp(argv, "dash"))
 514                         return(MDOC_Dash);
 515                 else if (xstrcmp(argv, "hyphen"))
 516                         return(MDOC_Hyphen);
 517                 else if (xstrcmp(argv, "item"))
 518                         return(MDOC_Item);
 519                 else if (xstrcmp(argv, "enum"))
 520                         return(MDOC_Enum);
 521                 else if (xstrcmp(argv, "tag"))
 522                         return(MDOC_Tag);
 523                 else if (xstrcmp(argv, "diag"))
 524                         return(MDOC_Diag);
 525                 else if (xstrcmp(argv, "hang"))
 526                         return(MDOC_Hang);
 527                 else if (xstrcmp(argv, "ohang"))
 528                         return(MDOC_Ohang);
 529                 else if (xstrcmp(argv, "inset"))
 530                         return(MDOC_Inset);
 531                 else if (xstrcmp(argv, "column"))
 532                         return(MDOC_Column);
 533                 else if (xstrcmp(argv, "width"))
 534                         return(MDOC_Width);
 535                 else if (xstrcmp(argv, "offset"))
 536                         return(MDOC_Offset);
 537                 else if (xstrcmp(argv, "compact"))
 538                         return(MDOC_Compact);
 539                 break;
 540
 541         case (MDOC_Rv):
 542                 /* FALLTHROUGH */
 543         case (MDOC_Ex):
 544                 if (xstrcmp(argv, "std"))
 545                         return(MDOC_Std);
 546                 break;
 547
 548         case (MDOC_St):
 549                 if (xstrcmp(argv, "p1003.1-88"))
 550                         return(MDOC_p1003_1_88);
 551                 else if (xstrcmp(argv, "p1003.1-90"))
 552                         return(MDOC_p1003_1_90);
 553                 else if (xstrcmp(argv, "p1003.1-96"))
 554                         return(MDOC_p1003_1_96);
 555                 else if (xstrcmp(argv, "p1003.1-2001"))
 556                         return(MDOC_p1003_1_2001);
 557                 else if (xstrcmp(argv, "p1003.1-2004"))
 558                         return(MDOC_p1003_1_2004);
 559                 else if (xstrcmp(argv, "p1003.1"))
 560                         return(MDOC_p1003_1);
 561                 else if (xstrcmp(argv, "p1003.1b"))
 562                         return(MDOC_p1003_1b);
 563                 else if (xstrcmp(argv, "p1003.1b-93"))
 564                         return(MDOC_p1003_1b_93);
 565                 else if (xstrcmp(argv, "p1003.1c-95"))
 566                         return(MDOC_p1003_1c_95);
 567                 else if (xstrcmp(argv, "p1003.1g-2000"))
 568                         return(MDOC_p1003_1g_2000);
 569                 else if (xstrcmp(argv, "p1003.2-92"))
 570                         return(MDOC_p1003_2_92);
 571                 else if (xstrcmp(argv, "p1003.2-95"))
 572                         return(MDOC_p1387_2_95);
 573                 else if (xstrcmp(argv, "p1003.2"))
 574                         return(MDOC_p1003_2);
 575                 else if (xstrcmp(argv, "p1387.2-95"))
 576                         return(MDOC_p1387_2);
 577                 else if (xstrcmp(argv, "isoC-90"))
 578                         return(MDOC_isoC_90);
 579                 else if (xstrcmp(argv, "isoC-amd1"))
 580                         return(MDOC_isoC_amd1);
 581                 else if (xstrcmp(argv, "isoC-tcor1"))
 582                         return(MDOC_isoC_tcor1);
 583                 else if (xstrcmp(argv, "isoC-tcor2"))
 584                         return(MDOC_isoC_tcor2);
 585                 else if (xstrcmp(argv, "isoC-99"))
 586                         return(MDOC_isoC_99);
 587                 else if (xstrcmp(argv, "ansiC"))
 588                         return(MDOC_ansiC);
 589                 else if (xstrcmp(argv, "ansiC-89"))
 590                         return(MDOC_ansiC_89);
 591                 else if (xstrcmp(argv, "ansiC-99"))
 592                         return(MDOC_ansiC_99);
 593                 else if (xstrcmp(argv, "ieee754"))
 594                         return(MDOC_ieee754);
 595                 else if (xstrcmp(argv, "iso8802-3"))
 596                         return(MDOC_iso8802_3);
 597                 else if (xstrcmp(argv, "xpg3"))
 598                         return(MDOC_xpg3);
 599                 else if (xstrcmp(argv, "xpg4"))
 600                         return(MDOC_xpg4);
 601                 else if (xstrcmp(argv, "xpg4.2"))
 602                         return(MDOC_xpg4_2);
 603                 else if (xstrcmp(argv, "xpg4.3"))
 604                         return(MDOC_xpg4_3);
 605                 else if (xstrcmp(argv, "xbd5"))
 606                         return(MDOC_xbd5);
 607                 else if (xstrcmp(argv, "xcu5"))
 608                         return(MDOC_xcu5);
 609                 else if (xstrcmp(argv, "xsh5"))
 610                         return(MDOC_xsh5);
 611                 else if (xstrcmp(argv, "xns5"))
 612                         return(MDOC_xns5);
 613                 else if (xstrcmp(argv, "xns5.2d2.0"))
 614                         return(MDOC_xns5_2d2_0);
 615                 else if (xstrcmp(argv, "xcurses4.2"))
 616                         return(MDOC_xcurses4_2);
 617                 else if (xstrcmp(argv, "susv2"))
 618                         return(MDOC_susv2);
 619                 else if (xstrcmp(argv, "susv3"))
 620                         return(MDOC_susv3);
 621                 else if (xstrcmp(argv, "svid4"))
 622                         return(MDOC_svid4);
 623                 break;
 624
 625         default:
 626                 break;
 627         }
 628
 629         return(MDOC_ARG_MAX);
 630 }
 631
 632
 633 static int
 634 argv_multi(struct mdoc *mdoc, int line,
 635                 struct mdoc_arg *v, int *pos, char *buf)
 636 {
 637         int              c, ppos;
 638         char            *p;
 639
 640         v->sz = 0;
 641         v->value = xcalloc(MDOC_LINEARG_MAX, sizeof(char *));
 642
 643         ppos = *pos;
 644
 645         for (v->sz = 0; v->sz < MDOC_LINEARG_MAX; v->sz++) {
 646                 if ('-' == buf[*pos])
 647                         break;
 648                 c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 649                 if (ARGS_ERROR == c) {
 650                         free(v->value);
 651                         return(0);
 652                 } else if (ARGS_EOLN == c)
 653                         break;
 654                 v->value[(int)v->sz] = p;
 655         }
 656
 657         if (0 < v->sz && v->sz < MDOC_LINEARG_MAX)
 658                 return(1);
 659
 660         free(v->value);
 661         if (0 == v->sz)
 662                 return(perr(mdoc, line, ppos, EARGVAL));
 663
 664         return(perr(mdoc, line, ppos, EARGMANY));
 665 }
 666
 667
 668 static int
 669 argv_single(struct mdoc *mdoc, int line,
 670                 struct mdoc_arg *v, int *pos, char *buf)
 671 {
 672         int              c, ppos;
 673         char            *p;
 674
 675         ppos = *pos;
 676
 677         c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 678         if (ARGS_ERROR == c)
 679                 return(0);
 680         if (ARGS_EOLN == c)
 681                 return(perr(mdoc, line, ppos,  EARGVAL));
 682
 683         v->sz = 1;
 684         v->value = xcalloc(1, sizeof(char *));
 685         v->value[0] = p;
 686         return(1);
 687 }
 688
 689
 690 static int
 691 argv(struct mdoc *mdoc, int line,
 692                 struct mdoc_arg *v, int *pos, char *buf)
 693 {
 694
 695         v->sz = 0;
 696         v->value = NULL;
 697
 698         switch (v->arg) {
 699         case(MDOC_Std):
 700                 /* FALLTHROUGH */
 701         case(MDOC_Width):
 702                 /* FALLTHROUGH */
 703         case(MDOC_Offset):
 704                 return(argv_single(mdoc, line, v, pos, buf));
 705         case(MDOC_Column):
 706                 return(argv_multi(mdoc, line, v, pos, buf));
 707         default:
 708                 break;
 709         }
 710
 711         return(1);
 712 }
 713
 714
 715 int
 716 mdoc_argv(struct mdoc *mdoc, int line, int tok,
 717                 struct mdoc_arg *v, int *pos, char *buf)
 718 {
 719         int              i;
 720         char            *p;
 721
 722         (void)memset(v, 0, sizeof(struct mdoc_arg));
 723
 724         if (0 == buf[*pos])
 725                 return(ARGV_EOLN);
 726
 727         assert( ! isspace((int)buf[*pos]));
 728
 729         if ('-' != buf[*pos])
 730                 return(ARGV_WORD);
 731
 732         i = *pos;
 733         p = &buf[++(*pos)];
 734
 735         v->line = line;
 736         v->pos = *pos;
 737
 738         assert(*pos > 0);
 739
 740         /* LINTED */
 741         while (buf[*pos]) {
 742                 if (isspace((int)buf[*pos]))
 743                         if ('\\' != buf[*pos - 1])
 744                                 break;
 745                 (*pos)++;
 746         }
 747
 748         if (buf[*pos])
 749                 buf[(*pos)++] = 0;
 750
 751         if (MDOC_ARG_MAX == (v->arg = argv_a2arg(tok, p))) {
 752                 if ( ! pwarn(mdoc, line, i, WARGVPARM))
 753                         return(ARGV_ERROR);
 754                 return(ARGV_WORD);
 755         }
 756
 757         while (buf[*pos] && isspace((int)buf[*pos]))
 758                 (*pos)++;
 759
 760         /* FIXME: whitespace if no value. */
 761
 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