argv.c

   1 /* $Id: argv.c,v 1.26 2009/01/22 14:56:21 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  * Parse arguments and parameters of macros.  Arguments follow the
  30  * syntax of `-arg [val [valN...]]', while parameters are free-form text
  31  * following arguments (if any).  This file must correctly handle the
  32  * strange punctuation rules dictated by groff.
  33  */
  34
  35 #define ARGS_QUOTED     (1 << 0)
  36 #define ARGS_DELIM      (1 << 1)
  37 #define ARGS_TABSEP     (1 << 2)
  38
  39 static  int              lookup(int, const char *);
  40 static  int              args(struct mdoc *, int, int *,
  41                                 char *, int, char **);
  42 static  int              argv(struct mdoc *, int,
  43                                 struct mdoc_arg *, int *, char *);
  44 static  int              argv_single(struct mdoc *, int,
  45                                 struct mdoc_arg *, int *, char *);
  46 static  int              argv_multi(struct mdoc *, int,
  47                                 struct mdoc_arg *, int *, char *);
  48 static  int              postargv(struct mdoc *, int,
  49                                 const struct mdoc_arg *, int);
  50 static  int              pwarn(struct mdoc *, int, int, int);
  51 static  int              perr(struct mdoc *, int, int, int);
  52
  53 /* Warning messages. */
  54
  55 #define WQUOTPARM       (0)
  56 #define WARGVPARM       (1)
  57 #define WCOLEMPTY       (2)
  58 #define WTAILWS         (3)
  59
  60 /* Error messages. */
  61
  62 #define EQUOTTERM       (0)
  63 #define EOFFSET         (1)
  64 #define EARGVAL         (2)
  65 #define EARGMANY        (3)
  66
  67 static  int mdoc_argflags[MDOC_MAX] = {
  68         0, /* \" */
  69         0, /* Dd */
  70         0, /* Dt */
  71         0, /* Os */
  72         0, /* Sh */
  73         0, /* Ss */
  74         ARGS_DELIM, /* Pp */
  75         ARGS_DELIM, /* D1 */
  76         ARGS_DELIM, /* Dl */
  77         0, /* Bd */
  78         0, /* Ed */
  79         0, /* Bl */
  80         0, /* El */
  81         ARGS_DELIM, /* It */
  82         ARGS_DELIM, /* Ad */
  83         ARGS_DELIM, /* An */
  84         ARGS_DELIM, /* Ar */
  85         ARGS_QUOTED, /* Cd */
  86         ARGS_DELIM, /* Cm */
  87         ARGS_DELIM, /* Dv */
  88         ARGS_DELIM, /* Er */
  89         ARGS_DELIM, /* Ev */
  90         0, /* Ex */
  91         ARGS_DELIM | ARGS_QUOTED, /* Fa */
  92         0, /* Fd */
  93         ARGS_DELIM, /* Fl */
  94         ARGS_DELIM | ARGS_QUOTED, /* Fn */
  95         ARGS_DELIM | ARGS_QUOTED, /* Ft */
  96         ARGS_DELIM, /* Ic */
  97         0, /* In */
  98         ARGS_DELIM, /* Li */
  99         0, /* Nd */
 100         ARGS_DELIM, /* Nm */
 101         ARGS_DELIM, /* Op */
 102         0, /* Ot */
 103         ARGS_DELIM, /* Pa */
 104         0, /* Rv */
 105         ARGS_DELIM, /* St */
 106         ARGS_DELIM, /* Va */
 107         ARGS_DELIM, /* Vt */
 108         ARGS_DELIM, /* Xr */
 109         ARGS_QUOTED, /* %A */
 110         ARGS_QUOTED, /* %B */
 111         ARGS_QUOTED, /* %D */
 112         ARGS_QUOTED, /* %I */
 113         ARGS_QUOTED, /* %J */
 114         ARGS_QUOTED, /* %N */
 115         ARGS_QUOTED, /* %O */
 116         ARGS_QUOTED, /* %P */
 117         ARGS_QUOTED, /* %R */
 118         ARGS_QUOTED, /* %T */
 119         ARGS_QUOTED, /* %V */
 120         ARGS_DELIM, /* Ac */
 121         0, /* Ao */
 122         ARGS_DELIM, /* Aq */
 123         ARGS_DELIM, /* At */
 124         ARGS_DELIM, /* Bc */
 125         0, /* Bf */
 126         0, /* Bo */
 127         ARGS_DELIM, /* Bq */
 128         ARGS_DELIM, /* Bsx */
 129         ARGS_DELIM, /* Bx */
 130         0, /* Db */
 131         ARGS_DELIM, /* Dc */
 132         0, /* Do */
 133         ARGS_DELIM, /* Dq */
 134         ARGS_DELIM, /* Ec */
 135         0, /* Ef */
 136         ARGS_DELIM, /* Em */
 137         0, /* Eo */
 138         ARGS_DELIM, /* Fx */
 139         ARGS_DELIM, /* Ms */
 140         ARGS_DELIM, /* No */
 141         ARGS_DELIM, /* Ns */
 142         ARGS_DELIM, /* Nx */
 143         ARGS_DELIM, /* Ox */
 144         ARGS_DELIM, /* Pc */
 145         ARGS_DELIM, /* Pf */
 146         0, /* Po */
 147         ARGS_DELIM, /* Pq */
 148         ARGS_DELIM, /* Qc */
 149         ARGS_DELIM, /* Ql */
 150         0, /* Qo */
 151         ARGS_DELIM, /* Qq */
 152         0, /* Re */
 153         0, /* Rs */
 154         ARGS_DELIM, /* Sc */
 155         0, /* So */
 156         ARGS_DELIM, /* Sq */
 157         0, /* Sm */
 158         ARGS_DELIM, /* Sx */
 159         ARGS_DELIM, /* Sy */
 160         ARGS_DELIM, /* Tn */
 161         ARGS_DELIM, /* Ux */
 162         ARGS_DELIM, /* Xc */
 163         0, /* Xo */
 164         0, /* Fo */
 165         0, /* Fc */
 166         0, /* Oo */
 167         ARGS_DELIM, /* Oc */
 168         0, /* Bk */
 169         0, /* Ek */
 170         0, /* Bt */
 171         0, /* Hf */
 172         0, /* Fr */
 173         0, /* Ud */
 174 };
 175
 176
 177 static int
 178 perr(struct mdoc *mdoc, int line, int pos, int code)
 179 {
 180         int              c;
 181
 182         switch (code) {
 183         case (EQUOTTERM):
 184                 c = mdoc_perr(mdoc, line, pos,
 185                                 "unterminated quoted parameter");
 186                 break;
 187         case (EOFFSET):
 188                 c = mdoc_perr(mdoc, line, pos,
 189                                 "invalid value for offset argument");
 190                 break;
 191         case (EARGVAL):
 192                 c = mdoc_perr(mdoc, line, pos,
 193                                 "argument requires a value");
 194                 break;
 195         case (EARGMANY):
 196                 c = mdoc_perr(mdoc, line, pos,
 197                                 "too many values for argument");
 198                 break;
 199         default:
 200                 abort();
 201                 /* NOTREACHED */
 202         }
 203         return(c);
 204 }
 205
 206
 207 static int
 208 pwarn(struct mdoc *mdoc, int line, int pos, int code)
 209 {
 210         int              c;
 211
 212         switch (code) {
 213         case (WQUOTPARM):
 214                 c = mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
 215                                 "unexpected quoted parameter");
 216                 break;
 217         case (WARGVPARM):
 218                 c = mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
 219                                 "argument-like parameter");
 220                 break;
 221         case (WCOLEMPTY):
 222                 c = mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX,
 223                                 "last list column is empty");
 224                 break;
 225         case (WTAILWS):
 226                 c = mdoc_pwarn(mdoc, line, pos, WARN_COMPAT,
 227                                 "trailing whitespace");
 228                 break;
 229         default:
 230                 abort();
 231                 /* NOTREACHED */
 232         }
 233         return(c);
 234 }
 235
 236
 237 int
 238 mdoc_args(struct mdoc *mdoc, int line,
 239                 int *pos, char *buf, int tok, char **v)
 240 {
 241         int               fl, c, i;
 242         struct mdoc_node *n;
 243
 244         fl = (0 == tok) ? 0 : mdoc_argflags[tok];
 245
 246         /*
 247          * First see if we should use TABSEP (Bl -column).  This
 248          * invalidates the use of ARGS_DELIM.
 249          */
 250
 251         if (MDOC_It == tok) {
 252                 for (n = mdoc->last; n; n = n->parent)
 253                         if (MDOC_BLOCK == n->type)
 254                                 if (MDOC_Bl == n->tok)
 255                                         break;
 256                 assert(n);
 257                 c = (int)n->data.block.argc;
 258                 assert(c > 0);
 259
 260                 /* LINTED */
 261                 for (i = 0; i < c; i++) {
 262                         if (MDOC_Column != n->data.block.argv[i].arg)
 263                                 continue;
 264                         fl |= ARGS_TABSEP;
 265                         fl &= ~ARGS_DELIM;
 266                         break;
 267                 }
 268         }
 269
 270         return(args(mdoc, line, pos, buf, fl, v));
 271 }
 272
 273
 274 static int
 275 args(struct mdoc *mdoc, int line,
 276                 int *pos, char *buf, int fl, char **v)
 277 {
 278         int               i, c;
 279         char             *p, *pp;
 280
 281         assert(*pos > 0);
 282
 283         if (0 == buf[*pos])
 284                 return(ARGS_EOLN);
 285
 286         if ('\"' == buf[*pos] && ! (fl & ARGS_QUOTED))
 287                 if ( ! pwarn(mdoc, line, *pos, WQUOTPARM))
 288                         return(ARGS_ERROR);
 289
 290         if ('-' == buf[*pos])
 291                 if ( ! pwarn(mdoc, line, *pos, WARGVPARM))
 292                         return(ARGS_ERROR);
 293
 294         /*
 295          * If the first character is a delimiter and we're to look for
 296          * delimited strings, then pass down the buffer seeing if it
 297          * follows the pattern of [[::delim::][ ]+]+.
 298          */
 299
 300         if ((fl & ARGS_DELIM) && mdoc_iscdelim(buf[*pos])) {
 301                 for (i = *pos; (c = buf[i]); ) {
 302                         if ( ! mdoc_iscdelim(c))
 303                                 break;
 304                         i++;
 305                         if (0 == buf[i] || ! isspace(c))
 306                                 break;
 307                         i++;
 308                         while (buf[i] && isspace(c))
 309                                 i++;
 310                 }
 311                 if (0 == buf[i]) {
 312                         *v = &buf[*pos];
 313                         return(ARGS_PUNCT);
 314                 }
 315         }
 316
 317         /* First parse non-quoted strings. */
 318
 319         if ('\"' != buf[*pos] || ! (ARGS_QUOTED & fl)) {
 320                 *v = &buf[*pos];
 321
 322                 /*
 323                  * Thar be dragons here!  If we're tab-separated, search
 324                  * ahead for either a tab or the `Ta' macro.  If a tab
 325                  * is detected, it mustn't be escaped; if a `Ta' is
 326                  * detected, it must be space-buffered before and after.
 327                  * If either of these hold true, then prune out the
 328                  * extra spaces and call it an argument.
 329                  */
 330
 331                 if (ARGS_TABSEP & fl) {
 332                         /* Scan ahead to unescaped tab. */
 333
 334                         for (p = *v; ; p++) {
 335                                 if (NULL == (p = strchr(p, '\t')))
 336                                         break;
 337                                 if (p == *v)
 338                                         break;
 339                                 if ('\\' != *(p - 1))
 340                                         break;
 341                         }
 342
 343                         /* Scan ahead to unescaped `Ta'. */
 344
 345                         for (pp = *v; ; pp++) {
 346                                 if (NULL == (pp = strstr(pp, "Ta")))
 347                                         break;
 348                                 if (pp > *v && ' ' != *(pp - 1))
 349                                         continue;
 350                                 if (' ' == *(pp + 2) || 0 == *(pp + 2))
 351                                         break;
 352                         }
 353
 354                         /* Choose delimiter tab/Ta. */
 355
 356                         if (p && pp)
 357                                 p = (p < pp ? p : pp);
 358                         else if ( ! p && pp)
 359                                 p = pp;
 360
 361                         /* Strip delimiter's preceding whitespace. */
 362
 363                         if (p && p > *v) {
 364                                 pp = p - 1;
 365                                 while (pp > *v && ' ' == *pp)
 366                                         pp--;
 367                                 if (pp == *v && ' ' == *pp)
 368                                         *pp = 0;
 369                                 else if (' ' == *pp)
 370                                         *(pp + 1) = 0;
 371                         }
 372
 373                         /* ...in- and proceding whitespace. */
 374
 375                         if (p && ('\t' != *p)) {
 376                                 *p++ = 0;
 377                                 *p++ = 0;
 378                         } else if (p)
 379                                 *p++ = 0;
 380
 381                         if (p) {
 382                                 while (' ' == *p)
 383                                         p++;
 384                                 if (0 != *p)
 385                                         *(p - 1) = 0;
 386                                 *pos += p - *v;
 387                         }
 388
 389                         if (p && 0 == *p)
 390                                 if ( ! pwarn(mdoc, line, *pos, WCOLEMPTY))
 391                                         return(0);
 392                         if (p && 0 == *p && p > *v && ' ' == *(p - 1))
 393                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 394                                         return(0);
 395
 396                         if (p)
 397                                 return(ARGS_WORD);
 398
 399                         /* Configure the eoln case, too. */
 400
 401                         p = strchr(*v, 0);
 402                         assert(p);
 403
 404                         if (p > *v && ' ' == *(p - 1))
 405                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 406                                         return(0);
 407                         *pos += p - *v;
 408
 409                         return(ARGS_WORD);
 410                 }
 411
 412                 /* Do non-tabsep look-ahead here. */
 413
 414                 if ( ! (ARGS_TABSEP & fl))
 415                         while ((c = buf[*pos])) {
 416                                 if (isspace(c))
 417                                         if ('\\' != buf[*pos - 1])
 418                                                 break;
 419                                 (*pos)++;
 420                         }
 421
 422                 if (0 == buf[*pos])
 423                         return(ARGS_WORD);
 424
 425                 buf[(*pos)++] = 0;
 426
 427                 if (0 == buf[*pos])
 428                         return(ARGS_WORD);
 429
 430                 if ( ! (ARGS_TABSEP & fl))
 431                         while (buf[*pos] && isspace((int)buf[*pos]))
 432                                 (*pos)++;
 433
 434                 if (buf[*pos])
 435                         return(ARGS_WORD);
 436
 437                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 438                         return(ARGS_ERROR);
 439
 440                 return(ARGS_WORD);
 441         }
 442
 443         /*
 444          * If we're a quoted string (and quoted strings are allowed),
 445          * then parse ahead to the next quote.  If none's found, it's an
 446          * error.  After, parse to the next word.
 447          */
 448
 449         *v = &buf[++(*pos)];
 450
 451         while (buf[*pos] && '\"' != buf[*pos])
 452                 (*pos)++;
 453
 454         if (0 == buf[*pos]) {
 455                 (void)perr(mdoc, line, *pos, EQUOTTERM);
 456                 return(ARGS_ERROR);
 457         }
 458
 459         buf[(*pos)++] = 0;
 460         if (0 == buf[*pos])
 461                 return(ARGS_QWORD);
 462
 463         while (buf[*pos] && isspace((int)buf[*pos]))
 464                 (*pos)++;
 465
 466         if (buf[*pos])
 467                 return(ARGS_QWORD);
 468
 469         if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 470                 return(ARGS_ERROR);
 471
 472         return(ARGS_QWORD);
 473 }
 474
 475
 476 static int
 477 lookup(int tok, const char *argv)
 478 {
 479
 480         switch (tok) {
 481         case (MDOC_An):
 482                 if (xstrcmp(argv, "split"))
 483                         return(MDOC_Split);
 484                 else if (xstrcmp(argv, "nosplit"))
 485                         return(MDOC_Nosplit);
 486                 break;
 487
 488         case (MDOC_Bd):
 489                 if (xstrcmp(argv, "ragged"))
 490                         return(MDOC_Ragged);
 491                 else if (xstrcmp(argv, "unfilled"))
 492                         return(MDOC_Unfilled);
 493                 else if (xstrcmp(argv, "filled"))
 494                         return(MDOC_Filled);
 495                 else if (xstrcmp(argv, "literal"))
 496                         return(MDOC_Literal);
 497                 else if (xstrcmp(argv, "file"))
 498                         return(MDOC_File);
 499                 else if (xstrcmp(argv, "offset"))
 500                         return(MDOC_Offset);
 501                 break;
 502
 503         case (MDOC_Bf):
 504                 if (xstrcmp(argv, "emphasis"))
 505                         return(MDOC_Emphasis);
 506                 else if (xstrcmp(argv, "literal"))
 507                         return(MDOC_Literal);
 508                 else if (xstrcmp(argv, "symbolic"))
 509                         return(MDOC_Symbolic);
 510                 break;
 511
 512         case (MDOC_Bk):
 513                 if (xstrcmp(argv, "words"))
 514                         return(MDOC_Words);
 515                 break;
 516
 517         case (MDOC_Bl):
 518                 if (xstrcmp(argv, "bullet"))
 519                         return(MDOC_Bullet);
 520                 else if (xstrcmp(argv, "dash"))
 521                         return(MDOC_Dash);
 522                 else if (xstrcmp(argv, "hyphen"))
 523                         return(MDOC_Hyphen);
 524                 else if (xstrcmp(argv, "item"))
 525                         return(MDOC_Item);
 526                 else if (xstrcmp(argv, "enum"))
 527                         return(MDOC_Enum);
 528                 else if (xstrcmp(argv, "tag"))
 529                         return(MDOC_Tag);
 530                 else if (xstrcmp(argv, "diag"))
 531                         return(MDOC_Diag);
 532                 else if (xstrcmp(argv, "hang"))
 533                         return(MDOC_Hang);
 534                 else if (xstrcmp(argv, "ohang"))
 535                         return(MDOC_Ohang);
 536                 else if (xstrcmp(argv, "inset"))
 537                         return(MDOC_Inset);
 538                 else if (xstrcmp(argv, "column"))
 539                         return(MDOC_Column);
 540                 else if (xstrcmp(argv, "width"))
 541                         return(MDOC_Width);
 542                 else if (xstrcmp(argv, "offset"))
 543                         return(MDOC_Offset);
 544                 else if (xstrcmp(argv, "compact"))
 545                         return(MDOC_Compact);
 546                 break;
 547
 548         case (MDOC_Rv):
 549                 /* FALLTHROUGH */
 550         case (MDOC_Ex):
 551                 if (xstrcmp(argv, "std"))
 552                         return(MDOC_Std);
 553                 break;
 554
 555         case (MDOC_St):
 556                 if (xstrcmp(argv, "p1003.1-88"))
 557                         return(MDOC_p1003_1_88);
 558                 else if (xstrcmp(argv, "p1003.1-90"))
 559                         return(MDOC_p1003_1_90);
 560                 else if (xstrcmp(argv, "p1003.1-96"))
 561                         return(MDOC_p1003_1_96);
 562                 else if (xstrcmp(argv, "p1003.1-2001"))
 563                         return(MDOC_p1003_1_2001);
 564                 else if (xstrcmp(argv, "p1003.1-2004"))
 565                         return(MDOC_p1003_1_2004);
 566                 else if (xstrcmp(argv, "p1003.1"))
 567                         return(MDOC_p1003_1);
 568                 else if (xstrcmp(argv, "p1003.1b"))
 569                         return(MDOC_p1003_1b);
 570                 else if (xstrcmp(argv, "p1003.1b-93"))
 571                         return(MDOC_p1003_1b_93);
 572                 else if (xstrcmp(argv, "p1003.1c-95"))
 573                         return(MDOC_p1003_1c_95);
 574                 else if (xstrcmp(argv, "p1003.1g-2000"))
 575                         return(MDOC_p1003_1g_2000);
 576                 else if (xstrcmp(argv, "p1003.2-92"))
 577                         return(MDOC_p1003_2_92);
 578                 else if (xstrcmp(argv, "p1003.2-95"))
 579                         return(MDOC_p1387_2_95);
 580                 else if (xstrcmp(argv, "p1003.2"))
 581                         return(MDOC_p1003_2);
 582                 else if (xstrcmp(argv, "p1387.2-95"))
 583                         return(MDOC_p1387_2);
 584                 else if (xstrcmp(argv, "isoC-90"))
 585                         return(MDOC_isoC_90);
 586                 else if (xstrcmp(argv, "isoC-amd1"))
 587                         return(MDOC_isoC_amd1);
 588                 else if (xstrcmp(argv, "isoC-tcor1"))
 589                         return(MDOC_isoC_tcor1);
 590                 else if (xstrcmp(argv, "isoC-tcor2"))
 591                         return(MDOC_isoC_tcor2);
 592                 else if (xstrcmp(argv, "isoC-99"))
 593                         return(MDOC_isoC_99);
 594                 else if (xstrcmp(argv, "ansiC"))
 595                         return(MDOC_ansiC);
 596                 else if (xstrcmp(argv, "ansiC-89"))
 597                         return(MDOC_ansiC_89);
 598                 else if (xstrcmp(argv, "ansiC-99"))
 599                         return(MDOC_ansiC_99);
 600                 else if (xstrcmp(argv, "ieee754"))
 601                         return(MDOC_ieee754);
 602                 else if (xstrcmp(argv, "iso8802-3"))
 603                         return(MDOC_iso8802_3);
 604                 else if (xstrcmp(argv, "xpg3"))
 605                         return(MDOC_xpg3);
 606                 else if (xstrcmp(argv, "xpg4"))
 607                         return(MDOC_xpg4);
 608                 else if (xstrcmp(argv, "xpg4.2"))
 609                         return(MDOC_xpg4_2);
 610                 else if (xstrcmp(argv, "xpg4.3"))
 611                         return(MDOC_xpg4_3);
 612                 else if (xstrcmp(argv, "xbd5"))
 613                         return(MDOC_xbd5);
 614                 else if (xstrcmp(argv, "xcu5"))
 615                         return(MDOC_xcu5);
 616                 else if (xstrcmp(argv, "xsh5"))
 617                         return(MDOC_xsh5);
 618                 else if (xstrcmp(argv, "xns5"))
 619                         return(MDOC_xns5);
 620                 else if (xstrcmp(argv, "xns5.2d2.0"))
 621                         return(MDOC_xns5_2d2_0);
 622                 else if (xstrcmp(argv, "xcurses4.2"))
 623                         return(MDOC_xcurses4_2);
 624                 else if (xstrcmp(argv, "susv2"))
 625                         return(MDOC_susv2);
 626                 else if (xstrcmp(argv, "susv3"))
 627                         return(MDOC_susv3);
 628                 else if (xstrcmp(argv, "svid4"))
 629                         return(MDOC_svid4);
 630                 break;
 631
 632         default:
 633                 break;
 634         }
 635
 636         return(MDOC_ARG_MAX);
 637 }
 638
 639
 640 static int
 641 postargv(struct mdoc *mdoc, int line, const struct mdoc_arg *v, int pos)
 642 {
 643
 644         switch (v->arg) {
 645         case (MDOC_Offset):
 646                 assert(v->value);
 647                 assert(v->value[0]);
 648                 if (xstrcmp(v->value[0], "left"))
 649                         break;
 650                 if (xstrcmp(v->value[0], "right"))
 651                         break;
 652                 if (xstrcmp(v->value[0], "center"))
 653                         break;
 654                 if (xstrcmp(v->value[0], "indent"))
 655                         break;
 656                 if (xstrcmp(v->value[0], "indent-two"))
 657                         break;
 658                 return(perr(mdoc, line, pos, EOFFSET));
 659         default:
 660                 break;
 661         }
 662
 663         return(1);
 664 }
 665
 666
 667 static int
 668 argv_multi(struct mdoc *mdoc, int line,
 669                 struct mdoc_arg *v, int *pos, char *buf)
 670 {
 671         int              c, ppos;
 672         char            *p;
 673
 674         v->sz = 0;
 675         v->value = xcalloc(MDOC_LINEARG_MAX, sizeof(char *));
 676
 677         ppos = *pos;
 678
 679         for (v->sz = 0; v->sz < MDOC_LINEARG_MAX; v->sz++) {
 680                 if ('-' == buf[*pos])
 681                         break;
 682                 c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 683                 if (ARGS_ERROR == c) {
 684                         free(v->value);
 685                         return(0);
 686                 } else if (ARGS_EOLN == c)
 687                         break;
 688                 v->value[v->sz] = p;
 689         }
 690
 691         if (0 < v->sz && v->sz < MDOC_LINEARG_MAX)
 692                 return(1);
 693
 694         free(v->value);
 695         if (0 == v->sz)
 696                 return(perr(mdoc, line, ppos, EARGVAL));
 697
 698         return(perr(mdoc, line, ppos, EARGMANY));
 699 }
 700
 701
 702 static int
 703 argv_single(struct mdoc *mdoc, int line,
 704                 struct mdoc_arg *v, int *pos, char *buf)
 705 {
 706         int              c, ppos;
 707         char            *p;
 708
 709         ppos = *pos;
 710
 711         c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 712         if (ARGS_ERROR == c)
 713                 return(0);
 714         if (ARGS_EOLN == c)
 715                 return(perr(mdoc, line, ppos,  EARGVAL));
 716
 717         v->sz = 1;
 718         v->value = xcalloc(1, sizeof(char *));
 719         v->value[0] = p;
 720         return(1);
 721 }
 722
 723
 724 static int
 725 argv(struct mdoc *mdoc, int line,
 726                 struct mdoc_arg *v, int *pos, char *buf)
 727 {
 728
 729         v->sz = 0;
 730         v->value = NULL;
 731
 732         switch (v->arg) {
 733         case(MDOC_Std):
 734                 /* FALLTHROUGH */
 735         case(MDOC_Width):
 736                 /* FALLTHROUGH */
 737         case(MDOC_Offset):
 738                 return(argv_single(mdoc, line, v, pos, buf));
 739         case(MDOC_Column):
 740                 return(argv_multi(mdoc, line, v, pos, buf));
 741         default:
 742                 break;
 743         }
 744
 745         return(1);
 746 }
 747
 748
 749 int
 750 mdoc_argv(struct mdoc *mdoc, int line, int tok,
 751                 struct mdoc_arg *v, int *pos, char *buf)
 752 {
 753         int              i, ppos;
 754         char            *p;
 755
 756         (void)memset(v, 0, sizeof(struct mdoc_arg));
 757
 758         if (0 == buf[*pos])
 759                 return(ARGV_EOLN);
 760
 761         assert( ! isspace((int)buf[*pos]));
 762
 763         if ('-' != buf[*pos])
 764                 return(ARGV_WORD);
 765
 766         i = *pos;
 767         p = &buf[++(*pos)];
 768
 769         v->line = line;
 770         v->pos = *pos;
 771
 772         assert(*pos > 0);
 773
 774         /* LINTED */
 775         while (buf[*pos]) {
 776                 if (isspace((int)buf[*pos]))
 777                         if ('\\' != buf[*pos - 1])
 778                                 break;
 779                 (*pos)++;
 780         }
 781
 782         if (buf[*pos])
 783                 buf[(*pos)++] = 0;
 784
 785         if (MDOC_ARG_MAX == (v->arg = lookup(tok, p))) {
 786                 if ( ! pwarn(mdoc, line, i, WARGVPARM))
 787                         return(ARGV_ERROR);
 788                 return(ARGV_WORD);
 789         }
 790
 791         while (buf[*pos] && isspace((int)buf[*pos]))
 792                 (*pos)++;
 793
 794         /* FIXME: whitespace if no value. */
 795
 796         ppos = *pos;
 797         if ( ! argv(mdoc, line, v, pos, buf))
 798                 return(ARGV_ERROR);
 799         if ( ! postargv(mdoc, line, v, ppos))
 800                 return(ARGV_ERROR);
 801
 802         return(ARGV_ARG);
 803 }
 804
 805
 806 void
 807 mdoc_argv_free(int sz, struct mdoc_arg *arg)
 808 {
 809         int              i;
 810
 811         for (i = 0; i < sz; i++) {
 812                 if (0 == arg[i].sz) {
 813                         assert(NULL == arg[i].value);
 814                         continue;
 815                 }
 816                 assert(arg[i].value);
 817                 free(arg[i].value);
 818         }
 819 }
 820