argv.c

   1 /* $Id: argv.c,v 1.40 2009/03/08 12:40:27 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  * There's no limit to the number or arguments that may be allocated.
  34  */
  35
  36 #define ARGS_QUOTED     (1 << 0)
  37 #define ARGS_DELIM      (1 << 1)
  38 #define ARGS_TABSEP     (1 << 2)
  39 #define ARGS_ARGVLIKE   (1 << 3)
  40
  41 #define ARGV_NONE       (1 << 0)
  42 #define ARGV_SINGLE     (1 << 1)
  43 #define ARGV_MULTI      (1 << 2)
  44 #define ARGV_OPT_SINGLE (1 << 3)
  45
  46 enum    mwarn {
  47         WQUOTPARM,
  48         WARGVPARM,
  49         WCOLEMPTY,
  50         WTAILWS
  51 };
  52
  53 enum    merr {
  54         EQUOTTERM,
  55         EARGVAL
  56 };
  57
  58 static  int              argv_a2arg(int, const char *);
  59 static  int              args(struct mdoc *, int, int *,
  60                                 char *, int, char **);
  61 static  int              argv(struct mdoc *, int, int,
  62                                 struct mdoc_argv *, int *, char *);
  63 static  int              argv_single(struct mdoc *, int,
  64                                 struct mdoc_argv *, int *, char *);
  65 static  int              argv_opt_single(struct mdoc *, int,
  66                                 struct mdoc_argv *, int *, char *);
  67 static  int              argv_multi(struct mdoc *, int,
  68                                 struct mdoc_argv *, int *, char *);
  69 static  int              pwarn(struct mdoc *, int, int, enum mwarn);
  70 static  int              perr(struct mdoc *, int, int, enum merr);
  71
  72 /* Per-argument flags. */
  73
  74 static  int mdoc_argvflags[MDOC_ARG_MAX] = {
  75         ARGV_NONE,      /* MDOC_Split */
  76         ARGV_NONE,      /* MDOC_Nosplit */
  77         ARGV_NONE,      /* MDOC_Ragged */
  78         ARGV_NONE,      /* MDOC_Unfilled */
  79         ARGV_NONE,      /* MDOC_Literal */
  80         ARGV_NONE,      /* MDOC_File */
  81         ARGV_SINGLE,    /* MDOC_Offset */
  82         ARGV_NONE,      /* MDOC_Bullet */
  83         ARGV_NONE,      /* MDOC_Dash */
  84         ARGV_NONE,      /* MDOC_Hyphen */
  85         ARGV_NONE,      /* MDOC_Item */
  86         ARGV_NONE,      /* MDOC_Enum */
  87         ARGV_NONE,      /* MDOC_Tag */
  88         ARGV_NONE,      /* MDOC_Diag */
  89         ARGV_NONE,      /* MDOC_Hang */
  90         ARGV_NONE,      /* MDOC_Ohang */
  91         ARGV_NONE,      /* MDOC_Inset */
  92         ARGV_MULTI,     /* MDOC_Column */
  93         ARGV_SINGLE,    /* MDOC_Width */
  94         ARGV_NONE,      /* MDOC_Compact */
  95         ARGV_SINGLE,    /* MDOC_Std */
  96         ARGV_NONE,      /* MDOC_Filled */
  97         ARGV_NONE,      /* MDOC_Words */
  98         ARGV_NONE,      /* MDOC_Emphasis */
  99         ARGV_NONE       /* MDOC_Symbolic */
 100 };
 101
 102 static  int mdoc_argflags[MDOC_MAX] = {
 103         0, /* \" */
 104         0, /* Dd */
 105         0, /* Dt */
 106         0, /* Os */
 107         0, /* Sh */
 108         0, /* Ss */
 109         ARGS_DELIM, /* Pp */
 110         ARGS_DELIM, /* D1 */
 111         ARGS_DELIM, /* Dl */
 112         0, /* Bd */
 113         0, /* Ed */
 114         0, /* Bl */
 115         0, /* El */
 116         0, /* It */
 117         ARGS_DELIM, /* Ad */
 118         ARGS_DELIM, /* An */
 119         ARGS_DELIM, /* Ar */
 120         ARGS_QUOTED, /* Cd */
 121         ARGS_DELIM, /* Cm */
 122         ARGS_DELIM, /* Dv */
 123         ARGS_DELIM, /* Er */
 124         ARGS_DELIM, /* Ev */
 125         0, /* Ex */
 126         ARGS_DELIM | ARGS_QUOTED, /* Fa */
 127         0, /* Fd */
 128         ARGS_DELIM, /* Fl */
 129         ARGS_DELIM | ARGS_QUOTED, /* Fn */
 130         ARGS_DELIM | ARGS_QUOTED, /* Ft */
 131         ARGS_DELIM, /* Ic */
 132         0, /* In */
 133         ARGS_DELIM, /* Li */
 134         0, /* Nd */
 135         ARGS_DELIM, /* Nm */
 136         ARGS_DELIM, /* Op */
 137         0, /* Ot */
 138         ARGS_DELIM, /* Pa */
 139         0, /* Rv */
 140         ARGS_DELIM | ARGS_ARGVLIKE, /* St */
 141         ARGS_DELIM, /* Va */
 142         ARGS_DELIM, /* Vt */
 143         ARGS_DELIM, /* Xr */
 144         ARGS_QUOTED, /* %A */
 145         ARGS_QUOTED, /* %B */
 146         ARGS_QUOTED, /* %D */
 147         ARGS_QUOTED, /* %I */
 148         ARGS_QUOTED, /* %J */
 149         ARGS_QUOTED, /* %N */
 150         ARGS_QUOTED, /* %O */
 151         ARGS_QUOTED, /* %P */
 152         ARGS_QUOTED, /* %R */
 153         ARGS_QUOTED, /* %T */
 154         ARGS_QUOTED, /* %V */
 155         ARGS_DELIM, /* Ac */
 156         0, /* Ao */
 157         ARGS_DELIM, /* Aq */
 158         ARGS_DELIM, /* At */
 159         ARGS_DELIM, /* Bc */
 160         0, /* Bf */
 161         0, /* Bo */
 162         ARGS_DELIM, /* Bq */
 163         ARGS_DELIM, /* Bsx */
 164         ARGS_DELIM, /* Bx */
 165         0, /* Db */
 166         ARGS_DELIM, /* Dc */
 167         0, /* Do */
 168         ARGS_DELIM, /* Dq */
 169         ARGS_DELIM, /* Ec */
 170         0, /* Ef */
 171         ARGS_DELIM, /* Em */
 172         0, /* Eo */
 173         ARGS_DELIM, /* Fx */
 174         ARGS_DELIM, /* Ms */
 175         ARGS_DELIM, /* No */
 176         ARGS_DELIM, /* Ns */
 177         ARGS_DELIM, /* Nx */
 178         ARGS_DELIM, /* Ox */
 179         ARGS_DELIM, /* Pc */
 180         ARGS_DELIM, /* Pf */
 181         0, /* Po */
 182         ARGS_DELIM, /* Pq */
 183         ARGS_DELIM, /* Qc */
 184         ARGS_DELIM, /* Ql */
 185         0, /* Qo */
 186         ARGS_DELIM, /* Qq */
 187         0, /* Re */
 188         0, /* Rs */
 189         ARGS_DELIM, /* Sc */
 190         0, /* So */
 191         ARGS_DELIM, /* Sq */
 192         0, /* Sm */
 193         ARGS_DELIM, /* Sx */
 194         ARGS_DELIM, /* Sy */
 195         ARGS_DELIM, /* Tn */
 196         ARGS_DELIM, /* Ux */
 197         ARGS_DELIM, /* Xc */
 198         0, /* Xo */
 199         0, /* Fo */
 200         0, /* Fc */
 201         0, /* Oo */
 202         ARGS_DELIM, /* Oc */
 203         0, /* Bk */
 204         0, /* Ek */
 205         0, /* Bt */
 206         0, /* Hf */
 207         0, /* Fr */
 208         0, /* Ud */
 209         0, /* Lb */
 210 };
 211
 212
 213 /*
 214  * Parse an argument from line text.  This comes in the form of -key
 215  * [value0...], which may either have a single mandatory value, at least
 216  * one mandatory value, an optional single value, or no value.
 217  */
 218 int
 219 mdoc_argv(struct mdoc *mdoc, int line, int tok,
 220                 struct mdoc_arg **v, int *pos, char *buf)
 221 {
 222         int               i;
 223         char             *p;
 224         struct mdoc_argv tmp;
 225         struct mdoc_arg  *arg;
 226
 227         if (0 == buf[*pos])
 228                 return(ARGV_EOLN);
 229
 230         assert( ! isspace((u_char)buf[*pos]));
 231
 232         if ('-' != buf[*pos])
 233                 return(ARGV_WORD);
 234
 235         i = *pos;
 236         p = &buf[++(*pos)];
 237
 238         assert(*pos > 0);
 239
 240         /* LINTED */
 241         while (buf[*pos]) {
 242                 if (isspace((u_char)buf[*pos]))
 243                         if ('\\' != buf[*pos - 1])
 244                                 break;
 245                 (*pos)++;
 246         }
 247
 248         if (buf[*pos])
 249                 buf[(*pos)++] = 0;
 250
 251         (void)memset(&tmp, 0, sizeof(struct mdoc_argv));
 252         tmp.line = line;
 253         tmp.pos = *pos;
 254
 255         /*
 256          * We now parse out the per-macro arguments.  XXX - this can be
 257          * made much cleaner using per-argument tables.  See argv_a2arg
 258          * for details.
 259          */
 260
 261         if (MDOC_ARG_MAX == (tmp.arg = argv_a2arg(tok, p))) {
 262                 if ( ! pwarn(mdoc, line, i, WARGVPARM))
 263                         return(ARGV_ERROR);
 264                 return(ARGV_WORD);
 265         }
 266
 267         while (buf[*pos] && isspace((u_char)buf[*pos]))
 268                 (*pos)++;
 269
 270         /* FIXME: whitespace if no value. */
 271
 272         if ( ! argv(mdoc, tok, line, &tmp, pos, buf))
 273                 return(ARGV_ERROR);
 274
 275         if (NULL == (arg = *v)) {
 276                 *v = xcalloc(1, sizeof(struct mdoc_arg));
 277                 arg = *v;
 278         }
 279
 280         arg->argc++;
 281         arg->argv = xrealloc(arg->argv, arg->argc *
 282                         sizeof(struct mdoc_argv));
 283
 284         (void)memcpy(&arg->argv[(int)arg->argc - 1],
 285                         &tmp, sizeof(struct mdoc_argv));
 286
 287         return(ARGV_ARG);
 288 }
 289
 290
 291 void
 292 mdoc_argv_free(struct mdoc_arg *p)
 293 {
 294         int              i, j;
 295
 296         if (p->refcnt) {
 297                 --(p->refcnt);
 298                 if (p->refcnt)
 299                         return;
 300         }
 301
 302         assert(p->argc);
 303
 304         /* LINTED */
 305         for (i = 0; i < (int)p->argc; i++) {
 306                 if (0 == p->argv[i].sz)
 307                         continue;
 308                 /* LINTED */
 309                 for (j = 0; j < (int)p->argv[i].sz; j++)
 310                         free(p->argv[i].value[j]);
 311
 312                 free(p->argv[i].value);
 313         }
 314
 315         free(p->argv);
 316         free(p);
 317 }
 318
 319
 320
 321 static int
 322 perr(struct mdoc *mdoc, int line, int pos, enum merr code)
 323 {
 324         char            *p;
 325
 326         p = NULL;
 327
 328         switch (code) {
 329         case (EQUOTTERM):
 330                 p = "unterminated quoted parameter";
 331                 break;
 332         case (EARGVAL):
 333                 p = "argument requires a value";
 334                 break;
 335         }
 336
 337         assert(p);
 338         return(mdoc_perr(mdoc, line, pos, p));
 339 }
 340
 341
 342 static int
 343 pwarn(struct mdoc *mdoc, int line, int pos, enum mwarn code)
 344 {
 345         char            *p;
 346         int              c;
 347
 348         p = NULL;
 349         c = WARN_SYNTAX;
 350
 351         switch (code) {
 352         case (WQUOTPARM):
 353                 p = "unexpected quoted parameter";
 354                 break;
 355         case (WARGVPARM):
 356                 p = "argument-like parameter";
 357                 break;
 358         case (WCOLEMPTY):
 359                 p = "last list column is empty";
 360                 c = WARN_COMPAT;
 361                 break;
 362         case (WTAILWS):
 363                 p = "trailing whitespace";
 364                 c = WARN_COMPAT;
 365                 break;
 366         }
 367
 368         assert(p);
 369         return(mdoc_pwarn(mdoc, line, pos, c, p));
 370 }
 371
 372
 373 int
 374 mdoc_args(struct mdoc *mdoc, int line,
 375                 int *pos, char *buf, int tok, char **v)
 376 {
 377         int               fl, c, i;
 378         struct mdoc_node *n;
 379
 380         fl = (0 == tok) ? 0 : mdoc_argflags[tok];
 381
 382         /*
 383          * Override per-macro argument flags with context-specific ones.
 384          * As of now, this is only valid for `It' depending on its list
 385          * context.
 386          */
 387
 388         switch (tok) {
 389         case (MDOC_It):
 390                 for (n = mdoc->last; n; n = n->parent)
 391                         if (MDOC_BLOCK == n->type && MDOC_Bl == n->tok)
 392                                 break;
 393
 394                 assert(n);
 395                 c = (int)(n->args ? n->args->argc : 0);
 396                 assert(c > 0);
 397
 398                 /*
 399                  * Using `Bl -column' adds ARGS_TABSEP to the arguments
 400                  * and invalidates ARGS_DELIM.  Using `Bl -diag' allows
 401                  * for quoted arguments.
 402                  */
 403
 404                 /* LINTED */
 405                 for (i = 0; i < c; i++) {
 406                         switch (n->args->argv[i].arg) {
 407                         case (MDOC_Column):
 408                                 fl |= ARGS_TABSEP;
 409                                 fl &= ~ARGS_DELIM;
 410                                 i = c;
 411                                 break;
 412                         case (MDOC_Diag):
 413                                 fl |= ARGS_QUOTED;
 414                                 i = c;
 415                                 break;
 416                         default:
 417                                 break;
 418                         }
 419                 }
 420                 break;
 421         default:
 422                 break;
 423         }
 424
 425         /* Continue parsing the arguments themselves...  */
 426
 427         return(args(mdoc, line, pos, buf, fl, v));
 428 }
 429
 430
 431 static int
 432 args(struct mdoc *mdoc, int line,
 433                 int *pos, char *buf, int fl, char **v)
 434 {
 435         int               i;
 436         char             *p, *pp;
 437
 438         assert(*pos > 0);
 439
 440         if (0 == buf[*pos])
 441                 return(ARGS_EOLN);
 442
 443         if ('\"' == buf[*pos] && ! (fl & ARGS_QUOTED))
 444                 if ( ! pwarn(mdoc, line, *pos, WQUOTPARM))
 445                         return(ARGS_ERROR);
 446
 447         if ( ! (fl & ARGS_ARGVLIKE) && '-' == buf[*pos])
 448                 if ( ! pwarn(mdoc, line, *pos, WARGVPARM))
 449                         return(ARGS_ERROR);
 450
 451         /*
 452          * If the first character is a delimiter and we're to look for
 453          * delimited strings, then pass down the buffer seeing if it
 454          * follows the pattern of [[::delim::][ ]+]+.
 455          */
 456
 457         if ((fl & ARGS_DELIM) && mdoc_iscdelim(buf[*pos])) {
 458                 for (i = *pos; buf[i]; ) {
 459                         if ( ! mdoc_iscdelim(buf[i]))
 460                                 break;
 461                         i++;
 462                         /* There must be at least one space... */
 463                         if (0 == buf[i] || ! isspace((u_char)buf[i]))
 464                                 break;
 465                         i++;
 466                         while (buf[i] && isspace((u_char)buf[i]))
 467                                 i++;
 468                 }
 469                 if (0 == buf[i]) {
 470                         *v = &buf[*pos];
 471                         return(ARGS_PUNCT);
 472                 }
 473         }
 474
 475         /* First parse non-quoted strings. */
 476
 477         if ('\"' != buf[*pos] || ! (ARGS_QUOTED & fl)) {
 478                 *v = &buf[*pos];
 479
 480                 /*
 481                  * Thar be dragons here!  If we're tab-separated, search
 482                  * ahead for either a tab or the `Ta' macro.  If a tab
 483                  * is detected, it mustn't be escaped; if a `Ta' is
 484                  * detected, it must be space-buffered before and after.
 485                  * If either of these hold true, then prune out the
 486                  * extra spaces and call it an argument.
 487                  */
 488
 489                 if (ARGS_TABSEP & fl) {
 490                         /* Scan ahead to unescaped tab. */
 491
 492                         for (p = *v; ; p++) {
 493                                 if (NULL == (p = strchr(p, '\t')))
 494                                         break;
 495                                 if (p == *v)
 496                                         break;
 497                                 if ('\\' != *(p - 1))
 498                                         break;
 499                         }
 500
 501                         /* Scan ahead to unescaped `Ta'. */
 502
 503                         for (pp = *v; ; pp++) {
 504                                 if (NULL == (pp = strstr(pp, "Ta")))
 505                                         break;
 506                                 if (pp > *v && ' ' != *(pp - 1))
 507                                         continue;
 508                                 if (' ' == *(pp + 2) || 0 == *(pp + 2))
 509                                         break;
 510                         }
 511
 512                         /* Choose delimiter tab/Ta. */
 513
 514                         if (p && pp)
 515                                 p = (p < pp ? p : pp);
 516                         else if ( ! p && pp)
 517                                 p = pp;
 518
 519                         /* Strip delimiter's preceding whitespace. */
 520
 521                         if (p && p > *v) {
 522                                 pp = p - 1;
 523                                 while (pp > *v && ' ' == *pp)
 524                                         pp--;
 525                                 if (pp == *v && ' ' == *pp)
 526                                         *pp = 0;
 527                                 else if (' ' == *pp)
 528                                         *(pp + 1) = 0;
 529                         }
 530
 531                         /* ...in- and proceding whitespace. */
 532
 533                         if (p && ('\t' != *p)) {
 534                                 *p++ = 0;
 535                                 *p++ = 0;
 536                         } else if (p)
 537                                 *p++ = 0;
 538
 539                         if (p) {
 540                                 while (' ' == *p)
 541                                         p++;
 542                                 if (0 != *p)
 543                                         *(p - 1) = 0;
 544                                 *pos += (int)(p - *v);
 545                         }
 546
 547                         if (p && 0 == *p)
 548                                 if ( ! pwarn(mdoc, line, *pos, WCOLEMPTY))
 549                                         return(0);
 550                         if (p && 0 == *p && p > *v && ' ' == *(p - 1))
 551                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 552                                         return(0);
 553
 554                         if (p)
 555                                 return(ARGS_WORD);
 556
 557                         /* Configure the eoln case, too. */
 558
 559                         p = strchr(*v, 0);
 560                         assert(p);
 561
 562                         if (p > *v && ' ' == *(p - 1))
 563                                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 564                                         return(0);
 565                         *pos += (int)(p - *v);
 566
 567                         return(ARGS_WORD);
 568                 }
 569
 570                 /* Do non-tabsep look-ahead here. */
 571
 572                 if ( ! (ARGS_TABSEP & fl))
 573                         while (buf[*pos]) {
 574                                 if (isspace((u_char)buf[*pos]))
 575                                         if ('\\' != buf[*pos - 1])
 576                                                 break;
 577                                 (*pos)++;
 578                         }
 579
 580                 if (0 == buf[*pos])
 581                         return(ARGS_WORD);
 582
 583                 buf[(*pos)++] = 0;
 584
 585                 if (0 == buf[*pos])
 586                         return(ARGS_WORD);
 587
 588                 if ( ! (ARGS_TABSEP & fl))
 589                         while (buf[*pos] && isspace((u_char)buf[*pos]))
 590                                 (*pos)++;
 591
 592                 if (buf[*pos])
 593                         return(ARGS_WORD);
 594
 595                 if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 596                         return(ARGS_ERROR);
 597
 598                 return(ARGS_WORD);
 599         }
 600
 601         /*
 602          * If we're a quoted string (and quoted strings are allowed),
 603          * then parse ahead to the next quote.  If none's found, it's an
 604          * error.  After, parse to the next word.
 605          */
 606
 607         *v = &buf[++(*pos)];
 608
 609         while (buf[*pos] && '\"' != buf[*pos])
 610                 (*pos)++;
 611
 612         if (0 == buf[*pos]) {
 613                 (void)perr(mdoc, line, *pos, EQUOTTERM);
 614                 return(ARGS_ERROR);
 615         }
 616
 617         buf[(*pos)++] = 0;
 618         if (0 == buf[*pos])
 619                 return(ARGS_QWORD);
 620
 621         while (buf[*pos] && isspace((u_char)buf[*pos]))
 622                 (*pos)++;
 623
 624         if (buf[*pos])
 625                 return(ARGS_QWORD);
 626
 627         if ( ! pwarn(mdoc, line, *pos, WTAILWS))
 628                 return(ARGS_ERROR);
 629
 630         return(ARGS_QWORD);
 631 }
 632
 633
 634 static int
 635 argv_a2arg(int tok, const char *argv)
 636 {
 637
 638         /*
 639          * Parse an argument identifier from its text.  XXX - this
 640          * should really be table-driven to clarify the code.
 641          *
 642          * If you add an argument to the list, make sure that you
 643          * register it here with its one or more macros!
 644          */
 645
 646         switch (tok) {
 647         case (MDOC_An):
 648                 if (xstrcmp(argv, "split"))
 649                         return(MDOC_Split);
 650                 else if (xstrcmp(argv, "nosplit"))
 651                         return(MDOC_Nosplit);
 652                 break;
 653
 654         case (MDOC_Bd):
 655                 if (xstrcmp(argv, "ragged"))
 656                         return(MDOC_Ragged);
 657                 else if (xstrcmp(argv, "unfilled"))
 658                         return(MDOC_Unfilled);
 659                 else if (xstrcmp(argv, "filled"))
 660                         return(MDOC_Filled);
 661                 else if (xstrcmp(argv, "literal"))
 662                         return(MDOC_Literal);
 663                 else if (xstrcmp(argv, "file"))
 664                         return(MDOC_File);
 665                 else if (xstrcmp(argv, "offset"))
 666                         return(MDOC_Offset);
 667                 break;
 668
 669         case (MDOC_Bf):
 670                 if (xstrcmp(argv, "emphasis"))
 671                         return(MDOC_Emphasis);
 672                 else if (xstrcmp(argv, "literal"))
 673                         return(MDOC_Literal);
 674                 else if (xstrcmp(argv, "symbolic"))
 675                         return(MDOC_Symbolic);
 676                 break;
 677
 678         case (MDOC_Bk):
 679                 if (xstrcmp(argv, "words"))
 680                         return(MDOC_Words);
 681                 break;
 682
 683         case (MDOC_Bl):
 684                 if (xstrcmp(argv, "bullet"))
 685                         return(MDOC_Bullet);
 686                 else if (xstrcmp(argv, "dash"))
 687                         return(MDOC_Dash);
 688                 else if (xstrcmp(argv, "hyphen"))
 689                         return(MDOC_Hyphen);
 690                 else if (xstrcmp(argv, "item"))
 691                         return(MDOC_Item);
 692                 else if (xstrcmp(argv, "enum"))
 693                         return(MDOC_Enum);
 694                 else if (xstrcmp(argv, "tag"))
 695                         return(MDOC_Tag);
 696                 else if (xstrcmp(argv, "diag"))
 697                         return(MDOC_Diag);
 698                 else if (xstrcmp(argv, "hang"))
 699                         return(MDOC_Hang);
 700                 else if (xstrcmp(argv, "ohang"))
 701                         return(MDOC_Ohang);
 702                 else if (xstrcmp(argv, "inset"))
 703                         return(MDOC_Inset);
 704                 else if (xstrcmp(argv, "column"))
 705                         return(MDOC_Column);
 706                 else if (xstrcmp(argv, "width"))
 707                         return(MDOC_Width);
 708                 else if (xstrcmp(argv, "offset"))
 709                         return(MDOC_Offset);
 710                 else if (xstrcmp(argv, "compact"))
 711                         return(MDOC_Compact);
 712                 break;
 713
 714         case (MDOC_Rv):
 715                 /* FALLTHROUGH */
 716         case (MDOC_Ex):
 717                 if (xstrcmp(argv, "std"))
 718                         return(MDOC_Std);
 719                 break;
 720         default:
 721                 break;
 722         }
 723
 724         return(MDOC_ARG_MAX);
 725 }
 726
 727
 728 static int
 729 argv_multi(struct mdoc *mdoc, int line,
 730                 struct mdoc_argv *v, int *pos, char *buf)
 731 {
 732         int              c, ppos;
 733         char            *p;
 734
 735         ppos = *pos;
 736
 737         for (v->sz = 0; ; v->sz++) {
 738                 if ('-' == buf[*pos])
 739                         break;
 740                 c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 741                 if (ARGS_ERROR == c)
 742                         return(0);
 743                 else if (ARGS_EOLN == c)
 744                         break;
 745
 746                 if (0 == v->sz % 5)
 747                         v->value = xrealloc(v->value,
 748                                 (v->sz + 5) * sizeof(char *));
 749
 750                 v->value[(int)v->sz] = xstrdup(p);
 751         }
 752
 753         if (v->sz)
 754                 return(1);
 755
 756         return(perr(mdoc, line, ppos, EARGVAL));
 757 }
 758
 759
 760 static int
 761 argv_opt_single(struct mdoc *mdoc, int line,
 762                 struct mdoc_argv *v, int *pos, char *buf)
 763 {
 764         int              c;
 765         char            *p;
 766
 767         if ('-' == buf[*pos])
 768                 return(1);
 769
 770         c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 771         if (ARGS_ERROR == c)
 772                 return(0);
 773         if (ARGS_EOLN == c)
 774                 return(1);
 775
 776         v->sz = 1;
 777         v->value = xcalloc(1, sizeof(char *));
 778         v->value[0] = xstrdup(p);
 779         return(1);
 780 }
 781
 782
 783 /*
 784  * Parse a single, mandatory value from the stream.
 785  */
 786 static int
 787 argv_single(struct mdoc *mdoc, int line,
 788                 struct mdoc_argv *v, int *pos, char *buf)
 789 {
 790         int              c, ppos;
 791         char            *p;
 792
 793         ppos = *pos;
 794
 795         c = args(mdoc, line, pos, buf, ARGS_QUOTED, &p);
 796         if (ARGS_ERROR == c)
 797                 return(0);
 798         if (ARGS_EOLN == c)
 799                 return(perr(mdoc, line, ppos, EARGVAL));
 800
 801         v->sz = 1;
 802         v->value = xcalloc(1, sizeof(char *));
 803         v->value[0] = xstrdup(p);
 804         return(1);
 805 }
 806
 807
 808 /*
 809  * Determine rules for parsing arguments.  Arguments can either accept
 810  * no parameters, an optional single parameter, one parameter, or
 811  * multiple parameters.
 812  */
 813 static int
 814 argv(struct mdoc *mdoc, int tok, int line,
 815                 struct mdoc_argv *v, int *pos, char *buf)
 816 {
 817         int              fl;
 818
 819         v->sz = 0;
 820         v->value = NULL;
 821         fl = mdoc_argvflags[v->arg];
 822
 823         /*
 824          * Override the default per-argument value.
 825          */
 826
 827         switch (tok) {
 828         case (MDOC_Ex):
 829                 fl = ARGV_OPT_SINGLE;
 830                 break;
 831         default:
 832                 break;
 833         }
 834
 835         switch (fl) {
 836         case (ARGV_SINGLE):
 837                 return(argv_single(mdoc, line, v, pos, buf));
 838         case (ARGV_MULTI):
 839                 return(argv_multi(mdoc, line, v, pos, buf));
 840         case (ARGV_OPT_SINGLE):
 841                 return(argv_opt_single(mdoc, line, v, pos, buf));
 842         default:
 843                 /* ARGV_NONE */
 844                 break;
 845         }
 846
 847         return(1);
 848 }