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5051 import mdocml-1.12.3
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
Approved by: TBD
   1 /*      $Id: mdoc_macro.c,v 1.115 2012/01/05 00:43:51 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21 
  22 #include <assert.h>
  23 #include <ctype.h>
  24 #include <stdlib.h>


  34 enum    rew {   /* see rew_dohalt() */
  35         REWIND_NONE,
  36         REWIND_THIS,
  37         REWIND_MORE,
  38         REWIND_FORCE,
  39         REWIND_LATER,
  40         REWIND_ERROR
  41 };
  42 
  43 static  int             blk_full(MACRO_PROT_ARGS);
  44 static  int             blk_exp_close(MACRO_PROT_ARGS);
  45 static  int             blk_part_exp(MACRO_PROT_ARGS);
  46 static  int             blk_part_imp(MACRO_PROT_ARGS);
  47 static  int             ctx_synopsis(MACRO_PROT_ARGS);
  48 static  int             in_line_eoln(MACRO_PROT_ARGS);
  49 static  int             in_line_argn(MACRO_PROT_ARGS);
  50 static  int             in_line(MACRO_PROT_ARGS);
  51 static  int             obsolete(MACRO_PROT_ARGS);
  52 static  int             phrase_ta(MACRO_PROT_ARGS);
  53 
  54 static  int             dword(struct mdoc *, int, int, 
  55                                 const char *, enum mdelim);
  56 static  int             append_delims(struct mdoc *, 
  57                                 int, int *, char *);
  58 static  enum mdoct      lookup(enum mdoct, const char *);
  59 static  enum mdoct      lookup_raw(const char *);
  60 static  int             make_pending(struct mdoc_node *, enum mdoct,
  61                                 struct mdoc *, int, int);
  62 static  int             phrase(struct mdoc *, int, int, char *);
  63 static  enum mdoct      rew_alt(enum mdoct);
  64 static  enum rew        rew_dohalt(enum mdoct, enum mdoc_type, 
  65                                 const struct mdoc_node *);
  66 static  int             rew_elem(struct mdoc *, enum mdoct);
  67 static  int             rew_last(struct mdoc *, 
  68                                 const struct mdoc_node *);
  69 static  int             rew_sub(enum mdoc_type, struct mdoc *, 
  70                                 enum mdoct, int, int);
  71 
  72 const   struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
  73         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ap */
  74         { in_line_eoln, MDOC_PROLOGUE }, /* Dd */
  75         { in_line_eoln, MDOC_PROLOGUE }, /* Dt */
  76         { in_line_eoln, MDOC_PROLOGUE }, /* Os */
  77         { blk_full, MDOC_PARSED }, /* Sh */
  78         { blk_full, MDOC_PARSED }, /* Ss */ 
  79         { in_line_eoln, 0 }, /* Pp */ 
  80         { blk_part_imp, MDOC_PARSED }, /* D1 */
  81         { blk_part_imp, MDOC_PARSED }, /* Dl */
  82         { blk_full, MDOC_EXPLICIT }, /* Bd */
  83         { blk_exp_close, MDOC_EXPLICIT }, /* Ed */
  84         { blk_full, MDOC_EXPLICIT }, /* Bl */
  85         { blk_exp_close, MDOC_EXPLICIT }, /* El */
  86         { blk_full, MDOC_PARSED }, /* It */
  87         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */ 
  88         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* An */
  89         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
  90         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cd */
  91         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
  92         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */ 
  93         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */ 
  94         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */ 
  95         { in_line_eoln, 0 }, /* Ex */
  96         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */ 
  97         { in_line_eoln, 0 }, /* Fd */ 
  98         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
  99         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */ 
 100         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */ 
 101         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */ 
 102         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
 103         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
 104         { blk_full, 0 }, /* Nd */ 
 105         { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */ 
 106         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
 107         { obsolete, 0 }, /* Ot */
 108         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
 109         { in_line_eoln, 0 }, /* Rv */
 110         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */ 
 111         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
 112         { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */ 
 113         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
 114         { in_line_eoln, 0 }, /* %A */
 115         { in_line_eoln, 0 }, /* %B */
 116         { in_line_eoln, 0 }, /* %D */
 117         { in_line_eoln, 0 }, /* %I */
 118         { in_line_eoln, 0 }, /* %J */
 119         { in_line_eoln, 0 }, /* %N */
 120         { in_line_eoln, 0 }, /* %O */
 121         { in_line_eoln, 0 }, /* %P */
 122         { in_line_eoln, 0 }, /* %R */
 123         { in_line_eoln, 0 }, /* %T */
 124         { in_line_eoln, 0 }, /* %V */
 125         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
 126         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
 127         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */


 128         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
 129         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */

 130         { blk_full, MDOC_EXPLICIT }, /* Bf */ 
 131         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bo */
 132         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */

 133         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
 134         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
 135         { in_line_eoln, 0 }, /* Db */
 136         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
 137         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
 138         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
 139         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
 140         { blk_exp_close, MDOC_EXPLICIT }, /* Ef */
 141         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Em */ 


 142         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
 143         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
 144         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
 145         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* No */
 146         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Ns */


 147         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
 148         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
 149         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */

 150         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
 151         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
 152         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
 153         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
 154         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
 155         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
 156         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
 157         { blk_exp_close, MDOC_EXPLICIT }, /* Re */



 158         { blk_full, MDOC_EXPLICIT }, /* Rs */
 159         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
 160         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* So */
 161         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */


 162         { in_line_eoln, 0 }, /* Sm */
 163         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
 164         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
 165         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
 166         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ux */
 167         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
 168         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
 169         { blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */ 
 170         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Fc */ 
 171         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
 172         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */



 173         { blk_full, MDOC_EXPLICIT }, /* Bk */
 174         { blk_exp_close, MDOC_EXPLICIT }, /* Ek */
 175         { in_line_eoln, 0 }, /* Bt */
 176         { in_line_eoln, 0 }, /* Hf */
 177         { obsolete, 0 }, /* Fr */
 178         { in_line_eoln, 0 }, /* Ud */
 179         { in_line, 0 }, /* Lb */
 180         { in_line_eoln, 0 }, /* Lp */ 
 181         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */ 
 182         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */ 
 183         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Brq */
 184         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bro */
 185         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Brc */
 186         { in_line_eoln, 0 }, /* %C */


 187         { obsolete, 0 }, /* Es */
 188         { obsolete, 0 }, /* En */
 189         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
 190         { in_line_eoln, 0 }, /* %Q */
 191         { in_line_eoln, 0 }, /* br */
 192         { in_line_eoln, 0 }, /* sp */
 193         { in_line_eoln, 0 }, /* %U */
 194         { phrase_ta, MDOC_CALLABLE | MDOC_PARSED }, /* Ta */
 195 };
 196 
 197 const   struct mdoc_macro * const mdoc_macros = __mdoc_macros;
 198 
 199 
 200 /*
 201  * This is called at the end of parsing.  It must traverse up the tree,
 202  * closing out open [implicit] scopes.  Obviously, open explicit scopes
 203  * are errors.
 204  */
 205 int
 206 mdoc_macroend(struct mdoc *m)
 207 {
 208         struct mdoc_node *n;
 209 
 210         /* Scan for open explicit scopes. */
 211 
 212         n = MDOC_VALID & m->last->flags ?  m->last->parent : m->last;

 213 
 214         for ( ; n; n = n->parent)
 215                 if (MDOC_BLOCK == n->type &&
 216                     MDOC_EXPLICIT & mdoc_macros[n->tok].flags)
 217                         mdoc_nmsg(m, n, MANDOCERR_SCOPEEXIT);
 218 
 219         /* Rewind to the first. */
 220 
 221         return(rew_last(m, m->first));
 222 }
 223 
 224 
 225 /*
 226  * Look up a macro from within a subsequent context.
 227  */
 228 static enum mdoct
 229 lookup(enum mdoct from, const char *p)
 230 {
 231 
 232         if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
 233                 return(MDOC_MAX);
 234         return(lookup_raw(p));
 235 }
 236 
 237 
 238 /*
 239  * Lookup a macro following the initial line macro.
 240  */
 241 static enum mdoct


 246         if (MDOC_MAX == (res = mdoc_hash_find(p)))
 247                 return(MDOC_MAX);
 248         if (MDOC_CALLABLE & mdoc_macros[res].flags)
 249                 return(res);
 250         return(MDOC_MAX);
 251 }
 252 
 253 
 254 static int
 255 rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
 256 {
 257         struct mdoc_node *n, *np;
 258 
 259         assert(to);
 260         mdoc->next = MDOC_NEXT_SIBLING;
 261 
 262         /* LINTED */
 263         while (mdoc->last != to) {
 264                 /*
 265                  * Save the parent here, because we may delete the
 266                  * m->last node in the post-validation phase and reset
 267                  * it to m->last->parent, causing a step in the closing
 268                  * out to be lost.
 269                  */
 270                 np = mdoc->last->parent;
 271                 if ( ! mdoc_valid_post(mdoc))
 272                         return(0);
 273                 n = mdoc->last;
 274                 mdoc->last = np;
 275                 assert(mdoc->last);
 276                 mdoc->last->last = n;
 277         }
 278 
 279         return(mdoc_valid_post(mdoc));
 280 }
 281 
 282 
 283 /*
 284  * For a block closing macro, return the corresponding opening one.
 285  * Otherwise, return the macro itself.
 286  */
 287 static enum mdoct


 443         struct mdoc_node *n;
 444 
 445         n = mdoc->last;
 446         if (MDOC_ELEM != n->type)
 447                 n = n->parent;
 448         assert(MDOC_ELEM == n->type);
 449         assert(tok == n->tok);
 450 
 451         return(rew_last(mdoc, n));
 452 }
 453 
 454 
 455 /*
 456  * We are trying to close a block identified by tok,
 457  * but the child block *broken is still open.
 458  * Thus, postpone closing the tok block
 459  * until the rew_sub call closing *broken.
 460  */
 461 static int
 462 make_pending(struct mdoc_node *broken, enum mdoct tok,
 463                 struct mdoc *m, int line, int ppos)
 464 {
 465         struct mdoc_node *breaker;
 466 
 467         /*
 468          * Iterate backwards, searching for the block matching tok,
 469          * that is, the block breaking the *broken block.
 470          */
 471         for (breaker = broken->parent; breaker; breaker = breaker->parent) {
 472 
 473                 /*
 474                  * If the *broken block had already been broken before
 475                  * and we encounter its breaker, make the tok block
 476                  * pending on the inner breaker.
 477                  * Graphically, "[A breaker=[B broken=[C->B B] tok=A] C]"
 478                  * becomes "[A broken=[B [C->B B] tok=A] C]"
 479                  * and finally "[A [B->A [C->B B] A] C]".
 480                  */
 481                 if (breaker == broken->pending) {
 482                         broken = breaker;
 483                         continue;


 498                  * becomes "[A breaker=[B->A broken=[C A] tok=B] C]"
 499                  * and finally "[A [B->A [C->B A] B] C]".
 500                  */
 501                 if (broken->pending) {
 502                         struct mdoc_node *taker;
 503 
 504                         /*
 505                          * If the breaker had also been broken before,
 506                          * it cannot take on the outer breaker itself,
 507                          * but must hand it on to its own breakers.
 508                          * Graphically, this is the following situation:
 509                          * "[A [B breaker=[C->B B] broken=[D->A A] tok=C] D]"
 510                          * "[A taker=[B->A breaker=[C->B B] [D->C A] C] D]"
 511                          */
 512                         taker = breaker;
 513                         while (taker->pending)
 514                                 taker = taker->pending;
 515                         taker->pending = broken->pending;
 516                 }
 517                 broken->pending = breaker;
 518                 mandoc_vmsg(MANDOCERR_SCOPENEST, m->parse, line, ppos,
 519                                 "%s breaks %s", mdoc_macronames[tok],
 520                                 mdoc_macronames[broken->tok]);
 521                 return(1);
 522         }
 523 
 524         /*
 525          * Found no matching block for tok.
 526          * Are you trying to close a block that is not open?
 527          */
 528         return(0);
 529 }
 530 
 531 
 532 static int
 533 rew_sub(enum mdoc_type t, struct mdoc *m, 
 534                 enum mdoct tok, int line, int ppos)
 535 {
 536         struct mdoc_node *n;
 537 
 538         n = m->last;
 539         while (n) {
 540                 switch (rew_dohalt(tok, t, n)) {
 541                 case (REWIND_NONE):
 542                         return(1);
 543                 case (REWIND_THIS):



 544                         break;
 545                 case (REWIND_FORCE):
 546                         mandoc_vmsg(MANDOCERR_SCOPEBROKEN, m->parse, 
 547                                         line, ppos, "%s breaks %s", 
 548                                         mdoc_macronames[tok],
 549                                         mdoc_macronames[n->tok]);
 550                         /* FALLTHROUGH */
 551                 case (REWIND_MORE):


 552                         n = n->parent;
 553                         continue;
 554                 case (REWIND_LATER):
 555                         if (make_pending(n, tok, m, line, ppos) ||
 556                             MDOC_BLOCK != t)
 557                                 return(1);
 558                         /* FALLTHROUGH */
 559                 case (REWIND_ERROR):
 560                         mdoc_pmsg(m, line, ppos, MANDOCERR_NOSCOPE);
 561                         return(1);
 562                 }
 563                 break;
 564         }
 565 
 566         assert(n);
 567         if ( ! rew_last(m, n))
 568                 return(0);
 569 
 570         /*
 571          * The current block extends an enclosing block.
 572          * Now that the current block ends, close the enclosing block, too.
 573          */
 574         while (NULL != (n = n->pending)) {
 575                 if ( ! rew_last(m, n))
 576                         return(0);
 577                 if (MDOC_HEAD == n->type &&
 578                     ! mdoc_body_alloc(m, n->line, n->pos, n->tok))
 579                         return(0);
 580         }
 581 
 582         return(1);
 583 }
 584 
 585 /*
 586  * Allocate a word and check whether it's punctuation or not.
 587  * Punctuation consists of those tokens found in mdoc_isdelim().
 588  */
 589 static int
 590 dword(struct mdoc *m, int line, 
 591                 int col, const char *p, enum mdelim d)
 592 {
 593         
 594         if (DELIM_MAX == d)
 595                 d = mdoc_isdelim(p);
 596 
 597         if ( ! mdoc_word_alloc(m, line, col, p))








 598                 return(0);
 599 
 600         if (DELIM_OPEN == d)
 601                 m->last->flags |= MDOC_DELIMO;
 602 
 603         /*
 604          * Closing delimiters only suppress the preceding space
 605          * when they follow something, not when they start a new
 606          * block or element, and not when they follow `No'.
 607          *
 608          * XXX  Explicitly special-casing MDOC_No here feels
 609          *      like a layering violation.  Find a better way
 610          *      and solve this in the code related to `No'!
 611          */
 612 
 613         else if (DELIM_CLOSE == d && m->last->prev &&
 614                         m->last->prev->tok != MDOC_No)
 615                 m->last->flags |= MDOC_DELIMC;

 616 
 617         return(1);
 618 }
 619 
 620 static int
 621 append_delims(struct mdoc *m, int line, int *pos, char *buf)
 622 {
 623         int              la;
 624         enum margserr    ac;
 625         char            *p;
 626 
 627         if ('\0' == buf[*pos])
 628                 return(1);
 629 
 630         for (;;) {
 631                 la = *pos;
 632                 ac = mdoc_zargs(m, line, pos, buf, &p);
 633 
 634                 if (ARGS_ERROR == ac)
 635                         return(0);
 636                 else if (ARGS_EOLN == ac)
 637                         break;
 638 
 639                 dword(m, line, la, p, DELIM_MAX);
 640 
 641                 /*
 642                  * If we encounter end-of-sentence symbols, then trigger
 643                  * the double-space.
 644                  *
 645                  * XXX: it's easy to allow this to propagate outward to
 646                  * the last symbol, such that `. )' will cause the
 647                  * correct double-spacing.  However, (1) groff isn't
 648                  * smart enough to do this and (2) it would require
 649                  * knowing which symbols break this behaviour, for
 650                  * example, `.  ;' shouldn't propagate the double-space.
 651                  */
 652                 if (mandoc_eos(p, strlen(p), 0))
 653                         m->last->flags |= MDOC_EOS;
 654         }
 655 
 656         return(1);
 657 }
 658 
 659 
 660 /*
 661  * Close out block partial/full explicit.  
 662  */
 663 static int
 664 blk_exp_close(MACRO_PROT_ARGS)
 665 {
 666         struct mdoc_node *body;         /* Our own body. */
 667         struct mdoc_node *later;        /* A sub-block starting later. */
 668         struct mdoc_node *n;            /* For searching backwards. */
 669 
 670         int              j, lastarg, maxargs, flushed, nl;
 671         enum margserr    ac;
 672         enum mdoct       atok, ntok;
 673         char            *p;
 674 
 675         nl = MDOC_NEWLINE & m->flags;
 676 
 677         switch (tok) {
 678         case (MDOC_Ec):
 679                 maxargs = 1;
 680                 break;


 681         default:
 682                 maxargs = 0;
 683                 break;
 684         }
 685 
 686         /*
 687          * Search backwards for beginnings of blocks,
 688          * both of our own and of pending sub-blocks.
 689          */
 690         atok = rew_alt(tok);
 691         body = later = NULL;
 692         for (n = m->last; n; n = n->parent) {
 693                 if (MDOC_VALID & n->flags)
 694                         continue;
 695 
 696                 /* Remember the start of our own body. */
 697                 if (MDOC_BODY == n->type && atok == n->tok) {
 698                         if (ENDBODY_NOT == n->end)
 699                                 body = n;
 700                         continue;
 701                 }
 702 
 703                 if (MDOC_BLOCK != n->type || MDOC_Nm == n->tok)
 704                         continue;
 705                 if (atok == n->tok) {
 706                         assert(body);
 707 
 708                         /*
 709                          * Found the start of our own block.
 710                          * When there is no pending sub block,
 711                          * just proceed to closing out.
 712                          */
 713                         if (NULL == later)
 714                                 break;
 715 
 716                         /* 
 717                          * When there is a pending sub block,
 718                          * postpone closing out the current block
 719                          * until the rew_sub() closing out the sub-block.
 720                          */
 721                         make_pending(later, tok, m, line, ppos);
 722 
 723                         /*
 724                          * Mark the place where the formatting - but not
 725                          * the scope - of the current block ends.
 726                          */
 727                         if ( ! mdoc_endbody_alloc(m, line, ppos,
 728                             atok, body, ENDBODY_SPACE))
 729                                 return(0);
 730                         break;
 731                 }
 732 
 733                 /*
 734                  * When finding an open sub block, remember the last
 735                  * open explicit block, or, in case there are only
 736                  * implicit ones, the first open implicit block.
 737                  */
 738                 if (later &&
 739                     MDOC_EXPLICIT & mdoc_macros[later->tok].flags)
 740                         continue;
 741                 if (MDOC_CALLABLE & mdoc_macros[n->tok].flags)
 742                         later = n;
 743         }
 744 
 745         if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
 746                 /* FIXME: do this in validate */
 747                 if (buf[*pos]) 
 748                         mdoc_pmsg(m, line, ppos, MANDOCERR_ARGSLOST);
 749 
 750                 if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
 751                         return(0);
 752                 return(rew_sub(MDOC_BLOCK, m, tok, line, ppos));
 753         }
 754 
 755         if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
 756                 return(0);
 757 
 758         if (NULL == later && maxargs > 0) 
 759                 if ( ! mdoc_tail_alloc(m, line, ppos, rew_alt(tok)))
 760                         return(0);
 761 
 762         for (flushed = j = 0; ; j++) {
 763                 lastarg = *pos;
 764 
 765                 if (j == maxargs && ! flushed) {
 766                         if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
 767                                 return(0);
 768                         flushed = 1;
 769                 }
 770 
 771                 ac = mdoc_args(m, line, pos, buf, tok, &p);
 772 
 773                 if (ARGS_ERROR == ac)
 774                         return(0);
 775                 if (ARGS_PUNCT == ac)
 776                         break;
 777                 if (ARGS_EOLN == ac)
 778                         break;
 779 
 780                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
 781 
 782                 if (MDOC_MAX == ntok) {
 783                         if ( ! dword(m, line, lastarg, p, DELIM_MAX))

 784                                 return(0);
 785                         continue;
 786                 }
 787 
 788                 if ( ! flushed) {
 789                         if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
 790                                 return(0);
 791                         flushed = 1;
 792                 }
 793                 if ( ! mdoc_macro(m, ntok, line, lastarg, pos, buf))



 794                         return(0);
 795                 break;
 796         }
 797 
 798         if ( ! flushed && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
 799                 return(0);
 800 
 801         if ( ! nl)
 802                 return(1);
 803         return(append_delims(m, line, pos, buf));
 804 }
 805 
 806 
 807 static int
 808 in_line(MACRO_PROT_ARGS)
 809 {
 810         int              la, scope, cnt, nc, nl;
 811         enum margverr    av;
 812         enum mdoct       ntok;
 813         enum margserr    ac;
 814         enum mdelim      d;
 815         struct mdoc_arg *arg;
 816         char            *p;
 817 
 818         nl = MDOC_NEWLINE & m->flags;
 819 
 820         /*
 821          * Whether we allow ignored elements (those without content,
 822          * usually because of reserved words) to squeak by.
 823          */
 824 
 825         switch (tok) {
 826         case (MDOC_An):
 827                 /* FALLTHROUGH */
 828         case (MDOC_Ar):
 829                 /* FALLTHROUGH */
 830         case (MDOC_Fl):
 831                 /* FALLTHROUGH */
 832         case (MDOC_Mt):
 833                 /* FALLTHROUGH */
 834         case (MDOC_Nm):
 835                 /* FALLTHROUGH */
 836         case (MDOC_Pa):
 837                 nc = 1;
 838                 break;
 839         default:
 840                 nc = 0;
 841                 break;
 842         }
 843 
 844         for (arg = NULL;; ) {
 845                 la = *pos;
 846                 av = mdoc_argv(m, line, tok, &arg, pos, buf);
 847 
 848                 if (ARGV_WORD == av) {
 849                         *pos = la;
 850                         break;
 851                 } 
 852                 if (ARGV_EOLN == av)
 853                         break;
 854                 if (ARGV_ARG == av)
 855                         continue;
 856 
 857                 mdoc_argv_free(arg);
 858                 return(0);
 859         }
 860 
 861         for (cnt = scope = 0;; ) {
 862                 la = *pos;
 863                 ac = mdoc_args(m, line, pos, buf, tok, &p);
 864 
 865                 if (ARGS_ERROR == ac)
 866                         return(0);
 867                 if (ARGS_EOLN == ac)
 868                         break;
 869                 if (ARGS_PUNCT == ac)
 870                         break;
 871 
 872                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
 873 
 874                 /* 
 875                  * In this case, we've located a submacro and must
 876                  * execute it.  Close out scope, if open.  If no
 877                  * elements have been generated, either create one (nc)
 878                  * or raise a warning.
 879                  */
 880 
 881                 if (MDOC_MAX != ntok) {
 882                         if (scope && ! rew_elem(m, tok))
 883                                 return(0);
 884                         if (nc && 0 == cnt) {
 885                                 if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))

 886                                         return(0);
 887                                 if ( ! rew_last(m, m->last))
 888                                         return(0);
 889                         } else if ( ! nc && 0 == cnt) {
 890                                 mdoc_argv_free(arg);
 891                                 mdoc_pmsg(m, line, ppos, MANDOCERR_MACROEMPTY);

 892                         }
 893 
 894                         if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
 895                                 return(0);
 896                         if ( ! nl)
 897                                 return(1);
 898                         return(append_delims(m, line, pos, buf));
 899                 } 
 900 
 901                 /* 
 902                  * Non-quote-enclosed punctuation.  Set up our scope, if
 903                  * a word; rewind the scope, if a delimiter; then append
 904                  * the word. 
 905                  */
 906 
 907                 d = ARGS_QWORD == ac ? DELIM_NONE : mdoc_isdelim(p);
 908 
 909                 if (DELIM_NONE != d) {
 910                         /*
 911                          * If we encounter closing punctuation, no word
 912                          * has been omitted, no scope is open, and we're
 913                          * allowed to have an empty element, then start
 914                          * a new scope.  `Ar', `Fl', and `Li', only do
 915                          * this once per invocation.  There may be more
 916                          * of these (all of them?).
 917                          */
 918                         if (0 == cnt && (nc || MDOC_Li == tok) && 
 919                                         DELIM_CLOSE == d && ! scope) {
 920                                 if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))

 921                                         return(0);
 922                                 if (MDOC_Ar == tok || MDOC_Li == tok || 
 923                                                 MDOC_Fl == tok)
 924                                         cnt++;
 925                                 scope = 1;
 926                         }
 927                         /*
 928                          * Close out our scope, if one is open, before
 929                          * any punctuation.
 930                          */
 931                         if (scope && ! rew_elem(m, tok))
 932                                 return(0);
 933                         scope = 0;
 934                 } else if ( ! scope) {
 935                         if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
 936                                 return(0);
 937                         scope = 1;
 938                 }
 939 
 940                 if (DELIM_NONE == d)
 941                         cnt++;
 942 
 943                 if ( ! dword(m, line, la, p, d))

 944                         return(0);
 945 
 946                 /*
 947                  * `Fl' macros have their scope re-opened with each new
 948                  * word so that the `-' can be added to each one without
 949                  * having to parse out spaces.
 950                  */
 951                 if (scope && MDOC_Fl == tok) {
 952                         if ( ! rew_elem(m, tok))
 953                                 return(0);
 954                         scope = 0;
 955                 }
 956         }
 957 
 958         if (scope && ! rew_elem(m, tok))
 959                 return(0);
 960 
 961         /*
 962          * If no elements have been collected and we're allowed to have
 963          * empties (nc), open a scope and close it out.  Otherwise,
 964          * raise a warning.
 965          */
 966 
 967         if (nc && 0 == cnt) {
 968                 if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
 969                         return(0);
 970                 if ( ! rew_last(m, m->last))
 971                         return(0);
 972         } else if ( ! nc && 0 == cnt) {
 973                 mdoc_argv_free(arg);
 974                 mdoc_pmsg(m, line, ppos, MANDOCERR_MACROEMPTY);
 975         }
 976 
 977         if ( ! nl)
 978                 return(1);
 979         return(append_delims(m, line, pos, buf));
 980 }
 981 
 982 
 983 static int
 984 blk_full(MACRO_PROT_ARGS)
 985 {
 986         int               la, nl, nparsed;
 987         struct mdoc_arg  *arg;
 988         struct mdoc_node *head; /* save of head macro */
 989         struct mdoc_node *body; /* save of body macro */
 990         struct mdoc_node *n;
 991         enum mdoc_type    mtt;
 992         enum mdoct        ntok;
 993         enum margserr     ac, lac;
 994         enum margverr     av;
 995         char             *p;
 996 
 997         nl = MDOC_NEWLINE & m->flags;
 998 
 999         /* Close out prior implicit scope. */
1000 
1001         if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
1002                 if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1003                         return(0);
1004                 if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1005                         return(0);
1006         }
1007 
1008         /*
1009          * This routine accommodates implicitly- and explicitly-scoped
1010          * macro openings.  Implicit ones first close out prior scope
1011          * (seen above).  Delay opening the head until necessary to
1012          * allow leading punctuation to print.  Special consideration
1013          * for `It -column', which has phrase-part syntax instead of
1014          * regular child nodes.
1015          */
1016 
1017         for (arg = NULL;; ) {
1018                 la = *pos;
1019                 av = mdoc_argv(m, line, tok, &arg, pos, buf);
1020 
1021                 if (ARGV_WORD == av) {
1022                         *pos = la;
1023                         break;
1024                 } 
1025 
1026                 if (ARGV_EOLN == av)
1027                         break;
1028                 if (ARGV_ARG == av)
1029                         continue;
1030 
1031                 mdoc_argv_free(arg);
1032                 return(0);
1033         }
1034 
1035         if ( ! mdoc_block_alloc(m, line, ppos, tok, arg))
1036                 return(0);
1037 
1038         head = body = NULL;
1039 
1040         /*
1041          * Exception: Heads of `It' macros in `-diag' lists are not
1042          * parsed, even though `It' macros in general are parsed.
1043          */
1044         nparsed = MDOC_It == tok &&
1045                 MDOC_Bl == m->last->parent->tok &&
1046                 LIST_diag == m->last->parent->norm->Bl.type;
1047 
1048         /*
1049          * The `Nd' macro has all arguments in its body: it's a hybrid
1050          * of block partial-explicit and full-implicit.  Stupid.
1051          */
1052 
1053         if (MDOC_Nd == tok) {
1054                 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1055                         return(0);
1056                 head = m->last;
1057                 if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1058                         return(0);
1059                 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1060                         return(0);
1061                 body = m->last;
1062         } 
1063 



1064         ac = ARGS_ERROR;
1065 
1066         for ( ; ; ) {
1067                 la = *pos;
1068                 /* Initialise last-phrase-type with ARGS_PEND. */
1069                 lac = ARGS_ERROR == ac ? ARGS_PEND : ac;
1070                 ac = mdoc_args(m, line, pos, buf, tok, &p);
1071 
1072                 if (ARGS_PUNCT == ac)
1073                         break;
1074 
1075                 if (ARGS_ERROR == ac)
1076                         return(0);
1077 
1078                 if (ARGS_EOLN == ac) {
1079                         if (ARGS_PPHRASE != lac && ARGS_PHRASE != lac)
1080                                 break;
1081                         /*
1082                          * This is necessary: if the last token on a
1083                          * line is a `Ta' or tab, then we'll get
1084                          * ARGS_EOLN, so we must be smart enough to
1085                          * reopen our scope if the last parse was a
1086                          * phrase or partial phrase.
1087                          */
1088                         if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1089                                 return(0);
1090                         if ( ! mdoc_body_alloc(m, line, ppos, tok))
1091                                 return(0);
1092                         body = m->last;
1093                         break;
1094                 }
1095 
1096                 /* 
1097                  * Emit leading punctuation (i.e., punctuation before
1098                  * the MDOC_HEAD) for non-phrase types.
1099                  */
1100 
1101                 if (NULL == head && 
1102                                 ARGS_PEND != ac &&
1103                                 ARGS_PHRASE != ac &&
1104                                 ARGS_PPHRASE != ac &&
1105                                 ARGS_QWORD != ac &&
1106                                 DELIM_OPEN == mdoc_isdelim(p)) {
1107                         if ( ! dword(m, line, la, p, DELIM_OPEN))
1108                                 return(0);
1109                         continue;
1110                 }
1111 
1112                 /* Open a head if one hasn't been opened. */
1113 
1114                 if (NULL == head) {
1115                         if ( ! mdoc_head_alloc(m, line, ppos, tok))
1116                                 return(0);
1117                         head = m->last;
1118                 }
1119 
1120                 if (ARGS_PHRASE == ac || 
1121                                 ARGS_PEND == ac ||
1122                                 ARGS_PPHRASE == ac) {
1123                         /*
1124                          * If we haven't opened a body yet, rewind the
1125                          * head; if we have, rewind that instead.
1126                          */
1127 
1128                         mtt = body ? MDOC_BODY : MDOC_HEAD;
1129                         if ( ! rew_sub(mtt, m, tok, line, ppos))
1130                                 return(0);
1131                         
1132                         /* Then allocate our body context. */
1133 
1134                         if ( ! mdoc_body_alloc(m, line, ppos, tok))
1135                                 return(0);
1136                         body = m->last;
1137 
1138                         /*
1139                          * Process phrases: set whether we're in a
1140                          * partial-phrase (this effects line handling)
1141                          * then call down into the phrase parser.
1142                          */
1143 
1144                         if (ARGS_PPHRASE == ac)
1145                                 m->flags |= MDOC_PPHRASE;
1146                         if (ARGS_PEND == ac && ARGS_PPHRASE == lac)
1147                                 m->flags |= MDOC_PPHRASE;
1148 
1149                         if ( ! phrase(m, line, la, buf))
1150                                 return(0);
1151 
1152                         m->flags &= ~MDOC_PPHRASE;
1153                         continue;
1154                 }
1155 
1156                 ntok = nparsed || ARGS_QWORD == ac ? 
1157                         MDOC_MAX : lookup(tok, p);
1158 
1159                 if (MDOC_MAX == ntok) {
1160                         if ( ! dword(m, line, la, p, DELIM_MAX))

1161                                 return(0);
1162                         continue;
1163                 }
1164 
1165                 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1166                         return(0);
1167                 break;
1168         }
1169 
1170         if (NULL == head) {
1171                 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1172                         return(0);
1173                 head = m->last;
1174         }
1175         
1176         if (nl && ! append_delims(m, line, pos, buf))
1177                 return(0);
1178 
1179         /* If we've already opened our body, exit now. */
1180 
1181         if (NULL != body)
1182                 goto out;
1183 
1184         /*
1185          * If there is an open (i.e., unvalidated) sub-block requiring
1186          * explicit close-out, postpone switching the current block from
1187          * head to body until the rew_sub() call closing out that
1188          * sub-block.
1189          */
1190         for (n = m->last; n && n != head; n = n->parent) {
1191                 if (MDOC_BLOCK == n->type && 
1192                                 MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
1193                                 ! (MDOC_VALID & n->flags)) {
1194                         n->pending = head;
1195                         return(1);
1196                 }
1197         }
1198 
1199         /* Close out scopes to remain in a consistent state. */
1200 
1201         if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1202                 return(0);
1203         if ( ! mdoc_body_alloc(m, line, ppos, tok))
1204                 return(0);
1205 
1206 out:
1207         if ( ! (MDOC_FREECOL & m->flags))
1208                 return(1);
1209 
1210         if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1211                 return(0);
1212         if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1213                 return(0);
1214 
1215         m->flags &= ~MDOC_FREECOL;
1216         return(1);
1217 }
1218 
1219 
1220 static int
1221 blk_part_imp(MACRO_PROT_ARGS)
1222 {
1223         int               la, nl;
1224         enum mdoct        ntok;
1225         enum margserr     ac;
1226         char             *p;
1227         struct mdoc_node *blk; /* saved block context */
1228         struct mdoc_node *body; /* saved body context */
1229         struct mdoc_node *n;
1230 
1231         nl = MDOC_NEWLINE & m->flags;
1232 
1233         /*
1234          * A macro that spans to the end of the line.  This is generally
1235          * (but not necessarily) called as the first macro.  The block
1236          * has a head as the immediate child, which is always empty,
1237          * followed by zero or more opening punctuation nodes, then the
1238          * body (which may be empty, depending on the macro), then zero
1239          * or more closing punctuation nodes.
1240          */
1241 
1242         if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
1243                 return(0);
1244 
1245         blk = m->last;
1246 
1247         if ( ! mdoc_head_alloc(m, line, ppos, tok))
1248                 return(0);
1249         if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1250                 return(0);
1251 
1252         /*
1253          * Open the body scope "on-demand", that is, after we've
1254          * processed all our the leading delimiters (open parenthesis,
1255          * etc.).
1256          */
1257 
1258         for (body = NULL; ; ) {
1259                 la = *pos;
1260                 ac = mdoc_args(m, line, pos, buf, tok, &p);
1261 
1262                 if (ARGS_ERROR == ac)
1263                         return(0);
1264                 if (ARGS_EOLN == ac)
1265                         break;
1266                 if (ARGS_PUNCT == ac)
1267                         break;
1268 
1269                 if (NULL == body && ARGS_QWORD != ac &&
1270                                 DELIM_OPEN == mdoc_isdelim(p)) {
1271                         if ( ! dword(m, line, la, p, DELIM_OPEN))
1272                                 return(0);
1273                         continue;
1274                 } 
1275 
1276                 if (NULL == body) {
1277                        if ( ! mdoc_body_alloc(m, line, ppos, tok))
1278                                return(0);
1279                         body = m->last;
1280                 }
1281 
1282                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1283 
1284                 if (MDOC_MAX == ntok) {
1285                         if ( ! dword(m, line, la, p, DELIM_MAX))

1286                                 return(0);
1287                         continue;
1288                 }
1289 
1290                 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1291                         return(0);
1292                 break;
1293         }
1294 
1295         /* Clean-ups to leave in a consistent state. */
1296 
1297         if (NULL == body) {
1298                 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1299                         return(0);
1300                 body = m->last;
1301         }
1302 
1303         for (n = body->child; n && n->next; n = n->next)
1304                 /* Do nothing. */ ;
1305         
1306         /* 
1307          * End of sentence spacing: if the last node is a text node and
1308          * has a trailing period, then mark it as being end-of-sentence.
1309          */
1310 
1311         if (n && MDOC_TEXT == n->type && n->string)
1312                 if (mandoc_eos(n->string, strlen(n->string), 1))
1313                         n->flags |= MDOC_EOS;
1314 
1315         /* Up-propagate the end-of-space flag. */
1316 
1317         if (n && (MDOC_EOS & n->flags)) {
1318                 body->flags |= MDOC_EOS;
1319                 body->parent->flags |= MDOC_EOS;
1320         }
1321 
1322         /*
1323          * If there is an open sub-block requiring explicit close-out,
1324          * postpone closing out the current block
1325          * until the rew_sub() call closing out the sub-block.
1326          */
1327         for (n = m->last; n && n != body && n != blk->parent; n = n->parent) {

1328                 if (MDOC_BLOCK == n->type &&
1329                     MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
1330                     ! (MDOC_VALID & n->flags)) {
1331                         make_pending(n, tok, m, line, ppos);
1332                         if ( ! mdoc_endbody_alloc(m, line, ppos,
1333                             tok, body, ENDBODY_NOSPACE))
1334                                 return(0);
1335                         return(1);
1336                 }
1337         }
1338 
1339         /* 
1340          * If we can't rewind to our body, then our scope has already
1341          * been closed by another macro (like `Oc' closing `Op').  This
1342          * is ugly behaviour nodding its head to OpenBSD's overwhelming
1343          * crufty use of `Op' breakage.
1344          */
1345         if (n != body)
1346                 mandoc_vmsg(MANDOCERR_SCOPENEST, m->parse, line, ppos, 
1347                                 "%s broken", mdoc_macronames[tok]);
1348 
1349         if (n && ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1350                 return(0);
1351 
1352         /* Standard appending of delimiters. */
1353 
1354         if (nl && ! append_delims(m, line, pos, buf))
1355                 return(0);
1356 
1357         /* Rewind scope, if applicable. */
1358 
1359         if (n && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1360                 return(0);
1361 







1362         return(1);
1363 }
1364 
1365 
1366 static int
1367 blk_part_exp(MACRO_PROT_ARGS)
1368 {
1369         int               la, nl;
1370         enum margserr     ac;
1371         struct mdoc_node *head; /* keep track of head */
1372         struct mdoc_node *body; /* keep track of body */
1373         char             *p;
1374         enum mdoct        ntok;
1375 
1376         nl = MDOC_NEWLINE & m->flags;
1377 
1378         /*
1379          * The opening of an explicit macro having zero or more leading
1380          * punctuation nodes; a head with optional single element (the
1381          * case of `Eo'); and a body that may be empty.
1382          */
1383 
1384         if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
1385                 return(0); 
1386 
1387         for (head = body = NULL; ; ) {
1388                 la = *pos;
1389                 ac = mdoc_args(m, line, pos, buf, tok, &p);
1390 
1391                 if (ARGS_ERROR == ac)
1392                         return(0);
1393                 if (ARGS_PUNCT == ac)
1394                         break;
1395                 if (ARGS_EOLN == ac)
1396                         break;
1397 
1398                 /* Flush out leading punctuation. */
1399 
1400                 if (NULL == head && ARGS_QWORD != ac &&
1401                                 DELIM_OPEN == mdoc_isdelim(p)) {
1402                         assert(NULL == body);
1403                         if ( ! dword(m, line, la, p, DELIM_OPEN))
1404                                 return(0);
1405                         continue;
1406                 } 
1407 
1408                 if (NULL == head) {
1409                         assert(NULL == body);
1410                         if ( ! mdoc_head_alloc(m, line, ppos, tok))
1411                                 return(0);
1412                         head = m->last;
1413                 }
1414 
1415                 /*
1416                  * `Eo' gobbles any data into the head, but most other
1417                  * macros just immediately close out and begin the body.
1418                  */
1419 
1420                 if (NULL == body) {
1421                         assert(head);
1422                         /* No check whether it's a macro! */
1423                         if (MDOC_Eo == tok)
1424                                 if ( ! dword(m, line, la, p, DELIM_MAX))
1425                                         return(0);
1426 
1427                         if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1428                                 return(0);
1429                         if ( ! mdoc_body_alloc(m, line, ppos, tok))
1430                                 return(0);
1431                         body = m->last;
1432 
1433                         if (MDOC_Eo == tok)
1434                                 continue;
1435                 }
1436 
1437                 assert(NULL != head && NULL != body);
1438 
1439                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1440 
1441                 if (MDOC_MAX == ntok) {
1442                         if ( ! dword(m, line, la, p, DELIM_MAX))

1443                                 return(0);
1444                         continue;
1445                 }
1446 
1447                 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1448                         return(0);
1449                 break;
1450         }
1451 
1452         /* Clean-up to leave in a consistent state. */
1453 
1454         if (NULL == head)
1455                 if ( ! mdoc_head_alloc(m, line, ppos, tok))
1456                         return(0);
1457 
1458         if (NULL == body) {
1459                 if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1460                         return(0);
1461                 if ( ! mdoc_body_alloc(m, line, ppos, tok))
1462                         return(0);
1463         }
1464 
1465         /* Standard appending of delimiters. */
1466 
1467         if ( ! nl)
1468                 return(1);
1469         return(append_delims(m, line, pos, buf));
1470 }
1471 
1472 
1473 /* ARGSUSED */
1474 static int
1475 in_line_argn(MACRO_PROT_ARGS)
1476 {
1477         int              la, flushed, j, maxargs, nl;
1478         enum margserr    ac;
1479         enum margverr    av;
1480         struct mdoc_arg *arg;
1481         char            *p;
1482         enum mdoct       ntok;
1483 
1484         nl = MDOC_NEWLINE & m->flags;
1485 
1486         /*
1487          * A line macro that has a fixed number of arguments (maxargs).
1488          * Only open the scope once the first non-leading-punctuation is
1489          * found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
1490          * keep it open until the maximum number of arguments are
1491          * exhausted.
1492          */
1493 
1494         switch (tok) {
1495         case (MDOC_Ap):
1496                 /* FALLTHROUGH */
1497         case (MDOC_No):
1498                 /* FALLTHROUGH */
1499         case (MDOC_Ns):
1500                 /* FALLTHROUGH */
1501         case (MDOC_Ux):
1502                 maxargs = 0;
1503                 break;
1504         case (MDOC_Bx):
1505                 /* FALLTHROUGH */
1506         case (MDOC_Xr):
1507                 maxargs = 2;
1508                 break;
1509         default:
1510                 maxargs = 1;
1511                 break;
1512         }
1513 
1514         for (arg = NULL; ; ) {
1515                 la = *pos;
1516                 av = mdoc_argv(m, line, tok, &arg, pos, buf);
1517 
1518                 if (ARGV_WORD == av) {
1519                         *pos = la;
1520                         break;
1521                 } 
1522 
1523                 if (ARGV_EOLN == av)
1524                         break;
1525                 if (ARGV_ARG == av)
1526                         continue;
1527 
1528                 mdoc_argv_free(arg);
1529                 return(0);
1530         }
1531 
1532         for (flushed = j = 0; ; ) {
1533                 la = *pos;
1534                 ac = mdoc_args(m, line, pos, buf, tok, &p);
1535 
1536                 if (ARGS_ERROR == ac)
1537                         return(0);
1538                 if (ARGS_PUNCT == ac)
1539                         break;
1540                 if (ARGS_EOLN == ac)
1541                         break;
1542 
1543                 if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) && 
1544                                 ARGS_QWORD != ac && 0 == j && 
1545                                 DELIM_OPEN == mdoc_isdelim(p)) {
1546                         if ( ! dword(m, line, la, p, DELIM_OPEN))
1547                                 return(0);
1548                         continue;
1549                 } else if (0 == j)
1550                        if ( ! mdoc_elem_alloc(m, line, la, tok, arg))
1551                                return(0);
1552 
1553                 if (j == maxargs && ! flushed) {
1554                         if ( ! rew_elem(m, tok))
1555                                 return(0);
1556                         flushed = 1;
1557                 }
1558 
1559                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1560 
1561                 if (MDOC_MAX != ntok) {
1562                         if ( ! flushed && ! rew_elem(m, tok))
1563                                 return(0);
1564                         flushed = 1;
1565                         if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1566                                 return(0);
1567                         j++;
1568                         break;
1569                 }
1570 
1571                 if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1572                                 ARGS_QWORD != ac &&
1573                                 ! flushed &&
1574                                 DELIM_NONE != mdoc_isdelim(p)) {
1575                         if ( ! rew_elem(m, tok))
1576                                 return(0);
1577                         flushed = 1;
1578                 }
1579 
1580                 if ( ! dword(m, line, la, p, DELIM_MAX))

1581                         return(0);
1582                 j++;
1583         }
1584 
1585         if (0 == j && ! mdoc_elem_alloc(m, line, la, tok, arg))
1586                return(0);
1587 
1588         /* Close out in a consistent state. */
1589 
1590         if ( ! flushed && ! rew_elem(m, tok))
1591                 return(0);
1592         if ( ! nl)
1593                 return(1);
1594         return(append_delims(m, line, pos, buf));
1595 }
1596 
1597 
1598 static int
1599 in_line_eoln(MACRO_PROT_ARGS)
1600 {
1601         int              la;
1602         enum margserr    ac;
1603         enum margverr    av;
1604         struct mdoc_arg *arg;
1605         char            *p;
1606         enum mdoct       ntok;
1607 
1608         assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
1609 
1610         if (tok == MDOC_Pp)
1611                 rew_sub(MDOC_BLOCK, m, MDOC_Nm, line, ppos);
1612 
1613         /* Parse macro arguments. */
1614 
1615         for (arg = NULL; ; ) {
1616                 la = *pos;
1617                 av = mdoc_argv(m, line, tok, &arg, pos, buf);
1618 
1619                 if (ARGV_WORD == av) {
1620                         *pos = la;
1621                         break;
1622                 }
1623                 if (ARGV_EOLN == av) 
1624                         break;
1625                 if (ARGV_ARG == av)
1626                         continue;
1627 
1628                 mdoc_argv_free(arg);
1629                 return(0);
1630         }
1631 
1632         /* Open element scope. */
1633 
1634         if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1635                 return(0);
1636 
1637         /* Parse argument terms. */
1638 
1639         for (;;) {
1640                 la = *pos;
1641                 ac = mdoc_args(m, line, pos, buf, tok, &p);
1642 
1643                 if (ARGS_ERROR == ac)
1644                         return(0);
1645                 if (ARGS_EOLN == ac)
1646                         break;
1647 
1648                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1649 
1650                 if (MDOC_MAX == ntok) {
1651                         if ( ! dword(m, line, la, p, DELIM_MAX))

1652                                 return(0);
1653                         continue;
1654                 }
1655 
1656                 if ( ! rew_elem(m, tok))
1657                         return(0);
1658                 return(mdoc_macro(m, ntok, line, la, pos, buf));
1659         }
1660 
1661         /* Close out (no delimiters). */
1662 
1663         return(rew_elem(m, tok));
1664 }
1665 
1666 
1667 /* ARGSUSED */
1668 static int
1669 ctx_synopsis(MACRO_PROT_ARGS)
1670 {
1671         int              nl;
1672 
1673         nl = MDOC_NEWLINE & m->flags;
1674 
1675         /* If we're not in the SYNOPSIS, go straight to in-line. */
1676         if ( ! (MDOC_SYNOPSIS & m->flags))
1677                 return(in_line(m, tok, line, ppos, pos, buf));
1678 
1679         /* If we're a nested call, same place. */
1680         if ( ! nl)
1681                 return(in_line(m, tok, line, ppos, pos, buf));
1682 
1683         /*
1684          * XXX: this will open a block scope; however, if later we end
1685          * up formatting the block scope, then child nodes will inherit
1686          * the formatting.  Be careful.
1687          */
1688         if (MDOC_Nm == tok)
1689                 return(blk_full(m, tok, line, ppos, pos, buf));
1690         assert(MDOC_Vt == tok);
1691         return(blk_part_imp(m, tok, line, ppos, pos, buf));
1692 }
1693 
1694 
1695 /* ARGSUSED */
1696 static int
1697 obsolete(MACRO_PROT_ARGS)
1698 {
1699 
1700         mdoc_pmsg(m, line, ppos, MANDOCERR_MACROOBS);
1701         return(1);
1702 }
1703 
1704 
1705 /*
1706  * Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
1707  * They're unusual because they're basically free-form text until a
1708  * macro is encountered.
1709  */
1710 static int
1711 phrase(struct mdoc *m, int line, int ppos, char *buf)
1712 {
1713         int              la, pos;
1714         enum margserr    ac;
1715         enum mdoct       ntok;
1716         char            *p;
1717 
1718         for (pos = ppos; ; ) {
1719                 la = pos;
1720 
1721                 ac = mdoc_zargs(m, line, &pos, buf, &p);
1722 
1723                 if (ARGS_ERROR == ac)
1724                         return(0);
1725                 if (ARGS_EOLN == ac)
1726                         break;
1727 
1728                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1729 
1730                 if (MDOC_MAX == ntok) {
1731                         if ( ! dword(m, line, la, p, DELIM_MAX))
1732                                 return(0);
1733                         continue;
1734                 }
1735 
1736                 if ( ! mdoc_macro(m, ntok, line, la, &pos, buf))
1737                         return(0);
1738                 return(append_delims(m, line, &pos, buf));
1739         }
1740 
1741         return(1);
1742 }
1743 
1744 
1745 /* ARGSUSED */
1746 static int
1747 phrase_ta(MACRO_PROT_ARGS)
1748 {

1749         int               la;
1750         enum mdoct        ntok;
1751         enum margserr     ac;
1752         char             *p;
1753 
1754         /*
1755          * FIXME: this is overly restrictive: if the `Ta' is unexpected,
1756          * it should simply error out with ARGSLOST.
1757          */




1758 
1759         if ( ! rew_sub(MDOC_BODY, m, MDOC_It, line, ppos))

1760                 return(0);
1761         if ( ! mdoc_body_alloc(m, line, ppos, MDOC_It))
1762                 return(0);
1763 
1764         for (;;) {
1765                 la = *pos;
1766                 ac = mdoc_zargs(m, line, pos, buf, &p);
1767 
1768                 if (ARGS_ERROR == ac)
1769                         return(0);
1770                 if (ARGS_EOLN == ac)
1771                         break;
1772 
1773                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1774 
1775                 if (MDOC_MAX == ntok) {
1776                         if ( ! dword(m, line, la, p, DELIM_MAX))

1777                                 return(0);
1778                         continue;
1779                 }
1780 
1781                 if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1782                         return(0);
1783                 return(append_delims(m, line, pos, buf));
1784         }
1785 
1786         return(1);
1787 }
   1 /*      $Id: mdoc_macro.c,v 1.125 2013/12/24 20:45:27 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010, 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21 
  22 #include <assert.h>
  23 #include <ctype.h>
  24 #include <stdlib.h>


  34 enum    rew {   /* see rew_dohalt() */
  35         REWIND_NONE,
  36         REWIND_THIS,
  37         REWIND_MORE,
  38         REWIND_FORCE,
  39         REWIND_LATER,
  40         REWIND_ERROR
  41 };
  42 
  43 static  int             blk_full(MACRO_PROT_ARGS);
  44 static  int             blk_exp_close(MACRO_PROT_ARGS);
  45 static  int             blk_part_exp(MACRO_PROT_ARGS);
  46 static  int             blk_part_imp(MACRO_PROT_ARGS);
  47 static  int             ctx_synopsis(MACRO_PROT_ARGS);
  48 static  int             in_line_eoln(MACRO_PROT_ARGS);
  49 static  int             in_line_argn(MACRO_PROT_ARGS);
  50 static  int             in_line(MACRO_PROT_ARGS);
  51 static  int             obsolete(MACRO_PROT_ARGS);
  52 static  int             phrase_ta(MACRO_PROT_ARGS);
  53 
  54 static  int             dword(struct mdoc *, int, int, const char *,
  55                                  enum mdelim, int);
  56 static  int             append_delims(struct mdoc *, 
  57                                 int, int *, char *);
  58 static  enum mdoct      lookup(enum mdoct, const char *);
  59 static  enum mdoct      lookup_raw(const char *);
  60 static  int             make_pending(struct mdoc_node *, enum mdoct,
  61                                 struct mdoc *, int, int);
  62 static  int             phrase(struct mdoc *, int, int, char *);
  63 static  enum mdoct      rew_alt(enum mdoct);
  64 static  enum rew        rew_dohalt(enum mdoct, enum mdoc_type, 
  65                                 const struct mdoc_node *);
  66 static  int             rew_elem(struct mdoc *, enum mdoct);
  67 static  int             rew_last(struct mdoc *, 
  68                                 const struct mdoc_node *);
  69 static  int             rew_sub(enum mdoc_type, struct mdoc *, 
  70                                 enum mdoct, int, int);
  71 
  72 const   struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
  73         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ap */
  74         { in_line_eoln, MDOC_PROLOGUE }, /* Dd */
  75         { in_line_eoln, MDOC_PROLOGUE }, /* Dt */
  76         { in_line_eoln, MDOC_PROLOGUE }, /* Os */
  77         { blk_full, MDOC_PARSED | MDOC_JOIN }, /* Sh */
  78         { blk_full, MDOC_PARSED | MDOC_JOIN }, /* Ss */
  79         { in_line_eoln, 0 }, /* Pp */
  80         { blk_part_imp, MDOC_PARSED | MDOC_JOIN }, /* D1 */
  81         { blk_part_imp, MDOC_PARSED | MDOC_JOIN }, /* Dl */
  82         { blk_full, MDOC_EXPLICIT }, /* Bd */
  83         { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ed */
  84         { blk_full, MDOC_EXPLICIT }, /* Bl */
  85         { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* El */
  86         { blk_full, MDOC_PARSED | MDOC_JOIN }, /* It */
  87         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
  88         { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* An */
  89         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
  90         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cd */
  91         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
  92         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
  93         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
  94         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
  95         { in_line_eoln, 0 }, /* Ex */
  96         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */
  97         { in_line_eoln, 0 }, /* Fd */
  98         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
  99         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */
 100         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */
 101         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */
 102         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
 103         { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Li */
 104         { blk_full, MDOC_JOIN }, /* Nd */
 105         { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
 106         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
 107         { obsolete, 0 }, /* Ot */
 108         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
 109         { in_line_eoln, 0 }, /* Rv */
 110         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */
 111         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
 112         { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
 113         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
 114         { in_line_eoln, MDOC_JOIN }, /* %A */
 115         { in_line_eoln, MDOC_JOIN }, /* %B */
 116         { in_line_eoln, MDOC_JOIN }, /* %D */
 117         { in_line_eoln, MDOC_JOIN }, /* %I */
 118         { in_line_eoln, MDOC_JOIN }, /* %J */
 119         { in_line_eoln, 0 }, /* %N */
 120         { in_line_eoln, MDOC_JOIN }, /* %O */
 121         { in_line_eoln, 0 }, /* %P */
 122         { in_line_eoln, MDOC_JOIN }, /* %R */
 123         { in_line_eoln, MDOC_JOIN }, /* %T */
 124         { in_line_eoln, 0 }, /* %V */
 125         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 126                          MDOC_EXPLICIT | MDOC_JOIN }, /* Ac */
 127         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
 128                         MDOC_EXPLICIT | MDOC_JOIN }, /* Ao */
 129         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Aq */
 130         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
 131         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 132                          MDOC_EXPLICIT | MDOC_JOIN }, /* Bc */
 133         { blk_full, MDOC_EXPLICIT }, /* Bf */
 134         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
 135                         MDOC_EXPLICIT | MDOC_JOIN }, /* Bo */
 136         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Bq */
 137         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
 138         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
 139         { in_line_eoln, 0 }, /* Db */
 140         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 141                          MDOC_EXPLICIT | MDOC_JOIN }, /* Dc */
 142         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
 143                         MDOC_EXPLICIT | MDOC_JOIN }, /* Do */
 144         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Dq */
 145         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ec */
 146         { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ef */
 147         { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Em */
 148         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
 149         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
 150         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
 151         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED |
 152                         MDOC_IGNDELIM | MDOC_JOIN }, /* No */
 153         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED |
 154                         MDOC_IGNDELIM | MDOC_JOIN }, /* Ns */
 155         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
 156         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
 157         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 158                          MDOC_EXPLICIT | MDOC_JOIN }, /* Pc */
 159         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
 160         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
 161                         MDOC_EXPLICIT | MDOC_JOIN }, /* Po */
 162         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Pq */
 163         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 164                          MDOC_EXPLICIT | MDOC_JOIN }, /* Qc */
 165         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ql */
 166         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
 167                         MDOC_EXPLICIT | MDOC_JOIN }, /* Qo */
 168         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Qq */
 169         { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Re */
 170         { blk_full, MDOC_EXPLICIT }, /* Rs */
 171         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 172                          MDOC_EXPLICIT | MDOC_JOIN }, /* Sc */
 173         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
 174                         MDOC_EXPLICIT | MDOC_JOIN }, /* So */
 175         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sq */
 176         { in_line_eoln, 0 }, /* Sm */
 177         { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sx */
 178         { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sy */
 179         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
 180         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ux */
 181         { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
 182         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
 183         { blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */
 184         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 185                          MDOC_EXPLICIT | MDOC_JOIN }, /* Fc */
 186         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
 187                         MDOC_EXPLICIT | MDOC_JOIN }, /* Oo */
 188         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 189                          MDOC_EXPLICIT | MDOC_JOIN }, /* Oc */
 190         { blk_full, MDOC_EXPLICIT }, /* Bk */
 191         { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ek */
 192         { in_line_eoln, 0 }, /* Bt */
 193         { in_line_eoln, 0 }, /* Hf */
 194         { obsolete, 0 }, /* Fr */
 195         { in_line_eoln, 0 }, /* Ud */
 196         { in_line, 0 }, /* Lb */
 197         { in_line_eoln, 0 }, /* Lp */
 198         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */
 199         { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */
 200         { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Brq */
 201         { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
 202                         MDOC_EXPLICIT | MDOC_JOIN }, /* Bro */
 203         { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
 204                          MDOC_EXPLICIT | MDOC_JOIN }, /* Brc */
 205         { in_line_eoln, MDOC_JOIN }, /* %C */
 206         { obsolete, 0 }, /* Es */
 207         { obsolete, 0 }, /* En */
 208         { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
 209         { in_line_eoln, MDOC_JOIN }, /* %Q */
 210         { in_line_eoln, 0 }, /* br */
 211         { in_line_eoln, 0 }, /* sp */
 212         { in_line_eoln, 0 }, /* %U */
 213         { phrase_ta, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ta */
 214 };
 215 
 216 const   struct mdoc_macro * const mdoc_macros = __mdoc_macros;
 217 
 218 
 219 /*
 220  * This is called at the end of parsing.  It must traverse up the tree,
 221  * closing out open [implicit] scopes.  Obviously, open explicit scopes
 222  * are errors.
 223  */
 224 int
 225 mdoc_macroend(struct mdoc *mdoc)
 226 {
 227         struct mdoc_node *n;
 228 
 229         /* Scan for open explicit scopes. */
 230 
 231         n = MDOC_VALID & mdoc->last->flags ?
 232                         mdoc->last->parent : mdoc->last;
 233 
 234         for ( ; n; n = n->parent)
 235                 if (MDOC_BLOCK == n->type &&
 236                     MDOC_EXPLICIT & mdoc_macros[n->tok].flags)
 237                         mdoc_nmsg(mdoc, n, MANDOCERR_SCOPEEXIT);
 238 
 239         /* Rewind to the first. */
 240 
 241         return(rew_last(mdoc, mdoc->first));
 242 }
 243 
 244 
 245 /*
 246  * Look up a macro from within a subsequent context.
 247  */
 248 static enum mdoct
 249 lookup(enum mdoct from, const char *p)
 250 {
 251 
 252         if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
 253                 return(MDOC_MAX);
 254         return(lookup_raw(p));
 255 }
 256 
 257 
 258 /*
 259  * Lookup a macro following the initial line macro.
 260  */
 261 static enum mdoct


 266         if (MDOC_MAX == (res = mdoc_hash_find(p)))
 267                 return(MDOC_MAX);
 268         if (MDOC_CALLABLE & mdoc_macros[res].flags)
 269                 return(res);
 270         return(MDOC_MAX);
 271 }
 272 
 273 
 274 static int
 275 rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
 276 {
 277         struct mdoc_node *n, *np;
 278 
 279         assert(to);
 280         mdoc->next = MDOC_NEXT_SIBLING;
 281 
 282         /* LINTED */
 283         while (mdoc->last != to) {
 284                 /*
 285                  * Save the parent here, because we may delete the
 286                  * mdoc->last node in the post-validation phase and reset
 287                  * it to mdoc->last->parent, causing a step in the closing
 288                  * out to be lost.
 289                  */
 290                 np = mdoc->last->parent;
 291                 if ( ! mdoc_valid_post(mdoc))
 292                         return(0);
 293                 n = mdoc->last;
 294                 mdoc->last = np;
 295                 assert(mdoc->last);
 296                 mdoc->last->last = n;
 297         }
 298 
 299         return(mdoc_valid_post(mdoc));
 300 }
 301 
 302 
 303 /*
 304  * For a block closing macro, return the corresponding opening one.
 305  * Otherwise, return the macro itself.
 306  */
 307 static enum mdoct


 463         struct mdoc_node *n;
 464 
 465         n = mdoc->last;
 466         if (MDOC_ELEM != n->type)
 467                 n = n->parent;
 468         assert(MDOC_ELEM == n->type);
 469         assert(tok == n->tok);
 470 
 471         return(rew_last(mdoc, n));
 472 }
 473 
 474 
 475 /*
 476  * We are trying to close a block identified by tok,
 477  * but the child block *broken is still open.
 478  * Thus, postpone closing the tok block
 479  * until the rew_sub call closing *broken.
 480  */
 481 static int
 482 make_pending(struct mdoc_node *broken, enum mdoct tok,
 483                 struct mdoc *mdoc, int line, int ppos)
 484 {
 485         struct mdoc_node *breaker;
 486 
 487         /*
 488          * Iterate backwards, searching for the block matching tok,
 489          * that is, the block breaking the *broken block.
 490          */
 491         for (breaker = broken->parent; breaker; breaker = breaker->parent) {
 492 
 493                 /*
 494                  * If the *broken block had already been broken before
 495                  * and we encounter its breaker, make the tok block
 496                  * pending on the inner breaker.
 497                  * Graphically, "[A breaker=[B broken=[C->B B] tok=A] C]"
 498                  * becomes "[A broken=[B [C->B B] tok=A] C]"
 499                  * and finally "[A [B->A [C->B B] A] C]".
 500                  */
 501                 if (breaker == broken->pending) {
 502                         broken = breaker;
 503                         continue;


 518                  * becomes "[A breaker=[B->A broken=[C A] tok=B] C]"
 519                  * and finally "[A [B->A [C->B A] B] C]".
 520                  */
 521                 if (broken->pending) {
 522                         struct mdoc_node *taker;
 523 
 524                         /*
 525                          * If the breaker had also been broken before,
 526                          * it cannot take on the outer breaker itself,
 527                          * but must hand it on to its own breakers.
 528                          * Graphically, this is the following situation:
 529                          * "[A [B breaker=[C->B B] broken=[D->A A] tok=C] D]"
 530                          * "[A taker=[B->A breaker=[C->B B] [D->C A] C] D]"
 531                          */
 532                         taker = breaker;
 533                         while (taker->pending)
 534                                 taker = taker->pending;
 535                         taker->pending = broken->pending;
 536                 }
 537                 broken->pending = breaker;
 538                 mandoc_vmsg(MANDOCERR_SCOPENEST, mdoc->parse, line, ppos,
 539                                 "%s breaks %s", mdoc_macronames[tok],
 540                                 mdoc_macronames[broken->tok]);
 541                 return(1);
 542         }
 543 
 544         /*
 545          * Found no matching block for tok.
 546          * Are you trying to close a block that is not open?
 547          */
 548         return(0);
 549 }
 550 
 551 
 552 static int
 553 rew_sub(enum mdoc_type t, struct mdoc *mdoc, 
 554                 enum mdoct tok, int line, int ppos)
 555 {
 556         struct mdoc_node *n;
 557 
 558         n = mdoc->last;
 559         while (n) {
 560                 switch (rew_dohalt(tok, t, n)) {
 561                 case (REWIND_NONE):
 562                         return(1);
 563                 case (REWIND_THIS):
 564                         n->lastline = line -
 565                             (MDOC_NEWLINE & mdoc->flags &&
 566                              ! (MDOC_EXPLICIT & mdoc_macros[tok].flags));
 567                         break;
 568                 case (REWIND_FORCE):
 569                         mandoc_vmsg(MANDOCERR_SCOPEBROKEN, mdoc->parse, 
 570                                         line, ppos, "%s breaks %s", 
 571                                         mdoc_macronames[tok],
 572                                         mdoc_macronames[n->tok]);
 573                         /* FALLTHROUGH */
 574                 case (REWIND_MORE):
 575                         n->lastline = line -
 576                             (MDOC_NEWLINE & mdoc->flags ? 1 : 0);
 577                         n = n->parent;
 578                         continue;
 579                 case (REWIND_LATER):
 580                         if (make_pending(n, tok, mdoc, line, ppos) ||
 581                             MDOC_BLOCK != t)
 582                                 return(1);
 583                         /* FALLTHROUGH */
 584                 case (REWIND_ERROR):
 585                         mdoc_pmsg(mdoc, line, ppos, MANDOCERR_NOSCOPE);
 586                         return(1);
 587                 }
 588                 break;
 589         }
 590 
 591         assert(n);
 592         if ( ! rew_last(mdoc, n))
 593                 return(0);
 594 
 595         /*
 596          * The current block extends an enclosing block.
 597          * Now that the current block ends, close the enclosing block, too.
 598          */
 599         while (NULL != (n = n->pending)) {
 600                 if ( ! rew_last(mdoc, n))
 601                         return(0);
 602                 if (MDOC_HEAD == n->type &&
 603                     ! mdoc_body_alloc(mdoc, n->line, n->pos, n->tok))
 604                         return(0);
 605         }
 606 
 607         return(1);
 608 }
 609 
 610 /*
 611  * Allocate a word and check whether it's punctuation or not.
 612  * Punctuation consists of those tokens found in mdoc_isdelim().
 613  */
 614 static int
 615 dword(struct mdoc *mdoc, int line, int col, const char *p,
 616                 enum mdelim d, int may_append)
 617 {
 618         
 619         if (DELIM_MAX == d)
 620                 d = mdoc_isdelim(p);
 621 
 622         if (may_append &&
 623             ! ((MDOC_SYNOPSIS | MDOC_KEEP | MDOC_SMOFF) & mdoc->flags) &&
 624             DELIM_NONE == d && MDOC_TEXT == mdoc->last->type &&
 625             DELIM_NONE == mdoc_isdelim(mdoc->last->string)) {
 626                 mdoc_word_append(mdoc, p);
 627                 return(1);
 628         }
 629 
 630         if ( ! mdoc_word_alloc(mdoc, line, col, p))
 631                 return(0);
 632 
 633         if (DELIM_OPEN == d)
 634                 mdoc->last->flags |= MDOC_DELIMO;
 635 
 636         /*
 637          * Closing delimiters only suppress the preceding space
 638          * when they follow something, not when they start a new
 639          * block or element, and not when they follow `No'.
 640          *
 641          * XXX  Explicitly special-casing MDOC_No here feels
 642          *      like a layering violation.  Find a better way
 643          *      and solve this in the code related to `No'!
 644          */
 645 
 646         else if (DELIM_CLOSE == d && mdoc->last->prev &&
 647                         mdoc->last->prev->tok != MDOC_No &&
 648                         mdoc->last->parent->tok != MDOC_Fd)
 649                 mdoc->last->flags |= MDOC_DELIMC;
 650 
 651         return(1);
 652 }
 653 
 654 static int
 655 append_delims(struct mdoc *mdoc, int line, int *pos, char *buf)
 656 {
 657         int              la;
 658         enum margserr    ac;
 659         char            *p;
 660 
 661         if ('\0' == buf[*pos])
 662                 return(1);
 663 
 664         for (;;) {
 665                 la = *pos;
 666                 ac = mdoc_zargs(mdoc, line, pos, buf, &p);
 667 
 668                 if (ARGS_ERROR == ac)
 669                         return(0);
 670                 else if (ARGS_EOLN == ac)
 671                         break;
 672 
 673                 dword(mdoc, line, la, p, DELIM_MAX, 1);
 674 
 675                 /*
 676                  * If we encounter end-of-sentence symbols, then trigger
 677                  * the double-space.
 678                  *
 679                  * XXX: it's easy to allow this to propagate outward to
 680                  * the last symbol, such that `. )' will cause the
 681                  * correct double-spacing.  However, (1) groff isn't
 682                  * smart enough to do this and (2) it would require
 683                  * knowing which symbols break this behaviour, for
 684                  * example, `.  ;' shouldn't propagate the double-space.
 685                  */
 686                 if (mandoc_eos(p, strlen(p), 0))
 687                         mdoc->last->flags |= MDOC_EOS;
 688         }
 689 
 690         return(1);
 691 }
 692 
 693 
 694 /*
 695  * Close out block partial/full explicit.  
 696  */
 697 static int
 698 blk_exp_close(MACRO_PROT_ARGS)
 699 {
 700         struct mdoc_node *body;         /* Our own body. */
 701         struct mdoc_node *later;        /* A sub-block starting later. */
 702         struct mdoc_node *n;            /* For searching backwards. */
 703 
 704         int              j, lastarg, maxargs, flushed, nl;
 705         enum margserr    ac;
 706         enum mdoct       atok, ntok;
 707         char            *p;
 708 
 709         nl = MDOC_NEWLINE & mdoc->flags;
 710 
 711         switch (tok) {
 712         case (MDOC_Ec):
 713                 maxargs = 1;
 714                 break;
 715         case (MDOC_Ek):
 716                 mdoc->flags &= ~MDOC_KEEP;
 717         default:
 718                 maxargs = 0;
 719                 break;
 720         }
 721 
 722         /*
 723          * Search backwards for beginnings of blocks,
 724          * both of our own and of pending sub-blocks.
 725          */
 726         atok = rew_alt(tok);
 727         body = later = NULL;
 728         for (n = mdoc->last; n; n = n->parent) {
 729                 if (MDOC_VALID & n->flags)
 730                         continue;
 731 
 732                 /* Remember the start of our own body. */
 733                 if (MDOC_BODY == n->type && atok == n->tok) {
 734                         if (ENDBODY_NOT == n->end)
 735                                 body = n;
 736                         continue;
 737                 }
 738 
 739                 if (MDOC_BLOCK != n->type || MDOC_Nm == n->tok)
 740                         continue;
 741                 if (atok == n->tok) {
 742                         assert(body);
 743 
 744                         /*
 745                          * Found the start of our own block.
 746                          * When there is no pending sub block,
 747                          * just proceed to closing out.
 748                          */
 749                         if (NULL == later)
 750                                 break;
 751 
 752                         /* 
 753                          * When there is a pending sub block,
 754                          * postpone closing out the current block
 755                          * until the rew_sub() closing out the sub-block.
 756                          */
 757                         make_pending(later, tok, mdoc, line, ppos);
 758 
 759                         /*
 760                          * Mark the place where the formatting - but not
 761                          * the scope - of the current block ends.
 762                          */
 763                         if ( ! mdoc_endbody_alloc(mdoc, line, ppos,
 764                             atok, body, ENDBODY_SPACE))
 765                                 return(0);
 766                         break;
 767                 }
 768 
 769                 /*
 770                  * When finding an open sub block, remember the last
 771                  * open explicit block, or, in case there are only
 772                  * implicit ones, the first open implicit block.
 773                  */
 774                 if (later &&
 775                     MDOC_EXPLICIT & mdoc_macros[later->tok].flags)
 776                         continue;
 777                 if (MDOC_It != n->tok)
 778                         later = n;
 779         }
 780 
 781         if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
 782                 /* FIXME: do this in validate */
 783                 if (buf[*pos]) 
 784                         mdoc_pmsg(mdoc, line, ppos, MANDOCERR_ARGSLOST);
 785 
 786                 if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
 787                         return(0);
 788                 return(rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos));
 789         }
 790 
 791         if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
 792                 return(0);
 793 
 794         if (NULL == later && maxargs > 0) 
 795                 if ( ! mdoc_tail_alloc(mdoc, line, ppos, rew_alt(tok)))
 796                         return(0);
 797 
 798         for (flushed = j = 0; ; j++) {
 799                 lastarg = *pos;
 800 
 801                 if (j == maxargs && ! flushed) {
 802                         if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
 803                                 return(0);
 804                         flushed = 1;
 805                 }
 806 
 807                 ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
 808 
 809                 if (ARGS_ERROR == ac)
 810                         return(0);
 811                 if (ARGS_PUNCT == ac)
 812                         break;
 813                 if (ARGS_EOLN == ac)
 814                         break;
 815 
 816                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
 817 
 818                 if (MDOC_MAX == ntok) {
 819                         if ( ! dword(mdoc, line, lastarg, p, DELIM_MAX,
 820                             MDOC_JOIN & mdoc_macros[tok].flags))
 821                                 return(0);
 822                         continue;
 823                 }
 824 
 825                 if ( ! flushed) {
 826                         if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
 827                                 return(0);
 828                         flushed = 1;
 829                 }
 830 
 831                 mdoc->flags &= ~MDOC_NEWLINE;
 832 
 833                 if ( ! mdoc_macro(mdoc, ntok, line, lastarg, pos, buf))
 834                         return(0);
 835                 break;
 836         }
 837 
 838         if ( ! flushed && ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
 839                 return(0);
 840 
 841         if ( ! nl)
 842                 return(1);
 843         return(append_delims(mdoc, line, pos, buf));
 844 }
 845 
 846 
 847 static int
 848 in_line(MACRO_PROT_ARGS)
 849 {
 850         int              la, scope, cnt, nc, nl;
 851         enum margverr    av;
 852         enum mdoct       ntok;
 853         enum margserr    ac;
 854         enum mdelim      d;
 855         struct mdoc_arg *arg;
 856         char            *p;
 857 
 858         nl = MDOC_NEWLINE & mdoc->flags;
 859 
 860         /*
 861          * Whether we allow ignored elements (those without content,
 862          * usually because of reserved words) to squeak by.
 863          */
 864 
 865         switch (tok) {
 866         case (MDOC_An):
 867                 /* FALLTHROUGH */
 868         case (MDOC_Ar):
 869                 /* FALLTHROUGH */
 870         case (MDOC_Fl):
 871                 /* FALLTHROUGH */
 872         case (MDOC_Mt):
 873                 /* FALLTHROUGH */
 874         case (MDOC_Nm):
 875                 /* FALLTHROUGH */
 876         case (MDOC_Pa):
 877                 nc = 1;
 878                 break;
 879         default:
 880                 nc = 0;
 881                 break;
 882         }
 883 
 884         for (arg = NULL;; ) {
 885                 la = *pos;
 886                 av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
 887 
 888                 if (ARGV_WORD == av) {
 889                         *pos = la;
 890                         break;
 891                 } 
 892                 if (ARGV_EOLN == av)
 893                         break;
 894                 if (ARGV_ARG == av)
 895                         continue;
 896 
 897                 mdoc_argv_free(arg);
 898                 return(0);
 899         }
 900 
 901         for (cnt = scope = 0;; ) {
 902                 la = *pos;
 903                 ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
 904 
 905                 if (ARGS_ERROR == ac)
 906                         return(0);
 907                 if (ARGS_EOLN == ac)
 908                         break;
 909                 if (ARGS_PUNCT == ac)
 910                         break;
 911 
 912                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
 913 
 914                 /* 
 915                  * In this case, we've located a submacro and must
 916                  * execute it.  Close out scope, if open.  If no
 917                  * elements have been generated, either create one (nc)
 918                  * or raise a warning.
 919                  */
 920 
 921                 if (MDOC_MAX != ntok) {
 922                         if (scope && ! rew_elem(mdoc, tok))
 923                                 return(0);
 924                         if (nc && 0 == cnt) {
 925                                 if ( ! mdoc_elem_alloc(mdoc, line,
 926                                                 ppos, tok, arg))
 927                                         return(0);
 928                                 if ( ! rew_last(mdoc, mdoc->last))
 929                                         return(0);
 930                         } else if ( ! nc && 0 == cnt) {
 931                                 mdoc_argv_free(arg);
 932                                 mdoc_pmsg(mdoc, line, ppos,
 933                                         MANDOCERR_MACROEMPTY);
 934                         }
 935 
 936                         if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
 937                                 return(0);
 938                         if ( ! nl)
 939                                 return(1);
 940                         return(append_delims(mdoc, line, pos, buf));
 941                 } 
 942 
 943                 /* 
 944                  * Non-quote-enclosed punctuation.  Set up our scope, if
 945                  * a word; rewind the scope, if a delimiter; then append
 946                  * the word. 
 947                  */
 948 
 949                 d = ARGS_QWORD == ac ? DELIM_NONE : mdoc_isdelim(p);
 950 
 951                 if (DELIM_NONE != d) {
 952                         /*
 953                          * If we encounter closing punctuation, no word
 954                          * has been omitted, no scope is open, and we're
 955                          * allowed to have an empty element, then start
 956                          * a new scope.  `Ar', `Fl', and `Li', only do
 957                          * this once per invocation.  There may be more
 958                          * of these (all of them?).
 959                          */
 960                         if (0 == cnt && (nc || MDOC_Li == tok) && 
 961                                         DELIM_CLOSE == d && ! scope) {
 962                                 if ( ! mdoc_elem_alloc(mdoc, line,
 963                                                 ppos, tok, arg))
 964                                         return(0);
 965                                 if (MDOC_Ar == tok || MDOC_Li == tok || 
 966                                                 MDOC_Fl == tok)
 967                                         cnt++;
 968                                 scope = 1;
 969                         }
 970                         /*
 971                          * Close out our scope, if one is open, before
 972                          * any punctuation.
 973                          */
 974                         if (scope && ! rew_elem(mdoc, tok))
 975                                 return(0);
 976                         scope = 0;
 977                 } else if ( ! scope) {
 978                         if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
 979                                 return(0);
 980                         scope = 1;
 981                 }
 982 
 983                 if (DELIM_NONE == d)
 984                         cnt++;
 985 
 986                 if ( ! dword(mdoc, line, la, p, d,
 987                     MDOC_JOIN & mdoc_macros[tok].flags))
 988                         return(0);
 989 
 990                 /*
 991                  * `Fl' macros have their scope re-opened with each new
 992                  * word so that the `-' can be added to each one without
 993                  * having to parse out spaces.
 994                  */
 995                 if (scope && MDOC_Fl == tok) {
 996                         if ( ! rew_elem(mdoc, tok))
 997                                 return(0);
 998                         scope = 0;
 999                 }
1000         }
1001 
1002         if (scope && ! rew_elem(mdoc, tok))
1003                 return(0);
1004 
1005         /*
1006          * If no elements have been collected and we're allowed to have
1007          * empties (nc), open a scope and close it out.  Otherwise,
1008          * raise a warning.
1009          */
1010 
1011         if (nc && 0 == cnt) {
1012                 if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1013                         return(0);
1014                 if ( ! rew_last(mdoc, mdoc->last))
1015                         return(0);
1016         } else if ( ! nc && 0 == cnt) {
1017                 mdoc_argv_free(arg);
1018                 mdoc_pmsg(mdoc, line, ppos, MANDOCERR_MACROEMPTY);
1019         }
1020 
1021         if ( ! nl)
1022                 return(1);
1023         return(append_delims(mdoc, line, pos, buf));
1024 }
1025 
1026 
1027 static int
1028 blk_full(MACRO_PROT_ARGS)
1029 {
1030         int               la, nl, nparsed;
1031         struct mdoc_arg  *arg;
1032         struct mdoc_node *head; /* save of head macro */
1033         struct mdoc_node *body; /* save of body macro */
1034         struct mdoc_node *n;
1035         enum mdoc_type    mtt;
1036         enum mdoct        ntok;
1037         enum margserr     ac, lac;
1038         enum margverr     av;
1039         char             *p;
1040 
1041         nl = MDOC_NEWLINE & mdoc->flags;
1042 
1043         /* Close out prior implicit scope. */
1044 
1045         if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
1046                 if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1047                         return(0);
1048                 if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1049                         return(0);
1050         }
1051 
1052         /*
1053          * This routine accommodates implicitly- and explicitly-scoped
1054          * macro openings.  Implicit ones first close out prior scope
1055          * (seen above).  Delay opening the head until necessary to
1056          * allow leading punctuation to print.  Special consideration
1057          * for `It -column', which has phrase-part syntax instead of
1058          * regular child nodes.
1059          */
1060 
1061         for (arg = NULL;; ) {
1062                 la = *pos;
1063                 av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1064 
1065                 if (ARGV_WORD == av) {
1066                         *pos = la;
1067                         break;
1068                 } 
1069 
1070                 if (ARGV_EOLN == av)
1071                         break;
1072                 if (ARGV_ARG == av)
1073                         continue;
1074 
1075                 mdoc_argv_free(arg);
1076                 return(0);
1077         }
1078 
1079         if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, arg))
1080                 return(0);
1081 
1082         head = body = NULL;
1083 
1084         /*
1085          * Exception: Heads of `It' macros in `-diag' lists are not
1086          * parsed, even though `It' macros in general are parsed.
1087          */
1088         nparsed = MDOC_It == tok &&
1089                 MDOC_Bl == mdoc->last->parent->tok &&
1090                 LIST_diag == mdoc->last->parent->norm->Bl.type;
1091 
1092         /*
1093          * The `Nd' macro has all arguments in its body: it's a hybrid
1094          * of block partial-explicit and full-implicit.  Stupid.
1095          */
1096 
1097         if (MDOC_Nd == tok) {
1098                 if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1099                         return(0);
1100                 head = mdoc->last;
1101                 if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1102                         return(0);
1103                 if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1104                         return(0);
1105                 body = mdoc->last;
1106         }
1107 
1108         if (MDOC_Bk == tok)
1109                 mdoc->flags |= MDOC_KEEP;
1110 
1111         ac = ARGS_ERROR;
1112 
1113         for ( ; ; ) {
1114                 la = *pos;
1115                 /* Initialise last-phrase-type with ARGS_PEND. */
1116                 lac = ARGS_ERROR == ac ? ARGS_PEND : ac;
1117                 ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1118 
1119                 if (ARGS_PUNCT == ac)
1120                         break;
1121 
1122                 if (ARGS_ERROR == ac)
1123                         return(0);
1124 
1125                 if (ARGS_EOLN == ac) {
1126                         if (ARGS_PPHRASE != lac && ARGS_PHRASE != lac)
1127                                 break;
1128                         /*
1129                          * This is necessary: if the last token on a
1130                          * line is a `Ta' or tab, then we'll get
1131                          * ARGS_EOLN, so we must be smart enough to
1132                          * reopen our scope if the last parse was a
1133                          * phrase or partial phrase.
1134                          */
1135                         if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1136                                 return(0);
1137                         if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1138                                 return(0);
1139                         body = mdoc->last;
1140                         break;
1141                 }
1142 
1143                 /* 
1144                  * Emit leading punctuation (i.e., punctuation before
1145                  * the MDOC_HEAD) for non-phrase types.
1146                  */
1147 
1148                 if (NULL == head && 
1149                                 ARGS_PEND != ac &&
1150                                 ARGS_PHRASE != ac &&
1151                                 ARGS_PPHRASE != ac &&
1152                                 ARGS_QWORD != ac &&
1153                                 DELIM_OPEN == mdoc_isdelim(p)) {
1154                         if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1155                                 return(0);
1156                         continue;
1157                 }
1158 
1159                 /* Open a head if one hasn't been opened. */
1160 
1161                 if (NULL == head) {
1162                         if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1163                                 return(0);
1164                         head = mdoc->last;
1165                 }
1166 
1167                 if (ARGS_PHRASE == ac || 
1168                                 ARGS_PEND == ac ||
1169                                 ARGS_PPHRASE == ac) {
1170                         /*
1171                          * If we haven't opened a body yet, rewind the
1172                          * head; if we have, rewind that instead.
1173                          */
1174 
1175                         mtt = body ? MDOC_BODY : MDOC_HEAD;
1176                         if ( ! rew_sub(mtt, mdoc, tok, line, ppos))
1177                                 return(0);
1178                         
1179                         /* Then allocate our body context. */
1180 
1181                         if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1182                                 return(0);
1183                         body = mdoc->last;
1184 
1185                         /*
1186                          * Process phrases: set whether we're in a
1187                          * partial-phrase (this effects line handling)
1188                          * then call down into the phrase parser.
1189                          */
1190 
1191                         if (ARGS_PPHRASE == ac)
1192                                 mdoc->flags |= MDOC_PPHRASE;
1193                         if (ARGS_PEND == ac && ARGS_PPHRASE == lac)
1194                                 mdoc->flags |= MDOC_PPHRASE;
1195 
1196                         if ( ! phrase(mdoc, line, la, buf))
1197                                 return(0);
1198 
1199                         mdoc->flags &= ~MDOC_PPHRASE;
1200                         continue;
1201                 }
1202 
1203                 ntok = nparsed || ARGS_QWORD == ac ? 
1204                         MDOC_MAX : lookup(tok, p);
1205 
1206                 if (MDOC_MAX == ntok) {
1207                         if ( ! dword(mdoc, line, la, p, DELIM_MAX,
1208                             MDOC_JOIN & mdoc_macros[tok].flags))
1209                                 return(0);
1210                         continue;
1211                 }
1212 
1213                 if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1214                         return(0);
1215                 break;
1216         }
1217 
1218         if (NULL == head) {
1219                 if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1220                         return(0);
1221                 head = mdoc->last;
1222         }
1223         
1224         if (nl && ! append_delims(mdoc, line, pos, buf))
1225                 return(0);
1226 
1227         /* If we've already opened our body, exit now. */
1228 
1229         if (NULL != body)
1230                 goto out;
1231 
1232         /*
1233          * If there is an open (i.e., unvalidated) sub-block requiring
1234          * explicit close-out, postpone switching the current block from
1235          * head to body until the rew_sub() call closing out that
1236          * sub-block.
1237          */
1238         for (n = mdoc->last; n && n != head; n = n->parent) {
1239                 if (MDOC_BLOCK == n->type && 
1240                                 MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
1241                                 ! (MDOC_VALID & n->flags)) {
1242                         n->pending = head;
1243                         return(1);
1244                 }
1245         }
1246 
1247         /* Close out scopes to remain in a consistent state. */
1248 
1249         if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1250                 return(0);
1251         if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1252                 return(0);
1253 
1254 out:
1255         if ( ! (MDOC_FREECOL & mdoc->flags))
1256                 return(1);
1257 
1258         if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1259                 return(0);
1260         if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1261                 return(0);
1262 
1263         mdoc->flags &= ~MDOC_FREECOL;
1264         return(1);
1265 }
1266 
1267 
1268 static int
1269 blk_part_imp(MACRO_PROT_ARGS)
1270 {
1271         int               la, nl;
1272         enum mdoct        ntok;
1273         enum margserr     ac;
1274         char             *p;
1275         struct mdoc_node *blk; /* saved block context */
1276         struct mdoc_node *body; /* saved body context */
1277         struct mdoc_node *n;
1278 
1279         nl = MDOC_NEWLINE & mdoc->flags;
1280 
1281         /*
1282          * A macro that spans to the end of the line.  This is generally
1283          * (but not necessarily) called as the first macro.  The block
1284          * has a head as the immediate child, which is always empty,
1285          * followed by zero or more opening punctuation nodes, then the
1286          * body (which may be empty, depending on the macro), then zero
1287          * or more closing punctuation nodes.
1288          */
1289 
1290         if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, NULL))
1291                 return(0);
1292 
1293         blk = mdoc->last;
1294 
1295         if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1296                 return(0);
1297         if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1298                 return(0);
1299 
1300         /*
1301          * Open the body scope "on-demand", that is, after we've
1302          * processed all our the leading delimiters (open parenthesis,
1303          * etc.).
1304          */
1305 
1306         for (body = NULL; ; ) {
1307                 la = *pos;
1308                 ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1309 
1310                 if (ARGS_ERROR == ac)
1311                         return(0);
1312                 if (ARGS_EOLN == ac)
1313                         break;
1314                 if (ARGS_PUNCT == ac)
1315                         break;
1316 
1317                 if (NULL == body && ARGS_QWORD != ac &&
1318                                 DELIM_OPEN == mdoc_isdelim(p)) {
1319                         if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1320                                 return(0);
1321                         continue;
1322                 }
1323 
1324                 if (NULL == body) {
1325                        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1326                                return(0);
1327                         body = mdoc->last;
1328                 }
1329 
1330                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1331 
1332                 if (MDOC_MAX == ntok) {
1333                         if ( ! dword(mdoc, line, la, p, DELIM_MAX,
1334                             MDOC_JOIN & mdoc_macros[tok].flags))
1335                                 return(0);
1336                         continue;
1337                 }
1338 
1339                 if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1340                         return(0);
1341                 break;
1342         }
1343 
1344         /* Clean-ups to leave in a consistent state. */
1345 
1346         if (NULL == body) {
1347                 if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1348                         return(0);
1349                 body = mdoc->last;
1350         }
1351 
1352         for (n = body->child; n && n->next; n = n->next)
1353                 /* Do nothing. */ ;
1354         
1355         /* 
1356          * End of sentence spacing: if the last node is a text node and
1357          * has a trailing period, then mark it as being end-of-sentence.
1358          */
1359 
1360         if (n && MDOC_TEXT == n->type && n->string)
1361                 if (mandoc_eos(n->string, strlen(n->string), 1))
1362                         n->flags |= MDOC_EOS;
1363 
1364         /* Up-propagate the end-of-space flag. */
1365 
1366         if (n && (MDOC_EOS & n->flags)) {
1367                 body->flags |= MDOC_EOS;
1368                 body->parent->flags |= MDOC_EOS;
1369         }
1370 
1371         /*
1372          * If there is an open sub-block requiring explicit close-out,
1373          * postpone closing out the current block
1374          * until the rew_sub() call closing out the sub-block.
1375          */
1376         for (n = mdoc->last; n && n != body && n != blk->parent;
1377                         n = n->parent) {
1378                 if (MDOC_BLOCK == n->type &&
1379                     MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
1380                     ! (MDOC_VALID & n->flags)) {
1381                         make_pending(n, tok, mdoc, line, ppos);
1382                         if ( ! mdoc_endbody_alloc(mdoc, line, ppos,
1383                             tok, body, ENDBODY_NOSPACE))
1384                                 return(0);
1385                         return(1);
1386                 }
1387         }
1388 
1389         /* 
1390          * If we can't rewind to our body, then our scope has already
1391          * been closed by another macro (like `Oc' closing `Op').  This
1392          * is ugly behaviour nodding its head to OpenBSD's overwhelming
1393          * crufty use of `Op' breakage.
1394          */
1395         if (n != body)
1396                 mandoc_vmsg(MANDOCERR_SCOPENEST, mdoc->parse, line, ppos, 
1397                                 "%s broken", mdoc_macronames[tok]);
1398 
1399         if (n && ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1400                 return(0);
1401 
1402         /* Standard appending of delimiters. */
1403 
1404         if (nl && ! append_delims(mdoc, line, pos, buf))
1405                 return(0);
1406 
1407         /* Rewind scope, if applicable. */
1408 
1409         if (n && ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1410                 return(0);
1411 
1412         /* Move trailing .Ns out of scope. */
1413 
1414         for (n = body->child; n && n->next; n = n->next)
1415                 /* Do nothing. */ ;
1416         if (n && MDOC_Ns == n->tok)
1417                 mdoc_node_relink(mdoc, n);
1418 
1419         return(1);
1420 }
1421 
1422 
1423 static int
1424 blk_part_exp(MACRO_PROT_ARGS)
1425 {
1426         int               la, nl;
1427         enum margserr     ac;
1428         struct mdoc_node *head; /* keep track of head */
1429         struct mdoc_node *body; /* keep track of body */
1430         char             *p;
1431         enum mdoct        ntok;
1432 
1433         nl = MDOC_NEWLINE & mdoc->flags;
1434 
1435         /*
1436          * The opening of an explicit macro having zero or more leading
1437          * punctuation nodes; a head with optional single element (the
1438          * case of `Eo'); and a body that may be empty.
1439          */
1440 
1441         if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, NULL))
1442                 return(0); 
1443 
1444         for (head = body = NULL; ; ) {
1445                 la = *pos;
1446                 ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1447 
1448                 if (ARGS_ERROR == ac)
1449                         return(0);
1450                 if (ARGS_PUNCT == ac)
1451                         break;
1452                 if (ARGS_EOLN == ac)
1453                         break;
1454 
1455                 /* Flush out leading punctuation. */
1456 
1457                 if (NULL == head && ARGS_QWORD != ac &&
1458                                 DELIM_OPEN == mdoc_isdelim(p)) {
1459                         assert(NULL == body);
1460                         if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1461                                 return(0);
1462                         continue;
1463                 }
1464 
1465                 if (NULL == head) {
1466                         assert(NULL == body);
1467                         if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1468                                 return(0);
1469                         head = mdoc->last;
1470                 }
1471 
1472                 /*
1473                  * `Eo' gobbles any data into the head, but most other
1474                  * macros just immediately close out and begin the body.
1475                  */
1476 
1477                 if (NULL == body) {
1478                         assert(head);
1479                         /* No check whether it's a macro! */
1480                         if (MDOC_Eo == tok)
1481                                 if ( ! dword(mdoc, line, la, p, DELIM_MAX, 0))
1482                                         return(0);
1483 
1484                         if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1485                                 return(0);
1486                         if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1487                                 return(0);
1488                         body = mdoc->last;
1489 
1490                         if (MDOC_Eo == tok)
1491                                 continue;
1492                 }
1493 
1494                 assert(NULL != head && NULL != body);
1495 
1496                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1497 
1498                 if (MDOC_MAX == ntok) {
1499                         if ( ! dword(mdoc, line, la, p, DELIM_MAX,
1500                             MDOC_JOIN & mdoc_macros[tok].flags))
1501                                 return(0);
1502                         continue;
1503                 }
1504 
1505                 if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1506                         return(0);
1507                 break;
1508         }
1509 
1510         /* Clean-up to leave in a consistent state. */
1511 
1512         if (NULL == head)
1513                 if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1514                         return(0);
1515 
1516         if (NULL == body) {
1517                 if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1518                         return(0);
1519                 if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1520                         return(0);
1521         }
1522 
1523         /* Standard appending of delimiters. */
1524 
1525         if ( ! nl)
1526                 return(1);
1527         return(append_delims(mdoc, line, pos, buf));
1528 }
1529 
1530 
1531 /* ARGSUSED */
1532 static int
1533 in_line_argn(MACRO_PROT_ARGS)
1534 {
1535         int              la, flushed, j, maxargs, nl;
1536         enum margserr    ac;
1537         enum margverr    av;
1538         struct mdoc_arg *arg;
1539         char            *p;
1540         enum mdoct       ntok;
1541 
1542         nl = MDOC_NEWLINE & mdoc->flags;
1543 
1544         /*
1545          * A line macro that has a fixed number of arguments (maxargs).
1546          * Only open the scope once the first non-leading-punctuation is
1547          * found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
1548          * keep it open until the maximum number of arguments are
1549          * exhausted.
1550          */
1551 
1552         switch (tok) {
1553         case (MDOC_Ap):
1554                 /* FALLTHROUGH */
1555         case (MDOC_No):
1556                 /* FALLTHROUGH */
1557         case (MDOC_Ns):
1558                 /* FALLTHROUGH */
1559         case (MDOC_Ux):
1560                 maxargs = 0;
1561                 break;
1562         case (MDOC_Bx):
1563                 /* FALLTHROUGH */
1564         case (MDOC_Xr):
1565                 maxargs = 2;
1566                 break;
1567         default:
1568                 maxargs = 1;
1569                 break;
1570         }
1571 
1572         for (arg = NULL; ; ) {
1573                 la = *pos;
1574                 av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1575 
1576                 if (ARGV_WORD == av) {
1577                         *pos = la;
1578                         break;
1579                 } 
1580 
1581                 if (ARGV_EOLN == av)
1582                         break;
1583                 if (ARGV_ARG == av)
1584                         continue;
1585 
1586                 mdoc_argv_free(arg);
1587                 return(0);
1588         }
1589 
1590         for (flushed = j = 0; ; ) {
1591                 la = *pos;
1592                 ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1593 
1594                 if (ARGS_ERROR == ac)
1595                         return(0);
1596                 if (ARGS_PUNCT == ac)
1597                         break;
1598                 if (ARGS_EOLN == ac)
1599                         break;
1600 
1601                 if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) && 
1602                                 ARGS_QWORD != ac && 0 == j && 
1603                                 DELIM_OPEN == mdoc_isdelim(p)) {
1604                         if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1605                                 return(0);
1606                         continue;
1607                 } else if (0 == j)
1608                        if ( ! mdoc_elem_alloc(mdoc, line, la, tok, arg))
1609                                return(0);
1610 
1611                 if (j == maxargs && ! flushed) {
1612                         if ( ! rew_elem(mdoc, tok))
1613                                 return(0);
1614                         flushed = 1;
1615                 }
1616 
1617                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1618 
1619                 if (MDOC_MAX != ntok) {
1620                         if ( ! flushed && ! rew_elem(mdoc, tok))
1621                                 return(0);
1622                         flushed = 1;
1623                         if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1624                                 return(0);
1625                         j++;
1626                         break;
1627                 }
1628 
1629                 if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1630                                 ARGS_QWORD != ac &&
1631                                 ! flushed &&
1632                                 DELIM_NONE != mdoc_isdelim(p)) {
1633                         if ( ! rew_elem(mdoc, tok))
1634                                 return(0);
1635                         flushed = 1;
1636                 }
1637 
1638                 if ( ! dword(mdoc, line, la, p, DELIM_MAX,
1639                     MDOC_JOIN & mdoc_macros[tok].flags))
1640                         return(0);
1641                 j++;
1642         }
1643 
1644         if (0 == j && ! mdoc_elem_alloc(mdoc, line, la, tok, arg))
1645                return(0);
1646 
1647         /* Close out in a consistent state. */
1648 
1649         if ( ! flushed && ! rew_elem(mdoc, tok))
1650                 return(0);
1651         if ( ! nl)
1652                 return(1);
1653         return(append_delims(mdoc, line, pos, buf));
1654 }
1655 
1656 
1657 static int
1658 in_line_eoln(MACRO_PROT_ARGS)
1659 {
1660         int              la;
1661         enum margserr    ac;
1662         enum margverr    av;
1663         struct mdoc_arg *arg;
1664         char            *p;
1665         enum mdoct       ntok;
1666 
1667         assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
1668 
1669         if (tok == MDOC_Pp)
1670                 rew_sub(MDOC_BLOCK, mdoc, MDOC_Nm, line, ppos);
1671 
1672         /* Parse macro arguments. */
1673 
1674         for (arg = NULL; ; ) {
1675                 la = *pos;
1676                 av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1677 
1678                 if (ARGV_WORD == av) {
1679                         *pos = la;
1680                         break;
1681                 }
1682                 if (ARGV_EOLN == av) 
1683                         break;
1684                 if (ARGV_ARG == av)
1685                         continue;
1686 
1687                 mdoc_argv_free(arg);
1688                 return(0);
1689         }
1690 
1691         /* Open element scope. */
1692 
1693         if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1694                 return(0);
1695 
1696         /* Parse argument terms. */
1697 
1698         for (;;) {
1699                 la = *pos;
1700                 ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1701 
1702                 if (ARGS_ERROR == ac)
1703                         return(0);
1704                 if (ARGS_EOLN == ac)
1705                         break;
1706 
1707                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1708 
1709                 if (MDOC_MAX == ntok) {
1710                         if ( ! dword(mdoc, line, la, p, DELIM_MAX,
1711                             MDOC_JOIN & mdoc_macros[tok].flags))
1712                                 return(0);
1713                         continue;
1714                 }
1715 
1716                 if ( ! rew_elem(mdoc, tok))
1717                         return(0);
1718                 return(mdoc_macro(mdoc, ntok, line, la, pos, buf));
1719         }
1720 
1721         /* Close out (no delimiters). */
1722 
1723         return(rew_elem(mdoc, tok));
1724 }
1725 
1726 
1727 /* ARGSUSED */
1728 static int
1729 ctx_synopsis(MACRO_PROT_ARGS)
1730 {
1731         int              nl;
1732 
1733         nl = MDOC_NEWLINE & mdoc->flags;
1734 
1735         /* If we're not in the SYNOPSIS, go straight to in-line. */
1736         if ( ! (MDOC_SYNOPSIS & mdoc->flags))
1737                 return(in_line(mdoc, tok, line, ppos, pos, buf));
1738 
1739         /* If we're a nested call, same place. */
1740         if ( ! nl)
1741                 return(in_line(mdoc, tok, line, ppos, pos, buf));
1742 
1743         /*
1744          * XXX: this will open a block scope; however, if later we end
1745          * up formatting the block scope, then child nodes will inherit
1746          * the formatting.  Be careful.
1747          */
1748         if (MDOC_Nm == tok)
1749                 return(blk_full(mdoc, tok, line, ppos, pos, buf));
1750         assert(MDOC_Vt == tok);
1751         return(blk_part_imp(mdoc, tok, line, ppos, pos, buf));
1752 }
1753 
1754 
1755 /* ARGSUSED */
1756 static int
1757 obsolete(MACRO_PROT_ARGS)
1758 {
1759 
1760         mdoc_pmsg(mdoc, line, ppos, MANDOCERR_MACROOBS);
1761         return(1);
1762 }
1763 
1764 
1765 /*
1766  * Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
1767  * They're unusual because they're basically free-form text until a
1768  * macro is encountered.
1769  */
1770 static int
1771 phrase(struct mdoc *mdoc, int line, int ppos, char *buf)
1772 {
1773         int              la, pos;
1774         enum margserr    ac;
1775         enum mdoct       ntok;
1776         char            *p;
1777 
1778         for (pos = ppos; ; ) {
1779                 la = pos;
1780 
1781                 ac = mdoc_zargs(mdoc, line, &pos, buf, &p);
1782 
1783                 if (ARGS_ERROR == ac)
1784                         return(0);
1785                 if (ARGS_EOLN == ac)
1786                         break;
1787 
1788                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1789 
1790                 if (MDOC_MAX == ntok) {
1791                         if ( ! dword(mdoc, line, la, p, DELIM_MAX, 1))
1792                                 return(0);
1793                         continue;
1794                 }
1795 
1796                 if ( ! mdoc_macro(mdoc, ntok, line, la, &pos, buf))
1797                         return(0);
1798                 return(append_delims(mdoc, line, &pos, buf));
1799         }
1800 
1801         return(1);
1802 }
1803 
1804 
1805 /* ARGSUSED */
1806 static int
1807 phrase_ta(MACRO_PROT_ARGS)
1808 {
1809         struct mdoc_node *n;
1810         int               la;
1811         enum mdoct        ntok;
1812         enum margserr     ac;
1813         char             *p;
1814 
1815         /* Make sure we are in a column list or ignore this macro. */
1816         n = mdoc->last;
1817         while (NULL != n && MDOC_Bl != n->tok)
1818                 n = n->parent;
1819         if (NULL == n || LIST_column != n->norm->Bl.type) {
1820                 mdoc_pmsg(mdoc, line, ppos, MANDOCERR_STRAYTA);
1821                 return(1);
1822         }
1823 
1824         /* Advance to the next column. */
1825         if ( ! rew_sub(MDOC_BODY, mdoc, MDOC_It, line, ppos))
1826                 return(0);
1827         if ( ! mdoc_body_alloc(mdoc, line, ppos, MDOC_It))
1828                 return(0);
1829 
1830         for (;;) {
1831                 la = *pos;
1832                 ac = mdoc_zargs(mdoc, line, pos, buf, &p);
1833 
1834                 if (ARGS_ERROR == ac)
1835                         return(0);
1836                 if (ARGS_EOLN == ac)
1837                         break;
1838 
1839                 ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1840 
1841                 if (MDOC_MAX == ntok) {
1842                         if ( ! dword(mdoc, line, la, p, DELIM_MAX,
1843                             MDOC_JOIN & mdoc_macros[tok].flags))
1844                                 return(0);
1845                         continue;
1846                 }
1847 
1848                 if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1849                         return(0);
1850                 return(append_delims(mdoc, line, pos, buf));
1851         }
1852 
1853         return(1);
1854 }