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Diff for /mandoc/man_macro.c between version 1.1 and 1.21

version 1.1, 2009/03/23 14:22:11 version 1.21, 2009/08/19 09:14:50
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 /* $Id$ */  /*      $Id$ */
 /*  /*
  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>   * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
  *   *
  * Permission to use, copy, modify, and distribute this software for any   * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the   * purpose with or without fee is hereby granted, provided that the above
  * above copyright notice and this permission notice appear in all   * copyright notice and this permission notice appear in all copies.
  * copies.  
  *   *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  * PERFORMANCE OF THIS SOFTWARE.  
  */   */
 #include <assert.h>  #include <assert.h>
 #include <ctype.h>  #include <ctype.h>
 #include <stdlib.h>  #include <stdlib.h>
 #include <stdio.h>  
 #include <string.h>  #include <string.h>
   
 #include "libman.h"  #include "libman.h"
   
 static  int       in_line_eoln(MACRO_PROT_ARGS);  #define REW_REWIND      (0)             /* See rew_scope(). */
   #define REW_NOHALT      (1)             /* See rew_scope(). */
   #define REW_HALT        (2)             /* See rew_scope(). */
   
   static  int              in_line_eoln(MACRO_PROT_ARGS);
   static  int              blk_imp(MACRO_PROT_ARGS);
   static  int              blk_close(MACRO_PROT_ARGS);
   
   static  int              rew_scope(enum man_type, struct man *, int);
   static  int              rew_dohalt(int, enum man_type,
                                   const struct man_node *);
   static  int              rew_block(int, enum man_type,
                                   const struct man_node *);
   
 const   struct man_macro __man_macros[MAN_MAX] = {  const   struct man_macro __man_macros[MAN_MAX] = {
         { in_line_eoln, NULL }, /* MAN___ */          { in_line_eoln, 0 }, /* br */
         { in_line_eoln, NULL }, /* MAN_TH */          { in_line_eoln, 0 }, /* TH */
         { in_line_eoln, NULL }, /* MAN_SH */          { blk_imp, 0 }, /* SH */
         { in_line_eoln, NULL }, /* MAN_SS */          { blk_imp, 0 }, /* SS */
         { in_line_eoln, NULL }, /* MAN_TP */          { blk_imp, MAN_SCOPED }, /* TP */
         { in_line_eoln, NULL }, /* MAN_LP */          { blk_imp, 0 }, /* LP */
         { in_line_eoln, NULL }, /* MAN_PP */          { blk_imp, 0 }, /* PP */
         { in_line_eoln, NULL }, /* MAN_P */          { blk_imp, 0 }, /* P */
         { in_line_eoln, NULL }, /* MAN_IP */          { blk_imp, 0 }, /* IP */
         { in_line_eoln, NULL }, /* MAN_HP */          { blk_imp, 0 }, /* HP */
         { in_line_eoln, NULL }, /* MAN_SM */          { in_line_eoln, MAN_SCOPED }, /* SM */
         { in_line_eoln, NULL }, /* MAN_SB */          { in_line_eoln, MAN_SCOPED }, /* SB */
         { in_line_eoln, NULL }, /* MAN_BI */          { in_line_eoln, 0 }, /* BI */
         { in_line_eoln, NULL }, /* MAN_IB */          { in_line_eoln, 0 }, /* IB */
         { in_line_eoln, NULL }, /* MAN_BR */          { in_line_eoln, 0 }, /* BR */
         { in_line_eoln, NULL }, /* MAN_RB */          { in_line_eoln, 0 }, /* RB */
         { in_line_eoln, NULL }, /* MAN_R */          { in_line_eoln, MAN_SCOPED }, /* R */
         { in_line_eoln, NULL }, /* MAN_B */          { in_line_eoln, MAN_SCOPED }, /* B */
         { in_line_eoln, NULL }, /* MAN_I */          { in_line_eoln, MAN_SCOPED }, /* I */
           { in_line_eoln, 0 }, /* IR */
           { in_line_eoln, 0 }, /* RI */
           { in_line_eoln, 0 }, /* na */
           { in_line_eoln, 0 }, /* i */
           { in_line_eoln, 0 }, /* sp */
           { in_line_eoln, 0 }, /* nf */
           { in_line_eoln, 0 }, /* fi */
           { in_line_eoln, 0 }, /* r */
           { blk_close, 0 }, /* RE */
           { blk_imp, 0 }, /* RS */
 };  };
   
 const   struct man_macro * const man_macros = __man_macros;  const   struct man_macro * const man_macros = __man_macros;
   
   
   int
   man_unscope(struct man *m, const struct man_node *n)
   {
   
           assert(n);
           m->next = MAN_NEXT_SIBLING;
   
           /* LINTED */
           while (m->last != n) {
                   if ( ! man_valid_post(m))
                           return(0);
                   if ( ! man_action_post(m))
                           return(0);
                   m->last = m->last->parent;
                   assert(m->last);
           }
   
           if ( ! man_valid_post(m))
                   return(0);
           return(man_action_post(m));
   }
   
   
   static int
   rew_block(int ntok, enum man_type type, const struct man_node *n)
   {
   
           if (MAN_BLOCK == type && ntok == n->parent->tok &&
                           MAN_BODY == n->parent->type)
                   return(REW_REWIND);
           return(ntok == n->tok ? REW_HALT : REW_NOHALT);
   }
   
   
 /*  /*
  * In-line macro that spans an entire line.  May be callable, but has no   * There are three scope levels: scoped to the root (all), scoped to the
  * subsequent parsed arguments.   * section (all less sections), and scoped to subsections (all less
    * sections and subsections).
  */   */
   static int
   rew_dohalt(int tok, enum man_type type, const struct man_node *n)
   {
           int              c;
   
           if (MAN_ROOT == n->type)
                   return(REW_HALT);
           assert(n->parent);
           if (MAN_ROOT == n->parent->type)
                   return(REW_REWIND);
           if (MAN_VALID & n->flags)
                   return(REW_NOHALT);
   
           /* Rewind to ourselves, first. */
           if (type == n->type && tok == n->tok)
                   return(REW_REWIND);
   
           switch (tok) {
           case (MAN_SH):
                   break;
           case (MAN_SS):
                   /* Rewind to a section, if a block. */
                   if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
                           return(c);
                   break;
           case (MAN_RS):
                   /* Rewind to a subsection, if a block. */
                   if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
                           return(c);
                   /* Rewind to a section, if a block. */
                   if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
                           return(c);
                   break;
           default:
                   /* Rewind to an offsetter, if a block. */
                   if (REW_NOHALT != (c = rew_block(MAN_RS, type, n)))
                           return(c);
                   /* Rewind to a subsection, if a block. */
                   if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
                           return(c);
                   /* Rewind to a section, if a block. */
                   if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
                           return(c);
                   break;
           }
   
           return(REW_NOHALT);
   }
   
   
   /*
    * Rewinding entails ascending the parse tree until a coherent point,
    * for example, the `SH' macro will close out any intervening `SS'
    * scopes.  When a scope is closed, it must be validated and actioned.
    */
 static int  static int
 in_line_eoln(MACRO_PROT_ARGS)  rew_scope(enum man_type type, struct man *m, int tok)
 {  {
 #if 0          struct man_node *n;
         int               c, w, la;          int              c;
         char             *p;  
   
         if ( ! man_elem_alloc(man, line, ppos, tok, arg))          /* LINTED */
           for (n = m->last; n; n = n->parent) {
                   /*
                    * Whether we should stop immediately (REW_HALT), stop
                    * and rewind until this point (REW_REWIND), or keep
                    * rewinding (REW_NOHALT).
                    */
                   c = rew_dohalt(tok, type, n);
                   if (REW_HALT == c)
                           return(1);
                   if (REW_REWIND == c)
                           break;
           }
   
           /* Rewind until the current point. */
   
           assert(n);
           return(man_unscope(m, n));
   }
   
   
   /* ARGSUSED */
   int
   blk_close(MACRO_PROT_ARGS)
   {
           int                      ntok;
           const struct man_node   *nn;
   
           switch (tok) {
           case (MAN_RE):
                   ntok = MAN_RS;
                   break;
           default:
                   abort();
                   /* NOTREACHED */
           }
   
           for (nn = m->last->parent; nn; nn = nn->parent)
                   if (ntok == nn->tok)
                           break;
   
           if (NULL == nn)
                   if ( ! man_pwarn(m, line, ppos, WNOSCOPE))
                           return(0);
   
           if ( ! rew_scope(MAN_BODY, m, ntok))
                 return(0);                  return(0);
         man->next = MDOC_NEXT_SIBLING;          if ( ! rew_scope(MAN_BLOCK, m, ntok))
                   return(0);
           m->next = MAN_NEXT_SIBLING;
           return(1);
   }
   
   
   /*
    * Parse an implicit-block macro.  These contain a MAN_HEAD and a
    * MAN_BODY contained within a MAN_BLOCK.  Rules for closing out other
    * scopes, such as `SH' closing out an `SS', are defined in the rew
    * routines.
    */
   int
   blk_imp(MACRO_PROT_ARGS)
   {
           int              w, la;
           char            *p;
   
           /* Close out prior scopes. */
   
           if ( ! rew_scope(MAN_BODY, m, tok))
                   return(0);
           if ( ! rew_scope(MAN_BLOCK, m, tok))
                   return(0);
   
           /* Allocate new block & head scope. */
   
           if ( ! man_block_alloc(m, line, ppos, tok))
                   return(0);
           if ( ! man_head_alloc(m, line, ppos, tok))
                   return(0);
   
           /* Add line arguments. */
   
         for (;;) {          for (;;) {
                 la = *pos;                  la = *pos;
                 w = man_args(man, line, pos, buf, tok, &p);                  w = man_args(m, line, pos, buf, &p);
   
                 if (ARGS_ERROR == w)                  if (-1 == w)
                         return(0);                          return(0);
                 if (ARGS_EOLN == w)                  if (0 == w)
                         break;                          break;
   
                 c = ARGS_QWORD == w ? MAN_MAX :                  if ( ! man_word_alloc(m, line, la, p))
                         lookup(man, line, la, tok, p);                          return(0);
           }
   
                 if (MDOC_MAX != c && -1 != c) {          /* Close out head and open body (unless MAN_SCOPE). */
                         if ( ! rew_elem(mdoc, tok))  
                                 return(0);          if (MAN_SCOPED & man_macros[tok].flags) {
                         return(mdoc_macro(mdoc, c, line, la, pos, buf));                  m->flags |= MAN_BLINE;
                 } else if (-1 == c)                  return(1);
           } else if ( ! rew_scope(MAN_HEAD, m, tok))
                   return(0);
   
           return(man_body_alloc(m, line, ppos, tok));
   }
   
   
   int
   in_line_eoln(MACRO_PROT_ARGS)
   {
           int              w, la;
           char            *p;
           struct man_node *n;
   
           if ( ! man_elem_alloc(m, line, ppos, tok))
                   return(0);
   
           n = m->last;
   
           for (;;) {
                   la = *pos;
                   w = man_args(m, line, pos, buf, &p);
   
                   if (-1 == w)
                         return(0);                          return(0);
                   if (0 == w)
                           break;
   
                 if ( ! mdoc_word_alloc(mdoc, line, la, p))                  if ( ! man_word_alloc(m, line, la, p))
                         return(0);                          return(0);
         }          }
   
         return(rew_elem(mdoc, tok));          if (n == m->last && (MAN_SCOPED & man_macros[tok].flags)) {
 #endif                  m->flags |= MAN_ELINE;
                   return(1);
           }
   
           /*
            * Note that when TH is pruned, we'll be back at the root, so
            * make sure that we don't clobber as its sibling.
            */
   
           /* FIXME: clean this to use man_unscope(). */
   
           for ( ; m->last; m->last = m->last->parent) {
                   if (m->last == n)
                           break;
                   if (m->last->type == MAN_ROOT)
                           break;
                   if ( ! man_valid_post(m))
                           return(0);
                   if ( ! man_action_post(m))
                           return(0);
           }
   
           assert(m->last);
   
           /*
            * Same here regarding whether we're back at the root.
            */
   
           if (m->last->type != MAN_ROOT && ! man_valid_post(m))
                   return(0);
           if (m->last->type != MAN_ROOT && ! man_action_post(m))
                   return(0);
           if (m->last->type != MAN_ROOT)
                   m->next = MAN_NEXT_SIBLING;
   
         return(1);          return(1);
   }
   
   
   int
   man_macroend(struct man *m)
   {
   
           return(man_unscope(m, m->first));
 }  }
   
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