No need to cast NULL when assigning it to a variable;

[mandoc.git] / man_macro.c

diff --git a/man_macro.c b/man_macro.c
index c43f3f6b8477258de34e0682cde0ed4946cda5ff..7fd17c53481baae9ece3328f99e31087fecaeed8 100644 (file)
--- a/man_macro.c
+++ b/man_macro.c
@@ -1,295 +1,413 @@
-/*     $Id: man_macro.c,v 1.19 2009/08/13 11:45:29 kristaps Exp $ */
+/*     $Id: man_macro.c,v 1.115 2017/01/10 13:47:00 schwarze Exp $ */

 /*
 /*

- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2012, 2013, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>

  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *

- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES

  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR

  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

+#include "config.h"
+
+#include <sys/types.h>
+

 #include <assert.h>
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include <assert.h>
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 

+#include "mandoc.h"
+#include "roff.h"
+#include "man.h"
+#include "libmandoc.h"
+#include "roff_int.h"

 #include "libman.h"
 
 #include "libman.h"
 

-#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              rew_scope(enum man_type, struct man *, int);
-static int              rew_dohalt(int, enum man_type, 
-                               const struct man_node *);
+static void             blk_close(MACRO_PROT_ARGS);
+static void             blk_exp(MACRO_PROT_ARGS);
+static void             blk_imp(MACRO_PROT_ARGS);
+static void             in_line_eoln(MACRO_PROT_ARGS);
+static int              man_args(struct roff_man *, int,
+                               int *, char *, char **);
+static void             rew_scope(struct roff_man *, int);

 
 const  struct man_macro __man_macros[MAN_MAX] = {
 
 const  struct man_macro __man_macros[MAN_MAX] = {

-       { in_line_eoln, 0 }, /* br */
-       { in_line_eoln, 0 }, /* TH */
-       { blk_imp, 0 }, /* SH */
-       { blk_imp, 0 }, /* SS */
-       { blk_imp, MAN_SCOPED }, /* TP */
-       { blk_imp, 0 }, /* LP */
-       { blk_imp, 0 }, /* PP */
-       { blk_imp, 0 }, /* P */
-       { blk_imp, 0 }, /* IP */
-       { blk_imp, 0 }, /* HP */
-       { in_line_eoln, MAN_SCOPED }, /* SM */
-       { in_line_eoln, MAN_SCOPED }, /* SB */
+       { in_line_eoln, MAN_NSCOPED }, /* br */
+       { in_line_eoln, MAN_BSCOPE }, /* TH */
+       { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* SH */
+       { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* SS */
+       { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* TP */
+       { blk_imp, MAN_BSCOPE }, /* LP */
+       { blk_imp, MAN_BSCOPE }, /* PP */
+       { blk_imp, MAN_BSCOPE }, /* P */
+       { blk_imp, MAN_BSCOPE }, /* IP */
+       { blk_imp, MAN_BSCOPE }, /* HP */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* SM */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* SB */

        { in_line_eoln, 0 }, /* BI */
        { in_line_eoln, 0 }, /* IB */
        { in_line_eoln, 0 }, /* BR */
        { in_line_eoln, 0 }, /* RB */
        { in_line_eoln, 0 }, /* BI */
        { in_line_eoln, 0 }, /* IB */
        { in_line_eoln, 0 }, /* BR */
        { in_line_eoln, 0 }, /* RB */

-       { in_line_eoln, MAN_SCOPED }, /* R */
-       { in_line_eoln, MAN_SCOPED }, /* B */
-       { in_line_eoln, MAN_SCOPED }, /* I */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* R */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* B */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* I */

        { in_line_eoln, 0 }, /* IR */
        { in_line_eoln, 0 }, /* RI */
        { 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 */
+       { in_line_eoln, MAN_NSCOPED }, /* sp */
+       { in_line_eoln, MAN_NSCOPED }, /* nf */
+       { in_line_eoln, MAN_NSCOPED }, /* fi */
+       { blk_close, MAN_BSCOPE }, /* RE */
+       { blk_exp, MAN_BSCOPE }, /* RS */
+       { in_line_eoln, 0 }, /* DT */
+       { in_line_eoln, 0 }, /* UC */
+       { in_line_eoln, MAN_NSCOPED }, /* PD */
+       { in_line_eoln, 0 }, /* AT */
+       { in_line_eoln, 0 }, /* in */
+       { in_line_eoln, 0 }, /* ft */
+       { in_line_eoln, 0 }, /* OP */
+       { in_line_eoln, MAN_BSCOPE }, /* EX */
+       { in_line_eoln, MAN_BSCOPE }, /* EE */
+       { blk_exp, MAN_BSCOPE }, /* UR */
+       { blk_close, MAN_BSCOPE }, /* UE */
+       { in_line_eoln, 0 }, /* ll */

 };
 
 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)
+void
+man_unscope(struct roff_man *man, const struct roff_node *to)

 {
 {

+       struct roff_node *n;
+
+       to = to->parent;
+       n = man->last;
+       while (n != to) {
+
+               /* Reached the end of the document? */
+
+               if (to == NULL && ! (n->flags & NODE_VALID)) {
+                       if (man->flags & (MAN_BLINE | MAN_ELINE) &&
+                           man_macros[n->tok].flags & MAN_SCOPED) {
+                               mandoc_vmsg(MANDOCERR_BLK_LINE,
+                                   man->parse, n->line, n->pos,
+                                   "EOF breaks %s",
+                                   man_macronames[n->tok]);
+                               if (man->flags & MAN_ELINE)
+                                       man->flags &= ~MAN_ELINE;
+                               else {
+                                       assert(n->type == ROFFT_HEAD);
+                                       n = n->parent;
+                                       man->flags &= ~MAN_BLINE;
+                               }
+                               man->last = n;
+                               n = n->parent;
+                               roff_node_delete(man, man->last);
+                               continue;
+                       }
+                       if (n->type == ROFFT_BLOCK &&
+                           man_macros[n->tok].fp == blk_exp)
+                               mandoc_msg(MANDOCERR_BLK_NOEND,
+                                   man->parse, n->line, n->pos,
+                                   man_macronames[n->tok]);
+               }
+
+               /*
+                * We might delete the man->last node
+                * in the post-validation phase.
+                * Save a pointer to the parent such that
+                * we know where to continue the iteration.
+                */

 
 

-       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);
+               man->last = n;
+               n = n->parent;
+               man->last->flags |= NODE_VALID;

        }
 
        }
 

-       if ( ! man_valid_post(m))
-               return(0);
-       return(man_action_post(m));
-}
+       /*
+        * If we ended up at the parent of the node we were
+        * supposed to rewind to, that means the target node
+        * got deleted, so add the next node we parse as a child
+        * of the parent instead of as a sibling of the target.
+        */

 
 

+       man->next = (man->last == to) ?
+           ROFF_NEXT_CHILD : ROFF_NEXT_SIBLING;
+}

 
 /*
 
 /*

- * There are three scope levels: scoped to the root (all), scoped to the
- * section (all less sections), and scoped to subsections (all less
- * sections and subsections).
+ * 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 
-rew_dohalt(int tok, enum man_type type, const struct man_node *n)
+static void
+rew_scope(struct roff_man *man, int tok)

 {
 {

+       struct roff_node *n;

 
 

-       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);
+       /* Preserve empty paragraphs before RS. */

 
 

-       switch (tok) {
-       case (MAN_SH):
-               /* Break at root. */
-               if (type == n->type && tok == n->tok)
-                       return(REW_REWIND);
-               break;
-       case (MAN_SS):
-               /* Break at section. */
-               if (type == n->type && tok == n->tok)
-                       return(REW_REWIND);
-               if (MAN_BODY == n->type && MAN_SH == n->tok)
-                       return(REW_HALT);
-               break;
-       default:
-               /* Break at subsection. */
-               if (type == n->type && tok == n->tok)
-                       return(REW_REWIND);
-               if (MAN_BODY == n->type && MAN_SS == n->tok)
-                       return(REW_HALT);
-               if (MAN_BODY == n->type && MAN_SH == n->tok)
-                       return(REW_HALT);
-               break;
-       }
+       n = man->last;
+       if (tok == MAN_RS && n->child == NULL &&
+           (n->tok == MAN_P || n->tok == MAN_PP || n->tok == MAN_LP))
+               return;

 
 

-       return(REW_NOHALT);
+       for (;;) {
+               if (n->type == ROFFT_ROOT)
+                       return;
+               if (n->flags & NODE_VALID) {
+                       n = n->parent;
+                       continue;
+               }
+               if (n->type != ROFFT_BLOCK) {
+                       if (n->parent->type == ROFFT_ROOT) {
+                               man_unscope(man, n);
+                               return;
+                       } else {
+                               n = n->parent;
+                               continue;
+                       }
+               }
+               if (tok != MAN_SH && (n->tok == MAN_SH ||
+                   (tok != MAN_SS && (n->tok == MAN_SS ||
+                    man_macros[n->tok].fp == blk_exp))))
+                       return;
+               man_unscope(man, n);
+               n = man->last;
+       }

 }
 
 
 /*
 }
 
 
 /*

- * 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.
+ * Close out a generic explicit macro.

  */
  */

-static int
-rew_scope(enum man_type type, struct man *m, int tok)
+void
+blk_close(MACRO_PROT_ARGS)

 {
 {

-       struct man_node *n;
-       int              c;
-
-       /* 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)
+       int                      ntok;
+       const struct roff_node  *nn;
+       char                    *p;
+       int                      nrew, target;
+
+       nrew = 1;
+       switch (tok) {
+       case MAN_RE:
+               ntok = MAN_RS;
+               if ( ! man_args(man, line, pos, buf, &p))

                        break;
                        break;

+               for (nn = man->last->parent; nn; nn = nn->parent)
+                       if (nn->tok == ntok && nn->type == ROFFT_BLOCK)
+                               nrew++;
+               target = strtol(p, &p, 10);
+               if (*p != '\0')
+                       mandoc_vmsg(MANDOCERR_ARG_EXCESS, man->parse,
+                           line, p - buf, "RE ... %s", p);
+               if (target == 0)
+                       target = 1;
+               nrew -= target;
+               if (nrew < 1) {
+                       mandoc_vmsg(MANDOCERR_RE_NOTOPEN, man->parse,
+                           line, ppos, "RE %d", target);
+                       return;
+               }
+               break;
+       case MAN_UE:
+               ntok = MAN_UR;
+               break;
+       default:
+               abort();

        }
 
        }
 

-       /* Rewind until the current point. */
+       for (nn = man->last->parent; nn; nn = nn->parent)
+               if (nn->tok == ntok && nn->type == ROFFT_BLOCK && ! --nrew)
+                       break;

 
 

-       assert(n);
-       return(man_unscope(m, n));
+       if (nn == NULL) {
+               mandoc_msg(MANDOCERR_BLK_NOTOPEN, man->parse,
+                   line, ppos, man_macronames[tok]);
+               rew_scope(man, MAN_PP);
+       } else {
+               line = man->last->line;
+               ppos = man->last->pos;
+               ntok = man->last->tok;
+               man_unscope(man, nn);
+
+               /* Move a trailing paragraph behind the block. */
+
+               if (ntok == MAN_LP || ntok == MAN_PP || ntok == MAN_P) {
+                       *pos = strlen(buf);
+                       blk_imp(man, ntok, line, ppos, pos, buf);
+               }
+       }

 }
 
 }
 

+void
+blk_exp(MACRO_PROT_ARGS)
+{
+       struct roff_node *head;
+       char            *p;
+       int              la;
+
+       rew_scope(man, tok);
+       roff_block_alloc(man, line, ppos, tok);
+       head = roff_head_alloc(man, line, ppos, tok);
+
+       la = *pos;
+       if (man_args(man, line, pos, buf, &p))
+               roff_word_alloc(man, line, la, p);
+
+       if (buf[*pos] != '\0')
+               mandoc_vmsg(MANDOCERR_ARG_EXCESS,
+                   man->parse, line, *pos, "%s ... %s",
+                   man_macronames[tok], buf + *pos);
+
+       man_unscope(man, head);
+       roff_body_alloc(man, line, ppos, tok);
+}

 
 /*
 
 /*

- * Parse an implicit-block macro.  These contain a MAN_HEAD and a
- * MAN_BODY contained within a MAN_BLOCK.  Rules for closing out other
+ * Parse an implicit-block macro.  These contain a ROFFT_HEAD and a
+ * ROFFT_BODY contained within a ROFFT_BLOCK.  Rules for closing out other

  * scopes, such as `SH' closing out an `SS', are defined in the rew
  * routines.
  */
  * scopes, such as `SH' closing out an `SS', are defined in the rew
  * routines.
  */

-int
+void

 blk_imp(MACRO_PROT_ARGS)
 {
 blk_imp(MACRO_PROT_ARGS)
 {

-       int              w, la;
+       int              la;

        char            *p;
        char            *p;

+       struct roff_node *n;

 
 

-       /* 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);
+       rew_scope(man, tok);
+       n = roff_block_alloc(man, line, ppos, tok);
+       if (n->tok == MAN_SH || n->tok == MAN_SS)
+               man->flags &= ~MAN_LITERAL;
+       n = roff_head_alloc(man, line, ppos, tok);

 
        /* Add line arguments. */
 
        for (;;) {
                la = *pos;
 
        /* Add line arguments. */
 
        for (;;) {
                la = *pos;

-               w = man_args(m, line, pos, buf, &p);
-
-               if (-1 == w)
-                       return(0);
-               if (0 == w)
+               if ( ! man_args(man, line, pos, buf, &p))

                        break;
                        break;

-
-               if ( ! man_word_alloc(m, line, la, p))
-                       return(0);
-               m->next = MAN_NEXT_SIBLING;
+               roff_word_alloc(man, line, la, p);

        }
 
        }
 

-       /* Close out head and open body (unless MAN_SCOPE). */
+       /*
+        * For macros having optional next-line scope,
+        * keep the head open if there were no arguments.
+        * For `TP', always keep the head open.
+        */
+
+       if (man_macros[tok].flags & MAN_SCOPED &&
+           (tok == MAN_TP || n == man->last)) {
+               man->flags |= MAN_BLINE;
+               return;
+       }

 
 

-       if (MAN_SCOPED & man_macros[tok].flags) {
-               m->flags |= MAN_BLINE;
-               return(1);
-       } else if ( ! rew_scope(MAN_HEAD, m, tok))
-               return(0);
+       /* Close out the head and open the body. */

 
 

-       return(man_body_alloc(m, line, ppos, tok));
+       man_unscope(man, n);
+       roff_body_alloc(man, line, ppos, tok);

 }
 
 }
 

-
-int
+void

 in_line_eoln(MACRO_PROT_ARGS)
 {
 in_line_eoln(MACRO_PROT_ARGS)
 {

-       int              w, la;
+       int              la;

        char            *p;
        char            *p;

-       struct man_node *n;
-
-       if ( ! man_elem_alloc(m, line, ppos, tok))
-               return(0);
+       struct roff_node *n;

 
 

-       n = m->last;
-       m->next = MAN_NEXT_CHILD;
+       roff_elem_alloc(man, line, ppos, tok);
+       n = man->last;

 
        for (;;) {
 
        for (;;) {

+               if (buf[*pos] != '\0' && (tok == MAN_br ||
+                   tok == MAN_fi || tok == MAN_nf)) {
+                       mandoc_vmsg(MANDOCERR_ARG_SKIP,
+                           man->parse, line, *pos, "%s %s",
+                           man_macronames[tok], buf + *pos);
+                       break;
+               }
+               if (buf[*pos] != '\0' && man->last != n &&
+                   (tok == MAN_PD || tok == MAN_ft || tok == MAN_sp)) {
+                       mandoc_vmsg(MANDOCERR_ARG_EXCESS,
+                           man->parse, line, *pos, "%s ... %s",
+                           man_macronames[tok], buf + *pos);
+                       break;
+               }

                la = *pos;
                la = *pos;

-               w = man_args(m, line, pos, buf, &p);
-
-               if (-1 == w)
-                       return(0);
-               if (0 == w)
+               if ( ! man_args(man, line, pos, buf, &p))

                        break;
                        break;

-
-               if ( ! man_word_alloc(m, line, la, p))
-                       return(0);
-               m->next = MAN_NEXT_SIBLING;
+               if (man_macros[tok].flags & MAN_JOIN &&
+                   man->last->type == ROFFT_TEXT)
+                       roff_word_append(man, p);
+               else
+                       roff_word_alloc(man, line, la, p);

        }
 
        }
 

-       if (n == m->last && (MAN_SCOPED & man_macros[tok].flags)) {
-               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.
+        * Append NODE_EOS in case the last snipped argument
+        * ends with a dot, e.g. `.IR syslog (3).'

         */
 
         */
 

-       /* 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);
+       if (n != man->last &&
+           mandoc_eos(man->last->string, strlen(man->last->string)))
+               man->last->flags |= NODE_EOS;

 
        /*
 
        /*

-        * Same here regarding whether we're back at the root. 
+        * If no arguments are specified and this is MAN_SCOPED (i.e.,
+        * next-line scoped), then set our mode to indicate that we're
+        * waiting for terms to load into our context.

         */
 
         */
 

-       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;
+       if (n == man->last && man_macros[tok].flags & MAN_SCOPED) {
+               assert( ! (man_macros[tok].flags & MAN_NSCOPED));
+               man->flags |= MAN_ELINE;
+               return;
+       }
+
+       assert(man->last->type != ROFFT_ROOT);
+       man->next = ROFF_NEXT_SIBLING;

 
 

-       return(1);
-}
+       /* Rewind our element scope. */

 
 

+       for ( ; man->last; man->last = man->last->parent) {
+               man_state(man, man->last);
+               if (man->last == n)
+                       break;
+       }
+}

 
 

-int
-man_macroend(struct man *m)
+void
+man_endparse(struct roff_man *man)

 {
 
 {
 

-       return(man_unscope(m, m->first));
+       man_unscope(man, man->first);
+       man->flags &= ~MAN_LITERAL;

 }
 
 }
 

+static int
+man_args(struct roff_man *man, int line, int *pos, char *buf, char **v)
+{
+       char     *start;
+
+       assert(*pos);
+       *v = start = buf + *pos;
+       assert(' ' != *start);
+
+       if ('\0' == *start)
+               return 0;
+
+       *v = mandoc_getarg(man->parse, v, line, pos);
+       return 1;
+}