epan/filter_expressions.c

   1 /* filter_expressions.c
   2  * Submitted by Edwin Groothuis <wireshark@mavetju.org>
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include "config.h"
  26
  27 #include <stdlib.h>
  28 #include <glib.h>
  29
  30 #include <epan/prefs.h>
  31
  32 #include "epan/filter_expressions.h"
  33
  34 static struct filter_expression *_filter_expression_head = NULL;
  35 struct filter_expression **pfilter_expression_head = &_filter_expression_head;
  36
  37 /*
  38  * Create a new filter_expression and add it to the end of the list
  39  * of filter_expressions.
  40  */
  41 struct filter_expression *
  42 filter_expression_new(const gchar *label, const gchar *expr,
  43     const gboolean enabled)
  44 {
  45         struct filter_expression *expression;
  46         struct filter_expression *prev;
  47
  48         expression = (struct filter_expression *)g_malloc(sizeof(struct filter_expression));
  49         memset(expression, '\0', sizeof(struct filter_expression));
  50         expression->button = NULL;
  51         expression->label = g_strdup(label);
  52         expression->expression = g_strdup(expr);
  53         expression->enabled = enabled;
  54         expression->deleted = FALSE;
  55         expression->index = 0;
  56
  57         expression->next = NULL;
  58
  59         /* Add it at the end so the button order is always the same*/
  60         if (*pfilter_expression_head == NULL) {
  61                 _filter_expression_head = expression;
  62         } else {
  63                 prev = *pfilter_expression_head;
  64                 while (prev->next != NULL)
  65                         prev = prev->next;
  66                 prev->next = expression;
  67                 expression->index = prev->index + 1;
  68         }
  69
  70         return(expression);
  71 }
  72
  73 void
  74 filter_expression_init(gboolean enable_prefs)
  75 {
  76         if (enable_prefs)
  77                 prefs.filter_expressions = pfilter_expression_head;
  78 }