epan/filter_expressions.c

   1 /* filter_expressions.c
   2  * Submitted by Edwin Groothuis <wireshark@mavetju.org>
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 1998 Gerald Combs
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <glib.h>
  28
  29 #include <epan/prefs.h>
  30
  31 #include "epan/filter_expressions.h"
  32
  33 static struct filter_expression *_filter_expression_head = NULL;
  34 struct filter_expression **pfilter_expression_head = &_filter_expression_head;
  35
  36 /*
  37  * Create a new filter_expression and add it to the end of the list
  38  * of filter_expressions.
  39  */
  40 struct filter_expression *
  41 filter_expression_new(const gchar *label, const gchar *expr,
  42                       const gboolean enabled)
  43 {
  44         struct filter_expression *expression;
  45         struct filter_expression *prev;
  46
  47     expression = (struct filter_expression *)g_malloc0(sizeof(struct filter_expression));
  48         expression->label = g_strdup(label);
  49         expression->expression = g_strdup(expr);
  50         expression->enabled = enabled;
  51
  52         /* Add it at the end so the button order is always the same*/
  53         if (*pfilter_expression_head == NULL) {
  54                 _filter_expression_head = expression;
  55         } else {
  56                 prev = *pfilter_expression_head;
  57                 while (prev->next != NULL)
  58                         prev = prev->next;
  59                 prev->next = expression;
  60                 expression->index = prev->index + 1;
  61         }
  62
  63         return(expression);
  64 }
  65
  66 void
  67 filter_expression_init(gboolean enable_prefs)
  68 {
  69         if (enable_prefs)
  70                 prefs.filter_expressions = pfilter_expression_head;
  71 }
  72
  73 void
  74 filter_expression_free(struct filter_expression *list_head)
  75 {
  76     if (list_head == NULL)
  77         return;
  78     filter_expression_free(list_head->next);
  79     g_free(list_head->label);
  80     g_free(list_head->expression);
  81 }
  82
  83
  84
  85 /*
  86  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
  87  *
  88  * Local variables:
  89  * c-basic-offset: 8
  90  * tab-width: 8
  91  * indent-tabs-mode: t
  92  * End:
  93  *
  94  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
  95  * :indentSize=8:tabSize=8:noTabs=false:
  96  */