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/* dfilter.h
* Definitions for display filters
*
* $Id: dfilter.h,v 1.14 1999/10/12 05:00:47 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
* Copyright 1998 Gerald Combs
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __DFILTER_H__
#define __DFILTER_H__
/* dfilter_error_msg is NULL if there was no error during dfilter_compile,
* otherwise it points to a displayable error message. */
extern gchar *dfilter_error_msg;
extern gchar dfilter_error_msg_buf[1024];
typedef struct {
GNode *dftree;
/* space for dfilter_nodes */
GMemChunk *node_memchunk;
/* list of byte arrays we allocate during parse. We can traverse this list
* faster than the tree when we go back and free the byte arrays */
GSList *list_of_byte_arrays;
} dfilter;
/* Initialization of the symbol table. Called once during program startup */
void dfilter_init(void);
/* Free the memory used by the symbol table. Called at program shutdown */
void dfilter_cleanup(void);
/* Allocate and initialize new dfilter struct. Returns pointer to new dfilter */
dfilter* dfilter_new(void);
/* Frees all memory used by dfilter, and frees dfilter itself */
void dfilter_destroy(dfilter *df);
/* Compile display filter text */
int dfilter_compile(gchar* dfilter_text, dfilter** dfp);
/* Apply compiled dfilter to a proto_tree */
gboolean dfilter_apply(dfilter *df, proto_tree *ptree, const guint8* pd);
#endif /* ! __DFILTER_H__ */
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