forked from osmocom/wireshark
f3da72ef2f
return the pointer to the compiled filter through a pointer argument. Have it check whether the filter is a null filter and, if so, free up the filter and supply a filter pointer, rather than obliging its callers to check whether the filter actually has any code. (Well, they may want to check if the filter is null, so that they don't save a pointer to the filter text, e.g. so that the display filter displays as "none" rather than as a blank string in the summary box.) In the process, fix the check in "gtk/file_dlg.c" that tests whether the read filter compiled successfully. svn path=/trunk/; revision=812
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/* dfilter.h
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* Definitions for display filters
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*
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* $Id: dfilter.h,v 1.14 1999/10/12 05:00:47 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __DFILTER_H__
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#define __DFILTER_H__
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/* dfilter_error_msg is NULL if there was no error during dfilter_compile,
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* otherwise it points to a displayable error message. */
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extern gchar *dfilter_error_msg;
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extern gchar dfilter_error_msg_buf[1024];
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typedef struct {
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GNode *dftree;
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/* space for dfilter_nodes */
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GMemChunk *node_memchunk;
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/* list of byte arrays we allocate during parse. We can traverse this list
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* faster than the tree when we go back and free the byte arrays */
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GSList *list_of_byte_arrays;
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} dfilter;
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/* Initialization of the symbol table. Called once during program startup */
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void dfilter_init(void);
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/* Free the memory used by the symbol table. Called at program shutdown */
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void dfilter_cleanup(void);
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/* Allocate and initialize new dfilter struct. Returns pointer to new dfilter */
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dfilter* dfilter_new(void);
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/* Frees all memory used by dfilter, and frees dfilter itself */
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void dfilter_destroy(dfilter *df);
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/* Compile display filter text */
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int dfilter_compile(gchar* dfilter_text, dfilter** dfp);
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/* Apply compiled dfilter to a proto_tree */
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gboolean dfilter_apply(dfilter *df, proto_tree *ptree, const guint8* pd);
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#endif /* ! __DFILTER_H__ */
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