forked from osmocom/wireshark
cfcbb28671
Have dfilter_compile() take an additional gchar ** argument, pointing to a gchar * item that, on error, gets set to point to a g_malloc()ed error string. That removes one bit of global state from the display filter parser, and doesn't impose a fixed limit on the error message strings. Have fvalue_from_string() and fvalue_from_unparsed() take a gchar ** argument, pointer to a gchar * item, rather than an error-reporting function, and set the gchar * item to point to a g_malloc()ed error string on an error. Allow either gchar ** argument to be null; if the argument is null, no error message is allocated or provided. Change-Id: Ibd36b8aaa9bf4234aa6efa1e7fb95f7037493b4c Reviewed-on: https://code.wireshark.org/review/6608 Reviewed-by: Guy Harris <guy@alum.mit.edu>
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2001 Gerald Combs
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef DFILTER_H
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#define DFILTER_H
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#include <glib.h>
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#include "ws_symbol_export.h"
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/* Passed back to user */
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typedef struct epan_dfilter dfilter_t;
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#include <epan/proto.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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struct epan_dissect;
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/* Module-level initialization */
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void
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dfilter_init(void);
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/* Module-level cleanup */
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void
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dfilter_cleanup(void);
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/* Compiles a string to a dfilter_t.
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* On success, sets the dfilter* pointed to by dfp
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* to either a NULL pointer (if the filter is a null
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* filter, as generated by an all-blank string) or to
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* a pointer to the newly-allocated dfilter_t
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* structure.
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*
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* On failure, *err_msg is set to point to the error
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* message. This error message is allocated with
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* g_malloc(), and must be freed with g_free().
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* The dfilter* will be set to NULL after a failure.
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*
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* Returns TRUE on success, FALSE on failure.
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*/
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WS_DLL_PUBLIC
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gboolean
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dfilter_compile(const gchar *text, dfilter_t **dfp, gchar **err_msg);
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/* Frees all memory used by dfilter, and frees
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* the dfilter itself. */
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WS_DLL_PUBLIC
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void
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dfilter_free(dfilter_t *df);
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/* Apply compiled dfilter */
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WS_DLL_PUBLIC
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gboolean
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dfilter_apply_edt(dfilter_t *df, struct epan_dissect *edt);
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/* Apply compiled dfilter */
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gboolean
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dfilter_apply(dfilter_t *df, proto_tree *tree);
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/* Prime a proto_tree using the fields/protocols used in a dfilter. */
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void
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dfilter_prime_proto_tree(const dfilter_t *df, proto_tree *tree);
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WS_DLL_PUBLIC
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GPtrArray *
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dfilter_deprecated_tokens(dfilter_t *df);
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/* Print bytecode of dfilter to stdout */
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WS_DLL_PUBLIC
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void
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dfilter_dump(dfilter_t *df);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* DFILTER_H */
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