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>
55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
/*
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* Wireshark - Network traffic analyzer
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*
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* Copyright 2006 Gilbert Ramirez <gram@alumni.rice.edu>
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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 DFUNCTIONS_H
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#define DFUNCTIONS_H
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#include <glib.h>
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#include <ftypes/ftypes.h>
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#include "syntax-tree.h"
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/* The run-time logic of the dfilter function */
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typedef gboolean (*DFFuncType)(GList *arg1list, GList *arg2list, GList **retval);
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/* The semantic check for the dfilter function */
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typedef void (*DFSemCheckType)(dfwork_t *dfw, int param_num, stnode_t *st_node);
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/* If a function needs more args than this, increase
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* this macro and add more arg members to the dfvm_insn_t
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* struct in dfvm.h, and add some logic to dfw_append_function()
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* and dfvm_apply() */
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#define DFUNCTION_MAX_NARGS 2
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/* This is a "function definition" record, holding everything
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* we need to know about a function */
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typedef struct {
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const char *name;
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DFFuncType function;
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ftenum_t retval_ftype;
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guint min_nargs;
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guint max_nargs;
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DFSemCheckType semcheck_param_function;
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} df_func_def_t;
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/* Return the function definition record for a function of named "name" */
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df_func_def_t* df_func_lookup(char *name);
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#endif
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