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/*
* Copyright (c) 2002-2012 Balabit
* Copyright (c) 1998-2012 Balázs Scheidler
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "filter/filter-expr.h"
#include "messages.h"
/****************************************************************
* Filter expression nodes
****************************************************************/
void
filter_expr_node_init_instance(FilterExprNode *self)
{
self->ref_cnt = 1;
}
/*
* In case the filter would modify the message the caller has to make sure
* that the message is writable. You can always archieve that with
* filter_expr_eval_root() below, but you have to be on a processing path to
* do that.
*/
gboolean
filter_expr_eval_with_context(FilterExprNode *self, LogMessage **msg, gint num_msg, LogTemplateEvalOptions *options)
{
gboolean res;
g_assert(num_msg > 0);
res = self->eval(self, msg, num_msg, options);
return res;
}
gboolean
filter_expr_eval(FilterExprNode *self, LogMessage *msg)
{
return filter_expr_eval_with_context(self, &msg, 1, &DEFAULT_TEMPLATE_EVAL_OPTIONS);
}
gboolean
filter_expr_eval_root_with_context(FilterExprNode *self, LogMessage **msg, gint num_msg,
LogTemplateEvalOptions *options,
const LogPathOptions *path_options)
{
g_assert(num_msg > 0);
if (self->modify)
log_msg_make_writable(&msg[num_msg - 1], path_options);
return filter_expr_eval_with_context(self, msg, num_msg, options);
}
gboolean
filter_expr_eval_root(FilterExprNode *self, LogMessage **msg, const LogPathOptions *path_options)
{
return filter_expr_eval_root_with_context(self, msg, 1, &DEFAULT_TEMPLATE_EVAL_OPTIONS, path_options);
}
static FilterExprNode *
filter_expr_ref(FilterExprNode *self)
{
self->ref_cnt++;
return self;
}
void
filter_expr_unref(FilterExprNode *self)
{
if (self && (--self->ref_cnt == 0))
{
if (self->free_fn)
self->free_fn(self);
g_free(self);
}
}
FilterExprNode *
filter_expr_clone(FilterExprNode *self)
{
if (!self)
return NULL;
if (!self->clone)
return filter_expr_ref(self);
FilterExprNode *cloned = self->clone(self);
cloned->comp = self->comp;
return cloned;
}
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