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/*
* Copyright (c) 2023 Balazs Scheidler <balazs.scheidler@axoflow.com>
*
* 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 "filterx/filterx-expr.h"
#include "cfg-source.h"
#include "messages.h"
void
filterx_expr_set_location(FilterXExpr *self, CfgLexer *lexer, CFG_LTYPE *lloc)
{
self->lloc = *lloc;
if (debug_flag)
{
GString *res = g_string_sized_new(0);
cfg_source_extract_source_text(lexer, lloc, res);
self->expr_text = g_string_free(res, FALSE);
}
}
EVTTAG *
filterx_expr_format_location_tag(FilterXExpr *self)
{
return evt_tag_printf("expr", "%s:%d:%d| %s",
self->lloc.name, self->lloc.first_line, self->lloc.first_column,
self->expr_text ? : "n/a");
}
void
filterx_expr_free_method(FilterXExpr *self)
{
g_free(self->expr_text);
}
void
filterx_expr_init_instance(FilterXExpr *self)
{
self->ref_cnt = 1;
self->free_fn = filterx_expr_free_method;
}
FilterXExpr *
filterx_expr_new(void)
{
FilterXExpr *self = g_new0(FilterXExpr, 1);
filterx_expr_init_instance(self);
return self;
}
FilterXExpr *
filterx_expr_ref(FilterXExpr *self)
{
if (!self)
return NULL;
self->ref_cnt++;
return self;
}
void
filterx_expr_unref(FilterXExpr *self)
{
if (!self)
return;
if (--self->ref_cnt == 0)
{
self->free_fn(self);
g_free(self);
}
}
void
filterx_unary_op_free_method(FilterXExpr *s)
{
FilterXUnaryOp *self = (FilterXUnaryOp *) s;
filterx_expr_unref(self->operand);
filterx_expr_free_method(s);
}
void
filterx_unary_op_init_instance(FilterXUnaryOp *self, FilterXExpr *operand)
{
filterx_expr_init_instance(&self->super);
self->super.free_fn = filterx_unary_op_free_method;
self->operand = operand;
}
void
filterx_binary_op_free_method(FilterXExpr *s)
{
FilterXBinaryOp *self = (FilterXBinaryOp *) s;
filterx_expr_unref(self->lhs);
filterx_expr_unref(self->rhs);
filterx_expr_free_method(s);
}
void
filterx_binary_op_init_instance(FilterXBinaryOp *self, FilterXExpr *lhs, FilterXExpr *rhs)
{
filterx_expr_init_instance(&self->super);
self->super.free_fn = filterx_binary_op_free_method;
self->lhs = lhs;
self->rhs = rhs;
}
gboolean
filterx_expr_list_eval(GList *expressions, FilterXObject **result)
{
*result = NULL;
for (GList *elem = expressions; elem; elem = elem->next)
{
filterx_object_unref(*result);
FilterXExpr *expr = elem->data;
*result = filterx_expr_eval(expr);
if (!(*result) ||
(!expr->ignore_falsy_result && filterx_object_falsy(*result)))
return FALSE;
}
return TRUE;
}
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