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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/expr-boolalg.h"
#include "filterx/object-primitive.h"
static FilterXObject *
_eval_not(FilterXExpr *s)
{
FilterXUnaryOp *self = (FilterXUnaryOp *) s;
FilterXObject *result = filterx_expr_eval(self->operand);
if (!result)
return NULL;
gboolean truthy = filterx_object_truthy(result);
filterx_object_unref(result);
if (truthy)
return filterx_boolean_new(FALSE);
else
return filterx_boolean_new(TRUE);
}
FilterXExpr *
filterx_unary_not_new(FilterXExpr *operand)
{
FilterXUnaryOp *self = g_new0(FilterXUnaryOp, 1);
filterx_unary_op_init_instance(self, operand);
self->super.eval = _eval_not;
return &self->super;
}
static FilterXObject *
_eval_and(FilterXExpr *s)
{
FilterXBinaryOp *self = (FilterXBinaryOp *) s;
/* we only evaluate our rhs if lhs is true, e.g. we do fast circuit
* evaluation just like most languages */
FilterXObject *result = filterx_expr_eval(self->lhs);
if (!result)
return NULL;
gboolean lhs_truthy = filterx_object_truthy(result);
filterx_object_unref(result);
if (!lhs_truthy)
return filterx_boolean_new(FALSE);
result = filterx_expr_eval(self->rhs);
if (!result)
return NULL;
gboolean rhs_truthy = filterx_object_truthy(result);
filterx_object_unref(result);
if (!rhs_truthy)
return filterx_boolean_new(FALSE);
return filterx_boolean_new(TRUE);
}
FilterXExpr *
filterx_binary_and_new(FilterXExpr *lhs, FilterXExpr *rhs)
{
FilterXBinaryOp *self = g_new0(FilterXBinaryOp, 1);
filterx_binary_op_init_instance(self, lhs, rhs);
self->super.eval = _eval_and;
return &self->super;
}
static FilterXObject *
_eval_or(FilterXExpr *s)
{
FilterXBinaryOp *self = (FilterXBinaryOp *) s;
/* we only evaluate our rhs if lhs is false, e.g. we do fast circuit
* evaluation just like most languages */
FilterXObject *result = filterx_expr_eval(self->lhs);
if (!result)
return NULL;
gboolean lhs_truthy = filterx_object_truthy(result);
filterx_object_unref(result);
if (lhs_truthy)
return filterx_boolean_new(TRUE);
result = filterx_expr_eval(self->rhs);
if (!result)
return NULL;
gboolean rhs_truthy = filterx_object_truthy(result);
filterx_object_unref(result);
if (rhs_truthy)
return filterx_boolean_new(TRUE);
return filterx_boolean_new(FALSE);
}
FilterXExpr *
filterx_binary_or_new(FilterXExpr *lhs, FilterXExpr *rhs)
{
FilterXBinaryOp *self = g_new0(FilterXBinaryOp, 1);
filterx_binary_op_init_instance(self, lhs, rhs);
self->super.eval = _eval_or;
return &self->super;
}
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