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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-getattr.h"
#include "filterx/object-string.h"
#include "filterx/filterx-eval.h"
typedef struct _FilterXGetAttr
{
FilterXExpr super;
FilterXExpr *operand;
FilterXObject *attr;
} FilterXGetAttr;
static FilterXObject *
_eval(FilterXExpr *s)
{
FilterXGetAttr *self = (FilterXGetAttr *) s;
FilterXObject *variable = filterx_expr_eval_typed(self->operand);
if (!variable)
return NULL;
FilterXObject *attr = filterx_object_getattr(variable, self->attr);
if (!attr)
{
filterx_eval_push_error("Attribute lookup failed", s, self->attr);
goto exit;
}
exit:
filterx_object_unref(variable);
return attr;
}
static gboolean
_unset(FilterXExpr *s)
{
FilterXGetAttr *self = (FilterXGetAttr *) s;
gboolean result = FALSE;
FilterXObject *variable = filterx_expr_eval_typed(self->operand);
if (!variable)
return FALSE;
if (variable->readonly)
{
filterx_eval_push_error("Object unset-attr failed, object is readonly", s, self->attr);
goto exit;
}
result = filterx_object_unset_key(variable, self->attr);
exit:
filterx_object_unref(variable);
return result;
}
static void
_free(FilterXExpr *s)
{
FilterXGetAttr *self = (FilterXGetAttr *) s;
filterx_object_unref(self->attr);
filterx_expr_unref(self->operand);
filterx_expr_free_method(s);
}
/* NOTE: takes the object reference */
FilterXExpr *
filterx_getattr_new(FilterXExpr *operand, const gchar *attr_name)
{
FilterXGetAttr *self = g_new0(FilterXGetAttr, 1);
filterx_expr_init_instance(&self->super);
self->super.eval = _eval;
self->super.unset = _unset;
self->super.free_fn = _free;
self->operand = operand;
self->attr = filterx_string_new(attr_name, -1);
return &self->super;
}
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