1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _EDGEPOINTERUTIL_H_
18#define _EDGEPOINTERUTIL_H_
19
20typedef short EdgePointer;
21
22inline EdgePointer sym(EdgePointer a)
23{
24  return a ^ 2;
25}
26
27inline EdgePointer rot(EdgePointer a)
28{
29  return (((a) + 1) & 3) | ((a) & ~3);
30}
31
32inline EdgePointer rotinv(EdgePointer a)
33{
34  return (((a) + 3) & 3) | ((a) & ~3);
35}
36
37#endif //_EDGEPOINTERUTIL_H_
38