| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef _EDGEPOINTERUTIL_H_ |
| #define _EDGEPOINTERUTIL_H_ |
| |
| typedef short EdgePointer; |
| |
| inline EdgePointer sym(EdgePointer a) |
| { |
| return a ^ 2; |
| } |
| |
| inline EdgePointer rot(EdgePointer a) |
| { |
| return (((a) + 1) & 3) | ((a) & ~3); |
| } |
| |
| inline EdgePointer rotinv(EdgePointer a) |
| { |
| return (((a) + 3) & 3) | ((a) & ~3); |
| } |
| |
| #endif //_EDGEPOINTERUTIL_H_ |
