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 20 typedef short EdgePointer; 21 22 inline EdgePointer sym(EdgePointer a) 23 { 24 return a ^ 2; 25 } 26 27 inline EdgePointer rot(EdgePointer a) 28 { 29 return (((a) + 1) & 3) | ((a) & ~3); 30 } 31 32 inline EdgePointer rotinv(EdgePointer a) 33 { 34 return (((a) + 3) & 3) | ((a) & ~3); 35 } 36 37 #endif //_EDGEPOINTERUTIL_H_ 38
