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/*
* 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_
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