| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| /*------------------------------------------------------------------------- |
| * |
| * cdbdef.h |
| * Definitions for use anywhere |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef CDBDEF_H |
| #define CDBDEF_H |
| |
| |
| /* |
| * CdbSwap |
| * Exchange the contents of two variables. |
| */ |
| #define CdbSwap(_type, _x, _y) \ |
| do \ |
| { \ |
| _type _t = (_x); \ |
| _x = (_y); \ |
| _y = (_t); \ |
| } while (0) |
| |
| |
| /* |
| * CdbVisitOpt |
| * Some tree walkers use these codes to direct the traversal. |
| */ |
| typedef enum |
| { |
| CdbVisit_Walk = 1, /* proceed in normal sequence */ |
| CdbVisit_Skip, /* no more calls for current node or its kids */ |
| CdbVisit_Stop, /* break out of traversal, no more callbacks */ |
| CdbVisit_Failure, /* break out of traversal, no more callbacks */ |
| CdbVisit_Success /* break out of traversal, no more callbacks */ |
| } CdbVisitOpt; |
| |
| |
| #endif /* CDBDEF_H */ |
