mirror of https://gitee.com/bigwinds/arangodb
145 lines
5.2 KiB
C
Executable File
145 lines
5.2 KiB
C
Executable File
////////////////////////////////////////////////////////////////////////////////
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/// @brief sl-operator (operators used for skiplists and others)
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2011 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Dr. O
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/// @author Copyright 2011, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef TRIAGENS_DURHAM_SKIPLISTS_SL_OPERATOR_H
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#define TRIAGENS_DURHAM_SKIPLISTS_SL_OPERATOR_H 1
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#include "BasicsC/json.h"
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#include "ShapedJson/json-shaper.h"
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#include "ShapedJson/shaped-json.h"
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#include "VocBase/vocbase.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// -----------------------------------------------------------------------------
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// --SECTION-- public types
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup VocBase
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief select clause type
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////////////////////////////////////////////////////////////////////////////////
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typedef enum {
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TRI_SL_EQ_OPERATOR,
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TRI_SL_NE_OPERATOR,
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TRI_SL_LE_OPERATOR,
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TRI_SL_LT_OPERATOR,
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TRI_SL_GE_OPERATOR,
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TRI_SL_GT_OPERATOR,
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TRI_SL_AND_OPERATOR,
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TRI_SL_NOT_OPERATOR,
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TRI_SL_OR_OPERATOR
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}
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TRI_sl_operator_type_e;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief operands and operators
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////////////////////////////////////////////////////////////////////////////////
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typedef struct TRI_sl_operator_s {
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TRI_sl_operator_type_e _type;
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TRI_shaper_t* _shaper;
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}
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TRI_sl_operator_t;
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//................................................................................
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// Storage for NOT / AND / OR logical operators used in skip list indexes and others
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// It is a binary or unary operator
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//................................................................................
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typedef struct TRI_sl_logical_operator_s {
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TRI_sl_operator_t _base;
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TRI_sl_operator_t* _left; // could be a relation or another logical operator
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TRI_sl_operator_t* _right; // could be a relation or another logical operator
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}
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TRI_sl_logical_operator_t;
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typedef struct TRI_sl_relation_operator_s {
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TRI_sl_operator_t _base;
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TRI_json_t* _parameters; // parameters with which this relation was called with
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TRI_shaped_json_t* _fields; // actual data from the parameters converted from
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// a json array to a shaped json array
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size_t _numFields; // number of fields in the array above
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void* _collection; // required for the computation of the order operation
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}
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TRI_sl_relation_operator_t;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create a new skiplist operator of the specified type
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///
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/// note that the skiplist will take ownership of the json parameters passed
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/// to it
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////////////////////////////////////////////////////////////////////////////////
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TRI_sl_operator_t* TRI_CreateSLOperator (TRI_sl_operator_type_e,
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TRI_sl_operator_t*,
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TRI_sl_operator_t*,
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TRI_json_t*,
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TRI_shaper_t*,
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TRI_shaped_json_t*,
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size_t,
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void*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief copy a skiplist operator recursively (deep copy)
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////////////////////////////////////////////////////////////////////////////////
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TRI_sl_operator_t* TRI_CopySLOperator (TRI_sl_operator_t*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief free a skiplist operator recursively
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///
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/// note that this will also free all the bound json parameters
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////////////////////////////////////////////////////////////////////////////////
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void TRI_FreeSLOperator (TRI_sl_operator_t*);
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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#ifdef __cplusplus
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}
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#endif
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#endif
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
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// End:
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