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/* Copyright (c) 2009, 2010 Nicira, Inc.
*
* 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 OVSDB_CONDITION_H
#define OVSDB_CONDITION_H 1
#include <stddef.h>
#include "compiler.h"
#include "ovsdb-data.h"
struct json;
struct ovsdb_table_schema;
struct ovsdb_row;
/* These list is ordered in ascending order of the fraction of tables row that
* they are (heuristically) expected to leave in query results. */
#define OVSDB_FUNCTIONS \
OVSDB_FUNCTION(OVSDB_F_EQ, "==") \
OVSDB_FUNCTION(OVSDB_F_INCLUDES, "includes") \
OVSDB_FUNCTION(OVSDB_F_LE, "<=") \
OVSDB_FUNCTION(OVSDB_F_LT, "<") \
OVSDB_FUNCTION(OVSDB_F_GE, ">=") \
OVSDB_FUNCTION(OVSDB_F_GT, ">") \
OVSDB_FUNCTION(OVSDB_F_EXCLUDES, "excludes") \
OVSDB_FUNCTION(OVSDB_F_NE, "!=")
enum ovsdb_function {
#define OVSDB_FUNCTION(ENUM, NAME) ENUM,
OVSDB_FUNCTIONS
#undef OVSDB_FUNCTION
};
struct ovsdb_error *ovsdb_function_from_string(const char *,
enum ovsdb_function *)
WARN_UNUSED_RESULT;
const char *ovsdb_function_to_string(enum ovsdb_function);
struct ovsdb_clause {
enum ovsdb_function function;
const struct ovsdb_column *column;
struct ovsdb_datum arg;
};
struct ovsdb_condition {
struct ovsdb_clause *clauses;
size_t n_clauses;
};
#define OVSDB_CONDITION_INITIALIZER { NULL, 0 }
struct ovsdb_error *ovsdb_condition_from_json(
const struct ovsdb_table_schema *,
const struct json *, struct ovsdb_symbol_table *,
struct ovsdb_condition *) WARN_UNUSED_RESULT;
struct json *ovsdb_condition_to_json(const struct ovsdb_condition *);
void ovsdb_condition_destroy(struct ovsdb_condition *);
bool ovsdb_condition_evaluate(const struct ovsdb_row *,
const struct ovsdb_condition *);
#endif /* ovsdb/condition.h */
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