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e0edde6f | 1 | /* Copyright (c) 2009, 2010 Nicira, Inc. |
f85f8ebb BP |
2 | * |
3 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | * you may not use this file except in compliance with the License. | |
5 | * You may obtain a copy of the License at: | |
6 | * | |
7 | * http://www.apache.org/licenses/LICENSE-2.0 | |
8 | * | |
9 | * Unless required by applicable law or agreed to in writing, software | |
10 | * distributed under the License is distributed on an "AS IS" BASIS, | |
11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | * See the License for the specific language governing permissions and | |
13 | * limitations under the License. | |
14 | */ | |
15 | ||
16 | #ifndef OVSDB_CONDITION_H | |
17 | #define OVSDB_CONDITION_H 1 | |
18 | ||
19 | #include <stddef.h> | |
20 | #include "compiler.h" | |
21 | #include "ovsdb-data.h" | |
22 | ||
23 | struct json; | |
24 | struct ovsdb_table_schema; | |
25 | struct ovsdb_row; | |
26 | ||
27 | /* These list is ordered in ascending order of the fraction of tables row that | |
28 | * they are (heuristically) expected to leave in query results. */ | |
29 | #define OVSDB_FUNCTIONS \ | |
30 | OVSDB_FUNCTION(OVSDB_F_EQ, "==") \ | |
31 | OVSDB_FUNCTION(OVSDB_F_INCLUDES, "includes") \ | |
32 | OVSDB_FUNCTION(OVSDB_F_LE, "<=") \ | |
33 | OVSDB_FUNCTION(OVSDB_F_LT, "<") \ | |
34 | OVSDB_FUNCTION(OVSDB_F_GE, ">=") \ | |
35 | OVSDB_FUNCTION(OVSDB_F_GT, ">") \ | |
36 | OVSDB_FUNCTION(OVSDB_F_EXCLUDES, "excludes") \ | |
37 | OVSDB_FUNCTION(OVSDB_F_NE, "!=") | |
38 | ||
39 | enum ovsdb_function { | |
40 | #define OVSDB_FUNCTION(ENUM, NAME) ENUM, | |
41 | OVSDB_FUNCTIONS | |
42 | #undef OVSDB_FUNCTION | |
43 | }; | |
44 | ||
45 | struct ovsdb_error *ovsdb_function_from_string(const char *, | |
46 | enum ovsdb_function *) | |
47 | WARN_UNUSED_RESULT; | |
48 | const char *ovsdb_function_to_string(enum ovsdb_function); | |
49 | ||
50 | struct ovsdb_clause { | |
51 | enum ovsdb_function function; | |
52 | const struct ovsdb_column *column; | |
53 | struct ovsdb_datum arg; | |
54 | }; | |
55 | ||
56 | struct ovsdb_condition { | |
57 | struct ovsdb_clause *clauses; | |
58 | size_t n_clauses; | |
59 | }; | |
60 | ||
61 | #define OVSDB_CONDITION_INITIALIZER { NULL, 0 } | |
62 | ||
63 | struct ovsdb_error *ovsdb_condition_from_json( | |
64 | const struct ovsdb_table_schema *, | |
fbf925e4 | 65 | const struct json *, struct ovsdb_symbol_table *, |
f85f8ebb BP |
66 | struct ovsdb_condition *) WARN_UNUSED_RESULT; |
67 | struct json *ovsdb_condition_to_json(const struct ovsdb_condition *); | |
68 | void ovsdb_condition_destroy(struct ovsdb_condition *); | |
69 | bool ovsdb_condition_evaluate(const struct ovsdb_row *, | |
70 | const struct ovsdb_condition *); | |
71 | ||
72 | #endif /* ovsdb/condition.h */ |