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1 | /* Copyright (c) 2009 Nicira Networks |
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_DATA_H | |
17 | #define OVSDB_DATA_H 1 | |
18 | ||
19 | #include <stdlib.h> | |
20 | #include "compiler.h" | |
21 | #include "ovsdb-types.h" | |
22 | ||
23 | struct ovsdb_symbol_table; | |
24 | ||
25 | /* One value of an atomic type (given by enum ovs_atomic_type). */ | |
26 | union ovsdb_atom { | |
27 | int64_t integer; | |
28 | double real; | |
29 | bool boolean; | |
30 | char *string; | |
31 | struct uuid uuid; | |
32 | }; | |
33 | ||
34 | void ovsdb_atom_init_default(union ovsdb_atom *, enum ovsdb_atomic_type); | |
35 | void ovsdb_atom_clone(union ovsdb_atom *, const union ovsdb_atom *, | |
36 | enum ovsdb_atomic_type); | |
37 | void ovsdb_atom_swap(union ovsdb_atom *, union ovsdb_atom *); | |
38 | ||
39 | static inline bool | |
40 | ovsdb_atom_needs_destruction(enum ovsdb_atomic_type type) | |
41 | { | |
42 | return type == OVSDB_TYPE_STRING; | |
43 | } | |
44 | ||
45 | static inline void | |
46 | ovsdb_atom_destroy(union ovsdb_atom *atom, enum ovsdb_atomic_type type) | |
47 | { | |
48 | if (type == OVSDB_TYPE_STRING) { | |
49 | free(atom->string); | |
50 | } | |
51 | } | |
52 | ||
53 | uint32_t ovsdb_atom_hash(const union ovsdb_atom *, enum ovsdb_atomic_type, | |
54 | uint32_t basis); | |
55 | ||
56 | int ovsdb_atom_compare_3way(const union ovsdb_atom *, | |
57 | const union ovsdb_atom *, | |
58 | enum ovsdb_atomic_type); | |
59 | ||
60 | static inline bool ovsdb_atom_equals(const union ovsdb_atom *a, | |
61 | const union ovsdb_atom *b, | |
62 | enum ovsdb_atomic_type type) | |
63 | { | |
64 | return !ovsdb_atom_compare_3way(a, b, type); | |
65 | } | |
66 | ||
67 | struct ovsdb_error *ovsdb_atom_from_json(union ovsdb_atom *, | |
68 | enum ovsdb_atomic_type, | |
69 | const struct json *, | |
70 | const struct ovsdb_symbol_table *) | |
71 | WARN_UNUSED_RESULT; | |
72 | struct json *ovsdb_atom_to_json(const union ovsdb_atom *, | |
73 | enum ovsdb_atomic_type); | |
74 | \f | |
75 | /* One value of an OVSDB type (given by struct ovsdb_type). */ | |
76 | struct ovsdb_datum { | |
77 | unsigned int n; /* Number of 'keys' and 'values'. */ | |
78 | union ovsdb_atom *keys; /* Each of the ovsdb_type's 'key_type'. */ | |
79 | union ovsdb_atom *values; /* Each of the ovsdb_type's 'value_type'. */ | |
80 | }; | |
81 | ||
82 | void ovsdb_datum_init_default(struct ovsdb_datum *, const struct ovsdb_type *); | |
83 | void ovsdb_datum_clone(struct ovsdb_datum *, const struct ovsdb_datum *, | |
84 | const struct ovsdb_type *); | |
85 | void ovsdb_datum_destroy(struct ovsdb_datum *, const struct ovsdb_type *); | |
86 | void ovsdb_datum_swap(struct ovsdb_datum *, struct ovsdb_datum *); | |
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87 | struct ovsdb_error *ovsdb_datum_sort(struct ovsdb_datum *, |
88 | const struct ovsdb_type *); | |
f85f8ebb BP |
89 | |
90 | struct ovsdb_error *ovsdb_datum_from_json(struct ovsdb_datum *, | |
91 | const struct ovsdb_type *, | |
92 | const struct json *, | |
93 | const struct ovsdb_symbol_table *) | |
94 | WARN_UNUSED_RESULT; | |
95 | struct json *ovsdb_datum_to_json(const struct ovsdb_datum *, | |
96 | const struct ovsdb_type *); | |
97 | ||
98 | uint32_t ovsdb_datum_hash(const struct ovsdb_datum *, | |
99 | const struct ovsdb_type *, uint32_t basis); | |
100 | int ovsdb_datum_compare_3way(const struct ovsdb_datum *, | |
101 | const struct ovsdb_datum *, | |
102 | const struct ovsdb_type *); | |
103 | bool ovsdb_datum_equals(const struct ovsdb_datum *, | |
104 | const struct ovsdb_datum *, | |
105 | const struct ovsdb_type *); | |
106 | bool ovsdb_datum_includes_all(const struct ovsdb_datum *, | |
107 | const struct ovsdb_datum *, | |
108 | const struct ovsdb_type *); | |
109 | bool ovsdb_datum_excludes_all(const struct ovsdb_datum *, | |
110 | const struct ovsdb_datum *, | |
111 | const struct ovsdb_type *); | |
112 | ||
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113 | void ovsdb_datum_union(struct ovsdb_datum *, |
114 | const struct ovsdb_datum *, | |
115 | const struct ovsdb_type *); | |
116 | void ovsdb_datum_subtract(struct ovsdb_datum *a, | |
117 | const struct ovsdb_type *a_type, | |
118 | const struct ovsdb_datum *b, | |
119 | const struct ovsdb_type *b_type); | |
120 | ||
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121 | static inline bool |
122 | ovsdb_datum_conforms_to_type(const struct ovsdb_datum *datum, | |
123 | const struct ovsdb_type *type) | |
124 | { | |
125 | return datum->n >= type->n_min && datum->n <= type->n_max; | |
126 | } | |
127 | \f | |
128 | /* A table mapping from names to data items. Currently the data items are | |
129 | * always UUIDs; perhaps this will be expanded in the future. */ | |
130 | ||
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131 | struct ovsdb_symbol { |
132 | struct uuid uuid; /* The UUID that the symbol represents. */ | |
133 | bool used; /* Already used as row UUID? */ | |
134 | }; | |
135 | ||
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136 | struct ovsdb_symbol_table *ovsdb_symbol_table_create(void); |
137 | void ovsdb_symbol_table_destroy(struct ovsdb_symbol_table *); | |
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138 | struct ovsdb_symbol *ovsdb_symbol_table_get(const struct ovsdb_symbol_table *, |
139 | const char *name); | |
f85f8ebb | 140 | void ovsdb_symbol_table_put(struct ovsdb_symbol_table *, const char *name, |
2d2d6d4a | 141 | const struct uuid *, bool used); |
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142 | |
143 | #endif /* ovsdb-data.h */ |