1 /* Copyright (c) 2009, 2010 Nicira Networks
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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #define OVSDB_TYPES_H 1
27 /* An atomic type: one that OVSDB regards as a single unit of data. */
28 enum ovsdb_atomic_type {
29 OVSDB_TYPE_VOID, /* No value. */
30 OVSDB_TYPE_INTEGER, /* Signed 64-bit integer. */
31 OVSDB_TYPE_REAL, /* IEEE 754 double-precision floating point. */
32 OVSDB_TYPE_BOOLEAN, /* True or false. */
33 OVSDB_TYPE_STRING, /* UTF-8 string. */
34 OVSDB_TYPE_UUID, /* RFC 4122 UUID referencing a table row. */
38 static inline bool ovsdb_atomic_type_is_valid(enum ovsdb_atomic_type);
39 bool ovsdb_atomic_type_from_string(const char *, enum ovsdb_atomic_type *);
40 struct ovsdb_error *ovsdb_atomic_type_from_json(enum ovsdb_atomic_type *,
42 const char *ovsdb_atomic_type_to_string(enum ovsdb_atomic_type);
43 struct json *ovsdb_atomic_type_to_json(enum ovsdb_atomic_type);
45 /* An atomic type plus optional constraints. */
47 struct ovsdb_base_type {
48 enum ovsdb_atomic_type type;
50 struct ovsdb_integer_constraints {
51 int64_t min; /* minInteger or INT64_MIN. */
52 int64_t max; /* maxInteger or INT64_MAX. */
55 struct ovsdb_real_constraints {
56 double min; /* minReal or -DBL_MAX. */
57 double max; /* minReal or DBL_MAX. */
60 /* No constraints for Boolean types. */
62 struct ovsdb_string_constraints {
63 unsigned int minLen; /* minLength or 0. */
64 unsigned int maxLen; /* maxLength or UINT_MAX. */
67 struct ovsdb_uuid_constraints {
68 char *refTableName; /* Name of referenced table, or NULL. */
69 struct ovsdb_table *refTable; /* Referenced table, if available. */
74 #define OVSDB_BASE_VOID_INIT { .type = OVSDB_TYPE_VOID }
75 #define OVSDB_BASE_INTEGER_INIT { .type = OVSDB_TYPE_INTEGER, \
76 .u.integer = { INT64_MIN, INT64_MAX } }
77 #define OVSDB_BASE_REAL_INIT { .type = OVSDB_TYPE_REAL, \
78 .u.real = { -DBL_MAX, DBL_MAX } }
79 #define OVSDB_BASE_BOOLEAN_INIT { .type = OVSDB_TYPE_BOOLEAN }
80 #define OVSDB_BASE_STRING_INIT { .type = OVSDB_TYPE_STRING, \
81 .u.string = { 0, UINT_MAX } }
82 #define OVSDB_BASE_UUID_INIT { .type = OVSDB_TYPE_UUID, \
83 .u.uuid = { NULL, NULL } }
85 void ovsdb_base_type_init(struct ovsdb_base_type *, enum ovsdb_atomic_type);
86 void ovsdb_base_type_clone(struct ovsdb_base_type *,
87 const struct ovsdb_base_type *);
88 void ovsdb_base_type_destroy(struct ovsdb_base_type *);
90 bool ovsdb_base_type_is_valid(const struct ovsdb_base_type *);
91 bool ovsdb_base_type_has_constraints(const struct ovsdb_base_type *);
92 void ovsdb_base_type_clear_constraints(struct ovsdb_base_type *);
94 struct ovsdb_error *ovsdb_base_type_from_json(struct ovsdb_base_type *,
97 struct json *ovsdb_base_type_to_json(const struct ovsdb_base_type *);
101 * Several rules constrain the valid types. See ovsdb_type_is_valid() (in
102 * ovsdb-types.c) for details.
104 * If 'value_type' is OVSDB_TYPE_VOID, 'n_min' is 1, and 'n_max' is 1, then the
105 * type is a single atomic 'key_type'.
107 * If 'value_type' is OVSDB_TYPE_VOID and 'n_min' or 'n_max' (or both) has a
108 * value other than 1, then the type is a set of 'key_type'. If 'n_min' is 0
109 * and 'n_max' is 1, then the type can also be considered an optional
112 * If 'value_type' is not OVSDB_TYPE_VOID, then the type is a map from
113 * 'key_type' to 'value_type'. If 'n_min' is 0 and 'n_max' is 1, then the type
114 * can also be considered an optional pair of 'key_type' and 'value_type'.
117 struct ovsdb_base_type key;
118 struct ovsdb_base_type value;
120 unsigned int n_max; /* UINT_MAX stands in for "unlimited". */
123 #define OVSDB_TYPE_SCALAR_INITIALIZER(KEY) { KEY, OVSDB_BASE_VOID_INIT, 1, 1 }
125 extern const struct ovsdb_type ovsdb_type_integer;
126 extern const struct ovsdb_type ovsdb_type_real;
127 extern const struct ovsdb_type ovsdb_type_boolean;
128 extern const struct ovsdb_type ovsdb_type_string;
129 extern const struct ovsdb_type ovsdb_type_uuid;
131 void ovsdb_type_clone(struct ovsdb_type *, const struct ovsdb_type *);
132 void ovsdb_type_destroy(struct ovsdb_type *);
134 bool ovsdb_type_is_valid(const struct ovsdb_type *);
136 static inline bool ovsdb_type_is_scalar(const struct ovsdb_type *);
137 static inline bool ovsdb_type_is_optional(const struct ovsdb_type *);
138 static inline bool ovsdb_type_is_composite(const struct ovsdb_type *);
139 static inline bool ovsdb_type_is_set(const struct ovsdb_type *);
140 static inline bool ovsdb_type_is_map(const struct ovsdb_type *);
142 char *ovsdb_type_to_english(const struct ovsdb_type *);
144 struct ovsdb_error *ovsdb_type_from_json(struct ovsdb_type *,
147 struct json *ovsdb_type_to_json(const struct ovsdb_type *);
149 /* Inline function implementations. */
152 ovsdb_atomic_type_is_valid(enum ovsdb_atomic_type atomic_type)
154 return atomic_type >= 0 && atomic_type < OVSDB_N_TYPES;
157 static inline bool ovsdb_type_is_scalar(const struct ovsdb_type *type)
159 return (type->value.type == OVSDB_TYPE_VOID
160 && type->n_min == 1 && type->n_max == 1);
163 static inline bool ovsdb_type_is_optional(const struct ovsdb_type *type)
165 return type->n_min == 0;
168 static inline bool ovsdb_type_is_composite(const struct ovsdb_type *type)
170 return type->n_max > 1;
173 static inline bool ovsdb_type_is_set(const struct ovsdb_type *type)
175 return (type->value.type == OVSDB_TYPE_VOID
176 && (type->n_min != 1 || type->n_max != 1));
179 static inline bool ovsdb_type_is_map(const struct ovsdb_type *type)
181 return type->value.type != OVSDB_TYPE_VOID;
184 #endif /* ovsdb-types.h */