1 /* Copyright (c) 2008, 2009, 2010 Nicira, Inc.
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.
19 #include "openvswitch/uuid.h"
21 /* Formats a UUID as a string, in the conventional format.
24 * struct uuid uuid = ...;
25 * printf("This UUID is "UUID_FMT"\n", UUID_ARGS(&uuid));
29 #define UUID_FMT "%08x-%04x-%04x-%04x-%04x%08x"
30 #define UUID_ARGS(UUID) \
31 ((unsigned int) ((UUID)->parts[0])), \
32 ((unsigned int) ((UUID)->parts[1] >> 16)), \
33 ((unsigned int) ((UUID)->parts[1] & 0xffff)), \
34 ((unsigned int) ((UUID)->parts[2] >> 16)), \
35 ((unsigned int) ((UUID)->parts[2] & 0xffff)), \
36 ((unsigned int) ((UUID)->parts[3]))
38 /* Returns a hash value for 'uuid'. This hash value is the same regardless of
39 * whether we are running on a 32-bit or 64-bit or big-endian or little-endian
42 uuid_hash(const struct uuid *uuid)
44 return uuid->parts[0];
47 /* Returns true if 'a == b', false otherwise. */
49 uuid_equals(const struct uuid *a, const struct uuid *b)
51 return (a->parts[0] == b->parts[0]
52 && a->parts[1] == b->parts[1]
53 && a->parts[2] == b->parts[2]
54 && a->parts[3] == b->parts[3]);
58 void uuid_generate(struct uuid *);
59 void uuid_zero(struct uuid *);
60 bool uuid_is_zero(const struct uuid *);
61 int uuid_compare_3way(const struct uuid *, const struct uuid *);
62 bool uuid_from_string(struct uuid *, const char *);
63 bool uuid_from_string_prefix(struct uuid *, const char *);
64 void uuid_set_bits_v4(struct uuid *);