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1 | /* |
2 | * Copyright (c) 2015 Nicira, Inc. | |
3 | * | |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | #undef NDEBUG | |
19 | #include <stdio.h> | |
20 | #include "ofpbuf.h" | |
21 | #include "ovstest.h" | |
22 | #include "util.h" | |
23 | ||
24 | #define BUF_SIZE 100 | |
25 | #define HDR_OFS 10 | |
26 | #define MSG_OFS 50 | |
27 | ||
28 | static void | |
29 | test_ofpbuf_main(int argc OVS_UNUSED, char *argv[] OVS_UNUSED) | |
30 | { | |
31 | struct ofpbuf *buf = ofpbuf_new(BUF_SIZE); | |
32 | int exit_code = 0; | |
33 | ||
34 | /* Init checks. */ | |
35 | ovs_assert(!buf->size); | |
36 | ovs_assert(buf->allocated == BUF_SIZE); | |
37 | ovs_assert(buf->base == buf->data); | |
38 | ||
39 | /* Sets 'buf->header' and 'buf->msg'. */ | |
40 | buf->header = (char *) buf->base + HDR_OFS; | |
41 | buf->msg = (char *) buf->base + MSG_OFS; | |
42 | ||
43 | /* Gets another 'BUF_SIZE' bytes headroom. */ | |
44 | ofpbuf_prealloc_headroom(buf, BUF_SIZE); | |
45 | ovs_assert(!buf->size); | |
46 | ovs_assert(buf->allocated == 2 * BUF_SIZE); | |
47 | ovs_assert((char *) buf->base + BUF_SIZE == buf->data); | |
48 | /* Now 'buf->header' and 'buf->msg' must be BUF_SIZE away from | |
49 | * their original offsets. */ | |
50 | ovs_assert(buf->header == (char *) buf->base + BUF_SIZE + HDR_OFS); | |
51 | ovs_assert(buf->msg == (char *) buf->base + BUF_SIZE + MSG_OFS); | |
52 | ||
53 | /* Gets another 'BUF_SIZE' bytes tailroom. */ | |
54 | ofpbuf_prealloc_tailroom(buf, BUF_SIZE); | |
55 | /* Must remain unchanged. */ | |
56 | ovs_assert(!buf->size); | |
57 | ovs_assert(buf->allocated == 2 * BUF_SIZE); | |
58 | ovs_assert((char *) buf->base + BUF_SIZE == buf->data); | |
59 | ovs_assert(buf->header == (char *) buf->base + BUF_SIZE + HDR_OFS); | |
60 | ovs_assert(buf->msg == (char *) buf->base + BUF_SIZE + MSG_OFS); | |
61 | ||
62 | ofpbuf_delete(buf); | |
63 | exit(exit_code); | |
64 | } | |
65 | ||
66 | OVSTEST_REGISTER("test-ofpbuf", test_ofpbuf_main); |