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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 "openvswitch/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                 :          1 : test_ofpbuf_main(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
      30                 :            : {
      31                 :          1 :     struct ofpbuf *buf = ofpbuf_new(BUF_SIZE);
      32                 :          1 :     int exit_code = 0;
      33                 :            : 
      34                 :            :     /* Init checks. */
      35         [ -  + ]:          1 :     ovs_assert(!buf->size);
      36         [ -  + ]:          1 :     ovs_assert(buf->allocated == BUF_SIZE);
      37         [ -  + ]:          1 :     ovs_assert(buf->base == buf->data);
      38                 :            : 
      39                 :            :     /* Sets 'buf->header' and 'buf->msg'. */
      40                 :          1 :     buf->header = (char *) buf->base + HDR_OFS;
      41                 :          1 :     buf->msg = (char *) buf->base + MSG_OFS;
      42                 :            : 
      43                 :            :     /* Gets another 'BUF_SIZE' bytes headroom. */
      44                 :          1 :     ofpbuf_prealloc_headroom(buf, BUF_SIZE);
      45         [ -  + ]:          1 :     ovs_assert(!buf->size);
      46         [ -  + ]:          1 :     ovs_assert(buf->allocated == 2 * BUF_SIZE);
      47         [ -  + ]:          1 :     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         [ -  + ]:          1 :     ovs_assert(buf->header == (char *) buf->base + BUF_SIZE + HDR_OFS);
      51         [ -  + ]:          1 :     ovs_assert(buf->msg == (char *) buf->base + BUF_SIZE + MSG_OFS);
      52                 :            : 
      53                 :            :     /* Gets another 'BUF_SIZE' bytes tailroom. */
      54                 :          1 :     ofpbuf_prealloc_tailroom(buf, BUF_SIZE);
      55                 :            :     /* Must remain unchanged. */
      56         [ -  + ]:          1 :     ovs_assert(!buf->size);
      57         [ -  + ]:          1 :     ovs_assert(buf->allocated == 2 * BUF_SIZE);
      58         [ -  + ]:          1 :     ovs_assert((char *) buf->base + BUF_SIZE == buf->data);
      59         [ -  + ]:          1 :     ovs_assert(buf->header == (char *) buf->base + BUF_SIZE + HDR_OFS);
      60         [ -  + ]:          1 :     ovs_assert(buf->msg == (char *) buf->base + BUF_SIZE + MSG_OFS);
      61                 :            : 
      62                 :          1 :     ofpbuf_delete(buf);
      63                 :          1 :     exit(exit_code);
      64                 :            : }
      65                 :            : 
      66                 :       1175 : OVSTEST_REGISTER("test-ofpbuf", test_ofpbuf_main);