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/*
* Copyright (c) 2015 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#undef NDEBUG
#include <stdio.h>
#include "openvswitch/ofpbuf.h"
#include "ovstest.h"
#include "util.h"
#define BUF_SIZE 100
#define HDR_OFS 10
#define MSG_OFS 50
static void
test_ofpbuf_main(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
struct ofpbuf *buf = ofpbuf_new(BUF_SIZE);
int exit_code = 0;
/* Init checks. */
ovs_assert(!buf->size);
ovs_assert(buf->allocated == BUF_SIZE);
ovs_assert(buf->base == buf->data);
/* Sets 'buf->header' and 'buf->msg'. */
buf->header = (char *) buf->base + HDR_OFS;
buf->msg = (char *) buf->base + MSG_OFS;
/* Gets another 'BUF_SIZE' bytes headroom. */
ofpbuf_prealloc_headroom(buf, BUF_SIZE);
ovs_assert(!buf->size);
ovs_assert(buf->allocated == 2 * BUF_SIZE);
ovs_assert((char *) buf->base + BUF_SIZE == buf->data);
/* Now 'buf->header' and 'buf->msg' must be BUF_SIZE away from
* their original offsets. */
ovs_assert(buf->header == (char *) buf->base + BUF_SIZE + HDR_OFS);
ovs_assert(buf->msg == (char *) buf->base + BUF_SIZE + MSG_OFS);
/* Gets another 'BUF_SIZE' bytes tailroom. */
ofpbuf_prealloc_tailroom(buf, BUF_SIZE);
/* Must remain unchanged. */
ovs_assert(!buf->size);
ovs_assert(buf->allocated == 2 * BUF_SIZE);
ovs_assert((char *) buf->base + BUF_SIZE == buf->data);
ovs_assert(buf->header == (char *) buf->base + BUF_SIZE + HDR_OFS);
ovs_assert(buf->msg == (char *) buf->base + BUF_SIZE + MSG_OFS);
ofpbuf_delete(buf);
exit(exit_code);
}
OVSTEST_REGISTER("test-ofpbuf", test_ofpbuf_main);
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