1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  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 "apr_arch_file_io.h"
18#include "apr_pools.h"
19#include "apr_thread_mutex.h"
20
21APR_DECLARE(apr_status_t) apr_file_buffer_set(apr_file_t *file,
22                                              char * buffer,
23                                              apr_size_t bufsize)
24{
25    apr_status_t rv;
26
27    file_lock(file);
28
29    if(file->buffered) {
30        /* Flush the existing buffer */
31        rv = apr_file_flush_locked(file);
32        if (rv != APR_SUCCESS) {
33            file_unlock(file);
34            return rv;
35        }
36    }
37
38    file->buffer = buffer;
39    file->bufsize = bufsize;
40    file->buffered = 1;
41    file->bufpos = 0;
42    file->direction = 0;
43    file->dataRead = 0;
44
45    if (file->bufsize == 0) {
46            /* Setting the buffer size to zero is equivalent to turning
47             * buffering off.
48             */
49            file->buffered = 0;
50    }
51
52    file_unlock(file);
53
54    return APR_SUCCESS;
55}
56
57APR_DECLARE(apr_size_t) apr_file_buffer_size_get(apr_file_t *file)
58{
59    return file->bufsize;
60}
61