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_thread_mutex.h"
19
20APR_DECLARE(apr_status_t) apr_file_buffer_set(apr_file_t *file,
21                                              char * buffer,
22                                              apr_size_t bufsize)
23{
24    apr_status_t rv;
25
26    apr_thread_mutex_lock(file->mutex);
27
28    if(file->buffered) {
29        /* Flush the existing buffer */
30        rv = apr_file_flush(file);
31        if (rv != APR_SUCCESS) {
32            apr_thread_mutex_unlock(file->mutex);
33            return rv;
34        }
35    }
36
37    file->buffer = buffer;
38    file->bufsize = bufsize;
39    file->buffered = 1;
40    file->bufpos = 0;
41    file->direction = 0;
42    file->dataRead = 0;
43
44    if (file->bufsize == 0) {
45            /* Setting the buffer size to zero is equivalent to turning
46             * buffering off.
47             */
48            file->buffered = 0;
49    }
50
51    apr_thread_mutex_unlock(file->mutex);
52
53    return APR_SUCCESS;
54}
55
56APR_DECLARE(apr_size_t) apr_file_buffer_size_get(apr_file_t *file)
57{
58    return file->bufsize;
59}
60