common.c revision 251875 
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/* common .c
18 * This file has any function that is truly common and platform
19 * neutral.  Or at least that's the theory.
20 *
21 * The header files are a problem so there are a few #ifdef's to take
22 * care of those.
23 *
24 */
25
26#include "apr.h"
27#include "apr_private.h"
28#include "apr_mmap.h"
29#include "apr_errno.h"
30
31#if APR_HAS_MMAP || defined(BEOS)
32
33APR_DECLARE(apr_status_t) apr_mmap_offset(void **addr, apr_mmap_t *mmap,
34                                          apr_off_t offset)
35{
36    if (offset < 0 || (apr_size_t)offset > mmap->size)
37        return APR_EINVAL;
38
39    (*addr) = (char *) mmap->mm + offset;
40    return APR_SUCCESS;
41}
42
43#endif
44