1/*
2 * Copyright (C) 2005 The Android Open Source Project
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//
18// Handy utility functions and portability code.
19//
20#ifndef _LIBS_UTILS_MISC_H
21#define _LIBS_UTILS_MISC_H
22
23#include <sys/time.h>
24#include <utils/Endian.h>
25
26/* get #of elements in a static array */
27#ifndef NELEM
28# define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
29#endif
30
31namespace android {
32
33/*
34 * Some utility functions for working with files.  These could be made
35 * part of a "File" class.
36 */
37typedef enum FileType {
38    kFileTypeUnknown = 0,
39    kFileTypeNonexistent,       // i.e. ENOENT
40    kFileTypeRegular,
41    kFileTypeDirectory,
42    kFileTypeCharDev,
43    kFileTypeBlockDev,
44    kFileTypeFifo,
45    kFileTypeSymlink,
46    kFileTypeSocket,
47} FileType;
48/* get the file's type; follows symlinks */
49FileType getFileType(const char* fileName);
50/* get the file's modification date; returns -1 w/errno set on failure */
51time_t getFileModDate(const char* fileName);
52
53typedef void (*sysprop_change_callback)(void);
54void add_sysprop_change_callback(sysprop_change_callback cb, int priority);
55void report_sysprop_change();
56
57}; // namespace android
58
59#endif // _LIBS_UTILS_MISC_H
60