blob: af7d196e85e728e1309d72fbb8cb829b76e5bd23 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* util.h
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#ifndef SQFS_UTIL_H
#define SQFS_UTIL_H
#include "config.h"
#include "sqfs/predef.h"
#include "compat.h"
#include <stddef.h>
/*
Helper for allocating data structures with flexible array members.
'base_size' is the size of the struct itself, 'item_size' the size of a
single array element and 'nmemb' the number of elements.
Iternally checks for arithmetic overflows when allocating the combined thing.
*/
SQFS_INTERNAL
void *alloc_flex(size_t base_size, size_t item_size, size_t nmemb);
/* Basically the same as calloc, but *ALWAYS* does overflow checking */
SQFS_INTERNAL
void *alloc_array(size_t item_size, size_t nmemb);
SQFS_INTERNAL sqfs_u32 xxh32(const void *input, const size_t len);
/*
Returns true if the given region of memory is filled with zero-bytes only.
*/
SQFS_INTERNAL bool is_memory_zero(const void *blob, size_t size);
/*
A wrapper around mkdir() that behaves like 'mkdir -p'. It tries to create
every component of the given path and skips already existing entries.
Returns 0 on success.
*/
SQFS_INTERNAL int mkdir_p(const char *path);
#endif /* SQFS_UTIL_H */
|
