1 /*
2 * Copyright (C) 2022 Huawei Device Co., Ltd.
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions
5 * are met:
6 * 1. Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 * 2. Redistributions in binary form must reproduce the above copyright
9 * notice, this list of conditions and the following disclaimer in the
10 * documentation and/or other materials provided with the distribution.
11 *
12 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
13 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
14 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
15 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
18 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
19 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
22 */
23
24 #ifndef _FS_UTIL_H
25 #define _FS_UTIL_H
26
27 #include <stdint.h>
28
29 #define pwarn printf
30 #define pfatal printf
31 #define perr printf
32
33
34 /*
35 * le16dec(),le32dec(),le16enc(),le32enc()
36 * Link： https://github.com/freebsd/freebsd-src/
37 * Path: freebsd-src/contrib/elftoolchain/libpe/_libpe.h
38 */
39 /* Encode/Decode macros */
40 #if defined(ELFTC_NEED_BYTEORDER_EXTENSIONS)
41 static __inline uint16_t
le16dec(const void * pp)42 le16dec(const void *pp)
43 {
44 unsigned char const *p = (unsigned char const *)pp;
45
46 return ((p[1] << 8) | p[0]);
47 }
48
49 static __inline uint32_t
le32dec(const void * pp)50 le32dec(const void *pp)
51 {
52 unsigned char const *p = (unsigned char const *)pp;
53
54 return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
55 }
56
57 static __inline void
le16enc(void * pp,uint16_t u)58 le16enc(void *pp, uint16_t u)
59 {
60 unsigned char *p = (unsigned char *)pp;
61
62 p[0] = u & 0xff;
63 p[1] = (u >> 8) & 0xff;
64 }
65
66 static __inline void
le32enc(void * pp,uint32_t u)67 le32enc(void *pp, uint32_t u)
68 {
69 unsigned char *p = (unsigned char *)pp;
70
71 p[0] = u & 0xff;
72 p[1] = (u >> 8) & 0xff;
73 p[2] = (u >> 16) & 0xff;
74 p[3] = (u >> 24) & 0xff;
75 }
76 #endif /* ELFTC_NEED_BYTEORDER_EXTENSIONS */
77
78 /*
79 * roundup2
80 * Link： https://github.com/freebsd/freebsd-src/
81 * Path: freebsd-src/tools/build/cross-build/include/common/sys/cdefs.h
82 */
83 #ifndef roundup2
84 #define roundup2(x, y) \
85 (((x) + ((y)-1)) & (~((y)-1))) /* if y is powers of two */
86 #endif
87 #endif // _FS_UTIL_H