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0f23ee0c KZ |
1 | /* |
2 | * No copyright is claimed. This code is in the public domain; do with | |
3 | * it what you wish. | |
4 | * | |
5 | * Written by Karel Zak <kzak@redhat.com> | |
6 | */ | |
1ed3367f KZ |
7 | #ifndef BITOPS_H |
8 | #define BITOPS_H | |
9 | ||
1ed3367f | 10 | #include <stdint.h> |
1a1eb4e1 KZ |
11 | #include <sys/param.h> |
12 | ||
13 | #if defined(HAVE_BYTESWAP_H) | |
14 | # include <byteswap.h> | |
15 | #endif | |
16 | ||
17 | #if defined(HAVE_ENDIAN_H) | |
18 | # include <endian.h> | |
19 | #elif defined(HAVE_SYS_ENDIAN_H) /* BSDs have them here */ | |
20 | # include <sys/endian.h> | |
21 | #endif | |
22 | ||
23 | #if defined(__OpenBSD__) | |
24 | # include <sys/types.h> | |
25 | # define be16toh(x) betoh16(x) | |
26 | # define be32toh(x) betoh32(x) | |
27 | # define be64toh(x) betoh64(x) | |
d20eb029 RM |
28 | #elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) |
29 | # define bswap_16(x) bswap16(x) | |
30 | # define bswap_32(x) bswap32(x) | |
31 | # define bswap_64(x) bswap64(x) | |
32 | #elif defined(__APPLE__) | |
33 | # include <libkern/OSByteOrder.h> | |
34 | # define htobe16(x) OSSwapHostToBigInt16(x) | |
35 | # define htole16(x) OSSwapHostToLittleInt16(x) | |
36 | # define be16toh(x) OSSwapBigToHostInt16(x) | |
37 | # define le16toh(x) OSSwapLittleToHostInt16(x) | |
38 | # define htobe32(x) OSSwapHostToBigInt32(x) | |
39 | # define htole32(x) OSSwapHostToLittleInt32(x) | |
40 | # define be32toh(x) OSSwapBigToHostInt32(x) | |
41 | # define le32toh(x) OSSwapLittleToHostInt32(x) | |
42 | # define htobe64(x) OSSwapHostToBigInt64(x) | |
43 | # define htole64(x) OSSwapHostToLittleInt64(x) | |
44 | # define be64toh(x) OSSwapBigToHostInt64(x) | |
45 | # define le64toh(x) OSSwapLittleToHostInt64(x) | |
46 | # define bswap_16(x) OSSwapInt16(x) | |
47 | # define bswap_32(x) OSSwapInt32(x) | |
48 | # define bswap_64(x) OSSwapInt64(x) | |
1a1eb4e1 | 49 | #endif |
1ed3367f | 50 | |
e98754d6 | 51 | /* |
1a1eb4e1 | 52 | * Fallbacks |
d01c0adb RM |
53 | * casts are necessary for constants, because we never know how for sure |
54 | * how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way. | |
e98754d6 | 55 | */ |
1a1eb4e1 | 56 | #ifndef bswap_16 |
d01c0adb RM |
57 | # define bswap_16(x) ((uint16_t)( \ |
58 | (((uint16_t)(x) & 0x00FF) << 8) | \ | |
59 | (((uint16_t)(x) & 0xFF00) >> 8))) | |
1a1eb4e1 KZ |
60 | #endif |
61 | ||
62 | #ifndef bswap_32 | |
d01c0adb RM |
63 | # define bswap_32(x) ((uint32_t)( \ |
64 | (((uint32_t)(x) & 0x000000FF) << 24) | \ | |
65 | (((uint32_t)(x) & 0x0000FF00) << 8) | \ | |
66 | (((uint32_t)(x) & 0x00FF0000) >> 8) | \ | |
67 | (((uint32_t)(x) & 0xFF000000) >> 24))) | |
1a1eb4e1 KZ |
68 | #endif |
69 | ||
70 | #ifndef bswap_64 | |
d01c0adb RM |
71 | # define bswap_64(x) ((uint64_t)( \ |
72 | (((uint64_t)(x) & 0x00000000000000FFULL) << 56) | \ | |
73 | (((uint64_t)(x) & 0x000000000000FF00ULL) << 40) | \ | |
74 | (((uint64_t)(x) & 0x0000000000FF0000ULL) << 24) | \ | |
75 | (((uint64_t)(x) & 0x00000000FF000000ULL) << 8) | \ | |
76 | (((uint64_t)(x) & 0x000000FF00000000ULL) >> 8) | \ | |
77 | (((uint64_t)(x) & 0x0000FF0000000000ULL) >> 24) | \ | |
78 | (((uint64_t)(x) & 0x00FF000000000000ULL) >> 40) | \ | |
79 | (((uint64_t)(x) & 0xFF00000000000000ULL) >> 56))) | |
1a1eb4e1 KZ |
80 | #endif |
81 | ||
82 | #ifndef htobe16 | |
83 | # if !defined(WORDS_BIGENDIAN) | |
84 | # define htobe16(x) bswap_16 (x) | |
85 | # define htole16(x) (x) | |
86 | # define be16toh(x) bswap_16 (x) | |
87 | # define le16toh(x) (x) | |
88 | # define htobe32(x) bswap_32 (x) | |
89 | # define htole32(x) (x) | |
90 | # define be32toh(x) bswap_32 (x) | |
91 | # define le32toh(x) (x) | |
92 | # define htobe64(x) bswap_64 (x) | |
93 | # define htole64(x) (x) | |
94 | # define be64toh(x) bswap_64 (x) | |
95 | # define le64toh(x) (x) | |
96 | # else | |
97 | # define htobe16(x) (x) | |
98 | # define htole16(x) bswap_16 (x) | |
99 | # define be16toh(x) (x) | |
100 | # define le16toh(x) bswap_16 (x) | |
101 | # define htobe32(x) (x) | |
102 | # define htole32(x) bswap_32 (x) | |
103 | # define be32toh(x) (x) | |
104 | # define le32toh(x) bswap_32 (x) | |
105 | # define htobe64(x) (x) | |
106 | # define htole64(x) bswap_64 (x) | |
107 | # define be64toh(x) (x) | |
108 | # define le64toh(x) bswap_64 (x) | |
109 | # endif | |
110 | #endif | |
e98754d6 | 111 | |
1a1eb4e1 KZ |
112 | /* |
113 | * Byte swab macros (based on linux/byteorder/swab.h) | |
114 | */ | |
115 | #define swab16(x) bswap_16(x) | |
116 | #define swab32(x) bswap_32(x) | |
117 | #define swab64(x) bswap_64(x) | |
118 | ||
119 | #define cpu_to_le16(x) ((uint16_t) htole16(x)) | |
120 | #define cpu_to_le32(x) ((uint32_t) htole32(x)) | |
121 | #define cpu_to_le64(x) ((uint64_t) htole64(x)) | |
122 | ||
123 | #define cpu_to_be16(x) ((uint16_t) htobe16(x)) | |
124 | #define cpu_to_be32(x) ((uint32_t) htobe32(x)) | |
125 | #define cpu_to_be64(x) ((uint64_t) htobe64(x)) | |
126 | ||
127 | #define le16_to_cpu(x) ((uint16_t) le16toh(x)) | |
128 | #define le32_to_cpu(x) ((uint32_t) le32toh(x)) | |
129 | #define le64_to_cpu(x) ((uint64_t) le64toh(x)) | |
130 | ||
131 | #define be16_to_cpu(x) ((uint16_t) be16toh(x)) | |
132 | #define be32_to_cpu(x) ((uint32_t) be32toh(x)) | |
133 | #define be64_to_cpu(x) ((uint64_t) be64toh(x)) | |
134 | ||
135 | /* | |
136 | * Bit map related macros. Usually provided by libc. | |
137 | */ | |
e98754d6 KZ |
138 | #ifndef NBBY |
139 | # define NBBY CHAR_BIT | |
140 | #endif | |
141 | ||
142 | #ifndef setbit | |
143 | # define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) | |
144 | # define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) | |
145 | # define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) | |
146 | # define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) | |
147 | #endif | |
148 | ||
1ed3367f KZ |
149 | #endif /* BITOPS_H */ |
150 |