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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 | ||
a38d1f69 WL |
23 | #if !(defined(HAVE_BYTESWAP_H) && defined(HAVE_ENDIAN_H)) |
24 | /* | |
25 | * When both byteswap.h and endian.h are preseent, the proper macros are defined | |
26 | * as those files are glibc compatible. Otherwise, compensate for the slightly | |
27 | * different interfaces between the different BSDs. | |
28 | */ | |
1a1eb4e1 KZ |
29 | #if defined(__OpenBSD__) |
30 | # include <sys/types.h> | |
31 | # define be16toh(x) betoh16(x) | |
32 | # define be32toh(x) betoh32(x) | |
33 | # define be64toh(x) betoh64(x) | |
214e668c | 34 | #elif defined(__NetBSD__) || defined(__DragonFly__) |
d20eb029 RM |
35 | # define bswap_16(x) bswap16(x) |
36 | # define bswap_32(x) bswap32(x) | |
37 | # define bswap_64(x) bswap64(x) | |
38 | #elif defined(__APPLE__) | |
39 | # include <libkern/OSByteOrder.h> | |
40 | # define htobe16(x) OSSwapHostToBigInt16(x) | |
41 | # define htole16(x) OSSwapHostToLittleInt16(x) | |
42 | # define be16toh(x) OSSwapBigToHostInt16(x) | |
43 | # define le16toh(x) OSSwapLittleToHostInt16(x) | |
44 | # define htobe32(x) OSSwapHostToBigInt32(x) | |
45 | # define htole32(x) OSSwapHostToLittleInt32(x) | |
46 | # define be32toh(x) OSSwapBigToHostInt32(x) | |
47 | # define le32toh(x) OSSwapLittleToHostInt32(x) | |
48 | # define htobe64(x) OSSwapHostToBigInt64(x) | |
49 | # define htole64(x) OSSwapHostToLittleInt64(x) | |
50 | # define be64toh(x) OSSwapBigToHostInt64(x) | |
51 | # define le64toh(x) OSSwapLittleToHostInt64(x) | |
52 | # define bswap_16(x) OSSwapInt16(x) | |
53 | # define bswap_32(x) OSSwapInt32(x) | |
54 | # define bswap_64(x) OSSwapInt64(x) | |
1a1eb4e1 | 55 | #endif |
a38d1f69 | 56 | #endif |
1ed3367f | 57 | |
e98754d6 | 58 | /* |
1a1eb4e1 | 59 | * Fallbacks |
d01c0adb RM |
60 | * casts are necessary for constants, because we never know how for sure |
61 | * how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way. | |
e98754d6 | 62 | */ |
1a1eb4e1 | 63 | #ifndef bswap_16 |
d01c0adb RM |
64 | # define bswap_16(x) ((uint16_t)( \ |
65 | (((uint16_t)(x) & 0x00FF) << 8) | \ | |
66 | (((uint16_t)(x) & 0xFF00) >> 8))) | |
1a1eb4e1 KZ |
67 | #endif |
68 | ||
69 | #ifndef bswap_32 | |
d01c0adb RM |
70 | # define bswap_32(x) ((uint32_t)( \ |
71 | (((uint32_t)(x) & 0x000000FF) << 24) | \ | |
72 | (((uint32_t)(x) & 0x0000FF00) << 8) | \ | |
73 | (((uint32_t)(x) & 0x00FF0000) >> 8) | \ | |
74 | (((uint32_t)(x) & 0xFF000000) >> 24))) | |
1a1eb4e1 KZ |
75 | #endif |
76 | ||
77 | #ifndef bswap_64 | |
d01c0adb RM |
78 | # define bswap_64(x) ((uint64_t)( \ |
79 | (((uint64_t)(x) & 0x00000000000000FFULL) << 56) | \ | |
80 | (((uint64_t)(x) & 0x000000000000FF00ULL) << 40) | \ | |
81 | (((uint64_t)(x) & 0x0000000000FF0000ULL) << 24) | \ | |
82 | (((uint64_t)(x) & 0x00000000FF000000ULL) << 8) | \ | |
83 | (((uint64_t)(x) & 0x000000FF00000000ULL) >> 8) | \ | |
84 | (((uint64_t)(x) & 0x0000FF0000000000ULL) >> 24) | \ | |
85 | (((uint64_t)(x) & 0x00FF000000000000ULL) >> 40) | \ | |
86 | (((uint64_t)(x) & 0xFF00000000000000ULL) >> 56))) | |
1a1eb4e1 KZ |
87 | #endif |
88 | ||
89 | #ifndef htobe16 | |
83b418c1 | 90 | # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
1a1eb4e1 KZ |
91 | # define htobe16(x) bswap_16 (x) |
92 | # define htole16(x) (x) | |
93 | # define be16toh(x) bswap_16 (x) | |
94 | # define le16toh(x) (x) | |
95 | # define htobe32(x) bswap_32 (x) | |
96 | # define htole32(x) (x) | |
97 | # define be32toh(x) bswap_32 (x) | |
98 | # define le32toh(x) (x) | |
99 | # define htobe64(x) bswap_64 (x) | |
100 | # define htole64(x) (x) | |
101 | # define be64toh(x) bswap_64 (x) | |
102 | # define le64toh(x) (x) | |
103 | # else | |
104 | # define htobe16(x) (x) | |
105 | # define htole16(x) bswap_16 (x) | |
106 | # define be16toh(x) (x) | |
107 | # define le16toh(x) bswap_16 (x) | |
108 | # define htobe32(x) (x) | |
109 | # define htole32(x) bswap_32 (x) | |
110 | # define be32toh(x) (x) | |
111 | # define le32toh(x) bswap_32 (x) | |
112 | # define htobe64(x) (x) | |
113 | # define htole64(x) bswap_64 (x) | |
114 | # define be64toh(x) (x) | |
115 | # define le64toh(x) bswap_64 (x) | |
116 | # endif | |
117 | #endif | |
e98754d6 | 118 | |
1a1eb4e1 KZ |
119 | /* |
120 | * Byte swab macros (based on linux/byteorder/swab.h) | |
121 | */ | |
122 | #define swab16(x) bswap_16(x) | |
123 | #define swab32(x) bswap_32(x) | |
124 | #define swab64(x) bswap_64(x) | |
125 | ||
126 | #define cpu_to_le16(x) ((uint16_t) htole16(x)) | |
127 | #define cpu_to_le32(x) ((uint32_t) htole32(x)) | |
128 | #define cpu_to_le64(x) ((uint64_t) htole64(x)) | |
129 | ||
130 | #define cpu_to_be16(x) ((uint16_t) htobe16(x)) | |
131 | #define cpu_to_be32(x) ((uint32_t) htobe32(x)) | |
132 | #define cpu_to_be64(x) ((uint64_t) htobe64(x)) | |
133 | ||
134 | #define le16_to_cpu(x) ((uint16_t) le16toh(x)) | |
135 | #define le32_to_cpu(x) ((uint32_t) le32toh(x)) | |
136 | #define le64_to_cpu(x) ((uint64_t) le64toh(x)) | |
137 | ||
138 | #define be16_to_cpu(x) ((uint16_t) be16toh(x)) | |
139 | #define be32_to_cpu(x) ((uint32_t) be32toh(x)) | |
140 | #define be64_to_cpu(x) ((uint64_t) be64toh(x)) | |
141 | ||
142 | /* | |
143 | * Bit map related macros. Usually provided by libc. | |
144 | */ | |
e98754d6 KZ |
145 | #ifndef NBBY |
146 | # define NBBY CHAR_BIT | |
147 | #endif | |
148 | ||
149 | #ifndef setbit | |
150 | # define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) | |
151 | # define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) | |
152 | # define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) | |
153 | # define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) | |
154 | #endif | |
155 | ||
1ed3367f KZ |
156 | #endif /* BITOPS_H */ |
157 |