1 #ifndef BSWAP_H
2 #define BSWAP_H
3
4 #include "config-host.h"
5
6 #include <inttypes.h>
7
8 #ifdef HAVE_MACHINE_BSWAP_H
9 #include <sys/endian.h>
10 #include <sys/types.h>
11 #include <machine/bswap.h>
12 #else
13
14 #ifdef HAVE_BYTESWAP_H
15 #include <byteswap.h>
16 #else
17
18 #define bswap_16(x) \
19 ({ \
20 uint16_t __x = (x); \
21 ((uint16_t)( \
22 (((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
23 (((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
24 })
25
26 #define bswap_32(x) \
27 ({ \
28 uint32_t __x = (x); \
29 ((uint32_t)( \
30 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
31 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
32 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
33 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
34 })
35
36 #define bswap_64(x) \
37 ({ \
38 uint64_t __x = (x); \
39 ((uint64_t)( \
40 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
41 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
42 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
43 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
44 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
45 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
46 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
47 (uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
48 })
49
50 #endif /* !HAVE_BYTESWAP_H */
51
bswap16(uint16_t x)52 static inline uint16_t bswap16(uint16_t x)
53 {
54 return bswap_16(x);
55 }
56
bswap32(uint32_t x)57 static inline uint32_t bswap32(uint32_t x)
58 {
59 return bswap_32(x);
60 }
61
bswap64(uint64_t x)62 static inline uint64_t bswap64(uint64_t x)
63 {
64 return bswap_64(x);
65 }
66
67 #endif /* ! HAVE_MACHINE_BSWAP_H */
68
bswap16s(uint16_t * s)69 static inline void bswap16s(uint16_t *s)
70 {
71 *s = bswap16(*s);
72 }
73
bswap32s(uint32_t * s)74 static inline void bswap32s(uint32_t *s)
75 {
76 *s = bswap32(*s);
77 }
78
bswap64s(uint64_t * s)79 static inline void bswap64s(uint64_t *s)
80 {
81 *s = bswap64(*s);
82 }
83
84 #if defined(WORDS_BIGENDIAN)
85 #define be_bswap(v, size) (v)
86 #define le_bswap(v, size) bswap ## size(v)
87 #define be_bswaps(v, size)
88 #define le_bswaps(p, size) *p = bswap ## size(*p);
89 #else
90 #define le_bswap(v, size) (v)
91 #define be_bswap(v, size) bswap ## size(v)
92 #define le_bswaps(v, size)
93 #define be_bswaps(p, size) *p = bswap ## size(*p);
94 #endif
95
96 #define CPU_CONVERT(endian, size, type)\
97 static inline type endian ## size ## _to_cpu(type v)\
98 {\
99 return endian ## _bswap(v, size);\
100 }\
101 \
102 static inline type cpu_to_ ## endian ## size(type v)\
103 {\
104 return endian ## _bswap(v, size);\
105 }\
106 \
107 static inline void endian ## size ## _to_cpus(type *p)\
108 {\
109 endian ## _bswaps(p, size)\
110 }\
111 \
112 static inline void cpu_to_ ## endian ## size ## s(type *p)\
113 {\
114 endian ## _bswaps(p, size)\
115 }\
116 \
117 static inline type endian ## size ## _to_cpup(const type *p)\
118 {\
119 return endian ## size ## _to_cpu(*p);\
120 }\
121 \
122 static inline void cpu_to_ ## endian ## size ## w(type *p, type v)\
123 {\
124 *p = cpu_to_ ## endian ## size(v);\
125 }
126
127 CPU_CONVERT(be, 16, uint16_t)
128 CPU_CONVERT(be, 32, uint32_t)
129 CPU_CONVERT(be, 64, uint64_t)
130
131 CPU_CONVERT(le, 16, uint16_t)
132 CPU_CONVERT(le, 32, uint32_t)
133 CPU_CONVERT(le, 64, uint64_t)
134
135 /* unaligned versions (optimized for frequent unaligned accesses)*/
136
137 #if defined(__i386__) || defined(_ARCH_PPC)
138
139 #define cpu_to_le16wu(p, v) cpu_to_le16w(p, v)
140 #define cpu_to_le32wu(p, v) cpu_to_le32w(p, v)
141 #define le16_to_cpupu(p) le16_to_cpup(p)
142 #define le32_to_cpupu(p) le32_to_cpup(p)
143 #define be32_to_cpupu(p) be32_to_cpup(p)
144
145 #define cpu_to_be16wu(p, v) cpu_to_be16w(p, v)
146 #define cpu_to_be32wu(p, v) cpu_to_be32w(p, v)
147
148 #else
149
150 static inline void cpu_to_le16wu(uint16_t *p, uint16_t v)
151 {
152 uint8_t *p1 = (uint8_t *)p;
153
154 p1[0] = v & 0xff;
155 p1[1] = v >> 8;
156 }
157
158 static inline void cpu_to_le32wu(uint32_t *p, uint32_t v)
159 {
160 uint8_t *p1 = (uint8_t *)p;
161
162 p1[0] = v & 0xff;
163 p1[1] = v >> 8;
164 p1[2] = v >> 16;
165 p1[3] = v >> 24;
166 }
167
168 static inline uint16_t le16_to_cpupu(const uint16_t *p)
169 {
170 const uint8_t *p1 = (const uint8_t *)p;
171 return p1[0] | (p1[1] << 8);
172 }
173
174 static inline uint32_t le32_to_cpupu(const uint32_t *p)
175 {
176 const uint8_t *p1 = (const uint8_t *)p;
177 return p1[0] | (p1[1] << 8) | (p1[2] << 16) | (p1[3] << 24);
178 }
179
180 static inline uint32_t be32_to_cpupu(const uint32_t *p)
181 {
182 const uint8_t *p1 = (const uint8_t *)p;
183 return p1[3] | (p1[2] << 8) | (p1[1] << 16) | (p1[0] << 24);
184 }
185
186 static inline void cpu_to_be16wu(uint16_t *p, uint16_t v)
187 {
188 uint8_t *p1 = (uint8_t *)p;
189
190 p1[0] = v >> 8;
191 p1[1] = v & 0xff;
192 }
193
194 static inline void cpu_to_be32wu(uint32_t *p, uint32_t v)
195 {
196 uint8_t *p1 = (uint8_t *)p;
197
198 p1[0] = v >> 24;
199 p1[1] = v >> 16;
200 p1[2] = v >> 8;
201 p1[3] = v & 0xff;
202 }
203
204 #endif
205
206 #ifdef WORDS_BIGENDIAN
207 #define cpu_to_32wu cpu_to_be32wu
208 #else
209 #define cpu_to_32wu cpu_to_le32wu
210 #endif
211
212 #undef le_bswap
213 #undef be_bswap
214 #undef le_bswaps
215 #undef be_bswaps
216
217 #endif /* BSWAP_H */
218