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 52 static inline uint16_t bswap16(uint16_t x) 53 { 54 return bswap_16(x); 55 } 56 57 static inline uint32_t bswap32(uint32_t x) 58 { 59 return bswap_32(x); 60 } 61 62 static inline uint64_t bswap64(uint64_t x) 63 { 64 return bswap_64(x); 65 } 66 67 #endif /* ! HAVE_MACHINE_BSWAP_H */ 68 69 static inline void bswap16s(uint16_t *s) 70 { 71 *s = bswap16(*s); 72 } 73 74 static inline void bswap32s(uint32_t *s) 75 { 76 *s = bswap32(*s); 77 } 78 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
