| 1 | #ifndef _SYSENDIAN_H_ |
| 2 | #define _SYSENDIAN_H_ |
| 3 | |
| 4 | #include <stdint.h> |
| 5 | |
| 6 | /* Avoid namespace collisions with BSD <sys/endian.h>. */ |
| 7 | #define be16dec libcperciva_be16dec |
| 8 | #define be16enc libcperciva_be16enc |
| 9 | #define be32dec libcperciva_be32dec |
| 10 | #define be32enc libcperciva_be32enc |
| 11 | #define be64dec libcperciva_be64dec |
| 12 | #define be64enc libcperciva_be64enc |
| 13 | #define le16dec libcperciva_le16dec |
| 14 | #define le16enc libcperciva_le16enc |
| 15 | #define le32dec libcperciva_le32dec |
| 16 | #define le32enc libcperciva_le32enc |
| 17 | #define le64dec libcperciva_le64dec |
| 18 | #define le64enc libcperciva_le64enc |
| 19 | |
| 20 | static inline uint16_t |
| 21 | be16dec(const void * pp) |
| 22 | { |
| 23 | const uint8_t * p = (uint8_t const *)pp; |
| 24 | |
| 25 | return (uint16_t)((uint16_t)(p[1]) + ((uint16_t)(p[0]) << 8)); |
| 26 | } |
| 27 | |
| 28 | static inline void |
| 29 | be16enc(void * pp, uint16_t x) |
| 30 | { |
| 31 | uint8_t * p = (uint8_t *)pp; |
| 32 | |
| 33 | p[1] = x & 0xff; |
| 34 | p[0] = (x >> 8) & 0xff; |
| 35 | } |
| 36 | |
| 37 | static inline uint32_t |
| 38 | be32dec(const void * pp) |
| 39 | { |
| 40 | const uint8_t * p = (uint8_t const *)pp; |
| 41 | |
| 42 | return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) + |
| 43 | ((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24)); |
| 44 | } |
| 45 | |
| 46 | static inline void |
| 47 | be32enc(void * pp, uint32_t x) |
| 48 | { |
| 49 | uint8_t * p = (uint8_t *)pp; |
| 50 | |
| 51 | p[3] = x & 0xff; |
| 52 | p[2] = (x >> 8) & 0xff; |
| 53 | p[1] = (x >> 16) & 0xff; |
| 54 | p[0] = (x >> 24) & 0xff; |
| 55 | } |
| 56 | |
| 57 | static inline uint64_t |
| 58 | be64dec(const void * pp) |
| 59 | { |
| 60 | const uint8_t * p = (uint8_t const *)pp; |
| 61 | |
| 62 | return ((uint64_t)(p[7]) + ((uint64_t)(p[6]) << 8) + |
| 63 | ((uint64_t)(p[5]) << 16) + ((uint64_t)(p[4]) << 24) + |
| 64 | ((uint64_t)(p[3]) << 32) + ((uint64_t)(p[2]) << 40) + |
| 65 | ((uint64_t)(p[1]) << 48) + ((uint64_t)(p[0]) << 56)); |
| 66 | } |
| 67 | |
| 68 | static inline void |
| 69 | be64enc(void * pp, uint64_t x) |
| 70 | { |
| 71 | uint8_t * p = (uint8_t *)pp; |
| 72 | |
| 73 | p[7] = x & 0xff; |
| 74 | p[6] = (x >> 8) & 0xff; |
| 75 | p[5] = (x >> 16) & 0xff; |
| 76 | p[4] = (x >> 24) & 0xff; |
| 77 | p[3] = (x >> 32) & 0xff; |
| 78 | p[2] = (x >> 40) & 0xff; |
| 79 | p[1] = (x >> 48) & 0xff; |
| 80 | p[0] = (x >> 56) & 0xff; |
| 81 | } |
| 82 | |
| 83 | static inline uint16_t |
| 84 | le16dec(const void * pp) |
| 85 | { |
| 86 | const uint8_t * p = (uint8_t const *)pp; |
| 87 | |
| 88 | return (uint16_t)((uint16_t)(p[0]) + ((uint16_t)(p[1]) << 8)); |
| 89 | } |
| 90 | |
| 91 | static inline void |
| 92 | le16enc(void * pp, uint16_t x) |
| 93 | { |
| 94 | uint8_t * p = (uint8_t *)pp; |
| 95 | |
| 96 | p[0] = x & 0xff; |
| 97 | p[1] = (x >> 8) & 0xff; |
| 98 | } |
| 99 | |
| 100 | static inline uint32_t |
| 101 | le32dec(const void * pp) |
| 102 | { |
| 103 | const uint8_t * p = (uint8_t const *)pp; |
| 104 | |
| 105 | return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) + |
| 106 | ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24)); |
| 107 | } |
| 108 | |
| 109 | static inline void |
| 110 | le32enc(void * pp, uint32_t x) |
| 111 | { |
| 112 | uint8_t * p = (uint8_t *)pp; |
| 113 | |
| 114 | p[0] = x & 0xff; |
| 115 | p[1] = (x >> 8) & 0xff; |
| 116 | p[2] = (x >> 16) & 0xff; |
| 117 | p[3] = (x >> 24) & 0xff; |
| 118 | } |
| 119 | |
| 120 | static inline uint64_t |
| 121 | le64dec(const void * pp) |
| 122 | { |
| 123 | const uint8_t * p = (uint8_t const *)pp; |
| 124 | |
| 125 | return ((uint64_t)(p[0]) + ((uint64_t)(p[1]) << 8) + |
| 126 | ((uint64_t)(p[2]) << 16) + ((uint64_t)(p[3]) << 24) + |
| 127 | ((uint64_t)(p[4]) << 32) + ((uint64_t)(p[5]) << 40) + |
| 128 | ((uint64_t)(p[6]) << 48) + ((uint64_t)(p[7]) << 56)); |
| 129 | } |
| 130 | |
| 131 | static inline void |
| 132 | le64enc(void * pp, uint64_t x) |
| 133 | { |
| 134 | uint8_t * p = (uint8_t *)pp; |
| 135 | |
| 136 | p[0] = x & 0xff; |
| 137 | p[1] = (x >> 8) & 0xff; |
| 138 | p[2] = (x >> 16) & 0xff; |
| 139 | p[3] = (x >> 24) & 0xff; |
| 140 | p[4] = (x >> 32) & 0xff; |
| 141 | p[5] = (x >> 40) & 0xff; |
| 142 | p[6] = (x >> 48) & 0xff; |
| 143 | p[7] = (x >> 56) & 0xff; |
| 144 | } |
| 145 | |
| 146 | #endif /* !_SYSENDIAN_H_ */ |