1 /* 2 * Copyright 2017 Haiku, Inc. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef _BSD_ENDIAN_H_ 6 #define _BSD_ENDIAN_H_ 7 8 9 #include_next <endian.h> 10 11 12 #ifdef _BSD_SOURCE 13 14 #include <config/HaikuConfig.h> 15 #include <support/ByteOrder.h> 16 #include <support/SupportDefs.h> 17 18 #ifdef __cplusplus 19 extern "C" { 20 #endif 21 22 /* 23 * General byte order swapping functions. 24 */ 25 #define bswap16(x) __swap_int16(x) 26 #define bswap32(x) __swap_int32(x) 27 #define bswap64(x) __swap_int64(x) 28 29 /* 30 * Host to big endian, host to little endian, big endian to host, and little 31 * endian to host byte order functions as detailed in byteorder(9). 32 */ 33 #if BYTE_ORDER == LITTLE_ENDIAN 34 #define htobe16(x) bswap16((x)) 35 #define htobe32(x) bswap32((x)) 36 #define htobe64(x) bswap64((x)) 37 #define htole16(x) ((uint16_t)(x)) 38 #define htole32(x) ((uint32_t)(x)) 39 #define htole64(x) ((uint64_t)(x)) 40 41 #define be16toh(x) bswap16((x)) 42 #define be32toh(x) bswap32((x)) 43 #define be64toh(x) bswap64((x)) 44 #define le16toh(x) ((uint16_t)(x)) 45 #define le32toh(x) ((uint32_t)(x)) 46 #define le64toh(x) ((uint64_t)(x)) 47 #else /* BYTE_ORDER != LITTLE_ENDIAN */ 48 #define htobe16(x) ((uint16_t)(x)) 49 #define htobe32(x) ((uint32_t)(x)) 50 #define htobe64(x) ((uint64_t)(x)) 51 #define htole16(x) bswap16((x)) 52 #define htole32(x) bswap32((x)) 53 #define htole64(x) bswap64((x)) 54 55 #define be16toh(x) ((uint16_t)(x)) 56 #define be32toh(x) ((uint32_t)(x)) 57 #define be64toh(x) ((uint64_t)(x)) 58 #define le16toh(x) bswap16((x)) 59 #define le32toh(x) bswap32((x)) 60 #define le64toh(x) bswap64((x)) 61 #endif /* BYTE_ORDER == LITTLE_ENDIAN */ 62 63 /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ 64 65 static __inline uint32_t 66 be32dec(const void *pp) 67 { 68 uint8_t const *p = (uint8_t const *)pp; 69 70 return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); 71 } 72 73 static __inline uint64_t 74 be64dec(const void *pp) 75 { 76 uint8_t const *p = (uint8_t const *)pp; 77 78 return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4)); 79 } 80 81 static __inline void 82 be32enc(void *pp, uint32_t u) 83 { 84 uint8_t *p = (uint8_t *)pp; 85 86 p[0] = (u >> 24) & 0xff; 87 p[1] = (u >> 16) & 0xff; 88 p[2] = (u >> 8) & 0xff; 89 p[3] = u & 0xff; 90 } 91 92 static __inline void 93 be64enc(void *pp, uint64_t u) 94 { 95 uint8_t *p = (uint8_t *)pp; 96 97 be32enc(p, (uint32_t)(u >> 32)); 98 be32enc(p + 4, (uint32_t)(u & 0xffffffffU)); 99 } 100 101 #ifdef __cplusplus 102 } 103 #endif 104 105 106 #endif 107 108 109 #endif /* _BSD_ENDIAN_H_ */ 110