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#include <features.h> 11 12 13#ifdef _DEFAULT_SOURCE 14 15#include <config/HaikuConfig.h> 16#include <support/ByteOrder.h> 17#include <support/SupportDefs.h> 18 19#ifdef __cplusplus 20extern "C" { 21#endif 22 23/* 24 * General byte order swapping functions. 25 */ 26#define bswap16(x) __swap_int16(x) 27#define bswap32(x) __swap_int32(x) 28#define bswap64(x) __swap_int64(x) 29 30/* 31 * Host to big endian, host to little endian, big endian to host, and little 32 * endian to host byte order functions as detailed in byteorder(9). 33 */ 34#if BYTE_ORDER == LITTLE_ENDIAN 35#define htobe16(x) bswap16((x)) 36#define htobe32(x) bswap32((x)) 37#define htobe64(x) bswap64((x)) 38#define htole16(x) ((uint16_t)(x)) 39#define htole32(x) ((uint32_t)(x)) 40#define htole64(x) ((uint64_t)(x)) 41 42#define be16toh(x) bswap16((x)) 43#define be32toh(x) bswap32((x)) 44#define be64toh(x) bswap64((x)) 45#define le16toh(x) ((uint16_t)(x)) 46#define le32toh(x) ((uint32_t)(x)) 47#define le64toh(x) ((uint64_t)(x)) 48#else /* BYTE_ORDER != LITTLE_ENDIAN */ 49#define htobe16(x) ((uint16_t)(x)) 50#define htobe32(x) ((uint32_t)(x)) 51#define htobe64(x) ((uint64_t)(x)) 52#define htole16(x) bswap16((x)) 53#define htole32(x) bswap32((x)) 54#define htole64(x) bswap64((x)) 55 56#define be16toh(x) ((uint16_t)(x)) 57#define be32toh(x) ((uint32_t)(x)) 58#define be64toh(x) ((uint64_t)(x)) 59#define le16toh(x) bswap16((x)) 60#define le32toh(x) bswap32((x)) 61#define le64toh(x) bswap64((x)) 62#endif /* BYTE_ORDER == LITTLE_ENDIAN */ 63 64/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ 65 66static __inline uint32_t 67be32dec(const void *pp) 68{ 69 uint8_t const *p = (uint8_t const *)pp; 70 71 return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); 72} 73 74static __inline uint64_t 75be64dec(const void *pp) 76{ 77 uint8_t const *p = (uint8_t const *)pp; 78 79 return (((uint64_t)be32dec(p) << 32) | be32dec(p + 4)); 80} 81 82static __inline void 83be32enc(void *pp, uint32_t u) 84{ 85 uint8_t *p = (uint8_t *)pp; 86 87 p[0] = (u >> 24) & 0xff; 88 p[1] = (u >> 16) & 0xff; 89 p[2] = (u >> 8) & 0xff; 90 p[3] = u & 0xff; 91} 92 93static __inline void 94be64enc(void *pp, uint64_t u) 95{ 96 uint8_t *p = (uint8_t *)pp; 97 98 be32enc(p, (uint32_t)(u >> 32)); 99 be32enc(p + 4, (uint32_t)(u & 0xffffffffU)); 100} 101 102#ifdef __cplusplus 103} 104#endif 105 106 107#endif 108 109 110#endif /* _BSD_ENDIAN_H_ */ 111