1 /*- 2 * Copyright (c) 1997 Niklas Hallqvist. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #ifndef _SYS_ENDIAN_H_ 26 #define _SYS_ENDIAN_H_ 27 28 #include <sys/cdefs.h> 29 30 #include <stdint.h> 31 32 #define _LITTLE_ENDIAN 1234 33 #define _BIG_ENDIAN 4321 34 #define _PDP_ENDIAN 3412 35 #define _BYTE_ORDER _LITTLE_ENDIAN 36 #define __LITTLE_ENDIAN_BITFIELD 37 38 #ifndef __LITTLE_ENDIAN 39 #define __LITTLE_ENDIAN _LITTLE_ENDIAN 40 #endif 41 #ifndef __BIG_ENDIAN 42 #define __BIG_ENDIAN _BIG_ENDIAN 43 #endif 44 #define __BYTE_ORDER _BYTE_ORDER 45 46 #define __swap16 __builtin_bswap16 47 #define __swap32 __builtin_bswap32 48 #define __swap64(x) __BIONIC_CAST(static_cast,uint64_t,__builtin_bswap64(x)) 49 50 /* glibc compatibility. */ 51 __BEGIN_DECLS 52 uint32_t htonl(uint32_t __x) __attribute_const__ __INTRODUCED_IN(21); 53 uint16_t htons(uint16_t __x) __attribute_const__ __INTRODUCED_IN(21); 54 uint32_t ntohl(uint32_t __x) __attribute_const__ __INTRODUCED_IN(21); 55 uint16_t ntohs(uint16_t __x) __attribute_const__ __INTRODUCED_IN(21); 56 __END_DECLS 57 58 #define htonl(x) __swap32(x) 59 #define htons(x) __swap16(x) 60 #define ntohl(x) __swap32(x) 61 #define ntohs(x) __swap16(x) 62 63 /* Bionic additions */ 64 #define htonq(x) __swap64(x) 65 #define ntohq(x) __swap64(x) 66 67 #if defined(__USE_BSD) || defined(__BIONIC__) /* Historically bionic exposed these. */ 68 #define LITTLE_ENDIAN _LITTLE_ENDIAN 69 #define BIG_ENDIAN _BIG_ENDIAN 70 #define PDP_ENDIAN _PDP_ENDIAN 71 #define BYTE_ORDER _BYTE_ORDER 72 73 #define NTOHL(x) (x) = ntohl(__BIONIC_CAST(static_cast,u_int32_t,(x))) 74 #define NTOHS(x) (x) = ntohs(__BIONIC_CAST(static_cast,u_int16_t,(x))) 75 #define HTONL(x) (x) = htonl(__BIONIC_CAST(static_cast,u_int32_t,(x))) 76 #define HTONS(x) (x) = htons(__BIONIC_CAST(static_cast,u_int16_t,(x))) 77 78 #define htobe16(x) __swap16(x) 79 #define htobe32(x) __swap32(x) 80 #define htobe64(x) __swap64(x) 81 #define betoh16(x) __swap16(x) 82 #define betoh32(x) __swap32(x) 83 #define betoh64(x) __swap64(x) 84 85 #define htole16(x) (x) 86 #define htole32(x) (x) 87 #define htole64(x) (x) 88 #define letoh16(x) (x) 89 #define letoh32(x) (x) 90 #define letoh64(x) (x) 91 92 /* 93 * glibc-compatible beXXtoh/leXXtoh synonyms for htobeXX/htoleXX. 94 * The BSDs export both sets of names, bionic historically only 95 * exported the ones above (or on the rhs here), and glibc only 96 * exports these names (on the lhs). 97 */ 98 #define be16toh(x) htobe16(x) 99 #define be32toh(x) htobe32(x) 100 #define be64toh(x) htobe64(x) 101 #define le16toh(x) htole16(x) 102 #define le32toh(x) htole32(x) 103 #define le64toh(x) htole64(x) 104 105 #endif 106 107 #endif 108