n2n-3.1.1.tar.gz: n2n-3.1.1/include/portable_endian.h

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1 /** 2 * (C) 2007-22 - ntop.org and contributors 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 3 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not see see <http://www.gnu.org/licenses/> 16 * 17 */ 18 19 20 // taken from 21 // https://raw.githubusercontent.com/pyca/bcrypt/master/src/_csrc/portable_endian.h 22 // as of June 11, 2020 23 24 // "License": Public Domain 25 // I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like. 26 // In case there are jurisdictions that don't support putting things in the public domain you can also consider it to 27 // be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it 28 // an example on how to get the endian conversion functions on different platforms. 29 30 #ifndef PORTABLE_ENDIAN_H__ 31 #define PORTABLE_ENDIAN_H__ 32 33 #if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__) 34 35 # define __WINDOWS__ 36 37 #endif 38 39 #if defined(__linux__) || defined(__CYGWIN__) 40 /* Define necessary macros for the header to expose all fields. */ 41 # if !defined(_BSD_SOURCE) 42 # define _BSD_SOURCE 43 # endif 44 # if !defined(__USE_BSD) 45 # define __USE_BSD 46 # endif 47 # if !defined(_DEFAULT_SOURCE) 48 # define _DEFAULT_SOURCE 49 # endif 50 # include <endian.h> 51 # include <features.h> 52 /* See http://linux.die.net/man/3/endian */ 53 # if defined(htobe16) && defined(htole16) && defined(be16toh) && defined(le16toh) && defined(htobe32) && defined(htole32) && defined(be32toh) && defined(htole32) && defined(htobe64) && defined(htole64) && defined(htobe64) && defined(be64toh) && defined(htole64) && defined(le64toh) 54 /* Do nothing. The macros we need already exist. */ 55 # elif !defined(__GLIBC__) || !defined(__GLIBC_MINOR__) || ((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 9))) 56 # include <arpa/inet.h> 57 # if defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN) 58 # define htobe16(x) htons(x) 59 # define htole16(x) (x) 60 # define be16toh(x) ntohs(x) 61 # define le16toh(x) (x) 62 63 # define htobe32(x) htonl(x) 64 # define htole32(x) (x) 65 # define be32toh(x) ntohl(x) 66 # define le32toh(x) (x) 67 68 # define htobe64(x) (((uint64_t)htonl(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)htonl(((uint32_t)(x)))) << 32)) 69 # define htole64(x) (x) 70 # define be64toh(x) (((uint64_t)ntohl(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)ntohl(((uint32_t)(x)))) << 32)) 71 # define le64toh(x) (x) 72 # elif defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN) 73 # define htobe16(x) (x) 74 # define htole16(x) (((((uint16_t)(x)) >> 8))|((((uint16_t)(x)) << 8))) 75 # define be16toh(x) (x) 76 # define le16toh(x) (((((uint16_t)(x)) >> 8))|((((uint16_t)(x)) << 8))) 77 78 # define htobe32(x) (x) 79 # define htole32(x) (((uint32_t)htole16(((uint16_t)(((uint32_t)(x)) >> 16)))) | (((uint32_t)htole16(((uint16_t)(x)))) << 16)) 80 # define be32toh(x) (x) 81 # define le32toh(x) (((uint32_t)le16toh(((uint16_t)(((uint32_t)(x)) >> 16)))) | (((uint32_t)le16toh(((uint16_t)(x)))) << 16)) 82 83 # define htobe64(x) (x) 84 # define htole64(x) (((uint64_t)htole32(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)htole32(((uint32_t)(x)))) << 32)) 85 # define be64toh(x) (x) 86 # define le64toh(x) (((uint64_t)le32toh(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)le32toh(((uint32_t)(x)))) << 32)) 87 # else 88 # error Byte Order not supported or not defined. 89 # endif 90 # endif 91 92 #elif defined(__APPLE__) 93 94 # include <libkern/OSByteOrder.h> 95 96 # define htobe16(x) OSSwapHostToBigInt16(x) 97 # define htole16(x) OSSwapHostToLittleInt16(x) 98 # define be16toh(x) OSSwapBigToHostInt16(x) 99 # define le16toh(x) OSSwapLittleToHostInt16(x) 100 101 # define htobe32(x) OSSwapHostToBigInt32(x) 102 # define htole32(x) OSSwapHostToLittleInt32(x) 103 # define be32toh(x) OSSwapBigToHostInt32(x) 104 # define le32toh(x) OSSwapLittleToHostInt32(x) 105 106 # define htobe64(x) OSSwapHostToBigInt64(x) 107 # define htole64(x) OSSwapHostToLittleInt64(x) 108 # define be64toh(x) OSSwapBigToHostInt64(x) 109 # define le64toh(x) OSSwapLittleToHostInt64(x) 110 111 # define __BYTE_ORDER BYTE_ORDER 112 # define __BIG_ENDIAN BIG_ENDIAN 113 # define __LITTLE_ENDIAN LITTLE_ENDIAN 114 # define __PDP_ENDIAN PDP_ENDIAN 115 116 #elif defined(__OpenBSD__) 117 118 # include <sys/endian.h> 119 120 #elif defined(__HAIKU__) 121 122 # include <endian.h> 123 124 #elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) 125 126 # include <sys/endian.h> 127 128 # if !defined(be16toh) 129 # define be16toh(x) betoh16(x) 130 # define le16toh(x) letoh16(x) 131 # endif 132 133 # if !defined(be32toh) 134 # define be32toh(x) betoh32(x) 135 # define le32toh(x) letoh32(x) 136 # endif 137 138 # if !defined(be64toh) 139 # define be64toh(x) betoh64(x) 140 # define le64toh(x) letoh64(x) 141 # endif 142 143 #elif defined(__WINDOWS__) 144 145 # if BYTE_ORDER == LITTLE_ENDIAN 146 147 # define htobe16(x) _byteswap_ushort(x) 148 # define htole16(x) (x) 149 # define be16toh(x) _byteswap_ushort(x) 150 # define le16toh(x) (x) 151 152 # define htobe32(x) _byteswap_ulong(x) 153 # define htole32(x) (x) 154 # define be32toh(x) _byteswap_ulong(x) 155 # define le32toh(x) (x) 156 157 # define htobe64(x) (((uint64_t)htobe32(((uint32_t)(((uint64_t)(x)) >> 32))) & 0x00000000FFFFFFFFULL) | (((uint64_t)htobe32(((uint32_t)(x)))) << 32)) 158 # define be64toh(x) (((uint64_t)be32toh(((uint32_t)(((uint64_t)(x)) >> 32))) & 0x00000000FFFFFFFFULL) | (((uint64_t)be32toh(((uint32_t)(x)))) << 32)) 159 # define htole64(x) (x) 160 # define le64toh(x) (x) 161 162 # elif BYTE_ORDER == BIG_ENDIAN 163 164 /* that would be xbox 360 */ 165 # define htobe16(x) (x) 166 # define htole16(x) __builtin_bswap16(x) 167 # define be16toh(x) (x) 168 # define le16toh(x) __builtin_bswap16(x) 169 170 # define htobe32(x) (x) 171 # define htole32(x) __builtin_bswap32(x) 172 # define be32toh(x) (x) 173 # define le32toh(x) __builtin_bswap32(x) 174 175 # define htobe64(x) (x) 176 # define htole64(x) __builtin_bswap64(x) 177 # define be64toh(x) (x) 178 # define le64toh(x) __builtin_bswap64(x) 179 180 # else 181 182 # error byte order not supported 183 184 # endif 185 186 # define __BYTE_ORDER BYTE_ORDER 187 # define __BIG_ENDIAN BIG_ENDIAN 188 # define __LITTLE_ENDIAN LITTLE_ENDIAN 189 # define __PDP_ENDIAN PDP_ENDIAN 190 191 #elif defined(__sun) 192 193 # include <sys/byteorder.h> 194 195 # define htobe16(x) BE_16(x) 196 # define htole16(x) LE_16(x) 197 # define be16toh(x) BE_16(x) 198 # define le16toh(x) LE_16(x) 199 200 # define htobe32(x) BE_32(x) 201 # define htole32(x) LE_32(x) 202 # define be32toh(x) BE_32(x) 203 # define le32toh(x) LE_32(x) 204 205 # define htobe64(x) BE_64(x) 206 # define htole64(x) LE_64(x) 207 # define be64toh(x) BE_64(x) 208 # define le64toh(x) LE_64(x) 209 210 #elif defined _AIX /* AIX is always big endian */ 211 # define be64toh(x) (x) 212 # define be32toh(x) (x) 213 # define be16toh(x) (x) 214 # define le32toh(x) \ 215 ((((x) & 0xff) << 24) | \ 216 (((x) & 0xff00) << 8) | \ 217 (((x) & 0xff0000) >> 8) | \ 218 (((x) & 0xff000000) >> 24)) 219 # define le64toh(x) \ 220 ((((x) & 0x00000000000000ffL) << 56) | \ 221 (((x) & 0x000000000000ff00L) << 40) | \ 222 (((x) & 0x0000000000ff0000L) << 24) | \ 223 (((x) & 0x00000000ff000000L) << 8) | \ 224 (((x) & 0x000000ff00000000L) >> 8) | \ 225 (((x) & 0x0000ff0000000000L) >> 24) | \ 226 (((x) & 0x00ff000000000000L) >> 40) | \ 227 (((x) & 0xff00000000000000L) >> 56)) 228 # ifndef htobe64 229 # define htobe64(x) be64toh(x) 230 # endif 231 # ifndef htobe32 232 # define htobe32(x) be32toh(x) 233 # endif 234 # ifndef htobe16 235 # define htobe16(x) be16toh(x) 236 # endif 237 238 239 #else 240 241 # error platform not supported 242 243 #endif 244 245 #endif