mirror of
https://github.com/ntop/n2n.git
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246 lines
8.4 KiB
C
246 lines
8.4 KiB
C
/**
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* (C) 2007-22 - ntop.org and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not see see <http://www.gnu.org/licenses/>
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*
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*/
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// taken from
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// https://raw.githubusercontent.com/pyca/bcrypt/master/src/_csrc/portable_endian.h
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// as of June 11, 2020
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// "License": Public Domain
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// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like.
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// In case there are jurisdictions that don't support putting things in the public domain you can also consider it to
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// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it
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// an example on how to get the endian conversion functions on different platforms.
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#ifndef PORTABLE_ENDIAN_H__
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#define PORTABLE_ENDIAN_H__
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#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
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# define __WINDOWS__
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#endif
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#if defined(__linux__) || defined(__CYGWIN__)
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/* Define necessary macros for the header to expose all fields. */
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# if !defined(_BSD_SOURCE)
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# define _BSD_SOURCE
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# endif
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# if !defined(__USE_BSD)
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# define __USE_BSD
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# endif
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# if !defined(_DEFAULT_SOURCE)
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# define _DEFAULT_SOURCE
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# endif
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# include <endian.h>
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# include <features.h>
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/* See http://linux.die.net/man/3/endian */
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# 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)
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/* Do nothing. The macros we need already exist. */
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# elif !defined(__GLIBC__) || !defined(__GLIBC_MINOR__) || ((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 9)))
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# include <arpa/inet.h>
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# if defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN)
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# define htobe16(x) htons(x)
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# define htole16(x) (x)
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# define be16toh(x) ntohs(x)
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# define le16toh(x) (x)
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# define htobe32(x) htonl(x)
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# define htole32(x) (x)
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# define be32toh(x) ntohl(x)
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# define le32toh(x) (x)
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# define htobe64(x) (((uint64_t)htonl(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)htonl(((uint32_t)(x)))) << 32))
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# define htole64(x) (x)
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# define be64toh(x) (((uint64_t)ntohl(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)ntohl(((uint32_t)(x)))) << 32))
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# define le64toh(x) (x)
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# elif defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN)
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# define htobe16(x) (x)
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# define htole16(x) (((((uint16_t)(x)) >> 8))|((((uint16_t)(x)) << 8)))
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# define be16toh(x) (x)
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# define le16toh(x) (((((uint16_t)(x)) >> 8))|((((uint16_t)(x)) << 8)))
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# define htobe32(x) (x)
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# define htole32(x) (((uint32_t)htole16(((uint16_t)(((uint32_t)(x)) >> 16)))) | (((uint32_t)htole16(((uint16_t)(x)))) << 16))
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# define be32toh(x) (x)
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# define le32toh(x) (((uint32_t)le16toh(((uint16_t)(((uint32_t)(x)) >> 16)))) | (((uint32_t)le16toh(((uint16_t)(x)))) << 16))
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# define htobe64(x) (x)
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# define htole64(x) (((uint64_t)htole32(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)htole32(((uint32_t)(x)))) << 32))
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# define be64toh(x) (x)
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# define le64toh(x) (((uint64_t)le32toh(((uint32_t)(((uint64_t)(x)) >> 32)))) | (((uint64_t)le32toh(((uint32_t)(x)))) << 32))
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# else
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# error Byte Order not supported or not defined.
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# endif
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# endif
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#elif defined(__APPLE__)
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# include <libkern/OSByteOrder.h>
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# define htobe16(x) OSSwapHostToBigInt16(x)
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# define htole16(x) OSSwapHostToLittleInt16(x)
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# define be16toh(x) OSSwapBigToHostInt16(x)
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# define le16toh(x) OSSwapLittleToHostInt16(x)
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# define htobe32(x) OSSwapHostToBigInt32(x)
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# define htole32(x) OSSwapHostToLittleInt32(x)
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# define be32toh(x) OSSwapBigToHostInt32(x)
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# define le32toh(x) OSSwapLittleToHostInt32(x)
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# define htobe64(x) OSSwapHostToBigInt64(x)
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# define htole64(x) OSSwapHostToLittleInt64(x)
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# define be64toh(x) OSSwapBigToHostInt64(x)
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# define le64toh(x) OSSwapLittleToHostInt64(x)
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# define __BYTE_ORDER BYTE_ORDER
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# define __BIG_ENDIAN BIG_ENDIAN
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# define __LITTLE_ENDIAN LITTLE_ENDIAN
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# define __PDP_ENDIAN PDP_ENDIAN
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#elif defined(__OpenBSD__)
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# include <sys/endian.h>
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#elif defined(__HAIKU__)
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# include <endian.h>
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#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
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# include <sys/endian.h>
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# if !defined(be16toh)
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# define be16toh(x) betoh16(x)
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# define le16toh(x) letoh16(x)
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# endif
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# if !defined(be32toh)
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# define be32toh(x) betoh32(x)
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# define le32toh(x) letoh32(x)
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# endif
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# if !defined(be64toh)
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# define be64toh(x) betoh64(x)
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# define le64toh(x) letoh64(x)
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# endif
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#elif defined(__WINDOWS__)
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# if BYTE_ORDER == LITTLE_ENDIAN
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# define htobe16(x) _byteswap_ushort(x)
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# define htole16(x) (x)
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# define be16toh(x) _byteswap_ushort(x)
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# define le16toh(x) (x)
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# define htobe32(x) _byteswap_ulong(x)
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# define htole32(x) (x)
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# define be32toh(x) _byteswap_ulong(x)
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# define le32toh(x) (x)
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# define htobe64(x) (((uint64_t)htobe32(((uint32_t)(((uint64_t)(x)) >> 32))) & 0x00000000FFFFFFFFULL) | (((uint64_t)htobe32(((uint32_t)(x)))) << 32))
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# define be64toh(x) (((uint64_t)be32toh(((uint32_t)(((uint64_t)(x)) >> 32))) & 0x00000000FFFFFFFFULL) | (((uint64_t)be32toh(((uint32_t)(x)))) << 32))
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# define htole64(x) (x)
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# define le64toh(x) (x)
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# elif BYTE_ORDER == BIG_ENDIAN
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/* that would be xbox 360 */
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# define htobe16(x) (x)
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# define htole16(x) __builtin_bswap16(x)
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# define be16toh(x) (x)
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# define le16toh(x) __builtin_bswap16(x)
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# define htobe32(x) (x)
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# define htole32(x) __builtin_bswap32(x)
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# define be32toh(x) (x)
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# define le32toh(x) __builtin_bswap32(x)
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# define htobe64(x) (x)
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# define htole64(x) __builtin_bswap64(x)
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# define be64toh(x) (x)
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# define le64toh(x) __builtin_bswap64(x)
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# else
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# error byte order not supported
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# endif
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# define __BYTE_ORDER BYTE_ORDER
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# define __BIG_ENDIAN BIG_ENDIAN
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# define __LITTLE_ENDIAN LITTLE_ENDIAN
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# define __PDP_ENDIAN PDP_ENDIAN
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#elif defined(__sun)
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# include <sys/byteorder.h>
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# define htobe16(x) BE_16(x)
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# define htole16(x) LE_16(x)
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# define be16toh(x) BE_16(x)
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# define le16toh(x) LE_16(x)
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# define htobe32(x) BE_32(x)
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# define htole32(x) LE_32(x)
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# define be32toh(x) BE_32(x)
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# define le32toh(x) LE_32(x)
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# define htobe64(x) BE_64(x)
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# define htole64(x) LE_64(x)
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# define be64toh(x) BE_64(x)
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# define le64toh(x) LE_64(x)
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#elif defined _AIX /* AIX is always big endian */
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# define be64toh(x) (x)
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# define be32toh(x) (x)
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# define be16toh(x) (x)
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# define le32toh(x) \
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((((x) & 0xff) << 24) | \
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(((x) & 0xff00) << 8) | \
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(((x) & 0xff0000) >> 8) | \
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(((x) & 0xff000000) >> 24))
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# define le64toh(x) \
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((((x) & 0x00000000000000ffL) << 56) | \
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(((x) & 0x000000000000ff00L) << 40) | \
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(((x) & 0x0000000000ff0000L) << 24) | \
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(((x) & 0x00000000ff000000L) << 8) | \
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(((x) & 0x000000ff00000000L) >> 8) | \
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(((x) & 0x0000ff0000000000L) >> 24) | \
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(((x) & 0x00ff000000000000L) >> 40) | \
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(((x) & 0xff00000000000000L) >> 56))
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# ifndef htobe64
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# define htobe64(x) be64toh(x)
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# endif
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# ifndef htobe32
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# define htobe32(x) be32toh(x)
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# endif
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# ifndef htobe16
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# define htobe16(x) be16toh(x)
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# endif
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#else
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# error platform not supported
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#endif
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#endif
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