/*

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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")

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*

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* This Source Code Form is subject to the terms of the Mozilla Public

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* License, v. 2.0. If a copy of the MPL was not distributed with this

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* file, you can obtain one at https://mozilla.org/MPL/2.0/.

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*

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* See the COPYRIGHT file distributed with this work for additional

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* information regarding copyright ownership.

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*/

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#pragma once

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#if defined(__DragonFly__) || defined(__FreeBSD__) || \

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defined(__NetBSD__) || defined (__OpenBSD__) || defined(__bsdi__)

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# include <sys/endian.h>

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/*

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* Recent BSDs should have [bl]e{16,32,64}toh() defined in <sys/endian.h>.

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* Older ones might not, but these should have the alternatively named

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* [bl]etoh{16,32,64}() functions defined.

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*/

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# ifndef be16toh

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# define be16toh(x) betoh16(x)

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# define le16toh(x) letoh16(x)

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# define be32toh(x) betoh32(x)

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# define le32toh(x) letoh32(x)

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# define be64toh(x) betoh64(x)

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# define le64toh(x) letoh64(x)

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# endif /* !be16toh */

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#elif defined(_WIN32)

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/*

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* Windows is always little-endian and has its own byte-swapping routines, so

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* use these.

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*/

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# include <stdlib.h>

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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) _byteswap_uint64(x)

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# define htole64(x) (x)

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# define be64toh(x) _byteswap_uint64(x)

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# define le64toh(x) (x)

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#elif defined __APPLE__

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/*

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* macOS has its own byte-swapping routines, so use these.

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*/

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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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#elif defined(sun) || defined(__sun) || defined(__SVR4)

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/*

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* For Solaris, rely on the fallback definitions below, though use

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* Solaris-specific versions of bswap_{16,32,64}().

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*/

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# include <sys/byteorder.h>

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# define bswap_16(x) BSWAP_16(x)

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# define bswap_32(x) BSWAP_32(x)

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# define bswap_64(x) BSWAP_64(x)

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#elif defined(__ANDROID__) || defined(__CYGWIN__) || \

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defined(__GNUC__) || defined(__GNU__)

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# include <byteswap.h>

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# include <endian.h>

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#else

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#endif /* Specific platform support */

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/*

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* Fallback definitions.

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*/

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#include <inttypes.h>

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#ifndef bswap_16

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# define bswap_16(x) \

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((uint16_t)((((uint16_t) (x) & 0xff00) >> 8) | \

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(((uint16_t) (x) & 0x00ff) << 8)))

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#endif /* !bswap_16 */

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#ifndef bswap_32

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# define bswap_32(x) \

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((uint32_t)((((uint32_t) (x) & 0xff000000) >> 24) | \

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(((uint32_t) (x) & 0x00ff0000) >> 8) | \

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(((uint32_t) (x) & 0x0000ff00) << 8) | \

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(((uint32_t) (x) & 0x000000ff) << 24)))

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#endif /* !bswap_32 */

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#ifndef bswap_64

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# define bswap_64(x) \

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((uint64_t)((((uint64_t) (x) & 0xff00000000000000ULL) >> 56) | \

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(((uint64_t) (x) & 0x00ff000000000000ULL) >> 40) | \

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(((uint64_t) (x) & 0x0000ff0000000000ULL) >> 24) | \

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(((uint64_t) (x) & 0x000000ff00000000ULL) >> 8) | \

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(((uint64_t) (x) & 0x00000000ff000000ULL) << 8) | \

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(((uint64_t) (x) & 0x0000000000ff0000ULL) << 24) | \

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(((uint64_t) (x) & 0x000000000000ff00ULL) << 40) | \

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(((uint64_t) (x) & 0x00000000000000ffULL) << 56)))

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#endif /* !bswap_64 */

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#ifndef htobe16

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# if WORDS_BIGENDIAN

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# define htobe16(x) (x)

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# define htole16(x) bswap_16(x)

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# define be16toh(x) (x)

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# define le16toh(x) bswap_16(x)

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# else /* WORDS_BIGENDIAN */

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# define htobe16(x) bswap_16(x)

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# define htole16(x) (x)

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# define be16toh(x) bswap_16(x)

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# define le16toh(x) (x)

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# endif /* WORDS_BIGENDIAN */

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#endif /* !htobe16 */

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#ifndef htobe32

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# if WORDS_BIGENDIAN

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# define htobe32(x) (x)

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# define htole32(x) bswap_32(x)

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# define be32toh(x) (x)

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# define le32toh(x) bswap_32(x)

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# else /* WORDS_BIGENDIAN */

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# define htobe32(x) bswap_32(x)

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# define htole32(x) (x)

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# define be32toh(x) bswap_32(x)

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# define le32toh(x) (x)

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# endif /* WORDS_BIGENDIAN */

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#endif /* !htobe32 */

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#ifndef htobe64

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# if WORDS_BIGENDIAN

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# define htobe64(x) (x)

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# define htole64(x) bswap_64(x)

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# define be64toh(x) (x)

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# define le64toh(x) bswap_64(x)

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#else /* WORDS_BIGENDIAN */

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# define htobe64(x) bswap_64(x)

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# define htole64(x) (x)

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# define be64toh(x) bswap_64(x)

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# define le64toh(x) (x)

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# endif /* WORDS_BIGENDIAN */

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#endif /* !htobe64 */

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