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Diffstat (limited to '')
-rw-r--r-- | lib/isc/include/isc/endian.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/lib/isc/include/isc/endian.h b/lib/isc/include/isc/endian.h new file mode 100644 index 0000000..be91b1d --- /dev/null +++ b/lib/isc/include/isc/endian.h @@ -0,0 +1,166 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || \ + defined(__OpenBSD__) || defined(__bsdi__) + +#include <sys/endian.h> + +/* + * Recent BSDs should have [bl]e{16,32,64}toh() defined in <sys/endian.h>. + * Older ones might not, but these should have the alternatively named + * [bl]etoh{16,32,64}() functions defined. + */ +#ifndef be16toh +#define be16toh(x) betoh16(x) +#define le16toh(x) letoh16(x) +#define be32toh(x) betoh32(x) +#define le32toh(x) letoh32(x) +#define be64toh(x) betoh64(x) +#define le64toh(x) letoh64(x) +#endif /* !be16toh */ + +#elif defined __APPLE__ + +/* + * macOS has its own byte-swapping routines, so use these. + */ + +#include <libkern/OSByteOrder.h> + +#define htobe16(x) OSSwapHostToBigInt16(x) +#define htole16(x) OSSwapHostToLittleInt16(x) +#define be16toh(x) OSSwapBigToHostInt16(x) +#define le16toh(x) OSSwapLittleToHostInt16(x) + +#define htobe32(x) OSSwapHostToBigInt32(x) +#define htole32(x) OSSwapHostToLittleInt32(x) +#define be32toh(x) OSSwapBigToHostInt32(x) +#define le32toh(x) OSSwapLittleToHostInt32(x) + +#define htobe64(x) OSSwapHostToBigInt64(x) +#define htole64(x) OSSwapHostToLittleInt64(x) +#define be64toh(x) OSSwapBigToHostInt64(x) +#define le64toh(x) OSSwapLittleToHostInt64(x) + +#elif defined(sun) || defined(__sun) || defined(__SVR4) + +/* + * For Solaris, rely on the fallback definitions below, though use + * Solaris-specific versions of bswap_{16,32,64}(). + */ + +#include <sys/byteorder.h> + +#define bswap_16(x) BSWAP_16(x) +#define bswap_32(x) BSWAP_32(x) +#define bswap_64(x) BSWAP_64(x) + +#elif defined(__ANDROID__) || defined(__CYGWIN__) || defined(__GNUC__) || \ + defined(__GNU__) + +#include <byteswap.h> +#include <endian.h> + +#else /* if defined(__DragonFly__) || defined(__FreeBSD__) || \ + * defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__) */ + +#endif /* Specific platform support */ + +/* + * Fallback definitions. + */ + +#include <inttypes.h> + +#ifndef bswap_16 +#define bswap_16(x) \ + ((uint16_t)((((uint16_t)(x)&0xff00) >> 8) | \ + (((uint16_t)(x)&0x00ff) << 8))) +#endif /* !bswap_16 */ + +#ifndef bswap_32 +#define bswap_32(x) \ + ((uint32_t)((((uint32_t)(x)&0xff000000) >> 24) | \ + (((uint32_t)(x)&0x00ff0000) >> 8) | \ + (((uint32_t)(x)&0x0000ff00) << 8) | \ + (((uint32_t)(x)&0x000000ff) << 24))) +#endif /* !bswap_32 */ + +#ifndef bswap_64 +#define bswap_64(x) \ + ((uint64_t)((((uint64_t)(x)&0xff00000000000000ULL) >> 56) | \ + (((uint64_t)(x)&0x00ff000000000000ULL) >> 40) | \ + (((uint64_t)(x)&0x0000ff0000000000ULL) >> 24) | \ + (((uint64_t)(x)&0x000000ff00000000ULL) >> 8) | \ + (((uint64_t)(x)&0x00000000ff000000ULL) << 8) | \ + (((uint64_t)(x)&0x0000000000ff0000ULL) << 24) | \ + (((uint64_t)(x)&0x000000000000ff00ULL) << 40) | \ + (((uint64_t)(x)&0x00000000000000ffULL) << 56))) +#endif /* !bswap_64 */ + +#ifndef htobe16 +#if WORDS_BIGENDIAN + +#define htobe16(x) (x) +#define htole16(x) bswap_16(x) +#define be16toh(x) (x) +#define le16toh(x) bswap_16(x) + +#else /* WORDS_BIGENDIAN */ + +#define htobe16(x) bswap_16(x) +#define htole16(x) (x) +#define be16toh(x) bswap_16(x) +#define le16toh(x) (x) + +#endif /* WORDS_BIGENDIAN */ +#endif /* !htobe16 */ + +#ifndef htobe32 +#if WORDS_BIGENDIAN + +#define htobe32(x) (x) +#define htole32(x) bswap_32(x) +#define be32toh(x) (x) +#define le32toh(x) bswap_32(x) + +#else /* WORDS_BIGENDIAN */ + +#define htobe32(x) bswap_32(x) +#define htole32(x) (x) +#define be32toh(x) bswap_32(x) +#define le32toh(x) (x) + +#endif /* WORDS_BIGENDIAN */ +#endif /* !htobe32 */ + +#ifndef htobe64 +#if WORDS_BIGENDIAN + +#define htobe64(x) (x) +#define htole64(x) bswap_64(x) +#define be64toh(x) (x) +#define le64toh(x) bswap_64(x) + +#else /* WORDS_BIGENDIAN */ + +#define htobe64(x) bswap_64(x) +#define htole64(x) (x) +#define be64toh(x) bswap_64(x) +#define le64toh(x) (x) + +#endif /* WORDS_BIGENDIAN */ +#endif /* !htobe64 */ |