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3be7eb789b
It seems `__BYTE_ORDER`/`__LITTLE_ENDIAN`/`__BIG_ENDIAN` aren't defined on macOS, so `if __BYTE_ORDER == __BIG_ENDIAN` was true which made macOS take the big endian path *twice* (which cancelled out the big endian conversion). This makes util/endian.hpp define __LITTLE_ENDIAN__ or __BIG_ENDIAN__ everywhere, and errors if it can't be set.
216 lines
4.6 KiB
C++
216 lines
4.6 KiB
C++
#ifndef LLARP_ENDIAN_HPP
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#define LLARP_ENDIAN_HPP
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// adapted from libi2pd
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#include <cinttypes>
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#include <cstring>
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#include <absl/numeric/int128.h>
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
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#include <sys/endian.h>
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#elif defined(__sun)
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#include <sys/byteorder.h>
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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) \
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(((uint64_t)htonl(((uint32_t)(((uint64_t)(x)) >> 32)))) \
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| (((uint64_t)htonl(((uint32_t)(x)))) << 32))
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#define htole64(x) (x)
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#define be64toh(x) \
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(((uint64_t)ntohl(((uint32_t)(((uint64_t)(x)) >> 32)))) \
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| (((uint64_t)ntohl(((uint32_t)(x)))) << 32))
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#define le64toh(x) (x)
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#elif defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__GLIBC__)
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#include <endian.h>
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#elif defined(__APPLE__) && defined(__MACH__)
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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(_WIN32)
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#include <winsock2.h>
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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) \
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(((uint64_t)htonl(((uint32_t)(((uint64_t)(x)) >> 32)))) \
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| (((uint64_t)htonl(((uint32_t)(x)))) << 32))
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#define htole64(x) (x)
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#define be64toh(x) \
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(((uint64_t)ntohl(((uint32_t)(((uint64_t)(x)) >> 32)))) \
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| (((uint64_t)ntohl(((uint32_t)(x)))) << 32))
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#define le64toh(x) (x)
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#else
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#define NEEDS_LOCAL_ENDIAN
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#include <cstdint>
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uint16_t
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htobe16(uint16_t int16);
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uint32_t
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htobe32(uint32_t int32);
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uint64_t
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htobe64(uint64_t int64);
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uint16_t
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be16toh(uint16_t big16);
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uint32_t
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be32toh(uint32_t big32);
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uint64_t
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be64toh(uint64_t big64);
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// assume LittleEndine
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#define htole16
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#define htole32
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#define htole64
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#define le16toh
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#define le32toh
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#define le64toh
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#endif
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#if !defined(__LITTLE_ENDIAN__) && defined(__BYTE_ORDER) \
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&& defined(__LITTLE_ENDIAN) && __BYTE_ORDER == __LITTLE_ENDIAN
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#define __LITTLE_ENDIAN__
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#elif !defined(__BIG_ENDIAN__) && defined(__BYTE_ORDER) \
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&& defined(__BIG_ENDIAN) && __BYTE_ORDER == __BIG_ENDIAN
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#define __BIG_ENDIAN__
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#elif !defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)
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#error "Error: don't know which endian this is"
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#endif
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inline uint16_t
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buf16toh(const void *buf)
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{
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uint16_t b16;
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memcpy(&b16, buf, sizeof(uint16_t));
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return b16;
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}
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inline uint32_t
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buf32toh(const void *buf)
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{
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uint32_t b32;
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memcpy(&b32, buf, sizeof(uint32_t));
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return b32;
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}
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inline uint64_t
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buf64toh(const void *buf)
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{
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uint64_t b64;
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memcpy(&b64, buf, sizeof(uint64_t));
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return b64;
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}
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inline uint16_t
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bufbe16toh(const void *buf)
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{
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return be16toh(buf16toh(buf));
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}
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inline uint32_t
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bufbe32toh(const void *buf)
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{
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return be32toh(buf32toh(buf));
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}
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inline uint64_t
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bufbe64toh(const void *buf)
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{
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return be64toh(buf64toh(buf));
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}
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inline void
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htobuf16(void *buf, uint16_t b16)
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{
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memcpy(buf, &b16, sizeof(uint16_t));
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}
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inline void
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htobuf32(void *buf, uint32_t b32)
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{
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memcpy(buf, &b32, sizeof(uint32_t));
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}
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inline void
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htobuf64(void *buf, uint64_t b64)
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{
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memcpy(buf, &b64, sizeof(uint64_t));
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}
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inline void
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htobe16buf(void *buf, uint16_t big16)
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{
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htobuf16(buf, htobe16(big16));
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}
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inline void
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htobe32buf(void *buf, uint32_t big32)
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{
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htobuf32(buf, htobe32(big32));
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}
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inline void
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htobe64buf(void *buf, uint64_t big64)
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{
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htobuf64(buf, htobe64(big64));
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}
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inline void
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htole16buf(void *buf, uint16_t big16)
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{
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htobuf16(buf, htole16(big16));
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}
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inline void
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htole32buf(void *buf, uint32_t big32)
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{
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htobuf32(buf, htole32(big32));
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}
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inline void
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htole64buf(void *buf, uint64_t big64)
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{
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htobuf64(buf, htole64(big64));
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}
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inline absl::uint128
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ntoh128(absl::uint128 i)
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{
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#ifdef __BIG_ENDIAN__
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return i;
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#else
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const auto loSwapped = htobe64(absl::Uint128Low64(i));
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const auto hiSwapped = htobe64(absl::Uint128High64(i));
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return absl::MakeUint128(loSwapped, hiSwapped);
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#endif
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}
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#endif
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