mirror of
https://github.com/matrix-construct/construct
synced 2024-11-10 12:01:15 +01:00
155 lines
2.7 KiB
C++
155 lines
2.7 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_UTIL_BSWAP_H
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namespace ircd {
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inline namespace util
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{
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template<class T> T &bswap(T *) noexcept;
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template<class T> T bswap(T) noexcept;
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// Host <-> network endian
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template<class T> T &hton(T *const &);
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template<class T> T &ntoh(T *const &);
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template<class T> T hton(T);
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template<class T> T ntoh(T);
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// Convenience host to network interface for arpa/inet.h compat
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uint32_t htonl(const uint32_t &);
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uint16_t htons(const uint16_t &);
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double htond(const double &);
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float htonf(const float &);
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// Convenience network to host interface for arpa/inet.h compat
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uint32_t ntohl(const uint32_t &);
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uint16_t ntohs(const uint16_t &);
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double ntohd(const double &);
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float ntohf(const float &);
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}}
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inline float
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ircd::util::ntohf(const float &a)
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{
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return ntoh(a);
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}
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inline double
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ircd::util::ntohd(const double &a)
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{
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return ntoh(a);
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}
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inline uint32_t
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ircd::util::ntohl(const uint32_t &a)
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{
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return ntoh(a);
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}
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inline uint16_t
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ircd::util::ntohs(const uint16_t &a)
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{
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return ntoh(a);
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}
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inline float
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ircd::util::htonf(const float &a)
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{
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return hton(a);
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}
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inline double
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ircd::util::htond(const double &a)
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{
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return hton(a);
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}
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inline uint32_t
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ircd::util::htonl(const uint32_t &a)
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{
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return hton(a);
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}
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inline uint16_t
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ircd::util::htons(const uint16_t &a)
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{
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return hton(a);
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}
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template<class T>
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inline T
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ircd::util::hton(T a)
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{
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return hton<T>(&a);
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}
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template<class T>
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inline T
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ircd::util::ntoh(T a)
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{
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return ntoh<T>(&a);
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}
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template<class T>
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inline T &
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ircd::util::hton(T *const &a)
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{
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return bswap(a);
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#else
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assert(a);
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return *a;
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#endif
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}
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template<class T>
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inline T &
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ircd::util::ntoh(T *const &a)
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{
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return bswap(a);
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#else
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assert(a);
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return *a;
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#endif
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}
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/// Reverse endian of T returning value copy
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template<class T>
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inline T
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ircd::util::bswap(T ret)
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noexcept
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{
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return bswap(&ret);
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}
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/// Reverse endian of data pointed to; return reference
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template<class T>
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inline T &
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ircd::util::bswap(T *const val)
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noexcept
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{
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assert(val != nullptr);
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const auto &src
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{
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reinterpret_cast<const uint8_t *>(val)
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};
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T tmp;
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const auto &dst
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{
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reinterpret_cast<uint8_t *>(&tmp)
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};
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std::reverse_copy(src, src + sizeof(T), dst);
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*val = tmp;
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return *val;
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}
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