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cbc5388440
* build: bump to C++20 Co-authored-by: Cœur <coeur@gmx.fr> * refactor: use designated initializers * refactor: remove redundant SFINAE * fix: clang-tidy warnings * chore: comments about min compiler versions for C++20 features * build: clang objc++ modules build errors Co-authored-by: Dzmitry Neviadomski <nevack.d@gmail.com> * refactor: add `TR_CONSTEXPR_VEC` and `TR_CONSTEXPR_STR` * fix: don't use `std::rel_ops` * chore: housekeeping * fix: possible fix for macOS linker error --------- Co-authored-by: Cœur <coeur@gmx.fr> Co-authored-by: Dzmitry Neviadomski <nevack.d@gmail.com> Co-authored-by: Charles Kerr <charles@charleskerr.com>
83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
// This file Copyright © Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
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// or any future license endorsed by Mnemosyne LLC.
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// License text can be found in the licenses/ folder.
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#pragma once
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#include <array>
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#include <cstddef> // for std::byte
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#include <cstdint> // for uint32_t
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// ---
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#if __cplusplus >= 202002L || _MSVC_LANG >= 202002L
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#define TR_CONSTEXPR20 constexpr
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#else
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#define TR_CONSTEXPR20
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#endif
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#if __cpp_lib_constexpr_vector >= 201907L
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#define TR_CONSTEXPR_VEC constexpr
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#else
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#define TR_CONSTEXPR_VEC
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#endif
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#if __cpp_lib_constexpr_string >= 201907L
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#define TR_CONSTEXPR_STR constexpr
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#else
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#define TR_CONSTEXPR_STR
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#endif
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#if __cplusplus >= 202302L // _MSVC_LANG value for C++23 not available yet
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#define TR_CONSTEXPR23 constexpr
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#else
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#define TR_CONSTEXPR23
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#endif
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// ---
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#ifdef _WIN32
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#define TR_IF_WIN32(ThenValue, ElseValue) ThenValue
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#else
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#define TR_IF_WIN32(ThenValue, ElseValue) ElseValue
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#endif
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#ifdef __UCLIBC__
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#define TR_UCLIBC_CHECK_VERSION(major, minor, micro) \
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(__UCLIBC_MAJOR__ > (major) || (__UCLIBC_MAJOR__ == (major) && __UCLIBC_MINOR__ > (minor)) || \
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(__UCLIBC_MAJOR__ == (major) && __UCLIBC_MINOR__ == (minor) && __UCLIBC_SUBLEVEL__ >= (micro)))
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#else
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#define TR_UCLIBC_CHECK_VERSION(major, minor, micro) 0
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#endif
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// ---
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inline auto constexpr TrInet6AddrStrlen = 46U;
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inline auto constexpr TrAddrStrlen = 64U;
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// https://www.bittorrent.org/beps/bep_0007.html
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// "The client SHOULD include a key parameter in its announces. The key
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// should remain the same for a particular infohash during a torrent
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// session. Together with the peer_id this allows trackers to uniquely
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// identify clients for the purpose of statistics-keeping when they
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// announce from multiple IP.
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// The key should be generated so it has at least 32bits worth of entropy."
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//
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// https://www.bittorrent.org/beps/bep_0015.html
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// "Clients that resolve hostnames to v4 and v6 and then announce to both
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// should use the same [32-bit integer] key for both so that trackers that
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// care about accurate statistics-keeping can match the two announces."
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using tr_announce_key_t = uint32_t;
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// https://www.bittorrent.org/beps/bep_0003.html
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// A string of length 20 which this downloader uses as its id. Each
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// downloader generates its own id at random at the start of a new
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// download. This value will also almost certainly have to be escaped.
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using tr_peer_id_t = std::array<char, 20>;
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using tr_sha1_digest_t = std::array<std::byte, 20>;
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using tr_sha256_digest_t = std::array<std::byte, 32>;
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