146 lines
3.7 KiB
C++
146 lines
3.7 KiB
C++
/*
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* This file Copyright (C) 2017 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#pragma once
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#include <array>
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#include <cstddef>
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#include <cstdint>
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/***
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****
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***/
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#ifndef __has_feature
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#define __has_feature(x) 0
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#endif
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#ifndef __has_extension
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#define __has_extension __has_feature
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#endif
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#ifndef __has_attribute
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#define __has_attribute(x) 0
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#endif
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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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 __GNUC__
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#define TR_GNUC_CHECK_VERSION(major, minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
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#else
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#define TR_GNUC_CHECK_VERSION(major, minor) 0
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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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****
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***/
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#if __has_builtin(__builtin_expect) || TR_GNUC_CHECK_VERSION(3, 0)
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#define TR_LIKELY(x) __builtin_expect(!!(x), 1)
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#define TR_UNLIKELY(x) __builtin_expect(!!(x), 0)
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#else
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#define TR_LIKELY(x) (x)
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#define TR_UNLIKELY(x) (x)
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#endif
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/***
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****
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***/
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#if __has_attribute(__deprecated__) || TR_GNUC_CHECK_VERSION(3, 1)
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#define TR_DEPRECATED __attribute__((__deprecated__))
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#elif defined(_MSC_VER)
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#define TR_DEPRECATED __declspec(deprecated)
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#else
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#define TR_DEPRECATED
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#endif
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#if __has_attribute(__format__) || TR_GNUC_CHECK_VERSION(2, 3)
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#define TR_GNUC_PRINTF(fmt, args) __attribute__((__format__(printf, fmt, args)))
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#else
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#define TR_GNUC_PRINTF(fmt, args)
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#endif
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#if __has_attribute(__nonnull__) || TR_GNUC_CHECK_VERSION(3, 3)
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#define TR_GNUC_NONNULL(...) __attribute__((__nonnull__(__VA_ARGS__)))
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#else
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#define TR_GNUC_NONNULL(...)
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#endif
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#if __has_attribute(__sentinel__) || TR_GNUC_CHECK_VERSION(4, 3)
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#define TR_GNUC_NULL_TERMINATED __attribute__((__sentinel__))
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#else
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#define TR_GNUC_NULL_TERMINATED
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#endif
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#if __has_attribute(__hot__) || TR_GNUC_CHECK_VERSION(4, 3)
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#define TR_GNUC_HOT __attribute__((__hot__))
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#else
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#define TR_GNUC_HOT
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#endif
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#if __has_attribute(__malloc__) || TR_GNUC_CHECK_VERSION(2, 96)
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#define TR_GNUC_MALLOC __attribute__((__malloc__))
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#else
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#define TR_GNUC_MALLOC
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#endif
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/***
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****
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***/
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#define TR_PATH_DELIMITER '/'
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#define TR_PATH_DELIMITER_STR "/"
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/* Only use this macro to suppress false-positive alignment warnings */
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#define TR_DISCARD_ALIGN(ptr, type) ((type)(void*)(ptr))
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#define TR_INET6_ADDRSTRLEN 46
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#define TR_ADDRSTRLEN 64
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#define TR_BAD_SIZE ((size_t)-1)
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// Mostly to enforce better formatting
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#define TR_ARG_TUPLE(...) __VA_ARGS__
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#define TR_PRIsv "*.*s"
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#define TR_PRIsv_ARG(sv) TR_ARG_TUPLE(int(std::size(sv)), int(std::size(sv)), std::data(sv))
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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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auto inline constexpr PEER_ID_LEN = size_t{ 20 };
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using tr_peer_id_t = std::array<char, PEER_ID_LEN>;
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#define SHA_DIGEST_LENGTH 20
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// TODO #1: all arrays of SHA_DIGEST_LENGTH should be replaced with tr_sha1_digest_t
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// TODO #2: tr_peer_id_t, tr_sha1_digest_t should be moved into a new 'types.h' header
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auto inline constexpr TR_SHA1_DIGEST_LEN = size_t{ 20 };
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using tr_sha1_digest_t = std::array<std::byte, TR_SHA1_DIGEST_LEN>;
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using tr_sha1_digest_string_t = std::array<char, TR_SHA1_DIGEST_LEN * 2 + 1>;
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