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refactor: move Buffer::add_socket() to BufferWriter::add_socket() (#5543)

This commit is contained in:
Charles Kerr 2023-05-19 23:06:26 -05:00 committed by GitHub
parent ae888ef08e
commit e171cbae9c
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 28 additions and 31 deletions
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59
libtransmission/tr-buffer.h
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@ -53,7 +53,7 @@ public:
[[nodiscard]] TR_CONSTEXPR20 bool starts_with(T const& needle) const
{
auto const n_bytes = std::size(needle);
auto const needle_begin = reinterpret_cast<std::byte const*>(std::data(needle));
auto const needle_begin = reinterpret_cast<value_type const*>(std::data(needle));
auto const needle_end = needle_begin + n_bytes;
return n_bytes <= size() && std::equal(needle_begin, needle_end, data());
}
@ -195,6 +195,32 @@ public:
auto nport = port.network();
add(&nport, sizeof(nport));
}
size_t add_socket(tr_socket_t sockfd, size_t n_bytes, tr_error** error = nullptr)
{
auto const [buf, buflen] = reserve_space(n_bytes);
auto const n_read = recv(sockfd, reinterpret_cast<char*>(buf), std::min(n_bytes, buflen), 0);
auto const err = sockerrno;
if (n_read > 0)
{
commit_space(n_read);
return static_cast<size_t>(n_read);
}
// When a stream socket peer has performed an orderly shutdown,
// the return value will be 0 (the traditional "end-of-file" return).
if (n_read == 0)
{
tr_error_set_from_errno(error, ENOTCONN);
}
else
{
tr_error_set(error, err, tr_net_strerror(err));
}
return {};
}
};
class Buffer final
@ -216,8 +242,6 @@ public:
add(data);
}
// -- BufferReader
[[nodiscard]] size_t size() const noexcept override
{
return evbuffer_get_length(buf_.get());
@ -225,7 +249,7 @@ public:
[[nodiscard]] value_type const* data() const override
{
return reinterpret_cast<std::byte*>(evbuffer_pullup(buf_.get(), -1));
return reinterpret_cast<value_type const*>(evbuffer_pullup(buf_.get(), -1));
}
void drain(size_t n_bytes) override
@ -233,8 +257,6 @@ public:
evbuffer_drain(buf_.get(), n_bytes);
}
// -- BufferWriter
[[nodiscard]] std::pair<value_type*, size_t> reserve_space(size_t n_bytes) override
{
auto iov = evbuffer_iovec{};
@ -253,31 +275,6 @@ public:
reserved_space_.reset();
}
//
size_t add_socket(tr_socket_t sockfd, size_t n_bytes, tr_error** error = nullptr)
{
EVUTIL_SET_SOCKET_ERROR(0);
auto const res = evbuffer_read(buf_.get(), sockfd, static_cast<int>(n_bytes));
auto const err = EVUTIL_SOCKET_ERROR();
if (res > 0)
{
return static_cast<size_t>(res);
}
if (res == 0)
{
tr_error_set_from_errno(error, ENOTCONN);
}
else
{
tr_error_set(error, err, tr_net_strerror(err));
}
return {};
}
private:
evhelpers::evbuffer_unique_ptr buf_{ evbuffer_new() };
std::optional<evbuffer_iovec> reserved_space_;