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LibCore+Everywhere: Make Core::Stream::read() return Bytes

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A mistake I've repeatedly made is along these lines:
```c++
auto nread = TRY(source_file->read(buffer));
TRY(destination_file->write(buffer));
```

It's a little clunky to have to create a Bytes or StringView from the
buffer's data pointer and the nread, and easy to forget and just use
the buffer. So, this patch changes the read() function to return a
Bytes of the data that were just read.

The other read_foo() methods will be modified in the same way in
subsequent commits.

Fixes #13687
This commit is contained in:
Sam Atkins 2022-04-15 13:33:02 +01:00 • committed by Tim Flynn
parent 6654efcd82
commit 3b1e063d30
22 changed files with 103 additions and 103 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Userland/Libraries/LibTLS/Socket.cpp
View file

@ -18,18 +18,18 @@ constexpr static size_t MaximumApplicationDataChunkSize = 16 * KiB;
namespace TLS {
ErrorOr<size_t> TLSv12::read(Bytes bytes)
ErrorOr<Bytes> TLSv12::read(Bytes bytes)
{
m_eof = false;
auto size_to_read = min(bytes.size(), m_context.application_buffer.size());
if (size_to_read == 0) {
m_eof = true;
return 0;
return Bytes {};
}
m_context.application_buffer.span().slice(0, size_to_read).copy_to(bytes);
m_context.application_buffer = m_context.application_buffer.slice(size_to_read, m_context.application_buffer.size() - size_to_read);
return size_to_read;
return Bytes { bytes.data(), size_to_read };
}
String TLSv12::read_line(size_t max_size)
@ -186,7 +186,7 @@ ErrorOr<void> TLSv12::read_from_socket()
u8 buffer[16 * KiB];
Bytes bytes { buffer, array_size(buffer) };
size_t nread = 0;
Bytes read_bytes {};
auto& stream = underlying_stream();
do {
auto result = stream.read(bytes);
@ -198,9 +198,9 @@ ErrorOr<void> TLSv12::read_from_socket()
}
continue;
}
nread = result.release_value();
consume(bytes.slice(0, nread));
} while (nread > 0 && !m_context.critical_error);
read_bytes = result.release_value();
consume(read_bytes);
} while (!read_bytes.is_empty() && !m_context.critical_error);
return {};
}