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LibCore: Add Stream::discard()

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This commit is contained in:
Tim Schumacher 2022-11-28 18:54:14 +01:00 • committed by Andreas Kling
parent 7a065513cd
commit 6e29619dcb
2 changed files with 38 additions and 0 deletions
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8
Userland/Libraries/LibCore/Stream.h
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@ -41,6 +41,10 @@ public:
/// is returned once EOF is encountered. The block size determines the size
/// of newly allocated chunks while reading.
virtual ErrorOr<ByteBuffer> read_all(size_t block_size = 4096);
/// Discards the given number of bytes from the stream.
/// Unless specifically overwritten, this just uses read() to read into an
/// internal stack-based buffer.
virtual ErrorOr<void> discard(size_t discarded_bytes);
virtual bool is_writable() const { return false; }
/// Tries to write the entire contents of the buffer. It is possible for
@ -97,6 +101,9 @@ public:
/// Shrinks or extends the stream to the given size. Returns an errno in
/// the case of an error.
virtual ErrorOr<void> truncate(off_t length) = 0;
/// Seeks until after the given amount of bytes to be discarded instead of
/// reading and discarding everything manually;
virtual ErrorOr<void> discard(size_t discarded_bytes) override;
};
/// The Socket class is the base class for all concrete BSD-style socket
@ -973,6 +980,7 @@ class WrappedAKInputStream final : public Stream {
public:
WrappedAKInputStream(NonnullOwnPtr<InputStream> stream);
virtual ErrorOr<Bytes> read(Bytes) override;
virtual ErrorOr<void> discard(size_t discarded_bytes) override;
virtual ErrorOr<size_t> write(ReadonlyBytes) override;
virtual bool is_eof() const override;
virtual bool is_open() const override;