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AK: Add CircularBuffer::read_with_seekback

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Tim Schumacher 2022-12-31 23:35:45 +01:00 • committed by Andrew Kaster
parent afc0e461e1
commit d717a08003
2 changed files with 43 additions and 0 deletions
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6
AK/CircularBuffer.h
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@ -42,6 +42,10 @@ public:
Bytes read(Bytes bytes);
ErrorOr<void> discard(size_t discarded_bytes);
/// Compared to `read()`, this starts reading from an offset that is `distance` bytes
/// before the current write pointer and allows for reading already-read data.
ErrorOr<Bytes> read_with_seekback(Bytes bytes, size_t distance);
[[nodiscard]] size_t empty_space() const;
[[nodiscard]] size_t used_space() const;
[[nodiscard]] size_t capacity() const;
@ -57,11 +61,13 @@ private:
[[nodiscard]] Bytes next_write_span();
[[nodiscard]] ReadonlyBytes next_read_span() const;
[[nodiscard]] ReadonlyBytes next_read_span_with_seekback(size_t distance) const;
ByteBuffer m_buffer {};
size_t m_reading_head {};
size_t m_used_space {};
size_t m_seekback_limit {};
};
}