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834fb0be36
These are quite bottlenecky in wasm, the next commit will try to make use of this by calling them directly instead of doing a vcall, and having them inlineable helps the compiler a bit.
37 lines
920 B
C++
37 lines
920 B
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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* Copyright (c) 2023, Tim Schumacher <timschumi@gmx.de>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/MaybeOwned.h>
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#include <AK/Stream.h>
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namespace AK {
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class ConstrainedStream : public Stream {
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public:
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ConstrainedStream(MaybeOwned<Stream>, u64 limit);
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virtual ErrorOr<Bytes> read_some(Bytes bytes) override
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{
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auto result = TRY(m_stream->read_some(bytes.trim(m_limit)));
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m_limit -= result.size();
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return result;
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}
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virtual ErrorOr<void> discard(size_t discarded_bytes) override;
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virtual ErrorOr<size_t> write_some(ReadonlyBytes) override;
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virtual bool is_eof() const override;
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virtual bool is_open() const override;
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virtual void close() override;
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u64 remaining() const { return m_limit; }
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private:
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MaybeOwned<Stream> m_stream;
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u64 m_limit;
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};
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}
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