76 lines
1.7 KiB
C++
76 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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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/EnumBits.h>
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#include <AK/Forward.h>
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#include <AK/Stream.h>
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#include <LibCore/Object.h>
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namespace Core {
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enum class OpenMode : unsigned {
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NotOpen = 0,
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ReadOnly = 1,
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WriteOnly = 2,
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ReadWrite = 3,
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Append = 4,
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Truncate = 8,
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MustBeNew = 16,
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KeepOnExec = 32,
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};
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AK_ENUM_BITWISE_OPERATORS(OpenMode)
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class IODevice : public Object {
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C_OBJECT_ABSTRACT(IODevice)
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public:
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virtual ~IODevice() override = default;
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int fd() const { return m_fd; }
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OpenMode mode() const { return m_mode; }
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bool eof() const { return m_eof; }
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int error() const { return m_error; }
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char const* error_string() const;
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int read(u8* buffer, int length);
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ByteBuffer read(size_t max_size);
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ByteBuffer read_all();
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DeprecatedString read_line(size_t max_size = 16384);
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bool write(u8 const*, int size);
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bool can_read_line() const;
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bool seek(i64, SeekMode = SeekMode::SetPosition, off_t* = nullptr);
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virtual bool open(OpenMode) = 0;
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virtual bool close();
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protected:
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explicit IODevice(Object* parent = nullptr);
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void set_fd(int);
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void set_mode(OpenMode mode) { m_mode = mode; }
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void set_error(int error) const { m_error = error; }
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void set_eof(bool eof) const { m_eof = eof; }
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private:
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bool populate_read_buffer(size_t size = 1024) const;
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bool can_read_from_fd() const;
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int m_fd { -1 };
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OpenMode m_mode { OpenMode::NotOpen };
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mutable int m_error { 0 };
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mutable bool m_eof { false };
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mutable Vector<u8> m_buffered_data;
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};
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}
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