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70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
/******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along
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with Sortix. If not, see <http://www.gnu.org/licenses/>.
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stream.h
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Various device types that provides a sequence of bytes.
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******************************************************************************/
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#ifndef SORTIX_STREAM_H
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#define SORTIX_STREAM_H
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#include "device.h"
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namespace Sortix
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{
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class DevStream : public Device
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{
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public:
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typedef Device BaseClass;
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public:
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virtual bool IsType(unsigned type) { return type == Device::STREAM; }
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public:
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virtual ssize_t Read(byte* dest, size_t count) = 0;
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virtual ssize_t Write(const byte* src, size_t count) = 0;
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virtual bool IsReadable() = 0;
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virtual bool IsWritable() = 0;
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};
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class DevBuffer : public DevStream
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{
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public:
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typedef DevStream BaseClass;
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public:
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virtual bool IsType(unsigned type)
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{
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return type == Device::BUFFER || BaseClass::IsType(type);
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}
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public:
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virtual size_t BlockSize() = 0;
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virtual uintmax_t Size() = 0;
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virtual uintmax_t Position() = 0;
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virtual bool Seek(uintmax_t position) = 0;
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virtual bool Resize(uintmax_t size) = 0;
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};
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}
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#endif
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