89 lines
2.1 KiB
C++
89 lines
2.1 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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namespace Sortix
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{
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class Device
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{
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public:
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Device() { };
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virtual ~Device() { }
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public:
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virtual void close() = 0;
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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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DevStream() { };
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virtual ~DevStream() { }
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public:
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virtual size_t write(const void* buffer, size_t bufferSize) = 0;
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virtual size_t readSome(const void* buffer, size_t bufferSize) = 0;
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public:
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inline size_t read(const void* buffer, size_t bufferSize)
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{
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const uint8_t* bytes = (uint8_t*) buffer;
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size_t total = bufferSize;
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while ( BufferSize > 0 )
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{
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size_t got = readSome(bytes, bufferSize);
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if ( got == SIZE_MAX ) { return SIZE_MAX; }
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bytes += got;
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bufferSize -= got;
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}
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return total;
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}
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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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DevBuffer() { };
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virtual ~DevBuffer() { }
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public:
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virtual size_t write(const void* buffer, size_t bufferSize) = 0;
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virtual size_t readSome(const void* buffer, size_t bufferSize) = 0;
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public:
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virtual size_t blockSize() = 0;
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virtual intmax_t size() = 0;
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virtual intmax_t position() = 0;
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virtual bool seek(intmax_t position) = 0;
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virtual bool resize(intmax_t size) = 0;
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};
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}
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#endif
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