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sortix--sortix/sortix/stream.h
Jonas 'Sortie' Termansen 9b79673dcb Initial version of Sortix.
2011-08-05 14:25:00 +02:00

88 lines
2.1 KiB
C++

/******************************************************************************
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along
with Sortix. If not, see <http://www.gnu.org/licenses/>.
stream.h
Various device types that provides a sequence of bytes.
******************************************************************************/
#ifndef SORTIX_STREAM_H
#define SORTIX_STREAM_H
namespace Sortix
{
class Device
{
public:
Device() { };
virtual ~Device() { }
public:
virtual void close() = 0;
};
class DevStream : public Device
{
public:
DevStream() { };
virtual ~DevStream() { }
public:
virtual size_t write(const void* buffer, size_t bufferSize) = 0;
virtual size_t readSome(const void* buffer, size_t bufferSize) = 0;
public:
inline size_t read(const void* buffer, size_t bufferSize)
{
const uint8_t* bytes = (uint8_t*) buffer;
size_t total = bufferSize;
while ( BufferSize > 0 )
{
size_t got = readSome(bytes, bufferSize);
if ( got == SIZE_MAX ) { return SIZE_MAX; }
bytes += got;
bufferSize -= got;
}
return total;
}
};
class DevBuffer : public DevStream
{
public:
DevBuffer() { };
virtual ~DevBuffer() { }
public:
virtual size_t write(const void* buffer, size_t bufferSize) = 0;
virtual size_t readSome(const void* buffer, size_t bufferSize) = 0;
public:
virtual size_t blockSize() = 0;
virtual intmax_t size() = 0;
virtual intmax_t position() = 0;
virtual bool seek(intmax_t position) = 0;
virtual bool resize(intmax_t size) = 0;
};
}
#endif