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71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
/*
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Copyright (c) 2001, Loki software, inc.
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modifications (c) 2001, Id software, inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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Neither the name of Loki software nor the names of its contributors may be used
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to endorse or promote products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT,INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ISTREAM_H_
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#define _ISTREAM_H_
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/*!
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API for data streams
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Based on an initial implementation by Loki software
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modified to be abstracted and shared across modules
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NOTE: why IDataStream and not IStream? because IStream is defined in windows IDL headers
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*/
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class IDataStream
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{
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public:
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IDataStream();
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virtual ~IDataStream();
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virtual void IncRef() = 0; ///< Increment the number of references to this object
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virtual void DecRef() = 0; ///< Decrement the reference count
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virtual unsigned long GetPosition() const = 0;
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virtual unsigned long Seek( long lOff, int nFrom ) = 0;
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virtual void SetLength( unsigned long nNewLen ) = 0;
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virtual unsigned long GetLength() const = 0;
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virtual char* ReadString( char* pBuf, unsigned long nMax ) = 0;
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virtual unsigned long Read( void* pBuf, unsigned long nCount ) = 0;
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virtual unsigned long Write( const void* pBuf, unsigned long nCount ) = 0;
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virtual int GetChar() = 0;
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virtual int PutChar( int c ) = 0;
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virtual void printf( const char*, ... ) = 0; ///< completely matches the usual printf behaviour
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virtual void Abort() = 0;
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virtual void Flush() = 0;
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virtual void Close() = 0;
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};
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#endif // _ISTREAM_H_
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