102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
/****************************************************************************
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** libebml : parse EBML files, see http://embl.sourceforge.net/
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**
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** <file/class description>
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**
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** Copyright (C) 2002-2004 Ingo Ralf Blum. All rights reserved.
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**
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** This library is free software; you can redistribute it and/or
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** modify it under the terms of the GNU Lesser General Public
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** License as published by the Free Software Foundation; either
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** version 2.1 of the License, or (at your option) any later version.
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**
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** This library is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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** Lesser General Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public
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** License along with this library; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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**
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** See http://www.matroska.org/license/lgpl/ for LGPL licensing information.
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**
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** Contact license@matroska.org if any conditions of this licensing are
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** not clear to you.
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**
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**********************************************************************/
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/*!
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\file
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\version \$Id: StdIOCallback.h 1090 2005-03-16 12:47:59Z robux4 $
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*/
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#ifndef LIBEBML_STDIOCALLBACK_H
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#define LIBEBML_STDIOCALLBACK_H
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#include "IOCallback.h"
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#include <stdexcept>
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#include <cerrno>
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// ----- Added 10/15/2003 by jcsston from Zen -----
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#if defined (__BORLANDC__) //Maybe other compilers?
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#include <errno.h>
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#include <stdio.h>
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#endif //__BORLANDC__
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// ------------------------------------------------
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START_LIBEBML_NAMESPACE
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class EBML_DLL_API CRTError:public std::runtime_error
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{
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// Variablen...
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private:
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int Error;
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// Methoden...
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public:
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CRTError(int Error,const std::string&Description);
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CRTError(const std::string&Description,int Error=errno);
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int getError()const throw(){return Error;}
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};
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// This class is currently private to the library, so there's no MATROSKA_EXPORT.
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class EBML_DLL_API StdIOCallback:public IOCallback
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{
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private:
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FILE*File;
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uint64 mCurrentPosition;
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public:
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// StdIOCallback(const char*Path,const char*Mode);
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StdIOCallback(const char*Path, const open_mode Mode);
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virtual ~StdIOCallback()throw();
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virtual uint32 read(void*Buffer,size_t Size);
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// Seek to the specified position. The mode can have either SEEK_SET, SEEK_CUR
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// or SEEK_END. The callback should return true(1) if the seek operation succeeded
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// or false (0), when the seek fails.
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virtual void setFilePointer(int64 Offset,seek_mode Mode=seek_beginning);
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// This callback just works like its read pendant. It returns the number of bytes written.
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virtual size_t write(const void*Buffer,size_t Size);
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// Although the position is always positive, the return value of this callback is signed to
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// easily allow negative values for returning errors. When an error occurs, the implementor
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// should return -1 and the file pointer otherwise.
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//
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// If an error occurs, an exception should be thrown.
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virtual uint64 getFilePointer();
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// The close callback flushes the file buffers to disk and closes the file. When using the stdio
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// library, this is equivalent to calling fclose. When the close is not successful, an exception
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// should be thrown.
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virtual void close();
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};
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END_LIBEBML_NAMESPACE
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#endif
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