1/****************************************************************************
2** libebml : parse EBML files, see http://embl.sourceforge.net/
3**
4** <file/class description>
5**
6** Copyright (C) 2002-2004 Ingo Ralf Blum.  All rights reserved.
7**
8** This library is free software; you can redistribute it and/or
9** modify it under the terms of the GNU Lesser General Public
10** License as published by the Free Software Foundation; either
11** version 2.1 of the License, or (at your option) any later version.
12**
13** This library is distributed in the hope that it will be useful,
14** but WITHOUT ANY WARRANTY; without even the implied warranty of
15** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16** Lesser General Public License for more details.
17**
18** You should have received a copy of the GNU Lesser General Public
19** License along with this library; if not, write to the Free Software
20** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21**
22** See http://www.matroska.org/license/lgpl/ for LGPL licensing information.
23**
24** Contact license@matroska.org if any conditions of this licensing are
25** not clear to you.
26**
27**********************************************************************/
28
29/*!
30	\file
31	\version \$Id: StdIOCallback.h 1090 2005-03-16 12:47:59Z robux4 $
32*/
33#ifndef LIBEBML_STDIOCALLBACK_H
34#define LIBEBML_STDIOCALLBACK_H
35
36#include "IOCallback.h"
37
38#include <stdexcept>
39#include <cerrno>
40
41// ----- Added 10/15/2003 by jcsston from Zen -----
42#if defined (__BORLANDC__) //Maybe other compilers?
43  #include <errno.h>
44  #include <stdio.h>
45#endif //__BORLANDC__
46// ------------------------------------------------
47
48START_LIBEBML_NAMESPACE
49
50class EBML_DLL_API CRTError:public std::runtime_error
51{
52// Variablen...
53private:
54	int Error;
55
56// Methoden...
57public:
58	CRTError(int Error,const std::string&Description);
59	CRTError(const std::string&Description,int Error=errno);
60
61	int getError()const throw(){return Error;}
62};
63
64// This class is currently private to the library, so there's no MATROSKA_EXPORT.
65class EBML_DLL_API StdIOCallback:public IOCallback
66{
67    private:
68    	FILE*File;
69		uint64 mCurrentPosition;
70
71    public:
72//	StdIOCallback(const char*Path,const char*Mode);
73	StdIOCallback(const char*Path, const open_mode Mode);
74	virtual ~StdIOCallback()throw();
75
76	virtual uint32 read(void*Buffer,size_t Size);
77
78	// Seek to the specified position. The mode can have either SEEK_SET, SEEK_CUR
79	// or SEEK_END. The callback should return true(1) if the seek operation succeeded
80	// or false (0), when the seek fails.
81	virtual void setFilePointer(int64 Offset,seek_mode Mode=seek_beginning);
82
83	// This callback just works like its read pendant. It returns the number of bytes written.
84	virtual size_t write(const void*Buffer,size_t Size);
85
86	// Although the position is always positive, the return value of this callback is signed to
87	// easily allow negative values for returning errors. When an error occurs, the implementor
88	// should return -1 and the file pointer otherwise.
89	//
90	// If an error occurs, an exception should be thrown.
91	virtual uint64 getFilePointer();
92
93	// The close callback flushes the file buffers to disk and closes the file. When using the stdio
94	// library, this is equivalent to calling fclose. When the close is not successful, an exception
95	// should be thrown.
96	virtual void close();
97};
98
99END_LIBEBML_NAMESPACE
100
101#endif
102