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k3iobuffer.h

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00001 /*  -*- C++ -*-
00002  *  Copyright (C) 2003,2005 Thiago Macieira <thiago@kde.org>
00003  *
00004  *
00005  *  Permission is hereby granted, free of charge, to any person obtaining
00006  *  a copy of this software and associated documentation files (the
00007  *  "Software"), to deal in the Software without restriction, including
00008  *  without limitation the rights to use, copy, modify, merge, publish,
00009  *  distribute, sublicense, and/or sell copies of the Software, and to
00010  *  permit persons to whom the Software is furnished to do so, subject to
00011  *  the following conditions:
00012  *
00013  *  The above copyright notice and this permission notice shall be included
00014  *  in all copies or substantial portions of the Software.
00015  *
00016  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00017  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00018  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00019  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00020  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00021  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00022  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00023  */
00024 
00025 #ifndef KIOBUFFER_H
00026 #define KIOBUFFER_H
00027 
00028 #include <kdecore_export.h>
00029 #include <QtCore/QByteArray>
00030 
00031 
00044 class KDECORE_EXPORT KIOBufferBase //krazy:exclude=inline (mainly virtual; simple implementations; KDE3 compat)
00045 {
00046 public:
00050   KIOBufferBase()
00051   { }
00052 
00056   KIOBufferBase(const KIOBufferBase& )
00057   { }
00058 
00062   virtual ~KIOBufferBase()
00063   { }
00064 
00068   KIOBufferBase& operator=(const KIOBufferBase& )
00069   { return *this; }
00070 
00074   virtual bool canReadLine() const = 0;
00075 
00079   virtual qint64 readLine(char* data, qint64 maxlen) = 0;
00080 
00087   virtual qint64 length() const = 0;
00088 
00092   inline bool isEmpty() const
00093   { return length() == 0; }
00094 
00101   virtual qint64 size() const = 0;
00102 
00106   inline bool isFull() const
00107   { return size() != -1 && size() == length(); }
00108 
00116   virtual bool setSize(qint64 size) = 0;
00117 
00125   virtual qint64 feedBuffer(const char *data, qint64 len) = 0;
00126 
00135   virtual qint64 consumeBuffer(char *data, qint64 maxlen, bool discard = true) = 0;
00136 
00140   virtual void clear() = 0;
00141 };
00142 
00143 #endif

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