You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
145 lines
3.9 KiB
145 lines
3.9 KiB
/* -*- C++ -*-
|
|
* Copyright (C) 2003 Thiago Macieira <thiago.macieira@kdemail.net>
|
|
*
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef KIOBUFFER_H
|
|
#define KIOBUFFER_H
|
|
|
|
#include <tqcstring.h>
|
|
|
|
#include <kdelibs_export.h>
|
|
|
|
class TQIODevice;
|
|
|
|
/**
|
|
* @class KIOBufferBase kiobuffer.h kiobuffer.h
|
|
* @brief base for I/O buffer implementation
|
|
*
|
|
* This class declares the base methods to interface with an I/O buffer.
|
|
* Most applications will not need to access this class directly, since
|
|
* it is all handled by @ref KNetwork::KBufferedSocket and other buffering
|
|
* classes.
|
|
*
|
|
* @author Thiago Macieira <thiago.macieira@kdemail.net>
|
|
*/
|
|
class KIOBufferBase
|
|
{
|
|
public:
|
|
/**
|
|
* Default constructor. Does nothing.
|
|
*/
|
|
KIOBufferBase()
|
|
{ }
|
|
|
|
/**
|
|
* Copy constructor. Does nothing here.
|
|
*/
|
|
KIOBufferBase(const KIOBufferBase& )
|
|
{ }
|
|
|
|
/**
|
|
* Virtual destructor. Does nothing.
|
|
*/
|
|
virtual ~KIOBufferBase()
|
|
{ }
|
|
|
|
/**
|
|
* Assignment operator. Does nothing.
|
|
*/
|
|
KIOBufferBase& operator=(const KIOBufferBase& )
|
|
{ return *this; }
|
|
|
|
/**
|
|
* Returns true if a line can be read from the buffer.
|
|
*/
|
|
virtual bool canReadLine() const = 0;
|
|
|
|
/**
|
|
* Reads a line from the buffer and discards it.
|
|
*/
|
|
virtual TQCString readLine() = 0;
|
|
|
|
/**
|
|
* Returns the number of bytes in the buffer. Note that this is not
|
|
* the size of the buffer.
|
|
*
|
|
* @sa size
|
|
*/
|
|
virtual Q_LONG length() const = 0;
|
|
|
|
/**
|
|
* Returns true if the buffer is empty of data.
|
|
*/
|
|
inline bool isEmpty() const
|
|
{ return length() == 0; }
|
|
|
|
/**
|
|
* Retrieves the buffer size. The value of -1 indicates that
|
|
* the buffer has no defined upper limit.
|
|
*
|
|
* @sa length for the length of the data stored
|
|
*/
|
|
virtual Q_LONG size() const = 0;
|
|
|
|
/**
|
|
* Returns true if the buffer is full (i.e., cannot receive more data)
|
|
*/
|
|
inline bool isFull() const
|
|
{ return size() != -1 && size() == length(); }
|
|
|
|
/**
|
|
* Sets the size of the buffer, if allowed.
|
|
*
|
|
* @param size the maximum size, use -1 for unlimited.
|
|
* @returns true on success, false if an error occurred.
|
|
* @note if the new size is less than length(), the buffer will be truncated
|
|
*/
|
|
virtual bool setSize(Q_LONG size) = 0;
|
|
|
|
/**
|
|
* Adds data to the end of the buffer.
|
|
*
|
|
* @param data the data to be added
|
|
* @param len the data length, in bytes
|
|
* @returns the number of bytes added to the end of the buffer.
|
|
*/
|
|
virtual Q_LONG feedBuffer(const char *data, Q_LONG len) = 0;
|
|
|
|
/**
|
|
* Consumes data from the beginning of the buffer.
|
|
*
|
|
* @param data where to copy the data to
|
|
* @param maxlen the maximum length to copy, in bytes
|
|
* @param discard if true, the bytes copied will be discarded
|
|
* @returns the number of bytes copied from the buffer
|
|
*/
|
|
virtual Q_LONG consumeBuffer(char *data, Q_LONG maxlen, bool discard = true) = 0;
|
|
|
|
/**
|
|
* Clears the buffer.
|
|
*/
|
|
virtual void clear() = 0;
|
|
};
|
|
|
|
#endif
|