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//Auto-generated by kalyptus. DO NOT EDIT.
package org.kde.koala;
import org.kde.qt.Qt;
import org.kde.qt.TQMetaObject;
import org.kde.qt.QtSupport;
/**
This abstract class implements basic functionality for buffered
input/output.
Through the available methods, you can find out how many bytes are
available for reading, how many are still unsent and you can peek at
the buffered data.
This class was intentionally written to resemble TQSocket, because
KExtendedSocket is a subclass of this one. This is so that applications
written using TQSocket's buffering characteristics will be more easily
ported to the more powerful KExtendedSocket class.
TDEBufferedIO already provides a powerful internal buffering algorithm. However,
this does not include the I/O itself, which must be implemented in
derived classes. Thus, to implement a class that does some I/O, you must
override, in addition to the pure TQIODevice methods, these two:
<li>
closeNow()
</li>
<li>
waitForMore()
</li>
If your derived class reimplements the buffering algorithm, you must then
decide which buffering functions to override. For instance, you may want to
change the protected functions like feedReadBuffer() and consumeReadBuffer().
See {@link TDEBufferedIOSignals} for signals emitted by TDEBufferedIO
@author Thiago Macieira <thiagom@mail.com>
@short Buffered I/O.
*/
public class TDEBufferedIO extends KAsyncIO {
protected TDEBufferedIO(Class dummy){super((Class) null);}
/**
The modes for closed() signal
@short The modes for closed() signal
*/
public static final int availRead = 0x01;
public static final int dirtyWrite = 0x02;
public static final int involuntary = 0x10;
public static final int delayed = 0x20;
public static final int closedNow = 0x40;
public native TQMetaObject metaObject();
public native String className();
/**
Closes the stream now, discarding the contents of the
write buffer. That is, we won't try to flush that
buffer before closing. If you want that buffer to be
flushed, you can call TQIODevice.flush(), which is blocking, and
then closeNow, or you can call TQIODevice.close() for a delayed
close.
@short Closes the stream now, discarding the contents of the write buffer.
*/
public native void closeNow();
/**
Sets the internal buffer size to value.
Not all implementations support this.
The parameters may be 0 to make the class unbuffered or -1
to let the class choose the size (which may be unlimited) or
-2 to leave the buffer size untouched.
Note that setting the write buffer size to any value smaller than
the current size of the buffer will force it to flush first,
which can make this call blocking.
The default implementation does not support setting the buffer
sizes. You can only call this function with values -1 for "don't care"
or -2 for "unchanged"
@param rsize the size of the read buffer
@param wsize the size of the write buffer
@return true if setting both was ok. If false is returned, the
buffers were left unchanged.
@short Sets the internal buffer size to value.
*/
public native boolean setBufferSize(int rsize, int wsize);
public native boolean setBufferSize(int rsize);
/**
Returns the number of bytes available for reading in the read buffer
@return the number of bytes available for reading
@short Returns the number of bytes available for reading in the read buffer
*/
public native int bytesAvailable();
/**
Waits for more data to be available and returns the amount of available data then.
@param msec number of milliseconds to wait, -1 to wait forever
@return -1 if we cannot wait (e.g., that doesn't make sense in this stream)
@short Waits for more data to be available and returns the amount of available data then.
*/
public native int waitForMore(int msec);
/**
Returns the number of bytes yet to write, still in the write buffer
@return the number of unwritten bytes in the write buffer
@short Returns the number of bytes yet to write, still in the write buffer
*/
public native int bytesToWrite();
/**
Checks whether there is enough data in the buffer to read a line
The default implementation reads directly from inBuf, so if your
implementation changes the meaning of that member, then you must override
this function.
@return true when there is enough data in the buffer to read a line
@short Checks whether there is enough data in the buffer to read a line
*/
public native boolean canReadLine();
/**
Reads into the user buffer at most maxlen bytes, but does not
consume that data from the read buffer. This is useful to check
whether we already have the needed data to process something.
This function may want to try and read more data from the system
provided it won't block.
@param data the user buffer pointer, at least maxlen bytes long
@param maxlen the maximum length to be peeked
@return the number of bytes actually copied.
@short Reads into the user buffer at most maxlen bytes, but does not consume that data from the read buffer.
*/
public native int peekBlock(String data, int maxlen);
/**
Unreads some data. That is, write the data to the beginning of the
read buffer, so that next calls to readBlock or peekBlock will see
this data instead.
Note not all devices implement this since this could mean a semantic
problem. For instance, sockets are sequential devices, so they won't
accept unreading.
@param data the data to be unread
@param len the size of the data
@return the number of bytes actually unread
@short Unreads some data.
*/
public native int unreadBlock(String data, int len);
}
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