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/****************************************************************************
** $Id$
**
** Definition of Qt template library classes
**
** Created : 990128
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef QTL_H
#define QTL_H
#ifndef QT_H
#include "qtextstream.h"
#include "qstring.h"
#endif // QT_H
#ifndef QT_NO_TEXTSTREAM
template <class T>
class QTextOStreamIterator
{
protected:
QTextOStream& stream;
QString separator;
public:
QTextOStreamIterator( QTextOStream& s) : stream( s ) {}
QTextOStreamIterator( QTextOStream& s, const QString& sep )
: stream( s ), separator( sep ) {}
QTextOStreamIterator<T>& operator= ( const T& x ) {
stream << x;
if ( !separator.isEmpty() )
stream << separator;
return *this;
}
QTextOStreamIterator<T>& operator*() { return *this; }
QTextOStreamIterator<T>& operator++() { return *this; }
QTextOStreamIterator<T>& operator++(int) { return *this; }
};
#endif //QT_NO_TEXTSTREAM
template <class InputIterator, class OutputIterator>
inline OutputIterator qCopy( InputIterator _begin, InputIterator _end,
OutputIterator _dest )
{
while( _begin != _end )
*_dest++ = *_begin++;
return _dest;
}
template <class T>
inline void qSwap( T& _value1, T& _value2 )
{
T tmp = _value1;
_value1 = _value2;
_value2 = tmp;
}
template <class InputIterator>
inline void qBubbleSort( InputIterator b, InputIterator e )
{
// Goto last element;
InputIterator last = e;
--last;
// only one element or no elements ?
if ( last == b )
return;
// So we have at least two elements in here
while( b != last ) {
bool swapped = FALSE;
InputIterator swap_pos = b;
InputIterator x = e;
InputIterator y = x;
y--;
do {
--x;
--y;
if ( *x < *y ) {
swapped = TRUE;
qSwap( *x, *y );
swap_pos = y;
}
} while( y != b );
if ( !swapped )
return;
b = swap_pos;
b++;
}
}
template <class Container>
inline void qBubbleSort( Container &c )
{
qBubbleSort( c.begin(), c.end() );
}
template <class Value>
inline void qHeapSortPushDown( Value* heap, int first, int last )
{
int r = first;
while( r <= last/2 ) {
// Node r has only one child ?
if ( last == 2*r ) {
// Need for swapping ?
if ( heap[r] > heap[ 2*r ] )
qSwap( heap[r], heap[ 2*r ] );
// That's it ...
r = last;
} else { // Node has two children
if ( heap[r] > heap[ 2*r ] && heap[ 2*r ] <= heap[ 2*r+1 ] ) {
// Swap with left child
qSwap( heap[r], heap[ 2*r ] );
r *= 2;
} else if ( heap[r] > heap[ 2*r+1 ] &&
heap[ 2*r+1 ] < heap[ 2*r ] ) {
// Swap with right child
qSwap( heap[r], heap[ 2*r+1 ] );
r = 2*r+1;
} else {
// We are done
r = last;
}
}
}
}
template <class InputIterator, class Value>
inline void qHeapSortHelper( InputIterator b, InputIterator e, Value, uint n )
{
// Create the heap
InputIterator insert = b;
Value* realheap = new Value[ n ];
// Wow, what a fake. But I want the heap to be indexed as 1...n
Value* heap = realheap - 1;
int size = 0;
for( ; insert != e; ++insert ) {
heap[++size] = *insert;
int i = size;
while( i > 1 && heap[i] < heap[ i / 2 ] ) {
qSwap( heap[i], heap[ i / 2 ] );
i /= 2;
}
}
// Now do the sorting
for( uint i = n; i > 0; i-- ) {
*b++ = heap[1];
if ( i > 1 ) {
heap[1] = heap[i];
qHeapSortPushDown( heap, 1, (int)i - 1 );
}
}
delete[] realheap;
}
template <class InputIterator>
inline void qHeapSort( InputIterator b, InputIterator e )
{
// Empty ?
if ( b == e )
return;
// How many entries have to be sorted ?
InputIterator it = b;
uint n = 0;
while ( it != e ) {
++n;
++it;
}
// The second last parameter is a hack to retrieve the value type
// Do the real sorting here
qHeapSortHelper( b, e, *b, n );
}
template <class Container>
inline void qHeapSort( Container &c )
{
if ( c.isEmpty() )
return;
// The second last parameter is a hack to retrieve the value type
// Do the real sorting here
qHeapSortHelper( c.begin(), c.end(), *(c.begin()), c.count() );
}
#endif
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