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/* Inline Functions for positions.{h,cc}.
Copyright (C) 1989-1998, 2000, 2002 Free Software Foundation, Inc.
Written by Douglas C. Schmidt <schmidt@ics.uci.edu>
and Bruno Haible <bruno@clisp.org>.
This file is part of GNU GPERF.
GNU GPERF is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU GPERF is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
// This needs:
//#include <string.h>
/* ---------------------------- Class Positions ---------------------------- */
/* Constructors. */
INLINE
Positions::Positions ()
: _size (0)
{
}
INLINE
Positions::Positions (int pos1)
: _size (1)
{
_positions[0] = pos1;
}
INLINE
Positions::Positions (int pos1, int pos2)
: _size (2)
{
_positions[0] = pos1;
_positions[1] = pos2;
}
/* Copy constructor. */
INLINE
Positions::Positions (const Positions& src)
: _size (src._size)
{
memcpy (_positions, src._positions, _size * sizeof (_positions[0]));
}
/* Assignment operator. */
INLINE Positions&
Positions::operator= (const Positions& src)
{
_size = src._size;
memcpy (_positions, src._positions, _size * sizeof (_positions[0]));
return *this;
}
/* Accessors. */
INLINE int
Positions::operator[] (unsigned int index) const
{
return _positions[index];
}
INLINE unsigned int
Positions::get_size () const
{
return _size;
}
/* Write access. */
INLINE unsigned char *
Positions::pointer ()
{
return _positions;
}
INLINE void
Positions::set_size (unsigned int size)
{
_size = size;
}
/* Sorts the array in reverse order.
Returns true if there are no duplicates, false otherwise. */
INLINE bool
Positions::sort ()
{
/* Bubble sort. */
bool duplicate_free = true;
unsigned char *base = _positions;
unsigned int len = _size;
for (unsigned int i = 1; i < len; i++)
{
unsigned int j;
int tmp;
for (j = i, tmp = base[j]; j > 0 && tmp >= base[j - 1]; j--)
if ((base[j] = base[j - 1]) == tmp) /* oh no, a duplicate!!! */
duplicate_free = false;
base[j] = tmp;
}
return duplicate_free;
}
/* ------------------------- Class PositionIterator ------------------------ */
/* Initializes an iterator through POSITIONS. */
INLINE
PositionIterator::PositionIterator (Positions const& positions)
: _set (positions),
_index (0)
{
}
/* Retrieves the next position, or EOS past the end. */
INLINE int
PositionIterator::next ()
{
return (_index < _set._size ? _set._positions[_index++] : EOS);
}
/* --------------------- Class PositionReverseIterator --------------------- */
/* Initializes an iterator through POSITIONS. */
INLINE
PositionReverseIterator::PositionReverseIterator (Positions const& positions)
: _set (positions),
_index (_set._size)
{
}
/* Retrieves the next position, or EOS past the end. */
INLINE int
PositionReverseIterator::next ()
{
return (_index > 0 ? _set._positions[--_index] : EOS);
}
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