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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@1 72102866-910b-0410-8b05-ffd578937521
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mccallum 1994-11-04 16:29:24 +00:00
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Source/objects/CircularArrayPrivate.h Normal file
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/* CircularArray definitions for the use of subclass implementations
Copyright (C) 1993,1994 Free Software Foundation, Inc.
Written by: R. Andrew McCallum <mccallum@gnu.ai.mit.edu>
Date: May 1993
This file is part of the GNU Objective C Class Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __CircularArrayPrivate_h_INCLUDE_GNU
#define __CircularArrayPrivate_h_INCLUDE_GNU
#include <objects/stdobjects.h>
#include <objects/ArrayPrivate.h>
#define CIRCULAR_TO_BASIC(INDEX) \
((INDEX + self->_start_index) % self->_capacity)
#define BASIC_TO_CIRCULAR(INDEX) \
((INDEX + self->_capacity - self->_start_index) % self->_capacity)
#define NEXT_CIRCULAR_INDEX(INDEX) \
((INDEX + 1) % self->_capacity)
#define PREV_CIRCULAR_INDEX(INDEX) \
((INDEX + self->_capacity - 1) % self->_capacity)
static inline void
circularMakeHoleAt(CircularArray *self, unsigned basicIndex)
{
int i;
if (self->_start_index && basicIndex > self->_start_index)
{
for (i = self->_start_index; i < basicIndex; i++)
self->_contents_array[i-1] = self->_contents_array[i];
}
else
{
for (i = CIRCULAR_TO_BASIC(self->_count-1); i >= basicIndex; i--)
self->_contents_array[i+1] = self->_contents_array[i];
}
/* This is never called with _count == 0 */
}
static inline void
circularFillHoleAt(CircularArray *self, unsigned basicIndex)
{
int i;
if (basicIndex > self->_start_index)
{
for (i = basicIndex; i > self->_start_index; i--)
self->_contents_array[i] = self->_contents_array[i-1];
}
else
{
for (i = basicIndex; i < CIRCULAR_TO_BASIC(self->_count-1); i++)
self->_contents_array[i] = self->_contents_array[i+1];
}
}
#endif /* __CircularArrayPrivate_h_INCLUDE_GNU */