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/*
* Copyright © 2008 Chris Wilson
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Chris Wilson
*
* Contributor(s):
* Chris Wilson <chris@chris-wilson.co.uk>
*/
/* This fragment implements a comb sort (specifically combsort11) */
#ifndef _HAVE_CAIRO_COMBSORT_NEWGAP
#define _HAVE_CAIRO_COMBSORT_NEWGAP
static inline unsigned int
_cairo_combsort_newgap (unsigned int gap)
{
gap = 10 * gap / 13;
if (gap == 9 || gap == 10)
gap = 11;
if (gap < 1)
gap = 1;
return gap;
}
#endif
#define CAIRO_COMBSORT_DECLARE(NAME, TYPE, CMP) \
static void \
NAME (TYPE *base, unsigned int nmemb) \
{ \
unsigned int gap = nmemb; \
unsigned int i, j; \
int swapped; \
do { \
gap = _cairo_combsort_newgap (gap); \
swapped = gap > 1; \
for (i = 0; i < nmemb-gap ; i++) { \
j = i + gap; \
if (CMP (base[i], base[j]) > 0 ) { \
TYPE tmp; \
tmp = base[i]; \
base[i] = base[j]; \
base[j] = tmp; \
swapped = 1; \
} \
} \
} while (swapped); \
}
#define CAIRO_COMBSORT_DECLARE_WITH_DATA(NAME, TYPE, CMP) \
static void \
NAME (TYPE *base, unsigned int nmemb, void *data) \
{ \
unsigned int gap = nmemb; \
unsigned int i, j; \
int swapped; \
do { \
gap = _cairo_combsort_newgap (gap); \
swapped = gap > 1; \
for (i = 0; i < nmemb-gap ; i++) { \
j = i + gap; \
if (CMP (base[i], base[j], data) > 0 ) { \
TYPE tmp; \
tmp = base[i]; \
base[i] = base[j]; \
base[j] = tmp; \
swapped = 1; \
} \
} \
} while (swapped); \
}