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Replaced all instances of Nicira Networks(, Inc) to Nicira, Inc. Feature #10593 Signed-off-by: Raju Subramanian <rsubramanian@nicira.com> Signed-off-by: Ben Pfaff <blp@nicira.com>
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/* Copyright (c) 2009 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "sort.h"
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#include "random.h"
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static size_t
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partition(size_t p, size_t r,
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int (*compare)(size_t a, size_t b, void *aux),
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void (*swap)(size_t a, size_t b, void *aux),
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void *aux)
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{
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size_t x = r - 1;
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size_t i, j;
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i = p;
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for (j = p; j < x; j++) {
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if (compare(j, x, aux) <= 0) {
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swap(i++, j, aux);
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}
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}
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swap(i, x, aux);
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return i;
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}
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static void
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quicksort(size_t p, size_t r,
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int (*compare)(size_t a, size_t b, void *aux),
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void (*swap)(size_t a, size_t b, void *aux),
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void *aux)
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{
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size_t i, q;
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if (r - p < 2) {
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return;
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}
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i = random_range(r - p) + p;
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if (r - 1 != i) {
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swap(r - 1, i, aux);
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}
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q = partition(p, r, compare, swap, aux);
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quicksort(p, q, compare, swap, aux);
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quicksort(q, r, compare, swap, aux);
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}
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void
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sort(size_t count,
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int (*compare)(size_t a, size_t b, void *aux),
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void (*swap)(size_t a, size_t b, void *aux),
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void *aux)
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{
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quicksort(0, count, compare, swap, aux);
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}
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