mirror of
https://github.com/php/php-src.git
synced 2024-12-12 03:15:29 +08:00
308 lines
9.2 KiB
C
308 lines
9.2 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend Engine |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 2.00 of the Zend license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| http://www.zend.com/license/2_00.txt. |
|
|
| If you did not receive a copy of the Zend license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@zend.com so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: Xinchen Hui <laruence@php.net> |
|
|
| Sterling Hughes <sterling@php.net> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
#include "zend.h"
|
|
#include "zend_sort.h"
|
|
#include <limits.h>
|
|
|
|
static inline void zend_sort_2(void *a, void *b, compare_func_t cmp, swap_func_t swp) /* {{{ */ {
|
|
if (cmp(a, b) > 0) {
|
|
swp(a, b);
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
static inline void zend_sort_3(void *a, void *b, void *c, compare_func_t cmp, swap_func_t swp) /* {{{ */ {
|
|
if (!(cmp(a, b) > 0)) {
|
|
if (!(cmp(b, c) > 0)) {
|
|
return;
|
|
}
|
|
swp(b, c);
|
|
if (cmp(a, b) > 0) {
|
|
swp(a, b);
|
|
}
|
|
return;
|
|
}
|
|
if (!(cmp(c, b) > 0)) {
|
|
swp(a, c);
|
|
return;
|
|
}
|
|
swp(a, b);
|
|
if (cmp(b, c) > 0) {
|
|
swp(b, c);
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
static void zend_sort_4(void *a, void *b, void *c, void *d, compare_func_t cmp, swap_func_t swp) /* {{{ */ {
|
|
zend_sort_3(a, b, c, cmp, swp);
|
|
if (cmp(c, d) > 0) {
|
|
swp(c, d);
|
|
if (cmp(b, c) > 0) {
|
|
swp(b, c);
|
|
if (cmp(a, b) > 0) {
|
|
swp(a, b);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
static void zend_sort_5(void *a, void *b, void *c, void *d, void *e, compare_func_t cmp, swap_func_t swp) /* {{{ */ {
|
|
zend_sort_4(a, b, c, d, cmp, swp);
|
|
if (cmp(d, e) > 0) {
|
|
swp(d, e);
|
|
if (cmp(c, d) > 0) {
|
|
swp(c, d);
|
|
if (cmp(b, c) > 0) {
|
|
swp(b, c);
|
|
if (cmp(a, b) > 0) {
|
|
swp(a, b);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
ZEND_API void zend_insert_sort(void *base, size_t nmemb, size_t siz, compare_func_t cmp, swap_func_t swp) /* {{{ */{
|
|
switch (nmemb) {
|
|
case 0:
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
zend_sort_2(base, (char *)base + siz, cmp, swp);
|
|
break;
|
|
case 3:
|
|
zend_sort_3(base, (char *)base + siz, (char *)base + siz + siz, cmp, swp);
|
|
break;
|
|
case 4:
|
|
{
|
|
size_t siz2 = siz + siz;
|
|
zend_sort_4(base, (char *)base + siz, (char *)base + siz2, (char *)base + siz + siz2, cmp, swp);
|
|
}
|
|
break;
|
|
case 5:
|
|
{
|
|
size_t siz2 = siz + siz;
|
|
zend_sort_5(base, (char *)base + siz, (char *)base + siz2, (char *)base + siz + siz2, (char *)base + siz2 + siz2, cmp, swp);
|
|
}
|
|
break;
|
|
default:
|
|
{
|
|
char *i, *j, *k;
|
|
char *start = (char *)base;
|
|
char *end = start + (nmemb * siz);
|
|
size_t siz2= siz + siz;
|
|
char *sentry = start + (6 * siz);
|
|
for (i = start + siz; i < sentry; i += siz) {
|
|
j = i - siz;
|
|
if (!(cmp(j, i) > 0)) {
|
|
continue;
|
|
}
|
|
while (j != start) {
|
|
j -= siz;
|
|
if (!(cmp(j, i) > 0)) {
|
|
j += siz;
|
|
break;
|
|
}
|
|
}
|
|
for (k = i; k > j; k -= siz) {
|
|
swp(k, k - siz);
|
|
}
|
|
}
|
|
for (i = sentry; i < end; i += siz) {
|
|
j = i - siz;
|
|
if (!(cmp(j, i) > 0)) {
|
|
continue;
|
|
}
|
|
do {
|
|
j -= siz2;
|
|
if (!(cmp(j, i) > 0)) {
|
|
j += siz;
|
|
if (!(cmp(j, i) > 0)) {
|
|
j += siz;
|
|
}
|
|
break;
|
|
}
|
|
if (j == start) {
|
|
break;
|
|
}
|
|
if (j == start + siz) {
|
|
j -= siz;
|
|
if (cmp(i, j) > 0) {
|
|
j += siz;
|
|
}
|
|
break;
|
|
}
|
|
} while (1);
|
|
for (k = i; k > j; k -= siz) {
|
|
swp(k, k - siz);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ ZEND_API void zend_sort(void *base, size_t nmemb, size_t siz, compare_func_t cmp, swap_func_t swp)
|
|
*
|
|
* Derived from LLVM's libc++ implementation of std::sort.
|
|
*
|
|
* ===========================================================================
|
|
* libc++ License
|
|
* ===========================================================================
|
|
*
|
|
* The libc++ library is dual licensed under both the University of Illinois
|
|
* "BSD-Like" license and the MIT license. As a user of this code you may
|
|
* choose to use it under either license. As a contributor, you agree to allow
|
|
* your code to be used under both.
|
|
*
|
|
* Full text of the relevant licenses is included below.
|
|
*
|
|
* ===========================================================================
|
|
*
|
|
* University of Illinois/NCSA
|
|
* Open Source License
|
|
*
|
|
* Copyright (c) 2009-2012 by the contributors listed at
|
|
* http://llvm.org/svn/llvm-project/libcxx/trunk/CREDITS.TXT
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* Developed by:
|
|
*
|
|
* LLVM Team
|
|
*
|
|
* University of Illinois at Urbana-Champaign
|
|
*
|
|
* http://llvm.org
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal with the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimers.
|
|
*
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimers in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* * Neither the names of the LLVM Team, University of Illinois at
|
|
* Urbana-Champaign, nor the names of its contributors may be used to
|
|
* endorse or promote products derived from this Software without
|
|
* specific prior written permission.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* WITH THE SOFTWARE.
|
|
*
|
|
* ===========================================================================
|
|
*
|
|
* Copyright (c) 2009-2012 by the contributors listed at
|
|
* http://llvm.org/svn/llvm-project/libcxx/trunk/CREDITS.TXT
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal in the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
ZEND_API void zend_sort(void *base, size_t nmemb, size_t siz, compare_func_t cmp, swap_func_t swp)
|
|
{
|
|
while (1) {
|
|
if (nmemb <= 16) {
|
|
zend_insert_sort(base, nmemb, siz, cmp, swp);
|
|
return;
|
|
} else {
|
|
char *i, *j;
|
|
char *start = (char *)base;
|
|
char *end = start + (nmemb * siz);
|
|
size_t offset = (nmemb >> Z_L(1));
|
|
char *pivot = start + (offset * siz);
|
|
|
|
if ((nmemb >> Z_L(10))) {
|
|
size_t delta = (offset >> Z_L(1)) * siz;
|
|
zend_sort_5(start, start + delta, pivot, pivot + delta, end - siz, cmp, swp);
|
|
} else {
|
|
zend_sort_3(start, pivot, end - siz, cmp, swp);
|
|
}
|
|
swp(start + siz, pivot);
|
|
pivot = start + siz;
|
|
i = pivot + siz;
|
|
j = end - siz;
|
|
while (1) {
|
|
while (cmp(pivot, i) > 0) {
|
|
i += siz;
|
|
if (UNEXPECTED(i == j)) {
|
|
goto done;
|
|
}
|
|
}
|
|
j -= siz;
|
|
if (UNEXPECTED(j == i)) {
|
|
goto done;
|
|
}
|
|
while (cmp(j, pivot) > 0) {
|
|
j -= siz;
|
|
if (UNEXPECTED(j == i)) {
|
|
goto done;
|
|
}
|
|
}
|
|
swp(i, j);
|
|
i += siz;
|
|
if (UNEXPECTED(i == j)) {
|
|
goto done;
|
|
}
|
|
}
|
|
done:
|
|
swp(pivot, i - siz);
|
|
if ((i - siz) - start < end - i) {
|
|
zend_sort(start, (i - start)/siz - 1, siz, cmp, swp);
|
|
base = i;
|
|
nmemb = (end - i)/siz;
|
|
} else {
|
|
zend_sort(i, (end - i)/siz, siz, cmp, swp);
|
|
nmemb = (i - start)/siz - 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* }}} */
|