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email-tracker/external/duckdb/extension/tpcds/dsdgen/dsdgen-c/permute.cpp
2025-10-24 19:21:19 -05:00

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/*
* Legal Notice
*
* This document and associated source code (the "Work") is a part of a
* benchmark specification maintained by the TPC.
*
* The TPC reserves all right, title, and interest to the Work as provided
* under U.S. and international laws, including without limitation all patent
* and trademark rights therein.
*
* No Warranty
*
* 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
* CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
* AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
* WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
* INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
* DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
* PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
* WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
* ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
* QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
* WITH REGARD TO THE WORK.
* 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
* ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
* COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
* OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
* INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
* OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
* RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
* ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
*
* Contributors:
* Gradient Systems
*/
#include "config.h"
#include "porting.h"
#ifndef USE_STDLIB_H
#include <malloc.h>
#endif
#include <stdio.h>
#include "genrand.h"
/*
* Routine: MakePermutation(int nSize)
* Purpose: Permute the integers in [1..nSize]
* Algorithm:
* Data Structures:
*
* Params:
* Returns:
* Called By:
* Calls:
* Assumptions:
* Side Effects:
* TODO: None
*/
int *makePermutation(int *nNumberSet, int nSize, int nStream) {
int i, nTemp, nIndex, *pInt;
if (nSize <= 0)
return (NULL);
if (!nNumberSet) {
nNumberSet = (int *)malloc(nSize * sizeof(int));
MALLOC_CHECK(nNumberSet);
pInt = nNumberSet;
for (i = 0; i < nSize; i++)
*pInt++ = i;
}
for (i = 0; i < nSize; i++) {
nIndex = genrand_integer(NULL, DIST_UNIFORM, 0, nSize - 1, 0, nStream);
nTemp = nNumberSet[i];
nNumberSet[i] = nNumberSet[nIndex];
nNumberSet[nIndex] = nTemp;
}
return (nNumberSet);
}
/*
* Routine: MakePermutation(int nSize)
* Purpose: Permute the integers in [1..nSize]
* Algorithm:
* Data Structures:
*
* Params:
* Returns:
* Called By:
* Calls:
* Assumptions:
* Side Effects:
* TODO: None
*/
ds_key_t *makeKeyPermutation(ds_key_t *nNumberSet, ds_key_t nSize, int nStream) {
ds_key_t i, nTemp, nIndex, *pInt;
if (nSize <= 0)
return (NULL);
if (!nNumberSet) {
nNumberSet = (ds_key_t *)malloc(nSize * sizeof(ds_key_t));
MALLOC_CHECK(nNumberSet);
pInt = nNumberSet;
for (i = 0; i < nSize; i++)
*pInt++ = i;
}
for (i = 0; i < nSize; i++) {
nIndex = genrand_key(NULL, DIST_UNIFORM, 0, nSize - 1, 0, nStream);
nTemp = nNumberSet[i];
nNumberSet[i] = nNumberSet[nIndex];
nNumberSet[nIndex] = nTemp;
}
return (nNumberSet);
}