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//------------------------------------------------------------------------------
// LG_qsort_2: sort a 2-by-n list of integers, using A[0:1][ ] as the key
//------------------------------------------------------------------------------
// LAGraph, (c) 2019-2022 by The LAGraph Contributors, All Rights Reserved.
// SPDX-License-Identifier: BSD-2-Clause
//
// For additional details (including references to third party source code and
// other files) see the LICENSE file or contact permission@sei.cmu.edu. See
// Contributors.txt for a full list of contributors. Created, in part, with
// funding and support from the U.S. Government (see Acknowledgments.txt file).
// DM22-0790
// Contributed by Timothy A. Davis, Texas A&M University
//------------------------------------------------------------------------------
#include "LG_internal.h"
// returns true if A [a] < B [b]
#define LG_lt(A,a,B,b) \
LG_lt_2 (A ## _0, A ## _1, a, B ## _0, B ## _1, b)
// argument list for calling a function
#define LG_arg(A) \
A ## _0, A ## _1
// argument list for calling a function, with offset
#define LG_arg_offset(A,x) \
A ## _0 + (x), A ## _1 + (x)
// argument list for defining a function
#define LG_args(A) \
int64_t *LG_RESTRICT A ## _0, \
int64_t *LG_RESTRICT A ## _1
// each entry has a 2-integer key
#define LG_K 2
// swap A [a] and A [b]
#define LG_swap(A,a,b) \
{ \
int64_t t0 = A ## _0 [a] ; A ## _0 [a] = A ## _0 [b] ; A ## _0 [b] = t0 ; \
int64_t t1 = A ## _1 [a] ; A ## _1 [a] = A ## _1 [b] ; A ## _1 [b] = t1 ; \
}
#define LG_partition LG_partition_2
#define LG_quicksort LG_quicksort_2
#include "LG_qsort_template.h"
void LG_qsort_2 // sort array A of size 2-by-n, using 2 keys (A [0:1][])
(
int64_t *LG_RESTRICT A_0, // size n array
int64_t *LG_RESTRICT A_1, // size n array
const int64_t n
)
{
uint64_t seed = n ;
LG_quicksort (LG_arg (A), n, &seed, NULL) ;
}