/usr/include/spooles/Utilities/DVsort.h is in libspooles-dev 2.2-12+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*--------------------------------------------------------------------*/
/*
-----------------------------------------------------------
The insert and quick sort methods in this file are based on
Jon L. Bentley and M. Douglas McIlroy,
"Engineering a sort function",
Software -- Practice and Experience, vol 23(11), 1249-1265,
November 1993.
This quick sort method uses
1) a median of three medians to find a split value, and
2) split-end partitioning to handle many elements equal
to the split value.
-----------------------------------------------------------
*/
/*--------------------------------------------------------------------*/
/*
----------------------------------------------------------------
sort an array of doubles into ascending order using insert sort
created -- 95nov25, cca
----------------------------------------------------------------
*/
void
DVisortUp (
int n,
double dvec[]
) ;
/*
-----------------------------------------------------------------
sort an array of doubles into descending order using insert sort
created -- 95sep29, cca
-----------------------------------------------------------------
*/
void
DVisortDown (
int n,
double dvec[]
) ;
/*
------------------------------------------
use insert sort to sort a pair or arrays.
on output the first is in ascending order.
dvec1[] is the array of keys
dvec2[] is the companion array
example,
dvec1[] = 5 8 3 2 9
dvec2[] = 1 2 3 4 5
becomes
dvec1[] = 2 3 5 8 9
dvec2[] = 4 3 1 2 5
created -- 95nov25, cca
------------------------------------------
*/
void
DV2isortUp (
int n,
double dvec1[],
double dvec2[]
) ;
/*
-------------------------------------------
use insert sort to sort a pair or arrays.
on output the first is in descending order.
dvec1[] is the array of keys
dvec2[] is the companion array
example,
dvec1[] = 5 8 3 2 9
dvec2[] = 1 2 3 4 5
becomes
dvec1[] = 9 8 5 3 2
dvec2[] = 5 2 1 3 4
created -- 95sep29, cca
-------------------------------------------
*/
void
DV2isortDown (
int n,
double dvec1[],
double dvec2[]
) ;
/*
---------------------------------------------------------------
sort an array of doubles into ascending order using quick sort
created -- 95nov25, cca
---------------------------------------------------------------
*/
void
DVqsortUp (
int n,
double dvec[]
) ;
/*
----------------------------------------------------------------
sort an array of doubles into descending order using quick sort
created -- 95sep29, cca
----------------------------------------------------------------
*/
void
DVqsortDown (
int n,
double dvec[]
) ;
/*
------------------------------------------
use quick sort to sort a pair or arrays.
on output the first is in ascending order.
dvec1[] is the array of keys
dvec2[] is the companion array
example,
dvec1[] = 5 8 3 2 9
dvec2[] = 1 2 3 4 5
becomes
dvec1[] = 2 3 5 8 9
dvec2[] = 4 3 1 2 5
created -- 95sep29, cca
------------------------------------------
*/
void
DV2qsortUp (
int n,
double dvec1[],
double dvec2[]
) ;
/*
-------------------------------------------
use quick sort to sort a pair or arrays.
on output the first is in descending order.
dvec1[] is the array of keys
dvec2[] is the companion array
example,
dvec1[] = 5 8 3 2 9
dvec2[] = 1 2 3 4 5
becomes
dvec1[] = 9 8 5 3 2
dvec2[] = 5 2 1 3 4
created -- 95sep29, cca
-------------------------------------------
*/
void
DV2qsortDown (
int n,
double dvec1[],
double dvec2[]
) ;
/*
----------------------------------------------------
return 1 if elements in array are in ascending order
return 0 otherwise
created -- 95nov25, cca
----------------------------------------------------
*/
int
DVisascending (
int n,
double dvec[]
) ;
/*
-----------------------------------------------------
return 1 if elements in array are in descending order
return 0 otherwise
created -- 95sep29, cca
-----------------------------------------------------
*/
int
DVisdescending (
int n,
double dvec[]
) ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------
use insert sort to sort a pair of arrays.
on output the first is in ascending order.
dvec[] is the array of keys
ivec[] is the companion array
example,
ivec[] = 4 2 7 5 6
dvec[] = 5.0 8.0 3.0 2.0 9.0
becomes
ivec[] = 5 7 4 2 6
dvec[] = 2.0 3.0 5.0 8.0 9.0
created -- 97apr03, cca
------------------------------------------
*/
void
DVIVisortUp (
int n,
double dvec[],
int ivec[]
) ;
/*
-------------------------------------------
use insert sort to sort a pair or arrays.
on output the first is in descending order.
ivec[] is the array of keys
dvec[] is the companion array
example,
ivec[] = 4 2 7 5 6
dvec[] = 5.0 8.0 3.0 2.0 9.0
becomes
ivec[] = 5 7 4 2 6
dvec[] = 2.0 3.0 5.0 8.0 9.0
created -- 95sep29, cca
-------------------------------------------
*/
void
DVIVisortDown (
int n,
double dvec[],
int ivec[]
) ;
/*
------------------------------------------
use quick sort to sort a pair or arrays.
on output the first is in ascending order.
ivec[] is the array of keys
dvec[] is the companion array
example,
ivec[] = 4 2 7 5 6
dvec[] = 5.0 8.0 3.0 2.0 9.0
becomes
ivec[] = 5 7 4 2 6
dvec[] = 2.0 3.0 5.0 8.0 9.0
created -- 97apr03, cca
------------------------------------------
*/
void
DVIVqsortUp (
int n,
double dvec[],
int ivec[]
) ;
/*
-------------------------------------------
use quick sort to sort a pair or arrays.
on output the first is in descending order.
ivec[] is the array of keys
dvec[] is the companion array
example,
ivec[] = 4 2 7 5 6
dvec[] = 5.0 8.0 3.0 2.0 9.0
becomes
ivec[] = 5 7 4 2 6
dvec[] = 2.0 3.0 5.0 8.0 9.0
created -- 97apr03, cca
-------------------------------------------
*/
void
DVIVqsortDown (
int n,
double dvec[],
int ivec[]
) ;
/*--------------------------------------------------------------------*/
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