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created miscfunc.h and .cc to separate some miscellaneous and special functions

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This commit is contained in:
Jiri Pittner 2024-03-20 17:25:21 +01:00
parent 9c666d2b5c
commit db964afe9f
7 changed files with 153 additions and 88 deletions
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4
Makefile.am
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@ -1,6 +1,6 @@
lib_LTLIBRARIES = libla.la
include_HEADERS = version.h simple.h vecmat3.h quaternion.h fortran.h cuda_la.h auxstorage.h davidson.h laerror.h mat.h qsort.h vec.h bisection.h diis.h la.h noncblas.h smat.h numbers.h bitvector.h fourindex.h la_traits.h la_random.h nonclass.h sparsemat.h sparsesmat.h csrmat.h conjgrad.h gmres.h matexp.h permutation.h polynomial.h contfrac.h graph.h reg.h regsurf.h
libla_la_SOURCES = simple.cc quaternion.cc vecmat3.cc vec.cc mat.cc smat.cc sparsemat.cc sparsesmat.cc csrmat.cc laerror.cc noncblas.cc numbers.cc bitvector.cc strassen.cc nonclass.cc cuda_la.cc fourindex.cc permutation.cc polynomial.cc contfrac.cc graph.cc la_random.cc reg.cc regsurf.cc
include_HEADERS = version.h miscfunc.h simple.h vecmat3.h quaternion.h fortran.h cuda_la.h auxstorage.h davidson.h laerror.h mat.h qsort.h vec.h bisection.h diis.h la.h noncblas.h smat.h numbers.h bitvector.h fourindex.h la_traits.h la_random.h nonclass.h sparsemat.h sparsesmat.h csrmat.h conjgrad.h gmres.h matexp.h permutation.h polynomial.h contfrac.h graph.h reg.h regsurf.h
libla_la_SOURCES = simple.cc miscfunc.cc quaternion.cc vecmat3.cc vec.cc mat.cc smat.cc sparsemat.cc sparsesmat.cc csrmat.cc laerror.cc noncblas.cc numbers.cc bitvector.cc strassen.cc nonclass.cc cuda_la.cc fourindex.cc permutation.cc polynomial.cc contfrac.cc graph.cc la_random.cc reg.cc regsurf.cc
nodist_libla_la_SOURCES = version.cc
check_PROGRAMS = t test tX test_reg test_regsurf
t_SOURCES = t.cc t2.cc

1
la.h
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@ -35,6 +35,7 @@
#include "matexp.h"
#include "noncblas.h"
#include "nonclass.h"
#include "miscfunc.h"
#include "permutation.h"
#include "qsort.h"
#include "smat.h"

113
miscfunc.cc Normal file
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@ -0,0 +1,113 @@
/*
LA: linear algebra C++ interface library
Copyright (C) 2024 Jiri Pittner <jiri.pittner@jh-inst.cas.cz> or <jiri@pittnerovi.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "miscfunc.h"
#include "laerror.h"
#include <stdio.h>
#include <stdint.h>
namespace LA {
#define MAXFACT 20
unsigned long long factorial(const int n)
{
static int ntop=20;
static unsigned long long a[MAXFACT+1]={1,1,2,6,24,120,720,5040,
40320,
362880,
3628800,
39916800ULL,
479001600ULL,
6227020800ULL,
87178291200ULL,
1307674368000ULL,
20922789888000ULL,
355687428096000ULL,
6402373705728000ULL,
121645100408832000ULL,
2432902008176640000ULL};
int j;
if (n < 0) laerror("negative argument of factorial");
if (n > MAXFACT) laerror("overflow in factorial");
while (ntop<n) {
j=ntop++;
a[ntop]=a[j]*ntop;
}
return a[n];
}
#define MAXBINOM 100
#define ibidxmaxeven(n) ((n-2)*(n-2)/4)
#define ibidx(n,k) (k-2+(n&1?(n-3)*(n-3)/4:(n/2-1)*(n/2-2)))
unsigned long long binom(int n, int k)
{
unsigned long long p,value;
int d;
static unsigned long long ibitab[ibidxmaxeven(MAXBINOM)]= /*only nontrivial are stored,
zero initialization by compiler assumed*/
{
6,
10,
15,20,
21,35,
28,56,70
};
if(k>n||k<0) return(0);
if(k>n/2) k=n-k;
if(k==0) return(1);
if(k==1) return(n);
int ind=0;
if(n<=MAXBINOM)
{
ind=ibidx(n,k);
if (ibitab[ind]) return ibitab[ind];
}
/* nonrecurent method used anyway */
d=n-k;
p=1;
for(;n>d;n--) p *= n;
value=p/factorial(k);
if(n<=MAXBINOM) ibitab[ind]=value;
return value;
}
#undef ibidx
#undef ibidxmaxeven
#undef MAXBINOM
unsigned long long longpow(unsigned long long x, int i)
{
if(i<0) return 0;
unsigned long long y=1;
do
{
if(i&1) y *= x;
i >>= 1;
if(i) x *= x;
}
while(i);
return y ;
}
}//namespace

35
miscfunc.h Normal file
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@ -0,0 +1,35 @@
/*
LA: linear algebra C++ interface library
Copyright (C) 2024 Jiri Pittner <jiri.pittner@jh-inst.cas.cz> or <jiri@pittnerovi.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _MISCFUNC_H
#define _MISCFUNC_H
namespace LA {
extern unsigned long long factorial(const int n);
extern unsigned long long binom(int n, int k);
extern unsigned long long longpow(unsigned long long x, int i);
}//namespace
#endif

84
permutation.cc
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@ -18,6 +18,7 @@
#include "vec.h"
#include "permutation.h"
#include "miscfunc.h"
#include <stdio.h>
#include <string.h>
#include <list>
@ -729,75 +730,6 @@ for(k=n-1; k>=0; --k)
*this = NRPerm(3,inv);
}
#define MAXFACT 20
PERM_RANK_TYPE factorial(const int n)
{
static int ntop=20;
static PERM_RANK_TYPE a[MAXFACT+1]={1,1,2,6,24,120,720,5040,
40320,
362880,
3628800,
39916800ULL,
479001600ULL,
6227020800ULL,
87178291200ULL,
1307674368000ULL,
20922789888000ULL,
355687428096000ULL,
6402373705728000ULL,
121645100408832000ULL,
2432902008176640000ULL};
int j;
if (n < 0) laerror("negative argument of factorial");
if (n > MAXFACT) laerror("overflow in factorial");
while (ntop<n) {
j=ntop++;
a[ntop]=a[j]*ntop;
}
return a[n];
}
#define MAXBINOM 100
#define ibidxmaxeven(n) ((n-2)*(n-2)/4)
#define ibidx(n,k) (k-2+(n&1?(n-3)*(n-3)/4:(n/2-1)*(n/2-2)))
PERM_RANK_TYPE binom(int n, int k)
{
PERM_RANK_TYPE p,value;
register int d;
static PERM_RANK_TYPE ibitab[ibidxmaxeven(MAXBINOM)]= /*only nontrivial are stored,
zero initialization by compiler assumed*/
{
6,
10,
15,20,
21,35,
28,56,70
};
if(k>n||k<0) return(0);
if(k>n/2) k=n-k;
if(k==0) return(1);
if(k==1) return(n);
int ind=0;
if(n<=MAXBINOM)
{
ind=ibidx(n,k);
if (ibitab[ind]) return ibitab[ind];
}
/* nonrecurent method used anyway */
d=n-k;
p=1;
for(;n>d;n--) p *= n;
value=p/factorial(k);
if(n<=MAXBINOM) ibitab[ind]=value;
return value;
}
#undef ibidx
#undef ibidxmaxeven
#undef MAXBINOM
template <typename T, typename R>
@ -1290,20 +1222,6 @@ this->clear();
for(int i=1; i<=nparts; ++i) (*this)[i]=x[i].size();
}
PERM_RANK_TYPE longpow(PERM_RANK_TYPE x, int i)
{
if(i<0) return 0;
PERM_RANK_TYPE y=1;
do
{
if(i&1) y *= x;
i >>= 1;
if(i) x *= x;
}
while(i);
return y ;
}
//aux for the recursive procedure
static PERM_RANK_TYPE partitioncount;

3
permutation.h
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@ -198,9 +198,6 @@ public:
extern PERM_RANK_TYPE factorial(const int n);
extern PERM_RANK_TYPE binom(int n, int k);
extern PERM_RANK_TYPE longpow(PERM_RANK_TYPE x, int i);
//permutations represented in the cycle format
template <typename T>

1
polynomial.cc
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@ -17,6 +17,7 @@
*/
#include "polynomial.h"
#include "miscfunc.h"
#include <stdio.h>
#include <string.h>
#include <math.h>