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//#include <iostream>
#include <string.h>
#include "MemPtr.hpp"
#include <stdio.h>
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
extern "C"
{
void zheev_(char *JOBZ, char *UPLO, int *N, double *A, int *LDA,
double *W, double *WORK, int *LWORK, double *RWORK, int *INFO, int len);
void cheev_(char *JOBZ, char *UPLO, int *N, float *A, int *LDA,
float *W, float *WORK, int *LWORK, float *RWORK, int *INFO, int len);
}
void toogo() {
for (int n=2;n<10;n++) {
double *a = new double[2*n*n];
memset(a,0,sizeof(double)*2*n*n);
a[0] = 1;
a[2] = 1;
a[3] = -1;
a[4] = 1;
a[5] = 1;
a[6] = 1;
char JOBZ = 'N';
char UPLO = 'U';
int N = n;
int LDA = n;
MemBlock<double> RWORK(MAX(1,3*N-2));
int LWORK;
int INFO;
double WORKSZE[2];
LWORK = -1;
double *d = new double[n];
zheev_(&JOBZ,&UPLO,&N,a,&LDA,d,WORKSZE,&LWORK,&RWORK,&INFO,1);
LWORK = (int) WORKSZE[0];
printf("LWORK = %d\n",LWORK);
MemBlock<double> WORK(2*LWORK);
zheev_(&JOBZ,&UPLO,&N,a,&LDA,d,&WORK,&LWORK,&RWORK,&INFO,1);
for (int i=0;i<n;i++) {
printf("eig[%d] = %f\n",i,d[i]);
}
delete a;
delete d;
}
}
void toogo2() {
for (int n=2;n<10;n++) {
float *a = new float[2*n*n];
memset(a,0,sizeof(float)*2*n*n);
a[0] = 1;
a[2] = 1;
a[3] = -1;
a[4] = 1;
a[5] = 1;
a[6] = 1;
char JOBZ = 'N';
char UPLO = 'U';
int N = n;
int LDA = n;
MemBlock<float> RWORK(MAX(1,3*N-2));
int LWORK;
int INFO;
float WORKSZE[2];
LWORK = -1;
float *d = new float[n];
cheev_(&JOBZ,&UPLO,&N,a,&LDA,d,WORKSZE,&LWORK,&RWORK,&INFO,1);
LWORK = (int) WORKSZE[0];
printf("LWORK = %d\n",LWORK);
MemBlock<float> WORK(2*LWORK);
cheev_(&JOBZ,&UPLO,&N,a,&LDA,d,&WORK,&LWORK,&RWORK,&INFO,1);
for (int i=0;i<n;i++) {
printf("eig[%d] = %f\n",i,d[i]);
}
delete a;
delete d;
}
}
int main(int argc, char*argv[]) {
toogo2();
toogo();
return 0;
}
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