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/*
* cblas_zhpr2.c
* The program is a C interface to zhpr2.
*
* Keita Teranishi 5/20/98
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "cblas.h"
#include "cblas_f77.h"
void cblas_zhpr2(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
const int N,const void *alpha, const void *X,
const int incX,const void *Y, const int incY, void *Ap)
{
char UL;
#ifdef F77_CHAR
F77_CHAR F77_UL;
#else
#define F77_UL &UL
#endif
#ifdef F77_INT
F77_INT F77_N=N, F77_incX=incX, F77_incY=incY;
#else
#define F77_N N
#define F77_incX incx
#define F77_incY incy
#endif
int n, i, j, incx=incX, incy=incY;
double *x=(double *)X, *xx=(double *)X, *y=(double *)Y,
*yy=(double *)Y, *stx, *sty;
extern int CBLAS_CallFromC;
extern int RowMajorStrg;
RowMajorStrg = 0;
CBLAS_CallFromC = 1;
if (order == CblasColMajor)
{
if (Uplo == CblasLower) UL = 'L';
else if (Uplo == CblasUpper) UL = 'U';
else
{
cblas_xerbla(2, "cblas_zhpr2","Illegal Uplo setting, %d\n",Uplo );
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
#ifdef F77_CHAR
F77_UL = C2F_CHAR(&UL);
#endif
F77_zhpr2(F77_UL, &F77_N, alpha, X, &F77_incX, Y, &F77_incY, Ap);
} else if (order == CblasRowMajor)
{
RowMajorStrg = 1;
if (Uplo == CblasUpper) UL = 'L';
else if (Uplo == CblasLower) UL = 'U';
else
{
cblas_xerbla(2, "cblas_zhpr2","Illegal Uplo setting, %d\n", Uplo);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
#ifdef F77_CHAR
F77_UL = C2F_CHAR(&UL);
#endif
if (N > 0)
{
n = N << 1;
x = malloc(n*sizeof(double));
y = malloc(n*sizeof(double));
stx = x + n;
sty = y + n;
if( incX > 0 )
i = incX << 1;
else
i = incX *(-2);
if( incY > 0 )
j = incY << 1;
else
j = incY *(-2);
do
{
*x = *xx;
x[1] = -xx[1];
x += 2;
xx += i;
} while (x != stx);
do
{
*y = *yy;
y[1] = -yy[1];
y += 2;
yy += j;
}
while (y != sty);
x -= n;
y -= n;
#ifdef F77_INT
if(incX > 0 )
F77_incX = 1;
else
F77_incX = -1;
if(incY > 0 )
F77_incY = 1;
else
F77_incY = -1;
#else
if(incX > 0 )
incx = 1;
else
incx = -1;
if(incY > 0 )
incy = 1;
else
incy = -1;
#endif
} else
{
x = (double *) X;
y = (void *) Y;
}
F77_zhpr2(F77_UL, &F77_N, alpha, y, &F77_incY, x, &F77_incX, Ap);
}
else
{
cblas_xerbla(1, "cblas_zhpr2","Illegal Order setting, %d\n", order);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
if(X!=x)
free(x);
if(Y!=y)
free(y);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
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