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/*
* cblas_chpr.c
* The program is a C interface to chpr.
*
* Keita Teranishi 3/23/98
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "cblas.h"
#include "cblas_f77.h"
void cblas_chpr(const CBLAS_LAYOUT layout, const CBLAS_UPLO Uplo,
const int N, const float alpha, const void *X,
const int incX, void *A)
{
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;
#else
#define F77_N N
#define F77_incX incx
#endif
int n, i, tincx, incx=incX;
float *x=(float *)X, *xx=(float *)X, *tx, *st;
extern int CBLAS_CallFromC;
extern int RowMajorStrg;
RowMajorStrg = 0;
CBLAS_CallFromC = 1;
if (layout == CblasColMajor)
{
if (Uplo == CblasLower) UL = 'L';
else if (Uplo == CblasUpper) UL = 'U';
else
{
cblas_xerbla(2, "cblas_chpr","Illegal Uplo setting, %d\n",Uplo );
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
#ifdef F77_CHAR
F77_UL = C2F_CHAR(&UL);
#endif
F77_chpr(F77_UL, &F77_N, &alpha, X, &F77_incX, A);
} else if (layout == CblasRowMajor)
{
RowMajorStrg = 1;
if (Uplo == CblasUpper) UL = 'L';
else if (Uplo == CblasLower) UL = 'U';
else
{
cblas_xerbla(2, "cblas_chpr","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(float));
tx = x;
if( incX > 0 ) {
i = incX << 1;
tincx = 2;
st= x+n;
} else {
i = incX *(-2);
tincx = -2;
st = x-2;
x +=(n-2);
}
do
{
*x = *xx;
x[1] = -xx[1];
x += tincx ;
xx += i;
}
while (x != st);
x=tx;
#ifdef F77_INT
F77_incX = 1;
#else
incx = 1;
#endif
}
else x = (float *) X;
F77_chpr(F77_UL, &F77_N, &alpha, x, &F77_incX, A);
} else
{
cblas_xerbla(1, "cblas_chpr","Illegal layout setting, %d\n", layout);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
if(X!=x)
free(x);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
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