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| /*
| * cblas_zhpr.c
| * The program is a C interface to zhpr.
| *
| * Keita Teranishi 3/23/98
| *
| */
| #include <stdio.h>
| #include <stdlib.h>
| #include "cblas.h"
| #include "cblas_f77.h"
| void cblas_zhpr(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
| const int N, const double 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;
| double *x=(double *)X, *xx=(double *)X, *tx, *st;
|
| 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_zhpr","Illegal Uplo setting, %d\n",Uplo );
| CBLAS_CallFromC = 0;
| RowMajorStrg = 0;
| return;
| }
| #ifdef F77_CHAR
| F77_UL = C2F_CHAR(&UL);
| #endif
|
| F77_zhpr(F77_UL, &F77_N, &alpha, X, &F77_incX, A);
|
| } else if (order == CblasRowMajor)
| {
| RowMajorStrg = 1;
| if (Uplo == CblasUpper) UL = 'L';
| else if (Uplo == CblasLower) UL = 'U';
| else
| {
| cblas_xerbla(2, "cblas_zhpr","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));
| 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 = (double *) X;
|
| F77_zhpr(F77_UL, &F77_N, &alpha, x, &F77_incX, A);
|
| } else
| {
| cblas_xerbla(1, "cblas_zhpr","Illegal Order setting, %d\n", order);
| CBLAS_CallFromC = 0;
| RowMajorStrg = 0;
| return;
| }
| if(X!=x)
| free(x);
| CBLAS_CallFromC = 0;
| RowMajorStrg = 0;
| return;
| }
|
|
