111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
/*
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* cblas_zher.c
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* The program is a C interface to zher.
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*
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* Keita Teranishi 5/20/98
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "cblas.h"
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#include "cblas_f77.h"
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void cblas_zher(const CBLAS_LAYOUT layout, const CBLAS_UPLO Uplo,
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const int N, const double alpha, const void *X, const int incX
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,void *A, const int lda)
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{
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char UL;
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#ifdef F77_CHAR
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F77_CHAR F77_UL;
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#else
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#define F77_UL &UL
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#endif
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#ifdef F77_INT
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F77_INT F77_N=N, F77_lda=lda, F77_incX=incX;
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#else
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#define F77_N N
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#define F77_lda lda
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#define F77_incX incx
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#endif
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int n, i, tincx, incx=incX;
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double *x=(double *)X, *xx=(double *)X, *tx, *st;
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extern int CBLAS_CallFromC;
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extern int RowMajorStrg;
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RowMajorStrg = 0;
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CBLAS_CallFromC = 1;
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if (layout == CblasColMajor)
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{
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if (Uplo == CblasLower) UL = 'L';
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else if (Uplo == CblasUpper) UL = 'U';
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else
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{
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cblas_xerbla(2, "cblas_zher","Illegal Uplo setting, %d\n",Uplo );
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CBLAS_CallFromC = 0;
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RowMajorStrg = 0;
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return;
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}
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#ifdef F77_CHAR
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F77_UL = C2F_CHAR(&UL);
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#endif
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F77_zher(F77_UL, &F77_N, &alpha, X, &F77_incX, A, &F77_lda);
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} else if (layout == CblasRowMajor)
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{
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RowMajorStrg = 1;
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if (Uplo == CblasUpper) UL = 'L';
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else if (Uplo == CblasLower) UL = 'U';
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else
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{
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cblas_xerbla(2, "cblas_zher","Illegal Uplo setting, %d\n", Uplo);
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CBLAS_CallFromC = 0;
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RowMajorStrg = 0;
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return;
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}
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#ifdef F77_CHAR
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F77_UL = C2F_CHAR(&UL);
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#endif
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if (N > 0)
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{
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n = N << 1;
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x = malloc(n*sizeof(double));
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tx = x;
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if( incX > 0 ) {
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i = incX << 1 ;
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tincx = 2;
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st= x+n;
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} else {
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i = incX *(-2);
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tincx = -2;
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st = x-2;
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x +=(n-2);
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}
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do
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{
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*x = *xx;
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x[1] = -xx[1];
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x += tincx ;
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xx += i;
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}
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while (x != st);
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x=tx;
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#ifdef F77_INT
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F77_incX = 1;
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#else
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incx = 1;
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#endif
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}
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else x = (double *) X;
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F77_zher(F77_UL, &F77_N, &alpha, x, &F77_incX, A, &F77_lda);
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} else cblas_xerbla(1, "cblas_zher", "Illegal layout setting, %d\n", layout);
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if(X!=x)
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free(x);
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CBLAS_CallFromC = 0;
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RowMajorStrg = 0;
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return;
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}
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