LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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lapacke_dlansy.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

double LAPACKE_dlansy (int matrix_order, char norm, char uplo, lapack_int n, const double *a, lapack_int lda)

Function/Subroutine Documentation

double LAPACKE_dlansy ( int  matrix_order,
char  norm,
char  uplo,
lapack_int  n,
const double *  a,
lapack_int  lda 
)

Definition at line 36 of file lapacke_dlansy.c.

{
lapack_int info = 0;
double res = 0.;
double* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_dlansy", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_dsy_nancheck( matrix_order, uplo, n, a, lda ) ) {
return -5;
}
#endif
/* Allocate memory for working array(s) */
if( LAPACKE_lsame( norm, 'i' ) || LAPACKE_lsame( norm, '1' ) ||
LAPACKE_lsame( norm, '0' ) ) {
work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
if( work == NULL ) {
goto exit_level_0;
}
}
/* Call middle-level interface */
res = LAPACKE_dlansy_work( matrix_order, norm, uplo, n, a, lda, work );
/* Release memory and exit */
if( LAPACKE_lsame( norm, 'i' ) || LAPACKE_lsame( norm, '1' ) ||
LAPACKE_lsame( norm, '0' ) ) {
LAPACKE_free( work );
}
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_dlansy", info );
}
return res;
}

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