LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dlange()

double LAPACKE_dlange ( int  matrix_layout,
char  norm,
lapack_int  m,
lapack_int  n,
const double *  a,
lapack_int  lda 
)

Definition at line 36 of file lapacke_dlange.c.

38 {
39  lapack_int info = 0;
40  double res = 0.;
41  double* work = NULL;
42  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
43  LAPACKE_xerbla( "LAPACKE_dlange", -1 );
44  return -1;
45  }
46 #ifndef LAPACK_DISABLE_NAN_CHECK
47  /* Optionally check input matrices for NaNs */
48  if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
49  return -5;
50  }
51 #endif
52  /* Allocate memory for working array(s) */
53  if( LAPACKE_lsame( norm, 'i' ) ) {
54  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,m) );
55  if( work == NULL ) {
57  goto exit_level_0;
58  }
59  }
60  /* Call middle-level interface */
61  res = LAPACKE_dlange_work( matrix_layout, norm, m, n, a, lda, work );
62  /* Release memory and exit */
63  if( LAPACKE_lsame( norm, 'i' ) ) {
64  LAPACKE_free( work );
65  }
66 exit_level_0:
67  if( info == LAPACK_WORK_MEMORY_ERROR ) {
68  LAPACKE_xerbla( "LAPACKE_dlange", info );
69  }
70  return res;
71 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
double LAPACKE_dlange_work(int matrix_layout, char norm, lapack_int m, lapack_int n, const double *a, lapack_int lda, double *work)
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