LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgeqlf()

lapack_int LAPACKE_dgeqlf ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  tau 
)

Definition at line 35 of file lapacke_dgeqlf.c.

37 {
38  lapack_int info = 0;
39  lapack_int lwork = -1;
40  double* work = NULL;
41  double work_query;
42  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
43  LAPACKE_xerbla( "LAPACKE_dgeqlf", -1 );
44  return -1;
45  }
46 #ifndef LAPACK_DISABLE_NAN_CHECK
47  if( LAPACKE_get_nancheck() ) {
48  /* Optionally check input matrices for NaNs */
49  if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
50  return -4;
51  }
52  }
53 #endif
54  /* Query optimal working array(s) size */
55  info = LAPACKE_dgeqlf_work( matrix_layout, m, n, a, lda, tau, &work_query,
56  lwork );
57  if( info != 0 ) {
58  goto exit_level_0;
59  }
60  lwork = (lapack_int)work_query;
61  /* Allocate memory for work arrays */
62  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
63  if( work == NULL ) {
65  goto exit_level_0;
66  }
67  /* Call middle-level interface */
68  info = LAPACKE_dgeqlf_work( matrix_layout, m, n, a, lda, tau, work, lwork );
69  /* Release memory and exit */
70  LAPACKE_free( work );
71 exit_level_0:
72  if( info == LAPACK_WORK_MEMORY_ERROR ) {
73  LAPACKE_xerbla( "LAPACKE_dgeqlf", info );
74  }
75  return info;
76 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
lapack_int LAPACKE_dgeqlf_work(int matrix_layout, lapack_int m, lapack_int n, double *a, lapack_int lda, double *tau, double *work, lapack_int lwork)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
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