LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgeqpf()

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

Definition at line 36 of file lapacke_dgeqpf.c.

39 {
40  lapack_int info = 0;
41  double* work = NULL;
42  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
43  LAPACKE_xerbla( "LAPACKE_dgeqpf", -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 -4;
50  }
51 #endif
52  /* Allocate memory for working array(s) */
53  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
54  if( work == NULL ) {
56  goto exit_level_0;
57  }
58  /* Call middle-level interface */
59  info = LAPACKE_dgeqpf_work( matrix_layout, m, n, a, lda, jpvt, tau, work );
60  /* Release memory and exit */
61  LAPACKE_free( work );
62 exit_level_0:
63  if( info == LAPACK_WORK_MEMORY_ERROR ) {
64  LAPACKE_xerbla( "LAPACKE_dgeqpf", info );
65  }
66  return info;
67 }
#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_int LAPACKE_dgeqpf_work(int matrix_layout, lapack_int m, lapack_int n, double *a, lapack_int lda, lapack_int *jpvt, double *tau, double *work)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
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