LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgeqp3()

lapack_int LAPACKE_zgeqp3 ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_complex_double a,
lapack_int  lda,
lapack_int jpvt,
lapack_complex_double tau 
)

Definition at line 36 of file lapacke_zgeqp3.c.

39 {
40  lapack_int info = 0;
41  lapack_int lwork = -1;
42  double* rwork = NULL;
43  lapack_complex_double* work = NULL;
44  lapack_complex_double work_query;
45  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46  LAPACKE_xerbla( "LAPACKE_zgeqp3", -1 );
47  return -1;
48  }
49 #ifndef LAPACK_DISABLE_NAN_CHECK
50  if( LAPACKE_get_nancheck() ) {
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
53  return -4;
54  }
55  }
56 #endif
57  /* Allocate memory for working array(s) */
58  rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
59  if( rwork == NULL ) {
61  goto exit_level_0;
62  }
63  /* Query optimal working array(s) size */
64  info = LAPACKE_zgeqp3_work( matrix_layout, m, n, a, lda, jpvt, tau,
65  &work_query, lwork, rwork );
66  if( info != 0 ) {
67  goto exit_level_1;
68  }
69  lwork = LAPACK_Z2INT( work_query );
70  /* Allocate memory for work arrays */
71  work = (lapack_complex_double*)
72  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
73  if( work == NULL ) {
75  goto exit_level_1;
76  }
77  /* Call middle-level interface */
78  info = LAPACKE_zgeqp3_work( matrix_layout, m, n, a, lda, jpvt, tau, work,
79  lwork, rwork );
80  /* Release memory and exit */
81  LAPACKE_free( work );
82 exit_level_1:
83  LAPACKE_free( rwork );
84 exit_level_0:
85  if( info == LAPACK_WORK_MEMORY_ERROR ) {
86  LAPACKE_xerbla( "LAPACKE_zgeqp3", info );
87  }
88  return info;
89 }
#define LAPACK_Z2INT(x)
Definition: lapacke.h:117
#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 lapack_complex_double
Definition: lapacke.h:90
lapack_int LAPACKE_zgeqp3_work(int matrix_layout, lapack_int m, lapack_int n, lapack_complex_double *a, lapack_int lda, lapack_int *jpvt, lapack_complex_double *tau, lapack_complex_double *work, lapack_int lwork, double *rwork)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
lapack_logical LAPACKE_zge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *a, lapack_int lda)
int LAPACKE_get_nancheck()
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