LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dgeqp3()

lapack_int LAPACKE_dgeqp3 ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
double *  a,
lapack_int  lda,
lapack_int jpvt,
double *  tau 
)

Definition at line 35 of file lapacke_dgeqp3.c.

38{
39 lapack_int info = 0;
40 lapack_int lwork = -1;
41 double* work = NULL;
42 double work_query;
43 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
44 LAPACKE_xerbla( "LAPACKE_dgeqp3", -1 );
45 return -1;
46 }
47#ifndef LAPACK_DISABLE_NAN_CHECK
48 if( LAPACKE_get_nancheck() ) {
49 /* Optionally check input matrices for NaNs */
50 if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
51 return -4;
52 }
53 }
54#endif
55 /* Query optimal working array(s) size */
56 info = LAPACKE_dgeqp3_work( matrix_layout, m, n, a, lda, jpvt, tau,
57 &work_query, lwork );
58 if( info != 0 ) {
59 goto exit_level_0;
60 }
61 lwork = (lapack_int)work_query;
62 /* Allocate memory for work arrays */
63 work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
64 if( work == NULL ) {
66 goto exit_level_0;
67 }
68 /* Call middle-level interface */
69 info = LAPACKE_dgeqp3_work( matrix_layout, m, n, a, lda, jpvt, tau, work,
70 lwork );
71 /* Release memory and exit */
72 LAPACKE_free( work );
73exit_level_0:
74 if( info == LAPACK_WORK_MEMORY_ERROR ) {
75 LAPACKE_xerbla( "LAPACKE_dgeqp3", info );
76 }
77 return info;
78}
#define lapack_int
Definition: lapack.h:87
#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
lapack_int LAPACKE_dgeqp3_work(int matrix_layout, lapack_int m, lapack_int n, double *a, lapack_int lda, lapack_int *jpvt, double *tau, double *work, lapack_int lwork)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#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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