LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ 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 35 of file lapacke_zgeqp3.c.

38{
39 lapack_int info = 0;
40 lapack_int lwork = -1;
41 double* rwork = NULL;
42 lapack_complex_double* work = NULL;
43 lapack_complex_double work_query;
44 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45 LAPACKE_xerbla( "LAPACKE_zgeqp3", -1 );
46 return -1;
47 }
48#ifndef LAPACK_DISABLE_NAN_CHECK
49 if( LAPACKE_get_nancheck() ) {
50 /* Optionally check input matrices for NaNs */
51 if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
52 return -4;
53 }
54 }
55#endif
56 /* Allocate memory for working array(s) */
57 rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
58 if( rwork == NULL ) {
60 goto exit_level_0;
61 }
62 /* Query optimal working array(s) size */
63 info = LAPACKE_zgeqp3_work( matrix_layout, m, n, a, lda, jpvt, tau,
64 &work_query, lwork, rwork );
65 if( info != 0 ) {
66 goto exit_level_1;
67 }
68 lwork = LAPACK_Z2INT( work_query );
69 /* Allocate memory for work arrays */
70 work = (lapack_complex_double*)
71 LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
72 if( work == NULL ) {
74 goto exit_level_1;
75 }
76 /* Call middle-level interface */
77 info = LAPACKE_zgeqp3_work( matrix_layout, m, n, a, lda, jpvt, tau, work,
78 lwork, rwork );
79 /* Release memory and exit */
80 LAPACKE_free( work );
81exit_level_1:
82 LAPACKE_free( rwork );
83exit_level_0:
84 if( info == LAPACK_WORK_MEMORY_ERROR ) {
85 LAPACKE_xerbla( "LAPACKE_zgeqp3", info );
86 }
87 return info;
88}
#define lapack_int
Definition: lapack.h:87
#define lapack_complex_double
Definition: lapack.h:64
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 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)
#define LAPACK_Z2INT(x)
Definition: lapacke.h:50
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_zge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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