LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtgsna()

lapack_int LAPACKE_dtgsna ( int  matrix_layout,
char  job,
char  howmny,
const lapack_logical select,
lapack_int  n,
const double *  a,
lapack_int  lda,
const double *  b,
lapack_int  ldb,
const double *  vl,
lapack_int  ldvl,
const double *  vr,
lapack_int  ldvr,
double *  s,
double *  dif,
lapack_int  mm,
lapack_int m 
)

Definition at line 36 of file lapacke_dtgsna.c.

42 {
43  lapack_int info = 0;
44  lapack_int lwork = -1;
45  lapack_int* iwork = NULL;
46  double* work = NULL;
47  double work_query;
48  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49  LAPACKE_xerbla( "LAPACKE_dtgsna", -1 );
50  return -1;
51  }
52 #ifndef LAPACK_DISABLE_NAN_CHECK
53  if( LAPACKE_get_nancheck() ) {
54  /* Optionally check input matrices for NaNs */
55  if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
56  return -6;
57  }
58  if( LAPACKE_dge_nancheck( matrix_layout, n, n, b, ldb ) ) {
59  return -8;
60  }
61  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
62  if( LAPACKE_dge_nancheck( matrix_layout, n, mm, vl, ldvl ) ) {
63  return -10;
64  }
65  }
66  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
67  if( LAPACKE_dge_nancheck( matrix_layout, n, mm, vr, ldvr ) ) {
68  return -12;
69  }
70  }
71  }
72 #endif
73  /* Allocate memory for working array(s) */
74  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
75  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n+6) );
76  if( iwork == NULL ) {
78  goto exit_level_0;
79  }
80  }
81  /* Query optimal working array(s) size */
82  info = LAPACKE_dtgsna_work( matrix_layout, job, howmny, select, n, a, lda, b,
83  ldb, vl, ldvl, vr, ldvr, s, dif, mm, m,
84  &work_query, lwork, iwork );
85  if( info != 0 ) {
86  goto exit_level_1;
87  }
88  lwork = (lapack_int)work_query;
89  /* Allocate memory for work arrays */
90  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
91  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
92  if( work == NULL ) {
94  goto exit_level_1;
95  }
96  }
97  /* Call middle-level interface */
98  info = LAPACKE_dtgsna_work( matrix_layout, job, howmny, select, n, a, lda, b,
99  ldb, vl, ldvl, vr, ldvr, s, dif, mm, m, work,
100  lwork, iwork );
101  /* Release memory and exit */
102  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
103  LAPACKE_free( work );
104  }
105 exit_level_1:
106  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
107  LAPACKE_free( iwork );
108  }
109 exit_level_0:
110  if( info == LAPACK_WORK_MEMORY_ERROR ) {
111  LAPACKE_xerbla( "LAPACKE_dtgsna", info );
112  }
113  return info;
114 }
#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_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#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_int LAPACKE_dtgsna_work(int matrix_layout, char job, char howmny, const lapack_logical *select, lapack_int n, const double *a, lapack_int lda, const double *b, lapack_int ldb, const double *vl, lapack_int ldvl, const double *vr, lapack_int ldvr, double *s, double *dif, lapack_int mm, lapack_int *m, double *work, lapack_int lwork, lapack_int *iwork)
int LAPACKE_get_nancheck()
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