LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstebz()

lapack_int LAPACKE_dstebz ( char  range,
char  order,
lapack_int  n,
double  vl,
double  vu,
lapack_int  il,
lapack_int  iu,
double  abstol,
const double *  d,
const double *  e,
lapack_int m,
lapack_int nsplit,
double *  w,
lapack_int iblock,
lapack_int isplit 
)

Definition at line 36 of file lapacke_dstebz.c.

41 {
42  lapack_int info = 0;
43  lapack_int* iwork = NULL;
44  double* work = NULL;
45 #ifndef LAPACK_DISABLE_NAN_CHECK
46  /* Optionally check input matrices for NaNs */
47  if( LAPACKE_d_nancheck( 1, &abstol, 1 ) ) {
48  return -8;
49  }
50  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
51  return -9;
52  }
53  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
54  return -10;
55  }
56  if( LAPACKE_lsame( range, 'v' ) ) {
57  if( LAPACKE_d_nancheck( 1, &vl, 1 ) ) {
58  return -4;
59  }
60  }
61  if( LAPACKE_lsame( range, 'v' ) ) {
62  if( LAPACKE_d_nancheck( 1, &vu, 1 ) ) {
63  return -5;
64  }
65  }
66 #endif
67  /* Allocate memory for working array(s) */
68  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,3*n) );
69  if( iwork == NULL ) {
71  goto exit_level_0;
72  }
73  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,4*n) );
74  if( work == NULL ) {
76  goto exit_level_1;
77  }
78  /* Call middle-level interface */
79  info = LAPACKE_dstebz_work( range, order, n, vl, vu, il, iu, abstol, d, e,
80  m, nsplit, w, iblock, isplit, work, iwork );
81  /* Release memory and exit */
82  LAPACKE_free( work );
83 exit_level_1:
84  LAPACKE_free( iwork );
85 exit_level_0:
86  if( info == LAPACK_WORK_MEMORY_ERROR ) {
87  LAPACKE_xerbla( "LAPACKE_dstebz", info );
88  }
89  return info;
90 }
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
lapack_int LAPACKE_dstebz_work(char range, char order, lapack_int n, double vl, double vu, lapack_int il, lapack_int iu, double abstol, const double *d, const double *e, lapack_int *m, lapack_int *nsplit, double *w, lapack_int *iblock, lapack_int *isplit, double *work, lapack_int *iwork)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
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