LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_chseqr()

lapack_int LAPACKE_chseqr ( int  matrix_layout,
char  job,
char  compz,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
lapack_complex_float h,
lapack_int  ldh,
lapack_complex_float w,
lapack_complex_float z,
lapack_int  ldz 
)

Definition at line 35 of file lapacke_chseqr.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  lapack_complex_float* work = NULL;
44  lapack_complex_float work_query;
45  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46  LAPACKE_xerbla( "LAPACKE_chseqr", -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_cge_nancheck( matrix_layout, n, n, h, ldh ) ) {
53  return -7;
54  }
55  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
56  if( LAPACKE_cge_nancheck( matrix_layout, n, n, z, ldz ) ) {
57  return -10;
58  }
59  }
60  }
61 #endif
62  /* Query optimal working array(s) size */
63  info = LAPACKE_chseqr_work( matrix_layout, job, compz, n, ilo, ihi, h, ldh,
64  w, z, ldz, &work_query, lwork );
65  if( info != 0 ) {
66  goto exit_level_0;
67  }
68  lwork = LAPACK_C2INT( work_query );
69  /* Allocate memory for work arrays */
70  work = (lapack_complex_float*)
71  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
72  if( work == NULL ) {
74  goto exit_level_0;
75  }
76  /* Call middle-level interface */
77  info = LAPACKE_chseqr_work( matrix_layout, job, compz, n, ilo, ihi, h, ldh,
78  w, z, ldz, work, lwork );
79  /* Release memory and exit */
80  LAPACKE_free( work );
81 exit_level_0:
82  if( info == LAPACK_WORK_MEMORY_ERROR ) {
83  LAPACKE_xerbla( "LAPACKE_chseqr", info );
84  }
85  return info;
86 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_float
Definition: lapack.h:45
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACK_C2INT(x)
Definition: lapacke.h:49
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_int LAPACKE_chseqr_work(int matrix_layout, char job, char compz, lapack_int n, lapack_int ilo, lapack_int ihi, lapack_complex_float *h, lapack_int ldh, lapack_complex_float *w, lapack_complex_float *z, lapack_int ldz, lapack_complex_float *work, lapack_int lwork)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
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