141 lines
4.4 KiB
C++
141 lines
4.4 KiB
C++
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
#include "lmp_f2c.h"
|
|
static integer c_n1 = -1;
|
|
int dorgbr_(char *vect, integer *m, integer *n, integer *k, doublereal *a, integer *lda,
|
|
doublereal *tau, doublereal *work, integer *lwork, integer *info, ftnlen vect_len)
|
|
{
|
|
integer a_dim1, a_offset, i__1, i__2, i__3;
|
|
integer i__, j, mn;
|
|
extern logical lsame_(char *, char *, ftnlen, ftnlen);
|
|
integer iinfo;
|
|
logical wantq;
|
|
extern int xerbla_(char *, integer *, ftnlen),
|
|
dorglq_(integer *, integer *, integer *, doublereal *, integer *, doublereal *,
|
|
doublereal *, integer *, integer *),
|
|
dorgqr_(integer *, integer *, integer *, doublereal *, integer *, doublereal *,
|
|
doublereal *, integer *, integer *);
|
|
integer lwkopt;
|
|
logical lquery;
|
|
a_dim1 = *lda;
|
|
a_offset = 1 + a_dim1;
|
|
a -= a_offset;
|
|
--tau;
|
|
--work;
|
|
*info = 0;
|
|
wantq = lsame_(vect, (char *)"Q", (ftnlen)1, (ftnlen)1);
|
|
mn = min(*m, *n);
|
|
lquery = *lwork == -1;
|
|
if (!wantq && !lsame_(vect, (char *)"P", (ftnlen)1, (ftnlen)1)) {
|
|
*info = -1;
|
|
} else if (*m < 0) {
|
|
*info = -2;
|
|
} else if (*n < 0 || wantq && (*n > *m || *n < min(*m, *k)) ||
|
|
!wantq && (*m > *n || *m < min(*n, *k))) {
|
|
*info = -3;
|
|
} else if (*k < 0) {
|
|
*info = -4;
|
|
} else if (*lda < max(1, *m)) {
|
|
*info = -6;
|
|
} else if (*lwork < max(1, mn) && !lquery) {
|
|
*info = -9;
|
|
}
|
|
if (*info == 0) {
|
|
work[1] = 1.;
|
|
if (wantq) {
|
|
if (*m >= *k) {
|
|
dorgqr_(m, n, k, &a[a_offset], lda, &tau[1], &work[1], &c_n1, &iinfo);
|
|
} else {
|
|
if (*m > 1) {
|
|
i__1 = *m - 1;
|
|
i__2 = *m - 1;
|
|
i__3 = *m - 1;
|
|
dorgqr_(&i__1, &i__2, &i__3, &a[a_offset], lda, &tau[1], &work[1], &c_n1,
|
|
&iinfo);
|
|
}
|
|
}
|
|
} else {
|
|
if (*k < *n) {
|
|
dorglq_(m, n, k, &a[a_offset], lda, &tau[1], &work[1], &c_n1, &iinfo);
|
|
} else {
|
|
if (*n > 1) {
|
|
i__1 = *n - 1;
|
|
i__2 = *n - 1;
|
|
i__3 = *n - 1;
|
|
dorglq_(&i__1, &i__2, &i__3, &a[a_offset], lda, &tau[1], &work[1], &c_n1,
|
|
&iinfo);
|
|
}
|
|
}
|
|
}
|
|
lwkopt = (integer)work[1];
|
|
lwkopt = max(lwkopt, mn);
|
|
}
|
|
if (*info != 0) {
|
|
i__1 = -(*info);
|
|
xerbla_((char *)"DORGBR", &i__1, (ftnlen)6);
|
|
return 0;
|
|
} else if (lquery) {
|
|
work[1] = (doublereal)lwkopt;
|
|
return 0;
|
|
}
|
|
if (*m == 0 || *n == 0) {
|
|
work[1] = 1.;
|
|
return 0;
|
|
}
|
|
if (wantq) {
|
|
if (*m >= *k) {
|
|
dorgqr_(m, n, k, &a[a_offset], lda, &tau[1], &work[1], lwork, &iinfo);
|
|
} else {
|
|
for (j = *m; j >= 2; --j) {
|
|
a[j * a_dim1 + 1] = 0.;
|
|
i__1 = *m;
|
|
for (i__ = j + 1; i__ <= i__1; ++i__) {
|
|
a[i__ + j * a_dim1] = a[i__ + (j - 1) * a_dim1];
|
|
}
|
|
}
|
|
a[a_dim1 + 1] = 1.;
|
|
i__1 = *m;
|
|
for (i__ = 2; i__ <= i__1; ++i__) {
|
|
a[i__ + a_dim1] = 0.;
|
|
}
|
|
if (*m > 1) {
|
|
i__1 = *m - 1;
|
|
i__2 = *m - 1;
|
|
i__3 = *m - 1;
|
|
dorgqr_(&i__1, &i__2, &i__3, &a[(a_dim1 << 1) + 2], lda, &tau[1], &work[1], lwork,
|
|
&iinfo);
|
|
}
|
|
}
|
|
} else {
|
|
if (*k < *n) {
|
|
dorglq_(m, n, k, &a[a_offset], lda, &tau[1], &work[1], lwork, &iinfo);
|
|
} else {
|
|
a[a_dim1 + 1] = 1.;
|
|
i__1 = *n;
|
|
for (i__ = 2; i__ <= i__1; ++i__) {
|
|
a[i__ + a_dim1] = 0.;
|
|
}
|
|
i__1 = *n;
|
|
for (j = 2; j <= i__1; ++j) {
|
|
for (i__ = j - 1; i__ >= 2; --i__) {
|
|
a[i__ + j * a_dim1] = a[i__ - 1 + j * a_dim1];
|
|
}
|
|
a[j * a_dim1 + 1] = 0.;
|
|
}
|
|
if (*n > 1) {
|
|
i__1 = *n - 1;
|
|
i__2 = *n - 1;
|
|
i__3 = *n - 1;
|
|
dorglq_(&i__1, &i__2, &i__3, &a[(a_dim1 << 1) + 2], lda, &tau[1], &work[1], lwork,
|
|
&iinfo);
|
|
}
|
|
}
|
|
}
|
|
work[1] = (doublereal)lwkopt;
|
|
return 0;
|
|
}
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|