{
integer a_dim1, a_offset, c_dim1, c_offset, i__1, i__2;
integer i__, i1, i2, i3, ic, jc, mi, ni, nq;
doublereal aii;
logical left;
extern
int dlarf_(char *, integer *, integer *, doublereal *, integer *, doublereal *, doublereal *, integer *, doublereal *);
extern logical lsame_(char *, char *);
extern
int xerbla_(char *, integer *);
logical notran;
a_dim1 = *lda;
a_offset = 1 + a_dim1;
a -= a_offset;
--tau;
c_dim1 = *ldc;
c_offset = 1 + c_dim1;
c__ -= c_offset;
--work;
*info = 0;
left = lsame_(side, "L");
notran = lsame_(trans, "N");
if (left)
{
nq = *m;
}
else
{
nq = *n;
}
if (! left && ! lsame_(side, "R"))
{
*info = -1;
}
else if (! notran && ! lsame_(trans, "T"))
{
*info = -2;
}
else if (*m < 0)
{
*info = -3;
}
else if (*n < 0)
{
*info = -4;
}
else if (*k < 0 || *k > nq)
{
*info = -5;
}
else if (*lda < max(1,nq))
{
*info = -7;
}
else if (*ldc < max(1,*m))
{
*info = -10;
}
if (*info != 0)
{
i__1 = -(*info);
xerbla_("DORM2R", &i__1);
return 0;
}
if (*m == 0 || *n == 0 || *k == 0)
{
return 0;
}
if (left && ! notran || ! left && notran)
{
i1 = 1;
i2 = *k;
i3 = 1;
}
else
{
i1 = *k;
i2 = 1;
i3 = -1;
}
if (left)
{
ni = *n;
jc = 1;
}
else
{
mi = *m;
ic = 1;
}
i__1 = i2;
i__2 = i3;
for (i__ = i1;
i__2 < 0 ? i__ >= i__1 : i__ <= i__1;
i__ += i__2)
{
if (left)
{
mi = *m - i__ + 1;
ic = i__;
}
else
{
ni = *n - i__ + 1;
jc = i__;
}
aii = a[i__ + i__ * a_dim1];
a[i__ + i__ * a_dim1] = 1.;
dlarf_(side, &mi, &ni, &a[i__ + i__ * a_dim1], &c__1, &tau[i__], &c__[ ic + jc * c_dim1], ldc, &work[1]);
a[i__ + i__ * a_dim1] = aii;
}
return 0;
}