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#include "rb_lapack.h"
extern VOID dormhr_(char* side, char* trans, integer* m, integer* n, integer* ilo, integer* ihi, doublereal* a, integer* lda, doublereal* tau, doublereal* c, integer* ldc, doublereal* work, integer* lwork, integer* info);
static VALUE
rblapack_dormhr(int argc, VALUE *argv, VALUE self){
VALUE rblapack_side;
char side;
VALUE rblapack_trans;
char trans;
VALUE rblapack_ilo;
integer ilo;
VALUE rblapack_ihi;
integer ihi;
VALUE rblapack_a;
doublereal *a;
VALUE rblapack_tau;
doublereal *tau;
VALUE rblapack_c;
doublereal *c;
VALUE rblapack_lwork;
integer lwork;
VALUE rblapack_work;
doublereal *work;
VALUE rblapack_info;
integer info;
VALUE rblapack_c_out__;
doublereal *c_out__;
integer lda;
integer m;
integer ldc;
integer n;
VALUE rblapack_options;
if (argc > 0 && TYPE(argv[argc-1]) == T_HASH) {
argc--;
rblapack_options = argv[argc];
if (rb_hash_aref(rblapack_options, sHelp) == Qtrue) {
printf("%s\n", "USAGE:\n work, info, c = NumRu::Lapack.dormhr( side, trans, ilo, ihi, a, tau, c, [:lwork => lwork, :usage => usage, :help => help])\n\n\nFORTRAN MANUAL\n SUBROUTINE DORMHR( SIDE, TRANS, M, N, ILO, IHI, A, LDA, TAU, C, LDC, WORK, LWORK, INFO )\n\n* Purpose\n* =======\n*\n* DORMHR overwrites the general real M-by-N matrix C with\n*\n* SIDE = 'L' SIDE = 'R'\n* TRANS = 'N': Q * C C * Q\n* TRANS = 'T': Q**T * C C * Q**T\n*\n* where Q is a real orthogonal matrix of order nq, with nq = m if\n* SIDE = 'L' and nq = n if SIDE = 'R'. Q is defined as the product of\n* IHI-ILO elementary reflectors, as returned by DGEHRD:\n*\n* Q = H(ilo) H(ilo+1) . . . H(ihi-1).\n*\n\n* Arguments\n* =========\n*\n* SIDE (input) CHARACTER*1\n* = 'L': apply Q or Q**T from the Left;\n* = 'R': apply Q or Q**T from the Right.\n*\n* TRANS (input) CHARACTER*1\n* = 'N': No transpose, apply Q;\n* = 'T': Transpose, apply Q**T.\n*\n* M (input) INTEGER\n* The number of rows of the matrix C. M >= 0.\n*\n* N (input) INTEGER\n* The number of columns of the matrix C. N >= 0.\n*\n* ILO (input) INTEGER\n* IHI (input) INTEGER\n* ILO and IHI must have the same values as in the previous call\n* of DGEHRD. Q is equal to the unit matrix except in the\n* submatrix Q(ilo+1:ihi,ilo+1:ihi).\n* If SIDE = 'L', then 1 <= ILO <= IHI <= M, if M > 0, and\n* ILO = 1 and IHI = 0, if M = 0;\n* if SIDE = 'R', then 1 <= ILO <= IHI <= N, if N > 0, and\n* ILO = 1 and IHI = 0, if N = 0.\n*\n* A (input) DOUBLE PRECISION array, dimension\n* (LDA,M) if SIDE = 'L'\n* (LDA,N) if SIDE = 'R'\n* The vectors which define the elementary reflectors, as\n* returned by DGEHRD.\n*\n* LDA (input) INTEGER\n* The leading dimension of the array A.\n* LDA >= max(1,M) if SIDE = 'L'; LDA >= max(1,N) if SIDE = 'R'.\n*\n* TAU (input) DOUBLE PRECISION array, dimension\n* (M-1) if SIDE = 'L'\n* (N-1) if SIDE = 'R'\n* TAU(i) must contain the scalar factor of the elementary\n* reflector H(i), as returned by DGEHRD.\n*\n* C (input/output) DOUBLE PRECISION array, dimension (LDC,N)\n* On entry, the M-by-N matrix C.\n* On exit, C is overwritten by Q*C or Q**T*C or C*Q**T or C*Q.\n*\n* LDC (input) INTEGER\n* The leading dimension of the array C. LDC >= max(1,M).\n*\n* WORK (workspace/output) DOUBLE PRECISION array, dimension (MAX(1,LWORK))\n* On exit, if INFO = 0, WORK(1) returns the optimal LWORK.\n*\n* LWORK (input) INTEGER\n* The dimension of the array WORK.\n* If SIDE = 'L', LWORK >= max(1,N);\n* if SIDE = 'R', LWORK >= max(1,M).\n* For optimum performance LWORK >= N*NB if SIDE = 'L', and\n* LWORK >= M*NB if SIDE = 'R', where NB is the optimal\n* blocksize.\n*\n* If LWORK = -1, then a workspace query is assumed; the routine\n* only calculates the optimal size of the WORK array, returns\n* this value as the first entry of the WORK array, and no error\n* message related to LWORK is issued by XERBLA.\n*\n* INFO (output) INTEGER\n* = 0: successful exit\n* < 0: if INFO = -i, the i-th argument had an illegal value\n*\n\n* =====================================================================\n*\n* .. Local Scalars ..\n LOGICAL LEFT, LQUERY\n INTEGER I1, I2, IINFO, LWKOPT, MI, NB, NH, NI, NQ, NW\n* ..\n* .. External Functions ..\n LOGICAL LSAME\n INTEGER ILAENV\n EXTERNAL LSAME, ILAENV\n* ..\n* .. External Subroutines ..\n EXTERNAL DORMQR, XERBLA\n* ..\n* .. Intrinsic Functions ..\n INTRINSIC MAX, MIN\n* ..\n\n");
return Qnil;
}
if (rb_hash_aref(rblapack_options, sUsage) == Qtrue) {
printf("%s\n", "USAGE:\n work, info, c = NumRu::Lapack.dormhr( side, trans, ilo, ihi, a, tau, c, [:lwork => lwork, :usage => usage, :help => help])\n");
return Qnil;
}
} else
rblapack_options = Qnil;
if (argc != 7 && argc != 8)
rb_raise(rb_eArgError,"wrong number of arguments (%d for 7)", argc);
rblapack_side = argv[0];
rblapack_trans = argv[1];
rblapack_ilo = argv[2];
rblapack_ihi = argv[3];
rblapack_a = argv[4];
rblapack_tau = argv[5];
rblapack_c = argv[6];
if (argc == 8) {
rblapack_lwork = argv[7];
} else if (rblapack_options != Qnil) {
rblapack_lwork = rb_hash_aref(rblapack_options, ID2SYM(rb_intern("lwork")));
} else {
rblapack_lwork = Qnil;
}
side = StringValueCStr(rblapack_side)[0];
ilo = NUM2INT(rblapack_ilo);
if (!NA_IsNArray(rblapack_a))
rb_raise(rb_eArgError, "a (5th argument) must be NArray");
if (NA_RANK(rblapack_a) != 2)
rb_raise(rb_eArgError, "rank of a (5th argument) must be %d", 2);
lda = NA_SHAPE0(rblapack_a);
m = NA_SHAPE1(rblapack_a);
if (NA_TYPE(rblapack_a) != NA_DFLOAT)
rblapack_a = na_change_type(rblapack_a, NA_DFLOAT);
a = NA_PTR_TYPE(rblapack_a, doublereal*);
if (!NA_IsNArray(rblapack_c))
rb_raise(rb_eArgError, "c (7th argument) must be NArray");
if (NA_RANK(rblapack_c) != 2)
rb_raise(rb_eArgError, "rank of c (7th argument) must be %d", 2);
ldc = NA_SHAPE0(rblapack_c);
n = NA_SHAPE1(rblapack_c);
if (NA_TYPE(rblapack_c) != NA_DFLOAT)
rblapack_c = na_change_type(rblapack_c, NA_DFLOAT);
c = NA_PTR_TYPE(rblapack_c, doublereal*);
trans = StringValueCStr(rblapack_trans)[0];
if (!NA_IsNArray(rblapack_tau))
rb_raise(rb_eArgError, "tau (6th argument) must be NArray");
if (NA_RANK(rblapack_tau) != 1)
rb_raise(rb_eArgError, "rank of tau (6th argument) must be %d", 1);
if (NA_SHAPE0(rblapack_tau) != (m-1))
rb_raise(rb_eRuntimeError, "shape 0 of tau must be %d", m-1);
if (NA_TYPE(rblapack_tau) != NA_DFLOAT)
rblapack_tau = na_change_type(rblapack_tau, NA_DFLOAT);
tau = NA_PTR_TYPE(rblapack_tau, doublereal*);
ihi = NUM2INT(rblapack_ihi);
if (rblapack_lwork == Qnil)
lwork = lsame_(&side,"L") ? n : lsame_(&side,"R") ? m : 0;
else {
lwork = NUM2INT(rblapack_lwork);
}
{
na_shape_t shape[1];
shape[0] = MAX(1,lwork);
rblapack_work = na_make_object(NA_DFLOAT, 1, shape, cNArray);
}
work = NA_PTR_TYPE(rblapack_work, doublereal*);
{
na_shape_t shape[2];
shape[0] = ldc;
shape[1] = n;
rblapack_c_out__ = na_make_object(NA_DFLOAT, 2, shape, cNArray);
}
c_out__ = NA_PTR_TYPE(rblapack_c_out__, doublereal*);
MEMCPY(c_out__, c, doublereal, NA_TOTAL(rblapack_c));
rblapack_c = rblapack_c_out__;
c = c_out__;
dormhr_(&side, &trans, &m, &n, &ilo, &ihi, a, &lda, tau, c, &ldc, work, &lwork, &info);
rblapack_info = INT2NUM(info);
return rb_ary_new3(3, rblapack_work, rblapack_info, rblapack_c);
}
void
init_lapack_dormhr(VALUE mLapack, VALUE sH, VALUE sU, VALUE zero){
sHelp = sH;
sUsage = sU;
rblapack_ZERO = zero;
rb_define_module_function(mLapack, "dormhr", rblapack_dormhr, -1);
}
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