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#include "rb_lapack.h"
extern real cla_porpvgrw_(char* uplo, integer* ncols, complex* a, integer* lda, complex* af, integer* ldaf, complex* work);
static VALUE
rblapack_cla_porpvgrw(int argc, VALUE *argv, VALUE self){
#ifdef USEXBLAS
VALUE rblapack_uplo;
char uplo;
VALUE rblapack_ncols;
integer ncols;
VALUE rblapack_a;
complex *a;
VALUE rblapack_af;
complex *af;
VALUE rblapack_work;
complex *work;
VALUE rblapack___out__;
real __out__;
integer lda;
integer n;
integer ldaf;
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 __out__ = NumRu::Lapack.cla_porpvgrw( uplo, ncols, a, af, work, [:usage => usage, :help => help])\n\n\nFORTRAN MANUAL\n REAL FUNCTION CLA_PORPVGRW( UPLO, NCOLS, A, LDA, AF, LDAF, WORK )\n\n* Purpose\n* =======\n* \n* CLA_PORPVGRW computes the reciprocal pivot growth factor\n* norm(A)/norm(U). The \"max absolute element\" norm is used. If this is\n* much less than 1, the stability of the LU factorization of the\n* (equilibrated) matrix A could be poor. This also means that the\n* solution X, estimated condition numbers, and error bounds could be\n* unreliable.\n*\n\n* Arguments\n* =========\n*\n* UPLO (input) CHARACTER*1\n* = 'U': Upper triangle of A is stored;\n* = 'L': Lower triangle of A is stored.\n*\n* NCOLS (input) INTEGER\n* The number of columns of the matrix A. NCOLS >= 0.\n*\n* A (input) COMPLEX array, dimension (LDA,N)\n* On entry, the N-by-N matrix A.\n*\n* LDA (input) INTEGER\n* The leading dimension of the array A. LDA >= max(1,N).\n*\n* AF (input) COMPLEX array, dimension (LDAF,N)\n* The triangular factor U or L from the Cholesky factorization\n* A = U**T*U or A = L*L**T, as computed by CPOTRF.\n*\n* LDAF (input) INTEGER\n* The leading dimension of the array AF. LDAF >= max(1,N).\n*\n* WORK (input) COMPLEX array, dimension (2*N)\n*\n\n* =====================================================================\n*\n* .. Local Scalars ..\n INTEGER I, J\n REAL AMAX, UMAX, RPVGRW\n LOGICAL UPPER\n COMPLEX ZDUM\n* ..\n* .. External Functions ..\n EXTERNAL LSAME, CLASET\n LOGICAL LSAME\n* ..\n* .. Intrinsic Functions ..\n INTRINSIC ABS, MAX, MIN, REAL, AIMAG\n* ..\n* .. Statement Functions ..\n REAL CABS1\n* ..\n* .. Statement Function Definitions ..\n CABS1( ZDUM ) = ABS( REAL( ZDUM ) ) + ABS( AIMAG( ZDUM ) )\n* ..\n\n");
return Qnil;
}
if (rb_hash_aref(rblapack_options, sUsage) == Qtrue) {
printf("%s\n", "USAGE:\n __out__ = NumRu::Lapack.cla_porpvgrw( uplo, ncols, a, af, work, [:usage => usage, :help => help])\n");
return Qnil;
}
} else
rblapack_options = Qnil;
if (argc != 5 && argc != 5)
rb_raise(rb_eArgError,"wrong number of arguments (%d for 5)", argc);
rblapack_uplo = argv[0];
rblapack_ncols = argv[1];
rblapack_a = argv[2];
rblapack_af = argv[3];
rblapack_work = argv[4];
if (argc == 5) {
} else if (rblapack_options != Qnil) {
} else {
}
uplo = StringValueCStr(rblapack_uplo)[0];
if (!NA_IsNArray(rblapack_a))
rb_raise(rb_eArgError, "a (3th argument) must be NArray");
if (NA_RANK(rblapack_a) != 2)
rb_raise(rb_eArgError, "rank of a (3th argument) must be %d", 2);
lda = NA_SHAPE0(rblapack_a);
n = NA_SHAPE1(rblapack_a);
if (NA_TYPE(rblapack_a) != NA_SCOMPLEX)
rblapack_a = na_change_type(rblapack_a, NA_SCOMPLEX);
a = NA_PTR_TYPE(rblapack_a, complex*);
ncols = NUM2INT(rblapack_ncols);
if (!NA_IsNArray(rblapack_af))
rb_raise(rb_eArgError, "af (4th argument) must be NArray");
if (NA_RANK(rblapack_af) != 2)
rb_raise(rb_eArgError, "rank of af (4th argument) must be %d", 2);
ldaf = NA_SHAPE0(rblapack_af);
if (NA_SHAPE1(rblapack_af) != n)
rb_raise(rb_eRuntimeError, "shape 1 of af must be the same as shape 1 of a");
if (NA_TYPE(rblapack_af) != NA_SCOMPLEX)
rblapack_af = na_change_type(rblapack_af, NA_SCOMPLEX);
af = NA_PTR_TYPE(rblapack_af, complex*);
if (!NA_IsNArray(rblapack_work))
rb_raise(rb_eArgError, "work (5th argument) must be NArray");
if (NA_RANK(rblapack_work) != 1)
rb_raise(rb_eArgError, "rank of work (5th argument) must be %d", 1);
if (NA_SHAPE0(rblapack_work) != (2*n))
rb_raise(rb_eRuntimeError, "shape 0 of work must be %d", 2*n);
if (NA_TYPE(rblapack_work) != NA_SCOMPLEX)
rblapack_work = na_change_type(rblapack_work, NA_SCOMPLEX);
work = NA_PTR_TYPE(rblapack_work, complex*);
__out__ = cla_porpvgrw_(&uplo, &ncols, a, &lda, af, &ldaf, work);
rblapack___out__ = rb_float_new((double)__out__);
return rblapack___out__;
#else
return Qnil;
#endif
}
void
init_lapack_cla_porpvgrw(VALUE mLapack, VALUE sH, VALUE sU, VALUE zero){
sHelp = sH;
sUsage = sU;
rblapack_ZERO = zero;
rb_define_module_function(mLapack, "cla_porpvgrw", rblapack_cla_porpvgrw, -1);
}
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