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#include "rb_lapack.h"
extern VOID slasq5_(integer* i0, integer* n0, real* z, integer* pp, real* tau, real* dmin, real* dmin1, real* dmin2, real* dn, real* dnm1, real* dnm2, logical* ieee);
static VALUE
rblapack_slasq5(int argc, VALUE *argv, VALUE self){
VALUE rblapack_i0;
integer i0;
VALUE rblapack_n0;
integer n0;
VALUE rblapack_z;
real *z;
VALUE rblapack_pp;
integer pp;
VALUE rblapack_tau;
real tau;
VALUE rblapack_ieee;
logical ieee;
VALUE rblapack_dmin;
real dmin;
VALUE rblapack_dmin1;
real dmin1;
VALUE rblapack_dmin2;
real dmin2;
VALUE rblapack_dn;
real dn;
VALUE rblapack_dnm1;
real dnm1;
VALUE rblapack_dnm2;
real dnm2;
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 dmin, dmin1, dmin2, dn, dnm1, dnm2 = NumRu::Lapack.slasq5( i0, n0, z, pp, tau, ieee, [:usage => usage, :help => help])\n\n\nFORTRAN MANUAL\n SUBROUTINE SLASQ5( I0, N0, Z, PP, TAU, DMIN, DMIN1, DMIN2, DN, DNM1, DNM2, IEEE )\n\n* Purpose\n* =======\n*\n* SLASQ5 computes one dqds transform in ping-pong form, one\n* version for IEEE machines another for non IEEE machines.\n*\n\n* Arguments\n* =========\n*\n* I0 (input) INTEGER\n* First index.\n*\n* N0 (input) INTEGER\n* Last index.\n*\n* Z (input) REAL array, dimension ( 4*N )\n* Z holds the qd array. EMIN is stored in Z(4*N0) to avoid\n* an extra argument.\n*\n* PP (input) INTEGER\n* PP=0 for ping, PP=1 for pong.\n*\n* TAU (input) REAL\n* This is the shift.\n*\n* DMIN (output) REAL\n* Minimum value of d.\n*\n* DMIN1 (output) REAL\n* Minimum value of d, excluding D( N0 ).\n*\n* DMIN2 (output) REAL\n* Minimum value of d, excluding D( N0 ) and D( N0-1 ).\n*\n* DN (output) REAL\n* d(N0), the last value of d.\n*\n* DNM1 (output) REAL\n* d(N0-1).\n*\n* DNM2 (output) REAL\n* d(N0-2).\n*\n* IEEE (input) LOGICAL\n* Flag for IEEE or non IEEE arithmetic.\n*\n\n* =====================================================================\n*\n* .. Parameter ..\n REAL ZERO\n PARAMETER ( ZERO = 0.0E0 )\n* ..\n* .. Local Scalars ..\n INTEGER J4, J4P2\n REAL D, EMIN, TEMP\n* ..\n* .. Intrinsic Functions ..\n INTRINSIC MIN\n* ..\n\n");
return Qnil;
}
if (rb_hash_aref(rblapack_options, sUsage) == Qtrue) {
printf("%s\n", "USAGE:\n dmin, dmin1, dmin2, dn, dnm1, dnm2 = NumRu::Lapack.slasq5( i0, n0, z, pp, tau, ieee, [:usage => usage, :help => help])\n");
return Qnil;
}
} else
rblapack_options = Qnil;
if (argc != 6 && argc != 6)
rb_raise(rb_eArgError,"wrong number of arguments (%d for 6)", argc);
rblapack_i0 = argv[0];
rblapack_n0 = argv[1];
rblapack_z = argv[2];
rblapack_pp = argv[3];
rblapack_tau = argv[4];
rblapack_ieee = argv[5];
if (argc == 6) {
} else if (rblapack_options != Qnil) {
} else {
}
i0 = NUM2INT(rblapack_i0);
pp = NUM2INT(rblapack_pp);
ieee = (rblapack_ieee == Qtrue);
n0 = NUM2INT(rblapack_n0);
tau = (real)NUM2DBL(rblapack_tau);
if (!NA_IsNArray(rblapack_z))
rb_raise(rb_eArgError, "z (3th argument) must be NArray");
if (NA_RANK(rblapack_z) != 1)
rb_raise(rb_eArgError, "rank of z (3th argument) must be %d", 1);
if (NA_SHAPE0(rblapack_z) != (4*n0))
rb_raise(rb_eRuntimeError, "shape 0 of z must be %d", 4*n0);
if (NA_TYPE(rblapack_z) != NA_SFLOAT)
rblapack_z = na_change_type(rblapack_z, NA_SFLOAT);
z = NA_PTR_TYPE(rblapack_z, real*);
slasq5_(&i0, &n0, z, &pp, &tau, &dmin, &dmin1, &dmin2, &dn, &dnm1, &dnm2, &ieee);
rblapack_dmin = rb_float_new((double)dmin);
rblapack_dmin1 = rb_float_new((double)dmin1);
rblapack_dmin2 = rb_float_new((double)dmin2);
rblapack_dn = rb_float_new((double)dn);
rblapack_dnm1 = rb_float_new((double)dnm1);
rblapack_dnm2 = rb_float_new((double)dnm2);
return rb_ary_new3(6, rblapack_dmin, rblapack_dmin1, rblapack_dmin2, rblapack_dn, rblapack_dnm1, rblapack_dnm2);
}
void
init_lapack_slasq5(VALUE mLapack, VALUE sH, VALUE sU, VALUE zero){
sHelp = sH;
sUsage = sU;
rblapack_ZERO = zero;
rb_define_module_function(mLapack, "slasq5", rblapack_slasq5, -1);
}
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