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/*
sum.c
Ruby/GSL: Ruby extension library for GSL (GNU Scientific Library)
(C) Copyright 2001-2006 by Yoshiki Tsunesada
Ruby/GSL is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY.
*/
#include "include/rb_gsl_array.h"
#include <gsl/gsl_sum.h>
static VALUE rb_gsl_sum_accel(VALUE obj)
{
gsl_sum_levin_u_workspace *w = NULL;
double sum, err, sum_plain, *ptr;
size_t terms_used, n, stride;
ptr = get_vector_ptr(obj, &stride, &n);
w = gsl_sum_levin_u_alloc(n);
gsl_sum_levin_u_accel(ptr, n, w, &sum, &err);
sum_plain = w->sum_plain;
terms_used = w->terms_used;
gsl_sum_levin_u_free(w);
return rb_ary_new3(4, rb_float_new(sum), rb_float_new(err),
rb_float_new(sum_plain), INT2FIX(terms_used));
}
static VALUE rb_gsl_utrunc_accel(VALUE obj)
{
gsl_sum_levin_utrunc_workspace *w = NULL;
double sum, err, sum_plain, *ptr;
size_t terms_used, n, stride;
ptr = get_vector_ptr(obj, &stride, &n);
w = gsl_sum_levin_utrunc_alloc(n);
gsl_sum_levin_utrunc_accel(ptr, n, w, &sum, &err);
sum_plain = w->sum_plain;
terms_used = w->terms_used;
gsl_sum_levin_utrunc_free(w);
return rb_ary_new3(4, rb_float_new(sum), rb_float_new(err),
rb_float_new(sum_plain), INT2FIX(terms_used));
}
static VALUE rb_gsl_sum_levin_u_new(VALUE klass, VALUE nn)
{
gsl_sum_levin_u_workspace *w = NULL;
CHECK_FIXNUM(nn);
w = gsl_sum_levin_u_alloc(FIX2INT(nn));
return Data_Wrap_Struct(klass, 0, gsl_sum_levin_u_free, w);
}
static VALUE rb_gsl_sum_levin_utrunc_new(VALUE klass, VALUE nn)
{
gsl_sum_levin_utrunc_workspace *w = NULL;
CHECK_FIXNUM(nn);
w = gsl_sum_levin_utrunc_alloc(FIX2INT(nn));
return Data_Wrap_Struct(klass, 0, gsl_sum_levin_utrunc_free, w);
}
/* singleton */
static VALUE rb_gsl_sum_levin_u_accel2(VALUE obj, VALUE vv)
{
gsl_sum_levin_u_workspace *w = NULL;
double sum, err, sum_plain;
size_t terms_used, n, stride;
double *ptr;
ptr = get_vector_ptr(vv, &stride, &n);
w = gsl_sum_levin_u_alloc(n);
gsl_sum_levin_u_accel(ptr, n, w, &sum, &err);
sum_plain = w->sum_plain;
terms_used = w->terms_used;
gsl_sum_levin_u_free(w);
return rb_ary_new3(4, rb_float_new(sum), rb_float_new(err),
rb_float_new(sum_plain), INT2FIX(terms_used));
}
static VALUE rb_gsl_sum_levin_utrunc_accel2(VALUE obj, VALUE vv)
{
gsl_sum_levin_utrunc_workspace *w = NULL;
double sum, err, sum_plain;
size_t terms_used, n, stride;
double *ptr;
ptr = get_vector_ptr(vv, &stride, &n);
w = gsl_sum_levin_utrunc_alloc(n);
gsl_sum_levin_utrunc_accel(ptr, n, w, &sum, &err);
sum_plain = w->sum_plain;
terms_used = w->terms_used;
gsl_sum_levin_utrunc_free(w);
return rb_ary_new3(4, rb_float_new(sum), rb_float_new(err),
rb_float_new(sum_plain), INT2FIX(terms_used));
}
static VALUE rb_gsl_sum_levin_u_sum_plain(VALUE obj)
{
gsl_sum_levin_u_workspace *w = NULL;
Data_Get_Struct(obj, gsl_sum_levin_u_workspace, w);
return rb_float_new(w->sum_plain);
}
static VALUE rb_gsl_sum_levin_u_terms_used(VALUE obj)
{
gsl_sum_levin_u_workspace *w = NULL;
Data_Get_Struct(obj, gsl_sum_levin_u_workspace, w);
return INT2FIX(w->terms_used);
}
static VALUE rb_gsl_sum_levin_utrunc_sum_plain(VALUE obj)
{
gsl_sum_levin_utrunc_workspace *w = NULL;
Data_Get_Struct(obj, gsl_sum_levin_utrunc_workspace, w);
return rb_float_new(w->sum_plain);
}
static VALUE rb_gsl_sum_levin_utrunc_terms_used(VALUE obj)
{
gsl_sum_levin_utrunc_workspace *w = NULL;
Data_Get_Struct(obj, gsl_sum_levin_utrunc_workspace, w);
return INT2FIX(w->terms_used);
}
void Init_gsl_sum(VALUE module)
{
VALUE mgsl_sum;
VALUE cgsl_sum_levin_u, cgsl_sum_levin_utrunc;
mgsl_sum = rb_define_module_under(module, "Sum");
cgsl_sum_levin_u = rb_define_class_under(mgsl_sum,
"Levin_u", cGSL_Object);
cgsl_sum_levin_utrunc = rb_define_class_under(mgsl_sum,
"Levin_utrunc", cGSL_Object);
rb_define_singleton_method(cgsl_sum_levin_u, "new", rb_gsl_sum_levin_u_new, 1);
rb_define_singleton_method(cgsl_sum_levin_u, "alloc", rb_gsl_sum_levin_u_new, 1);
rb_define_singleton_method(cgsl_sum_levin_utrunc, "new",
rb_gsl_sum_levin_utrunc_new, 1);
rb_define_singleton_method(cgsl_sum_levin_utrunc, "alloc",
rb_gsl_sum_levin_utrunc_new, 1);
rb_define_singleton_method(cgsl_sum_levin_u, "accel",
rb_gsl_sum_levin_u_accel2, 1);
rb_define_singleton_method(cgsl_sum_levin_utrunc, "accel",
rb_gsl_sum_levin_utrunc_accel2, 1);
rb_define_method(cgsl_sum_levin_u, "accel", rb_gsl_sum_levin_u_accel2, 1);
rb_define_method(cgsl_sum_levin_utrunc, "accel",
rb_gsl_sum_levin_utrunc_accel2, 1);
rb_define_method(cgsl_sum_levin_u, "sum_plain", rb_gsl_sum_levin_u_sum_plain, 0);
rb_define_method(cgsl_sum_levin_u, "terms_used",
rb_gsl_sum_levin_u_terms_used, 0);
rb_define_method(cgsl_sum_levin_utrunc, "sum_plain",
rb_gsl_sum_levin_utrunc_sum_plain, 0);
rb_define_method(cgsl_sum_levin_utrunc, "terms_used",
rb_gsl_sum_levin_utrunc_terms_used, 0);
/***/
rb_define_method(cgsl_vector, "accel_sum", rb_gsl_sum_accel, 0);
rb_define_alias(cgsl_vector, "accel", "accel_sum");
rb_define_alias(cgsl_vector, "sum_accel", "accel_sum");
rb_define_method(cgsl_vector, "utrunc_accel", rb_gsl_utrunc_accel, 0);
#ifdef HAVE_NARRAY_H
rb_define_method(cNArray, "accel_sum", rb_gsl_sum_accel, 0);
rb_define_alias(cNArray, "accel", "accel_sum");
rb_define_alias(cNArray, "sum_accel", "accel_sum");
rb_define_method(cNArray, "utrunc_accel", rb_gsl_utrunc_accel, 0);
#endif
}
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