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/*
sf_power.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 "rb_gsl_sf.h"
VALUE rb_gsl_complex_pow(int argc, VALUE *argv, VALUE obj);
static VALUE rb_gsl_sf_pow_int(VALUE obj, VALUE x, VALUE n)
{
VALUE argv[2];
if (COMPLEX_P(x) || VECTOR_COMPLEX_P(x) || MATRIX_COMPLEX_P(x)) {
argv[0] = x;
argv[1] = n;
return rb_gsl_complex_pow(2, argv, obj);
}
return rb_gsl_sf_eval_double_int(gsl_sf_pow_int, x, n);
}
static VALUE rb_gsl_sf_pow_int_e(VALUE obj, VALUE x, VALUE n)
{
gsl_sf_result *rslt = NULL;
VALUE v;
// local variable "status" declared and set, but never used
//int status;
Need_Float(x);
CHECK_FIXNUM(n);
v = Data_Make_Struct(cgsl_sf_result, gsl_sf_result, 0, free, rslt);
/*status =*/ gsl_sf_pow_int_e(NUM2DBL(x), FIX2INT(n), rslt);
return v;
}
void Init_gsl_sf_power(VALUE module)
{
VALUE mgsl_sf_pow;
rb_define_module_function(module, "pow_int", rb_gsl_sf_pow_int, 2);
rb_define_module_function(module, "pow_int_e", rb_gsl_sf_pow_int_e, 2);
mgsl_sf_pow = rb_define_module_under(module, "Pow");
rb_define_module_function(mgsl_sf_pow, "int", rb_gsl_sf_pow_int, 2);
rb_define_module_function(mgsl_sf_pow, "int_e", rb_gsl_sf_pow_int_e, 2);
}
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