Class: String

Inherits:
Object
  • Object
show all
Defined in:
(unknown)

Instance Method Summary collapse

Instance Method Details

#to_numberObject



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# File 'ext/number/number.c', line 14

VALUE rb_String_to_number (VALUE str)
{
    VALUE complex_regex = rb_reg_new_str(rb_enc_str_new("^(.*[^\\s]+)\\s*\\+\\s*(.*)i$", strlen("^(.*[^\\s]+)\\s*\\+\\s*(.*)i$"), rb_utf8_encoding()), 0);
    VALUE complex_match = rb_funcall(complex_regex, rb_intern("match"), 1, str);
    
    if (RTEST(complex_match))
    {
        VALUE complex_captures = rb_funcall(complex_match, rb_intern("captures"), 0);
        return rb_funcall(Qnil, rb_intern("Number"), 2, RARRAY_PTR(complex_captures)[0], RARRAY_PTR(complex_captures)[1]);
    }
    else
    {
        VALUE interval_regex = rb_reg_new_str(rb_enc_str_new("^\\[(.*[^\\s]+)\\s*([<≤])\\s*\\((.*[^\\s]+)\\)\\s*([<≤])\\s*(.*[^\\s]+)\\]$", strlen("^\\[(.*[^\\s]+)\\s*([<≤])\\s*\\((.*[^\\s]+)\\)\\s*([<≤])\\s*(.*[^\\s]+)\\]$"), rb_utf8_encoding()), 0);
        VALUE interval_match = rb_funcall(interval_regex, rb_intern("match"), 1, str);
        
        if (RTEST(interval_match))
        {
            VALUE interval_captures = rb_funcall(interval_match, rb_intern("captures"), 0);
            return rb_funcall(Qnil, rb_intern("Number"), 5, RARRAY_PTR(interval_captures)[0], RARRAY_PTR(interval_captures)[2], RARRAY_PTR(interval_captures)[4], *RSTRING_PTR(RARRAY_PTR(interval_captures)[2]) == '<' ? Qtrue : Qfalse, *RSTRING_PTR(RARRAY_PTR(interval_captures)[4]) == '<' ? Qtrue : Qfalse);
        }
        else
        {
            VALUE real_regex = rb_reg_new_str(rb_enc_str_new("^([+-]?[0-9]+):([+-]?[0-9]+)$", strlen("^([+-]?[0-9]+):([+-]?[0-9]+)$"), rb_utf8_encoding()), 0);
            VALUE real_match = rb_funcall(real_regex, rb_intern("match"), 1, str);
            
            if (RTEST(real_match))
            {
                VALUE real_captures = rb_funcall(real_match, rb_intern("captures"), 0);
                VALUE result = rb_obj_alloc(rb_cNumber);
                VALUE integer = rb_funcall(RARRAY_PTR(real_captures)[1], rb_intern("to_i"), 0);
                Real* real = real_from_str((char*)RSTRING_PTR(RARRAY_PTR(real_captures)[0]), NUM2LONG(integer));
                
                DATA_PTR(result) = complex_from_real(real);
                real_free(real);
                
                return result;
            }
            else if (RSTRING_PTR(str)[0] == -61)
            {
                VALUE result = rb_obj_alloc(rb_cNumber);
                DATA_PTR(result) = complex_nan();
                
                return result;
            }
            else if (RSTRING_PTR(str)[0] == -30)
            {
                VALUE result = rb_obj_alloc(rb_cNumber);
                DATA_PTR(result) = complex_pos_inf();
                
                return result;
            }
            else if ((RSTRING_PTR(str)[0] == 43 || RSTRING_PTR(str)[0] == 45) && RSTRING_PTR(str)[1] == -30)
            {
                VALUE result = rb_obj_alloc(rb_cNumber);
                DATA_PTR(result) = (RSTRING_PTR(str)[0] == 43) ? complex_pos_inf() : complex_neg_inf();
                
                return result;
            }
            else
            {
                VALUE integer_regex = rb_reg_new_str(rb_enc_str_new("^([+-]?[0-9]+)$", strlen("^([+-]?[0-9]+)$"), rb_utf8_encoding()), 0);
                VALUE integer_match = rb_funcall(integer_regex, rb_intern("match"), 1, str);
                
                if (RTEST(integer_match))
                {
                    return rb_funcall(rb_funcall(str, rb_intern("to_i"), 0), rb_intern("to_number"), 0);
                }
                else
                {
                    return rb_funcall(rb_funcall(str, rb_intern("to_f"), 0), rb_intern("to_number"), 0);
                }
            }
        }
    }
    
    /* not reached */
    return Qnil;
}