src/Number.cpp

   1 /*    Copyright (C) 2008,  Kristian Rumberg (kristianrumberg@gmail.com)
   2  *
   3  *    Permission to use, copy, modify, and/or distribute this software for any
   4  *    purpose with or without fee is hereby granted, provided that the above
   5  *    copyright notice and this permission notice appear in all copies.
   6  *
   7  *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   8  *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   9  *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  10  *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  11  *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  12  *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  13  *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  14  *
  15  */
  16
  17 #ifndef NUMBER_HPP
  18 #define NUMBER_HPP
  19
  20 #include "Number.hpp"
  21 #include "Exception.hpp"
  22
  23 Number::Number(long val)
  24 {
  25     m_val.l = val;
  26     m_type = T_INTEGER;
  27 }
  28
  29 Number::Number(double val)
  30 {
  31     m_val.d = val;
  32     m_type = T_DOUBLE;
  33 }
  34
  35 #define GET_NUMBER_VAL(n)    (((n).m_type == T_INTEGER)? (n).m_val.l : (n).m_val.d)
  36 #define PERFORM_OPERATION(op)   ( GET_NUMBER_VAL(*this) op GET_NUMBER_VAL(n) )
  37
  38 Number Number::operator+(const Number& n) const {
  39     return PERFORM_OPERATION(+);
  40 }
  41
  42 Number Number::operator-(const Number& n) const {
  43     return PERFORM_OPERATION(-);
  44 }
  45
  46 Number Number::operator*(const Number& n) const {
  47     return PERFORM_OPERATION(*);
  48 }
  49
  50 Number Number::operator/(const Number& n) const {
  51     if (GET_NUMBER_VAL(n) == 0) throw DivByZero("");
  52     return PERFORM_OPERATION(/);
  53 }
  54
  55 Number Number::eval() const {
  56     return *this;
  57 }
  58
  59 std::ostream& operator<<(std::ostream& os, const Number& n) {
  60     std::cout << GET_NUMBER_VAL(n);
  61 }
  62
  63 #endif