src/Operators.cpp

   1 /*******************************************************************************
   2  * Reverse Polish Notation calculator.                                         *
   3  * Copyright (c) 2007-2008, Samuel Fredrickson <kinghajj@gmail.com>            *
   4  * All rights reserved.                                                        *
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  26
  27 /*******************************************************************************
  28  * Operators.cpp - operator functions.                                         *
  29  ******************************************************************************/
  30
  31 #include "rpn.h"
  32 #include <cmath>
  33 using namespace std;
  34 using namespace RPN;
  35
  36 #ifndef DOXYGEN_SKIP
  37
  38 static Value addition(Value a, Value b)
  39 {
  40     return a + b;
  41 }
  42
  43 static Value subtraction(Value a, Value b)
  44 {
  45     return a - b;
  46 }
  47
  48 static Value multiplication(Value a, Value b)
  49 {
  50     return a * b;
  51 }
  52
  53 static Value division(Value a, Value b)
  54 {
  55     return a / b;
  56 }
  57
  58 static Value power(Value a, Value b)
  59 {
  60 #ifdef RPN_DOUBLE
  61     return pow(a, b);
  62 #elif  RPN_LONG_DOUBLE
  63     return powl(a, b);
  64 #endif
  65 }
  66
  67 static Value equals(Value a, Value b)
  68 {
  69     return a == b ? 1 : 0;
  70 }
  71
  72 static Value modulo(Value a, Value b)
  73 {
  74     return (long)a % (long)b;
  75 }
  76
  77 static Value _xor(Value a, Value b)
  78 {
  79     return (long)a ^ (long)b;
  80 }
  81
  82 static Value _and(Value a, Value b)
  83 {
  84     return (long)a & (long)b;
  85 }
  86
  87 static Value _or(Value a, Value b)
  88 {
  89     return (long)a | (long)b;
  90 }
  91
  92 #endif
  93
  94 Operators RPN::defaultOperators()
  95 {
  96     Operators ret;
  97
  98     ret["+"]  = addition;
  99     ret["-"]  = subtraction;
 100     ret["*"]  = multiplication;
 101     ret["/"]  = division;
 102     ret["**"] = power;
 103     ret["="]  = equals;
 104     ret["%"]  = modulo;
 105     ret["^"]  = _xor;
 106     ret["&"]  = _and;
 107     ret["|"]  = _or;
 108
 109     return ret;
 110 }