raytracer/AddfOperator.h at master · markuskr/raytracer · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
//----------------------------------------------------------------------
/// \autor Group:    20
/// \brief The operator for the addf function.
/// Last Changes: 22.06.2008
//----------------------------------------------------------------------

#ifndef ADDFOPERATOR_H_
#define ADDFOPERATOR_H_

#include "GMLOperator.h"
#include "GMLToken.h"
#include "TokenTypes.h"

#include <exception>
#include <stdexcept>
#include <vector>
#include <string>
#include <memory>
#include <string>
#include <iostream>

class AddfOperator : public GMLOperator
{
public:
  //-------------------------------------------------------------------
  ///  \param stack execution stack of the interpreter

  AddfOperator(std::vector<GMLToken> &stack) :
    GMLOperator(stack)
  {
    m_name = "addf";
  };

  //-------------------------------------------------------------------

  ~AddfOperator()
  {};

  //-------------------------------------------------------------------
  /// \brief execution of the token

  void execute() const
  {
    GMLToken operand1;
    GMLToken operand2;

    if (m_stack.empty())
      throw std::runtime_error("ERROR addf: Stack is empty");

    operand1 = m_stack.back();
    m_stack.pop_back();

    if (m_stack.empty())
      throw std::runtime_error("ERROR addf: Stack is empty");

    operand2 = m_stack.back();
    m_stack.pop_back();

    if (operand1.m_type == INTEGER)
    {
      operand1.m_float[0] = (float)operand1.m_int[0];
      operand1.m_type = FLOAT;
    }
    if (operand2.m_type == INTEGER)
    {
      operand2.m_float[0] = (float)operand2.m_int[0];
      operand2.m_type = FLOAT;
    }

    if ((operand1.m_type == FLOAT) && (operand2.m_type == FLOAT))
    {
      float result = operand1.m_float[0] + operand2.m_float[0];
      GMLToken token;
      token.m_type = FLOAT;
      token.m_float[0] = result;

      m_stack.push_back(token);
    }

  };
};

#endif /*ADDFOPERATOR_H_*/