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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
// IfExpr.cpp: implementation of the CIfExpr class.
/*
* Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Erwin Coumans makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
#include "IfExpr.h"
#include "EmptyValue.h"
#include "ErrorValue.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CIfExpr::CIfExpr()
{
}
CIfExpr::CIfExpr(CExpression *guard, CExpression *e1, CExpression *e2)
/*
pre:
effect: constructs an CifExpr-object corresponding to IF(guard, e1, e2)
*/
{
m_guard = guard;
m_e1 = e1;
m_e2 = e2;
}
CIfExpr::~CIfExpr()
/*
pre:
effect: dereferences the object
*/
{
if (m_guard)
m_guard->Release();
if (m_e1)
m_e1->Release();
if (m_e2)
m_e2->Release();
}
CValue* CIfExpr::Calculate()
/*
pre:
ret: a new object containing the value of m_e1 if m_guard is a boolean TRUE
a new object containing the value of m_e2 if m_guard is a boolean FALSE
an new errorvalue if m_guard is not a boolean
*/
{
CValue *guardval;
guardval = m_guard->Calculate();
STR_String text = guardval->GetText();
guardval->Release();
if (text == STR_String("TRUE"))
{
return m_e1->Calculate();
}
else if (text == STR_String("FALSE"))
{
return m_e2->Calculate();
}
else
{
return new CErrorValue("Guard should be of boolean type");
}
}
bool CIfExpr::MergeExpression(CExpression *otherexpr)
{
assertd(false);
return false;
}
bool CIfExpr::IsInside(float x,float y,float z,bool bBorderInclude)
{
assertd(false);
return false;
}
bool CIfExpr::NeedsRecalculated()
{
return (m_guard->NeedsRecalculated() ||
m_e1->NeedsRecalculated() ||
m_e2->NeedsRecalculated());
}
CExpression* CIfExpr::CheckLink(std::vector<CBrokenLinkInfo*>& brokenlinks)
{
assertd(false);
return NULL;
}
void CIfExpr::ClearModified()
{
assertd(false);
}
void CIfExpr::BroadcastOperators(VALUE_OPERATOR op)
{
assertd(false);
}
unsigned char CIfExpr::GetExpressionID()
{
return CIFEXPRESSIONID;
}
|
