145 lines
2.5 KiB
C++
145 lines
2.5 KiB
C++
/** \file gameengine/Expressions/IfExpr.cpp
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* \ingroup expressions
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*/
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// IfExpr.cpp: implementation of the CIfExpr class.
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/*
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* Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Erwin Coumans makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*/
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#include "IfExpr.h"
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#include "EmptyValue.h"
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#include "ErrorValue.h"
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#include "BoolValue.h"
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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CIfExpr::CIfExpr()
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{
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}
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CIfExpr::CIfExpr(CExpression *guard, CExpression *e1, CExpression *e2)
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/*
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pre:
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effect: constructs an CifExpr-object corresponding to IF(guard, e1, e2)
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*/
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{
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m_guard = guard;
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m_e1 = e1;
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m_e2 = e2;
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}
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CIfExpr::~CIfExpr()
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/*
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pre:
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effect: dereferences the object
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*/
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{
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if (m_guard)
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m_guard->Release();
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if (m_e1)
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m_e1->Release();
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if (m_e2)
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m_e2->Release();
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}
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CValue* CIfExpr::Calculate()
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/*
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pre:
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ret: a new object containing the value of m_e1 if m_guard is a boolean TRUE
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a new object containing the value of m_e2 if m_guard is a boolean FALSE
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an new errorvalue if m_guard is not a boolean
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*/
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{
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CValue *guardval;
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guardval = m_guard->Calculate();
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const STR_String& text = guardval->GetText();
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guardval->Release();
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if (&text == &CBoolValue::sTrueString)
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{
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return m_e1->Calculate();
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}
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else if (&text == &CBoolValue::sFalseString)
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{
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return m_e2->Calculate();
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}
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else
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{
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return new CErrorValue("Guard should be of boolean type");
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}
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}
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bool CIfExpr::MergeExpression(CExpression *otherexpr)
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{
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assertd(false);
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return false;
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}
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bool CIfExpr::IsInside(float x,float y,float z,bool bBorderInclude)
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{
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assertd(false);
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return false;
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}
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bool CIfExpr::NeedsRecalculated()
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{
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return (m_guard->NeedsRecalculated() ||
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m_e1->NeedsRecalculated() ||
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m_e2->NeedsRecalculated());
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}
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CExpression* CIfExpr::CheckLink(std::vector<CBrokenLinkInfo*>& brokenlinks)
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{
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assertd(false);
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return NULL;
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}
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void CIfExpr::ClearModified()
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{
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assertd(false);
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}
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void CIfExpr::BroadcastOperators(VALUE_OPERATOR op)
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{
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assertd(false);
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}
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unsigned char CIfExpr::GetExpressionID()
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{
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return CIFEXPRESSIONID;
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}
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