Filling in branch from trunk

source/gameengine/Expressions/IfExpr.cpp

@@ -0,0 +1,144 @@
+// 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;
+}